• The Korean Journal of Applied Statistics
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• v.36 no.5
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• pp.399-413
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• 2023

Recently, monitoring and detecting anomalies in social networks have become an interesting research topic. In this study, we investigate the detection of abnormal changes in a network modeled by the DCSBM (degree corrected stochastic block model), which reflects the propensity of both individuals and communities. To this end, we propose three methods for anomaly detection in the DCSBM networks: One method for monitoring the entire network, and two methods for dividing and monitoring the network in consideration of communities. To compare these anomaly detection methods, we design and perform simulations. The simulation results show that the method for monitoring networks divided by communities has good performance.

• Journal of the Korean Applied Science and Technology
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• v.36 no.1
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• pp.125-141
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• 2019

The purpose of this study was to examine the mediating effects of perceived social support and interpersonal competence on the effects of covert narcissism on nursing professionalism of nursing students. For this purpose, 375 nursing students from three colleges in J province were sampled for convenience. The result of this study were as follows: First, the fix indexed of causal model among covert narcissism, nursing professionalism, perceived social support and interpersonal competence were identified suitably. Second, covert narcissism of nursing students directly affected interpersonal competence and perceived social support, which was statistically significant. Third, interpersonal competence showed mediating effects in relationship between covert narcissism and nursing professionalism. Fourth, the interpersonal competence of nursing students directly affected perceived social support and nursing professionalism. Based on the results of the research, it is necessary to develop an intervention program that can enhance interpersonal competence in order to strengthen nursing professionalism of nursing students.

• Journal of Korean Library and Information Science Society
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• v.40 no.4
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• pp.81-92
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• 2009

I studied in this paper on the comparative study between the constructivism and the structuralism as the educational methods. On the constructivism in educational methods they say that knowledge is constructed subjectively by person individually(cognitive constructivism) or by persons reciprocally in the society(social constructivism). On the structuralism in educational methods they say that knowledge(structure) is in the closed-end text objectively and person pursue and identify this objective knowledge in the closed-end text. But on the post-structuralism(neostructuralism) they say that the text is not closed-ended but open-ended. So constructivism is consistent with post-structuralism. Education include application of knowledge and awareness of knowledge on my opinion. Education on application of knowledge is more important in this knowledge based society. Constructivism connote the application of knowledge in the education. School library media center and media specialist(teather-librarian) are essential elements of this application of knowledge in the education.

• Journal of the Korean Applied Science and Technology
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• v.38 no.3
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• pp.680-688
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• 2021

The purpose of this study was to investigate the effects of grit and social on college life adjustment of nursing students. The subjects of this study were 196 nursing students and data collection was from July 1 to August 13, 2020. Data was analyzed using the SPSS 22.0 program by descriptive statistics, pearson's correlation, multiple regression analysis. There was a positive correlation between college life adaptation and grit(r=.328, p<.001), social support(r=.334, p<.001). Grade, grit and social support were found to be factors influencing college life adaptation of nursing students. The results of this study suggest that it is necessary to develop some programs that include positive factors such as grit and social support for nursing students' adaptation to college life.

• Electronics and Telecommunications Trends
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• v.22 no.3 s.105
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• pp.67-79
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• 2007

최근 들어 인간 중심의 정보화 사회가 USN 기술의 발전과 더불어, 사물 간에도 정보들이 유기적으로 결합되고 활용될 수 있는 유비쿼터스 컴퓨팅 사회로 급격히 변모하고있다. 이러한 유비쿼터스 컴퓨팅 사회를 성공적으로 구축하기 위해서는 센서노드 하드웨어, 센서 네트워크, USN 미들웨어, 그리고 USN 응용 서비스 등의 USN 핵심기술의개발이 반드시 필요하게 된다. 본 논문에서는 USN 응용 시스템과 센서노드 하드웨어의 중간 부분에 위치하여, 이 둘 간의 유연한 통합을 지원할 수 있는 USN 미들웨어 기술에 대하여 자세히 소개하고자 한다. 먼저, Server-side 미들웨어와 In-network 미들웨어로 구성된 USN 미들웨어의 개념, USN 미들웨어가 제공해야 할 핵심기능들, 그리고 기존에 발표된 USN 미들웨어의 특징에 대하여 살펴보고, 이러한 USN 미들웨어의 특징을 반영하여 현재 ETRI에서 개발되고 있는 USN 미들웨어 플랫폼의 시스템 구성과 이를 활용한 응용 시스템에 대하여 간략히 살펴볼 것이다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.07a
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• pp.527-530
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• 2020

현재 대한민국에서는 게임 산업으로 벌어들이는 외화가 많고 게임 산업이 규모가 큼에도 게임 규제에 관련된 법안을 계속하여 발의, 채택하는 모습을 보이고 있다. 뉴스를 검색해 보아도 게임이 사회적으로 도움이 되거나 게임으로 긍정적인 효과를 보았다는 기사는 찾아보기 힘든 상황이다. 본 논문에서는 게임에 사용되는 기술들의 발전으로 게임의 역할이 늘어났던 기존 사례와 앞으로의 기술 발전으로 늘어갈 게임의 역할들을 분석, 제시하여 게임 산업이 가질 수 있는 큰 잠재능력과 발전 가능성을 정리하고자 한다.

