記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

ISO-19683, "Space systems - Design qualification and acceptance tests of small spacecraft and units" was published in July 2017. The standard describes the minimum test requirements and test methods for lean satellite and their units. The standard has served as a guideline for lean satellite testing for the past five years. The document, however, was made based on the state-of-art knowledge in early 2010s. In the past 10 years, much wider and deeper knowledge regarding the lean satellite testing has been gained. Also, in early 2010s, most of lean satellites was still one of a kind, dealing with a single satellite only. But, nowadays, we see many constellation programs especially in the area of CubeSats. The standard is now under revision process to reflect those points by December 2025. In the revision, the two points; (1) reflecting the state-of-art knowledge based on the experience of the past 10 years, (2) adding a chapter regarding testing of constellation satellite programs, will be considered. For the second points, basic research is being conducted about how to improve the testing efficiency and how to formulate a logic of skipping some tests for satellites of identical design. This paper describes the research results obtained through the basic researches, especially in visual inspection before/after vibration test and thermal vacuum testing, as well as the main points of revision.

DOI： 10.52202/078365-0108

Kyutacar

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

The BIRDS-X satellite project introduces Dragonfly, a 2U CubeSat based on the BIRDS Open-Source Bus system, with 100 x 100 x 227 mm dimensions. Developed at the Kyushu Institute of Technology by an international team of students, this satellite is dedicated to amateur radio communication, using a lean satellite approach. It aims to foster inclusivity and democratize space utilization. This paper comprehensively overviews the satellite's subsystem developments and four primary mission advances. These missions include an Automated Packet Reporting System (APRS) payload competition in which five teams from different countries developed a payload and integrated it into the satellite, making it an accessible rideshare opportunity for their payloads to be tested in space, a Ground Terminal (GT) APRS global competition, on-orbit validation of a low-cost UHF transceiver, and a unique volcano monitoring task where while using the APRS protocol, the satellite will store and forward volcanic data for processing and posting. With the launch scheduled for February 2025, this paper presents the steps taken towards achieving the project objectives. This work also highlights its contribution to the evolving CubeSat landscape and amateur radio development while committing to safety standards and operational readiness.

DOI： 10.52202/078365-0113

Kyutacar

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

LEOPARD (Light intensity Experiment with On-orbit Positioning and satellite Ranging Demonstration) is a 3-unit (3U) research CubeSat with various mission objectives such as light-scattering observation over the horizon with a multispectral camera, onboard processing of Earth-origin one-way radio ranging signal (OPERA), single event latch-up (SEL) detection, solar panel deployment demonstration with shape memory alloy (SMA), and measurement of magnetic field independent components of stray and natural fields. The solar panel deployment mechanism utilizes shape memory alloy with a heater to ensure controlled panel deployment. In this paper, the structural design of the LEOPARD CubeSat is presented in addition to the assembly and integration procedures. Furthermore, structural analysis is presented from modal analysis to static load analysis, and the simulation of stress distributions and validation of structural integrity have been performed with finite element analysis. Vibration testing is also conducted to evaluate the system level response to mechanical excitations during launch, ensuring robustness against dynamic loads. LEOPARD used a slot-type design for subsystem integration that has been used in our previous satellites, and the novelty of the structure design comes from the deployment mechanism and method. Finally, the LEOPARD flight model is under testing, and the operation is expected to begin in the second half of 2025.

DOI： 10.52202/078379-0039

Kyutacar

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This study presents the BIRDS-X Ground Terminal Competition, an initiative aimed at generating outreach for the radio amateur community and fostering communication with the Dragonfly satellite. Aligned with the objectives set by Amateur Radio Digital Communications (ARDC), this competition engages amateur radio enthusiasts and rigorously tests the APRS ground terminals (GT) under diverse conditions. Comprising three phases: orientation, communication test, and evaluation, the competition organizes regional communication schedules to optimize the satellite's power budget. During the second phase, participants have a week-long window to establish contact with the satellite, providing log files, elevation data, and power output as evidence. The comprehensive evaluation in the final phase employs a grading system incentivizing compact, versatile, and affordable hardware, promoting accessibility to APRS technology. The established multipliers consider antenna type, station type, elevation angle, and cost. Moreover, two Reference Ground Terminals developed at Kyutech serve dual roles: facilitating performance evaluation for the APRS payload competition and offering technical insights for the Ground Terminal competition parameters. This paper highlights the significance of this competition in advancing the accessibility and performance of APRS technology in satellite communication.

