• Journal of the Korean Society of Safety
• /
• v.11 no.1
• /
• pp.27-38
• /
• 1996

The aim of this paper is to develop more fast algorithm for evaluation of the reliability of networks and system. It is illustrated with examples. This paper derived the algorithm to calculate the acyclic directed graph G(deals with the problem of the s-t graph). The language PASCAL was used to implement the algorithm. Three Examples are calculated and the calculation time is shorter than the time by program in $\ulcorner$21$\lrcorner.

• Journal of Information Management
• /
• v.22 no.2
• /
• pp.1-28
• /
• 1991

The objective of this study is to prepare a source data in order to establish a standardization of scientific and technical terms in Korean language. This will contribute to accelerate the production of Korean databases in scientific and technical field and will be used as the most convenient search tool for accessing to the foreign database. This study includes the construction of the multi-lingual thesaurus comprising of Korean, English, and Japanese. First of all a theoretical background on thesaurus is reviewed, and terms are collected from JICST Thesaurus, English-Japanese List and JICST Thesaurus, Japanese-English List published by JICST in 1987. This multi-lingual thesaurus covers 38,318 terms of Korean descriptors, 2,870 terms of Korean non-descriptors, 38,318 terms of English descriptors, 11,910 terms of English non-descriptors, and 38,318 terms of Japanese descriptors, 9,789 terms of Japanese non-descriptors.

• Journal of Information Processing Systems
• /
• v.13 no.4
• /
• pp.778-804
• /
• 2017

Software today has become an inseparable part of our life. In order to achieve the ever demanding needs of customers, it has to rapidly evolve and include a number of changes. In this paper, our aim is to study the relationship of object oriented metrics with change proneness attribute of a class. Prediction models based on this study can help us in identifying change prone classes of a software. We can then focus our efforts on these change prone classes during testing to yield a better quality software. Previously, researchers have used statistical methods for predicting change prone classes. But machine learning methods are rarely used for identification of change prone classes. In our study, we evaluate and compare the performances of ten machine learning methods with the statistical method. This evaluation is based on two open source software systems developed in Java language. We also validated the developed prediction models using other software data set in the same domain (3D modelling). The performance of the predicted models was evaluated using receiver operating characteristic analysis. The results indicate that the machine learning methods are at par with the statistical method for prediction of change prone classes. Another analysis showed that the models constructed for a software can also be used to predict change prone nature of classes of another software in the same domain. This study would help developers in performing effective regression testing at low cost and effort. It will also help the developers to design an effective model that results in less change prone classes, hence better maintenance.

• Journal of Korean Ophthalmic Optics Society
• /
• v.13 no.4
• /
• pp.13-17
• /
• 2008

Purpose: Study the method to attach to traditional pattern for the demands of eyeglasses' function which is becoming extended to cultural psychological and social aspects. Methods: To understand the symbolic characteristic of traditional pattern, especially through using palmette, embroidery, and practicing it on glasses' temple and cleaner. Results: Globalization stimulates crossing-consumption cultural trend rapidly. Thus, new glasses pattern involving Korean ethnic feature is a new source that could well adapt to this tendency. This report presents new aspect which corresponds to the demand of modern consumers. By modernizing Traditional pattern and method, we could discover the cultural value of glasses design. Conclusions: Glasses imply social position of users and became a measure that reveal a part of style that presents modern psychological language. Thus, the glasses design using traditional pattern makes a chance to change the beauty sense from western style to oriental one. And it achieves the desire of cultural consumption through glasses design.

• Journal of KIISE:Software and Applications
• /
• v.27 no.8
• /
• pp.886-901
• /
• 2000

Verification of the safety of untrusted codes becomes an important issue in the mobile computing environment and the safety-critical software systems. Recently, it is very common to run the codes attached to the electronic mails or downloaded from the web browsers. We propose the verification method of the machine code property. The code producer delivers the machine code and its property, then the code consumer checks whether the delivered code satisfies the delivered property. The safety of source codes is verified by the well-defined compiler systems but the verification mechanism for machine codes is not well defined yet. We design an intermediate language etySECK and propose the verification method of the property of etySECK programs. And then we prove the soundness of our system which is the type system with effect extension.

• Geomechanics and Engineering
• /
• v.14 no.2
• /
• pp.141-149
• /
• 2018

In this paper, the creep behavior of bolted rock was analyzed by using the unconfined creep tests and the numerical results. Based on the test results, the Bolted Burgers creep model (B-B model) was proposed to clarify the creep mechanism of rock mass due to rock bolts. As to the simulation of the creep behaviour of bolted rock, a new user-defined incremental iterative format of the B-B model was established and the open-source $FLAC^{3D}$ code was written by using the object-oriented language (C++). To check the reliability of the present B-B creep constitutive model program, a numerical model of a tunnel with buried depth of 1000 m was established to analyze the creep response of the tunnel with the B-B model support, the non-support and the bolt element support. The simulation results show that the present B-B model is consistent with the calculated results of the inherent bolt element in $FLAC^{3D}$, and the convergence deformation can be more effectively controlled when the proposed B-B model is used in the $FLAC^{3D}$ software. The big advantage of the present B-B creep model secondarily developed in the $FLAC^{3D}$ software is the high computational efficiency.

