• Journal of the Korean Society of Industry Convergence
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• v.26 no.2_2
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• pp.341-347
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• 2023

The subway is one of the most common and important means of transportation in modern society. In order to use the subway safely, tracks are necessary, but trains are prone to derailment and collisions. In order for the train to run safely on the track, the fishplate that connects the line connection is used. The damaged railway was a fishplate for connecting subway lines used for 11 years, and damage analysis and countermeasures were presented. Beach marks were observed on both fracture surfaces, and striations appeared at the range of crack propagation. The damaged part is Cr carbide, which has a higher hardness than the base metal, and is judged to be embrittled and destroyed by fatigue. The SM50C fishplate was subjected to a cyclic stress of about 59% of the upper limit of tensile-compression fatigue limit, but inclusions were the cause of failure. In order to prevent fatigue failure of the SM50C steel fishplate, the occurrence of inclusions should be minimized and processed to have a homogeneous structure when manufacturing the fishplate. In addition, compressive residual stress is given through surface modification such as peening to control crack generation. It is necessary to minimize the change in shape that can become a stress concentration part along with accurate fastening of the bolt, and to design the stress distribution to be as uniform as possible.

• Architectural research
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• v.18 no.1
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• pp.21-29
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• 2016

Importance of FM has rapidly increased because of its growing business. However, due to lack of clarity and identity of FM in professional areas, standardization of FM became to be imperative in such a rapidly changing global business environment. Facility services are defined as the provision of support the primary activities of an organization, delivered by an internal or external provider. Majority of FM activities are services related to 'space and infrastructure' and 'people and organization' (CEN, 2011). The purpose of this study is to investigate definitions and characteristics of FM from both globally and domestic environment, by comparison with international or national standards, to identify quality management in FM and service characteristics of FM, to investigate the differences in service level elaboration in FM, and to suggest standard issues of quality management in FM service quality. This study examines contents of the European Standards in FM, Part 3 'Guidance on quality in Facility Management, especially for the process of QM standardized by CEN (2011) and explores undefined issues such as service level, measurement metrics according to service characteristics of FM. The European FM Standard guides the common process of QM in terms of requirements specification, service level elaboration, measurement metrics development although it does not specifically address various service levels, specific performance metrics and indicators.

• Journal of The Korean Digital Architecture Interior Association
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• v.11 no.2
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• pp.123-132
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• 2011

In Korea, special education for the gifted is being activated in school systems, and many researches regarding this special education are being conducted. However, despite its rich research on the programs of this special education, there are almost no research on the institutions layout and spatial design that can utilize them. Considering the heat for education of the present and the researches on education for the gifted so far, this tendency is likely to continue. To study space composition and interior architectural design of children's institution for the gifted, we studied the cases of 5 institutions located in Seoul and the following are the results. The research results are as followed. Most institutions for the gifted used most common and technical paint, wallpaper, and PVC for finishing materials. The colors should be carefully selected, too, so that it will increase inquisitiveness and interest of the children, which will develop into creative ability. In the cases studied, color of most walls and furnitures were not very distinctive: they were in light pastel and bright tone. And there were set of desks in many shapes so it can be put in different ways for different purposes. However, there were also desks that are commonly used at schools, which were limited in arranging in various ways. Most cases studied were located in general building and therefore, natural light source was limited. On the part of appliances, supplements should be made so that classes can be carried out using multimedia materials.

• Journal of the Korean Society of Clothing and Textiles
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• v.39 no.4
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• pp.477-491
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• 2015

This study analyzes Chinese dresses featured in propaganda posters since the mid-$20^{th}$ century as well as explores the political characteristics of dress. This study used an in-depth interview method to investigate information from 10 Chinese familiar with public awareness and donning practices of the Chinese from 1949 to present. Interviews and analysis provided the following conclusions. First, Zhongshan-zhuang, Liening-Zhuang and Bulaji were widely worn in the Reconstruction because of the revolutionary spirit; in addition, Huayishang also became simultaneously popular as a means to reflect the new aspects of socialism. Second, Jufu/Junbianfu were the most common dresses during the period of Cultural Revolution because the government used various mechanisms to control public opinion. Third, Western fashion began to enter the Chinese market and suit wearing by the Chinese became a symbol of the Reformation and Open-door policy. Traditional dress is no longer a symbol of Feudalism and is a part of Chinese culture that has been reaccepted in the Reformation and Open-door times. Finally, during these 60 years, Chinese dress has obvious political characteristics, but began to change. The changes of political characteristics were, de-politicization expressed by the introduction of Western ready-made, permissions for traditional dress and diversification/ individualization.

