• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.269-272
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• 2004

1950년대 동란을 거쳐 1960년대 초반부터 시작된 경제개발계획에 의해 급격한 경제성장으로 인해 산업 인구의 대도시 집중화에 의하여 전기의 공급력 부족 현상은 지속되었다. 따라서, 이때부터 성장한 경제배전계통은 수적으로도 많고 광범위하게 산재되어 있어 인력에 의해서는 더 이상 효과적인 관리가 어렵게 되었고, 사회가 고도 정보화로 진전되면서 수용가는 한층 더 높은 공급 신뢰도와 고품질의 전력공급을 요구하고 있다. 이러한 변화에 따라 전력공급자는 전력계통에 대한 감시와 제어를 통하여 항시 안정적이고 신뢰성있는 운용을 하여야한다. 이에 따라 배전계통에 설치된 배전설비를 컴퓨터와 통신수단을 이용하여 원격지에서 감시 제어할 수 있는 배전자동화 시스템에 대한 연구가 오래 전부터 이루어져 왔으며 효과적으로 양질의 전력을 공급하고자 배전자동화 시스템(DAS)이 도입되었다. 본 연구에서는 능동적인 감시 및 제어기능을 제공하는 객체지향형 능동데이터베이스 알고리즘을 사용하여 배전계통 제어에 적용하였고 기존의 인터넷 통신망을 통한 감시 및 제어가 가능하게 하였으며 이러한 효과에 의해 배전계통이 여러개의 다른 전력회사로 분할될 경우 각기 존재하는 다른 시스템에 대하여 인터넷을 통한 연계가 가능하도록 하여 통합적인 데이터베이스를 구축하는데 용이하게 하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.2
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• pp.439-449
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• 2019

The development of information technology represented by ICBMA (IoT, Cloud, Big Data, Mobile, AI), is leading to a surge in data and a numerical and quantitative increase in data centers to accommodate it. As the data center is recognized as a social infrastructure, It is very important to identify physical security threats in advance in order to secure safety, such as responding to a terrorist attack. In this paper, we develop physical security threat breakdown structure (PS-TBS) for easy identification and classification of threats, and verify the feasibility and effectiveness of the PS-TBS through expert questionnaires. In addition, we intend to contribute to the improvement of physical security level by practical use in detailed definition on items of PS-TBS.

• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.23-33
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• 2021

This study analyzed news articles about 'Young-Kl' reported by 11 media outlets, identifying news frames and quotation frames. Using a semantic network analysis, this study inspected the quotations frames and measured the frequency of the quotes and sources types. Also, the concentration index of the frames was measured. The results showed that news frames consisted of 10 topics and quotation frames consisted of 14 topics. Although the differences among quotation frames by media as well as by source types were observed, the concentration index of sources such as government, political arena, and business appeared high. Therefore, this study suggested that numerical diversity of news sources would not establish the diversity of news frames.

• 한국벤처창업학회:학술대회논문집
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• 2023.04a
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• pp.129-133
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• 2023

소상공업은 서민 경제의 근간을 이루는 중요한 부분으로서, 일반 대중과 가까이에 있으며 경제 환경에 가장 민감하게 반응한다. 또한 수적인 측면과 고용창출의 측면에서 대기업 혹은 중소기업만큼 우리 경제에 큰 영향을 미치고 있다. 그러나 국내 소상공인의 창업과 폐업현황을 살펴보면, 전체 창업률은 2.1%, 폐업률은 2.5%, 음식점 업종의 창업률은 2.8% 페업률은 3.1%로 조사되었다. 음식점 업종은 소상고인 폐업률이 가장 높은 업종이며, 음식점 중에서도 커피전문점은 창업률 3.2% 폐업률 4.5%로 창업과 페업이 빈번하게 반복되는 취약한 구조를 보인다. 이는 진입장벽이 낮은 업종은 대규모 소비시장이 아닌 특정 지역이나 계층에 대한 소규모의 무한한 시장을 형성하고 많은 자본이나 대규모 고용의 필요성이 낮다. 따라서 구체적인 사업계획서 없이도 창업하게 되어 운영을 위한 전문성이나 자금이 부족한 경우가 빈번하다. 소상공인으로 창업을 할 경우 창업프로세스가 전문성의 유무에 문제가 없기 때문에 용이하다. 그로인해 전문성이 없는 비전문가로 창업을 하는 경우가 비일비재이다. 대기업이다. 프랜차이즈에 비해 마케팅 믹스활동이 미흡한 것이 현실이다. 이에 고객이 인지하는 마케팅 믹스활동이 브랜드이미지와 브랜드 충성도에 미치는 영향으로 소상공인커피전문점의 마케팅 믹스활동을 중심으로 조사할 예정이다. 그리하여 비자발적 창업을 준비하는 커피전문점 소상공인에 시사점을 제공하여 창업 시 유의할 점을 파악하도록 할 것 이다. 본 연구는 설문조사를 통해 데이터를 수집한다. 대상은 소상공인을 이용하는 고객과 소상공인을 대상으로 마케팅믹스 7P's가 브랜드이미지와 브랜드 충성도에 미치는 영향을 파악하고자 한다.

