• Journal of KIISE:Information Networking
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• v.34 no.2
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• pp.88-99
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• 2007

P2P systems are distributed data sharing systems, and each node in them plays the role of client as well as server. There are several studies using Distributed Hash Table, such as Chord, CAN, Tapestry, Pastry, but these systems don't consider the physical latency, therefore they have a weakness of difficulty to guarantee stable performance. To improve this problem, we present the TP2P system. This system is a self-organizing hierarchical overlay system and it uses Chord routing mechanism for lookup data. This system is organized by several subnets, each subnet is organized by physically close nodes, and global network organized by all nodes. In each subnet, one node finds a data, it saves in a node in the subnet, therefore it has higher probability to reduce physical lookup latency than Chord system. And each node has global information of some nodes in its subnet, and it is used to lookup data, therefore the number of hops decrease about 25% as well as the physical lookup latecy are reduced.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.43 no.5 s.311
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• pp.45-51
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• 2006

Recently, the IDS(Intrusion Detection System) using a video camera is an important part of the home security systems which start gaining popularity. However, the video intruder detection has not been widely used in the home surveillance systems due to its unreliable performance in the environment with abrupt illumination change. In this paper, we propose an effective moving edge extraction algerian from a sequence image. The proposed algorithm extracts edge segments from current image and eliminates the background edge segments by matching them with reference edge list, which is updated at every frame, to find the moving edge segments. The test results show that it can detect the contour of moving object in the noisy environment with abrupt illumination change.

• Journal of the Korea Convergence Society
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• v.8 no.5
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• pp.107-115
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• 2017

The purpose of this study was to investigate the factors affecting the creativity of nursing college students who should act as professional nurses in the future. In order to carry out this research, the data collected through structured questionnaires were analyzed for 209 nursing college students who were approved by the IRB of K University. The results of this study showed that the creativity and self-efficacy(r=.374, p<.001), thinking ability(r=.347, p<.001), and school environment perception(r=.246, p<.001) were found to be positively correlated. In addition, the factors influencing the creativity of nursing students were self-efficacy(${\beta}=0.249$, p=.001), thinking ability(${\beta}=0.152$, p=.043), school environment perception(${\beta}=0.188$, p=.005) and the explanatory power of these variables was 21.2%. In the future, it will be necessary to develop educational methods for creativity development of nursing college students.

• Survey Research
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• v.7 no.1
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• pp.1-28
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• 2006

The aim of this study is to develop a scale measuring satisfaction to ubiquitous services. Since the ubiquitous service is not vet implemented but under development, conventional scale construction methods are not directly applicable. In this study, the characteristics of items are studied by observing individual's responses after presenting a video clip describing virtual services. The constructs of ubiquitous service are defined based on those of information system and previous studies of ubiquitous services. Items were generated to reflect the constructs. In the first study, we found six factors (me-centeredness, attractiveness, usability, trust, accessibility, ownership) in the ubiquitous service scale by using exploratory and confirmatory factor analysis. Some items were dropped out that did not show good psychometric properties. In the second study, relationships among the constructs and satisfaction of the service was investigated by using structural equation models. An SEM analysis showed that these six constructs can predict the satisfaction about ubiquitous system, Practical implications and utility of this scale are discussed.

• The Journal of the Korea Contents Association
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• v.12 no.5
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• pp.213-226
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• 2012

The absence of empowerment has been offered as one explanation for the growing burnout of social worker. Numerous studies have linked empowerment to employee's behaviors and attitudes. The purpose of this study is to examine the effects of empowerment on the burnout and career commitment of social worker. For the research, empowerment was consisted of meaning, competence, self-determination and impact. And burnout was consisted of emotional exhaustion, depersonalization and feelings of inefficacy. This study was analyzed 265 social workers by survey. The results of this study are summarized as follows: Social Workers have high correlation to empowerment on the burnout(-) and career commitment(+). Especially, meaning and self-determination have a negative effects on the burnout and positive effects on the career commitment. This study finally discusses theoretical implications for future study and practical implications for empowerment strategies on the results.

• Journal of agricultural medicine and community health
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• v.25 no.2
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• pp.343-352
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• 2000

