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박종선,Park, Jong-Sun 한국시스템엔지니어링학회 2011 시스템엔지니어링학술지 Vol.7 No.1
Configuration management plays a key role in systems engineering process for any project from earlier stage of development. It consists of five major activities, ie., configuration management planing, configuration identification, configuration control, configuration status accounting and configuration verification and audit, and is essential to control system design, development and operation throughout entire life cycle of the system development. And it is directly associated with other part of systems engineering management process, ie., technical data management which provides traceability of important decisions and changes during development. In this paper, we describe how to apply CASE(Computer-aided Systems Engineering) tool-Cradle for the configuration management to achieve effectiveness of Technical Management process.
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박종선,Park Jong-Sun 한국국방경영분석학회 1976 한국국방경영분석학회지 Vol.2 No.1
The purpose of this thesis is to study the optimal arrangement of aircraft instrument panels through the human factors approach. Human factors engineering is the process of effectively fitting the human component to the machine component in any man-machine system. The human factors. are especially important to an aircraft pilot who must constantly shift his attention between the instrument panel within the cockpit and the surrounding area of the aircraft. The preliminary part of this study is to find the general patterns of the Korean pilot's eye movements during their various flying maneuvers, and which instruments require the most attention while in flight. It is assumed that all pilots have a general pattern of eye movement when observing the aircraft instrument panel and that an optimum arrangement would be to minimize the eye travel distance between instruments. In this thesis the arrangements of instruments is taken to be the independent variable and the eye travel distance between instruments the dependent variable. la order to compile the information necessary for this study, sixty Korean Air Force pilots were interviewed and requested to complete information forms. These information forms listed various flying maneuvers and listed each instrument used on the instrument panel. The compilation of the information on these completed forms listed the instruments most frequently used by the pilots. The second part of this study was to determine the optimum instrument arrangement. It was necessary to study the various number of possible arrangements of instruments depending upon the number of instruments involved. Therefore, these instruments are grouped by two major functions, The flight instruments were subdivided into three groups, and the engineering instruments were subdivided into six groups. With this subdivision we arrive at the possible number of arrangements of 4,320. Through the simulation method, total eye travel distance for each of these 4,320 arrangements is calculated and the arrangement which appears to be of optimum distance between the most frequently used aircraft instruments is determined. The results of this study indicate that the optimum distance between instruments would be 33,028cm and that the corresponding distance of the instrument panel now being used is 34,288cm. Therefore, an increased efficiency of $3.8\%$ would be realized if the existing aircraft instrument panel were re-arranged according to layout proposed in this thesis.
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Statistical study on nightside geosynchronous magnetic field responses to interplanetary shocks
박종선,김관혁,이동훈,이은상,진호,Park, Jong-Sun,Kim, Khan-Hyuk,Araki, Tohru,Lee, Dong-Hun,Lee, Ensang,Jin, Ho 한국천문학회 2012 天文學會報 Vol.37 No.2
When an interplanetary (IP) shock passes over the Earth's magnetosphere, the geosynchronous magnetic field strength near the noon is always enhanced, while the geosynchronous magnetic field near the midnight decreases or increases. In order to understand what determines the positive or negative magnetic field response at nightside geosynchronous orbit to sudden increases in the solar wind dynamic pressure, we have examined 120 IP shock-associated sudden commencements (SC) using magnetic field data from the GOES spacecraft near the midnight (MLT = 2200~0200) and found the following magnetic field perturbation characteristics. (1) There is a strong seasonal dependence of geosynchronous magnetic field perturbations during the passage of IP shocks. That is, the SC-associated geosynchronous magnetic field near the midnight increases (a positive response) in summer and decreases (a negative response) in winter. (2) These field perturbations are dominated by the radial magnetic field component rather than the north-south magnetic field component at nightside geosynchronous orbit. (3) The magnetic elevation angles corresponding to positive and negative responses decrease and increase, respectively. These field perturbation properties can be explained by the location of the cross-tail current enhancement during SC interval with respect to geosynchronous spacecraft position.
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박종선,문규종,Park, Chong-Sun,Moon, Guy-Jong 한국통계학회 2008 Communications for statistical applications and me Vol.15 No.4
본 논문에서는 반응변수가 하나 이상이고 설명변수들의 수가 관측치에 비하여 상대적으로 많은 경우에 널리 사용되는 부분최소제곱회귀모형에 벌점함수를 적용하여 모형에 필요한 설명변수들을 선택하는 문제를 고려하였다. 모형에 필요한 설명변수들은 각각의 잠재변수들에 대한 최적해 문제에 벌점함수를 추가한 후 모의담금질을 이용하여 선택하였다. 실제 자료에 대한 적용 결과 모형의 설명력 및 예측력을 크게 떨어뜨리지 않으면서 필요없는 변수들을 효과적으로 제거하는 것으로 나타나 부분최소제곱회귀모형에서 최적인 설명변수들의 부분집합을 선택하는데 적용될 수 있을 것이다. Variable selection algorithm for partial least square regression using penalty function is proposed. We use the fact that usual partial least square regression problem can be expressed as a maximization problem with appropriate constraints and we will add penalty function to this maximization problem. Then simulated annealing algorithm can be used in searching for optimal solutions of above maximization problem with penalty functions added. The HARD penalty function would be suggested as the best in several aspects. Illustrations with real and simulated examples are provided.
