KINDAI UNIVERSITY


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HOSHI Takehiko

Profile

FacultyDepartment of Biotechnological Science / Graduate School of Biology-Oriented Science and Technology
PositionProfessor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/151-hoshi-takehiko.html
URLhttp://www.hoshi-lab.info/home.html
Mail
Last Updated :2020/09/30

Education and Career

Education

  •   1979 04  - 1983 03 , Chiba University, Faculty of Horticulture

Academic & Professional Experience

  •   2012 04 ,  - 現在, Faculty of Biology-Oriented Science and Technology, Kindai University
  •   2005 04 ,  - 2012 03 , Professor, School of High-Technology for Human Welfare, Tokai University
  •   1996 04 ,  - 2005 03 , Associate Professor, School of High-Technology for Human Welfare, Tokai University
  •   1991 04 ,  - 1996 03 , Lecturer, School of High-Technology for Human Welfare, Tokai University
  •   1989 07 ,  - 1991 03 , Assistant Professor, Tokai University

Research Activities

Research Areas

  • Informatics, Sensitivity (kansei) informatics
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Control and systems engineering
  • Environmental science/Agricultural science, Horticulture
  • Environmental science/Agricultural science, Agricultural environmental and information engineering

Research Interests

  • Deep Learning, Name Space, Ubiquitous Environment Control System, UECS, agricultural informatics, plant environmental control engineering, plant production engineering, Java, SOAP

