• Proceedings of the Optical Society of Korea Conference
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• 2003.02a
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• pp.134-135
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• 2003

인체안의 단색수차는 시력의 한계를 규정하고 또한 안광학 기기의 설계에 있어서 중요한 요소이기 때문에 오래 전부터 많은 관심을 갖게 되었다. 또한 단색수차를 정밀하게 측정함으로써 가장 이상적인 시력 교정 방법을 찾을 수 있다. 본 연구에서는 먼저 그림 1과 같은 Shack-Hartmann (SH) 파면분석기를 구성하였다. 이 파면분석기는 대물렌즈, 결상렌즈, 미소렌즈배열(microlens array, MLA), 그리고 이미지 센서(CCD)로 구성되어 있다. (중략)

• The Journal of Korean Institute of Communications and Information Sciences
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• v.26 no.7A
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• pp.1117-1123
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• 2001

본 논문에서는 국내 IMT-2000 이동통신 사업의 경제성을 분석한다. 투자비 산출을 위해 IMT-2000 망 구성요소를 추출하고 각 구성요소별 설비물량을 구한다. 이를 위해 IMT-2000 가입자의 기준트래픽 및 기지국의 용량을 수율(throughput)의 단위로 평가하여 기지국의 소요 물량을 산출하고 기존 2세대 이동통신 시스템의 종단용량을 기준으로 핵심망 부문의 설비물량을 구한다. 동기식 및 비동기식의 기술방식과 기존 시스템의 활용도를 고려하여 발생 가능한 시나리오를 설정하고 각 시나리오별 경제성을 비교, 분석한다. 그리고 시장 점유율 변화에 따른 순이익 변동을 평가한다.

• Proceedings of the KIEE Conference
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• 2004.11b
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• pp.208-210
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• 2004

기술의 비약적 발전에 따라 전기품질에 민감한 기기가 증가하고 있고, 비례하여 전기품질 저하에 따른 피해가 커지고 있다. 이러한 문제점을 해결하기 위해서는 공급자 뿐만 아니라 수요자 입장에서 문제점을 규명하고 해결책을 제시함으로서 각각의 이해관계에 따른 이러한 문제점을 해결할 수 있다. 본 논문에서는 전력품질 분석을 편리하게 수행하고 분석결과를 직관적으로 사용자에게 제공하기 위한 편리한 사용자 인터페이스 구성을 제공한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.173-176
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• 2004

영상압축 표준인 MPEG알고리즘은 다양한 분야에서 응용되고있다. 최근에는 기존의 아날로그 CCTV 영상 감시시스템 분야에서도 MPEG을 응용한 IP Surveillance 시스템으로 급속히 전환되고 있는 추세이다. 본 논문은 IP Surveillance를 위한 MPEG 알고리즘의 최적 Qp에 대해 분석하고 실제 전송구간에서의 지연과 품질에 대해 분석하였다. 네트워크를 통한 영상전송에서 QoS에 영향을 미치는 주요 요인으로는 압축된 영상데이터의 bit rate와 전송구간인 네트워크에서의 지연으로 인한 문제이다. 따라서 본 논문은 IP Surveillance를 위한 디지털 CCTV 네트워크를 구성하기 위한 방안을 MPEG 알고리즘과 전송부분에서 분석하고 효율적인 구성방안을 제시하였다.

• CRM연구
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• v.2 no.2
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• pp.53-70
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• 2009

Understanding consumer behavior based on the analysis of the customer data is one essential part of analytic CRM. To do this, the analytic skills for data extraction and data processing are required to users. As a user has various kinds of questions for the consumer data analysis, the user should use database language such as SQL. However, for the firm's user, to generate SQL statements is not easy because the accuracy of the query result is hugely influenced by the knowledge of work-site operation and the firm's database. This paper proposes a natural language based database search framework finding relevant database elements. Specifically, we describe how our TableRank method can understand the user's natural query language and provide proper relations and attributes of data records to the user. Through several experiments, it is supported that the TableRank provides accurate database elements related to the user's natural query. We also show that the close distance among relations in the database represents the high data connectivity which guarantees matching with a search query from a user.

