• Journal of the Korean Society for Library and Information Science
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• v.48 no.3
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• pp.55-70
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• 2014

Although a significant number of studies have been conducted in user-based relevance criteria, a need for further research still remains. The rational is associated with the following inadequacies: (1) research on young user groups, (2) research on the Web environment with multimedia resources, (3) research on the irrelevance criteria and implications to improve related systems and services. Accordingly, this study identified user - based relevance and irrelevance criteria, examining 40 middle school third grader students who use KERIS Edunet site. The results identified 16 relevance criteria and 8 irrelevance criteria. Major implications related to information system and service improvements.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.18 no.2
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• pp.89-105
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• 2007

The objective of this study lies in researching what kind of literature is mainly used by researchers in the related field by analyzing the research pattern of researchers who major in the same field of science. and to propose a list of literature that is indispensable for college libraries to prepare. Based on such analysis results of cited literature. this study is to propose necessary standards for selecting and reading journals in the field of Library and Information Science(LIS) in the libraries of Korean colleges where a LIS department is established.

• The Journal of Korean Institute of Next Generation Computing
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• v.13 no.6
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• pp.96-105
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• 2017

In this paper, we investigated the age classification from the speaker by analyzing the voice calls of the emergency center. We classified the adult and elderly from the call center calls using behavioral speech utterances and SVM(Support Vector Machine) which is a machine learning classifier. We selected two behavioral speech utterances through analysis of the call data from the emergency center: Silent Pause and Turn-taking latency. First, the criteria for age classification selected through analysis based on the behavioral speech utterances of the emergency call center and then it was significant(p <0.05) through statistical analysis. We analyzed 200 datasets (adult: 100, elderly: 100) by the 5 fold cross-validation using the SVM(Support Vector Machine) classifier. As a result, we achieved 70% accuracy using two behavioral speech utterances. It is higher accuracy than one behavioral speech utterance. These results can be suggested age classification as a new method which is used behavioral speech utterances and will be classified by combining acoustic information(MFCC) with new behavioral speech utterances of the real voice data in the further work. Furthermore, it will contribute to the development of the emergency situation judgment system related to the age classification.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.33 no.4
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• pp.207-228
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• 2022

This study compared the behavior of using the reading room of the university library before and after COVID-19 and confirmed the changes and characteristics. As a subject of the study, 579,555 reading room usage data for the 2019-2021 school year, three years before and after the outbreak of COVID-19, were collected and analyzed for reading room utilization. In addition, the purpose of visiting the library was compared based on 120,090 data usage logs, and the relationship between the characteristics and usage rate of each reading room was analyzed. Ultimately, it is intended to suggest a way to increase utilization by reflecting the needs of users derived from changes in usage behavior during the COVID-19 period in the reading room space of the university library. It is hoped that the results of this research will be used as basic data for the operation of library reading rooms and the establishment of space reconstruction policies to cope with the New normal era after pandemic.

• The Korean Journal of Applied Statistics
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• v.18 no.3
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• pp.555-565
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• 2005

To Know customers is very important for the company to survive in its cut-throat competition among coimpetitors. Companies need to manage the relationship with each ana every customer, ant make each of customers as profitable as possible. CRM (Customer relationship management) has emerged as a key solution for managing the profitable relationship. In order to achieve successful CRM customer segmentation is a essential component. Clustering as a data mining technique is very useful to build data-driven segmentation. This paper is concerned with building proper customer segmentation with introducing a credit card company case. Customer segmentation was built based only on transaction data which cattle from customer's activities. Two-step clustering approach which consists of k-means clustering and agglomerative clustering was applied for building a customer segmentation.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2087-2088
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• 2006

사람의 분석에 의존하는 침입 탐지 기법은 침입의 특징 중 일부를 간과하거나 잘못 파악하여 오류의 여지를 가진다. 이에 우리는 시스템의 행태에서 나타나는 정보들이 그 자체에서 발견되는 위험의 조짐이 침입 탐지의 근거가 되는 시스템을 설계하고자 한다. 본 논문에서는 이러한 시스템을 위해 시스템의 상태 정보 수집, 수집 정보를 바탕으로 한 상태 모형의 구성과 이것의 침입 탐지를 위한 활용 방법을 제안한다.

