• 한국ITS학회 논문지
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• 제21권1호
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• pp.64-75
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• 2022

현재 ITS 성능평가는 교통정보 수집 장비에 대한 평가를 중심으로 시행하고 있다. 하지만 교통정보 수집 장비에 대한 평가만으로는 도로 이용자에게 제공되는 교통정보의 신뢰성을 보장할 수 없기 때문에 ITS 서비스를 평가할 수 있는 제도적인 뒷받침이 필요하다. 본 연구에서는 도로 이용자가 제공받는 구간 통행시간정보의 정확도를 평가할 수 있는 방법을 검토하였다. 그리고 실제 도로에서 데이터를 수집하기 위하여 이동식 평가 기준장비를 개발하였다. 개발한 평가 기준장비에 대한 성능평가와 현장 여건을 고려한 평가 방법을 마련하기 위해, 서울청 관할 국도 2개 구간에서 시범평가를 수행하였다. 평가 결과, 서울청에서 제공하는 통행시간정보는 90% 이상의 정확도로 높게 나타났다. 시범평가 결과를 바탕으로 표본 수를 늘리기 위한 기준장비 검지 방식 개선과 수집지점 위치 조정에 대한 사항을 논의하였다.

• Journal of Information Science Theory and Practice
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• 제7권3호
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• pp.52-64
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• 2019

This research was aimed at studying the situation, problems, and requirements for digital collection lifecycle management of Thai theses and dissertations. The mixed research method used was composed of: (1) Study of the problem and situation in which the qualitative method was applied. The research site covered 10 higher education institutions where the Thailand Digital Collection (TDC) project is operated. The informants were key administrative officers of the TDC project of each institution. In-depth and structured interviews were conducted on an individual basis to obtain the most accurate answers. (2) Study of requirements based on the quantitative research method to survey the requirements for the digital collection management system for Thai theses and dissertations from 84 purposively-selected TDC project officers and 527 end users selected by accidental sampling, totaling 611 samples. Research findings are as follow: (1) The study of the situation and problems of digital collection lifecycle management shows that Thai higher institutions systematically manage their digital collection. The management lifecycle is consistent with the Guidance documents for lifecycle management of ETDs, which included seven steps: program planning, creation, submission, and ingestion, access and retrieval of digital objects, archiving and preservation, evaluation and assessment, interoperation (creation of institutional collaboration), and development of link data. (2) The study of requirements for digital collection management of Thai theses and dissertations shows five system requirements: acquisition and gathering, digitization, metadata standards, management of rights, and storage and retrieval, all of which are at M (mandatory) and D (desirable) levels.

• Parasites, Hosts and Diseases
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• 제45권2호
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• pp.149-152
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• 2007

A cohort was established for evaluation of cancer risk factors in Sancheong-gun, Gyeongsangnam-do, Korea. As one of the cohort studies, stools of 947 residents (403 males and 544 females, age range: 29-86 years) were screened for Clonorchis sinensis eggs using both Kato-Katz method and formalin-ether sedimentation technique. The overall egg positive rate of C. sinensis was 37.7% and individual EPG (eggs per gram of feces) counts ranged from 24 to 28,800. Eight egg positive residents voluntarily joined a process of collection of the passed worms after praziquantel treatment. A total of 158 worms were recovered from 5 of the 8 treated persons, ranged from 3 to 108 in each individual. The worms were $15-20 mm{\times}2-3 mm$ in size, and showed brown-pigmented, red, or white body colors. This is the first collection record of C. sinensis adult worms from humans through anthelmintic treatment and purgation. The adult worms of C. sinensis may be paralyzed by praziquantel and then discharged passively through bile flow in the bile duct and by peristaltic movement of the bowel.

