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Design of the VSA (Variable Stiffness Actuator) Mechanism Using Cam Shape
장시영(Si young Jang),송윤혜(Yun hye Song),백윤수(Yoon Su Baek) Korean Society for Precision Engineering 2019 한국정밀공학회지 Vol.36 No.7
As the exoskeleton robot for the assistance of walking is on the rise, HRI (Human-Robot Interaction) come to be an important issue. So in this research the angle following Variable Stiffness Actuator by using cam for overcoming the limitation of volume and weight in existing mechanisms. For this mechanism determinant of stiffness is not an absolute value but it can be change from zero to rigid by the location of the pivot in the gage between the application point of the input force and output force. So it can be miniaturized and have the volumetric advantage by kinematic design. This variable stiffness system make the HRI effective and the safety from injury resulted from the malfunction and the wrong control can be guaranteed.
프로젝트 상급자 특성이 프로젝트관리자의 보고 성향과 시스템 개발성과에 미치는 영향
장시영(Si Young Jang),오만석(Man Seok Oh) 한국데이타베이스학회 2012 Journal of information technology applications & m Vol.19 No.2
This study explores the reporting tendencies of project managers when sending a status reports to their respective senior managers in information systems development project. It also examines the effect of selective reporting on report quality and systems development performance. The research model is proposed based on literature survey as well as key points from Iacovou et al. [2009] which is an extension of selective reporting in information systems project. Analysis of responses from 257 project managers in information systems industry indicates that pessimistic reporting by project managers has negative effect on both report quality (mediator variable) and systems development performance, while optimistic reporting has no significant effect on systems development performance. The CEO interest has an impact on the senior manager's power, which in turn leads to optimistic reporting by project managers. The senior manager's character has an impact on the senior manager's leadership, which in turn leads to pessimistic reporting. No direct relationship exists either between CEO interest and optimistic reporting or between senior manager's character and pessimistic reporting. In addition, trust toward the senior managers is significantly related to pessimistic reporting. Finally, report tendencies are also found to be affected by the active/passive characteristics of project managers.
장시영 ( Si-young Jang ),류홍 ( Hong Ryu ),강현숙 ( Hyeon-suk Gang ),박승준 ( Seung-jun Park ),이기택 ( Gi-taek Lee ),이헌재 ( Heon-jae Lee ),김은수 ( Eun-soo Kim ) 사단법인 대한문신사중앙회 2020 한국문신연구학회지 Vol.1 No.1
The purpose of this study is to identify pain measures and factors that can alleviate pain in tattoo service customers and to identify the effects of each factor on pain relief, providing information to alleviate pain experienced by the procedure. To achieve this research goal, a survey was conducted on 1,008 people who had experience in tattooing from October 02 to November 12, 2020. According to the study, the pain scale of customers using tattoo service was identified and statistically confirmed that reliability, music, and lighting as pain relief factors have a significant effect on reducing the pain scale of the fascist.