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Study of the Switching Errors in an RSFQ Switch by Using a Computerized Test Setup
김세훈,백승헌,양정국,김준호,강준희,Kim, Se-Hoon,Baek, Seung-Hun,Yang, Jung-Kuk,Kim, Jun-Ho,Kang, Joon-Hee The Korean Superconductivity Society 2005 Progress in superconductivity Vol.7 No.1
The problem of fluctuation-induced digital errors in a rapid single flux quantum (RSFQ) circuit has been a very important issue. In this work, we calculated the bit error rate of an RSFQ switch used in superconductive arithmetic logic unit (ALU). RSFQ switch should have a very low error rate in the optimal bias. Theoretical estimates of the RSFQ error rate are on the order of $10^{-50}$ per bit operation. In this experiment, we prepared two identical circuits placed in parallel. Each circuit was composed of 10 Josephson transmission lines (JTLs) connected in series with an RSFQ switch placed in the middle of the 10 JTLs. We used a splitter to feed the same input signal to both circuits. The outputs of the two circuits were compared with an RSFQ exclusive OR (XOR) to measure the bit error rate of the RSFQ switch. By using a computerized bit-error-rate test setup, we measured the bit error rate of $2.18{\times}10^{-12}$ when the bias to the RSFQ switch was 0.398 mA that was quite off from the optimum bias of 0.6 mA.
헬스클럽의 서비스품질과 서비스공정성이 고객애호도에 미치는 영향
송채훈(Chae Hun Song),주명일(Myung Ll Ju),백승헌(Seung Heon Baek) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.45
The study is significant in examining service quality required by customers which can enhance customer loyalty and correct service justice process factors between the management and customers in fitness centers and providing empirical materials which can gain management efficiency and competition superiority of fitness centers which are placed on competitive environment through acquisition and utilization of a variety of materials. The subjects of this study were fitness club customers residing in G metropolitan city in 2009. The self-administered questionnaire survey was conducted with a total of 500 customers and 50 copies were distributed to 10 fitness clubs in 5 districts(two in each district). 464 effective samples were analyzed and finally the following conclusion was drawn. First, as a result of analyzing the effects of service quality on customer loyalty in fitness centers, as reliability, responsiveness, assurance, and empathy became higher, behavior loyalty was increased; as tangibility, assurance, and empathy became higher, attitude loyalty was increased; and as tangibility and assurance became higher, perception loyalty was increased. Second, as a result of analyzing the effects of service justice on customer loyalty in fitness centers, as distributive justice, interactional justice, and procedural justice became higher, behavior loyalty was increased; as distributive justice and interactional justice became higher, attitude loyalty was increased; and as distributive justice, interactional justice, and procedural justice became higher, perception loyalty was increased.
배드민턴 동호인의 운동몰입이 사회적응과 운동중독에 미치는 영향
송채훈(Chae Hun Song),최태광(Tae Kwang Choi),백승헌(Seung Heon Baek) 한국사회체육학회 2011 한국사회체육학회지 Vol.0 No.44
The purpose of this study is to examine the relationship between flow experience and exercise addiction that can induce exercise adherence and the relationship between flow experience and social adjustment that is well-matched with social environment. Furthermore this study aims at providing materials to enjoy stable life in social adjustment under the influence of more positive exercise addiction in demonstrating the effectiveness of badminton as sports for all and participating in badminton and in-depth materials to activate badminton. In order to achieve this purpose, a questionnaire survey was conducted with 400 badminton club members residing in five districts in G metropolitan city in 2009 using a self-administration method which is one of personal interview methods. 52 questionnaires were excluded because of poor responses or missing contents and a total of 348 responses were analyzed using SPSS 15.0. Finally the following results were obtained. First, for the effects of exercise flow on social adjustment in badminton club members, high cognitive and behavioral flow had high effects on work, leisure/social, and home adjustment which were sub-factors of social adjustment. Second, for the effects of exercise flow on exercise addiction in badminton club members, high cognitive and behavioral flow had high effects on withdrawal symptoms, exercise needs, emotional attachment which were sub-factors of exercise addiction.