DOI： 10.52202/078378-0127

Kyutacar

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

ISO-19683, “Space systems - Design qualification and acceptance tests of small spacecraft and units” was published in July 2017. The standard describes the minimum test requirements and test methods for lean satellite and their units. The standard has served as a guideline for lean satellite testing for the past five years. The document, however, was made based on the state-of-art knowledge in early 2010s. In the past 10 years, much wider and deeper knowledge regarding the lean satellite testing has been gained. Also, in early 2010s, most of lean satellites was still one of a kind, dealing with a single satellite only. But, nowadays, we see many constellation programs especially in the area of CubeSats. The standard is now under revision process to reflect those points by December 2025. In the revision, the two points; (1) reflecting the state-of-art knowledge based on the experience of the past 10 years, (2) adding a chapter regarding testing of constellation satellite programs, will be considered. For the second points, basic research is being conducted about how to improve the efficiency of testing multiple satellites simultaneously and how to formulate a logic of skipping some tests for satellites of identical design. This paper describes the research results obtained through the basic researches as well as the main points of revision.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In order to understand the dynamics of ionosphere, global 3D ionospheric map that can capture the time fluctuation of the ionosphere is needed. SPATIUM (Space Precision Atomic-clock TIming Utility Mission) project aims at 3D mapping of the ionosphere using a CubeSat constellation. This project was developed collaboratively at Kyushu Institute of Technology and Nanyang Technological University. The objective is to elucidate the dynamic interaction of the atmosphere, ionosphere, and magnetosphere. SPATIUM-II is the second generation of the SPATIUM project. SPATIUM-II occupies 1U (10cm x 10cm x 10cm) volume of KITSUNE 6U single CubeSat which was released from the International Space Station on March 24, 2022. The electrons of the ionosphere result in radio wave propagation time delay. The propagation time delay of ranging signal is proportional to an ionospheric total electron content (TEC). SPATIUM-II aims to process ranging signal, 450MHz, and derive propagation time delay for estimating the TEC. This paper describes the on-orbit result and analysis of SPATIUM-II's TEC measurement mission and the lessons learned for next generation. It was challenging to measure the propagation time delay of ranging signal onboard which was transmitted from the ground. SPATIUM-II performed onboard processing using software defined radio (SDR), microcomputer board (MCB), chip-Scale Atomic Clock (CSAC) and Global navigation satellite system (GNSS) receiver. To derive propagation time delay, SPATIUM-II had two ranging signal receiver modules at the ground station and at the CubeSat. These two modules were synchronized by inserting one pulse per second (1-PPS) of GNSS receiver into the received analog ranging signal. The ranging signal of Spread Spectrum (SS) was despreaded, and the time difference between the rise time of 1-PPS and the time of the header of SS chip pattern was derived at each module of the ground station and the CubeSat. The difference between these each time differences is the measured propagation time. The propagation time delay is calculated by subtracting the propagation time using the speed of light from the measured propagation time.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

The BIRDS program started in 2015 at Kyushu Institute of Technology where young professionals from non-space-faring countries join satellite projects as graduate course students and develop 1U CubeSat with Japanese students. In July 2020, the BIRDS-5 project, the fifth generation of the BIRDS program, began with students from Uganda, Zimbabwe, and Japan. BIRDS-5 project built one 1U CubeSat each for Uganda and Zimbabwe and one 2U CubeSat for Japan in around two years. The BIRDS-5 project applied the Lessons Learned from BIRDS-1, -2, -3, and -4, and improved technology and management points to reduce the development time and cost and avoid making the same mistakes as previous projects. The three satellites were released from the International Space Station (ISS) in December 2022. However, no signals were received from all three satellites since their deployment. The BIRDS-5 team performed Fault Tree Analysis (FTA) for possible causes. Extensive tests were performed using the back-up satellite to replicate the phenomena in orbit. Tests were repeated to deny any unnoticed issues during the satellite development. This paper describes the improvements made by the BIRDS-5 project based on the heritage from the previous projects and summarizes the unpredicted issues that appeared in the BIRDS-5 project. In addition, the results of the failure investigation and suggestions to prevent future projects from making the same failures are also detailed. This study will be beneficial for all the small satellite developers as lessons learned while developing satellites using commercial-off-the-shelf components in a limited time.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

