• Journal of Astronomy and Space Sciences
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• 제21권3호
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• pp.191-200
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• 2004

The accuracy of CCD observations obtained at the Korean 1.8m telescope has been studied. Seventeen comparison stars in the vicinity of the cataclysmic variable BG CMi have been measured. The 'artificial' star has been used instead of the 'control' star, what made possible to increase accuracy estimates by a factor of 1.3-2.1 times for 'good' and 'cloudy' nights, respectively. The algorithm of iterative determination of accuracy and weights of few comparison stars contributing to the artificial star, has been presented. The accuracy estimates for 13-mag stars are around $0.^m002$ mag for exposure times of 30 sec.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.785-786
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• 2006

Performance comparison of IPMSMs with distributed and concentrated winding is presented in this papcr. Two IPMSMs have been designed and fabricated with identical rotor dimension, air-gap length, series turn number, stator outer radius, and axial length except winding configuration. Basic parameters and machine performance, such as resistances, back emf, output torque, and efficiency, are compared. From the comparison results, motor design considering winding configuration is discussed.

• 한국의류학회지
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• 제39권1호
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• pp.1-14
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• 2015

This study examines the effect of sociocultural attitude toward appearance and appearance comparison on appearance management behavior by adolescents. The study examines the differences of the effect relationships among the three variables according to adolescents' sex and school grade. The questionnaire was administrated to 575 middle school and high school students in Gwangju from September 2-8, 2011. Data were analyzed by descriptive statistical analysis, frequency analysis, factor analysis, reliability analysis, and regression analysis by SPSS for WIN program. The results were as follows. First, the sociocultural attitude toward appearance was composed of two factors: internalization and awareness. Adolescent's appearance management behavior was composed of four factors: hair and style, face, weight, and neatness. There are significant differences on sociocultural attitude toward appearance and appearance management behavior by gender, age (girl/middle, boy/middle, girl/high, boy/high). Second, the sociocultural attitude toward appearance significantly influenced appearance management behavior with significant differences among groups. Third, the sociocultural attitude toward appearance significantly influenced the appearance comparison and there are significant differences among groups. Fourth, appearance comparison significantly influenced appearance management behavior with significant differences among groups. Fifth, the sociocultural attitude toward appearance mediated by appearance comparison statistically did not influence appearance management behavior.

• Nuclear Engineering and Technology
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• 제52권7호
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• pp.1511-1516
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• 2020

The Korea Research Institute of Standards and Science (KRISS) established a new standard of the absorbed dose to water in LINAC X-ray beams. To confirm the equivalence of the new standard with other national metrology institutes (NMIs), a bilateral comparison study of the absorbed dose to water in high energy X-ray beams was performed between the KRISS and the National Metrology Institute of Japan (NMIJ). The comparison was made in-directly. Three transfer chambers were calibrated in the high energy X-ray beams by both laboratories and the calibration coefficients were compared. The average ratios of the calibration coefficients of the three transfer chambers obtained by the KRISS to those obtained by the NMIJ were 1.004, 1.006, 1.006, 1.007 for 6, 10, 15 and 18 MV X-ray beams, respectively. The calibration coefficients obtained at the KRISS were higher than those at the NMIJ but they were in good agreement within the expanded uncertainty of 1.0% (k = 2). The results of this study will be used as the evidence for the KRISS standard being comparable with those of other NMIs, temporarily, in the interim period up to finalizing a key comparison study, BIPM.RI(I)-K6 managed by the Consultative Committee for Ionizing Radiation.

• 한국지역지리학회지
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• 제5권1호
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• pp.137-150
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• 1999

우리나라에서 위성자료를 이용한 토지이용에 관한 연구는 현황분석이 중심이고, 토지이용 변화에 관한 연구는 분석기법에 대한 적실성 평가 없이 특정기법이 적용되어 왔다. 본 연구는 도시지역의 토지이용 변화 검색에 많이 활용되고 있는 다섯 가지 토지이용 변화 검색기법을 선정하여 대구광역시 북구를 사례로 각 검색기법의 정확도를 비교 분석하였다. 핵심데이터는 1994년과 1997년에 촬영한 Landsat TM영상과 항공사진이다. 위성자료를 이용한 토지이용 변화검색에는 pre-classification comparison method가 post-classification comparison method보다 효과적이었다. Pre-classification comparison methods 중에서는 image differencing method가, 특히 임계치 1.0에서의 image differencing method의 DIF2 변화이미지의 경우가 가장 정확도가 높게 나타났다.

