• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.12
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• pp.353-362
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• 2018

The national loss caused by the periodic livestock epidemic is very large. In addition, vehicle movement is the main cause of livestock epidemics in Korea. In this context, this study analyzed the relationship between the degree centrality of livestock facilities and the outbreak of infectious diseases. For this purpose, a livestock vehicle movement network was constructed using the facility entrance data provided by KAHIS. Afterwards, the centrality index was derived for each facility in the vehicle movement network and the mean centrality index of the epidemic and non-epidemic facilities were compared. The analysis results are summarized as follows. First, the degree centrality of epidemic facilities is significantly greater than non-epidemic facilities. As a result of the analysis of the entire period data and the period-based data, in most data, the degree centrality of facilities where livestock infectious diseases occurred was significantly greater than most non-occurrence facilities. Second, in the entire period data, the difference in degree centrality between the epidemic and non-epidemic facilities was smaller for HPAI than for FMD. On the other hand, no significant difference was found in the results of the analysis according to the divided period. The policy implications of the results are as follows. First, proactive management of facilities based on centrality is needed. Second, in the case of cloven-hoofed animal facilities, it is more urgent to introduce a management policy based on the degree centrality.

• Journal of Korea Game Society
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• v.19 no.1
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• pp.5-14
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• 2019

This paper presents a practical method to compute the closest approach distance of two ellipsoids in their inter-center direction. This is the key technique for collision handling in the dynamic simulation of rigid and deformable bodies approximated with ellipsoids. We formulate a set of equations with the inter-center distance and the contact point and normal for the two ellipsoids contacting each other externally. The equations are solved using fixed-point iteration and Aitken's delta-squared process. In addition, we introduce a novel stopping criterion expressed in terms of the error in distance. We demonstrate the efficiency and practicality of our method in various experiments.

• 한국벤처창업학회:학술대회논문집
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• 2023.04a
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• pp.39-44
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• 2023

우리나라에서는 벤처생태계의 구성이 태생적으로 정부 주도로 법제화된 정부자금의 지원이 기초가 되어 이루어지면서 공적 자금의 정책적 목적에 따라 운영되어왔다. 따라서 벤처투자기구에 대해서 이해상충 가능성 배제, 고도의 윤리성, 공정성 및 투명성 등을 요구하는 등 강한 규제가 반영되게 되었다. 이러한 공적규제가 일면 타당성이 있을 수 있으나, 공적규제 위주의 관리감독 체계는 규제의 영향을 크게 받는 한국 벤처투자 시장의 성격상 민간자금의 유입을 제한할 수 있다. 민간 중심의 벤처투자 시장으로 전환하기 위해서는 공적규제를 강화하기보다는 자율규제 영역을 확대하여 업계의 전문성과 효율성에 친화적인 규제 환경을 조성할 필요가 있다. 따라서 본 연구에서는 벤처투자 시장의 자율규제 가능 영역을 살펴보고, 벤처투자기구의 운용사 관점에서의 자율규제 방안을 제시하였다. 구체적 방안 중 하나로는 출자자 사이의 자치적 규범이라고 할 수 있는 규약의 표준이 참여자의 전문적인 식견을 최대한 반영하여 마련된 것이므로, 펀드 결성 이후 출자자 사이의 규약을 둘러싼 분쟁이 발생하는 경우 이를 자율적으로 해결할 수 있는 1차적인 분쟁 조정 절차를 마련해 볼 수 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.6
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• pp.137-146
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• 2018

The purpose of this study was to derive and analyze the hub facilities that occupy major positions in the vehicle movement networks of livestock facilities. For this purpose, this study used the KAHIS data provided by Animal and Plant Quarantine Agency. The hub facilities were derived from the degree centrality & betweenness centrality. The analysis results are summarized as follows. First, in a livestock facility's vehicle movement network, there are a small number of hub facilities with very high centrality indicator values compared to other facilities. Second, the hub facilities based on the degree centrality are the feed factory, the milk collecting center, slaughterhouse, slaughterhouse for chicken, and livestock markets. Third, the hub facilities based on the betweenness centrality are the livestock markets, the feed factory, and slaughterhouse. Fourth, hub facilities based on the degree centrality are concentrated in a particular area, but the hub facilities based on betweenness centrality are distributed relatively evenly.

• Journal of Food Hygiene and Safety
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• v.33 no.1
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• pp.23-30
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• 2018

The purpose of this research was to introduce network analysis method for analyzing pesticide residues in incongruity commercial agricultural commodities. Based on the "results in pesticide residues on incongruity commercial agricultural commodities" on "Guidelines for food safety management 2017", we used centrality analysis for pesticide residues via degree, closeness and betweenness centrality measurement. In case of degree centrality result, chlorpyrifos and diazinon were the most highly "connected node" in pesticide network. For the closeness centrality result, the most pesticides showed the similar closeness trend except for 19 species of pesticides. Fludioxonil and chlorpyrifos are recognized as the "bridge" of pesticides network with their high betweenness centrality. The results of network analysis show the "relation" data, which could not represent through out the conventional statistical analysis, among the pesticide residues. We hope that the network analysis method will be appropriate and precise tool for analyzing pesticide residues via elaboration and optimization.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10d
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• pp.295-297
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• 2002

