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박지형(Jihyung Park),김윤선(Yoonsun Kim),이중호(Joongho Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
Collaborations among product designers have become important issues as the manufacturing environments have been globalized. This system provides several functionalities essential in collaborative design process such as schedule management, document management, collaborative conference, and product inspection. In addition, it provides process templates to effectively manage completed works of collaboration and to easily start a new collaborative work. The proposed process management system is designed and developed using ooCBD(object oriented component-based development) methodology adopting MVC pattern for efficient maintenance and upgrade.
미디어 서비스 플랫폼에서의 사용자 행동 유형에 따른 CBF 추천 효과성 분석
박지수(Park Jisoo),박지형(Park Jihyung),이상범(Lee Sangbeom) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.6
본 논문은 미디어 서비스 플랫폼에서 점차 중요성이 커지고 있는 추천 시스템에 대한 효과성을 분석하였다. 대표적으로 사용되는 추천 알고리즘 중 CBF 기반의 콘텐츠-콘텐츠 간 유사성 추천 방식을 적용하여 연구를 진행하였다. 이때 해당 추천 방식에 반영되는 사용자의 행동 유형 2가지(클릭, 재생)에 따른 추천 효과성을 살펴보았다. 추천 효과성은 3가지 요인(콘텐츠의 다양성, 콜드 스타트 문제 해결 효과성, 콘텐츠 재생 전환율)을 기준으로 분석한 결과, 클릭 기반의 추천 방식을 사용할 경우 재생 기반의 추천 대비 콘텐츠의 다양성이 증가하고, 콜드 스타트 문제 해결에 효과적이라는 것을 알 수 있었다. 반면 재생 전환율 개선에는 효과가 미미하여 클릭 기반의 추천에서의 재생 전환율 개선 방향에 대한 후속연구를 진행하고자 한다.
김호섭,김상용,박지형,한미덕,Kim, Ho-Sub,Kim, Sang-Yong,Park, Jihyung,Han, Mideok 한국물환경학회 2017 한국물환경학회지 Vol.33 No.5
The fractionation characteristics of organic matter were investigated in inflow and effluent of each other pollution sources and river. While the DOC/TOC ratio in the influent of public sewage treatment plant and livestock disposal facilities was above 0.58, the POC/TOC ratio of human livestock Night soil treatment plant and stormwater runoff was more than 0.7. The TOC removal efficiency of public sewage treatment plant and human livestock Night soil treatment plant were 88.5 % and 99.6 %, respectively. Although the concentration distribution of organic matter pollution most of total organic carbon (TOC) in effluent of pollution sources accounted for dissolved organic carbon (DOC) type (DOC/TOC ratio >0.89) and Refractory-DOC (RDOC)/TOC ratio was higher (>0.65). The fractionation characteristics of organic matter in river were similar with that of sewage treatment plant and TOC concentration showed the positive correlation with DOC ($r^2=0.93$) and RDOC ($r^2=0.89$) concentration. The decay rate of Labile DOC (LDOC) (avg. $0.128day^{-1}$) was higher than labile particulate organic carbon (LPOC) ($0.082day^{-1}$), while that of DOC ($0.008day^{-1}$) was lower than POC ($0.039day^{-1}$) (paired t-test, p < 0.001, n = 5). These study results suggested that it should consider important both TOC and DOC as the target indicator to control refractory organic matter in pollution sources.
유니버셜 디자인 원리를 활용한 고령자 지원 로봇 디자인
박은경(EunKyoung Park),오주영(Juyoung Oh),이준(Jun Lee),허용정(Yongjeong Huh),박지형(Jihyung Park) 한국HCI학회 2017 한국HCI학회 학술대회 Vol.2017 No.2
전 세계적으로 65 세 이상의 인구가 급격하게 늘어나는 고령화 시대에 접어들면서, 일상 생활을 영위하고자 하는 고령자의 니즈는 증가하고 있으나 고령자를 부양할 수 있는 경제 활동 인구와 간병노동력의 감소로 인해 여러 사회적인 문제가 야기되고 있다. 이러한 문제를 해결하기 위한 방법으로 고령자 지원 로봇이 중요하게 부각되고 있으며, 이와 더불어 고령자의 니즈를 만족시킬 수 있는 로봇 디자인 또한 중요한 이슈가 되고 있다. 본 연구에서는 고령자의 특성을 바탕으로 고령자지원 로봇에 대한 니즈를 파악한 후, 유니버셜 디자인 원리를 활용하여 이를 충족시킬 수 있는 디자인 방법을 제안하였다. 그리고 해당 디자인 방법을 바탕으로 6 가지 로봇 디자인안을 고안한 후, 고령자를 대상으로 사용자 평가를 수행하여 최종 로봇 디자인안을 선정하였다.
낙동강수계 3단계 광역시,도 경계지점 목표수질 설정을 위한 관리권역 및 관리목표 설정 방법 연구
황하선 ( Hasun Hwang ),박지형 ( Jihyung Park ),김용석 ( Yongseok Kim ),류덕희 ( Doughee Rhew ),최유진 ( Yujin Choi ),이성준 ( Sungjun Lee ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.5
The current Total Pollution Load Control (TPLC) sets the Target Water Quality (TWQ) by utilizing the delivery ratio, unit loads, and water quality modeling, it also allocates the watershed’s permitted discharge load. Currently, common target pollutants of every unit watershed in TPLC are BOD and T-P. This study has reviewed the 1th and 2th of TWQ setting process for the Nakdong River 3th TWQ setting in Total Pollution Load Control (TPLC). As a result of review, 1th and 2th were divided into one management basin (mulgeum) for setting management goals. However, 3th was divided into six management basins (mulgeum, gnagjeong, geumho river, nam river, miryang river, end of nakdong river). The principle of management goal setting were to achieve the objective criteria of Medium Areas for the linkage of the water environment management policy. And Anti-Degredation (principle of preventing deterioration) were applied to the 3th TWQ. Also, additional indicators were considered in accordance with the reduction scenarios for the final management goals.
최세빈(Sebin Choi),박지형(Jihyung Park),이한구(Hangu Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper presents design evaluation through the statics analysis of coupler of vehicle deceleration device. Coupler of vehicle deceleration device is designed coupler upper and coupler bottom,sleeve. Catia program was used to design of coupler. Ansys program was used to statics analysis of coulper. The material of coupler was made of Steel (S45C) series, and the material of the sleeve was made of Hytrel 6356. Each constraint has focused on the structure of the vehicle deceleration device. The current research will be a very useful tool in the near future for the static analysis for the Coupler.
자동화 수동 변속기(AMT)의 공압식 클러치 액추에이터의 설계 검증
최세빈(Sebin Choi),박지형(jihyung Park),최수길(Sugil Choi),이한구(Hangu Lee) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
In this paper, presents design evaluation of Pneumatic Clutch Actuator of vehicle. Pneumatic Clutch Actuator of vehicle is designed in cylinder and spring, piston. Catia program was used to design of Clutch Actuator. Ansys program was used to statics analysis of Clutch Actuator. RecurDyn program was used to dynamic analysis of Clutch Actuator. Through this study, we were obtained optimum Pneumatic Clutch Actuator specifications. The current research will be a very useful tool in the near future for the Design Evaluation for the Pneumatic Clutch Actuator.