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스트릿 댄스 지도자 리더십에 따른 전공학생의 흥미와 몰입 간의 관계
최용원(Choi, Yong-Won),황성우(Hwang, Sung-Woo) 한국사회체육학회 2017 한국사회체육학회지 Vol.0 No.68
This research intends to provide the basic data for the street dance major students’ efficient and positive use of their practice time that is on increase. For this purpose, we examined the street dance major students’ leadership and interest and also studied their influence on the street dance major students’ being immersed in dancing. The subject of this study were street dance major students. Convenience sampling, which is a nonprobability sampling, was used. Among a total of 400 questionnaires distributed, 380 copies were collected back. And the questionnaires that were insincerely replied, double-replied or judged useless for the study were excluded and a total of 360 questionnaires were analyzed. The research results are as follows: First, the results of examining the influence of the leadership on the interest were partly influenced. Second, the results of examining the influence of the leadership on being immersed in dancing were partly influenced. Third, the results of examining the influence of the interest on being immersed in dancing were partly influenced.
클라우드 환경의 마이크로서비스와 모놀리식 아키텍처의 성능 비교 및 분석
최용원(Yong-Won Choi),이연빈(Yeon-Bin Lee),이원주(Won-Ju Lee),주시은(Si-Eun Joo),이도경(Do-Kyung Lee),이지현(Ji-Hyun Lee),박세진(Se-Jin Park) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6
This paper presents a comparative analysis of monolithic architecture and microservice architecture in cloud environment. The introduction provides a background on the growing popularity of microservices. The main body of the paper introduces the concepts of monolithic and microservice architectures, and discusses the internal communication speed limits of microservices. In addition, two approaches for overcoming these limits, namely the internal load balancer and Service Mesh, are also presented. The performance comparison and analysis section compares the communication speed between clients in both monolithic and microservice architectures. Furthermore, the paper presents a resilience test in which a single service is terminated and the system’s ability to recover is evaluated. Lastly, the communication speed between the internal load balancer and Service Mesh approaches for microservice communication is compared. Overall, this paper provides insights into the benefits and limitations of both monolithic and microservice architectures in a cloud environment. The findings can help software architects and developers in selecting the appropriate architeture for their cloud-based applications.
안정화 원소 Ti 첨가에 따른 스테인리스강의 해수 내 캐비테이션-침식 특성
최용원(Yong-Won Choi),양예진(Ye-Jin Yang),김성종(Seong-Jong Kim) 한국표면공학회 2016 한국표면공학회지 Vol.49 No.4
Stainless steel is widely applied in many industrial fields due to its excellent anti-corrosion and durability characteristics. However, stainless steel is very vulnerable to cavitation attack caused by high speed flow of fluid in the chloride environments such as marine environment. These conditions promote intergranular corrosion and cavitation-erosion, leading to degradation of the structural integrity and service life. In order to prevent these problems, the stabilized stainless steel is applied to the offshore and shipbuilding industries. In this study, Ti was added to 19%Cr-9%Ni as the stabilizer element with different concentrations (0.26%, 0.71%), and their durabilities were evaluated with cavitation-erosion experiment by a modified ASTM G32 method. The microstructural change was observed with the stabilizer element contents. The result of the observation indicated that the amount of carbide precipitation was decreased and its size became finer with increasing Ti content. In the cavitation-erosion experiment, both weight loss and surface damage depth represented an inverse proportional relationship with the amount of Ti element. Consequently, the stainless steel containing 0.71% of Ti had excellent durability characteristics.
해수 내 캐비테이션-침식 저항성에 미치는 스테인리스강의 Nb 첨가의 영향
최용원(Yong-Won Choi),한민수(Min-Su Han),김성종(Seong-Jong Kim) 한국표면공학회 2016 한국표면공학회지 Vol.49 No.3
Stainless steel is widely used in various industries due to its excellent anti-corrosion characteristics. However, if the stainless steel is exposed to high speed fluid flow and chloride ion in the marine environment, corrosion and cavitation damage occurred on the surface easily. Therefore, to prevent these problems, stabilzed stainless steel is applied to offshore and shipbuilding industries. In this study, stabilized stainless steel specimen was made by 19%Cr-9%Ni with different Nb contents (0.29%, 0.46% and 0.71%). And then, their cavitation characteristics were investigated. As a result, the characteristics of cavitation resistance of stainless steel could be improved by increasing Nb contents.
윤지원(Yoon Ji won),정성필(Jung Sung phil),전용호(Jun yong ho),박태원(Park Tae won),최용원(Choi Yong won),황재철(Hwang Jae chul),서종휘(Seo Jong hwi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
Nowadays, the cable harness is widely used in the robot industry because of its wide usability and ease installment and management. The cable used in the industrial robot is important because it transfers the signal and power, even liquid such as lubricating oil. Therefore, reliability of the cable is the critical issue in the robot design process. Since the cable is very flexible compared to other components in the system, the motion of the cable is difficult to estimate mathematically. Recently, solving a large deformation problem using the Absolute Nodal Coordinate Formula(ANCF) becomes the hot issue in the multibody dynamics society. This work introduces that a cable is modeled as a very flexible component using the ANCF and combined with a robot modeled as a rigid body system. From this mixed system, the strain of the cable can be calculated. The dynamic strain obtained from this model is used to estimate the fatigue life of the cable with S-N curve from the test.
장기간 지팡이의 사용이 뇌졸중 환자의 건측 상지 기능에 미치는 영향
손성민,최용원,김중선,Son, Sung-Min,Choi, Yong-Won,Kim, Chung-Sun 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.2
Purpose: The purpose of this study was to investigate the adverse effects of sensorimotor function at the shoulder joint according to long-term cane usage in stroke patients without apraxic behavior, in terms of the presence of shoulder joint pain, accuracy of tracking task, proprioceptive joint position sense, and nine-hole pegboard. Methods: Nineteen stroke patients with long-term cane usage (cane usage group) and nineteen stroke patients without cane usage (non-cane usage group) were recruited. All subjects were tested in pain presence, a tracking task for visuomotor function, joint reposition, and nine-hole pegboard in the shoulder joint regarding the non-affected side. Results: In the accuracy index for tracking task and the nine-hole pegboard test, significant differences were observed between the cane usage group and the non-cane usage group. However, although a higher emergence of shoulder pain and a lower accuracy for joint reposition sense were detected in the cane usage group in comparison to the non-cane usage group, there were no significant differences between the two groups. Conclusion: Our findings suggest that long-term cane usage could induce to decrease in delicate movement and coordination in the non-affected upper arm in stroke patients. In addition, they could experience high frequency of shoulder pain and poor joint reposition sense. Therefore, careful evaluation and observation will be required concerning stroke patients with long-term cane usage.