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선별이적처리를 통한 사용종료 비위생매립지 정비방안 연구
김동오(Kim Dongoh),김태경(Kim Taekyoung),김미화(Kim Mihwa),김문일(Kim Moonil) 한국지반환경공학회 2009 한국지반환경공학회논문집 Vol.10 No.1
본 연구의 목적은 사용종료 비위생매립지의 안정화 정도를 평가하고 안정화되지 않은 사용종료 매립지의 재정비 방안을 도출하는데 있다. 안정화 정도는 기존 사용종료 비위생매립지 21개소의 매립폐기물 시료를 채취하여 그 성상을 분석하여 평가하였다. 물리적 성상으로는 토사, 유기물, 가연성 및 불연성으로 분석하였다. 그 결과 매립폐기물 시료를 채취한 9개소의 비위생매립지는 사용종료 후 10년 이상 경과되었음에도 완전한 안정화가 이루어지지 않았으며, 사용종료 비위생매립지의 재정비가 시급함을 알 수 있었다. 비위생매립지의 물리적 성상중 토사 함량이 높았으며 가장 높은 함량은 89.96%이었다. 이와는 달리 위생매립지의 경우는 9.89~11.12%로 토사함량이 낮았다. 따라서 선별이적처리에 의해 회수된 토사는 재정비를 해야하는 비위생매립지의 복토재나 건설재료로의 재활용할 수 있을 것으로 평가되었다. The aim of this study was an evaluation of closed non-sanitary landfill's stabilization degree and a determination of its an optimal reclamation method. In order to evaluate the stabilization degree, physical compositions of landfill wastes in 21 closed non-sanitary landfills were analyzed. There were 4 major items such as cover soils, organics, combustibles and incombustibles. With respect to the results of physical compositions, it was determined that the waste in 9 sampling sites of closed non-sanitary landfills after 10years of the relief time was not fully stabilized. The closed non-sanitary landfills must be reclaimed as soon as possible. The main material in closed non-sanitary landfills was cover soils and the highest content was 89.96%. Otherwise, the contents in sanitary landfills was small and 9.89~11.12%. Therefore, it was evaluated that the recovered soil by sorting transfer treatment could be reused as on-site cover soils of the reclamating non-sanitary landfills and/or constructing materials.
Comparison of seven fall risk assessment tools in community-dwelling Korean older women
Kim, Taekyoung,Xiong, Shuping Informa UK (TaylorFrancis) 2017 Ergonomics Vol.60 No.3
<P>Practitioner Summary: There is no general guideline on which fall risk assessment tools are suitable for community-dwelling Korean older women. This study compared seven widely used assessment tools in terms of validity and practicality. Results suggested that the short Falls Efficacy Scale is the most suitable tool, followed by Berg Balance Scale.</P>
Simulation and experimental analysis of abrasive fluidized bed machining process
Taekyoung Kim,이현섭 대한기계학회 2020 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.34 No.5
Fluidized bed machining (FBM) was developed for use in polishing, deburring, edge contouring, and other areas for parts with complex geometry. Recently, FMB was studied to determine the final surface roughness of machined 3-dimensional parts. The researchers have been studying the system configuration and FBM process parameters, but most research has focused on experimental approaches and applications of FBM. In this study, experimental studies on the process parameters and computational fluid dynamics (CFD) simulations of FBM on a stainless steel 304 (SS304) substrate were performed. Alumina particles were used in FBM experiments. CFD simulations were used to examine the particle velocity in the chamber and the shear stress acting on the SS304 substrate due to changes in the main shaft rotation speed and air pressure during the FBM process. The experimental results show that the material removal rate (MRR) increases as the rotation speed of the specimen increases, and MRR is greatest when the air pressure reaches 0.04 MPa. CFD analysis may be helpful for designing FBM equipment and optimizing FBM process.
TaeKyoung Kim,GyuRi Heo,TaeKyun Kim 한국서비스디자인학회 2019 서비스디자인융합연구 Vol.3 No.2
본 연구는 UX 서비스 디자인 방법론을 통해 현재 늘어나고 있는 무인점포 매장의 문제점을 인지하고 해결하고자 하는 전반적 프로세스다. 임금상승으로 인해 무인으로 대체하는 산업이 활성화 되고 있다. 여기에 IT기술의 발달과 언택트를 선호하는 사회적 분위기가 맞물려 전국적으로 무인점포 매장이 빠르게 확산되고 있다. 무인점포의 대표적인 제품 중 키오스크를 선정하여 문제점을 분석했다. 발견된 문제점으로는 매장마다 다른 인터페이스로 인한 혼란과 익숙하지 않은 사용자층의 존재다. 리서치 방법론을 이용한 자료조사 과정에서 발견된 단서를 통해 사용자의 요구를 파악하고 분석하여 UX 디자인 방향과 Insight를 도출하였다. 이를 토대로 개선된 서비스디자인을 위하여 비콘기술을 사용한 IoT 제품과 어플리케이션을 개발했다. 첫 번째로, 비콘기술을 이용하여 신속한 에플리케이션 접근을 가능하게 했다. 두 번째로, 음성인식 인터페이스 사용으로 기존 키오스크가 부재했던 즉각적인 피드백 제공한다. 마지막으로 사용자의 구매 데이터베이스를 축적하여 다음 사용 시 빠르게 접근한다. This paper is an overall process that recognizes and tries to solve problems of unmanned stores that are currently increasing through UX service design the methodologies. Wage increases are boosting industries that are replacing people. the development of technology and who prefer ‘untact’ social atmosphere, shows fast spreading unmanned stores across the country. We selected kiosks from representative products in unmanned stores and analyzed problems. Discovered problems are confusion caused by different interfaces at each store and the presence of unfamiliar users. The UX design direction and insight has been extracted by understanding and analyzing the needs of the user in the research process through methodology. Based on this, IoT products and applications using beacons were developed for improved service design. First, we enabled rapid application access using beacon technology. Second, the use of conversation UI provides immediate feedback that the existing kiosks were absent. Finally, it accumulates the user s purchasing database and provides quick access for the next use.