Published Papers

  • Digitally Fabricated Mobile Spectrometer for Multipoint Continuous Spectroscopic Analysis of Light Environment in Greenhouse Tomato Canopies, Takehiko HOSHI, Kenta UEDA, Yoshihiro TAKIKAWA, Takaya AZUMA, Environmental Control in Biology, Environmental Control in Biology, 56(4), 149 - 155, Oct. 2018 , Refereed
    Summary:A low-cost spectrometer, featuring a micro electro mechanical systems (MEMS) sensor, was designed and manufactured using digital fabrication techniques. The spectrometer was morphed into a zelkova leaf-shaped case using a three-dimensional printer. The control software, written in the Arduino sketch programing language, measured the flux of photons in the 400―800 nm range, at 1 nm resolution, every 5 min. The obtained data were saved on a micro SD memory card in the comma separated values format. The spectrometer continuously operated for more than 3 d using a type B universal serial bus micro connector and a 10 Ah mobile battery. Four manufactured spectrometers were installed inside and outside of a tomato canopy in the experimental greenhouse of Wakayama prefecture, and continuously measured the spectroscopic flux of photons for nine d. The quantitative changes in the phytochrome photoequilibrium in the tomato leaves were estimated using the data from the continuous spectroscopic analysis. The effect of pruning under leaves on the illumination in the tomato canopy was quantified in terms of the leaf area index. We expect that the proposed low-cost and high-mobility spectrometer will be used in plant production fields.
  • Development of Program Library Using an Open-source Hardware for Implementation of Low-cost Greenhouse Environmental Control System, Ken-ichiro YASUBA, Hidehito KUROSAKI, Takehiko HOSHI, Takashi OKAYASU, Yoshiyuki TANAKA, Tanjuro GOTO, Yuichi YOSHIDA, Environmental Control in Biology, Environmental Control in Biology, 56(3), 107 - 112, Jul. 2018 , Refereed
    Summary:A program library for use on open-source hardware was developed in order to construct a low-cost environmental control system for greenhouses. The library facilitated the development of environmental sensing and control devices that conform to the protocols of the Ubiquitous Environment Control System (UECS). The open-source hardware used was the "Arduino Ethernet" and the "Arduino Mega 2560 with Ethernet Shield" microcontroller boards. UECS is a system for controlling greenhouse environments that communicates information via a local area network, and devices utilizing the library that we developed can perform the UECS defined communication tasks automatically. With the help of this library, device developers no longer need to program the communications aspects of the device and can concentrate on programming setting and control logic of the device. The library occupies about 29 kilobytes of the read only memory area of the target board. The library and associated open-source microcontroller boards are powerful tools for developing low-cost environmental control systems.
  • Present Situation and Prospects of Japanese Protected Horticulture and Ubiquitous Environment Control Systems, Takehiko HOSHI, Ken-ichiro YASUBA, Hideto KUROSAKI, Shokubutsu Kankyou Kougaku, Shokubutsu Kankyou Kougaku, 28(4), 163 - 171, Dec. 2016 , Refereed
    Summary:One powerful solution to improve the productivity of protected horticultural facilities is environmental control. Greenhouse equipment using information and communication technology (ICT) has been implemented in environmental control systems. From the 1960s to the 1970s, fundamental research and development of environmental control systems for greenhouses were actively conducted. Environmental control systems employing microprocessors and PCs began to be introduced in Japanese commercial greenhouses in the 1980s. However, by 2012, only 1.41 % of total Japanese greenhouse area employed such systems. To create a smart greenhouse that employed ICT, a ubiquitous environment control system (UECS) was developed for practical use in 2004. In a UECS, each environmental measurement and control device in the greenhouse (ventilation window motor, heating device, etc.) with an embedded microprocessor is called an autonomous decentralized unit (node). The nodes are connected with each other through the Ethernet (IEEE803.2), and they control environments in a coordinated manner. We reviewed the present situation and prospects of UECS.
  • Development of a Field Environmental Monitoring Node with Over the Air Update Function, Andri Prima Nugroho, Takashi Okayasu, Masafumi Horimoto, Daisaku Arita, Takehiko Hoshi, Hidehito Kurosaki, Ken-ichiro Yasuba, Eiji Inoue, Yasumaru Hirai, Muneshi Mitsuoka, Lilik Sutiarso, Agricultural Information Research, Agricultural Information Research, 25(3), 86 - 95, Oct. 2016 , Refereed
    Summary:The monitoring node is one of the most important system components in the remote and automatic measurement of environmental information. Simplicity, flexibility, and affordability are critical in agricultural applications. The objective of this study was to design and develop a low-cost and robust remote environmental monitoring node based on a microcontroller board with a wireless communication module and an over-the-air (OTA) update function for flexible node management. The monitoring system consists of a cloud-based global management subsystem and a local management subsystem for each monitoring node. The node was developed using the Particle Core, reprogrammable Wi-Fi development kit, which fulfills the requirements for monitoring node mentioned above. The performance evaluation of the stability and the OTA update function were conducted under two network conditions: (1) high-speed network and (2) regular mobile 3G-network as actual application setup. The stability and availability test observed over 95% of the “timely measurements”, a completed measurement within the specified time interval, 99.86% for the condition 1 under high-quality network, and 95.02% for the condition 2. The OTA firmware update process was completed in approximately 60 s. We concluded that the developed environmental monitoring node based on a low-cost microcontroller having internal Wi-Fi module and OTA update function has the potential to increase the simplicity, flexibility, and affordability of remote environmental monitoring node in agricultural applications.
  • Weatherability Evaluation of Low-cost Relative Humidity Sensors for Measuring Equipment in Greenhouse Environment, Takehiko Hoshi, Shinnosuke Ochi, Tomonori Matsuyama, Ken-ichro Yasuba, Hideto Kurosaki, Takashi Okayasu, Agricultural Information Research, Agricultural Information Research, 25(3), 79 - 85, Oct. 2016 , Refereed
    Summary:Although many kinds of low-cost, commercially available relative humidity (RH) sensors are used in greenhouses, it is not known whether they have sufficient weather resistance in that environment. We tested the weather resistance of 6 kinds of low-cost RH sensors in a tomato production greenhouse for 3 months. At RH > 90%, the values reported by the sensors were reduced by up to 4%. This reduced accuracy can pose problems, since high humidity influences transpiration, condensation, and disease incidence. When low-cost RH sensors are used in greenhouses, it may be necessary to allow for this deterioration.
  • UDP Packet-Processing Capacity on an Arduino Node for Ubiquitous Environment Control System, KUROSAKI, H, YASUBA, K, OKAYASU, T, HOSHI, T, Agricultural Information Research, Agricultural Information Research, 25(1), 19 - 28, Apr. 2016 , Refereed
    Summary:The Arduino platform is suitable for the development of Ubiquitous Environmental Control System (UECS) nodes. However, its network capacity must be investigated to improve its reliability in practical use. In this study, we tested the UDP packet-receiving capacity of multiple combinations of Arduino platforms running on 16 MHz ATmega CPU and Ethernet communication shields. Test results showed that the mounted Ethernet controller was the primary determinant of packet-receiving capacity. The maximum receiving capacities for 200-byte UDP packets on W5100 and W5500 Ethernet controllers were 327 and 576 packets/second, respectively. Stress on the HTTP server response or on communication with an SHT75 humidity and temperature sensor lowered packet receiving capacity. Therefore, if a rapid response is required on a node, high-load processing must be eliminated. We estimated that the tested capacity of any Arduino platform was sufficient to control a small- or medium-scale greenhouse. In addition, if the packet communication area is adequately controlled, an Arduino platform could be employed in large-scale greenhouses. Sending packets to unused ports at an interval of 1,152 packets/second had no effect on receiving capacity, indicating that a method that would allow more nodes to coexist by isolating port assignments would be beneficial.
  • Development of a Program Library to Cpnstruct a Low-Cost Environmental Control System, YASUBA, K, TANE, C, TANAKA, Y, GOTO, T, YOSHIDA, Y, KUROSAKI, H, OKAYASU, T, HOSHI, T, Agricultural Information Research, Agricultural Information Research, 25(1), 12 - 18, Apr. 2016 , Refereed
    Summary:A Java class library was developed to construct a Ubiquitous Environment Control System (UECS), and the developed system was used to control the environment in a greenhouse using information communication. The library was able to implement the UECS communication protocol, so a developer could write a program without referring to the complicated communication protocol. Specifically, we created a program for operating a ventilation fan using data on air temperature that was received automatically via a local area network. In this case, only 45 lines of programming were needed, just 3.6% of the the number that would be needed to create an equivalent program without the library. Java programs can run on a variety of platforms, so the scope of the library’s application is wide. In addition, both the development of UECS devices and construction of UECS systems will be facilitated through the use of this library.
  • Utilization of Sensor Network System in Agriculture, OKAYASU TAKASHI, ARITA DAISAKU, NUGROHO ANDRI PRIMA, HOSHI TAKEHIKO, YOSHINAGA TAKASHI, INOUE EIJI, HIRAI YASUMARU, MITSUOKA MUNESHI, 情報処理学会研究報告(Web), 情報処理学会研究報告(Web), 2014(CVIM-191(12)), 1 - 6, Feb. 2014 , Refereed
  • Trial Development of Ubiquitous Environment Control System Applications to Establish One-stop Management System for Greenhouse Environments by Mobile Electronic Devices, HOSHI TAKEHIKO, OHATA RYOSUKE, WATANABE KATSUYOSHI, UEDA SHOJIRO, NANSEKI TERUAKI, 農業情報研究(Web), 農業情報研究(Web), 22(4), 193 - 200, Dec. 2013 , Refereed
  • Establishment of an Environmental Measurement Node Using Open Source Hardware, YASUBA KEN'ICHIRO, HOSHI TAKEHIKO, KANEKO SO, HIGASHIDE TADAHISA, OMORI HIROMI, NAKANO AKIMASA, 農業情報研究(Web), 農業情報研究(Web), 22(4), 247 - 255, Dec. 2013 , Refereed
  • Development of Social Network Service Type Applications on the Android Platform for Recording and Sharing Crop Cultivation Information Using the Extended Ubiquitous Environment Control System Communication Protocol, OHATA RYOSUKE, HOSHI TAKEHIKO, WATANABE KATSUYOSHI, UEDA SHOJIRO, YASUBA KEN'ICHIRO, NANSEKI TERUAKI, HAYASHI MAKIO, 農業情報研究(Web), 農業情報研究(Web), 22(2), 96 - 102, Jul. 2013 , Refereed
    Summary:We proposed and developed a "one-stop service system to support protected horticultural production" in greenhouses based on the working standard for the Ubiquitous Environment Control System (UECS) standard. To record and share crop cultivation information in the form of an electronic field note, we developed and tested two applications based on the Android platform and the extended UECS communication protocol (UECS-CCM). We named the applications the UECS tweeting application (Tsubuyaki-appli) and the UECS tweet-sharing application (Kyoyu-appli). Tsubuyaki-appli sends extended UECS-CCM packets over a greenhouse local area network (LAN). The packets include a photo of the greenhouse crop and a short description, and are transmitted using mobile devices such as an Android smartphone. Kyoyu-appli receives the extended UECS-CCM packets and displays the received information by using a social network service interface. Our testing of both applications revealed that they promoted sharing of information among greenhouse workers, with the only requirement being a low-cost Android device. We expect that such applications will lead to further advances in greenhouse crop production technology.
  • Trial Development of Ubiquitous Environment Control System Applications to Establish One-stop Management System for Greenhouse Environments by Mobile Electronic Devices, Hoshi Takehiko, Ohata Ryosuke, Watanabe Katsuyoshi, Ueda Syojiro, Nanseki Teruaki, Agricultural Information Research, Agricultural Information Research, 22(4), 193 - 200, 2013
    Summary:We propose a mobile gadget-based system for managing greenhouse plant production based on the Ubiquitous Environment Control System—Common Corresponding Message (UECS-CCM) standard. The system allows greenhouse growers to manage production from a mobile electronic device such as a smartphone or tablet instead of a PC. To select the best device operating system (OS) to use, we developed and tested sample software to display environmental data collected and transmitted by the UECS from a climate monitor in a greenhouse, under Google Android OS and Apple iOS. Although the software performed similarly under each OS, differences in the reproducibility of display contents and in procedures for installation led us to adopt Android OS.
  • Development of Social Network Service Type Applications on the Android Platform for Recording and Sharing Crop Cultivation Information Using the Extended Ubiquitous Environment Control System Communication Protocol, Ohata Ryosuke, Hoshi Takehiko, Watanabe Katsuyoshi, Ueda Syojiro, Yasuba Kenichiro, Nanseki Teruaki, Hayashi Makio, Agricultural Information Research, Agricultural Information Research, 22(2), 96 - 102, 2013
    Summary:We proposed and developed a "one-stop service system to support protected horticultural production" in greenhouses based on the working standard for the Ubiquitous Environment Control System (UECS) standard. To record and share crop cultivation information in the form of an electronic field note, we developed and tested two applications based on the Android platform and the extended UECS communication protocol (UECS-CCM). We named the applications the UECS tweeting application (Tsubuyaki-appli) and the UECS tweet-sharing application (Kyoyu-appli). Tsubuyaki-appli sends extended UECS-CCM packets over a greenhouse local area network (LAN). The packets include a photo of the greenhouse crop and a short description, and are transmitted using mobile devices such as an Android smartphone. Kyoyu-appli receives the extended UECS-CCM packets and displays the received information by using a social network service interface. Our testing of both applications revealed that they promoted sharing of information among greenhouse workers, with the only requirement being a low-cost Android device. We expect that such applications will lead to further advances in greenhouse crop production technology.
  • A Gadget-Based Information Management System for Environmental Measurement and Control in Greenhouses, Takehiko Hoshi, Ryosuke Ohata, Katsuyoshi Watanabe, Ryuji Osuka, Proceedings of SICE Annual Conference 2011, Proceedings of SICE Annual Conference 2011, 2805 - 2810, Sep. 2011 , Refereed
  • Proposal for a Compact, Low-cost Vegetable Factory within a Living Space Using Bulb-type Fluorescent Lamps, HOSHI TAKEHIKO, SHIBATA TAKAYASU, FUKASAWA KAZUMASA, FUKASAWA TOSHIO, TAKATSUJI MASAMOTO, 植物環境工学, 植物環境工学, 22(4), 187 - 193, Dec. 2010 , Refereed
    Summary:An indoor, compact, low-cost vegetable production device that can be used within a living space is proposed for use by urban people wanting to produce their own vegetables. Based on measurements of living space environments, the limiting factor for such indoor vegetable cultivation is light intensity. Places where human beings can live comfortably do not need special controls for air temperature or CO2 concentration. To reduce costs, the device has only two control functions, hydroponics and artificial lighting. Bulb-type fluorescent lamps, which have the lowest lamp cost per a watt, are used as the light source. The device was designed and built to be produced at a unit cost of approximately 17,000 JPY. The external dimensions are 580 mm high, 590 mm wide, and 330 mm deep, and the device can cultivate up to six heads of leaf lettuce. The results from a series of cultivation tests to grow leafy vegetables show that the device is sufficiently simple that anyone can use it to cultivate vegetables. In the tests, electricity costs, which made up most of the running cost of the device, were approximately 900 JPY for one cultivation batch taking four weeks. Besides helping people easily cultivate their own vegetables, the device teaches the public about the vegetable production technology employed in hydroponic factories. Currently, we are working on developing a device that can be manufactured commercially.
  • Yield-increasing Effect and Economical Efficiency of Supplemental Lighting inside Tomato Canopy in Some Lighting Schedules, HAMAMOTO HIROSHI, HOSHI TAKEHIKO, OJIMA KAZUSHI, YAMAZAKI KEISUKE, 植物環境工学, 植物環境工学, 22(2), 95 - 99, Jun. 2010 , Refereed
    Summary:Comparison of the effects of supplemental lighting with fluorescent lamps inside the plant canopy on the yield of tomato plants (<I>Solanum lycopersicum</I> L.) was attempted under the following lighting schedules; A) 2 hours around sunrise, B) 2 hours before noon, C) 9 or 10 hours during the daytime, D) 2 hours before noon but only when sunlight was below 200 μmol m-2 s-1, and E) 9 or 10 hours during the daytime but only when sunlight was below 200 μmol m-2 s-1. Supplemental lighting increased yield in all schedules. Schedule C showed the largest increase, followed by B, and A. The limited lighting treatments (schedules D and E) were less effective than the corresponding unlimited treatments (schedules B and C). Schedule C was best in terms of increased yield in this experiment but was not efficient in terms of lighting cost. Schedule B was the most cost-effective option in this experiment but needed more decreasing of lighting costs for practical use.
  • A System to Control Greenhouse Air Temperature and Humidity by Adjusting Enthalpy and by Mist Cooling, YASUBA KEN'ICHIRO, KUROSAKI HIDEHITO, TAKAICHI MASUYUKI, OMORI HIROMI, KAWASHIMA HIROKI, HOSHI TAKEHIKO, 植物環境工学, 植物環境工学, 22(1), 29 - 35, Mar. 2010 , Refereed