• Journal of the Korean Geographical Society
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• v.47 no.4
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• pp.541-553
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• 2012

The development of Korean urban geography can be divided into several stages including initial stage, transition stage, and maturation stage. If this trend persists, it can be expected that it would turn into the matured stage. This paper intended to recall the research trends from 1960 to 2012, focusing on 686 papers and 177 books published during the last 62 years, and investigated by research areas, study regions, methodologies, and journals in relation to urban geography. Although increasing number of urban geographers has made mutual relationship more complex and diverse, no signs of school formation have yet been seen in Korean urban geography. Large portions of papers have concerned about Seoul Metropolitan Region for their study regions. There have been diversified trends of oversea studies away from the US cities to other cities in various countries. Also, quantitative studies have been increasing their weight since the 2000s. Moreover, articles on the Journal of the Korean Urban Geographical Society have been far surpassed in its number.

• Journal of Agricultural Extension & Community Development
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• v.21 no.2
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• pp.57-80
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• 2014

The fact that cooperation is an essential factor for foodservice industry success has been discovered by many business leaders. Success in entrepreneurial businesses depends upon cooperation. However, there has been a lack of studies done about cooperation in the service industry, particularly levels of cooperation among foodservice employees in an organization. This study is designed to understand the antecedents, servant leadership and trust in co-workers that have a resulting influence on cooperation among foodservice employees. To achieve the study objective, 191 valid questionnaires were statistically analyzed, using frequency analysis, factor, reliability analysis and multiple regression analysis. The following is a summary of my verified analysis. First, servant leadership have a positive influence on trust in co-workers. Second, trust in co-workers has a positive influence on cooperation among foodservice employees positively.

• Development and Reproduction
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• v.2 no.2
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• pp.157-163
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• 1998

Preimplantation embryos of the rat was examined by the morphological changes in the cortical granule envelope (CGE), blastomere surface, and zona pellucida (ZP) of embryo after cortical reaction. The ultrastructural characteristics and CGE of embryos were observed with the scanning electron microscope and fluorescence microscope. In the ultrastructural characteristic of embryo surface, surface microvilli were shortened and the CGE-like structure existed above microvilli in eight-cell embryo. Rough spongy surface and decreased network numbers were key characters of embryonic ZP compared to unfertilized oocyte. The CGE formed by cortical reaction existed in perivitelline space during embryo development but it was thin and locally distributed ill contrast to fertilized oocyte. The present results indicate that cortical reaction forms cortical granule envelope in perivitelline space and causes not only zona hardening, but also ultrastructural changes in ZP and cell membrane of preimplantation embryos.

• Journal of the Korean Society for Library and Information Science
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• v.44 no.2
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• pp.177-197
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• 2010

Public libraries in Korea have increased dramatically in number through the last 45 years.However, compared to the public libraries of the United States of America, United Kingdom of Britain, and Japan, public libraries in Korea tended to have a higher rate of capita visits per a public library, so public libraries' infrastructure in Korea is very inadequate. This research analyzed cooperative network cases for public libraries of London Borough of Camden, Ootaku in Janpan, and Bucheon City in Korea to deduct a plan to broaden the service area and to make management more efficient by managing based on the single-administrative district area as a regional library system. With these results this research excogitated a cooperative network model and a plan to make the management more efficient. As a conclusion, as public libraries increase in numbers we need to examine the proper scale, and we need to construct a central-concentrated system to enhance management efficiency between a central library and branch lib aries or small libraries.

• Korean Journal of Food Science and Technology
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• v.20 no.6
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• pp.742-748
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• 1988

The macro-and microstructure of Chinese cabbage used for Korean Kimchi preparation were examined and the texture characteristics of raw cabbage leaf and salted or blanched leaves were evaluated by cutting test. The length and thickness of leaf stalk increased with the order of pyllotaxis, but the thinning effect of outermost leaves was observed. The microstructure of cut-profile of stalk showed densely compacted vascular systems aligned in the center of stalk and the outer space was filled with large parenchima cells. Due to this structure, characteristic cutting curves were obtained by cutting test, composing three peaks of cutting for inner surface skin, center vascular system and outer surface skin. Salting and blanching increased the cutting force mainly due to the increase of Gutted cell wall number caused by the structure collapse.

• Journal of Soil and Groundwater Environment
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• v.21 no.6
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• pp.46-55
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• 2016

This experimental study was aimed to estimate interfacial tension of brine-$CO_2$ by using a pendant bubble method and image analysis. Measurements were performed for wide ranges of temperatures, pressures, and salinities covering reservoir conditions in Pohang basin, a possible candidate for $CO_2$ storage operation in Korea. The profiles of $CO_2$ bubbles in brine obtained from image analysis with the densities of brine and $CO_2$ from previous studies were applied to Laplace-Young equation for calculating interfacial twnsion in brine-$CO_2$ system. The experimental results reveals that the interfacial tension is significantly affected by reservoir conditions such as pressure, temperature and water salinity. For conditions of constant temperature and water salinity, the interfacial tension decreases as pressure increases for low pressures (P < $P_c$), and approaches to a constant value for high pressures. For conditions of constant pressure and water salinity, the interfacial tension increases as temperature increases for T < $T_c$, with an asymptotic trend towards a constant value for high temperatures. For conditions of constant pressure and temperature, the interfacial tension increases with increasing water salinity. The trends in changes of interfacial tension can be explained by the effects of the reservoir conditions on the density difference of brine and $CO_2$, and the solubility of $CO_2$ in brine. The information on interfacial tensions obtained from this research can be applied in predicting the migration and distribution of injecting and residual fluids in brine-$CO_2$-rock systems in deep geological environments during geological $CO_2$ sequestrations.