• 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.

• 한국의류산업학회지
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• 제22권4호
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• pp.469-480
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• 2020

The study investigated the effects of SNS usage on 20s and 30s female SNS users' internalization of thin body, body surveillance, appearance upper comparison, body dissatisfaction and eating disorders based on objectification theory and social comparison theory. The study examined differences on SNS usage and body image variables between high and low groups of SNS envy and self-compassion. Social Network Service (SNS) is used as a contemporary marketing tool for brands and companies. It also influences the body image of female SNS users. The survey used an online survey company for female SNS users in their 20s and 30s to analyze the effect of SNS usage. The results showed that SNS usage significantly impacted the internalization of a thin body, body surveillance and appearance upper comparison. The internalization of thin body also had a significant impact on body surveillance and appearance upper comparison. Appearance upper comparison positively affected body dissatisfaction and eating disorders. Finally, the group with higher SNS envy showed higher SNS usage, internalization of thin body, body surveillance, appearance upper comparison, body dissatisfaction and eating disorders. The group with higher self-compassion showed opposite results. This study provided a theoretical expansion for a SNS and female body image study with objectification theory and social comparison theory. It also suggests positive SNS marketing strategies use for brands. Lastly, this study emphasized the importance of the proper use of SNS to protect the body image of SNS users.

• 한국의류산업학회지
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• 제23권2호
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• pp.186-199
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• 2021

SNS (social networking service) plays an important role in delivering information regarding fashion brands and providing a space for communication between fashion retailers and SNS users, as well as between users. This study primarily focuses on exploring the relationships among the motivation of SNS users and social comparison, clothing purchasing behaviors and the difference in the relationships according to individual characteristics. An online survey was conducted on Chinese female consumers in their 20's and 30's who had experience in fashion SNS. A total of 297 women completed online survey. The results of the study revealed that: (1) consumers who have stronger motivation of information seeking and interpersonal communication through fashion SNS reached more active upward comparison and peer comparison accordingly; (2) upward comparison had a significant effect on conspicuous consumption and bandwagon, while peer comparison had no significant effect; and (3) the self-esteem of fashion SNS users significantly moderated the effect of social comparison on conspicuous consumption and conformity consumption. This study contributed to expanding the knowledge on the relationships among the motivations of SNS users and social comparison, and shed light on Chinese SNS users' characteristics and purchasing behaviors in the fashion SNS context. This study also provides vital implications to fashion brands and retailers.

• 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.

• 센서학회지
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• 제30권5호
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• pp.349-356
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• 2021

The Korea Research Institute of Standards and Science (KRISS), a National Metrology Institute of Korea, participated in the second-round of the international key comparison CCT-K7.2021 of triple point of water (TPW) cells. For the key comparison, three TPW cells, one of which had been used in the old CCT-K7 comparison, were assigned as the national standard of the TPW. The temperature difference (ΔT) between the average of the new and old national standards and ΔT between the new national standard and the transfer standard were measured. The comparison between the new and old national standards indicated a temperature increase of 69.5 µK after both the standards were corrected for the isotopic composition. The uncertainty of the national standard of the TPW temperature was 28 µK, and the uncertainty of ΔT was 14 µK. Three aspects of improvements in the new comparison compared to the old one were noted: (1) inclusion of two quartz cells in the national standard strengthens its long-term stability; (2) the standard deviation associated with the measurement of ΔT was reduced from 21 µK to 9.6 µK; (3) and the measured immersion profile of the TPW cells was much closer to the theoretically predicted dependence.

• Human Ecology Research
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• 제57권2호
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• pp.295-305
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• 2019

This study examined the effects of social comparison orientation and stress coping styles on job-seeking stress experienced by university students. The participants of this study were 324 junior and senior students (151 males and 173 females) from six universities located in Seoul who were preparing for employment. They were asked to respond to a written questionnaire to measure research variables for the Job-Seeking Stress Scale, the Social Comparison Orientation Scale, and the Ways of Coping Checklist. The data were analyzed by means of descriptive statistics and a hierarchical multiple regression. The major findings of this study were as follows. First, social comparison orientation had a positive effect on job-seeking stress of university students, revealing that students with a high level of social comparison orientation were more likely to experience job-seeking stress. Second, both emotion-alleviation coping style and wishful thinking coping style increased level of job-seeking stress. In addition, problem-focused coping style had a negative influence on job-seeking stress, whereas social support seeking coping style had no significant effect on it. The results suggested that it would be possible to reduce job-seeking stress of university students by changing either social comparison or stress coping style.