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대중이 지각한 크라우드소싱의 과업 특성이 참여의도에 미치는 영향에 관한 연구
박종선(Park, Jong Sun),김형준(Kim, Hyung Jun) 한국소비문화학회 2015 소비문화연구 Vol.18 No.4
Through fast growth of internet and the emergence of Web 2.0, many companies have focused on open innovation combining with internal/external knowledges and competences without the boundaries to intensify the competitiveness. Crowdsourcing, a compound word of crowd and outsourcing, is one of the most effective ways to implement open innovation and pursues various competences and expertises distributed among the crowds. The purpose of this study is to investigate the effects of the job characteristics the crowds perceived on their intrinsic motivation and find out the effects of intrinsic and extrinsic motivation on crowds’ participation intention. To meet the purpose, a survey was conducted to collect data and out of 254 people, only 107 people answered they have ever participated at crowdsourcing. Therefore only 107 answers were used to analysis and for data analyzing. With SPSS 21.0, reliability and validity and with Smart PLS2.0., structural model validation, model fit, and path analysis were confirmed. The results are as following. First, skill variety, task identity and task significance out of the five core job characteristics, were positively related to intrinsic motivation. Next, intrinsic and extrinsic motivations had an positive effect on participation intention. According to the advanced research, intrinsically motivated people tend to find many alternative solutions and new approaches, traditionally not used, because they are more flexible and patient in cognitive aspects. Also, extrinsic motivation of financial rewards and non-financial rewards revealed important motivational factors. These results indicate that when the companies try to utilize crowdsourcing, they could consider the job redesign reflecting skill variety, task identity and task significance of this study results and incentive mechanism that motivates the crowds. 본 연구는 기업이 외부자원을 활용하는 효과적인 방법 중 하나인 크라우드소싱의 활성화를 위해, 대중의 참여에 영향을 미치는 요인들을 실증적으로 살펴보았다. 참여의도에 영향을 미치는 것은 동기이며, 내재적 동기에 영향을 미치는 선행요인을 크라우드소싱 상에서 대중이 수행하는 과업의 특성으로 보고, 대중이 지각하는 과업의 특성이 내재적 동기에 미치는 영향을 검증하였다. 그리고 동기를 내재적 동기와 외재적동기로 나누어 각각이 참여의도에 미치는 영향을 파악하고자 한 것이다. 이에 따라 직무특성이론에서 주장하는 바와 같이 크라우드소싱 상에서 수행하게 되는 핵심 과업의 특성이 내재적 동기에 영향을 미치며, 내재적/외재적 동기가 참여의도에 영향을 미친다는 가설을 설정하였다. 설문조사를 이용한 실증 연구를 수행하였으며 응답자 중 크라우드소싱에 참여한 경험이 있는 대상자, 107명의 응답을 분석하였다. SPSS21.0을 이용하여 신뢰성, 타당성을 분석하였으며 Smart PLS 2.0.을 사용하여 측정모형의 타당성을 검증하고 모형 적합도 및 경로분석을 실시하였다. 그 결과 기술다양성, 직무정체성, 직무중요성은 즐거움과 인적자본의 내재적 동기에 영향을 미치는 것으로 나타났으며, 즐거움과 인적자본으로 구성된 내재적 동기와 금전적 보상과 비금전적 보상으로 구성된 외재적 동기는 각각 참여의도에 영향을 미치는 것으로 나타났다. 본 연구는 기존에 인사조직분야에서 널리 활용되고 있는 직무특성이론의 관점을 크라우드소싱이라는 새로운 현상에 적용해 보았다는 것과 주로 정성적 방법으로 이루어진 다양한 선행연구들을 바탕으로, 공통적·보편적으로 나타나는 동기요인들을 추출하여 정량적 조사를 실시하였다는 데 의미가 있다. 또한 앞으로 기업이나 조직이 크라우드소싱을 활용하고자 할 때, 본 연구에서 제시한 과업의 특성과 동기요인들을 고려하여 크라우드소싱을 설계한다면 대중의 참여를 이끄는데 도움이 될 것으로 기대된다.
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