본 연구에서는 정보 검색의 효과를 향상시키기 위한 방안으로 개념망을 제안한다. 개념망은 주어진 문서의 집합에서 제시된 주요 개념을 추출하고, 추출된 개념들 사이의 관련성을 분석하여, 관련성이 높은 개념 사이에는 링크를 설정함으로써 개념을 노드로 하는 네트워크를 구성한 것이다. 개념 추출과 링크 설정은 문서에 출현하는 명사의 출현 빈도를 근거로 하였다. 사용자가 정보검색을 위하여 키워드를 입력하면 본 시스템은 입력된 키워드를 중심으로 구축된 개념망을 제시한다. 사용자는 제시된 개념망을 조사함으로써, 자신이 입력한 단어가 검색하고자 하는 목표개념을 적절히 반영한 단어인지 확인할 수 있고, 새로운 검색어를 추가하거나 기존의 것을 수정함으로써 검색의 효과를 향상시킬 수 있다.

• Journal of the Korea Convergence Society
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• v.9 no.5
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• pp.61-67
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• 2018

This study was conducted to ascertain the mediating effects of aggression in high school students' relationship with smartphone overuse and cyberbullying. Data were collected from 328 high school students in K city using self-report questionnaire. The collected data were analyzed using SPSS 22.0 and AMOS 22.0. The results show that cyberbullying has a positive correlation with smatrphone overuse(r=.321, p<.001) and aggression(r=.397, p<.001). Smartphone overuse had a direct effect on aggression(${\beta}=.195$, p=.014) and aggression had a direct effect on cyberbullying(${\beta}=.260$, p=.007). In addition, the mediation effects of aggression on the relationship between smartphone overuse and cyberbullying were confirmed(${\beta}=.051$, p=.007). In order to reduce cyberbullying in high school students, it will be necessary to develop cyber ethical awareness education programs to reduce aggression as well as regulations on excessive use of smartphones.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.5
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• pp.508-515
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• 2020

This study examined the research trends of "Microplastic in food" with a scholar databaseusing the centrality analysis method. The data was based on research papers published from 2011 to 2020, sorted by "microplastic" and "food". The centrality analysis methodology(Degree centrality, Closeness centrality, Betweenness centrality) was applied, followed by a keyword-based frequency occurrence analysis. The results suggested that more than 30% of the total keywords were related to "marine" and "pollution". Therefore, research on the effects of microplastic pollution on the ecosystem had mainly been conducted. On the other hand, only 6% of the keywords were related to "toxicity" and "ingestion". Hence,the number of studies on microplastic exposure caused by bioaccumulation or food are still insufficient. These results can be used to provide directions for future research, as well as provide basic data for political decision-making on the environmental hazards of microplastic.

• Journal of Korean Philosophical Society
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• v.148
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• pp.73-99
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• 2018

This paper aims to search existential phenomena of today's anxiety and reveal philosophical grounds in the diagnosis and therapy of the anxiety. In special, this writer intends to look into the source of anxiety through a psychological dimension and a ethical dimension and lay an emphasis on the philosophical grounds as a psychological phenomenon. For this, the anxiety is revealed as 'between-mood(Zwischenstimmung)' accompanied by the moment between split and integration of existence as between-being(Zwischesein)' of possibility and reality. My attention on 'betweenness(Zwischeheit)' which existence contains as the ground of anxiety is described by $S{\ddot{o}}ren$ Kierkegaard in the concept of synthesis but his concept of synthesis as 'the relation between two things' has not been fully noted even owing to the term of synthesis. This writer catches more intensive conditions which the existence concept has through the illumination as to betweenness(Zwischenheit). So this writer takes note of the process of tension between both sides instead of the result of the synthesis of both divided sides. For this objective this writer intends to analyze Concept of Anxiety(Der Begriff Angst) of $S{\ddot{o}}ren$ Kierkegaard, Pioneer of existential philosophy.

• Journal of the Korean association of regional geographers
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• v.23 no.1
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• pp.23-46
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• 2017

This article examines the sexualization of place under conditions of the compressed modernization and reflexive cosmopolitanism. In particular, I adopt Michel de Certeau's spatial didactic model of strategy and tactic to investigate the dynamics at play in the gay labelling of a Coffee Bean & Tea Leaf (Coffee Bean) in South Korea, and explore the 'gaying' that takes place within preconceived heteronormative space. Using interview data, I additionally explore the negotiation tactics and coping mechanisms at work when gays compete with heterosexuals for non-gay place. The results illustrate how gays gay in heteronormative space and how heteronormative space harmoniously embodies gay men. The findings suggest that spatial location and tactic play important roles in stimulating compromise of sexual territory. Gay Bean benefits from being nestled between locations with histories of tolerance, while it also prospers from reflexive cosmopolitan ideals of diversity and acceptance of others. Gay identity and gaying is interpreted as foreign in Korea, which buttresses gay performativity in spaces welcoming of foreigners and so-called "deviance." However, how gaying functions within place relies not only on spatial histories of tolerance outside, but also on the tactics of identity negotiation within. The findings suggest that spatial and tactical conditions induce gay individuals to police other gay-identified individuals when gays gay in so-called heteronormative places.