• Journal of Information Science Theory and Practice
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• 제1권2호
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• pp.16-35
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• 2013

Relevance has a long history of scholarly investigation and discussion in information science. One of its notable concepts is that of 'user-based' relevance. The purpose of this study is to examine how users construct their perspective on the concept of relevance; to analyze what the constituent elements (facets) of relevance are, in terms of core-periphery status; and to compare the difference of constructions of two groups of users (information users vs. information professionals) as applied with a social representations theory perspective. Data were collected from 244 information users and 123 information professionals through use of a free word association method. Three methods were employed to analyze data: (1) content analysis was used to elicit 26 categories (facets) of the concept of relevance; (2) structural analysis of social representations was used to determine the core-periphery status of those facets in terms of coreness, sum of similarity, and weighted frequency; and, (3) maximum tree analysis was used to present and compare the differences between the two groups. Elicited categories in this study overlap with the ones from previous relevance studies, while the findings of a core-periphery analysis show that Topicality, User-needs, Reliability/Credibility, and Importance are configured as core concepts for the information user group, while Topicality, User-needs, Reliability/Credibility, and Currency are core concepts for the information professional group. Differences between the social representations of relevance revealed that Topicality was similar to User-needs and to Importance. Author is closely related to Title while Reliability/Credibility is linked with Currency. Easiness/Clarity is similar to Accuracy. Overall, information users and professionals function with a similar social collective of shared meanings for the concept of relevance. The overall findings identify the core and periphery concepts of relevance and their relationships in terms of coreness, similarity, and weighted frequency.

• East Asian Economic Review
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• 제26권3호
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• pp.205-225
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• 2022

Different types of corporate ownership may affect the environment among firms and could influence the decisions of new entities in the region. This study determines the role of state-owned enterprises (SOEs) in hindering new foreign manufacturing firms in the Yangtze River delta (YRD). The negative binomial regression is used for city-sector level data and the following points summarize the results: Firstly, the unique privileges that SOEs enjoy alongside governmental support create difficulties for foreign firms trying to establish themselves near existing SOEs. Secondly, although core cities are more attractive to foreign firms than peripheral cities, the role of core-periphery reveals that, in spite of all the regional advantages core cities could offer, whenever the share of SOEs is higher, the core-periphery system will have an adverse impact on new foreign firms. In other words, government preference for SOEs can suppress the attraction of foreign start-ups. However, after 2008, the governmental authorities finally succeeded in implementing their promising policy of fair treatment and competition in only the core cities.

• 한국정보시스템학회지:정보시스템연구
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• 제31권1호
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• pp.115-146
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• 2022

Purpose The purpose of this study is to find meaningful insights using regression analysis to resolve the digital divide between generations. In the analysis process of this study, social network analysis was applied to approach it with a perspective differentiated from the existing statistical techniques. Design/methodology/approach This study used a social network analysis methodology that transforms and analyzes government-led survey data into relational data. First, the cross-sectional data were converted into relational data, and a continuous core-periphery model and multidimensional scaling method were applied. Afterwards, the relationship between various factors affecting the digital divide and the difference in influence were analyzed by generation. Findings According to the network analysis results, it can be seen that all generations commonly use 'information and news search' and 'living information service'. However, it can be seen that the centrally used services of each generation are clearly different from each other, and the degree of linkage between the services is also clearly different. In addition, it can be seen that the relationship between factors influencing the digital divide by generation is also different.

• Applied Biological Chemistry
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• 제39권3호
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• pp.200-205
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• 1996

본 실험에서는 수박 (Citrullus vulgaris L.)과 멜론 (Cucumis melo val. reticulatus Naud.)에 있어서 서로 다른 부위에 함유되어 있는 주요 유리당 (glucose, fructose, sucrose, maltose)을 분리, 정량하기 위해서 HPLC (High Performance Liquid Chromatography)를 이용하였다. 수박과 멜론에 있어서 주로 존재하는 유리당들은 fructose, glucose, sucrose 등이며, 이 유리당들의 함량은 부위별로 다양한 변이를 보였다. 부위별 유리당의 총함량은 stem end 부위에서의 함량보다 stylar end와 side 부위에서의 함량이 더 높았다. 이러한 결과는 수박과 멜론에서 같은 양상이었다. 수박의 경우 전체 유리당 함량은 과피 부위에서 중심 부위로 갈수록 약간씩 증가하는 경향을 보였고, 멜론의 경우 종자를 포함하는 중심 부위를 제외한 가식 부위에서는 과피 부위에서 중심 부위로 진행될수록 증가하였다. 환원당과 비환원당의 비율[(fructose+glucose)/sucrose]은 수박의 경우 과피 부위에서 중간 부위로 갈수록 약간식 감소하였으나 중심 부위에서는 오히려 높았다. 멜론의 경우 가식 부위중 과피 부위에서 중간 부위로 갈수록 감소하였으며 중심 부위와 중간 부위 간에는 유의적 차이가 없었다. 수박에서는 과피 부위에서 중심 부위로 갈수록 환원당과 비환원당 모두가 증가하였지만, 반면에 멜론에서는 환원당의 감소를 보였다.

• 디지털산업정보학회논문지
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• 제12권4호
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• pp.163-169
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• 2016

This study is to analyze factors affecting a growth of online community with perspectives of social network. Particularly this study tries to explore structural phenomenon built by interactions between users in a certain of free board belonging to the online community, in which focuses on one's writing a comments responding on those of others. With using SNA(Social Network Analysis), the social network data calculated from users' interaction shown as their comments were collected to draw out each individual's centrality value representing the structure of the online community and also we estimated duration time and the number of each comments as a proxy variable representing growth of the online community. And then cause-and-effect relationship between individual's centrality value and the duration time and the number of each comment were analyzed. As a result of the analysis, Core-Periphery, Centralization and Reciprocity have significant effects on the duration time and the number of each comment, therefore those significant values representing online structure will give an implication to manage, to promote the online community, to forecast its evolution path and to build critical policies.