    Summary:We developed a computer-based environmental control system that adjusts the roof window angle and applies mist to optimize the air temperature and humidity in a naturally ventilated greenhouse managed by a ubiquitous environmental control system (UECS). The window angle is adjusted every 2 min to keep the enthalpy in the greenhouse at 60 kJ kg-1, equivalent to air conditioning at 23°C and 82% relative humidity (RH). The rate of ventilation required to keep the enthalpy at 60 kJ kg-1 is calculated from the air temperature and RH inside and outside the greenhouse, and solar radiation outside by the heat balance method, and the roof windows are adjusted accordingly. Mist is sprayed at the same time if the RH is less than the target RH. The misting is stopped when the target RH is reached or after 90 s of continuous spraying.<BR>The environment was controlled between 10:00 and 14:00 from 1 to 6 November 2008. The average air temperature was 23 to 24°C, and the average RH was less than 2% higher than the target RH. On 2 November, the average enthalpy was 60.2 kJ kg-1 inside the greenhouse and fluctuated markedly, but it was much lower and more steady outside. More precise control would require shortening the adjustment interval. The ventilation rate was kept under 1 m3 m-2 min-1, which would be suitable for CO2-enrichment treatment.
  • Development of a Real-Time Calculating Node for Greenhouse Ventilation Rates and Evaporation Rates in a Decentralized Autonomous Enviornmental Control System, YASUBA KEN'ICHIRO, KUROSAKI HIDEHITO, TAKAICHI MASUYUKI, OMORI HIROMI, KAWASHIMA HIROKI, HOSHI TAKEHIKO, 植物環境工学, 植物環境工学, 21(4), 162 - 168, Dec. 2009 , Refereed
    Summary:A real-time calculating node for transmitting ventilation and evaporation rates, which are useful information for the control of mist cooling in a greenhouse, was developed for an Ubiquitous Environmental Controlling System (UECS). Information about the status of environmental controlling devices (e.g., the amount that the shade curtain is open) and sensor readings (e.g., for air temperature) are sent by broadcast delivery over a local area network (LAN). The node receives packets with information on air temperature inside and outside the greenhouse, air relative humidity inside and outside the greenhouse, solar radiation outside the greenhouse, and the degree of opening of the shade curtain, and then calculates the ventilation rate and evaporation rate by the heat balance method. In addition, it calculates the weight of misting water necessary to increase the relative humidity in the greenhouse to 100% and forecasts the air temperature at 100% humidity. It also calculates the weight of misting water required to drop the air temperature to a preset value and forecasts the relative humidity at that temperature. The node transmits the calculated values by the UECS communication standard. The user easily receives the ventilation rate and other useful information about mist cooling in real time using this node.
  • Development of a Low-cost and Highly Sensitive Detector of Dew Condensation and Fog Dropping in Protected Horticulture, HOSHI TAKEHIKO, SHINTANI KEIJI, HAYASHI YASUMASA, TAKAICHI MASUYUKI, 植物環境工学, 植物環境工学, 19(2), 96 - 100, Jun. 2007 , Refereed
    Summary:To detect moisture by dew condensation, precipitation and fog cooling in plant production,an electric resistance-type wetness detector was developed and tested. The detectingelectrode was produced by precise electronic circuit board technology using photoengraving.The electrode pattern was applied to the fractal curve, and the electrode gap was designatedas 250 μm. Tests using a trial manufactured detector were able to detect dew condensationwith high sensitivity, and worked effectively as a feedback sensor for the controller of thefog cooling system in greenhouses. The manufacturing cost of a case of 50 wetness detectioncircuit boards was 4830 yen per board.
  • Development of an Application Program for Field Servers to Acquire and Leverage Production History Information in Protected Horticuluture, HOSHI TAKEHIKO, SHIOZAWA EICHI, SHINMA KEITA, TAKAICHI MASUYUKI, HIRAFUJI MASAYUKI, 農業情報研究, 農業情報研究, 16(1), 29 - 36, Mar. 2007 , Refereed
    Summary:To leverage Field Servers in protected horticulture, a Java application program, BixFieldRecordServer (BFRS), was developed and tested. BFRS operated on personal computers, and recorded the environment and image data using information exchange standard format on XML for plant production (BIX-pp) from some Field Servers and network cameras through the Internet or greenhouse LAN automatically. BFRS also was able to record the other agricultural producing data, which was plant growth, farm working, using agricultural chemicals, amount of products etc., into the same BIX-pp format file using manual input form and CSV format file. We could easily generate the BIX-pp format file of integrated production history information in protected horticulture by BFRS. BFRS was tested in two actual plant production greenhouses to confirm the operation. By the results of tests, it was clarified that BFRS allowed growers in protected horticulture to leverage Field Servers. The growers who own Field Servers can download BFRS free of charge at http://w3.fb.u-tokai.ac.jp/bix-pp to record their production history information.<br>
  • Evaluation of the Usefulness of an Integrated Information Exchange Format for Plant Production (BIX-pp) By Application Computer Programs, HOSHI TAKEHIKO, SHIOZAWA EICHI, SUZUKI TAKAFUMI, 植物環境工学, 植物環境工学, 17(3), 150 - 156, Sep. 2005 , Refereed
    Summary:As an informational infrastructure for various utilizations of records on plant production and accomplishments of advanced plant production systems, BIX-pp (Bio-Information Exchange for Plant Production) which is an integrated information record format in a setting of plant production, has been proposed. The features of the format were evaluated using three application computer programs for BIX-pp. BixComposite is a computer program to compound and display plant production information and was able to vividly re-experience the past plant production by simple input of a BIX-pp file. A BIX-pp version SearchTool analyzes the causes of fluctuation and constructs a model for predicting daily plant production volumes, the labor involved in the conventional pretreatment to associate and unify various kinds of input data was mitigated using BIX-pp. Since informational structure and its definition can also be input to application programs using the BIX-pp, the programs were able to discriminate the input information and automatic execution was enabled. Records previously compiled the Comma Separated Value (CSV) format file can easily be converted using RecordConverter, which is a data conversion program that translates between the CSV and BIX-pp formats. Thus, records can be easily shifted to BIX-pp. Using the BIX-pp, use of plant production records for advanced plant production is expected to be enhanced.
  • 日生産量に影響する主要因子とその期間の探索を行なうソフトウェアの開発, SUZUKI TAKAFUMI, HOSHI TAKEHIKO, WATANABE TSUTOMU, 農業情報研究, 農業情報研究, 12(4), 307 - 314, Dec. 2003 , Refereed
    Summary:A computer program for analysis of agricultural production in greenhouses was developed. This search tool analyzes a greenhouse's environmental data measurements and past plant production data to identify major factors influencing daily production, and to isolate those factors' period of influence. A prediction model for daily production based on a topological case-based modeling (TCBM) algorithm was also constructed. Stepwise multiple regression analysis was employed to choose major factors for the daily production amount prediction model. Results from the search application can be presented using 3D graphs so that program users can understand the relationship between environmental factors and daily production. A test was performed using data from a tomato production greenhouse (approx. 3000 m2 floor area). The search tool identified the major factors as working hours on harvest day, average inside daily minimum air temperature from 7 to 8 days before the harvest day, average inside daily amount of solar radiation from 2 to 4 days before the harvest day, outside average daily amount of solar radiation from 8 to 11 days before the harvest day, and inside average daily difference in air temperature 6 days before the harvest day. The constructed model predicted daily tomato production amount with a relative error of about 30%.
  • EDIのための植物生産におけるXML情報交換規格の提案, HOSHI TAKEHIKO, SUZUKI TAKAFUMI, SHIOZAWA EICHI, KAMEOKA TAKAHARU, 農業情報研究, 農業情報研究, 12(4), 327 - 335, Dec. 2003 , Refereed
    Summary:To advance the computerization of plant production, all information related to a plant production was unified as a standard XML document. The proposed standard was named BIX-pp. To evaluate it, a set of information related to hydroponics spinach production in one Tokai University greenhouse was converted into sample BIX-pp data, and four kinds of BIX-pp correspondence application programs were made. Evaluation results confirmed that BIX-pp is capable of unifying all plant production information. Moreover, two application programs were developed and tested: a record converter, for converting CSV files into BIX-pp format; and a property editor, for editing the attribute information (cultivar, greenhouse, grower etc.) on plant production. To confirm the potential of BIX-pp, and to encourage its use by many people in more fields, the entire contents of the proposal were made available to the public at http://w3.fb.u-tokai.ac.jp/BIX-pp.
  • A Search for Major Factors Influencing on Cut Rose Production Using Past Daily Average Data and Predicting Production Using Topological Case-based Modeling., HOSHI TAKEHIKO, SUZUKI TAKAFUMI, UMEDA ATSUSHI, FUSE JUN'YA, TSUTSUI HIROAKI, 植物工場学会誌, 植物工場学会誌, 15(1), 20 - 26, Mar. 2003 , Refereed
    Summary:A plant production support system was developed to search for major factors influencing on plant production and to predict daily harvest. A case study on cut-rose production using rock -wool hydroponics was performed. Daily environmental measurement data and daily production records were recorded for 260 days on two kinds of splay roses and analyzed. The squared correlation coefficients between all the past averaged environmental data and the amount of daily production were calculated, and the coefficients were then visualized with 3-D graphs. Major factors having influence on the cut-rose production system were selected from the data with high correlation coefficients by step-wise multiple regression analysis and cluster analysis. In a testing greenhouse, four key factors were identified : the number of produced cut flowers from 1 to 2 days before the harvest day, the number of produced cut flowers from 37 to 55 days before the harvest day, the daily difference in inside air temperature from 27 to 49 days before harvest and the daily minimum inside air temperature from 50 to 85 days before harvest had influence on the number of produced cut flowers in the case of cultivar "Little Silver". A prediction model was constructed by topological case-based modeling (TCBM) using the chosen factors. The average error in predicted production was ±15.4 cut flowers day<SUP>-1</SUP> (±28.5%). In the case of cultivar "Fantasy", the average error of the predicted production was ±14.7 cut flowers day<SUP>-1</SUP> (±23.2%). The process of identifying the major factors might be a useful method to identify the characteristics of plant production in an individual greenhouse. The computerized prediction model of daily harvest would help growers to promote business and trade to their advantage.
  • An Environmental Control System Based on the Decentralized Autonomous Control., HOSHI TAKEHIKO, HAYASHI YASUMASA, YOKOI SHINGO, HASEGAWA TOMOYUKI, KOZAI TOYOKI, 植物工場学会誌, 植物工場学会誌, 14(3), 157 - 164, Sep. 2002 , Refereed
    Summary:An environmental control system proposed here was named the decentralized autonomous production management system (DAPMS). It was constructed based on the idea that each plant individual itself could require the desirable environment to the plant production equipments and growers to attach small computer chips. In the DAPMS, each plant individual is an element whose production state and goal are known. A potential function based on this information expresses how well the goals of each element are satisfied. The global discipline in the DAPMS was kept using the potential function in each plant individual. A simulation model of the DAPMS was developed to test this idea. In the simulation, different parts of the growing room were characterized by different environmental variables to reflect the situation in a real transplant production facility. Each plant individual was moved (for example, by a robot) to the place within the growing room that was best suited for its growth. A reasonable arrangement of the plant individuals was obtained by the DAPMS, even when changes were made in the scale of the facility, the number of plants, and other variables. The DAPMS was applied to cell tray production of sweetpotato transplants in a closed-type transplant production system. Even though the growing room had uneven environmental conditions and a variety of transplant individuals, the DAPMS was able to provide a desirable environment to the transplant individuals and to produce transplants with a uniform number of leaves.
  • Design concepts of computerized support systems for large-scale transplant production, T.Hoshi, Yasumasa Hayashi, Toyoki Kozai, Kluwer academic publishers, Transplant Production in the 21st Century, Kluwer academic publishers, Transplant Production in the 21st Century, 38 - 43, Oct. 2000 , Refereed
  • 環境計測制御システムを利用して気温の栽培好適性を図示するソフトウェアの開発, SHINODA TSUMUGU, HOSHI TAKEHIKO, 農業情報研究, 農業情報研究, 9(1), 35 - 42, Jun. 2000 , Refereed
  • A standard Operation Protocol on the Environmental Measurement and Control Systems Aiming at Promoting Development of Computer Software for Remote Measurement, Control and Analysis of Greenhouse Environment., HOSHI TAKEHIKO, FUSE JUN'YA, WATANABE TSUTOMU, OKUYA TSUYOSHI, HAYASHI YASUMASA, KURASHIMA TOSHIYUKI, 植物工場学会誌, 植物工場学会誌, 11(3), 157 - 164, Sep. 1999 , Refereed
    Summary:Computerized environmental measurement and control systems for greenhouses have been developed and used in Japan since 1974. In 1995, 2566 sets such systems operated for protected plant production in Japan, and the total floor area of computer controlled greenhouses was 3.44 km<SUP>2</SUP>. The selling systems of more than 20 corporations could not be operated by the same software in the personal computers connected with the systems, because the systems do not have the common remote operation standard from personal computers. We realized that a more convenient measurement and control for advanced plant production is indispensable to develop advanced software in personal computers. Allowing remote operation of any systems by the same software decreases software development costs and increases the usefulness of the systems and software developers. Therefore, we proposed a standard operation protocol for the environmental measurement and control systems. The standard operation protocol was determined by the following process; (1) A questionnaire research, (2) Testing by a prototype system, (3) Hearing from concerned makers, and (4) Verification of the protocol practicality. Elements of the standard operation protocol were (1) Transferal standardization, (2) Identical standardization, and (3) Semantic standardization. The primary concepts to perform the protocol functions were a virtual controller and a map file. The virtual controller permitted the realization of the protocol by only emulating software. The map file worked unification and localization of measurement and control items easily. The practicality of the standard operation protocol was confirmed by verification tests. It is considered that standard operation protocol contributes to promote development of personal computer software for remote measurement, control, and analysis of the greenhouse environment.
  • Factor Analysis of Evaluations on the Exercise in Computer Literacy by the Students in the School of High Technology for Human Welfare, TANAKA Akio, ARAI Masahiko, MATSUSHITA Hiroaki, HOSHI Takehiko, KAGEYAMA Yoshiyuki, KOBAYASHI Yosihiro, YAMAMOTO Koichi, The Bulletin of School of High-Technology for Human Welfare, Tokai University, The Bulletin of School of High-Technology for Human Welfare, Tokai University, 8, 49 - 58, Mar. 1999 , Refereed
    Summary:Contemporary society is information-oriented. It is important to acquire computer literacy not only for studying in a university but also for working in a company after graduation. The syllabus for the exercise in computer literacy has been the same for all four departments in the ,School of High Technology for Human Welfare in Tokai University since 1997. All resident lecturers give newly enrolled students the exercise, which is a closely packed series. To evaluate the effect of the exercise, questionnaires are distributed to all of the students. The questionnaires are analyzed by the principal component analysis of the correlation matrix of the normalized characteristics. As a result, three main factors are extracted, which are related to how to teach, the syllabus and how to learn in order of weight. These factors are generally thought to play an essential role in the exercise. The students need continuously to brush up their skills in computer literacy after the exercise. As Internet use increases, teaching the network etiquette (netiquette) becomes more important in the exercise.
  • Visualization System of Environmental Information on Internet, HONJO Tsuyoshi, HOSHI Takehiko, TAKEUCHI Shinya, FUSE Junya, Journal of The Japanese Institute of Landscape Architecture, Journal of The Japanese Institute of Landscape Architecture, 60(5), 611 - 614, Mar. 28 1997 , Refereed
    Summary:In the present study, prototype of environmental information system using Internet or Internet protocol was developped. The distribution of the data using the protocols or software of Internet is preferable instead of conventional communication software or fax, considering the widespread availability of Internet. The diagram of the system is shown in Fig. 1.
    One of the functions of the system was data transfer by mail. Software for data transfer from data acquisition computer to WWW system by E-mail was developped using PPP and SMTP. By this method, data acquisition was made possible in the area where LAN is not constructed.
    Another function was data distribution by WWW and 3D visualization on WWW. WWW server was made and terrain rendering software with CGI scripts were developped for the 3D visualization. Landsat data or meteorological data like temperature, relative humidity are overlaid with digital elevation model and 3D images were shown on the home pages.
  • Development of an Irrigation Mobile Robot for Soil Water Control to Individual Plants., HAYASHI YASUMASA, HOSHI TAKEHIKO, 植物工場学会誌, 植物工場学会誌, 7(4), 204 - 209, Dec. 1995 , Refereed
    Summary:An irrigation mobile robot was developed and tested for saving labor and automatic soil water control.<BR>The robot was consisted of a running unit, a control unit and an irrigation unit. Soil moisture was measured by the electrical resistance sensor which was attached to the mobile arm with irrigation nozzle. The infrared reflectors which were recognized by the infrared sensors of the robot indicated the measurable and irrigable positions of individual plants. The robot was programmed to repeat following operations : <BR>1. Move the robot to the position of the infrared reflector;<BR>2. Insert the soil moisture sensor into the soil, and measure the soil moisture;<BR>3. If the measurement value of the soil moisture was less than the value of satisfied soil moisture, then irrigate the soil.<BR>The result of performance tests showed that the robot could control the soil moisture near by individual plants automatically. It was estimated that 4 sets of the robot could control the soil moisture in greenhouse muskmelon cultivation having 1000 m<SUP>2</SUP> floor area.