• Journal of The Korean Association For Science Education
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• v.33 no.4
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• pp.840-862
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• 2013

This study undertook a methodological investigation on previous research that had proposed alternative methods for analyzing argumentative discourse in science classes in terms of collaborative construction and epistemic enactments of argumentation. The study also proposed a new way of analyzing argumentation discourse based on the achievements and limitations of previous research. The new method was applied to actual argumentation discourse episodes to examine its feasibility. For these purposes, we chose the studies employing Toulmin's argument layout, seeking for a method to analyze comprehensively the structure, content, and justification of arguments, or emphasizing evidence-based reasoning processes of argumentation discourse. In addition, we contrived an alternative method of analyzing argumentative discourse, Discourse Register on the Evidence-Explanation Continuum (DREEC), and applied DREEC to an argumentative discourse episode that occurred in an actual science classroom. The advanced methods of analyzing argumentative discourse used in previous research usually examined argument structure by the presence and absence of the elements of Toulmin's argument layout or its extension. Those methods, however, had some problems in describing and comparing the quality of argumentation based on the justification and epistemic enactments of the arguments, while they could analyze and compare argumentative discourse quantitatively. Also, those methods had limitations on showing participants' collaborative construction during the argumentative discourse. In contrast, DREEC could describe collaborative construction through the relationships between THEMEs and RHEMEs and the links of data, evidence, pattern, and explanation in the discourse, as well as the justification of arguments based on the flow of epistemic enactments of the argumentative discourse.

• Management & Information Systems Review
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• v.33 no.1
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• pp.1-16
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• 2014

This study examines the relationships among psychological capital, job satisfaction and organizational commitment based on survey data from employees of social enterprises in Busan & Ulsan Region area. The main findings of the study are as follows: first, psychological capital of social enterprise's employee was positively associated with job satisfaction and organizational commitment while there was also a positive relationship between job satisfaction and organizational commitment of social enterprises. Second, empirical analysis also shows that job satisfaction mediated both the relationship of psychological capital and organizational commitment of social enterprises. This study contributes to our understanding of relationship between psychological capital/job satisfaction and organizational commitment of social enterprises by suggesting an empirical study, highlighting the role of psychological capital, job satisfaction and organizational commitment of social enterprise's employees.

• School Mathematics
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• v.9 no.3
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• pp.375-396
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• 2007

The purpose of this study is to analyze how a mathematics teacher and a high school student make the meaning in a graph and how aspects of the interpretation of a graph are interacted during the signification process, and to suggest considerations for teaching and learning of a graph. The findings of a case study have led to conclusions as follows: All of them have a difficulty in making the meaning in a graph and construct the meaning as a nested signification model. In the process which they make the meaning, they interrelate cognitive, contextual, and affective aspects and construct interpretants. In this process, a teacher focuses on cognitive aspect, based on a qualitative approach. But a student considers contextual aspect more, based on a quantitative approach. This study suggests three considerations for teaching and learning of a graph.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.450-458
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• 2013

This study aims to suggest implications on hotel HR management through the research on the influence relation with voluntary behaviors that increase the effectiveness of work functions and also hotel employee' perceived followership contributing to achievement of hotel's goals. As study methods to achieve the study objective suggested above, we aim to conduct literature research and empirical study. The data are analyzed by such frequency analysis, validity analysis, reliability analysis, correlation analysis, confirmatory factor analysis, covariance structure analysis. The SPSS 10.1 and AMOS 4.0 for Windows program was used to investigate material. The major finding can be summarized as follow: The analysis on relationship between followership and revealed that 'critical thinking' and 'enthusiasm' dimensions of but 'active participation' dimension of followership has not affected service orientation. The expected effects through this study are like below. First, it is expected that the theory about followership will be extended by verifying the causal relation between followership and internal mental state. Second, it is also expected to be able to suggest alternatives for qualitative improvement of service and emphasis of the importance of hotel employee'.

• Journal of Korean Library and Information Science Society
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• v.47 no.3
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• pp.95-114
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• 2016

The purpose of this preliminary study is to collect specific examples of book reports and understand semantic characteristics of them through semantic network. The analysis was conducted with 23 book reports which classified by three groups. The keywords were selected from the of book reports. Five types of keyword network were composed based on co-occurrence relations with keywords. The result of this study is following these. First, each keyword network of book reports of groups and individuals is shown to have different structural characteristics. Second, each network has different high centrality keywords according to the result analysis of 3 types of centrality(degree centrality, closeness centrality, betweenness centrality). These characteristic means that keyword network analysis is useful in recognizing the characteristics of not only groups' and but also individual's book reports.