• 한국도서관정보학회지
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• 제22권
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• pp.139-169
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• 1995

The purpose of this study is to analyze the search pattern and search outcome of the National Central Library OPAC users by measuring their success rates and identifying the factors of failure and the personal background which bring about the differences of the search outcome. Various methods have been used for the study. Personal interview was used to find the pattern of the search, observation method was used to investigate the search process and the failure factors, and a questionnaire was used to survey personal background of searchers. The data were collected during the period of 7 days from April 17, 1995 through April 23, 1995. The search of 1, 217 cases, sampling systematically 25% out of the whole users, were collected and analyzed for the study. The findings of the study can be summarized as follows : First, in regard to the pattern, known-item search(72.6%) was preferred to the subject search(27.4%) and in case of known-item search the access point used were in the order of title, author, title and author. Second, the overall success rate of known-item search was 50.3% and the success rates were in order of author and date, title, and author. The failure factors of known-item search were divided into users factor of 67% and the database factor of 33%, respectively. Third, in case of subject search, its overall success rate was 44.1% and the keyword was the major access point, and the average of precision ratio was very low. Fourth, the analysis of the personal background related to the search outcome has shown significant differences by sex, the experience of using OPAC, education level, and the frequency of using other information retrieval systems. Based on the results the following suggestions can be made to improve the search outcome : First, the system should be su n.0, pplemented online help function to assist users to overcome the failure during search. Second, user instruction in group or individual should be implemented for the users to understand the system.

• 융합보안논문지
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• 제20권2호
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• pp.123-135
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• 2020

2016년 알파고의 대국 이후, 여러 산업 분야에서 인공지능 적용에 대한 요구가 많아지고 있고 그와 관련된 연구가 활발하게 진행되고 있다. 군사 분야도 마찬가지 인데, 지금까지 인공지능이 적용된 무기체계가 없었기 때문에 그 구현에 대한 노력이 도전으로 작용하고 있다. 한편 알파고를 이긴 알파고 제로는 인공지능의 자기학습에 의한 데이터 기반 접근법이 기존의 사람에 의한 지식 기반 접근법보다 좋은 결과를 도출할 수 있다는 결과를 보여주었다. 본 논문에서는 이러한 점을 착안하여, 알파고 제로의 기반이 되는 강화학습을 함정전투체계 또는 전투관리체계에 적용하는 것을 제안한다. 이는 일정한 승률을 보이는 최적의 전술적 결과물이 사용자 즉, 함장과 작전요원에게 권고할 수 있도록 하는 인공지능 어플리케이션을 함정전투체계에 적용하는 방법이다. 이를 위해 전투성능에 관한 체계의 정의, 함정전투체계 설계 방안과 실 체계와의 Mapping, 훈련체계가 현 작전 수행에 원활히 적용될 수 있는 방안을 더불어 제시한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권12호
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• pp.5855-5877
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• 2017

In view of personal health and disease management based on cost effective healthcare services, there is a growing need for real-time monitoring services. The electrocardiogram (ECG) signal is one of the most important of health information and real-time monitoring of the ECG can provide an efficient way to cope with emergency situations, as well as assist in everyday health care. In this system, it is essential to continuously collect and transmit large amount of ECG data within a given time and provide maximum user convenience at the same time. When considering limited wireless capacity and unstable channel conditions, appropriate signal processing and transmission techniques such as compression are required. However, ISO/IEEE 11073 standards for interoperability between personal health devices cannot properly support compressed data transmission. Therefore, in the present study, the problems for handling compressed data are specified and new extended agent and manager are proposed to address the problems while maintaining compatibility with existing devices. Extended devices have two PM-stores enabling compression and a novel transmission scheme. A variety of compression techniques can be applied; in this paper, discrete cosine transformation (DCT) is used. And the priority of information after DCT compression enables new transmission techniques for performance improvement. The performance of the compressed signal and the original uncompressed signal transmitted over the noisy channel are compared in terms of percent root mean square difference (PRD) using our simulation results. Our transmission scheme shows a better performance and complies with 11073 standards.