• 대한본초학회지
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• 제27권1호
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• pp.27-34
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• 2012

Objectives : This study was performed to compare the preventive effect of water extracts from Saponariae Vaccariae Semen(SVS) and Melandryi Firmi Herba(MFH) on hyperlipidemia and liver damage induced by alcohol. Methods : Except for the normal group, I fed rat on 25% alcohol for 55 days. And each extract was administrated for the same period. I measured the serum component in rat's blood, body weight and weight of liver. Results : At first, I observed effects of SVS and MFH on hyperlipidemia induced by alcohol. SVS and MFH group didn't show the significant decrease of total cholesterol in comparison with those of the control group. SVS and MFH group showed the significant increase of HDL-cholesterol in comparison with those of the control group. SVS group showed the significant decrease of triglyceride in comparison with those of the control group, but MFH group didn't show the significant decrease of triglyceride in comparison with those of the control group. SVS group showed the significant increase of body weight in comparison with those of the control group at 4weeks and 8weeks. But, MFH group didn't show the significant changes of body weight in comparison with those of the control group at 4weeks and 8weeks. By the way, SVS group showed the significant decrease of triglyceride in comparison with those of MFH group. SVS group showed the significant increase of body weight in comparison with those of MFH group at 8weeks. At second, I observed effects of SVS and MFH on liver damage induced by alcohol. SVS and MFH group showed the significant decrease of AST(aspartate aminotransferase), ALT(alanine aminotransferase), ALP(alkaline phosphatase) and LDH(lactate dehydrogenase) in comparison with those of the control group. SVS group showed the significant increase of liver weight in comparison with those of the control group, but MFH group didn't show the significant increase of liver weight in comparison with those of the control group. By the way, SVS group showed the significant increase of liver weight in comparison with those of MFH group. Conclusions : Reviewing these experimental results, it suggests that water extracts from SVS and MFH have pharmaceutical preventive efficacy on hyperlipidemia and liver damage induced by alcohol. Therefore further additional study should be conducted to elucidate the pharmaceutical efficacy of these in depth.

• 한국콘텐츠학회논문지
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• 제16권12호
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• pp.574-590
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• 2016

본 연구는 SNS에서의 다양한 형태의 사회 비교 경험들이 SNS 이용자들의 삶의 만족도에 어떤 영향을 미치는 지를 살펴보고자 하였다. 이를 위해, SNS에서의 사회 비교 경험 유형으로서 상향 대조, 상향 동일시, 하향 대조, 하향 동일시 등 4가지를 도출하여 이들 경험 유형들이 SNS 이용자의 삶의 만족도에 어떤 영향을 미치는 지를 살펴보았다. 또한 영향 과정에서 인구 통계학적 요인들, SNS 이용 시간, 오프라인 사회자본 및 사회비교 지향성 등을 통제 변인으로서 고려하였으며, 사회 비교 경험들과 삶의 만족도 관계에서 사회비교 지향성의 조절 효과 역시 살펴보았다. 자료 수집을 위해선 온라인 설문을 이용하였고, 수집된 자료는 위계적 회귀 분석을 통해 분석되었다. 분석의 결과 연령과 혼인 여부가 삶의 만족도에 영향을 미치는 것으로 나타났으며, 가족 및 관심사가 맞는 클럽/단체 활동 참여 정도가 삶의 만족도와 연관이 있는 것으로 나타났다. 더불어 분석 결과에 따르면 4가지 사회 비교 경험 유형 중 상향 대조와 상향 동일시만이 삶의 만족도에 영향을 미치는 것으로 나타났으며, 사회 비교 지향성은 상향 동일시 경험과 삶의 만족도 관계에서만 조절 효과를 보이는 것으로 나타났다. 연구 결과를 바탕으로, SNS에서의 사회 비교 경험들을 이해함에 있어 기존 연구와는 다른 새로운 시각들이 필요함에 대해서도 또한 논의되었다.

• Journal of applied mathematics & informatics
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• 제7권2호
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• pp.539-552
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• 2000

In this paper, we established the general comparison principles for IVP of impulsive differential equations with time variables, which strictly extend and improve the precious comparison results obtained by V. Lakes. et.al . and S.K.Kaul([3]-[7]). Whit the general comparison results, we constructed the monotone iterative sequences of solution for IVP of such equations which converges the maximal and minimal and minimal solutions , respectively.

• Industrial Engineering and Management Systems
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• 제11권2호
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• pp.176-182
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• 2012

This paper presents a new approach to risk comparison in uncertain environment. Based on the uncertainty theory, some uncertain risk measures and risk comparison rules are proposed. Afterward the bridges are built between uncertain risk measures and risk comparison rules. Finally, several comparable examples are given.