• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.372-375
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• 2006

The MSC is a high resolution multi-spectral camera system which is mounted on the KOMPSAT-II satellite. The electro-optic camera system has a refocusing mechanism which can be used in-orbit by ground commands. By adjusting locations of some elements in optics, the system can be focused precisely. The focus mechanism in MSC is implemented with stepper motor and potentiometer. By reading the value of the potentiometer, rough position of the motor can be understood. The exact location of the motor can not be acquired because the information from the potentiometer can not be so accurate. However, before and after certain events of the satellite, like a satellite launch, the direction of the movement or order of the magnitude of the movement can be understood. In this paper, the trend analysis of the focus motor position during the ground test phase is introduced. This result can be used as basic information for the focus calibration after launch. By studying the long term trend, deviation from the best focal point can be understood. The positions of the focus motors after launch are also compared.

• 품질경영학회지
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• 제30권3호
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• pp.195-202
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• 2002

The problem of trend change in the mean residual life is great Interest in the reliability and survival analysis. In this paper, a new test statistic for testing whether or not the mean residual life changes its trend Is developed. It is assumed that neither the change point nor the proportion at which the trend change occurs is known. The asymptotic null distribution of test statistic is established and asymptotic critical values of the asymptotic null distribution is obtained. Monte Carlo simulation is used to compare the proposed test with previously known tests.

• 품질경영학회지
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• 제30권4호
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• pp.78-85
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• 2002

The problem of trend change in the mean residual life is great interest in the reliability and survival analysis. In this paper, a new test statistic for testing whether or not the mean residual life changes its trend is developed. It is assumed that neither the change point nor the proportion at which the trend change occurs is known. The asymptotic null distribution of test statistic is established and asymptotic critical values of the asymptotic null distribution is obtained. Monte Carlo simulation is used to compare the proposed test with previously known tests.

• 지식경영연구
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• 제17권1호
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• pp.1-16
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• 2016

본 연구에서는 국내 지식경영 분야의 연구동향들이 어떻게 전개되어 왔는지 살펴보기 위해 한국지식경영학회의 지식경영연구 학술지에 2000년 부터 2015년까지 게재된 총 352개의 논문의 1496개의 키워드를 대상으로 그래프 이론 및 네트워크 모델을 이용하여 추세를 분석하였다. 분석 결과를 통하여 최근 각광받고 키워드들, 네트워크의 중심에서 멀어진 키워드들, 그리고 키워드들 간의 단절고리에 대하여 알아보았다. 연구자들은 본 연구결과를 활용하여 향후 지식경영 분야 후속연구의 설계 및 주제선정을 위한 기초자료로 삼을 수 있을 것이다.

• Journal of Information Processing Systems
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• 제18권3호
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• pp.359-373
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• 2022

The new crown pneumonia (COVID-19) has become a global epidemic. The disease has spread to most countries and poses a challenge to the healthcare system. Contact tracing technology is an effective way for public health to deal with diseases. Many experts have studied traditional contact tracing and developed digital contact tracking. In order to better understand the field of contact tracking, it is necessary to analyze the development of contact tracking in the field of computer science by bibliometrics. The purpose of this research is to use literature statistics and topic analysis to characterize the research literature of contact tracking in the field of computer science, to gain an in-depth understanding of the literature development status of contact tracking and the trend of hot topics over the past decade. In order to achieve the aforementioned goals, we conducted a bibliometric study in this paper. The study uses data collected from the Scopus database. Which contains more than 10,000 articles, including more than 2,000 in the field of computer science. For popular trends, we use VOSviewer for visual analysis. The number of contact tracking documents published annually in the computer field is increasing. At present, there are 200 to 300 papers published in the field of computer science each year, and the number of uncited papers is relatively small. Through the visual analysis of the paper, we found that the hot topic of contact tracking has changed from the past "mathematical model," "biological model," and "algorithm" to the current "digital contact tracking," "privacy," and "mobile application" and other topics. Contact tracking is currently a hot research topic. By selecting the most cited papers, we can display high-quality literature in contact tracking and characterize the development trend of the entire field through topic analysis. This is useful for students and researchers new to field of contact tracking ai well as for presenting our results to other subjects. Especially when comprehensive research cannot be conducted due to time constraints or lack of precise research questions, our research analysis can provide value for it.

• 한국물환경학회지
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• 제25권2호
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• pp.295-305
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• 2009

The purpose of this study was to understand of water quality characteristics of lake Paldang, especially at a certain representative site, right in front of Paldang dam ($P_2$ site) and to propose the directions of water quality management of lake Paldang. Water characteristics at $P_2$ site was investigated by principle components analysis and the Pearson correlation coefficient analysis. Also, seasonality was identified by the Kruskal-Wallis test and long term trend of nutrients and chlorophyll-a was analyzed by seasonal decomposition method at lake Paldang statistically. The primary factor affecting on water quality at $P_2$ site was identified as nutrients, while physical parameters, such as rainfall and inflow rate were also important factors. At the result of linear regression analysis particulate organic phosphorus (POP) vs total phosphorus (TP) showed very high correlation of 0.78. TP loading was increased annually from 1995 to 2006. Chlorophyll-a and nutrients show seasonality at $P_2$ site. Long term trend of Chlorophyll-a was increased by increase of TP at lake Paldang.

