스텐실 개구홀 크기 변화에 따른 솔더프린팅 인쇄효율 평가

권상현,김정한,이창우,유세훈,Kwon, Sang-Hyun,Kim, Jeong-Han,Lee, Chang-Woo,Yoo, Se-Hoon 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.4

표면실장형 수동소자인 0402, 0603, 1005 칩에 대한 인쇄 주요인자 결정 및 공정 최적화를 실험계획법을 통해 실시하였다. 실험에 사용된 솔더는 Sn-3.0Ag-0.5Cu와 Sn-0.7Cu이며, 공정변수로는 스텐실 두께, 스퀴지 각도, 인쇄 속도, 기판분리 속도, 스텐실과 기판간의 갭이며, 인쇄압력은 2 $kgf/cm^2$로 고정하였다. 분산분석을 통해 인쇄효율에 영향을 미치는 주요인자가 스텐실 두께와 스퀴지 각도임을 확인할 수 있었다. 주요인자인 스텐실 두께와 스퀴지 각도를 변화시켜 인쇄효율의 최적화 영역을 확인하였고, 0402, 0603, 1005 칩 모두 스퀴지 각도가 $45^{\circ}$ 이하일 경우 인쇄효율이 높았다. 스텐실 두께를 변화할 경우 칩 크기에 따라 인쇄효율이 다른 양상을 보였는데, 0402, 0603 칩에서는 스텐실 두께가 얇을수록 높은 인쇄효율을 보였으며, 1005 칩에서는 스텐실 두께가 두꺼울수록 높은 인쇄효율을 나타내었다. Main parameters of the screen printing were determined and the printing parameters were optimized for 0402, 0603, and 1005 chips in this study. The solder pastes used in this study were Sn-3.0Ag-0.5Cu and Sn-0.7Cu. The process parameters were stencil thickness, squeegee angle, printing speed, stencil separating speed and gap between stencil and PCB. The printing pressure was fixed at 2 $kgf/cm^2$. From ANOVA results, the stencil thickness and the squeegee angle were determined to be main parameters for the printing efficiency. The printing efficiency was optimized with varying two main parameters, the stencil thickness and the squeegee angle. The printing efficiency increased as the squeegee angle was lowered under 45o for all chips. For the 0402 and the 0603 chips, the printing efficiency increased as the stencil thickness decreased. On the other hand, for the 1005 chip, the printing efficiency increased as the stencil thickness increased.

남성 실업 핸드볼 팀의 팀 빌딩 중재 사례연구

권상현(Kwon, Sang-Hyun) 한국코칭능력개발원 2022 코칭능력개발지 Vol.24 No.1

소류지 퇴적토의 용출특성 실험

권상현 ( Sang-hyun Kwon ),김세민 ( Se-min Kim ),곽규동 ( Gyu-dong Gwak ),이철효 ( Cheol-hyo Lee ),박영기 ( Young-ki Park ) 한국환경기술학회 2016 한국환경기술학회지 Vol.17 No.5

본 연구는 가축분뇨 유입으로 오염된 소류지 주변 및 하부 퇴적물이 주변 수계에 미치는 영향을 파악하고자 용출시험을 수행하였다. 강제 용출시험을 통하여 퇴적물내 유기오염물질 및 중금속의 최대 용출가능성을 평가하였고, 연속 용출시험으로는 퇴적물내 유기오염물질의 용출특성을 관찰하였다. 강제 용출시험 결과 T-N은 11.4~144.8 ㎎/L, T-P 1.6~290.6 ㎎/L, As 0.01~0.04 ㎎/L, Zn 0.17~2.67 ㎎/L로 호소 및 하천수질기준을 상회하는 범위를 보였다. 연속 용출시험 결과 용출되는 유기오염물질의 농도는 점차 감소하여 모든 시료에서 반응 15시간 이후부터는 어느 정도 안정된 값을 보일 것으로 보이며, 반응용액 내 농도만을 고려해 볼 때, T-N은 2.2~19.4(평균 7.7) ㎎/L, T-P 0.5~51.4(평균 18.1) ㎎/L로 하천수 및 호소수질기준보다도 현저히 높은 값이다. 중금속 항목의 경우 유기오염물질과 같이 반응시간이 경과함에 따라 용출되는 농도가 감소하였다. 3개 소류지의 주변지역 수계로의 오염물질 확산 및 이동을 차단하기 위해서는 오염원을 제거 또는 처리(정화)하거나 확산방지조치를 취하는 것이 필요할 것으로 사료된다. In this study, we have performed a dissolution test for which we want to research the possibilities of impact on the surrounding water by reservoir near and bottom sediments contaminated with animal feces and urine flow. Forced dissolution test was assessed the maximum elution potential of organic pollutants and heavy metals in the sediments. In continuous dissolution test, we were observing the elution characteristics of the organic contaminants in the sediment. Result of forced dissolution tests shows T-N 11.4∼144.8 ㎎/L, T-P 1.6∼290.6 ㎎/L, As 0.01∼0.04 ㎎/L, Zn 0.17∼2.67 ㎎/L that is the range above appeal and river water quality criteria. Concentration of organic and heavy metal contaminants to be continuous dissolution test results elution gradually decreased after 15 hours. Since the target reservoir is a high concentration of organic substances are deposited, if we remove the upper source of contamination, it is possible that contaminants are eluted during quite a long time.

