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reliability study of a New Electromechanical Device Designed to Measure the Relative Dorsal Mobility of the First Ray of the Foot

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Open Journal of Orthopedics 2022年第10期12卷 383-392页

作者： Nils Reymond Quentin Praz Spyridon Schoinas Navindravadhanam Sockalingam Antoine Acker Victor Dubois-Ferrière Philippe Passeraub Mathieu Assal Centre Assal for Foot and Ankle Surgery Clinique La Colline Geneva Switzerland Institute of Industrial Technologies and Sciences University of Applied Sciences and Arts Western Switzerland (HES-SO Geneva/HEPIA) Geneva Switzerland

Introduction: A new electromechanical instrument has been developed to measure relative dorsal mobility of the first ray in an objective and reliable way by simulating ground reaction forces during gait. This device equally applies a standardized, electronically controlled, and precise force under the first metatarsal head M1 as well as under the heads of the lesser metatarsals M2 to M5. The relative dorsal mobility between these two bearings is then measured. The purpose of this study is to assess the intra- and inter-examiners reliabilities of the measurements obtained with this device. Methods: The protocol included two examiners and 36 feet (18 volunteers with healthy feet and no history of forefoot disorders). A total of nine measurements were performed on each foot separated into three sets of three trials for the assessment of inter-rater and intra-rater reliability. For this purpose, the interclass correlation coefficient (ICC), the error of measurement (SEM) and the Bland and Altman (B&A) graphical analysis were computed. Results: Excellent ICC values (≥0.91) were obtained with the novel device for inter-rater and intra-rater reliability when using the FRRM calculation. The B&A analysis presented a bias between examiners of -0.25 mm ranging from -1.66 to 1.18 mm. Conclusion: This study demonstrated the capability of the developed device to reliably measure the relative dorsal mobility of the first ray of the foot. This is a promising first step for further studies to better understand, qualify and quantify first ray hypermobility.

关键词： First Ray Dorsal Mobility Instability Hypermobility Medical Device reliability study Foot

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reliability of paste fill system of the Jinchuan No.2 mine

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Journal of University of Science and Technology Beijing 2002年第3期9卷 166-169页

作者： Sijing Cai and Changjie ChenCivil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China (Received 2001-10-24) Civeil and Environmental Engineering School University of Science and Technology Beijing Beijing 100083 China ***

Because of poor ground conditions, stoping methods of underhand headings withcemented fill were used in the Jinchuan No. 2 mine, a paste fill system was set up. In order toevaluate the reliability of the new system, investigations and trial running have been done. Morethan 20 items of modification or improvements related to paste preparation subsystem, pump and pipesubsystem, auto-controlling and monitoring subsystem were finished. The reliability of the pastefill system was analyzed by using the theory of large complex system, and it is useful inreliability study on paste fill system.

关键词： paste fill system reliability study complex system theory

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Numerical study on the Probability of Fatigue Failure of a Semi-Submerged Platform Structure

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China Ocean Engineering 1994年第4期9卷 377-386页

作者： Yu Jianxing, Hu Yunchang , Wang Yehong and YuHongjie Associate Professor, Tianjin University, Tianjin, 300072 Professor, Tianjin University, Tianjin, 300072 Postgraduate for Master Degree, Tianjin University, Tianjin, 300072

On the basis of Miner's linear cumulative damage theorem, random variables are introduced to evaluate objectively the fatigue damage of a semi-submerged platform structure and a method is presented to analyze the fatigue reliability of the structure in its design life. The reliability of the method is verified through numerical examples and some conclusions are drawn, which have certain guiding and reference value for design and inspection.

关键词： semi-submerged platform fatigue failure random variables reliability study

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