  • Growth Promotion of Spinach in Nutriculture by Addition of Sodium Chloride to Nutrient Solution., MIMURA SO, HOSHI TAKEHIKO, TAKATSUJI MASAMOTO, 植物工場学会誌, 植物工場学会誌, 7(3), 151 - 155, Sep. 1995 , Refereed
    Summary:It was cleared that the growth of spinach which was cultivated in the nutriculture by addition of sodium chloride was better than no sodium chloride growth. In the case of 2.527 kg/m<SUP>3</SUP> sodium chloride addition was superlative growth in the experiment. The spinach top flesh weight in the case at 29 days after sowing was heavier than top flesh weight of control spinach by 3.58 g/plant.
  • Plant Growth Experiment Using Visible Light-Emitting Diodes., TAKATSUJI MASAMOTO, TSUJI TAKAYUKI, SEKI YOSHINORI, HOSHI TAKEHIKO, 植物工場学会誌, 植物工場学会誌, 7(3), 163 - 165, Sep. 1995 , Refereed
    Summary:A plant growth experiment using high-intensity visible light-emitting diodes was carried out for lettuce by changing the red/blue ratio (<I>R</I>/<I>B</I>). The result showed that the growth for <I>R</I>/<I>B</I>=10 was the largest compared with <I>R</I>/<I>B</I>=5 and 20 cases for both fresh and dry weights, and even more favorable than the growth under metal-halloid lamps.
  • Application of Plant Growth Image for Interface of Environmental Control System and Their Users., HOSHI TAKEHIKO, TAKIGUCHI TAKESHI, TAKATSUJI MASAMOTO, 植物工場学会誌, 植物工場学会誌, 7(1), 1 - 6, Mar. 1995 , Refereed
  • Continuous measurement of movement in spinach leaves using video cameras, Takehiko Hoshi, Takeshi Takicuchi, Journal of Agricultural Meteorology, Journal of Agricultural Meteorology, 51(2), 123 - 130, 1995 , Refereed
    Summary:Leaf movement together with growth of vegetables was continuously measured by two video cameras and a three-dimensional image processing system. In the experiment, the leaf movement of spinach (Spinacia oleracea L. cv. “Lead”) from 10 to 24 days after seeding in two different photosynthetic photon flux densities (PPFD) was observed. A diurnal movement in spinach leaves was observed of both high and low PPFD. Spinach folded all the leaves in the dark period and spread the leaves in the light period. The amplitude of the diurnal movement showed a tendency to increase with high PPFD and increasing growth of the leaf blade. An irregular falling-rising movement due to infirm growth and a periodical swing movement with 3 hours on several leaves was also observed at low PPFD. It is considered that the physiological condition of spinach affects the kind and amplitude of the movement. The experimental results indicate that the measurement of the movement is a possible method to monitor vegetable growth in environmental control systems. © 1995, The Society of Agricultural Meteorology of Japan. All rights reserved.
  • Development of plant transportation system for automated plant factories., HOSHI TAKEHIKO, TAKATSUJI MASAMOTO, OKANO TOSHIAKI, SEKIYAMA TETSUO, 植物工場学会誌, 植物工場学会誌, 5/6(2/1), 15 - 22, Mar. 1994
    Summary:A plant transportation system for increasing growing space was developed and its performance was tested for a year in a plant factory having 8 hydroponic beds. The system consisted of movable cultivation baskets, a basket carrier and two basket pushers. The hydroponic bed which is 37. 2 m length by 2. 0 m width in size had capacity for the admission of 45 baskets. The basket was planted with 860 plants at the maximum. The baskets were suspended on the both longer edges of the bed with wheels. The carrier which is a microcomputer-controlled electric car carried 2 baskets to the working space on a side of the bed automatically. The pusher pushed out the baskets by an oil pressure cylinder after planting or spacing or harvesting in the working space.<BR>The plant transportation system performed well in the plant factory. A set of developed the system could manage 19000 plant·day<SUP>-1</SUP> spinach production of 1640 m<SUP>2</SUP> plant growing space in 8 hour·day<SUP>-1</SUP> working hours. The results of practical test suggested that the 95% of floor area was available for plant growing space.
  • Fundamental Study on Production Support Systems for Plant Factories, HOSHI Takehiko, Chiba University, Chiba University, 1 - 109, Jan. 1994 , Refereed
  • 図形と言葉で制御方法を表現した拡張ファジイ環境制御の基礎的検討, HOSHI Takehiko, 農業気象, 農業気象, 47(4), 99 - 104, Mar. 1992 , Refereed
  • Object-Oriented Software Development Support System of Environmental Controllers in Plant Growth Factories., HOSHI TAKEHIKO, 植物工場学会誌, 植物工場学会誌, 3(2), 129 - 136, Mar. 1992 , Refereed
  • Change in the Composition of Hydroponic Nutrient Solution Exposed to Light and its Effect on Vegetables Growth, Takehiko Hoshi, Toshiaki Okano, Hitoshi Terazoe, Toshikazu Yoshihara, Hiroshi Saiki, Journal of Agricultural Meteorology, Journal of Agricultural Meteorology, 45(2), 99 - 104, 1989 , Refereed
    Summary:Nutrient solution in hydroponics is usually covered with the shading material, plate or film. A hydroponic vegetable production system which uses a movable vegetable supporting mechanism for varying the space among vegetables according to the growth stage, called “spacing”, was developed. For easy spacing, it is desirable not to use the shading material on the nutrient solution. Then, the nutrient solution is exposed to the light. There are a number of unclarified points concerned with the effects of the lighted nutrient solution on vegetables growth. Two experiments were performed. In experiment 1, to observe the effects on vegetables growth, spinach (Spinacia oleracea) and Senpoh-sai (Brassica x hybrida) were planted in two hydroponic beds. One bed was covered with the shading plate to keep the nutrient solution dark, and the other bed was not covered to expose the solution to the light. In experiment 2, to investigate hourly changes of the composition of the nutrient solution, the nutrient solution was illuminated with white fluorescent lamps. The top fresh weight of spinach 17 days after transplanting to the lighted nutrient solution decreased to 36% of the control. The primary cause of vegetable growth inhibition was considered to be iron deficit induced by changing of soluble iron (EDTA-Fe) into insoluble one (FePO4). 94% of soluble iron in the nutrient solution under the lighting intensity of 240 μmol/m2/sec changed into insoluble iron for 42 hours. When the lighting intensity in the nutrient solution is reduced to 11.8 μmol/m2/sec by shading, the change of soluble iron into insoluble one is controlled at 5% increase per day compared with case of quite dark condition. These results will provide clues for studying on soluble iron condition of nutrient sterilization using ultra violet lay and tissue culture medium of a transparent vessel. © 1989, The Society of Agricultural Meteorology of Japan. All rights reserved.
  • Development of hydroponic system and adaptation of microcomputers for a commercial size vegetables factory, T.Okano, T.Hoshi, H.Terazoe, Acta Hort., Acta Hort., 230, 343 - 348, Sep. 1988 , Refereed
  • Vegetable growth and energy consumption in a vegetable factory using off-peak electricity, Okano,T, Hoshi,T, Sekiyama,T, Acta Hort., Acta Hort., 229, 353 - 359, Jun. 1987 , Refereed
  • 制御式を用いたマイクロコンピュータ環境制御装置の開発, 星 岳彦, 古在 豊樹, 農業気象, 農業気象, 42(1), 45 - 50, Jun. 1986 , Refereed
  • Knowledge-Based and Hierarchically Distributed Online Control System for Greenhouse Management, Takehiko Hoshi, Toyoki Kozai, Acta Hort., Acta Hort., 148, 301 - 308, Refereed
  • Development of a remote environmental monitoring and control framework for tropical horticulture and verification of its validity under unstable network connection in rural area, Andri Prima Nugroho, Takashi Okayasu, Takehiko Hoshi, Eiji Inoue, Yasumaru Hirai, Muneshi Mitsuoka, Lilik Sutiarso, COMPUTERS AND ELECTRONICS IN AGRICULTURE, COMPUTERS AND ELECTRONICS IN AGRICULTURE, 124, 325 - 339, Jun. 2016 , Refereed
    Summary:This study focuses on the development and evaluation of a remote field environmental monitoring and control framework, implementing a local-global management strategy to overcome the unstable network connection in the rural area. The framework consists of environmental monitoring and control node as the local management subsystem (LMS), and the web data providing and system management as the global management subsystem (GMS) to establish a simple and flexible remote environmental monitoring and control based on a cloud platform. The supporting features are online and offline environmental monitoring, synchronization of system configuration, actuation, and offline management. Two field tests were conducted to verify its performances and functionalities, (1) environmental monitoring on tropical horticulture cultivation in Yogyakarta, Indonesia, and (2) implementation of the monitoring and control for automatic drip irrigation control based on soil moisture content for tomato. As the result of the first test, the developed framework could help to maintain the sustainability of environmental monitoring under unstable network connection over 80% availability of the data with local offline measurement up to 24% of the total entries. From the second test result, the framework could support the real-time monitoring and control of soil moisture content as well as increase the system flexibility in the adjustment of the system configuration remotely. The control system has 0.78% error (E) and 99.2% in-range soil moisture content (L < x(t) < U) measurement during the 10-days observation. We concluded that the proposed framework might become a useful tool for a simple remote environmental monitoring and control under unstable network connection in the rural area. The framework has the potential to be adopted in cloud-based tropical horticulture supporting system, aimed for long-term environmental monitoring and controlling local facilities. (c) 2016 Elsevier B.V. All rights reserved.
  • Development of a Nondestructive Measurement System to Obtain Exuberance Index of Foliage during Greenhouse Crop Growth by Low-Cost Near-Infrared Light Sensors, T. Hoshi, K. Suzuki, J. Imahara, K. Yasuba, T. Nanseki, INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013, INTERNATIONAL SYMPOSIUM ON NEW TECHNOLOGIES FOR ENVIRONMENT CONTROL, ENERGY-SAVING AND CROP PRODUCTION IN GREENHOUSE AND PLANT FACTORY - GREENSYS 2013, 1037, 627 - 634, 2014 , Refereed
    Summary:A nondestructive measurement system for continuously counting the average number of leaf layers (ANL) of a crop canopy was developed to evaluate the vegetative growth instead of the leaf area index (LAI). A virtual near-infrared light sensor with a peak between 700 and 800 nm was developed by calculating the difference in electrical current outputs of two low-cost Si photodiodes for detecting visible light and visible plus near-infrared light. Two virtual sensors were placed on the top and bottom of the crop canopy each, and apparent ANL as the value of the light path length was calculated from the measured values using the Beer-Lambert Law. The far red light transmittance of the leaves of most greenhouse fruit vegetables is approximately 60%. The ANL may be measured in up to approximately six leaves when a near-infrared light sensor with a 13.3 dB dynamic range is used. To measure more accurately the amount of received light from leaves that spreads in various directions, the virtual sensor was covered by a diffusion hemisphere made from a half of a Ping-Pong ball. The sensing system was installed in a device based on a ubiquitous environment control system (UECS), a type of decentralized autonomous computer measurement and control system for crop production in greenhouses. The measurement system was located and tested in muskmelon, cucumber, and tomato production greenhouses in Japan. The calculated ANL from measured daily cumulative optical sensing data for muskmelons was highly correlated (R-2=0.90) with LAI obtained manually. The correlation between ANL and LAI of the other tests was relatively high.
  • Effect of the Supplemental Lighting on the Growth of Young Plants in Second Nursery in Tomato, K. Suzuki, K. Yasuba, M. Takaichi, T. Takahashi, T. Hoshi, VI INTERNATIONAL SYMPOSIUM ON LIGHT IN HORTICULTURE, VI INTERNATIONAL SYMPOSIUM ON LIGHT IN HORTICULTURE, 907, 269 - 276, 2011 , Refereed
    Summary:The system for producing many transplants in a narrow space is necessary for low node-order pinching and high planting density cultivation. Excessive elongation of stem usually happens in high density tomato transplants during nursery stage, so the control of the plant height is necessary. We researched the effect of supplemental lighting on the growth of young plants on the second nursery. Tomato seedlings were grown in the closed nursery system using fluorescent lamps for 28 days after sowing. Seedlings transferred to the second nursery system on 17 November 2008. This system is the NFT system to which the root zone of each plant was limited separately by root barrier sheet, and plants were arranged in 12.5x 12 cm spacing. The young plants were grown in this system for 2 weeks with supplemental lighting using ceramic metal halide lamps, with shading, and without shading and supplemental lighting. Some plants were arranged in 25x24 cm (low density plot). The dry matter weight of plants increased with supplemental lighting, but plant height did not chang. The height of plants was short in low density plots. Then, the effect of differences of light source on plant growth was researched. Red LED lighting reduced the stem elongation compared with the control. On the other hand, blue LED lighting increased the stem elongation a little. After second nursery, some nursery plants were grown in the NFT hydroponics system with third truss pinching and high planting density cultivation (6.25 plants m(-2)). However, the yields were the same among the plants that had undergone different processing in second nursery. The supplemental lighting during second nursery was effective to increase dry weights of shoot and root, and red LED lighting was effective to suppress the plant height, and to facilitate the transplant work, but little effective to increase fruit yield.
  • Effects of Supplemental Lighting on the Quality of Tomato Seedlings Raised in Greenhouses, T. Hoshi, H. Higa, K. Goto, K. Niibori, VI INTERNATIONAL SYMPOSIUM ON LIGHT IN HORTICULTURE, VI INTERNATIONAL SYMPOSIUM ON LIGHT IN HORTICULTURE, 907, 117 - 123, 2011 , Refereed
    Summary:High-quality seedling supply is essential for the production of tomatoes in greenhouses using high density (5 plants per m(2)) and continuous planting (8 cycles per year) with double-tiered beds and cultivation until the fourth truss, compared to the conventional case of annual planting until higher truss harvest. In this study, the seedling period from seed germination to fixed transplant size was divided into two stages. Seedlings were then placed into an artificial weather room with fluorescent lamps and then into a greenhouse with natural light until the seedling reached transplant size. In the latter periods of growth, the quality of the seedling deteriorated due to weak natural light in the rainy and winter seasons. Thus, a ceramic metal halide lamp (150 W 4,300 K) used for outdoor signboards that was able to uniformly illuminate a horizontal surface was attached to the greenhouse eaves to avoid the formation of shaded areas. A computerized lighting control system was also implemented to compensate for the PPF fluctuation of the natural light. The average PPF on the plant canopy was increased to 94.0 mu mol m(-2) s(-1) using supplemental lighting, and the input electric power density was 166 W m(-2). The planting density during this period was 108.6 plants m(-2) and the experiments were repeated four times. The average supplemental lighting time was 6.30 h d(-1). We found that the cumulative PPF on the plant canopy was increased by 33% using supplemental lighting, and its daily coefficient of variance (CV) was improved from 53 to 29%. The top dry weight of the seedling was increased from 17 to 35%, while the total plant height tended to be short. Supplemental lighting during the cultivation period also improved the quality of the tomato seedlings. The average total cost of supplemental lighting was 17.3 yen per seedling.
  • A daily harvest prediction model of cherry tomatoes by mining from past averaging data and using topological case-based modeling, T Hoshi, T Sasaki, H Tsutsui, T Watanabe, F Tagawa, COMPUTERS AND ELECTRONICS IN AGRICULTURE, COMPUTERS AND ELECTRONICS IN AGRICULTURE, 29(1-2), 149 - 160, Oct. 2000 , Refereed
    Summary:A daily harvest prediction model for an individual plant production system is proposed. The model is based on data mining and topological case-based modeling. Environmental measurement data that was logged by an environmental control computer in a greenhouse, daily working hours and daily harvest records were averaged for each period. Each averaged data was correlated with harvest on the object day. The calculated squared correlation values were visualized with the 3D graphs. The graphs helped to understand the relationship between the daily harvest and each factor that influenced the harvest. The model was applied to a greenhouse for producing cherry tomatoes. Four variables, which were harvest in the past, the numeric code of the day of the week, total working hours and daily difference of air temperature. were chosen for developing the predicting model in the data mining process. The chosen data was quantized and placed on the case-base cells in the computer memory. The topological case-based modeling used the principle of continuous mapping to predict the daily harvest. The least error of the predicted yield by the developed model was +/- 31 kg day(-1) (26%) in the greenhouse. (C) 2000 Elsevier Science B.V. All rights reserved.
  • Intelligent information systems for production management in agriculture and horticulture, Toyoki Kozai, Takehiko Hoshi, Future Generation Computer Systems, Future Generation Computer Systems, 5(1), 131 - 136, 1989 , Refereed
    Summary:Some ideas on how to integrate recent rapid technical advances in computer application, biotechnology, and natural energy utilization are proposed. Then, outlines are described of (1) a hierarchically distributed knowledge-based information system for controlling a greenhouse complex, (2) an expert system development software system: MICCS, and (3) a tomato crop disease diagnosis expert system developed using MICCS. © 1989.
  • Development Of A Microcomputer-Based Environment Control System Using The Control Expression, Takehiko Hoshi, Toyoki Kozai, Journal of Agricultural Meteorology, Journal of Agricultural Meteorology, 42(1), 45 - 50, 1986 , Refereed