밀도기반 군집화와 딥러닝을 활용한 공정 주기 신호의 이상 탐지 및 분류

권상현(Sang-Hyun Kwon),안민정(Min-Jeong An),이홍철(Hong-Chul Lee) 대한산업공학회 2018 대한산업공학회지 Vol.44 No.6

신입생 학생선수를 위한 대학 생활 적응프로그램 개발

권상현 ( Sang-hyun Kwon ) 한국스포츠정책과학원 2021 체육과학연구 Vol.32 No.2

〔목적〕 본 연구의 목적은 신입생 학생선수가 대학 생활에 효과적으로 적응하도록 돕는 프로그램을 개발하고 신입생 학생선수를 위한 프로그램의 기초자료를 제공하는 것이다. 〔방법〕 본 연구의 목적을 달성하기 위하여 학생선수 160명과 전문가집단 5명이 참여하였다. 대학 생활 적응프로그램 개발을 위해 개방형 설문 및 심층면담을 통한 요구분석, 예비 프로그램 구성, 예비검사를 진행하였다. 〔결과〕 첫째, 요구분석에서 7개의 필요 요인과 4개의 방해요인이 나타났다. 이와 더불어 학생선수들의 경험을 바탕으로 한 3개의 지원요인과 7개의 방해요인이 나타났다. 요구분석 결과를 바탕으로 전문가집단 회의를 진행하여 총 4단계, 12회기로 구성된 예비 프로그램을 구성하였다. 이후 9명의 신입생 학생선수와 2명의 전문가가 두 달 동안 예비 프로그램에 참여하였다. 예비 프로그램이 종료된 후 평가를 진행하였으며, 평가 결과를 바탕으로 프로그램을 수정·보완하였다. 그 결과, 최종적으로 총 4단계, 13회기의 신입생 학생선수 대학 생활 적응프로그램이 개발되었다. 〔결론〕 본 연구에서 개발된 프로그램은 신입생 학생선수가 자신의 역할과 책임에 대하여 올바르게 인식하고 긍정적인 대인관계 형성 및 자아존중감 향상을 기대해 볼 수 있다. 그러므로 대학교 관계자 및 지도자 그리고 스포츠심리상담사는 신입생 학생선수들의 성공적인 대학 생활을 위해 본 프로그램을 현장에 적극적으로 제공할 필요가 있다. [Purpose] The purpose of this study was to develop an effective college life adaptation program for freshman student-athletes. [Methods] A total of 160 student-athletes and 5 experts agreed to participate in this study. Four procedures were followed in this study: the needs assessment, the preliminary program development, and the application of the program. For the needs assessment, in-depth interviews were conducted, and the data were analyzed using an inductive reasoning process. [Results] The results of the needs investigation showed seven need factors and four interruption factors for college life adaptation. In addition, three need factors based on experience and seven interruption factors based on experience were found. The preliminary program was developed based on the needs assessment through the expert meeting, and the program consisted of four stages. Each stage consisted of three sessions, and each session contained a specific topic. The program was provided to nine freshman student-athletes in two months. As a result, the final program which consisted of four stages and thirteen sessions was developed after the reinforcement process based on evaluation of the preliminary program was conducted. [Conclusions] It is concluded that, the program is able to be expected to help them to understand their roles, have a better sense of responsibility and improve their self-esteem. Therefore, coaches and mental performance consultants should provide the college life adaptation program for freshman student-athletes to reduce their stress and have a better college life.