• 한국문헌정보학회지
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• 제39권2호
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• pp.5-33
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• 2005

근래에 와서 성인과 아동에 비해 공공도서관서비스의 혜택을 제대로 누리지 못하고 있는 청소년 이용자 군에 대한 관심이 증가하고 있으며, 특히 아동에서부터 성인으로 성장해 가는 발달과정에 있는 청소년들을 위하여 청소년들의 독특한 정보요구에 맞추어 서비스하도록 강조하고 있다. 이를 위해 청소년들의 요구조사가 실시되고 사회적으로 심각한 청소년문제 해결을 위해 공공도서관의 역할이 중요시되고 있다. 이에 따라 도서관계에서는 청소년서비스에 필요한 지침, 권고사항, 매뉴얼 등 기본사항을 제시하여 청소년서비스 개선에 도움을 주고 있다. 본 논문은 국내 공공도서관에서도 청소년서비스의 중요성을 인식하고 보다 체계적으로 청소년서비스를 제공할 수 있도록 미 도서관계에서 제시한 청소년서비스에 관한 기본사항을 소개하고 있다.

• 한국정보컨버전스학회:학술대회논문집
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• 한국정보컨버전스학회 2008년도 International conference on information convergence
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• pp.135-140
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• 2008

Recently in the Mongolian wireless marketplace, many E-commerce companies have been making considerable investments in the technological development of M-commerce, taking competitive advantage of new business possibilities offered by Internet-based wireless technologies. In the Mongolian wireless marketplace, this new mobile environment opens the door for new and exciting market opportunities in mobile services and applications. In the near future, these companies will be looking toward M-commerce services as a supplemental source of revenue in the mobile marketplace. This paper examines the roles of M-commerce in the consumers' in order to promote the consumers' loyalty in the booming M-commerce. This paper contains theory that focuses on the basic concepts of the M-commerce environment, its wireless network technologies, and its applications infrastructure. Upon searching for references to assist us in establishing a market hypothesis, we discovered that few comprehensive studies on consumer perspective and behavior related to M-commerce services actually exist in the literature. In the area of M-commerce, many companies neglect the consumer perspective, concentrating only on technological factors only when formulating their market strategies. And, due to technological blindness, many companies were not able to succeed in end-user E-commerce services. Given that fact, this paper formulates a consumer-centric research model. In order to prove the research model, we chose the survey method which allows for the collection of large amounts of data from a sizeable population in a highly economical way. Through the survey, this paper defines consumer's attitudes towards M-commerce services by identifying potential Business-to-Commerce(B2C) applications and its primary target groups in terms of gender and age, and by investigating whether consumers recognize the value proposition of M-commerce applications and services. As shown in the data analysis and results, this research concludes that M-commerce development in Mongolia is still at its infancy, and that the implementation of M-commerce depends not only on technological progress, but also on consumer attitudes and their willingness to adopt M-commerce services. As well, other complex cross-cultural factors-socially, economically, culturally, et cetera-enter strongly into the equation.

• Journal of Astronomy and Space Sciences
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• 제14권1호
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• pp.166-178
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• 1997

위성의 수와 복잡도가 증가함에 따라서 다양한 고장이 생기는 경우를 예측하고 고장이 발생한 경우 이를 감지하여 신속히 감지하여 처리하는 노력의 필요성이 증가하게 된다. 현재는 위성 관제소의 전문요원들이 이러한 작업을 수행하고 있지만, 많은 부분이 일상적인 작업이므로 이러한 진단 작업을 자동화할 필요성이 있다. 즉, 일상적인 작업은 전문가시스템이 수행하고, 보다 복잡하고 고차원적인 문제는 전문요원이 해결하는 방식이 바람직하다. 이 논문에서는 이러한 노력의 일환으로 인공지능의 사례기반 방식을 도입한 위성 고장진단 전문가시스템을 구축하기 위한 방법론과 이에 따른 프로토타입 시스템을 설계하고 구현하였다. 사례기반 시스템은 과거의 사례를 기억하고 있는 사례베이스를 구축하고 고장의 증상이 발생한 경우에 이러한 사례베이스로부터 가장 근사한 경우를 인덱스하여 처리하는 기능을 가지고 있다. 이 논문은 이러한 기능을 가지는 사례기반 시스템의 구조와 활용방안에 대해서 서술하고자 한다.