한국의 농촌 보건의료 문제를 해결 하기위하여 일차보건의료가 도입되었으며 일차보건의료에서 핵심적인 역할을 수행하고 있는 보건진료원의 활동을 분석하였다. 분석 목적은 보건진료원의 일반현황과 보건진료원 활동에 대한 구체적인 분석을 통하여 활동개선 방안을 제시하는데있다. 분석방법은 사회조사 방법을 적용하였으며 조사는 1998년 7월과 11월기간에 구조화된 설문지를 보건진료원 전원에게 송부하여 스스로 작성하게 하였다. 1880명의 보건진료원을 대상으로 설문지를 배포하였으며, 1663명의 응답자가 작성한 설문지가 최종분석되었으므로 분석율은 88.5%였다. 분석결과 보건진료원의 일반현황으로 광역사의 보건진료원 평균 연령은 39.7세이며 시지역 보건진료원의 연령이 군지역보다 높았으며 통계적으로도 유의한 차이가 있었다. 총근무기간도 시지역의 보건진료원의 12.4년-13.6년으로 농촌지역보다 걸었으며 통계적으로도 유의한 차이가 있었다. 보건진료원의 평균 관할 인구수는 901명이었다. 보건진료소 관할지역의 노인인구 및 만성질환자의 분포가 매우 높았다. 보건진료소로부터 민간의료기관이 위치한 거리는 시지역 (7.1-11.3km) 보다 농촌지역이 12.1km로서 지리적 접근성이 시지역보다 낫은 것으로 나타났다. 활동건수분석결과 월평균 가정방문수는 평균 47.8건, 일평균 내소자수는 14.1건 및 일평균 전화상담은 5.2건으로 나타났다. 연령별 활동수준은 40세이상이 4세 이하보다 월평균 가정방문수와 일평균 내소자수가 많았으며 통계적요로도 유의한 차이가 있었다. 경력이 많을수록 일평균가정 방문수 및 전화상담 건수가 많았으며 통계적으로 유의한 차이가 있었다. 근무조건에 대한 만족도는 80%정도로 높았다. 연구결과 보건진료원의 활동지역내 노인인구 및 만성질환자의 비율이 높고 민간의료기관의 지리적 접근성도 낮고, 관할인구규모가 적어서 인구규모를 늘리고 노인 및 만성질환자 건강관리 프로그램의 개발이 더욱 요구되며 농촌지역주민의 건강관리자로서 보건진료원의 활동을 강화할 필요가 있다.

• Journal of the Korean School Mathematics Society
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• v.18 no.3
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• pp.281-309
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• 2015

The purpose of this study is provides an implication of further teaching learning process by analyze the common and difference and characteristic of mathematical self-efficiency between three peer tutoring groups discourse in the mathematical teaching leaning process that use peer tutoring. To achieve this goal, three groups formed that consist of one peer tutor who received a first grade of mathematic achievement and one peer student. Peer student of each group is divided into high grade, middle grade, low grade of mathematic achievement. Then analyze the discourse in the exponential function problem solving process. Based on the results of study, this paper provides a concrete example of merit of peer tutoring on the peer tutor. Result of study also provides a practical help to make a peer tutoring group by considering a difference of grades between peer tutor and peer student. Because there is a possibility of mutual discourse on the tutoring group that consist of similar grades.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.7
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• pp.255-262
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• 2014

Our previous research[1] suggested object extraction and modeling method based on Fillmore's case grammar. This approach had not considered of use case extraction and method. To solve this problem, we adopt Fillmore's semantic method as linguistic approach into requirement engineering, which refine fillmore's case grammar for extracting and modeling use cases from customer requirements. This Refined mechanism includes the definition of a structured procedure and the representation of visual notations for 'case' modeling. This paper also proposes the use case decision matrix to identify use case size from extracted use cases based on goal oriented requirement engineering(GoRE), which related with the complexity of use case, and also prioritizes the use cases with this matrix. It demonstrates our proposal with the bank ATM system.

• School Mathematics
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• v.7 no.4
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• pp.403-425
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• 2005

The study aims to get real picture of primary mathematics education based on RME in the Netherlands focusing on number and operations strand by reflecting and analyzing the documents in relation to the primary school mathematics curriculum. In order to attain these purposes, the present paper describes the core goals for mathematics education, Dutch Pluspunt textbook series for the primary school, and a learning-teaching trajectory by TAL project which are determinants of the Dutch primary school mathematics curriculum. Under these reflections on the documents, it is analyzed what is the characteristics of number and operations strand in the Nether-lands as follows: counting numbers, contextualization, positioning, structuring, progressive algoritmization based on levels, estimation and insightful use of a calculator. Finally, discussing Points for improving our primary mathematics curriculum and textbook series development are described.

• Journal of the Korea Society of Computer and Information
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• v.25 no.8
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• pp.9-21
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• 2020

With the proliferation of RDF knowledge graphs(KGs), there arose a need of a standardized schema representation of the graph model for effective data interchangeability and interoperability. The need resulted in the development of SHACL specification to describe and validate RDF graph's structure by W3C. Relational databases(RDBs) are one of major sources for acquiring structured knowledge. The standard for automatic generation of RDF KGs from RDBs is R2RML, which is also developed by W3C. Since R2RML is designed to generate only RDF data graphs from RDBs, additional manual tasks are required to create the schemas for the graphs. In this paper we propose an approach to automatically generate SHACL schemas for RDF KGs populated by R2RML mappings. The key of our approach is that the SHACL shemas are built only from R2RML documents. We describe an implementation of our appraoch. Then, we show the validity of our approach with R2RML test cases designed by W3C.