무용전공 학생의 신체적 자기효능감이 자결성동기와 무용정서표현성에 미치는 영향

박성현(Park, Sung-Hyun),권상현(Kwon, Sang-Hyun),홍석범(Hong, Seog-Beom),육동원(Yook, Dong-Won) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.6

The purpose of this study is to identify the effects of dance major student’s physical self-efficacy on their self-determination motivation and dance emotional expressiveness. A total of 467 dance major students agreed to participate in this study. Four types of questionnaires were utilized: physical self-efficacy questionnaire, self-determination motivation questionnaire, and dance emotional expressiveness test. The data were analyzed using the frequency analysis, the correlation analysis, and the multiple regression analysis. The results are as follows: first, the level of physical self-efficacy positively and negatively affect the level of self-determination motivation. Second, the level of physical self-efficacy positively affects the level of dance emotional expressiveness. Lastly, the level of self-determination motivation positively and negatively affects the level of dance emotional expressiveness. The findings of this study suggest that dance field needs to offer systematic useful program which student effectively increase their level of physical self-efficacy. In addition, it is essential to create new types of education method in dance field so that they can reinforce their level of intrinsic motivation.

생산기반기술 디지털화를 위한 지식공유형 플랫폼 개발: 전자패키지 표면실장기술을 중심으로

배성민,손수현,권상현,이효수,허영무,강문진,유세훈,Bae, Sung-Min,Son, Soo-Hyun,Kwon, Sang-Hyun,Lee, Hyo-Soo,Heo, Young-Moo,Kang, Mun-Jin,Yoo, Se-Hoon 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.1

In this paper, we introduce knowledge sharing platform for production technology. Surface mount technology (SMT) is one of the important production technologies to fabricate electronic devices. The production technology of the SMT, however, has been propagated from an experienced worker to an inexperienced worker in a manufacturing field. The objective of the knowledge sharing platform is to convert the production experiences like a solder printing knowhow into quantitative values, to construct the database of the process technologies, and to share the technologies systematically via web portal service. In addition, the knowledge sharing platform contains the total production process of mobile products, the information of experts and facilities, and recent R&D output. In this manner, the knowledge sharing platform for production technology could strengthen the technological competitiveness of small and medium manufacturing companies in Korea.

아이스하키 동호인의 스포츠재미와 일상 스트레스 및 삶의 질의 구조적 관계

오대호(Oh, Dea-Ho),권상현(Kwon, Sang-Hyun),육동원(Yook, Dong-Won) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.4

The purpose of this study was to investigate the structural relationship between sports enjoyment, daily stress, and quality of life, and to verify mediation effect of daily stress in the path from sports enjoyment to quality of life. Ice hockey club members(N=309) participated in the study. The data was collected from sports enjoyment, daily stress, and quality of life questionnaires after their verification of validity and reliability were conducted. The frequency analysis, the exploratory factor analysis, the confirmatory factor analysis, reliability analysis, the correlation analysis, and the structural equation analysis were conducted for achieving purpose of the study. The results are as follows: first, sports enjoyment negatively affects daily stress(p<.001), and daily stress negatively affects quality of life (p<.001). Additionally, sports enjoyment positively affects quality of life(p<.05). Second, the mediation effect of daily stress was revealed in the path from sports enjoyment to quality of life(p<.001). In conclusion, the relationship between sports enjoyment, daily stress, and quality of life was discovered through this study. In addition, the mediation effect of daily stress was also verified in the path from sports enjoyment to quality of life. This study would help efficiently improve and maintain level of ice hockey club members" quality of life.