• 한국과학교육학회지
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• 제40권5호
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• pp.531-542
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• 2020

이 연구의 목적은 과학교육분야에서 꾸준히 지속해 오고 있는 융합교육을 선행연구와 비교를 통해 2011년 이후 융합교육 연구동향의 변화를 알아보고자 하였다. 과학교육분야의 융합교육관련 논문 발행 편수, 연구대상, 연구내용, 주제연계를 선행연구와 비교 분석하고, 최근 연구동향을 알아보는 네트워크 분석방법을 활용하여 융합교육의 변화를 알아보았다. 과학교육분야에서 융합교육관련 논문 편수는 8.0%이상 꾸준하게 발행되었으며 2012년부터 증가했다가 다시 2015년부터 낮아지고 2017년부터 다시 서서히 증가하는 경향성이 나타났다. 연구대상은 초등학생 대상이 높은 반면 중학생, 고등학생, 대학생 대상은 낮았다. 현직 교사는 증가한 반면에 예비 교사는 감소했고, 문헌과 일반은 다소 증가하였다. 연구내용에서 효과연구는 감소한 반면에 개발연구는 증가했으며, 이론 및 인식연구는 비슷하였다. 주제연계에서 과학 내 연계는 23.9%이고, 과학 외 연계는 76.1%이며, 과학 외 연계에서 공학·기술, 예술 연계가 높았다. 네트워크 분석에서 초등, 과학, STEAM, 프로그램 단어는 출현빈도가 높은 동시에 다른 단어들과 함께 등장하여 네트워크를 주도하고 있었다. 융합교육 연구동향에 대한 교육적 함의는 앞으로 과학교육분야에서 융합교육은 지속될 것이며, 교육 현장에 뿌리를 내리기 위해서는 중등학생을 대상으로 하는 연구가 더욱 활발히 이루어져야 한다는 것이다. 또한 STEAM 중심의 프로그램 개발 및 효과에 대한 연구에서 벗어나 융합교육의 철학적 근거 및 이론적 확립을 위한 연구가 늘어날 필요가 있다.

• 한방재활의학과학회지
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• 제26권1호
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• pp.49-61
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• 2016

Objectives To analyze the latest trend through the domestic studies of obesity and support further studies and clinical trials. Methods The theses were searched through KIOM OASIS (http://oasis.kiom.re.kr), The Journal of Society of Korean Medicine for Obesity Research, The Journal of Korean Medicine Rehabilitation. Then, domestic studies were gathered and classified by year, journal and type. Results 92 theses were included. The theses were constantly published every year. According to the analyzing by journals, the most published journal was The Journal of Society of Korean Medicine for Obesity Research. Through the analysis of type, 19 clinical studies and 11 case reports were found. The result of 43 theses analyzing survey and examination numerical value, the study of relationship between obesity and body index is the most published. Among 19 literary studies, 11 studies were searched domestic thesis, 2 studies were searched foreign thesis, 5 studies were searched domestic and foreign thesis simultaneously. Conclusions We need to effort to supplement the statistical error and the topic needs to be diverse. The sustainable research of The human body-oriented obesity studies is required.

• 대한예방한의학회지
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• 제17권1호
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• pp.137-147
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• 2013

Objectives : This study aims to report current trend of Mibyeong health policy and service in China from interview of China Technology Research Group. Methods : China Technology Research Group visited Guanganmen hospital, Yanhuang Dongfang Company, Xinjingzhen health center, and Shanghai Shuguang hospital. With an interpreter, We had interviews about Mibyeong health service and policy trend, medical instrument, and research issue. Results :Mibyeong health service was performed based on KY3H system and collaboration with traditional Chinese medicine hospital. Mibyeong health service consists of diagnosis with nine constitutional type, health guide and preventive treatment. Community health center also provide Mibyeong health service, with cooperative treatment of traditional Chinese medicine and western medicine. China's Mibyeong health policy is established by Top-down decision, even though there is not enough evidence for providing health service to consumer. Through constitutional diagnosis, examinations, and treatment, huge data have been stacked; however, assessment and research based on these data are not processed well. Cooperative treatment of traditional Chinese medicine and western medicine is widely provided to patients, and their works are relatively well classified. Conclusions : China plays leading role in Mibyeong service and it seems to be developed more than Korea's. Further study is necessary to establish Mibyeong policy and health service in Korea.

• 한국컴퓨터정보학회논문지
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• 제24권1호
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• pp.151-158
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• 2019

This study aimed to analyze the research trend related on obesity in physical education in Korea through the keyword network analysis and to establish a basic database for effective design of prospective studies. To achieve it the study crawled co-occured keywords with 'obesity' and 'physical education' from RISS and analyzed the list from 1990 to 2018. They include 25 journal papers and 38 dissertations. The results are as follows. First, recent 30 years 63 papers published in Korea with 'Obesity' and 'Physical Education', and there were 144 related keywords. Second, analyzing journals which have 'Obesity' and 'Physical Education', co-occured keywords in 4 centrality were 24 keywords(student, Korea, prevention, effect, level, body, activation, actual condition, lesson, child, investigation, participation, book, cause, activity, normal, degree, nutrition, physical strength, weight, elementary, light, inquiry, health), and 37 keyword occurred in top 30. Lastly, by CONCOR analysis the result could be divided into 2 clusters. One consists of the object of obesity and its invervention, and the other consists of negative keywords of obesity and its preliminery dimenstion. Through the result, this study showed the research trend which involves the concept of obesity in physical education in Korea. Through the result, prospective obesity research in physical education in Korea would be promoted.