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RISS 인기검색어
- 검색키워드
- 저자 : Soumen Sen (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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Das, Soumen,Sen, Santanu,Mukherjee, Anindya,Chakraborty, Debadatta,Mondal, Pankaj Kumar Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.10
Aim: Breast cancer is one of the most common cancers of women in India with high fatality rate. Over a 1 year study period 105 consecutive biopsy or fine needle aspiration cytology confirmed breast cancer patients were interviewed by direct questionnaire method regarding risk factors attending Surgery and Radiotherapy OPD of Medical College Kolkata, West Bengal while taking other 105 patients attending Surgery Department for some other disease as controls. The data were compiled in MS Excel 2007 and analyzed by Epi info 3.5.1 software. Among the cases, rural residence, illiteracy and low socio-economic status was significantly higher than controls. Late onset of menarche, late onset of menopause, ever OCP usage, breast feeding for 1-2 years and age of 1st childbirth between 20-30 years were found to be significant protective factors. People should be made aware regarding the modifiable risk factors to prevent breast cancer.
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김수영,김선재,김병규,Soumen Sen 항공우주시스템공학회 2020 항공우주시스템공학회지 Vol.14 No.2
Many countries and international organizations have carried out rover missions to explore planetary surfaces. Accordingly, the demand for mechatronics education, which is closely related to building exploratory robots, is also steadily increasing. However, due to the complexity in understanding the background information needed for mechatronics, it is hard for pre-college students to study such process. In this study, we suggest an educational platform for mechatronics using a combined robot kit with a spherical robot and a smartphone application. To provide a visual understanding, the dynamic model of the robot is constructed while analyzing the error between actual driving and a simulation, and the educational algorithm of the game and a feedback method are proposed to improve the learning efficacy by considering the user’s level of knowledge of mechatronics. We use this educational spherical robot to develop a curling game platform that can impart engineering education even when students lack significant knowledge.
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Debadrata Sarkar,Sagnik Chakraborty,Aman Arora,Soumen Sen 제어로봇시스템학회 2021 제어로봇시스템학회 국제학술대회 논문집 Vol.2021 No.10
Physically interactive applications like tissue sampling have become essential in present day minimally invasive endoscopy/colonoscopy applications. This calls for specialized steering heads with force exertion ability, still maintaining simplified actuation mechanisms having inherent softness and steerability. This article presents development of soft hyperelastic material (silicone) based pneumatically actuated steering head with improved performance achieved through O-ring reinforcements. The design attains omnidirectional bending operations as well as extension capability enabling needle insertion by the steering head. The ring reinforcement not only contains the bulging effect but also enhances extension ability and range of bending. Additionally, it improves stiffness, structural stability and force exertion capability. The presented work implements two layer design principle - the inner actuator is made from silicone of harder shore hardness followed by a thin outer layer of softer silicone, embedding the O-rings in between. The steering head has been designed iteratively through in depth Finite Element modeling and analyses after obtaining material models of silicones experimentally. The actuator has undergone detailed characterization through simulation for its workspace and blocked-tip force capabilities at various configurations. The characteristics have been experimentally validated on the developed prototype.
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Aman Arora,Debadrata Sarkar,Amit Kumar,Soumen Sen,Shibendu Shekhar Roy 대한기계학회 2022 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.36 No.9
Compliant actuators have received much attention from researchers over the last two decades. Specifically, pneumatic artificial muscles (PAMs) have been used in several human-in-loop assistive and rehabilitative devices due to their inherent behavior resembling biological muscles. We presented a lucid customizable fabrication process to develop lowpressure actuated PAMs, named pneumatic silicone tube artificial muscles (pSTAMs), and to cater activity-specific actuator requirements. Two constructions of pSTAMs with varying lengths were rigorously experimented at different pressure-load conditions for their isobaric static and stiffness characterizations. Estimation of bandwidth and use of empirical correction factors in the conventional analytical models for quasi-static characterization of pSTAMs were demonstrated. Lumped parameter-based phenomenological model was employed to closely model their dynamic characteristics. A detailed integrated electromyography analysis with surface electromyography signals from the targeted muscle groups was performed to determine the efficacy of using pSTAMs in two activities.
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