• Asia pacific journal of information systems
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• 제29권1호
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• pp.117-143
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• 2019

Advances in information technology (IT) bring about technological innovation in financial businesses, referred to as financial technology (fintech), beyond the traditional financial industry. While fintech implies more convenient and various financial services to customers, it leads to more complexity in the financial sector, as different industry players (e.g., IT firms) can participate in financial businesses. The complexity of fintech causes controversial issues related to policies and the appropriate development direction. In order to provide insight into the current state of fintech, this study explores the fundamental understanding of the fintech phenomenon from the perspective of the major stakeholders (i.e., financial authorities, financial companies, IT firms) in South Korea. This study analyzed news articles, where those stakeholders expressed their arguments, by using a content analysis. The study also conducted an intensive examination of their arguments by using a core-periphery approach of social representations. This study found that while the three beholders had a common opinion on deregulation of the fintech industry, each of them had different knowledge of the phenomenon. By revealing each beholder's structure of representations of fintech, this study not only provides common knowledge regarding fintech but also explicates the perceptual gaps among stakeholders. Findings of the study offer a big picture of current fintech initiatives, which can be useful knowledge for future research on fintech.

• 에너지공학
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• 제5권2호
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• pp.146-152
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• 1996

열출력 108MW$_{th}$ 급의 소형 원자로심을 설계하였다. 설계 제한 조건으로 2년의 재장전 주기, 무붕산 운전, 저출력 밀도를 채택하였고, 핵연료의 설계는 울진 3 & 4호기의 핵연료집합체 사양을 그대로 채택하였다. 노심 출력준위 제어는 제어봉만으로 가능하도록 하였으며, CASMO-3와 KINS-3를 통해 설계된 초기노심이 주기길이, 첨두계수, 감속재 온도계수, 출력계수 등의 설계 한계치를 만족하는지 확인하였다. 설계 결과, 한국형 표준원전 핵연료집합체를 장전하는 유조선급의 선박용 소형원자로를 무붕산 운전 조건으로 설계 가능함을 알 수 있었다. 단 가연성 독봉을 축방향으로 농축도를 달리하여 장전할 필요가 있으며, 독봉과 제어봉을 설계 한계까지 사용하여야 함을 알았다. 충분한 정지 반응도를 얻기위해 3개의 제어봉군 이외에 추가적인 정지제어봉군이 노심 외곽에 배치되는 안이 제기되었다.

• 대한지리학회지
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• 제42권3호
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• pp.421-433
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• 2007

대도시권은 인구나 경제활동이 주변지역으로 재배치됨에 따라 주변지역에서 새로운 중심지가 형성되는 패턴으로 변화하고 있다. 중심도시와 주변지역의 중심성 변화는 대도시권에서 발생하는 공간상호작용의 패턴을 변화시킨다. 본고에서는 서울대도시권의 통근통학통행을 통하여 공간상호작용의 변화 패턴을 고찰하였다. 서울과 접한 지역에서는 역외통행의 비중이 감소하고 있는 반면, 서울로부터 거리가 먼 지역에서는 역외통행의 비중이 증가하고 있다. 그리고 시간이 흐름에 따라 역외로 유출되는 최대통행의 목적지 분포가 점차 다원화하고 있으며, 서울 주변지역에서 서울을 목적지로 하는 역외통행률 또한 감소추세를 나타내었다. 서울대 도시권의 상호작용 변화는 대체로 인접한 지역들간에 강하게 이루어졌으며, 중심도시인 서울에서 유출되는 역외통행의 변화가 현저하였다. 통행량의 증감에 따른 상호작용변화의 유사성 분석에서는 용인 서울 수원 화성 등지가 상호작용변화의 속성을 뚜렷하게 보여주었다.

• International Journal of Fluid Machinery and Systems
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• 제5권2호
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• pp.49-59
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• 2012

The present study is devoted to the influence of a superposed radial inflow in a rotor-stator cavity with a peripheral opening. The flow regime is turbulent, the two boundary layers being separated by a core region. An original theoretical solution is obtained for the core region, explaining the reason why a weak radial inflow has no major influence near the periphery of the cavity but strongly affects the flow behavior near the axis. The validity of the theory is tested with the help of a new set of experimental data including the radial and tangential mean velocity components, as well as three components of the Reynolds stress tensor measured by hot-wire anemometry. The theoretical results are also in good agreement with numerical results obtained with the Fluent code and experimental data from the literature.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2006년도 추계 학술대회논문집
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• pp.7-8
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• 2006

The governing equations for high-speed lateral atomizing injector nozzle flow based on the LES-VOF model in conjunction with the CSF model are presented, and then an integrated parallel computation are performed to clarify the detailed atomization process of a high speed nozzle flow and to acquire data which is difficult to confirm by experiment such as atomization length, liquid core shapes, droplets size distributions, spray angle and droplets velocity profiles. According to the present analysis, it is found that the atomization rate and the droplets-gas two-phase flow characteristics are controlled by the turbulence perturbation upstream of the injector nozzle, hydrodynamic instabilities at the gas-liquid interface, shear stresses between liquid core and periphery of the jet. Furthermore, stable and a high-resolution computation can be attained in the high density ratio (pl/ pg = 554) conditions conditions by using our numerical method.