Books etc

  • The latest agricultural technology -ornamental plants- vol.12, Takehiko Hoshi, Rural Culture Association Japan, Joint author, Smart greenhouse horticulture by environmental measurement and control, Rural Culture Association Japan,   2020 03 20 , 9784540190599
  • New smart agriculture, HOSHI Takehiko, Joint editor,   2019 05 , 9784897324074
  • Postharvest Engineering Dictionary, HOSHI Takehiko, Contributor, ICT, DO, EC, Asakura Books,   2019 01 , 9784254410396
  • Automation in Agriculture - Securing Food Supplies for Future Generations, HOSHI, Takehiko, Joint author, Ubiquitous Environment Control System: An Internet-of- Things–Based Decentralized Autonomous Measurement and Control System for a Greenhouse Environment, IntechOpen (DOI: 10.5772/intechopen.71661),   2018 03 , 9789535138730
    Summary:A low-cost and flexible system for environmental measurement and control in greenhouses based on decentralized autonomous technics, Ubiquitous Environment Control System (UECS), was proposed in 2004. The UECS is composed of autonomous nodes as the minimum units of measurement and control. The nodes can connect with each other through Ethernet or Wi-Fi and can communicate information regardless of manufacturer or model. To realize automation and efficiency of protected horticultural production, two consortia for UECS development and extension were established. During the last 10 years, the UECS has been used to apply environment control in large-scale greenhouses and plant factories. The stability and utility of the UECS have been demonstrated and verified in these practical cultivations. Current research and development are being carried out to install information and communication technology (ICT) systems to improve productivity in existing small- to medium-scale greenhouses in Japan. The flexibility and concept of the UECS have been very effective to enable sophisticated environmental control technology to be applied to small- and medium-scale greenhouses. In this chapter, self-fabricated UECS, the renewal of old environmental control systems using the UECS, and Sub-GHz radio band use for communicating UECS nodes among distributed greenhouses are discussed.
  • スマート農業(農業情報学会編), HOSHI Takehiko, Joint editor, 施設園芸・植物工場のスマート化 pp.170-171, 農林統計出版,   2014 08 , 9784897322995
  • よくわかる農業施設用語解説集, HOSHI Takehiko, Joint editor, 8章先端的計測・IT関係 pp.158-175, 筑波書房,   2012 09 , 9784811904085
  • Industrial of Agriculture(韓国語版), HOSHI Takehiko, Contributor, 施設園芸の高度化を目指すユビキタス環境制御システム pp.68-75, RGB press,   2011 04 , 9788996343172
  • 太陽光型植物工廠, HOSHI Takehiko, Contributor, 第6章 U化的環境控制系統, 豊年社,   2011 02 , 9789579157490
  • 植物工場大全, HOSHI Takehiko, Contributor, 施設園芸の高度化を目指すユビキタス環境制御システム, 日経BP社,   2010 08 , 9784822231200
  • 太阳光利用型植物工厂, HOSHI Takehiko, Contributor, 第6章 普及环境控制系統, 中国農業出版社,   2010 08 , 9787109137059
  • 植物工場とその照明技術, HOSHI Takehiko, Contributor, 第2章第3節 植物工場における制御技術, サイエンス&テクノロジー,   2009 12 , 9784903413778
  • 太陽光型植物工場, HOSHI Takehiko, Contributor, 第6章ユビキタス環境制御システム, オーム社,   2009 11 , 9784274067877
  • 植物工場ビジネス戦略と最新栽培技術, HOSHI Takehiko, Contributor, 第2章第3節 植物工場における制御技術, 技術情報協会,   2009 09 , 9784861042966
  • 次世代センサハンドブック, HOSHI Takehiko, Contributor, II編10章農業システム10.3植物生体計測, 培風館,   2008 07 , 9784563067687
  • 新農業気象・環境学, HOSHI Takehiko, Contributor, コンピュータ支援システム, 朝倉書店,   2005 06
  • 新編 農学大辞典, T. Hoshi, Contributor, 情報ネットワークの活用, 養賢堂,   2004 03
  • 新農業環境工学, HOSHI Takehiko, Contributor, コンピュータ工学, 養賢堂,   2004 03
  • 新農業情報工学, HOSHI Takehiko, Contributor, 自律分散システム, 養賢堂,   2004 03
  • 五訂施設園芸ハンドブック, HOSHI Takehiko, Contributor, 第Ⅶ部 施設園芸とIT(情報利用技術)・第1章 IT利用による施設園芸の展開, 園芸情報センタ,   2003 03
  • 食品加工の新技術, HOSHI Takehiko, Contributor, 植物工場(第17章, シーエムシー,   2000 11
  • 農業情報化年鑑2000, HOSHI Takehiko, KATAGIRI Anna, Contributor, 農業インターネット動向, 農文協,   2000 03
  • 農業における新しい情報化技術, HOSHI Takehiko, Contributor, 第2章農業におけるインターネット利用, 農業電化協会,   2000 03
  • 閉鎖型苗生産システムの開発と利用, 古在豊樹, 星岳彦, Contributor, 14章閉鎖苗生産システム・基本モジュールの概念設計, 養賢堂,   1999 10
  • 農業情報化年鑑1999, HOSHI Takehiko, Contributor, 施設環境計測制御システム pp.72-75, 農文協,   1999 01
  • 農業情報化年鑑1998, HOSHI Takehiko, Contributor, )施設環境計測制御システム pp.68-72, 農文協,   1998 10
  • 四訂施設園芸ハンドブック, HOSHI Takehiko, Contributor, 第1章 コンピュータによる施設園芸の展開/第2章 インターネットの利用 pp.230-233, pp.256-261, 園芸情報センタ,   1998 03
  • 新農業経営ハンドブック, HOSHI Takehiko, Contributor, 農村の情報化, 社団法人全国農業改良普及協会,   1998 03
  • 植物工場ハンドブック, HOSHI Takehiko, Contributor, 7章周辺技術と未来技術、コンピュータの高度利用、pp.235-241, 東海大学出版会,   1997 12
  • 新編農業気象用語解説集, HOSHI Takehiko, Joint editor, 統計・情報処理、予測・予報、pp.217-244, 日本農業気象学会,   1997 06
  • 農業情報化年鑑1997, HOSHI Takehiko, Contributor, 施設環境計測制御システム pp.88-91, 農文協,   1997 01
  • 生物生産機械ハンドブック, HOSHI Takehiko, Contributor, 14編5章工場的生産方式5.1野菜の工場的生産機器装置、pp.947-949, コロナ社,   1996 02
  • 農業情報化年鑑1996, HOSHI Takehiko, Contributor, 栽培技術面での活用 pp.76-79, 農文協,   1996 01
  • 生物環境調節ハンドブック, HOSHI Takehiko, Contributor, 応用的ソフトウエア pp.390-394, 養賢堂,   1995 04
  • 農業情報化年鑑1995, HOSHI Takehiko, Contributor, 栽培技術面での活用 pp.64-67, 農文協,   1995 01
  • 三訂 施設園芸ハンドブック, HOSHI Takehiko, Contributor, 遠隔制御ネットワークシステム pp.296-300, (社)日本施設園芸協会,   1994 03
  • 花の成型苗生産と利, HOSHI Takehiko, Contributor, コンピュータ制御温室 pp.74-77, 誠文堂新光社,   1993 10
  • 農業技術大系野菜編, HOSHI Takehiko, Contributor, エキスパートシステムの応用 12卷、pp.9-16, 農文協,   1993 09
  • ウルトラマン研究序説, HOSHI Takehiko, Joint author, 科特隊の技術開発思想と「人工・仮想環境システム」, 中経出版,   1991 12 , 4806105600
  • Design Concepts of Computerized Support Systems for Large-scale Transplant Production, Transplant Production in the 21st Century,   2000
  • Artificial Intelligence in Agriculture 1998, PERGAMON(Elsevier),   1998
  • Plant Factories for Seedling Production,   1993
  • High-Tech. Agricultural Handbook,   1992
  • Bio-Expert systems,   1991
  • Neofarm = Vegetable Factory =,   1988
  • Agricultural Consultation System, Information Science Co.,   1985

