• International Journal of Railway
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• v.2 no.2
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• pp.60-69
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• 2009

In recent years, technology developments in different countries, especially in newly industrialized countries, are extremely indebted to appropriate technology transfer by these countries. Nevertheless the technology transfer process in the present situation is complex, and its success is related to the coordination rate with the political, economic, social, and environmental objectives of countries. Today debates related to the transfer of the technical know how accompanied by equipment hardware has found remarkable importance such that countries seek increasing comprehensive capabilities in the field of transferred technology for which Preventive Maintenance (PM) is one of the aspects. This research with the purpose to determine the technological capability level and to study the role of PM in the effective & appropriate technology transfer in subway industry is carried out for presenting a suitable model for the technology transfer in this industry with an attitude towards the effects of principal PM factors. For this purpose, after the study of different and relevant models existing in the field of suitable methods for technology transfer, some equipment PM theories and models were selected as the base for the compilation of the questionnaire. With the help of questionnaire, main PM factors that are effective in the field of technology transfer were extracted, and finally, their effects on technology transfer were analyzed, identified and a comprehensive model suggested in this connection.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.823-825
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• 2005

자바는 이식성과 보안의 장점으로 인하여 내장형 시스템에서 널리 사용되고 있으나 인터프리터를 통한 바이트코드의 수행으로 인하여 성능이 저하되는 문제를 포함하고 있다. 이를 해결하기 위한 한 방법으로 수행시간 전에 바이트코드를 기계어 코드로 미리 번역하여 수행시간에는 기계어 코드가 수행되도록 하는 Ahead-of-Time 컴파일러 (AOTC)가 사용되고 있다. 특히 바이트코드를 C코드로 변환한 다음 기존의 컴파일러를 이용하여 기계어 코드를 생성하는 방식을 많이 택하고 있다. 본 논문에서는 AOTC에서 효율적인 예외처리 (exception handling) 기법을 제안한다. 기존의 AOTC 에서는 예외를 발생하는 메쏘드와 예외를 처리하는 메쏘드가 다른 경우 setjmp/longjmp를 이용하여 예외처리를 수행하고 있으나 우리는 메쏘드 호출 후의 예외 검사를 통해 예외처리를 수행한다. 우리는 제안된 예외처리 방법은 Sun의 CDC 가상 머신을 위해 개발된 AOTC 에 구현되었으며 SPECjvm98 벤치마크에서의 실험을 통해 setjmp/longjmp 방식에 비해 $1.3\%$에서 $154\%$까지의 성능향상이 가능함이 확인되었다.

• International Journal of Concrete Structures and Materials
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• v.6 no.2
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• pp.123-134
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• 2012

There is significant concern in the engineering community regarding the safety and effectiveness of fiber-reinforced polymer (FRP) strengthening of RC structures because of the potential for brittle debonding failures. In this paper, previous research programs conducted by other researchers were reviewed in terms of the debonding failure of FRP laminates externally attached to concrete. This review article also discusses the influences on bond strength and failure modes as well as the existing experimental research and developed equations. Based on the review, several important conclusions were re-emphasized, including the finding that the bond transfer strength is proportional to the concrete compressive strength; that there is a certain bond development length that has to be exceeded; and that thinner adhesive layers in fact lower the chances of a concrete-adhesive interface failure. It is also found that there exist uncertainty and inaccuracy in the available models when compared with the experimental data and inconsistency among the models. This demonstrates the need for continuing research and compilation of data on the topic of FRP's bond strength.

• Journal of Institute of Control, Robotics and Systems
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• v.3 no.2
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• pp.187-196
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• 1997

This paper presents a semi-automatic methodology to synthesize executable digital controller saftware in a multi-loop control system. A digital controller is described by a task graph and end-to-end timing requirements. A task graph denotes the software structure of the controller, and the end-to-end requirements establish timing relationships between external inputs and outputs. Our approach translates the end-to-end requirements into a set of task attributes such as task periods and deadlines using nonlinear optimization techniques. Such attributes are essential for control engineers to implement control programs and schedule them in a control system with limited resources. In current engineering practice, human programmers manually derive those attributes in an ad hoc manner: they often resort to radical over-sampling to safely guarantee the given timing requirements, and thus render the resultant system poorly utilized. After task-specific attributes are derived, the tasks are scheduled on a single CPU and the compiled kernel is synthesized. We illustrate this process with a non-trivial servo motor control system.

• Journal of Korea Spatial Information System Society
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• v.11 no.1
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• pp.97-104
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• 2009

GIS (Geographic Information System) is very useful in describing basin wide geographic characteristics and hydrologic analysis. This study estimated long term hydrologic variations in the Geum river basin using the SSARR rainfall runoff simulation model to provide reliable hydrologic information associated with rainfall runoff management module. Calibrated various hydrologic information such as soil moisture index, water use, direct and base flow are generated using GIS tools to display spatial hydrologic information in the unit of subbasin of target watershed. In addition, the graphic user interface toolkit designed for data compilation is expected to support efficient basin wide rainfall runoff analysis.