• Journal of Radiation Protection and Research
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• 제41권4호
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• pp.424-435
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• 2016

Background: The International Commission on Radiological Protection (ICRP) recommendations and the Federal Guidance Report (FGR) published by the U.S. Environmental Protection Agency (EPA) have been widely applied worldwide in the fields of radiation protection and dose assessment. The dose conversion coefficients of the ICRP and FGR are widely used for assessing exposure doses. However, before the coefficients are used, the user must thoroughly understand the derivation process of the coefficients to ensure that they are used appropriately in the evaluation. Materials and Methods: The ICRP provides recommendations to regulatory and advisory agencies, mainly in the form of guidance on the fundamental principles on which appropriate radiological protection can be based. The FGR provides federal and state agencies with technical information to assist their implementation of radiation protection programs for the U.S. population. The system of radiation dose assessment and dose conversion coefficients in the ICRP and FGR is reviewed in this study. Results and Discussion: A thorough understanding of their background is essential for the proper use of dose conversion coefficients. The FGR dose assessment system was strongly influenced by the ICRP and the U.S. National Council on Radiation Protection and Measurements (NCRP), and is hence consistent with those recommendations. Moreover, the ICRP and FGR both used the scientific data reported by Biological Effects of Ionizing Radiation (BEIR) and United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) as their primary source of information. The difference between the ICRP and FGR lies in the fact that the ICRP utilized information regarding a population of diverse races, whereas the FGR utilized data on the American population, as its goal was to provide guidelines for radiological protection in the US. Conclusion: The contents of this study are expected to be utilized as basic research material in the areas of radiation protection and dose assessment.

• 디지털콘텐츠학회 논문지
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• 제16권5호
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• pp.757-766
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• 2015

최근 첨단기술의 발달과 모바일 인터넷의 사용 증대로 디지털 교과서 개발이 활발해지고 있다. 따라서 본 사례 연구는 2명의 영어 학습자와 교사가 어떻게 디지털 교과서를 통해 학습하고 교수하는지를 관찰과 인터뷰 기법을 통해 탐구했다. 연구 결과 영어 학습자와 교사는 간편하고 다양한 기능과 빠른 인터넷 기반의 디지털 교과서를 통해 교수-학습에 도움을 받은 것으로 나타났다. 그러나 디지털 교과서가 제공하는 많은 양의 정보가 오히려 학습자의 학습을 방해하고, 디지털 교과서를 사용하는데 있어서 교사와 학생 모두 기술적인 어려움을 겼었다고 지적했다. 더 효과적인 디지털 교과서 활용을 위해 영어 교사는 언어적 지식과 더불어 기술적 지식을 학습자에게 전달하고 학습자 주도 학습을 위한 가이드 역할을 수행해야 할 것이다.

• 대한전기학회논문지:전력기술부문A
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• 제54권4호
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• pp.185-192
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• 2005

This paper proposes a DRMS(Distribution Remote Management System) which can enhance highly the economics of automatic metering system and the power quality supplied to the electric customer improving the efficiency of the meter reading, voltage management and load management work by realizing the remote meter reading, the remote voltage management and the remote load management based on the ADWHM(Advanced Digital Watt Hour Meter). The DRMS is designed so that the voltage management and load management work in remote site can be processed by collecting the voltage pattern and current pattern as well as watt hour data from all ADWHMs one time every month regularly or from special ADWHMS several time irregularly, A new on-line voltage and load management strategy based on the ADWHM is designed by analyzing the existing voltage management and load management process. Also, DRMS is designed so that watt-hour data, voltage pattern data, load pattern data and power factor data can be collected selectively according to the selection of user to assist effectively the methodology. Remote management program and database of the DRMS are implemented based on Visual C++, MFC and database library of MS. Also, DRMS is designed so as to communicate with the ADWHM using RS232C-TCP/IP converter and ADSL. The effectiveness of the remote metering function is proven by collecting and analyzing the data after ADWHMs installed in any site. The developed strategy and program also is verified through the simulation of voltage management and load management.

• 정보학연구
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• 제1권1호
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• pp.173-188
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• 1998

최근 인터넷을 이용한 전자상거래가 점차 발전됨에 따라 고객의 서비스 구매에 따르는 전자 결제의 이용이 점차 늘어가고 있는 추세이다. 그러나 전자결제는 온라인상에서 이루어지는 활동이라는 점에서 많은 문제를 내포하고 있다. 온라인 신용카드와 전자화폐 그리고 전자수표로 대변되는 전자결제의 수단들은 흔히 해커라 불리어지는 전자상거래의 비주체들에 의하여 오용되어지고 그로 인해 많은 피해가 발생할 우려가 있다. 본 고에서는 전자상거래시의 대금결제 수단인 전자결제의 종류와 문제점에 대하여 알아보고 그러한 문제점을 극복할 수 있는 방법들에 대하여 제시해 본다.