• The Korean Journal of Applied Statistics
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• v.35 no.2
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• pp.299-310
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• 2022

As interest in social network analysis increases, researchers' interest in detecting changes in social networks is also increasing. Changes in social networks appear as structural changes in the network. Therefore, detecting a change in a social network is detecting a change in the structural characteristics of the network. A local change in a social network is a change that occurs in a part of the network. It usually occurs between close neighbors. The purpose of this paper is to propose a procedure to efficiently detect local changes occurring in the network. In this paper, we divide the network into partitioned networks and monitor each partitioned network to detect local changes more efficiently. By monitoring partitioned networks, we can detect local changes more quickly and obtain information about where the changes are occurring. Simulation studies show that the proposed method is efficient when the network size is small and the amount of change is small. In addition, under a fixed overall false alarm rate, when we partition the network into smaller sizes and monitor smaller partitioned networks, it detects local changes better.

• Ecology and Resilient Infrastructure
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• v.2 no.1
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• pp.12-21
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• 2015

Social demand for ecological engineering and technology has increased in tandem with national economic growth in order to improve the environmental capacity of civil infrastructures. To meet this demand, the Korean Society of Ecology and Infrastructure Engineering (KSEIE) was established in January 2013 and has contributed to the development of ecological engineering technologies. However, the establishment of an educational system for human resources training in ecological engineering is still at an early stage, and it is imperative to develop a curriculum for producing the human resources that can understand and apply ecological principles and functions and that is equipped with the abilities required for ecological conservation, restoration, and creation. As part effort, the KSEIE held a forum, entitled Founding the Education for Ecological Engineering, to discuss the establishment of the education system for ecological engineering in Korea. In this paper, based on the discussions and suggestions made during the forum, we analyzed the current status of ecological engineering education in various disciplines - civil and construction engineering, biology and environment, and landscape planning - in domestic universities, and attempted to seek possible solutions based on the cases of foreign universities. Generally, ecology and other application curricula are taught as fragmented subjects and fields in domestic universities. The development of new education strategies and systematic curricula for multidisciplinary education, ecological response to climate change, and the expansion of research fields is required.

• The Proceeding of the Korean Institute of Electromagnetic Engineering and Science
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• v.17 no.2 s.58
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• pp.3-8
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• 2006

주파수 자원은 국가의 소중한 무형 자산으로써 무선 통신의 발전과 함께 주파수 자원의 가치가 더욱 커지고 있다. 과거에는 석유, 철강, 가스 및 석탄등이 국가의 중요한 자원이었으나 21세기의 정보화 사회에서는 주파수 자원이 그에 못지 않게 소중한 자산으로 인식되고 있다. 우리나라의 무선 통신 기술은 아날로그 세대인 1980년대까지는 매우 제한적으로 사용되었으나 1990년대 CDMA(Code Division Multiple Access) 이동 통신의 상용화 이후 비약적으로 발전하여 현재는 유비쿼터스 정보화 사회를 눈앞에 두고 있다. 그런데 유비쿼터스 정보화 사회에서는 주파수자원의 수요가 공급에 비하여 매우 많기 때문에 주파수 부족 현상이 심각하게 대두된다. 그러나 실제로 분배된 주파수의 이용 효율을 측정해보면 이의 이용효율이 평균적으로 30% 이하로 나타나고 있다([그림 1] 참조). 따라서 이용되지 않고 있는 주파수 자원을 효율적으로 이용할 수 있는 공유 기술을 개발하여 이를 이용한다면 주파수 자원의 부족 현상을 해결하는데 크게 기여할 것이다. 본 고 에서는 이와 같이 분배된 자원 중에서 사용효율이 낮거나 사용되지 않는 주파수 자원의 이용효율을 획기적으로 높이기 위한 기술로서 최근 각광을 받고 있는 CR(Cognitive Radio) 기술의 동향 및 응용에 대하여 기술한다.

• Communications of Mathematical Education
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• v.22 no.4
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• pp.515-531
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• 2008

The visual cryptography scheme is a simple method which can be decoded directly the secret information in human visual system without performing any cryptographic computations. For some secret of image type, we scatter them to random n images and if any threshold (or more) of them are stacked together then original image is visible. In this paper we consider (2,n) visual cryptography scheme and show a construction method of the sample matrix using the rule of binomial coefficients $_nC_2$. This scheme can contribute interesting and effectiveness to the study of mathematics.