Conference Activities & Talks

  • History, Current Situation and Issues of sensing and AI Application on Commercial Crop Production in Greenhouses, Takehiko Hoshi, 2020 IEICE General Conference,   2020 03 19 , 招待有り
  • Possibility of applying deep learning model for greenhouse environment prediction, Takehiko Hoshi, Asuna Mastuura, Ayane Mokumi, International Symposium on Agricultural Meteorology 2020 (ISAM2020),   2020 03 17
  • Development of a Low-cost UECS Nutrient Controller for Elevated Hydroponic Beds in Strawberry Production by Arduino CPU board, HOSHI Takehiko, SUZUKI Mikiya, 2019 JSABEES annual conference in Chiba,   2019 09 20
  • Investigation of communication networking protocol for UECS using IM920 and its validity, Nayeen Al Amin, Takashi Okayasu, Masafumi Horimoto, Takehiko Hoshi, Eiji Inoue, Yasumaru Hirai, Muneshi Mitsuoka, JSAI annual congress in 2018,   2018 05 17
  • Discussions to introduce UECS to middle or small-scale greenhouses in Kanagawa pref., A. Kitabatake, R. Tamura, Y. Masuda, T. Matsumura, H. Matsuda, T. Takiguchi, A. Takada, A. Koizumi, M. Kimura, A. Matsuyoshi, K. Takebayashi, T. Hoshi, Y. Takikawa, JSAI annual congress in 2018,   2018 05 17
  • Demonstration experiment of strawberry hydroponic cultivation of DAS based multi-environmental control system by arduino low-cost UECS, T. Hoshi, Y. Takikawa, M. Sakamoto, Y. Toita, K. Kobayashi, K. Yasuba, Y. Yoshida, T. Goto, H. Kurosaki, T. Okayasu, JSAI annual congress in 2018,   2018 05 17
  • Upgrading of control logic development tool for UECS, Hideto Kurosaki, Hiroyasu Toita, Kazuharu Kobayashi, Takehiko Hoshi, JSAI annual congress in 2018,   2018 05 17
  • Developmet of Arduino compatible MPU circuit board for UECS, Hideto Kurosaki, Takehiko Hoshi, Ken-ichiro Yasuba, Hiroyasu Toita, JSAI annual congress in 2018,   2018 05 17
  • Development of mobile Spectrometer by Digital Fabrication Techniques and Trial to Apply Multipoint Continuous Spectroscopic Analysis of Light Environment in Greenhouse Tomato Canopy, Takehiko Hoshi, Kenta Ueda, Yoshihiro Takikawa, Takaya Azuma, 2017 CIGR World Workshop in Matsuyama,   2017 09 03
    Summary:A low-cost spectrometer composed MEMS sensor and open source hardware (Arduino) for plant production was designed and manufactured applying digital fabrication techniques. The estimated material cost was 30,000 JPY per set when we manufactured 5 sets. The spectrometer was enclosed zelkoba’s leaf shape case (size: 171 x 100 x 36 mm) made of polylactic acid resin by 3D printer. The control software written in the Arduino sketch programing language measured photon flux (PF, unit: nmol m-2 s-1 nm-1) from 400 to 800 nm in each 1 nm every 5 minutes. The software also calculated PPF (400 to 700 nm) and PF of B (400 to 499 nm), G (500 to 599 nm), R (600 to 699 nm) and FR (700 to 800 nm). The obtained data was saved into a micro SD memory card by CSV format. The spectrometer continuously operated for 3 days through the type B USB micro connector if one 10 Ah mobile battery use. Four sets of the manufactured spectrometer were installed inside and outside of tomato canopy in the experimental greenhouse of Wakayama prefecture, and were able to measure spectroscopic PF for 9 days continuously. The value changes of phytochrome photoequilibrium and R/FR in tomato canopy were obtained as the example of the continuous spectroscopic analysis. The effect of pruning under leaves on the light environment inside the tomato canopy was quantified by calculation of LAI. We expect that the low cost and high mobility spectrometer will be used by grower in plant production fields.
  • Development of Spectroscopy Gadget for Plant Production by Digital Fabrication, Takehiko Hoshi, Annual Conference of Society of Japanese Agricultural Meteorology,   2017 03 30
  • Application of UECS platform for Japanese style protected horticulture of small scale and distributed greenhouses, HOSHI T, Yasuba K, Kurosaki H, Okayasu T, hoshi@hoshi-lab.net,   2016 05 19
  • 920MHz帯を使用したセンサーネットワークによる閉鎖型照明付培養棚の 環境分布測定, TADA Yuuya, TAKIKAWA Yoshihiro, HOSHI Takehiko, 日本農業気象学会近畿支部2015年度大会,   2015 12 05
  • ユビキタス環境制御システム製品同定コード(UECS-ID)管理システムの構築, HOSHI, Takehiko, Manami HASEGAWA, Ken-ichiro YASUBA, 日本生物環境工学会2015年宮崎大会,   2015 09 09
  • ICT活用によるスマート施設園芸・植物工場の構築, HOSHI TAKEHIKO, 公開シンポジウム「変動環境下における食糧生産と生物環境工学」、日本生物環境工学会2014年東京大会,   2014 09 , 招待有り
  • 家庭用人工光栽培器での連続明期がホウレンソウの成育に及ぼす影響, HOSHI TAKEHIKO, NOMURA TAKASHI, OGURA TERUYA, TAKIGAWA YOSHIHIRO, 日本生物環境工学会大会講演要旨,   2014 09
  • Present situation and prospects of UECS information platform in Japan, HOSHI Takehiko, APHPF 2014 the 5th China-Korea-Japan Joint symposium of Protected Horticulture and Plant Factory,   2014 05
  • Effectiveness evaluation on utilization of two snss in japan agriculture, Takashi Okayasu, Daisaku Arita, Andri Prima Nugroho, Takehiko Hoshi, Takashi Yoshinaga, Eiji Inoue, Yasumaru Hirai, Muneshi Mitsuoka, International Symposium on Machinery and Mechatronics for Agriculture and Biosystems Engineering (ISMAB),   2014 05
  • Development of a Nondestructive Measurement System to Obtain Exuberance Index of Foliage during Greenhouse Crop Growth by Low-cost Near-Infrared Light Sensors, T. Hoshi, K. Suzuki, J. Imahara, K. Yasuba, T. Nanseki, ISHS GreenSys2013,   2013 10 08 , 招待有り
  • 施設植物生産のスマート化に向けたICT活用の可能性, HOSHI Takehiko, 電気四学会関西支部講演会要旨、電子情報通信学会関西支部,   2013 09 13 , 招待有り
  • ユビキタス環境制御システムの低コスト化への方策, HOSHI TAKEHIKO, YASUBA KEN'ICHIRO, KUROSAKI SHUJI, OKAYASU TAKASHI, 日本生物環境工学会2013年度香川大会講演要旨、p.74-75,   2013 09 05
  • 施設園芸の環境計測制御情報化とスマートアグリコンソーシアムの活動, HOSHI Takehiko, 農業情報学会2013年度シンポジウム・オーガナイズドセッション・個別口頭発表講演要旨集(シンポジウム招待講演)、pp.69-70,   2013 05 , 招待有り
  • Establishments of Open Communication Platform and Business Consortium on the UECS Technology for Advanced Greenhouse Horticultural Production, T. Hoshi, K. Watanabe, K. Yasuba, Y. Shinohara, The 4th Korea-China-Japan Joint Symposium on Protected Horticulture and Plant Factory,   2012 11 15 , 招待有り
  • UECSに対応したAndroid用撮影・つぶやきアプリの開発, 大畑 亮輔, 星 岳彦, 渡邊 勝吉, 上田 正二郎, 安場健一郎, 南石 晃明, 林 真紀夫, 日本生物環境工学会2012年東京大会50周年記念大会講演要旨、p.28-29,   2012 09 05
  • UECS標準通信方式による作業情報統合化の提案, HOSHI Takehiko, UEDA Shoujiro, WATANABE Katsuyoshi, NANSEKI teruaki, 日本生物環境工学会2012年東京大会50周年記念大会講演要旨、p.26-27,   2012 09 05
  • 施設植物生産のグランド・デザインと情報利用, HOSHI Takehiko, 農業情報学会2012年度シンポジウム・オーガナイズドセッション・個別口頭発表講演要旨集、p.69-70,   2012 05 17 , 招待有り
  • UECS に対応した撮影・つぶやきアプリ用通信規格の策定, 星 岳彦, 大畑 亮輔, 渡邊 勝吉, 上田 正二郎, 安場 健一郎, 南石 晃明, 林 真紀夫, 業情報学会2012年度シンポジウム・オーガナイズドセッション・個別口頭発表講演要旨集、p.155-156,   2012 05 17
  • UECS に対応したAndroid 版ポケット環境モニタの開発, 大畑亮輔, 星岳彦, 南石晃明, 林真紀夫, 農業情報学会2012年度シンポジウム・オーガナイズドセッション・個別口頭発表講演要旨集、p.51-52,   2012 05 17
  • オープンプラットホームCPU基板Arduinoを用いた低コストUECS温室内気象ノードの試作, HOSHI TAKEHIKO, 日本農業気象学会全国大会講演要旨,   2012 03
  • 標準規格で記録された植物生産環境の着眼点提示ソフトウェアの開発, 大畑 亮輔, 山梨 竜一, 星 岳彦, 富士山麓アカデミック&サイエンスフェア2011予稿集,   2011 12
  • 施設植物生産におけるユビキタスセンシングとコントロール, HOSHI Takehiko, 電子情報通信学会ユビキタス・センサネットワーク研究会・ユビキタス・センサネットワークの実用化を目指した超分野シンポジウム資料 pp.16-24,   2011 10 , 招待有り
  • BIX‐ppに対応した植物生産環境の着目点印付けアプリケーションの開発, OHATA RYOSUKE, YAMANASHI RYUICHI, HOSHI TAKEHIKO, 日本生物環境工学会大会講演要旨,   2011 09
  • ユビキタス環境制御システムに対応した植物成育計測ノードの開発, HOSHI TAKEHIKO, KATO SHOTA, IMAHARA JUNGO, NANSEKI TERUAKI, 日本生物環境工学会大会講演要旨,   2011 09
  • 施設植物生産の情報化を推進するプラットホームの確立「農業クラウドコンピューティングと農業現場の情報デザイン」, HOSHI Takehiko, 農業情報学会2011年度シンポジウム・オーガナイズドセッション・個別発表講演要旨集,   2011 05 , 招待有り
  • ワンストップ高度施設園芸生産支援情報システムの開発, 星岳彦, 大畑亮輔, 渡邊勝吉, 大須賀隆司, 南石晃明, 農業情報学会2011年度シンポジウム・オーガナイズドセッション・個別発表講演要旨集 45-46,   2011 05
  • ユビキタス環境制御システムに対応した製品化補光ノードの開発, HOSHI TAKEHIKO, TSUCHIYA JIN, HAYASHI YASUMASA, NIIBORI KENJI, HIROSE ICHIRO, HAMAMOTO HIROSHI, SUZUKI KATSUMI, 日本農業気象学会全国大会講演要旨,   2011 03
  • 温室用ユビキタス環境制御システムの開発・普及, HOSHI TAKEHIKO, 日本農業気象学会全国大会講演要旨,   2011
  • Standardization of Information Exchange Platform for Achieving High-performance Protected Horticulture, HOSHI Takehiko, The 2nd Sino-Japan-Korea Symposium on Protected Horticulture and Environmental Control, Asian Working Group for Protected Horticulture and Environmental Control Congress (APHEC),   2010 10 , 招待有り
  • 電球型蛍光灯を用いた居住空間向け小規模低コスト野菜工場の提案, HOSHI TAKEHIKO, SHIBATA TAKAYASU, FUKAZAWA KAZUMASA, FUKAZAWA TOSHIO, TAKATSUJI MASAMOTO, 日本生物環境工学会大会講演要旨,   2010 09 08
  • ユビキタス環境制御システム(UECS)の計測制御情報の植物生産情報交換規格(BIX‐pp)形式への変換ソフトウェアの開発, HOSHI TAKEHIKO, HAYASHI YASUMASA, 日本農業気象学会全国大会講演要旨,   2010
  • トマト低段密植栽培2次育苗期において補光が生育に与える影響, TAKAHASHI TAKUYA, SUZUKI KATSUMI, YASUBA KEN'ICHIRO, TAKAICHI MASUYUKI, HOSHI TAKEHIKO, 園芸学研究 別冊,   2009 09 26
  • 簡易なモデル表記法による光環境シミュレータ, HAYASHI YASUMASA, TAKAICHI MASUYUKI, KURAMOTO HIROYUKI, KURAMOTO TSUYOSHI, HOSHI TAKEHIKO, 日本生物環境工学会大会講演要旨,   2009 09 06
  • 群落内補光のタイミングと照射時間が3段取りトマトの収量に及ぼす影響, HAMAMOTO HIROSHI, HOSHI TAKEHIKO, OJIMA KAZUSHI, YAMAZAKI KEISUKE, 日本生物環境工学会大会講演要旨,   2009 09 06
  • 施設植物生産のためのユビキタス環境制御システム, HOSHI TAKEHIKO, HAYASHI YASUMASA, 電子情報通信学会大会講演論文集,   2009 03 04
  • BS-12-3 A Ubiquitous Environmental Control System for Greenhouse Plant Production, Hoshi Takehiko, Hayashi Yasumasa, Proceedings of the IEICE General Conference,   2009 03 04
  • トマト苗の二次育苗における補光が苗質に与える影響, HOSHI TAKEHIKO, TOOYAMA HOMARE, NAKI YOICHI, HIGA HIROYUKI, GOTO KAKUSHI, NIIBORI KENJI, 日本農業気象学会全国大会講演要旨,   2009
  • ユビキタス環境制御システム解説用温室模型の開発, HOSHI TAKEHIKO, AIZAWA YOSHIAKI, SAITO YUKIHIRO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2009
  • ユビキタス環境制御システムにおけるノード間・システム間協調方式, HOSHI TAKEHIKO, SHINTANI KEIJI, HAYASHI YASUMASA, 日本生物環境工学会大会講演要旨,   2008 09 07
  • A communication protocol for collaboration among the measurement and control nodes in a decentralized autonomous environment control system of greenhouses, T.Hoshi, Y. Hayashi, K. Shintani, AALD AFITA WCCA 2008 World Conference on Agricultural Information and IT,   2008 08
  • 多段式生産施設における電球型蛍光灯を用いた補光がトマト生産に及ぼす影響, HOSHI TAKEHIKO, SHINMA KEITA, KAWAMURA FUTOSHI, GOTO KAKUSHI, SHIMBORI KENJI, 日本農業気象学会全国大会講演要旨,   2008 03 20
  • 情報化環境制御の目指すKAIZEN施設園芸生産の達成, HOSHI TAKEHIKO, 日本農業気象学会全国大会講演要旨,   2008 03 20
  • 高収益温室トマト生産を目指した分散型補光システムの設計, HOSHI TAKEHIKO, ARAMA KEITA, 日本生物環境工学会大会講演要旨,   2007 06 25
  • ユビキタス環境制御システムの通信を監視するソフトウェアの開発, ARAMA KEITA, KASAHARA AKIHIRO, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2007
  • ユビキタス環境制御装置を利用したハウス内の除湿制御法の検討, YASUBA KEN'ICHIRO, KUROSAKI HIDETO, HAYASHI YASUMASA, TAKAICHI MASUYUKI, KAWASHIMA HIROKI, SASAKI HIDEKAZU, KAWASAKI YASUSHI, OMORI HIROMI, NAKANO AKIMASA, NAKANO YUKA, SUZUKI KATSUMI, SAKAUE OSAMU, HOSHI TAKEHIKO, 園芸学会東海支部研究発表要旨及びシンポジウム資料,   2007
  • 分散型環境制御システムの通信互換性確保を目的としたデータ名称標準化, HAYASHI YASUMASA, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2007
  • ユビキタス環境制御システムに対応した温室監視ソフトウェアの改良, KUROSAKI SHUJI, YASUBA KEN'ICHIRO, TAKAICHI MASUYUKI, HAYASHI YASUMASA, HOSHI TAKEHIKO, SUZUKI KATSUMI, KAWASAKI YASUSHI, OMORI HIROMI, SASAKI HIDEKAZU, NAKANO YUKA, NAKANO AKIMASA, KAWASHIMA HIROKI, SAKAGAMI OSAMU, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2007
  • UECSによる分散型多系統培養液制御システムの設計と試作, SHINTANI KEIJI, HOSHI TAKEHIKO, TSUCHIYA KAZU, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2007
  • ユビキタス環境制御システムを利用した温室温度環境の予測制御, YASUBA KEN'ICHIRO, KUROSAKI HIDEHITO, HAYASHI YASUMASA, TAKAICHI MASUYUKI, SASAKI HIDEKAZU, HOSHI TAKEHIKO, 園芸学会雑誌 別冊,   2006 09 23
  • 植物生産情報記録規格(BIX‐pp)の応用ソフトウェア開発支援ツールの開発, ARAMA KEITA, SHIOZAWA EICHI, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2006
  • ユビキタス環境制御システムによるインテリジェント低コスト温室, HOSHI TAKEHIKO, 日本農業工学会シンポジウム,   2006
  • ユビキタス環境制御システムの実用規模施設への適用, HAYASHI YASUMASA, TAKAICHI MASUYUKI, YAMAGUCHI HIROAKI, AIHARA YUSUKE, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2006
  • 自律分散環境制御による送風ファン式細霧冷房ノードの開発, SHINTANI KEIJI, SATO YOSHINORI, EBINUMA KEN, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2006
  • 自律分散環境計測制御システムの施設園芸生産への展望, HOSHI TAKEHIKO, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2006
  • ユビキタス環境制御システムに対応した温室監視ソフトウェア, KUROSAKI SHUJI, HAYASHI YASUMASA, HOSHI TAKEHIKO, TAKAICHI MASUYUKI, OMORI HIROMI, 農業環境工学関連学会合同大会講演要旨集(CD-ROM),   2006
  • 温室自律分散環境制御システムの計測制御データ記録プログラムの開発, UCHINO HIROMI, HOSHI TAKEHIKO, 農業環境工学関連7学会合同大会講演要旨集,   2005 09 12
  • 温室自律分散環境制御システム用ユビキタスエンジンの開発, HAYASHI YASUMASA, UCHINO HIROMI, TAKAICHI MASUYUKI, AIHARA YUSUKE, YAMAGUCHI HIROAKI, HOSHI TAKEHIKO, 農業環境工学関連7学会合同大会講演要旨集,   2005 09 12
  • 温室自律分散環境制御ネットワークシステムの負荷解析, HOSHI TAKEHIKO, UCHINO HIROMI, FURUYA YOSUKE, 農業環境工学関連7学会合同大会講演要旨集,   2005 09 12
  • BIX‐ppとフィールドサーバを用いた植物生産情報自動記録サーバの開発, SHIOZAWA EICHI, HOSHI TAKEHIKO, 農業環境工学関連7学会合同大会講演要旨集,   2005 09 12
  • Development of a Decentralized, Autonomous Greenhouse Environment Control System i na Ubiquitous Computing and Internet Environment, T.Hoshi, Y. Hayashi, H. Uchino, Joint Conference of the 4th Internetional Conference of the Asian Federation of Information Technology in Agriculture and the 2nd World Congress of Computer in Agriculture and Natural Resources, AFITA/WCCA,   2004 08