This paper presents the in-orbit results of a commercial-off-the-shelf (COTS) imaging payload deployed on the BIRDS-4 1U CubeSat constellation. The BIRDS-4 Satellite project, hosted at the Kyushu Institute of Technology, aims to develop Paraguay's first satellite while enhancing the standardized bus system for future missions. The imaging payload, utilizing proven components, consists of a microcontroller, dedicated flash memory, and a camera module with a modified lens. Mission-specific software complements the hardware, enabling various mission modes. The imaging payload achieves a 5MP camera resolution, a 125-degree diagonal field of view, a 1000km ground swath, and a 300m ground resolution. The paper provides detailed information about the payload design, mission modes, and specifications. The flight model successfully underwent ground tests, including thermal vacuum, vibration, and long-duration tests, validating its functionality. In orbit, the payload executed several mission modes, and images were downloaded through the BIRDS-4 ground station network. While the mission achieved medium success, capturing low-resolution images of Earth with identifiable land masses and images during release from the International Space Station (ISS), lessons learned were identified for future missions, such as improved satellite pointing, extended access time for image transfer, and enhanced mission execution commands. Noteworthy images, including Salar de Uyuni in Bolivia, the Parana River in Latin America, Shikoku Island in Japan, and a photo of the ISS and Earth, were captured and distributed for promotional and outreach activities. The obtained images, totaling 89 with 81 successfully downloaded, range from 3kB to 99kB in size, comprising 2.33 MB of data. The images were categorized into Earth, Solar Flare, Space, and Unknown. The paper concludes by highlighting the application of lessons learned in the subsequent iteration of the satellite developed locally by a new team from the Philippines.

DOI： 10.1109/IGARSS52108.2023.10281857

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

BIRDS-X satellite project is a 2U CubeSat named Dragonfly based on the BIRDS Open-Source Bus design. The satellite is dedicated to amateur radio communication. It has external dimensions of 100 × 100 × 227 mm and is being developed at the Kyushu Institute of Technology (Kyutech) by a multinational team of students from different backgrounds and levels of education. The project aims to bring diversity to the space sector and democratize space usage while following a lean satellite approach. This paper presents a general overview of the satellite subsystems and their four main missions. The first mission is a global Automated Packet Reporting System (APRS), the second is a Ground Terminal (GT) competition, and the third is the development and on-orbit validation of a new low-cost UHF transceiver designed by one of the team members. The fourth mission is a volcano monitoring task, using the satellite as a platform to store and forward volcanic data using the APRS protocol.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

A flight-proven electrical bus system for the 1U CubeSat platform was designed in the BIRDS satellite program at the Kyushu Institute of Technology. The bus utilizes a backplane board as the mechanical and electrical interface between the subsystems and the payloads. The electrical routes on the backplane are configured by software using a complex programmable logic device (CPLD). It allows for reusability in multiple CubeSat projects while lowering costs and development time; as a result, resources can be directed toward developing the mission payloads. Lastly, it provides more time for integration and system-level verification, which are critical for a reliable and successful mission. The current trend of CubeSat launches is focused on 3U and 6U platforms due to their capability to accommodate multiple and complex payloads. Hence, a demonstration of the electrical bus system to adapt to larger platforms is necessary. This study demonstrates the configurable electrical interface board’s scalability in two cases: the capability to accommodate (1) multiple missions and (2) complex payload requirements. In the first case, a 3U-size configurable backplane prototype was designed to handle 13 mission payloads. Four CPLDs were used to manage the limited number of digital interfaces between the existing bus system and the mission payloads. The measured transmission delay was up to 20 ns, which is acceptable for simple serial communications such as UART and SPI. Furthermore, the measured energy consumption of the backplane per ISS orbit was only 28 mWh. Lastly, the designed backplane was proven to be highly reliable as no bit errors were detected throughout the functionality tests. In the second case, a configurable backplane was implemented in a 6U CubeSat with complex payload requirements compared to the 1U CubeSat platform. The CubeSat was deployed in ISS orbit, and the initial on-orbit results indicated that the designed backplane supported missions without issues.

