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Studyon Human body Motion Interface
Sho Yokota,Hiroshi Hashimoto,Yasuhiro Ohyama,Jin-Hua SHE,Daisuke Chugo,Hisato Kobayashi,Pierre Blazevic 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The joystick is the operation interface of electric wheelchair. The user needs to operate it in accordance with machine’s operational procedure specifications. Therefore the joystick is convenience operation system for the system side rather than the user side We focus on the body motions which humans have, and tryto realize a new type of interface which replaces conventional joystick. There is a body motion which comes from in stinctive adjustment functions to control changes of body shape caused by voluntary actions. We use this kind of motion as an interface and call it HBMI(Human Body Motion Inerface). In this paper, we set a prototype based on the experiment for deriving a suitable measurement to detect human body motion. The evaluation of HBMI by using SD method is also presented.
Hand Pose Estimation from Camera Images of Ring-shaped Markers
Akinori Sasaki,Sho Yokota,Yasuhiro Ohyama,Hiroshi Hashimoto 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper describes hand pose estimation from camera images of ring-shaped markers. The ring-shaped markers are employed to more simplify the measurement than measurement with conventional reflective markers. Using results of the pose estimation of the ring-shaped markers, the entire finger poseis estimated with an atomical constraints on finger kinematics.
Quasi-Zenith Satellite System (QZSS)-Outline and its time related mission
Hama, shinichi,Takahashi, Yasuhiro,Amagai, Jun,Ito, Hiroyuki,Morikawa, Takao,Yokota, Shouichirou,Fujieda, Miho,Kimura, Kazuhiro 통신위성우주산업연구회 2005 Joint Conference on Satellite Communications Vol.2005 No.-
Japan has started a project of Quasi-Zenith Satellite System (QZSS) since FY2003. QZSS will be highly useful not only for communications but for complement of the modernized GPS in urban canyon and mountainous area with its high visibility brought out by its inclined orbits. National Institute of Information and Communications Technology, Japan (NICT) is to develop a Space-borne Hydrogen Maser (SHM) and time management system, and carry out experiments using them. A breadboard model (BBM) of the SHM was developed to overcome the issues such as size, weight and life time, which are required in space environment. Basic design was carried out for time management system to achieve nano second level time transfer. The design and the manufacturing of the engineering models (EM) of the on-board equipment have been carried out since 2004. The first satellite is planned to be launched in FY 2008.
Kim, Sung-Won,Jo, Min-Young,Yokota, Yasuhiro,Chung, Yun-Jo,Park, Chung-Ung,Kim, Kyung-Suk Korean Chemical Society 2004 Bulletin of the Korean Chemical Society Vol.25 No.2
Recombinant human ferritin homopolymers (rHF and rLF) were successfully produced in the Saccharomyces cerevisiae Y2805, which was transformed with human ferritin H or L-chain genes, respectively. In order to characterize the molecular properties of the recombinant ferritins in relation to mineralization, the proteins were isolated and apoferritins were prepared. The apoferritins were reconstituted with 2000 Fe atoms per protein molecule under various experimental conditions (the concentration of the protein, the buffer concentration of the MOPS buffer, the total volume of the reaction and the reconstitution method). The structure and composition of the iron cores formed in the ferritins were examined using transmission electron microscopy. The recombinant ferritins behaved in a similar manner to other mammalian ferritins in accumulating iron in the core. Proteins of rHF and rLF showed varying reconstitution yields of 37-72% depending on the reaction conditions. In general, the rHF showed higher reconstitution yield than the rLF at the protein concentrations and the reaction volumes we examined. Iron cores with a similar mean particle size were obtained in the rHF, rLF and horse spleen ferritin reconstituted at a protein concentration of 1.0 mg/mL. Electron diffraction of all the three ferritins showed 2-3 diffuse lines, with d-spacings corresponding to those of the mineral ferrihydrite with a limited crystallinity.
Mazlina Razali,Mohd Ashraf Mohamad Ismail,Andrew Lee Kwan Yee,Raja Asyraf Azizan Raja Adnan,Kenichi Kawano,Kensuke Date,Yasuhiro Yokota,Sharan Kumar Nagendran,Zuraini Zainal 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.8
The in-situ elastic modulus (E) is a vital parameter for describing rock strength in many engineering projects on rock slopes. The elastic modulus and uniaxial compressive strength (UCS) are typically investigated via laboratory tests using core samples. However, the direct determination of E is costly and time-consuming in preparing many intact samples from highly weathered Setul limestone. The knocking ball testing method is a non-destructive test that can quickly and easily obtain the elastic modulus of rock in-situ by striking the surface of a rock mass with a spherical steel hammer. This study presents the relationship between the elastic modulus of knocking ball (Ekb) and the uniaxial compressive strength of the Schmidt hammer (UCS-Schmidt). Results show that the regression coefficient correlation, R2 is 0.851, indicating a positive trend with a few outliers. The measured Ekb were also verified with mineral propertiesand correlated to differential weathering grades to confirm the accuracy of measurement results. The finding compared to previous similar studies tested on several types of rock show a statistically significant. This research highlights the effectiveness of the knocking ball method for determining the modulus of rock slope at different weathering grades. A high elastic modulus corresponds to a high uniaxial compressive strength, verified by the laboratory test. This study shows that the knocking ball can be useful for predicting in-situ elastic modulus.