• 한국기록관리학회지
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• 제19권1호
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• pp.137-166
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• 2019

본 연구는 국가기록원에서 제공하는 기록정보콘텐츠 중 컬렉션 유형의 특성을 반영한 사용성 평가영역과 항목을 도출하고, 역사 전공자를 대상으로 '독립운동관련 판결문' 컬렉션의 사용성 평가를 진행하였다. 이를 통해 사용성 평가영역 및 항목이 전체 만족도에 미치는 영향 관계와 중요도를 파악하였다. 연구 결과 '인터페이스, 콘텐츠, 검색' 영역 순으로 전체 만족도에 긍정적인 영향을 미쳤으며 각 영역 별로 2개 평가항목이 유의미한 영향을 미치는 것으로 나타났다. 중요도는 '검색, 콘텐츠, 인터페이스' 순으로 나타났으며, 인터페이스 영역의 중요도가 비교적 더 낮게 나타났다. 이를 토대로 국가기록원 기록정보콘텐츠 컬렉션 유형의 사용성 개선 방향을 제시하였다.

• 정보처리학회논문지A
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• 제14A권3호
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• pp.173-184
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• 2007

가비지 컬렉션은 자바 가상 머신의 핵심적인 기능으로서 개발자들이 겪는 메모리 관리의 어려움을 줄여준다. 본 논문에서는 임베디드 자바 가상 머신을 위한 가비지 컬렉터인 GenGC와 GenRGC의 성능을 평가하고 분석한다. 성능 평가를 위하여 썬 마이크로시스템즈사에서 개발한 실제 임베디드 자바 가상 머신인 CVM을 플랫폼으로 사용하며, SpecJVM98을 벤치마크 프로그램 집합으로 사용한다. 첫째, GenGC와 GenRGC의 성능을 비교하기 위하여 힙의 크기 및 각 영역의 크기를 변화시키면서 가비지 컬렉션 수행 시간 및 지연 시간을 비교한다. 둘째, GenRGC의 성능을 보다 세밀하게 분석하기 위하여 힙의 구성 요소 중 블록과 프레임의 크기를 변화시키면서 가비지 컬렉션 수행 시간 및 지연 시간을 측정하여 분석한다. 셋째, GenRGC를 사용하기 위하여 필요한 저장 공간의 크기를 분석하고, GenRGC가 제한된 메모리를 가지는 임베디드 환경에서 적합하다는 것을 보인다. CVM은 가장 대표적인 임베디드 자바 가상 머신이므로, 이와 같은 성능 연구는 실제 응용 환경에서 가비지 컬렉터의 성능을 보다 정확히 예측할 수 있다는 점에서 큰 의미를 갖는다.

• 정보관리학회지
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• 제25권4호
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• pp.165-184
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• 2008

이 연구는 전자저널의 평가모형 개발에 관한 연구로서 전자저널의 개념 및 특징 파악, 평가모형 개발, 그리고 평가의 세 단계로 진행되었다. 평가모형은 전자저널의 양적측면과 질적측면을 종합적으로 고려할 수 있도록 개발되었으며, P대학교 도서관이 구독 중인 ScienceDirect 수록 저널 중 기계공학분야 저널을 대상으로 평가를 실시하였다. 평가결과 P대학교가 2000년부터 기계공학분야의 주요저널로서 선정 구독해온 22종의 저널 중 10종(45.5%)이 여전히 가치가 높은 것으로 나타났다. 22종의 기계공학분야 주요저널은 양적측면보다 질적측면에서 더 높은 점수를 받았다. 2000년 당시 패키지 형태로 서비스되기 시작하였던 77종의 기계공학분야 저널 중 14종이 종합평가 결과 주요저널로서 구독될 가치가 있는 것으로 나타났다. 결론적으로 지난 8년간 P대학교 연구자들이 이용해온 총 99종의 기계공학분야 저널의 중요도에 변화가 있었으며, 이는 연구진의 교체, 학계의 연구 동향 등이 반영된 결과로 해석할 수 있다.

• 한국철도학회논문집
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• 제8권4호
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• pp.342-347
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• 2005

The Korean High-Speed Train(HSR 350x) had been developed by through 'G7-R&D project' in 1996-2002, and has been testing and evaluating it's reliability on the high-speed line until now. A number of core equipments designed and developed by using domestic technologies were boarded on the HSR 350x. In order to verify the performance of HSR 350x and core equipments such as traction system, brake system and pantograph, sophisticated testing and evaluating procedures should be considered and applied. In this paper, the tested and analysed results about the dynamic characteristics of HSR 350x pantograph are introduced in a view point of the mean contact force and it's variation trend, criterion of current collection, and up-lifting of contact wire when the MSR 350x running up to 350 km/h. Through the test and evaluation, we verified that HSR 350x pantograph had an excellent current collection performance and good dynamic characteristics as it had been designed.