DOI： 10.3390/app12188964

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

1U CubeSats often use the 430-MHz band for communication due to their size and power limitations, and half-wavelength dipole antennas are employed. A 430-MHz-band dipole antenna requires a deployable structure for a 1U CubeSat. However, a 1U CubeSat has a small volume margin for redundant systems, so the antenna deployment system can be a single point of failure. In this paper, the 1U CubeSat structure itself was used as an antenna. As a sub-mission of the BIRDS-4 project, three 1U CubeSats (GuaraniSat-1, Maya-2, and Tsuru) demonstrated this antenna structure. The results of the ground tests showed a maximum gain of −5.7 dBi with the flight model. These satellites were deployed from the International Space Station on 14 March 2021. Radio signals were alternately transmitted from the dipole antenna and the structure antenna onboard Tsuru for on-orbit demonstration on 15 December 2021, and the received signal strength on the ground was compared using RTL-SDR, SDR# and several codes. The ground station was able to receive both dipole and structure CW signals. The received power strength indicates that a gain of −8.1 dBi is being demonstrated with the structure antenna.

DOI： 10.3390/electronics11071163

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： https://doi.org/10.15866/irease.v15i1.21136

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

As part of the BIRDS satellite program, the BIRDS-4 satellites were launched on February 21, 2021. The prime objective of Electrical Power System (EPS) in a CubeSat is to provide continuous power to all subsystems and payloads during the satellite's lifetime. While the satellites performed satisfactorily on-orbit, several points of failure in the EPS were noted based on the on-orbit operation of BIRDS-4 satellites despite extensive testing on the ground. This study aims to identify the issues of the power system failure and reasons that caused these failures in orbit. One of the major mistakes that was observed in these constellations were the workmanship error in the assembly of the solar cells that led to failure of one or more sides of solar panels on-orbit. This caused imbalance in the power budget. In this study, the authors analysed the housekeeping data of BIRDS-4 satellites. This paper also summarizes the lessons learnt based on the operation of the satellites on-orbit and recommendations on the testing procedure for EPS that could be resourceful for other lean satellite developers.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

<p>The BIRDS series from Kyushu Institute of Technology has deployed 1U CubeSat constellations from International Space Station since 2017. BIRDS-3 was deployed in June 2019. Lessons learnt from BIRDS-1 and BIRDS-2 have been used to improve the bus system of BIRDS-3. Improvements have been made in On-Board Computer, Electrical Power and Communication systems. BIRDS-3 has implemented novel Backplane Mission which uses SoftCIB; an in-house designed software defined backplane interface board. The mission has the potential to standardize interface and cut down on development time. BIRDS-3 project has placed a LoRa module to check its performance in space. The module has the potential for future low-cost, low-powered Store and Forward mission and CubeSat communication system. This paper provides detailed information on the improved BIRDS bus system, LoRa Demonstration and Backplane Mission designs, and on-orbit results since its deployment in June 2019. The results presented are based on cumulative operation time of three years for three satellites operating each for a year. The satellites are functional and will remain in orbit until summer of 2021.</p>

DOI： 10.2322/tjsass.65.213

Scopus

CiNii Research

その他リンク： https://kyutech.repo.nii.ac.jp/records/2000317

記述言語：英語   掲載種別：研究論文（学術雑誌）

Satellite signal delays and errors depend on the amount of ionosphere Total Electron Content (TEC) in the signal path. The measurement of TEC has been mostly done using Global Navigation Satellite System (GNSS) signals. Signals from a satellite orbiting in lower altitude with lower frequencies than GNSS may provide more precise measurement of Total Electron Content (TEC). Space Precision Atomic Clock Timing Utility Mission (SPATIUM) is a program to do three-dimensional ionosphere mapping by a satellite constellation in Low Earth Orbit (LEO) measuring TEC with Ultra High Frequency (UHF) radio signals. The first technology demonstration satellite called SPATIUM-I, a 2U CubeSat, was deployed from the International Space Station in October 2018. The satellite emits a 467-MHz reference signal generated by a chip scale atomic clock. The signal is Spread Spectrum (SS)-modulated with 250 chips in 4 ms. This paper explains the methodologies and their results of detecting the signal time delay on the ground using a Software-Defined Radio (SDR). To improve the precision, a Global Positioning System (GPS) clock was used to put a time stamp on the satellite signal every 1 s. The time difference of two consecutive signals is the key method for deriving the TEC difference between two signal paths.