  • A Decentralized Control and Data Processing System Using Internet Technology for Greenhouse Environment Management, T.Hoshi, Y. Hayashi, E. Shiozawa, H. Uchino, T. Suzuki, Internetional workshop on Environmental Control and Structural Design for Protected Cultivation,   2004 04 , 招待有り
  • 植物生産履歴情報の統合化規格BIX‐pp改良版の策定, HOSHI TAKAHIKO, SHIOZAWA EIJI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2004
  • 温室自律分散環境制御システムの実地試験および性能評価, UCHINO HIROMI, HAYASHI YASUMASA, ISHII MASAHISA, HOSHI TAKAHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2004
  • 高度植物生産を支援するコンピュータ利用システムの研究, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2004
  • 植物生産情報を統合処理・表示するBIX‐pp用プログラムの開発, SHIOZAWA EICHI, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2004
  • XMLによる植物栽培情報のEDI化, HOSHI TAKEHIKO, SUZUKI TAKAFUMI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2003 09 08
  • ユビキタスコンピューティングによる分散型温室環境制御システム, HOSHI TAKEHIKO, HAYASHI YASUMASA, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2003 09 08
  • 水産加工物残さ液の葉面散布が葉菜類の成育に及ぼす影響, IMAMURA YUICHI, MIURA TOMOYOSHI, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2003 09 08
  • 社会的・人為的要因がトマト日生産量の変動に及ぼす影響, SUZUKI TAKAFUMI, HASEGAWA JUN'ICHI, HOSHI TAKEHIKO, WATANABE TSUTOMU, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2003 09 08
  • 竹炭を施用したチャ栽培試験圃場における茶樹の成育と土壌イオン濃度測定, IMAMURA YUICHI, WADA SHUICHI, YAMAGAMI AKIYO, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2003 09 08
  • 収穫量に影響を及ぼす要因と期間の解析ツールの試作, SUZUKI TAKAFUMI, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2002 08 06
  • 自律分散協調型施設環境制御システム用ノードの試作, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2002 08 06
  • 茶畑への竹炭の施用が土壌およびチャの成育に及ぼす影響, IMAMURA YUICHI, YANAGISAWA TAISUKE, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2002 08 06
  • クリモグラフの表示および比較アプレットの開発, KONDO MAYU, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2002 08 06
  • Growth promotion of tea trees by putting bamboo charcoal in soil, T. Hoshi, 2001 International Conference on O-cha(tea) Culture and Science,   2001 10
  • 自律分散制御を用いた大規模苗工場生産支援システムの開発, HAYASHI YASUMASA, HOSHI TAKEHIKO, KUBOTA CHIERI, ZEN CHOKO, KOZAI TOYOKI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2001 06 27
  • 自律分散制御による苗工場生産管理システムの動作特性, YOKOI SHINGO, HASEGAWA TOMOYUKI, HAYASHI YASUMASA, HOSHI TAKEHIKO, TAGUCHI KATSUNORI, KUBOTA CHIERI, ZEN CHOKO, KOZAI TOYOKI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2001 06 27
  • 個体群を管理単位とした生産支援システムの提案, HOSHI TAKEHIKO, HAYASHI YASUMASA, KOZAI TOYOKI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2001 06 27
  • 自律分散制御を用いた苗工場用生産管理システムの栽培試験, HASEGAWA TOMOYUKI, YOKOI SHINGO, SAKAMI KOSUKE, HAYASHI YASUMASA, HOSHI TAKEHIKO, KUBOTA CHIERI, ZEN CHOKO, KOZAI TOYOKI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   2001 06 27
  • コンピュータによる施設個々の生産解析・予測システム, HOSHI TAKEHIKO, UMEDA ATSUSHI, FUSE JUN'YA, KASEDA NAGAO, 日本植物工場学会大会学術講演要旨集,   2000 07 24
  • Java部品化技術を用いた植物生産施設の標準化規格対応ソフトウェアの開発, SHINODA ISAO, HOSHI TAKEHIKO, UCHIDA TSUYOSHI, 日本植物工場学会大会学術講演要旨集,   2000 07 24
  • 植物生産現場における環境計測データ活用のためのソフトウェア技術 データマイニング・モデリング・規格化, HOSHI TAKEHIKO, 日本農業工学会シンポジウム,   2000 05 19 , 招待有り
  • Support Systems for Large-Scale Transplant Production - An Autonomic Decentralized Production Control System and a Production Planning System -, T.Hoshi, Y.Hayashi, T.Kozai, Internetional Sympodium on Transplant Prodution in Closed System for Solving the Gloval Issues on Environmental Conservation, Food, Resources and Energy, Japan Society for Promotion of Science (JSPS),   2000 03 , 招待有り
  • Searching Major Factors Having Influence on Cut-rose Production Using Past Averaging Data and Predicting Harvest Using topological Case-based Modeling, T.Hoshi, A. Umeda, J. Fuse, C. Kaseda, The XIV Memorial CIGR world congress 2000, CIGR (Internetional Commission of Agricultural Engineering),   2000 01
  • Support Systems for Large-scale Transplant Production, T.Hoshi, Y.Hayashi, Proceedings of the Korea-Japan Joint Sympodium on Transplant Production in Horticultural Plants,   1999 11
  • 大規模植物増殖施設における受注・生産管理支援システム, HAYASHI YASUMASA, HOSHI TAKEHIKO, KOZAI TOYOKI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1999 07 28
  • ソフトウェア部品化された植物生産支援システムの試作, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1999 07 28
  • 植物生産における好適温度環境を図示するソフトウェアの開発, SHINODA ISAO, HOSHI TAKEHIKO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1999 07 28
  • 噴霧耕によるPhalaenopsis生産システムの切花の特性, KAGAMI YUKI, EMOTO TAKASHI, HOSHI TAKEHIKO, AKAGI SHIZUKA, TAKATSUJI MASAKI, 日本植物工場学会大会学術講演要旨集,   1998 10
  • 環境計測制御システムの遠隔燥作規格に対応したソフトウェアの開発, HOSHI TAKEHIKO, FUSE JUN'YA, SUGIYAMA TAKUYA, SHINODA ISAO, 日本植物工場学会大会学術講演要旨集,   1998 10
  • 環境計測制御システムの遠隔燥作標準規格に関する意識調査, SHINODA ISAO, HOSHI TAKEHIKO, OKADA KAZUYA, FUSE JUN'YA, 日本植物工場学会大会学術講演要旨集,   1998 10
  • Development of software components meeting the standardization of the remote control method for environment measurement control system., HOSHI TAKEHIKO, FUSE JUN'YA, SHINODA ISAO, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1998 07
  • Yield forecast of cherry tomatoes by a topological case based modeling system, Takehiko Hoshi, Taro Sasaki, Hiroaki TsuTsui, Tsutomu Watanabe, Fujio Tagawa, Proceeding from the 3rd IFAC/CIGR Workshop,   1998 04
  • 位相事例ベースモデリングによるミニトマトの収量予測, 星 岳彦, 佐々木 太郎, 筒井 宏明, 渡邊 勉, 田川 不二夫, 日本農業気象学会1997年度全国大会・日本生物環境調節学会第35回集会・日本植物工場学会平成9年度大会講演要旨,   1997 06
  • 自走式ロボットによる植物生産施設内環境分布測定システム, HOSHI Takehiko, 日本農業気象学会1997年度全国大会・日本生物環境調節学会第35回集会・日本植物工場学会平成9年度大会講演要旨,   1997 06
  • Visualization System of Environmental Information on Internet(PAPERS OF THE 15th SCIENTIFIC RESEARCH MEETING), HONJO Tsuyoshi, HOSHI Takehiko, TAKEUCHI Shinya, FUSE Junya, Landscape Research Japan Online,   1997 03
    Summary:In the present study, prototype of environmental information system using Internet or Internet protocol was developped. The distribution of the data using the protocols or software of Internet is preferable instead of conventional communication software or fax, considering the widespread availability of Internet. The diagram of the system is shown in Fig. 1. One of the functions of the system was data transfer by mail. Software for data transfer from data acquisition computer to WWW system by E-mail was developped using PPP and SMTP. By this method, data acquisition was made possible in the area where LAN is not constructed. Another function was data distribution by WWW and 3D visualization on WWW. WWW server was made and terrain rendering software with CGI scripts were developped for the 3D visualization. Landsat data or meteorological data like temperature, relative humidity are overlaid with digital elevation model and 3D images were shown on the home pages.
  • Possibility of a plant production support system through Internet by JavaScript., HOSHI TAKEHIKO, 日本植物工場学会大会学術講演要旨集,   1996 08
  • Examination of the environmental measurement control system used of ODBC for operating method standardization of the data., FUSE JUN'YA, HOSHI TAKEHIKO, 日本植物工場学会大会学術講演要旨集,   1996 08
  • Ion absorption characteristics and sugar/chlorophyll content of spinach cultured by sodium chloride added culture solution., HOSHI TAKEHIKO, ISHII MASAHIKO, YAMADA KAZUHARU, MIMURA SATOSHI, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1996 07
  • Weather information system using WWW., HONJO TAKESHI, HOSHI TAKEHIKO, TAKEUCHI SHIN'YA, FUSE JUN'YA, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1996 07
  • Present state and problem of the information utilization in agriculture in the Internet age., HOSHI TAKEHIKO, システム農学会シンポジウム要旨集,   1996 05
  • 塩化ナトリウム添加養液による養液栽培ホウレンソウの成育促進, 三村聡, 星岳彦, 高辻正基, 日本植物工場学会平成7年度大会学術講演要旨集 日本植物工場学会,   1995 08
  • 環境計測制御システムの遠隔操作方法標準化に関する意識調査, 布施順也, 星岳彦, 日本植物工場学会平成7年度大会学術講演要旨集 日本植物工場学会,   1995 08
  • Development of a self-propelled sprinkling robot for soil moisture control of individual plants., HOSHI TAKEHIKO, HAYASHI YASUMASA, FUJIMA TAKAO, SASAKI TARO, 日本植物工場学会大会学術講演要旨集,   1995 08
  • Growth model preparation support system based on measured values of estimated environment., HOSHI TAKEHIKO, FUSE JUN'YA, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1995 07
  • An object-oriented plant growth modeling support System based upon cumulation of environments, Takehiko Hoshi, Jyunya Fuse, 2nd IFAC/IFAP/EurAgEng Workshop on Artificial Intelligence In Agricuture,   1995 05
  • インターネットのSMTPを用いた環境計測・制御情報システム, 星岳彦, 高辻正基, 日本植物工場学会大会学術講演要旨集,   1994
  • 植物形態をモデルにした環境制御システムの基礎的検討画像内挿プログラム(Morph)による隔測データ補間, 星岳彦, 瀧口武, 高辻正基, 日本植物工場学会大会学術講演要旨集,   1993 08
  • 植物の運動解析に基づく生体情報計測 ホウレンソウ地上部の運動と成育環境条件との関係, 星岳彦, 瀧口武, 高辻正基, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1993 04
  • マルチメディアエキスパートシステムによる芝生の病害診断システムの開発, 星 岳彦, 貫 和之, 阿部 勉, 日本植物工場学会平成4年度大会学術講演会,   1992 08
  • Expert System for Maintenance and Environmental Control of Plant Growth Factories, Takehiko Hoshi, IFAC Workshop on Expert Systems in Agriculture,   1992 08 , 招待有り
  • 植物工場遠隔管理システム用の低コストカラー画像通信方式の検討, 星 岳彦, 吉田 智一, 田上 隆一, 日本植物工場学会(平成3年度大会)学術講演会,   1991 08
  • An object-oriented environmental control model in protected cultivation, Takehiko Hoshi, MATHEMAICAL AND CONTROL APPLICATION IN AGRICULTURE AND HORTICULTURE (ED.BY Y.HASHIMOTO AND W.DAY), proceedings of IFAC workshop,   1991 08
  • コンピュータを用いた戦略的環境制御装置の基礎的検討 (1) 環境調節機器へのCIC制御におけるファジイ制御の応用, 星岳彦, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1990 08
  • 対話型農産物直販システムにおけるパソコン通信の応用, 星岳彦, 吉田智一, 田上隆一, 日本農業気象学会全国大会日本生物環境調節学会大会合同大会講演要旨,   1990 08
  • 植物工場におけるコンピュータ利用, HOSHI Takehiko, 日本植物工場学会平成2年度大会シンポジウムおよび学術発表会,   1990 07 , 招待有り
  • 自然光利用野菜工場の開発 7.ポリダクトを用いた温室の冷・暖房熱交換システム, 岡野利明, 小酒井一嘉, 星岳彦, 寺添斉, 平成元年度日本農業気象学会全国大会,   1990 07
  • 自然光利用野菜工場の開発 8.養液栽培におけるホウレンソウの生育に及ぼす亜鉛の影響, 寺添斉, 岡野利明, 星岳彦, 小酒井一嘉, 小川正, 平成元年度日本農業気象学会全国大会,   1990 07
  • 自然光利用野菜工場の開発 9.野菜移動方式作業機械, 星岳彦, 岡野利明, 寺添斉, 小酒井一嘉, 平成元年度日本農業気象学会全国大会,   1990 07
  • マルチメディアによる植物情報ライブラリの開発(1)CD-Iを使った花と緑のライブラリ, 安藤 敏夫, 星 岳彦, 上田 善弘, 園芸学会平成2年度春季大会,   1990 04
  • マルチメディアによる植物情報ライブラリの開発(2)イメージによって植物の検索を行うアルゴリズム, 星 岳彦, 安藤 敏夫, 上田 善弘, 園芸学会平成2年度春季大会,   1990 04
  • Disease and pest diagnosis for tomato, Hoshi,T, Kozai,T, 2nd International DLG-congress for Computer Technology -Knowledge based systems in agriculture-papers,   1988 06
  • 自然光利用野菜工場の開発 4. 外部遮光を行った場合の冬期の温室内冷房負荷, 岡野利明, 星岳彦, 寺添斉, 小酒井一嘉, 小川正, 昭和63年度日本農業気象学会全国大会,   1988 04
  • 自然光利用野菜工場の開発 5.養液栽培システムと培養液の調節, 寺添斉, 岡野利明, 星岳彦, 小酒井一嘉, 小川正, 昭和63年度日本農業気象学会全国大会,   1988 04
  • 自然光利用野菜工場の開発 6培養液に光が入射する場合の作物生育, 星岳彦, 岡野利明, 寺添斉, 関山哲雄, 山本雄二郎, 昭和63年度日本農業気象学会全国大会,   1988 04
  • 農業情報システムの現状と展望, HOSHI Takehiko, 特別セミナー「バイオテクノロジーとコンピュータ利用による次世代植物生産システムの実現」、‘88国際シンポジューム「施設園芸における先端技術」組織委員会・日本生物環境調節学会,   1987 12 , 招待有り
  • 自然光利用野菜工場の開発 1.冷暖房システムと負荷特性, 岡野利明, 星岳彦, 関山哲雄, 上原毅, 昭和62年度日本農業気象学会全国大会,   1987 04
  • 自然光利用野菜工場の開発 2.スペーシング栽培方法とサラダナの生育, 岡野利明, 星岳彦, 小酒井一嘉, 岡部勝美, 羽生広道, 関山哲雄, 昭和62年度日本農業気象学会全国大会,   1987 04
  • 自然光利用野菜工場の開発 3.環境調節システムと通信ネットワーク, 星岳彦, 岡野利明, 関山哲雄, 昭和62年度日本農業気象学会全国大会,   1987 04
  • 知識工学手法による施設栽培支援システムの開発(1)野菜工場の運転支援システム, 星岳彦, 岡野利明, 昭和62年度日本農業気象学会全国大会,   1987 04
  • 環境情報システムの展望, HOSHI Takehiko, 第2回農業生産と環境シンポジウム、農業環境学会連合,   1986 10 , 招待有り
  • 画像処理による複数葉の同時計測システムの開発, HOSHI Takehiko, 昭和61度日本農業気象学会関東支部会,   1986 10
  • 自然光利用型野菜工場における環境調節, HOSHI Takehiko, 昭和61年度日本農業気象学会北海道支部大会シンポジューム,   1986 09 , 招待有り
  • 高能率野菜生産技術の開発-自然光併用型施設におけるサラダナの生育-, 星岳彦, 岡部勝美, 関山哲雄, 昭和61年度日本農業気象学会全国大会,   1986 05
  • モデル温室による暖・冷房負荷の測定, 岡野利明, 星岳彦, 関山哲雄, 昭和61年度日本農業気象学会全国大会,   1986 05
  • 知識工学手法を用いた農業用コンサルテーションシステム-イチゴおよびナシの病害診断への応用-, 古在豊樹, 茂呂紀江, 森田久美, 星岳彦, 昭和61年度日本農業気象学会全国大会,   1986 05
  • 高能率野菜生産技術の開発(第1報)夜間補光がホウレンソウの生育および品質に及ぼす影響, 星岳彦, 岡部勝美, 関山哲雄, 昭和60年度園芸学会春季大会,   1985 04
  • 商業温室における環境制御用コンピュータの稼動実態(1)データ収集システム, 星岳彦, 三原恵, 古在豊樹, 河住春樹, 昭和59年度日本農業気象学会全国大会,   1984 05
  • マイクロコンピュータを用いた園芸用コンサルテーションシステムの開発, 星岳彦, 古在豊樹, 昭和59年度日本農業気象学会全国大会,   1984 05
  • 知識工学的手法を用いたマイクロコンピュータによるトマト病害診断システムの試作, 星岳彦, 古在豊樹, 昭和59年園芸学会秋季大会,   1984 05
  • 園芸作物栽培用知的支援システムの開発(第2報)サブプロセッサ支援ソフトウェアの開発, 星岳彦, 古在豊樹, 渡部一郎, 昭和58年度農業気象学会全国大会,   1983 04
  • 園芸作物栽培用知的支援システムの開発(第1報)サブプロセッサの開発, 星岳彦, 古在豊樹, 渡部一郎, 昭和57年度農業気象学会関東支部会,   1983 01
  • 葉形・葉面積情報計測処理システムの開発(1)単葉の葉面積、葉幅および葉長の画像計測処理, 古在豊樹, 熊谷美佳子, 星岳彦, 渡部一郎, 昭和57年度日本農業気象学会全国大会,   1982 05
  • オンライン交雑記録・品種特性検索用データベースシステム(ORCHIDS)の開発(第1報)構造と機能, 星岳彦, 渋谷紀子, 安藤敏夫, 古在豊樹, 昭和57年度園芸学会春季大会,   1982 04
  • オンライン交雑記録・品種特性検索用データべ-スシステム(ORCHIDS)の開発(第2報)使用の手順とコマンド, 渋谷紀子, 星岳彦, 安藤敏夫, 古在豊樹, 昭和57年度園芸学会春季大会,   1982 04
  • T. Hoshi, J. Fuse An object-oriented plant growth modeling support System based upon cumulation of environments, 2nd IFAC / IFAP /EurAgEng Workshop on Artificial Intelligence Agicuture International Federation of Automatic Control,   1995