• Journal of the Korean Society for Library and Information Science
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• v.26
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• pp.113-139
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• 1994

Government archives are basic source materials in the historical study. Whereas, researches on the archives of Choson-chongdokbu have been very scant. Those archives contain information about both colonism of Japan and independent movement of Korea are comparatively well preserved at Government Archives and Record Services. Therefore, it is necessary to analyze the characteristic of archives and to evaluate the system of archival management of Choson-chongdokbu. Based on the official gazette and archives of Choson-chongdokbu, this study has revealed the division of archival work, the writing and treatment of official document, compilation and preservation, and the procedure of use and destruction. As a result of the research, the followings have been identified; 1. Archival regulations were prepared by the instructions of Choson­chongdokbu at the early days of its establishment. Inspite of several revisions, its basis was maintained until 1945. 2. Each agency had its own archival department instead of central archives. 3. The archival department of Choson-chongdokbu controlled the archival administration of headquarters and attached agencies. But the secret archives were managed by the secretarial department. 4. The writing and treatment of archives were done by the archival regulation made in 1911. 5. Each agency had set more or less different preservation period. 6. There were three ways of using archives, 1) the in-house reading 2) the loan 3) the transcriptions. The archives passed the preservation period were destroyed in accordance with the related departments.

• The Journal of Korean Medical History
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• v.23 no.1
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• pp.105-113
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• 2010

Seungjeongwon Ilgi["承政院日記"], the Diaries of Royal Secretariat of the Joeson Dynasty is the most massive compilation of records in Korean history. Medical records in Seungjeongwon Ilgi have been studied but the procedures of clinical discussion[議藥] have not yet been studied. In this paper, main agents of clinical discussion, formation of participant doctor system, particularity of clinical discussion in Royal Court and problems derived from it will be discussed. Main agents of clinical discussion were court doctors[內醫], royal doctors[御醫] and participant doctors[議藥同參]. The king himself decided ultimately as a matter of form. Head of the Medical Dpt. of the Palace[藥房都提調] was in charge of attending to king, but head of the court doctor[首醫] led the actual discussion of deciding treatment. The Medical Dpt. of the Palace[內醫院] was divided into three sectors-court doctor division, acupuncture doctor division and participant doctor division. Palace doctors payed a great attention to avoid serious error. This tendency led them occasionally to passive management. Sometimes aggressive treatment is needed in the course of treating disease, but palace doctors tended to choose slow and gradual methods. It induced minor conflict between palace doctors and participant doctors from outside palace, because doctors from outside palace subordinated effectiveness. Their opinion had not been always recognized by court doctors. However, their role was meaningful because they provided flexibility to the rigidity of clinical discussion in the palace. It is important to evaluate clinical records in Seungjeongwon Ilgi["承政院日記"]. If we have broader eye on the clinical procedure in the palace, we can estimate the value of the contents more objectively and accurately.

• Journal of Korea Port Economic Association
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• v.24 no.2
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• pp.113-129
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• 2008

Generally and also specifically in Busan the port and port related industries influence regional economy directly and indirectly. In the case of Busan the regional I-O model shows the port and port related industries account for more than one fifth of regional production, more than one fifth of value added and more than one seventh of employment at least. The port and port related industries are the most important sector in Busan economy as well as other major ports such as Rotterdam and Singapore. The impact estimation of port and port related industries is compared by the previously held survey study. The compilation of regional I-O table makes more diverse analysis on regional economic variables available and a few sample cases are reported in this paper.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.12 no.2
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• pp.125-140
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• 2001

As an attempt to grasp the current situation of traditional Korean books scattered about in the world, this study has bibliographically analyzed first of all traditional Korean books as well as old Korean maps and atlases, and topography descriptions collected by L. C.. Traditional Korean books have been analyzed classified by subject, printing or manuscript, and the kind of edition. Historical development in the compilation of geographical materials during the Chosun Dynasty has been studied. Especially on old Korean maps and atlases bibliographical characteristics have been researched. Accordingly. the foundation has been laid not only for the study on the bibliographical characteristics and the current situation of traditional Korean books and old Korean maps and atlases but also for the comparative analysis on traditional Korean books in Korea with the ones collected by L.C.

• Journal of Korean Library and Information Science Society
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• v.24
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• pp.365-389
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• 1996

This study attempts to analyze the major periodical indexes and catalogs of 231 titles published in Korea in the form of monographs from 1973 to 1993, in order to identify the trends of their publications and the problems in its compilation and to suggest an idea for the improvements. The results of this can be summarized as follow : 1. The publication of indexes are concentrated on some subject fields including those of social science. And there should be general indexes in the fields of the humanities and pure sciences for the researches in these fields to consult. 2. The titles of the indexes are represented by various forms. 3. The materials included are extended to all types of them including monographs, serials, these and dissertations, and newspapers, so that enhances the usefulness of the subject indexes. 4. Most of indexes are published in quarterly or yearly and seldom publish the cumulative editions. 5. Most of indexes(140 titles, 90%) are classified indexes. 6. The descriptions include basic elements of author, title, translator, contributed title, issue number, date, pages, etc, in the case of most of indexes. 7. Cross reference are seldom used, because most of indexes are classified ones. 8. Auxiliary indexes or a n.0, ppendixes are not included in 34 titles of 21%.