DOI： 10.15866/irease.v15i1.21136

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

The BIRDS-4 satellites are the fourth generation of 1U CubeSats developed in Kyushu Institute of Technology (Kyutech), Japan. Kyutech has been deployed 1U CubeSats annually since 2017. It is called the BIRDS satellites series. BIRDS-4, a constellation of three 1U CubeSats, was released on 14th March 2021 from the International Space Station (ISS). The electrical power system (EPS) of BIRDS-4 needed to be modified to adopt the safety regulation changes that occurred after BIRDS-4. This paper explains how the satellites ensure the satellite's safety as required for satellites to be deployed from the ISS. This paper explains how the safety requirements for satellites were ensured from BIRDS-4, an additional deployment switch has been added to provide the three inhibits against the new cold launch requirement. This paper focuses on how deployment switches completely regulate the satellites by using inhibiting switches in the EPS circuit. Protection from over-charge, overdischarge, and external short hazards to the satellite's battery has been confirmed. Several ground tests were carried out for the BIRDS-4 Flight Model (FM) satellites, and the results of the verification are presented. Similarly, acceptance and verification tests were carried out for commercial-off-the-shelf (COTS) solar cells and batteries(cells). Inhibit verification test was conducted with the FMs by controlling 3 deployment switches that function as inhibit. To check the deployment switches actual functionality in the FM, inhibit functionality was also checked during the fit check. It was verified that the solar cells could not produce electricity inside the pod. The battery's charging line is completely isolated from the solar source by the electromechanical switches. The satellites were only being turned on 30 minutes after they have been deployed from the ISS. After going through the four generations of ISS deployment, the BIRDS EPS design now can serve as a standard 1U EPS design in compliance with ISS safety requirements.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

There are many satellites and simulation models for measuring ionospheric plasma density; however, there is currently no global 3-dimensional ionospheric map that can capture the time fluctuation of the ionosphere. The SPATIUM project (developed by Kyushu Institute of Technology and Nanyang Technological University) aims at 3- dimensional mapping of the ionosphere using a CubeSat constellation. The project objective is to elucidate the dynamic interaction of the atmosphere, ionosphere, and magnetosphere. This paper describes the system developed for measurement of the total electron content (TEC) of the ionosphere using the SPATIUM-II satellite, which is the second generation of the SPATIUM project. SPATIUM-II occupies 1U of volume and performs the onboard processing of the ranging signal from the ground station (GS) using Chip-Scale Atomic Clock (CSAC), GPS receiver, software defined radio (SDR) and Raspberry Pi (RPi) for measurement of TEC. The electrons of the ionosphere result in radio wave propagation time delay. The propagation time of ranging signal is proportional to TEC. CSAC is used as a precise clock. CSAC and GPS receivers are installed in both the GS and the SPATIUM-II satellite. The 1- PPS (one pulse per second) signal of GPS receiver is used for timing synchronization and measurement of the propagation time delay of ranging signal. The ranging signals are time-synchronized by RF switch and 1-PPS signal, and then received by SDR. The signal is A/D-converted by SDR and transferred to RPi as a digital signal. This digital signal is processed in the RPi for measurement of the TEC. This TEC measurement system has been successfully developed and verified by ground tests. The flight model is complete and ready for delivery. It is scheduled to be launched in late 2021 or early 2022.

Scopus

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担当区分：最終著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Interaction with the solar wind and UV/X-ray irradiation can cause the lunar dust to be electrostatically charged and mobilized all around the Moon, and light scattering by this dust cloud can be observed over the lunar terminator. This phenomenon, which has also been called the lunar horizon glow (LHG), still remains unexplained. The LHG observations using conventional lunar probes have limited observation opportunities and do not cover varying space weather conditions in cislunar environment such as strong upstream plasma flow and micrometeoroid flux that could enhance the lunar dust presence in the exosphere. The nanosatellite “HORYU-6” specialized in LHG observations will be put into lunar orbit to detect the light scattering above the lunar terminator. The proposed payload will perform multi-spectral imaging to monitor the lunar horizon several minutes before orbital sunrise or after orbital sunset for light scattering analysis. We show that we can obtain scientific results of lunar and planetary exploration using CubeSat at low cost and in a short period of time, and contribute to the development of lunar and planetary exploration in the future. The spacecraft will be developed jointly with universities in Singapore, the United States and Italy under the supervision of Kyushu Institute of Technology, with the aim of launching the SLS-2 rocket in the second half of 2022. Together with its own scientific objectives, the HORYU-6 mission will demonstrate the low thrust trajectory optimization by utilizing electric propulsion system together with other novel embedded technology demonstrations such as atomic clock, deep space navigation and communication with CubeSats.