• Journal of Digital Contents Society
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• v.18 no.3
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• pp.499-508
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• 2017

With the recent advance of IT technology and the change of education paradigm, vocational training has been also evolved. In the background of mobilization of learning, increase of bite-size contents, and the agility of just-in-time learning, this study surveyed the online learners' motivation, perceptions, and learning behaviour. Total 4,021 learners from 6 distance learning institutions revealed that learners take the e-learning courses due to more for their self-development than the company's supports and policy. Also, they perceived the subject matter in contents are the most important. The results from this study suggest that the development of contents should focus on the subject matter that can be utilized for their jobs immediately. Lastly, the study confirms that learning space and time has been changed in the flexible way to use their spare time between work and life. Irregularity of learning and hasty preparations were one of major characteristics in the aspect of learning behaviour.

• Proceedings of the Korean Society for Information Management Conference
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• 2016.08a
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• pp.49-55
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• 2016

본 연구에서는 물리, 생명분야 연구자들의 인구사회학적 특성이 기관리포지터리 수용의도에 미치는 영향을 살펴보았다. 그리고 이를 정보공유와 확산의 장으로 기관리포지터리를 활용할 수 있는 전략 수립의 근거자료로 활용하고자 하였다. 관련 문헌자료 조사, 설문조사와 심층면담을 수행한 연구결과는 다음과 같다. 첫째, 기관리포지터리 인지경로는 도서관과 모체기관의 홍보, 동료들의 추천순으로 나타났다. 둘째, 연구자의 학술정보자원 공유는 면대면이 가장 높게 나타났으며, 그다음으로 오픈액세스 기반 기관리포지터리, 연구그룹단위 웹사이트 순이었다. 셋째, 학술정보자원 유형별 공개는 심사후 학술논문이 가장 높게 나타났으며, 실험데이터에 대한 공개의사는 매우 저조한 것으로 나타났다. 넷째, 학술정보자원의 공개를 통해 연구자들은 연구성과에 대한 인정, 우선권확보, 연구역량 강화에 대한 기대감, 취업에 대한 기대감, 중복연구 가능성 축소를 기대하고 있었다. 향후 다양한 학문분야별 연구자의 특성과 행태분석을 통해 주제분야별 특성이 반영된 기관리포지터리 개발이 필요할 것으로 보인다.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.4
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• pp.267-295
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• 2014

The purpose of this study is to analyze empirically relationships between learners' psychological factors, knowledge sourcing behavior and knowledge utilization outcomes and to analyze the mediation effect of social learning and relationships among learners. Another purpose is to understand learners' attitude on social learning and knowledge sourcing behavior. The main results of this study are as follows: First, regression results on relationships among learners' psychological factors, knowledge sourcing behavior, knowledge utilization outcomes show that learners' self-efficacy has a positive effect on social learning activity participation, and goal orientation has a positive influence on group knowledge sourcing and social learning activity participation. Users' experiences of social media has a positive effect on group knowledge sourcing, social learning activity participation and social learning interaction. From a knowledge utilization perspective, published knowledge sourcing positively affects knowledge reuse, knowledge application and knowledge innovation. Dyadic knowledge sourcing has positive influence on knowledge reuse. Group knowledge sourcing affects positively knowledge application and knowledge innovation. Second, social learning activity participation factor has full mediation effect on relationship between learners' goal orientation and group knowledge sourcing, and the relationship between users' experiences of social media and group knowledge sourcing. A relationship among members factor has full mediation effect on the relationship between published knowledge sourcing and knowledge reuse, and relationship between published knowledge sourcing and knowledge innovation. Third, the results of in-depth interview show that learners trust and easily collect knowledge from social network services in general. Also, they get a variety of idea for solving information problem from interaction among members in social learning community.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.22 no.2
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• pp.101-122
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• 2011

Information literacy(IL) is the essential skill in the knowledge information society in the 21st century. Spreading the awareness of importance of IL across the world, the efforts to develop and implement IL standards or instructions are expanded around United States, United Kingdom, and Australia. In this study, Author extracts the core elements of IL from domestic and foreign IL standards and integrates those with Kuhlthau's Information Search Process(ISP) Model in order to develop the curriculum model of IL for undergraduates. The curriculum model has been constructed by consideration of capability of application to practice and expressed as the syllabus for the structure of university education. In the curriculum model, major instructional contents are extracted from 6 core elements of IL and the contents are organized by 6 ISP stages. Author suggests some successive studies based on the curriculum model for expansion and advancement of IL instruction.