Works

  • Development of database and model cooperation systems
  • Study on closed type transplant factory for practical use

Misc

  • Dissemination of Japanese environmental control technology and the role of extension instructors, Takehiko Hoshi, Monthly Journal of Agriculture and Extension, 57, 9, 16, 17,   2020 08 , 招待有り
  • World of Agricultural Sensing No.25, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 10, 16, 17,   2020 08 , 招待有り
  • Challenges and prospects for introducing smart agricultural technology to Japanese production sites on greenhouse horticulture, Takehiko Hoshi, JATAFF Journal, 8, 8, 30, 34,   2020 08 , 招待有り
  • World of Agricultural Sensing No.24, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 9, 14, 15,   2020 07 , 招待有り
  • World of Agricultural Sensing No.23, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 8, 12, 14,   2020 06 , 招待有り
  • World of Agricultural Sensing No.22, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 7, 10, 11,   2020 05 , 招待有り
  • World of Agricultural Sensing No.21, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 6, 10, 11,   2020 04 , 招待有り
  • World of Agricultural Sensing No.20, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 5, 10, 12,   2020 03 , 招待有り
  • World of Agricultural Sensing No.19, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 4, 10, 12,   2020 02 , 招待有り
  • World of Agricultural Sensing No.18, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 3, 10, 12,   2020 01 , 招待有り
  • World of Agricultural Sensing No.17, Takehiko Hoshi, Interface, CQ Publishing Co., 46, 2, 12, 14,   2019 12 , 招待有り
  • World of Agricultural Sensing No.16, HOSHI Takehiko, Interface, CQ Publishing Co., 46, 1, 12, 14,   2019 11 , 招待有り
  • World of Agricultural Sensing No.15, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 12, 12, 14,   2019 10 , 招待有り
  • World of Agricultural Sensing No.14, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 11, 12, 14,   2019 09 , 招待有り
  • World of Agricultural Sensing No.13, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 10, 14, 16,   2019 08 , 招待有り
  • World of Agricultural Sensing No.12, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 9, 10, 14,   2019 07 , 招待有り
  • World of Agricultural Sensing No.11, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 8, 10, 12,   2019 06 , 招待有り
  • World of Agricultural Sensing No.10, HOSHI Takehiko, Interface, CQ Publishing Co., 45, 7, 16, 18,   2019 05 , 招待有り
  • 低コスト・省力化,軽労化技術等の開発―農家の作業技術の数値化及びデータマイニング手法の開発―第1章「農匠ナビ」全体システム設計・開発・評価 1「農匠ナビ」全体システム設計・実証および農作業連続計測・可視化・データマイニング基盤技術の研究開発, 南石晃明, 谷口倫一郎, 竹田正幸, 星岳彦, 岡安崇史, 平井康丸, 坂内英夫, 長原一, 金子邦彦, 有田大作, 竹内重吉, 畑埜晃平, 島田敬士, 長命洋佑, 農林水産省農林水産技術会議事務局研究成果, 543, 14‐18,   2016 03 31 , http://jglobal.jst.go.jp/public/201602215478801207
  • 統合環境制御とICT利用の最新技術 ユビキタス環境制御システム(UECS)の今と展望, HOSHI TAKEHIKO, 施設と園芸, 164, 12, 16,   2014 01 , 招待有り, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201402213347936141
  • ユビキタス環境制御システム(UECS=ウエックス)について, HOSHI Takehiko, 技術と普及, 50, 12, 53, 53,   2013 12 , 招待有り
  • Measurement of Crop Growth Information by Optical and Weight Sensors and that Standardization for Integration with Environmental Information in Greenhouses, HOSHI Takehiko, 計測と制御 = Journal of the Society of Instrument and Control Engineers, 52, 8, 690, 695,   2013 08 , Refereed, 招待有り, 10.11499/sicejl.52.690, http://ci.nii.ac.jp/naid/10031193219
  • 加工・業務用果菜類の育成と低コスト栽培技術の開発 第2章 トマト等栽培技術ユニット 8b 業務用トマトの安定多収生産のための高補光効果を目指した連携型補光システムの開発, HOSHI TAKEHIKO, 農林水産省農林水産技術会議事務局研究成果, 484, 97, 103,   2013 01 31 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201302201711838929
  • 加工・業務用果菜類の育成と低コスト栽培技術の開発 第2章 トマト等栽培技術ユニット 8 業務用トマトの安定多収生産のための自律分散協調型補光システムの開発, HOSHI TAKEHIKO, 農林水産省農林水産技術会議事務局研究成果, 484, 91, 97,   2013 01 31 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201302231361030695
  • 2. Plant Production Support in Greenhouses by Ubiquitous Sensor Networks(Ubiquitous Sensor Networks and Their Practical Uses for Supporting Our Society), HOSHI Takehiko, The Journal of the Institute of Electronics, Information, and Communication Engineers, 95, 9, 779, 783,   2012 09 , http://ci.nii.ac.jp/naid/110009496246
    Summary:少子化,高齢化に伴って,我が国の農業,植物生産のあり方も大きく変化しようとしている.植物工場などの施設植物生産も例外ではなく,施設面積の減少,競争の激化,内需の縮小に対応し得る,新たな植物生産システムの構築が急務である.植物の成育には環境が大きな影響を及ぼす.生産現場における,この環境の低コストセンシングによる可視化,ディジタル化と,植物生体情報・労務情報・市場情報との連携は重要である.そこで,自律分散環境計測制御システムであるユビキタス環境制御システム(UECS)を中心とした,施設植物生産における今後のセンシング・コントロール・アプリケーション開発の方向性について解説した.
  • 植物工場の設備・システム及び設計 植物工場の環境制御 人工光型と太陽光型の環境制御の特徴と課題, HOSHI TAKEHIKO, 建築設備と配管工事, 50, 2, 13, 17,   2012 01 10 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201202221837987338
  • Present Situation and Future Prospects of Environmental Measurement-control Systems and Product Management Systems in Plant Factories, HOSHI Takehiko, KAMEOKA Takaharu, 化学工学 = Chemical engineering, 75, 12, 798, 801,   2011 12 05 , http://ci.nii.ac.jp/naid/10030159593
  • 植物工場における環境制御と情報プラットホームの確立, HOSHI TAKEHIKO, 農業機械学会誌, 73, 2, 92, 96,   2011 03 01 , 10.11357/jsam.73.92, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201102257185352642
  • 植物工場:最近の動きと将来展望 わが国の太陽光型植物工場の動向とシステム・情報化の展望, HOSHI TAKEHIKO, 農林水産技術研究ジャーナル, 34, 2, 15, 19,   2011 02 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201102243888315888
  • ユビキタス環境制御システムに対応した植物成育計測ノードの開発, 星岳彦, 加藤翔太, 今原淳吾, 南石晃明, 日本生物環境工学会大会講演要旨, 2011, 36, 37,   2011 , http://jglobal.jst.go.jp/public/201102225692324520
  • 地域産業振興をめぐる動向 植物工場をめぐる動き―第二次植物工場ブームの可能性と課題―, HOSHI TAKEHIKO, 産業立地, 49, 3, 28, 33,   2010 05 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=201002276957816353
  • 農業・水産業におけるエレクトロヒートシステム 植物生産のためのユビキタス環境制御システム, HAYASHI YASUMASA, HOSHI TAKEHIKO, エレクトロヒート, 168, 1, 8,   2009 11 15 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902277789697233
  • Kansei-oriented support systems for plant production in plant factories, 星 岳彦, Journal of Japan Society of Kansei Engineering, 9, 1, 31, 35,   2009 11 , http://ci.nii.ac.jp/naid/40017074471
  • 夢から現実へ向かう植物工場 太陽光利用型植物工場における環境制御システムの展望―情報化による持続的精密施設植物生産の達成―, HOSHI TAKEHIKO, 施設と園芸, 144, 16, 21,   2009 01 30 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902294996957905
  • 温室環境制御のイノベーションを目指すユビキタス環境制御システム 下, HOSHI TAKEHIKO, 農業電化, 61, 7, 16, 19,   2008 07 15 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902218397228883
  • ユビキタス環境制御システムによる施設園芸生産のICT化, HOSHI TAKEHIKO, 農業情報研究, 17, 1, 13, 18,   2008 07 , 招待有り, 10.3173/air.17.13, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902299897813197
  • 施設園芸情報化の鍵となるユビキタス環境制御システム, HOSHI TAKEHIKO, Techno Innov, 17, 3, 29, 34,   2007 09 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902240652009282
  • 機器構成の自動認識機能を持つ温室の遠隔監視ソフトウェア, KUROSAKI HIDEHITO, YASUBA KEN'ICHIRO, HAYASHI YASUMASA, HOSHI TAKEHIKO, TAKAICHI MASUYUKI, OMORI HIROMI, 野菜茶業研究成果情報, 2006, 21, 22,   2007 08 31 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902273803725096
  • データベース・モデル協調システムの開発 第2章 農業情報マルチメディアデータマイニングシステムの開発 3 植物生産情報のマイニング・モデリングシステムの開発, HOSHI TAKEHIKO, 農林水産省農林水産技術会議事務局研究成果, 448, 86, 90,   2007 03 26 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902210584762922
  • 第2編 低コスト・省力型野菜開発チーム 第8章 高温期の高品質生産のための生理・生態特性に基づいた環境制御技術の開発 6 ネットワーク自律分散協調型低コスト環境制御システムの構築, HOSHI TAKEHIKO, 農林水産省農林水産技術会議事務局研究成果, 454, 228, 230,   2007 03 26 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902293809756490
  • ユビキタス環境制御技術の開発, HOSHI TAKEHIKO, 農業機械学会誌, 69, 1, 8, 12,   2007 01 01 , 10.11357/jsam1937.69.8, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902261267816085
  • 人工環境栽培技術の現状と課題―大型施設栽培から植物工場まで―自律分散型環境制御技術(ユビキタス環境制御)の現状, HOSHI TAKEHIKO, フレッシュフードシステム, 35, 4, 13, 17,   2006 10 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902239014530970
  • 進化する大規模施設栽培 施設園芸生産のためのユビキタス環境制御システムの開発, HOSHI TAKEHIKO, 農林水産技術研究ジャーナル, 29, 8, 15, 19,   2006 08 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902298034828661
  • 温室用の自律分散型ユビキタス環境制御システムの構築, TAKAICHI MASUYUKI, KUROSAKI HIDEHITO, WATANABE SHIN'ICHI, KAWASHIMA HIROKI, NAKANO YUKA, HOSHI TAKEHIKO, HAYASHI YASUMASA, YAMAGUCHI HIROAKI, BABA MASARU, AIHARA YUSUKE, 野菜茶業研究成果情報, 2005, 15, 16,   2006 06 20 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902274204696106
  • 新しい施設開発に向けた取組み 効率化・低コスト化を達成するユビキタス施設環境制御システム, HOSHI TAKEHIKO, HAYASHI YASUMASA, 施設と園芸, 131, 22, 26,   2005 11 10 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902207241864362
  • トレーサビリティシステム, HOSHI TAKEHIKO, SHITA Rep, 22, 22, 14, 23,   2005 04 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902228994875720
  • Proposal of an ubiquitous environmental control system for protected horticulture., HAYASHI YASUMASA, HOSHI TAKEHIKO, TAKAICHI MASAYUKI, YAMAGUCHI HIROAKI, AIHARA YUSUKE, 農業および園芸, 79, 8, 845, 853,   2004 08 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902297923043920
  • インターネットとDSL技術, HOSHI Takehiko, 農業情報利用, 30, 54, 57,   2001 03 , 招待有り
  • 大規模植物苗生産施設のための受注・生産管理システム, HAYASHI YASUMASA, HOSHI TAKEHIKO, KOZAI TOYOKI, 農業および園芸, 75, 11, 1165, 1174,   2000 11 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902155016374160
  • 農業における情報化技術の現状と将来方向, HOSHI Takehiko, 農業, 1404, 25, 29,   2000 06 , 招待有り
  • 大規模植物増殖施設における受注・生産管理システム, HAYASHI YASUMASA, HOSHI TAKEHIKO, KOZAI TOYOKI, SHITA Rep, 16, 16, 1, 13,   2000 01 19 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902188280371522
  • 花き施設生産における環境制御の精密化とコンピュータシステムの活用, HOSHI Takehiko, (財)日本花普及センター、花き情報, '99, 4, 22, 26,   1999 12 , 招待有り
  • Forum on agriculture software. Role and direction of agriculture software for agriculture renovation., YOSHIMURA HIDEKIYO, MACHIDA TAKEMI, SHIBUSAWA SAKAE, HOSHI TAKEHIKO, SASAKI KOJI, KAWAE TATSUMI, KITAHARA SHIN'ICHIRO, KIMURA HIROSHI, NAKAMURA FUMIO, 農業情報利用, 25, 38, 41,   1999 03 31 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902135371457873
  • Allowing everybody to handle environmental data swimmingly. Standardization of information communication type for environmental control system in gardening facilities., HOSHI TAKEHIKO, FUSE JUN'YA, SHINODA ISAO, 農業情報利用, 23, 50, 55,   1998 08 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902152709039853
  • Agricultural Information on the Internet and Its Retrieval, HOSHI Takehiko, Farming Japan Co. Ltd.,Farming Japan, 32, 3, 16, 21,   1998 03 , 招待有り
  • Database construction of the vegetable selection measurement data and the application. Development of a new data system connected to internet communication network., MIYAZAKI KIYOTAKA, FUJIWARA KAZUHIRO, IIMOTO MITSUO, HOSHI TAKEHIKO, 農業および園芸, 72, 10, 1103, 1110,   1997 10 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902135973066743
  • Agricultural information system and the actions in producing centers.Internet's utilization in fruits producing center., HOSHI TAKEHIKO, 果実日本, 52, 10, 38, 41,   1997 10 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902187027699876
  • Information technology in agriculture. 4. Internet utilization in agriculture., HOSHI TAKEHIKO, 農業電化, 50, 7, 12, 16,   1997 07 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902161653984982
  • Trends of Internet utilization in plant production., HOSHI TAKEHIKO, SHITA Rep, 13, 37, 47,   1997 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902113047116156
  • Situation and Problem on Offers of Agricultural Information in the Internet Era., HOSHI TAKEHIKO, システム農学, 12, 2, 126, 132,   1996 10 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902127573286970
  • Present state and prospect of utilization of Internet in agriculture. (2), HOSHI TAKEHIKO, 農業および園芸, 71, 8, 900, 906,   1996 08 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902176583307985
  • Present state and prospect of the Internet utilization in agriculture. (1)., HOSHI TAKEHIKO, 農業および園芸, 71, 7, 797, 801,   1996 07 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902190215013508
  • An Application of Expert Systems for Diagnosing Plant Diseases and Pests on Turf Management in Golf Links., HOSHI TAKEHIKO, NUKI KAZUYUKI, OTA NORIO, 植物防疫, 49, 12, 511, 515,   1995 12 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902113073621829
  • Information Services on the Internet., HOSHI TAKEHIKO, 農業気象, 50, 1, 59, 64,   1994 06 , 10.2480/agrmet.50.59, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902102083669976
  • Image monitor and growth control., HOSHI TAKEHIKO, SHITA Rep, 7,122-127, 7, 122, 127,   1994 01 , 招待有り, http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902164806000234
  • Use of personal computer in the gardening.13.Future use of personal computer with skillful farmer's techniques., HOSHI TAKEHIKO, 農耕と園芸, 48, 1, 152, 155,   1993 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902105183840779
  • ウルトラマン世代の知的遊戯 植物と遊ぶ, 星岳彦, Glass Archit, 416, 7, 11,   1992 08 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902066300879511
  • 園芸におけるパソコンの利用 1 パソコン利用の可能性, 星岳彦, 農耕と園芸, 47, 1, 152, 155,   1992 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902057526842360
  • Management technique of nourishing solution.View of solution culture in plant factory., HOSHI TAKEHIKO, SHITA Rep, 2, 6, 15,   1991 12 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902028733313319
  • Development of online expert system for operating vegetable factory., HOSHI TAKEHIKO, OKANO TOSHIAKI, 電力中央研究所我孫子研究所報告, U89004, 17P,   1989 05 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902006971394501
  • 人工知能について, HOSHI Takehiko, システム農学, 5, 1, 3, 11,   1989 04 , 招待有り
  • Development of high productive technology for vegetables. (5). Development of a control system of hydroponic solution., TERAZOE HITOSHI, OKANO TOSHIAKI, HOSHI TAKEHIKO, KOZAKAI KAZUYOSHI, OGAWA TADASHI, 電力中央研究所我孫子研究所報告, U88054, 24P,   1989 02 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902053140594995
  • Vegetable factory and electrical installation. 6. Vegetable growth and contral., HOSHI TAKEHIKO, OKANO TOSHIAKI, TERAZOE HITOSHI, 電気設備学会誌, 9, 2, 127, 133,   1989 02 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902089629268270
  • Development of high productive technology for vegetables. (4). Environmental control system and air conditioning load in facilities for the experiments., OKANO TOSHIAKI, HOSHI TAKEHIKO, KOSAKAI KAZUYOSHI, TERAZOE HITOSHI, OGAWA TADASHI, 電力中央研究所我孫子研究所報告, U88015, 46P,   1988 10 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902085171532300
  • Development of high productive technology for vegetables. (3). Cultivation on some vegetables in a test plant., HOSHI TAKEHIKO, OKANO TOSHIAKI, KOSAKAI KAZUYOSHI, TERAZOE HITOSHI, 電力中央研究所我孫子研究所報告, U88008, 44P,   1988 09 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902083274547841
  • Development of a high productive technology for vegetables. (1) Performance of a test plant and experiments of spinach cultivation., SEKIYAMA TETSUO, OKANO TOSHIAKI, HOSHI TAKEHIKO, KOSAKAI KAZUYOSHI, OKABE KATSUYOSHI, HANYU HIROMICHI, 電力中央研究所我孫子研究所報告, 485031, 56P,   1987 02 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902054481056289
  • Air conditioning technology and plant factory. Plant factory system using midnight power and spinach cultivation., OKANO TOSHIAKI, HOSHI TAKEHIKO, SEKIYAMA TETSUO, 空気調和と冷凍, 27, 1, 58, 66,   1987 01 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902088613524661
  • Development of a factory style plant production system & its problems. Actual examples of industrialized vegetable production - A combination use of natural light and artificial light., SEKIYAMA TETSUO, OKANO TOSHIAKI, HOSHI TAKEHIKO, 食品工業, 29, 24, 32, 38,   1986 12 30 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902053723645725
  • Development of a vegetable factory using off-peak electricity., OKANO TOSHIAKI, HOSHI TAKEHIKO, Bio Ind, 3, 13, 971, 980,   1986 12 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902092058467727
  • 施設園芸におけるマイクロコンピュータ導入の手引, 中川行夫, 安井秀夫, 大原源二, 古在豊樹, 星岳彦, 高倉直, 庄野浩資, 蔵田憲次, 施設園芸におけるマイクロコンピュータ導入の手引 昭和61年, 144P,   1986 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902087953097230
  • Lighting data sheets. No. 807. Illumination for basic test of high-efficiency vegetable cultivation utilizing night electric energy othermise wasted, Chiba prefecture., HOSHI TAKEHIKO, SEKIYAMA TETSUO, 照明学会誌, 69, 11, 576(5)-(6),   1985 11 , http://jglobal.jst.go.jp/detail.php?from=API&JGLOBAL_ID=200902050299766933
  • An Environmental Control System Based on the Decentralized Autoromous Control, SHITA Journal, 14(3), 157-164,   2002 , 10.2525/jshita.14.157
  • Growth Promotion of Tea Trees by Putting Bamboo Chareoal in Soil, Proceedings of International Conference on O-Cha(Tea) Culfure and Science, 147-150,   2001
  • Yield forecast of cherry tomatoes by a topological case based modeling system, T Hoshi, T Sasaki, H Tsutsui, T Watanabe, F Tagawa, ARTIFICIAL INTELLIGENCE IN AGRICULTURE 1998, 175, 180,   1998
    Summary:A daily yield forecast system for cherry tomato production equipment that was harvested every day in a large-scale greenhouse was developed. The forecast system was based on a data mining system and a topological case based modeling system by a personal computer. Four variables for forecast, yield in the past, numeric code of day of the week, total working hours and daily difference of air temperature, were chosen by the step-wise multiple regression analysis. The average error of the forecasted yield by the developed system was +/-31.37 kgday(-1) (25.6%). The results of the data mining, the factors that influenced the daily yield of cherry tomatoes, were manpower and the past yield rather than environment. Copyright (C) 1998 IFAC.
  • Image Monitoring and Growth Control in Plant Factories, SHITA Report, 7,122-127,   1994
  • Fundamental Study on Production Assisted System in Plant Factories, Chiba University Doctor's thesis, 107,   1994
  • Development of an Expert System Using Image Database for Diagnosing Plant Protection, Acta Horticultuae, 319,   1992
  • Object-Oriented Software Development System of Environmental Controllers in Plant Growth Factories, 3, 2,   1992
  • A Fundamental Study on Extended Fuzzy Environmental Control Based on Description of Graphs and Phrases, Takehiko Hoshi, Journal of Agricultural Meteorology, 47, 4, 225, 232,   1992 , 10.2480/agrmet.47.225
    Summary:An extended fuzzy control Software was designed to perform environmental control to save developing cost and debugging labor. In the Software, the control know-how was represented as graphs with some phrases, named CIC Operators (CIC: Correlation between Intention grade and Control setpoints). The graphs represented correlation between intention grade of environmental control and each greenhouse environmental condition. The phrases represented explanations of the control aim using the graphs and control messages for changing the environmental conditions. A score of control achievement was denoted by a minimum intention grade using the graphs in the time of environmental conditions. Then, the Software tried to control the environment condition giving the minimum intention grade. The goal of Software is to get the perfect score of control achievement. The control Software was applied to Simulation test for a greenhouse heating control. The results showed that the Software could control the greenhouse inside air temperature using the three CIC Operators to satisfy average setpoint, changing rate setpoint and minimum setpoint. Showing the phrase of the CIC Operator and the present value of the greenhouse environment condition having the minimum intention grade could help the Software developers and growers with understanding the Software Operation. The results suggested the possibility of a new high Performance environmental Controller. © 1992, The Society of Agricultural Meteorology of Japan. All rights reserved.

Research Grants & Projects

  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Scheme of agro-wisdom robot for technology transfer of experienced farmers, A scheme of agro-wisdom robot system involves three main requirements: model of decision making process, data category to be used for decision in agro-information database and communication functions of agricultural robot system. The decision making system involves four phase of intelligence: data, information, knowledge and wisdom. The data category is composed of four clusters: crop information, soil information, crop protection, and market information. The robot should have communication functions on intellectual properties or know-how, tacit knowledge, farm management, health and security, and farm work recording. With the results a new project'concurrent bio-science for innovative users with visualized agro-wisdom integration' was configured.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Research on Systems of Human Resources Development for Agricultural Innovation, The objective of this research is to systematize useful findings on constructing a system to develop human resources to become the foundation for the next-generation of agricultural management reform from an interdisciplinary and international perspective. The main results of this research are categorized into four topics. First, current situations and issues of VET (the vocational education and training), were clarified based on the surveys in European major countries such as Switzerland, France, Germany, Denmark, Britain, the Netherlands, and Spain. Second, the current situations and issues of VET in advanced farm enterprises in Japan were analyzed statistically as well as by case studies. Third, the ICT applications and the farming skill know-how succession were clarified from the aspect of knowledge and the information management. Fourthly, the implications of these findings and perspective of the agriculture human resources development in next generation were given.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Establishment of Application Software for Supporting Protected Horticultural Crop Production Based on a Decentralized Environmental Control System, To aim informatization and highly-development of the protected horticultural production, development of application software supporting crop production in the greenhouse that was installed a ubiquitous environmental control system was studied. Information format was standardized in order to accelerate the software development and popularization. Some convenience applications, such as environment alerting software that detected conditions of diseases outbreak and insufficient photosynthesis by matching the measured environmental elements, were developed.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(C)), Study on EDI promotion of plant production process, A method for effectively collecting, expressing, and disclosing information on the plant production process was proposed. To advance the computerization of plant production, all information related to a plant production was unified as a standard XML document The proposed standard was named BIX-pp (Bio-Information Exchange for Plant Production). To evaluate it a set of information related to hydroponics spinach production in one Tokai University greenhouse was converted into sample BIX-pp, data, and total twelve kinds of BIX-pp correspondence application programs were made. Evaluation results confirmed that BIX-pp was capable of uniting all plant production infuriation. It was considered that the reusability and the generality of the application programs were improved by making BIX-pp a standard form of information on the plant production in the program input. In addition, because the structure of information and the definition of the meaning were input to the application program at the same time, the information processing work was simplify; and the promotion of utilization of further plant production information was expected.
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Fundamental Research on a closedtransplant production system, Our research showed that the closed transplant production system with artificial light and controlled environments is suitable for commercially producing high quality transplants in a reduced time period with reduced resource and environmental pollution. The production period could he reduced by 30% compared with the production period in the conventional, open production system (i.e. greenhouse). The water and CO_2 consumption in the closed system were, respectively, about 1/20 and 1/4 of those in the open system. Electric energy consumption per transplant was about 0.4MJ and its cost was about 0.5 Yen. This cost is relatively low compared with the price of vegetable transplants (50-100Yen). Hence, the closed system was economically competitive over the open system for many horticultural, medicinal and other crops and it has been commercialized in 2003 in Japan and is expected to be commercialized in other countries in the near future. More research is needed for examining the physiological responses of transplants to environments and the energy/mass balance of the closed system
  • Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research(基盤研究(A)), Research on a closed transplant production factory for practical use, Our research showed that the closed transplant production system with artificial light and controlled environments is suitable for commercially producing high quality transplants in a reduced time period with reduced resource and environmental pollution. The production period could be reduced by 30 % compared with the production period in the conventional, open production system (i.e. greenhouse). The water consumption in the closed system was about 10 % of that of the open transplant production system. Percentage of CO_2 fixed by transplants through photosynthesis over CO_2 supplied into the closed system was about 90 %. Energy consumption per transplant was about 0.4 MJ and its cost was about 1.5 Yen. This cost is relatively low compared with the price of vegetable transplants (50-100 Yen). Then, the closed system with artificial lighting can be used for commercial production of value-added transplants. More research is needed for examining the physiological responses of transplants to environments and the energy/mass balance of the closed system
  • Environmental control system for plant production
  • Study on Plant Factories
  • Study on Computer Assisted Systems for Plant Production