Scopus

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

In 2019, a new project to standardize the CubeSat interface started. Discussion has been made utilizing various gathering opportunities of the CubeSat community. A survey on the CubeSat interface has been distributed the CubeSat community to collect the satellite developers' experience and desires regarding the interface, and the CubeSat vendors' reality and desires. A research work to identify the difficulties associated integrating CubeSat components from different vendors is on-going. Initial finding suggests that clear definition of interface related information, especially the digital data communication, in the user manual is really needed. A table of content of the standard has been drafted, which is mainly made of four parts. (1) Interface among components, (2) Interface between CubeSat bus (platform) and mission payloads, (3) Document specification to describe the information related to component interface, (4)Document specification to describe the information related to CubeSat bus (platform) interface. The project aims at submitting a new work item proposal to ISO/TC20/SC14 in summer 2021 and publish the standard by 2024.

Scopus

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

記述言語：英語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

記述言語：英語   掲載種別：研究論文（学術雑誌）

主要雑誌 代表的研究業績

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

Matsue   2008年10月28日  -  2008年10月31日

記述言語：英語   掲載種別：研究論文（その他学術会議資料等）

Matsue   2008年10月28日  -  2008年10月31日

記述言語：日本語   掲載種別：研究論文（学術雑誌）

主要雑誌

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Sweden   Stockholm   2007年07月  -  2007年07月

主要論文集（会議） 代表的研究業績

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Germany   2005年04月  -  2005年04月

代表的研究業績

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

2005年04月  -  2005年04月

主要論文集（会議） 代表的研究業績

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：日本語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

開催期間： 2008年09月11日 - 2008年09月13日   記述言語：日本語   開催地：日本 岡山  

開催期間： 2008年09月02日 - 2008年09月05日   記述言語：日本語   開催地：日本 愛知県  

開催期間： 2008年07月02日 - 2008年07月06日   記述言語：英語   開催地： Sweden Stockholm  

開催期間： 2008年06月21日   記述言語：日本語   開催地： 福岡  

開催期間： 2008年06月21日   記述言語：日本語   開催地： 福岡  

開催期間： 2008年06月21日   記述言語：日本語   開催地： 福岡  

開催期間： 2008年06月13日   記述言語：日本語   開催地：日本 福岡  

開催期間： 2008年06月13日   記述言語：日本語   開催地：日本 福岡  

開催期間： 2008年06月13日   記述言語：日本語   開催地：日本 福岡  

開催期間： 2008年03月26日 - 2008年03月28日   記述言語：日本語  

開催期間： 2008年03月25日 - 2008年03月28日   記述言語：日本語  

開催期間： 2008年03月23日 - 2008年03月26日   記述言語：日本語  

開催期間： 2007年03月   記述言語：日本語  

開催期間： 2007年03月   記述言語：日本語  

開催期間： 2006年11月   記述言語：日本語  

開催期間： 2006年03月   記述言語：日本語  

開催期間： 2005年11月   記述言語：日本語  

開催期間： 2005年09月   記述言語：日本語  

開催期間： 2005年03月   記述言語：日本語  

開催期間： 2004年06月   記述言語：日本語  

開催期間： 2003年10月   記述言語：日本語  

開催期間： 2003年06月   記述言語：日本語  

開催期間： 2003年06月   記述言語：日本語  

開催期間： 2003年03月   記述言語：日本語  

開催期間： 2002年06月   記述言語：日本語  

開催期間： 2002年03月   記述言語：日本語  

開催期間： 2001年03月   記述言語：日本語  

開催期間： 2000年06月   記述言語：日本語