Faculty Profiles - ODA Masafumi

Direct Linear Transformation Technique for Non-Contact Eye-Gazing Point Detection : 2nd Report, Improving the Detecting Technique via Two Dimensional Multi Resolution Analysis Reviewed

Non-Contact Eye-Gazing Point Detection Technique via Two Dimensional Multi Resolution Analysis

TETSUTANI Kiyokazu, SHUTO Yuriko, ODA Masafumi, ISOMURA Tsuneshi, SEKIGUCHI Yukio, HARA Toshiaki

Proceedings of the JSME Bioengineering Conference and Seminar 2000 31 - 32 2000

ODA Masafumi, SANADA Nozomi

The Life Support Technorogy 11 ( 3 ) 80 - 85 1999.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Life Support Engineering

The purpose of this study is to detect eye-gazing points during driving a wheelchair through the image sequence analysis of video frames.The performances can be measured without restrictions of specific devices such as any accessories and sensors,which were put on a body.Images obtained with three video cameras allow the algorithm to extract four feature points on a face and irises.Their three-dimensional positions were estimated through direct linear transformation(DLT)technique with magnification of a facial image through wavelet analysis.The direction of a face was estimated via three-dimensional positions the former,and it defined the facial coordinate.On the other hand,the eye-gazing point was evaluated through three-dimensional positions of the latter.Consequently,Some preliminary results were presented to illustrate the difference in variations with the eye-gazing point between driving a wheelchair and walking .

DOI： 10.5136/lifesupport.11.80

Ultrasonic technique for contact mechanism estimation of an artificial hip joint Reviewed

Masafumi Oda, Tasuku Kanomata, Toshiaki Hara

JSME International Journal, Series C: Mechanical Systems, Machine Elements and Manufacturing 42 ( 3 ) 560 - 567 1999

Language：English Publishing type：Research paper (scientific journal) Publisher：Japan Society of Mechanical Engineers

Ultrasonic techniques were developed to study the characteristics for contact mechanics of an artificial hip joint. Total Hip Replacement model was used to determine contact pressure distribution on an artificial aceptabular cup subjected to compressive load ranged from 196 N to 588 N in four femur positions. The contact pressure was found to be non-uniform and reaches more than 6 MPa. It was shown that the tendency of the pressure distribution is in agreement with that obtained by the computer simulation. Some preliminary results were also presented to illustrate the effect of the direction and the magnitude of the load applied to a femoral head on the contact pressure distribution on the aceptabular cup and to evaluate the contact mechanism of the artificial hip joint.

DOI： 10.1299/jsmec.42.560

Scopus

Ultrasonic Technique for Contact Mechanism Estimation of an Artificial Hip Joint Reviewed

ODA Masafumi, HARA Toshiaki

Transactions of the Japan Society of Mechanical Engineers. A 64 ( 624 ) 2093 - 2099 1998.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers

An ultrasonic techniques was developed to study the characteristics for contact mechanics of an artificial hip joint. Total Hip Replacement model was used to determine contact pressure distribution on an artificial aceptabular cup subjected to compressive load ranged from 196 N to 588 N in four femur positions. The contact pressure was found to be nonuniform and less than 6 MPa. It was shown that the tendency of the pressure distribution is in agreement with that obtained by the computer simulation. Some preliminary results were also presented to illustrate the effect of the direction and the magnitude of the load applied to a stem on the contact pressure distribution on the aceptabular cup and to evaluate the contact mechanism of the artificial hip joint.

DOI： 10.1299/kikaia.64.2093

Other Link： https://jlc.jst.go.jp/DN/JALC/00085215993?from=CiNii

Ultrasonic Technique for Contact Mechanism Estimation of an Artifical Hip Joint Reviewed

ODA Masafumi

The Life Support Technorogy 10 ( 3 ) 111 - 118 1998.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Society of Life Support Engineering

An ultrasonic technique was developed to study the characteristics for contact mechanics of an artificial hip joint. Total Hip Replacement model was used to determine contact pressure distribution on an artificial aceptabular cup subjected to compressive load ranged from196N to 588N in four femur positions. The contact pressure was found to be nonuniform and less than 6MPa. It was shown that the tendency of the pressure distribution is in agreement with that obtained by the computer simulation.Some preliminary results were also presented to illustrate the effect of the direction and the magnitude of the load applied to a stem on the contact pressure distribution on the aceptabular cup and to evaluate the contact mechanism of the artificial hip joint.

DOI： 10.5136/lifesupport.10.111

超音波法による摺動時の摩擦力評価 Reviewed

尾田雅文

職業能力開発報文誌 9 ( 2 ) 17 - 24 1997.10

鋼－セラミクス摺動時の摺動初期における摩擦応力解析

尾田雅文

新潟職業能力開発短期大学校紀要 3 8 - 13 1997.3

Adhesion Evaluation of TiN Film by Acoustic Emission Technique Reviewed

ODA Masafumi, HARA Toshiaki

Transactions of the Japan Society of Mechanical Engineers. A 62 ( 595 ) 865 - 871 1996.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers

An acoustic emission (AE) technique was developed to study the adhesional characteristics of TiN thin film deposited on SKD and SKH steel using plasma CVD technique. Pin-on-disk type wear testing machine with acoustic emission sensor was used to measure the relationship between the AE count rates monitored through the pin and the wear rate of the steel materials deposited by the thin film and to investigate the adhesional strength of the film. In addition, the applicability of the Root Mean Square (RMS) value derived from the AE signal to the evaluation of the wear and frictional properties of the steel was discussed, The experimental results showed that the relationship between the wear rate and the RMS value was significantly dependent upon the mechanical properties of the pin with a deposition of the film. The frictional coefficient derived from the interface between the pin and the disk increased slightly with an increase in the amount of indentational load applied to the pin. It may also mentioned that the present results demonstrate sufficient promise of the ability of the AE technique to be applied to the evaluation of the thin film deposited on metallic materials.

DOI： 10.1299/kikaia.62.865