• 대한통합의학회지
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• 제11권1호
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• pp.121-130
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• 2023

Purpose : This study aimed to investigate the effect of blood flow restriction exercise on ankle muscle strength and balance ability to achieve maximum efficiency with the same exercise intensity and time. Methods : Twenty-six adults are randomly assigned to experimental group (n=13) and comparison group (n=13). The experimental group performed ankle joint strength exercises with blood flow restriction applied while the comparison group performed ankle joint strength exercises without blood flow restriction applied three times a week for four weeks. The digital muscle measurement, Y-balance test, and Cumberland ankle instability tool were used to evaluate the subject's muscle strength, dynamic balance, and ankle instability index before and after the intervention. Results : In within-group comparison muscle strength, all the two groups showed significant improvements post intervention (p<.05). In between-group comparison, there was significant difference in the change of dorsiflexion, eversion strength pre and post intervention (p<.05). but plantarflexion was no significant difference between pre and post intervention in the group comparison (p>.05). In within-group comparison dynamic balance, all the two groups showed significant improvements post intervention (p<.05). In between-group comparison, there was no significant difference in the change of Y-balance score pre and post intervention (p>.05). In within-group comparison ankle instability index, all the two groups showed significant improvements post intervention (p<.05). In between-group comparison, there was no significant difference in the change of CAIT score pre and post intervention (p>.05). Conclusion : The results of this study show that ankle joint strength exercise improved the strength and balance ability of those complaining of chronic ankle instability, and ankle joint strength exercise applied with blood flow restriction was more effective in dorsiflexion and eversion strength exercise than ankle joint strength exercise without blood flow restriction.

• 감성과학
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• 제21권2호
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• pp.113-124
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• 2018

비교질문 검사의 논리적 가정은 유죄인 조사대상자는 비교질문보다 관련질문에 주의를 더 기울이고 무죄인 조사대상자는 관련질문보다 비교질문에 주의를 더 기울인다는 것이다. 본 연구는 기능적자기공명영상(fMRI)을 이용하여 비교질문검사의 논리적 타당성을 검증하였다. 이를 위하여 실험참여자에게 모의 범죄를 수행하도록 한 후 유죄조건과 무죄조건에서 비교질문검사를 실시하면서 뇌 반응을 측정하였다. 뇌 영상을 촬영한 후에는 관련질문과 비교질문에 '아니오'라고 응답하는 것이 얼마나 심리적으로 부담되는지를 평가하도록 하였다. 행동 반응 결과, 유죄조건에서 비교질문보다 관련질문에 '아니오'라고 응답하는 것이 더 부담이 되는 것으로 나타났고 무죄조건에서는 두 질문 유형 간에 유의한 차이가 나타나지 않았다. 뇌 반응 결과, 유죄조건에서는 비교질문에 비해 관련질문이 제시되었을 때 우측 상측두회와 우측 하전두회에서 더 큰 활성화가 관찰되었다. 그러나 무죄조건 분석 결과 질문유형에 따른 뇌 영역 활성화 차이는 없는 것으로 나타났다. 이러한 결과에 근거하여 유죄조건과 무죄조건에 대한 비교질문검사의 논리적 가정을 논의하였다.

• 한국컴퓨터정보학회논문지
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• 제23권12호
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• pp.233-240
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• 2018

In this study, variables were constructed based on prior research to examine the impact of information system quality (information quality, system quality, service quality), customer value and satisfaction in hotel comparison site. The samples consist of 205 survey data drawn from hotel comparison site users. The collected data were analyzed by SPSS 24.0 and AMOS 21.0. According to results of the reliability and validity test, all were found reliable, and all items were included. The results are as follows: first, Among the information system quality (information quality, system quality, and service quality) of the hotel comparison site, the information quality and service quality have positive effects on customer value. Second, the information system quality(information quality, system quality, and service quality) of the hotel comparison site has a positive effect on customer satisfaction. Third, the customer value of the hotel comparison site has a positive effect on customer satisfaction.

• International Journal of Advanced Culture Technology
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• 제8권2호
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• pp.289-296
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• 2020

Software copyright are written in text form of documents and stored as files, so it is easy to expose on an illegal copyright. The IOT framework configuration and service environment are also evaluated in software structure and revealed to replication environments. Illegal copyright can be easily created by intelligently modifying the program code in the framework system. This paper deals with similarity comparison to determine the suspicion of illegal copying. In general, original source code should be provided for similarity comparison on both. However, recently, the suspected developer have refused to provide the source code, and comparative evaluation are performed only with executable code. This study dealt with how to analyze the similarity with the execution code and the circuit configuration and interface state of the system without the original source code. In this paper, we propose a method of analyzing the data of the object without source code and verifying the similarity comparison result through evaluation examples.

• 한국초전도학회:학술대회논문집
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• 한국초전도학회 2001년도 High Temperature Superconductivity Vol.XI
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• pp.57-57
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• 2001