아이스하키 선수의 의사소통이 불안과 공격성에 미치는 영향

김건우(Kim, Geon-Woo),권상현(Kwon, Sang-Hyun),육동원(Yook, Dong-Won) 한국체육과학회 2019 한국체육과학회지 Vol.28 No.6

This study was designed to investigate the effects of ice hockey players’ communication on their anxiety and aggression. This study would positively affect the reinforcement of their team performance. Ice hockey players (N=250) participated in the present study. The data was collected from the Korean version of SECTS-2, the CSAI-2, and the Korean version of aggression questionnaires after their verification of validity and reliability were conducted. The frequency analysis, the correlation analysis, and the multiple regression analysis were properly conducted according to their purpose of analysis. The results are as follows: first, the level of communication significantly affected the level of anxiety. Specifically, the negative conflict factor positively affected all of the factors of anxiety. Second, the level of communication significantly affected the level of aggression. Particularly, the negative conflict factor positively affected all of the factors of aggression. However, the positive conflict factor did not affect any factors of aggression. Lastly, the level of anxiety significantly affected the level of aggression. The somatic and cognitive anxiety factors both partially and positively affected the factors of aggression. Moreover, the self-confidence factor negatively affected only the anger factor. In conclusion, most people may believe that activating positive conflict would be effective to manage athletes’ level of anxiety and level of aggression. However, it was determined that to trying to avoid negative conflict is more important than activating positive conflict in ice hockey teams through the current study. Therefore, coaches and sports psychologists should educate ice hockey players as to what negative conflict is and how to deal with negative conflict between teammates.

대학 운동선수들의 은어와 스포츠 팀 문화에 내포된 심리요인 탐색의 문화기술지

최재섭(Choi, Jae-Sub),권상현(Kwon, Sang-Hyun) 한국웰니스학회 2018 한국웰니스학회지 Vol.13 No.3

본 연구의 목적은 대학운동선수들만이 사용하는 은어의 탐색을 통해 현장에서의 심리 상담과 의사소통을 위한 대학 팀 문화의 이해를 달성하는 것이다. 이를 통해 그 안에 함의를 찾아내고 문화 속 생성되고 투영 될 수 있는 심리적 요인들을 탐색함으로써 교육자들과 연구자들에게 기초자료를 제공하고자 하였다. 본 연구의 목적을 달성하기 위해 질적 연구의 한 방법인 문화기술지를 사용하였다. 자료수집의 주요한 방법은 개방형설문지, 비참여관찰, 심층면접이다. 자료 수집을 위해 개방형 질문지를 통해 대학운동선수들의 은어와 그들만의 문화를 재조명하고 주요 정보 제공자(key informants)를 발굴한 후 추가적인 심층면담을 통해 정보를 수집하였다. 은어사용의 맥락에 따라 ‘지도자 관련 은어, 선수 간 수행관련 은어, 선수 간 생활관련 은어’ 3가지 범주가 도출되었다. 각 상위범주는 은어사용 이유와 목적에 따라 지도자 관련 은어는 ‘경계와 은폐, 비하와 조롱, 반항’ 3가지 하위범주가 도출되었고 선수 수행관련 은어는 ‘비하와 조롱, 칭찬, 풍자와 재미’ 3가지 하위범주가 탐색 되었다. 마지막으로 선수 간 생활관련 은어는 ‘선수 내 집단구분, 선수 간 내부결속, 비밀유지’로 구분되었다. 운동선수들의 은어가 스포츠 팀 문화와 심리적 요인과의 연계가능성과 의사소통 및 상호작용 등과 연계 될 수 있는 방안에 대해 논의하였다. The purpose of this study was to understand sport team culture through athletes’ slang for psychological consultant and team communication by using a qualitative approach. It was hoped to obtain not only meanings of slang but to discover an undertone that reflects their team culture and psychological factors. An open-ended questionnaire, in-depth interviews and observation were conducted to collect data. From a perspective of an ethnography account, the article described the meaning and a cultural undertone of their slang. As a result, college student-athletes often use slang or their own language in the three main domains. First, they use slang towards coaches for wariness and concealment, belittlement and mockery, and defiance. Second, they use performance or training related slang with their peers for belittlement and mockery, compliment, and satire and fun. Third, they use it with their peers regardless of performance but other athletic domains off the pitch to devide groups within a team, for integral unity among team members, and to hide and share their secrets. The implication of the study for sport psychology consultants and researchers are discussed for a better understanding of sport team culture and participants and application of intervention programs.