• Education of Primary School Mathematics
• /
• v.22 no.4
• /
• pp.223-237
• /
• 2019

There is a close interaction between the linguistic-syntactic representation system and the affective representation system that appear in the mathematical process. On the other hand, since the mathematical conceptual system is fundamentally metaphoric, the analysis of the mathematical concept structure through linguistic representation can help to identify the source of cognitive and affective obstacles that interfere with mathematics learning. In this study, we analyzed the problem-solving protocols of mathematical gifted children from the perspective of cognitive language and meta-affect to identify the relationship between the functional characteristics of the text and metaphor they use and the functional characteristics of meta-affect. As a result, the behavior of the cognitive and affective characteristics of mathematically gifted children differed according to the success of problem solving. In the case of unsuccessful problem-solving, the use of metaphor as an internal representation system was relatively more frequent than in the successful case. In addition, while the cognitive linguistic aspects of metaphors play an important role in problem-solving, meta-affective attributes are closely related to the external representation of metaphors.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2017.05a
• /
• pp.467-467
• /
• 2017

토양수분 및 황사발생 연구에 있어 효율적인 광역 분석을 위하여 위성자료가 활용되고 있다. 활용 시나리오에 따라서는 준실시간 자료 수신, 처리가 필요하며 본 연구에서는 이에 대한 방안을 연구하기 위하여 유럽 EUMETSAT(European Organisation for the Exploitation of Meteorological Satellites)의 ASCAT(Advanced Scatterometer) Metop-A 자료에 대하여 파악하였다. 자료 수신 프로토콜에 있어서 FTP, HTTP 등 전통적 방법에 대한 현황과 함께 비교적 최근 기법인 OGC(Open Geospatial Consortium)　 WMS(Web Map Service), WCS(Web Coverage Service) 방식의 지원 현황에 대하여 확인하였다. 제공되는 자료 Format부분은 EPS Native와 BUFR(Binary Universal Form for the Representation of meteorological data)을 살펴보되 데이터 프로바이더 측에서 대부분 채택되고 있는 NetCDF(network Common Data Form)를 중심으로 파악하였다. 수신된 자료의 처리 자동화를 위한 소프트웨어는 OSGeo(The Open Source Geospatial Foundation)의 GDAL(Geospatial Data Abstraction Library), 미국 NCAR(National Center for Atmospheric Research)의 NCL(NCAR Command Language)을 중심으로 확인하였다. 자료 가공기법은 격자(Raster) 자료에 대한 기본 메타정보 확인, 좌표참조체계 변환, 해상도 및 Format 변환을 중심으로 확인하였다. 한편 OGC WMS, WCS는 자료의 전송 프로토콜 기법이면서 동시에 서버 사이드에서의 자료 변환 기능을 구비하고 있다. 예를 들어 Http Request에서 영역(Extent), Format 형식, 좌표참조체계를 지정할 수 있다. OGC WMS에 대한 EUMETSAT 파일럿 서비스에서 반환 자료의 공간적 영역, 복수 시점 제공 현황, 반환 포맷 지원 상황은 실제 메서드를 사용하여 파악하였고, 향후 발전 방향을 전망하였다.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.23 no.9
• /
• pp.1160-1172
• /
• 2019

Federated authentication is a user authentication and authorization infrastructure that spans multiple security domains. Many overseas Web applications have been adopting SAML-based federated authentication. However, in Korea, it is difficult to apply the authentication because of the high market share of a specific Web (application) server, which is hard to use open-source SAML software and the high adoption of Java-based standard framework which is not easy to integrate with SAML library. This paper proposes the SAML4J, which is developed in order to have Web applications easily and safely integrated with the Java-based framework. SAML4J has a developer-friendly advantage of using a session storage independent of the framework and processing Web SSO flows through simple API. We evaluate the functionality, performance, and security of the SAML4J to demonstrate the high feasibility of it.

• Journal of Sasang Constitutional Medicine
• /
• v.31 no.1
• /
• pp.13-25
• /
• 2019

Objectives Lee Je-Ma's Sasang-philosophy that was discussed in Donguisusebowon is Maeumron and Qi-philosophy. Sasang-philosophy has a direct origin to Mencius, which discusses the Maeumron of Confucianism. Therefore the relationship between Maeumron of Donguisusebowon and Mencius Chapter 3 will be examined. Methods Materials and references were collected about the literature survey. Lee Je-Ma's books such as Donguisusebowon, Gyeokchigo and a book of Confucianism including the Mencius. Results and Conclusions Hoyeonjiqi in 'Sadanron' of Donguisusebowon encompasses the Qi of metaphysical personality and physiological Qi, and it can be seen that it is the Qi that fuses body and mind together. Benevolence, righteousness, propriety and wisdom are directly linked to the personal mind of Sasangin. Unlike the mencius's four clues of virtue, the Sadan is discussed in terms of the large and small organs in four constitution such sa lungs, spleen, liver, and kidneys. Next, In the relationship between Taesim of 'Whoakchungron' and greed of Mencius, if discuss a relationships between 'I understand language' and Taesim, Deceptive speech connects with the dogmatism of Soeumin, Licentious speech connects with indulgence of Taeumin, Crooked speech connects with laziness of Soyangin and Evasive speech connects with selfishness of Taeyangin. Also in the relationship between taking delight gladness without real cause idleness arrogant and Taesim, taking Delight connects with the dogmatism of Soeumin, Gladness without real cause connects with selfishness of Taeyangin, Idleness connects with laziness of Soyangin, and Arrogant connects with indulgence of Taeumin. The next thing, people of Four types of 'Gwangjeseol' coincide with Mencius. Also Love benevolence and enjoy goodness, Envy benevolence and jealous talent in the 'Gwangjeseol' are able to find the source directly in Mencius.