• 한국문헌정보학회지
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• 제8권
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• pp.183-207
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• 1981

Library standards have been the source of considerable controversy, whereas many problems are involved in developing stardard for university library collections. For evaluation purposes, standards should be precise, quantifiable and measurable. In the United States, however, standards for academic libraries are limited to qualitative statements and principles. Quantitative standards, when given, are ususally related to the number of population in the institution being served, or the prescribed quantitative objectives are often arbitrarily formulated by value judgements. The study in this paper attempts to explain the problems involved in developing quantitative standard for academic library collections. Two problems facing in the formulation of the optimal size of collection are identified. One is the theoretically faulty concept of adequacy of collection to meet the situations of diversity of university libraies, and the other is the difficulties in quantification and measurement, along with the lack of concept of adequacy of collection. However, quantification of adequate size of collection is proved to be useful on the pratical level, even though not valid theoretically. ACRL, Clapp/Jordan and Voigt developed formulas or models for setting the optimal size of a library collection for any particular university library. The main purpose of this study is the analysis of the above formulas. ACRL standard was drawn from obervation and analysis of statistcs in leading library collections. In academic field, this judgement appears to have been based on the assumption that a high-grade institution would be apt to have a good library collection. This study criticizes ACRL standard for its failure to include some determinants of measurements, and points out the limitations of the standard. In contrast. Clapp/Jordan developed a formula rather scientifically based upon bibliographical sources. This is similarly empirical but has the advantage of bringing into play the elements which make universities diverse in nature. Both ACRL and Clapp/Jordan formulas share two major defects. (1) the specific subject needs of the collection are not indiacted directly, and (2) percentage rate of growth is an indicator in measuring the potential utility of a collection. Thus both formulas failed to provide a basis for meaningful evaluation. Voigt further developed a model for determining acquisition rates for currently published materials based on bibliographic technique. Voigt model encourages experimentation with different programs and different allocations of input resources, designed to meet the needs of the library's particular population. Standard for university library collections can be formulated in terms of input(traditional indicator), or additionally, in terms of output(cost-effectiveness). Cost effectiveness is expressed as user satisfaction, ability to provide wanted materials within a reasonable time period. Thus simple quantitative method does not cover all the situations of diversity of university library collections, nor measures the effectiveness of collections. Valid standard could not be established without further research.

• 한국문헌정보학회지
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• 제15권
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• pp.175-195
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• 1988

Use studies of library collections have been conducted as a method of evaluating collections in a library. The main purpose of use studies is to evaluate the quality of a library collection in terms of extent and mode of its use. In addition to use studies, both quantitative and qualitative methods could be utilized in order to evaluate a library collection. However, the quantitative and qualitative collection evaluation methods are more concerned with the collection itself than with its use. Use studies have been conducted in large academic libraries for the following specific purposes: 1) They attempt to identify little used portion of collections that can be retired less accessible and less expensive storage area. 2) They try to identify core collections to satisfy some degree of circulation demands in the near future. 3) They try to identify use patterns of selected subject areas or type of books that can be used to adjusting collection development practices or fund allocations. 4) They try to assess the document delivery capability of a library to improve their availability. A number of methodologies employed for these specific purposes fall into four major categories; 1) circulation analysis method, 2) last circulation method, 3) relative use method, and 4) document delivery test. Each method is briefly reviewed with its limitations.

• 대한임베디드공학회논문지
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• 제12권3호
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• pp.149-157
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• 2017

In this paper, we propose BCMR (Block Classification with Monitor and Restriction) to ensure the isolation and to reduce the interference of blocks between a garbage collection and a wear leveling. The proposed BCMR monitors an endurance variation of blocks during the garbage collection and detects hot blocks by making a restriction condition based on this information. The proposal induces a block classification by its update frequency for the garbage collection and the wear leveling, so we will get a prolonged lifetime of NAND flash memory systems. In a performance evaluation, BCMR prolonged the lifetime of NAND flash memory systems by 3.95%, on average and reduced a standard deviation per block by 7.4%, on average.