• Journal of Korea Multimedia Society
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• v.5 no.5
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• pp.562-570
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• 2002

In this paper, we design and implement web based Intranet Management Report Publisher (IMRP) that generates automatically daily, weekly, monthly and yearly report for configuration, performance and fault management of the Intranet. Intranet managers can analyze status of the Intranet with IMRP easier The IMRP publishes the Intranet management reports based on TINA (Telecommunication Information Networking Architecture) using CORBA(Common Object Request Broker Architecture). The advantages of this architecture are to protect the Intranet management system by being connected to the User Agent program and to raise the efficiency of maintenance by modifying only the User Agent program as accessing part of the Intranet management system is needed to change.

• Korean Journal of Computational Design and Engineering
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• v.10 no.3
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• pp.179-187
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• 2005

The usage of mixed 2D and 3D CAD data of commercial CAD systems is required in the construction practice. Sometimes 3D wireframe model is required by end-users when 2D CAD data is delivered. However, current KOSDIC can not represent 3D CAD data, because it has been developed as a 2D drawing delivery standard. Therefore, this study is to provide exchange and sharing of mixed 2D and 3D CAD data that add 3D wireframe model in the KOSDIC. To achieve this purpose, the authors have investigated the 3D CAD entities of commercial CAD systems, and have analyzed STEP standards providing 3D wireframe model. The result, the authors have extracted 3D CAD common entities based wireframe model which shall be added in the KOSDIC. This study can be beneficial by using the developed data model for heterogeneous CAD systems, and by providing the representation of mixed 2D and 3D CAD data in construction practice such as GIS, piping system, and so forth.

• Journal of KIISE:Computer Systems and Theory
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• v.26 no.9
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• pp.1055-1063
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• 1999

공개키 암호화 시스템에서 주된 연산은 512비트 이상의 큰 수에 의한 모듈러 지수 연산으로 표현되며, 이 연산은 내부적으로 모듈러 곱셈을 반복적으로 수행함으로써 계산된다. 본 논문에서는 Montgomery 알고리즘을 분석하여 right-to-left 방식의 모듈러 지수 연산에서 공통으로 계산 가능한 부분을 이용하여 모듈러 제곱과 모듈러 곱셈을 동시에 수행하는 선형 시스톨릭 어레이를 설계한다. 설계된 시스톨릭 어레이는 VLSI 칩과 같은 하드웨어로 구현함으로써 IC 카드나 smart 카드에 이용될 수 있다.Abstract The main operation of the public-key cryptographic system is represented the modular exponentiation containing 512 or more bits and computed by performing the repetitive modular multiplications. In this paper, we analyze Montgomery algorithm and design the linear systolic array for performing modular multiplication and modular squaring simultaneously using the computable part in common in right-to-left modular exponentiation. The systolic array presented in this paper could be designed on VLSI hardware and used in IC and smart card.

• Journal of the Korea Fashion and Costume Design Association
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• v.4 no.2
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• pp.163-172
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• 2002

There have been many unbalanced attempts to break the rules with Renaissance movement which connects with the past in the current art. And From the latter half of Twenty century to the early half of twenty one century, the common sense of fashion is turned over by(unthinkable fashion). To analyze current apparence of fashion, this research make a comparison of fashion condition between the sixteenth century and twenty century fashion, Three analysis methods is introduced. First of all, this paper make research of original language of mannerism and unthinkable apparence. Second, appearances of mannerism fashion and unthinkable fashion which are taken from reference books and pictures. Third, Gathering methods which express own style between two periods in the end part of research. As a result, Although Mannerism isn't practical for the visual and new pleasure, and neglect humanism of Renaissance, It is a tendency which is willing to change the flow of prevailing mode, and to reflect asking of people each periods. Mannerism and unthinkable fashion is apparence of society to refresh own feeling. And then, Mannerism and unthinkable fashion is a new challenge to escape from fixed thought.

• Journal of Information Technology Applications and Management
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• v.10 no.1
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• pp.127-146
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• 2003

With the spread of Internet, e-business using Internet technology is being actively developed and operated. Currently, on behalf of the international e-business framework, International standard such as ebXML and Web Service is being advanced. We are able to publish and search business information through ebXML and Web Service and then actual trading between partners is accomplished. By the way, it is Registry that play an important part in e-business. Registry is an e-business infrastructure for enabling building, deploying, and the discovery of business Information. We can do e-business through Registries dynamically and share the resources. Representatives of Registry are ebXML and UDDI used as an international standard. We will meet with some problems when using Registries. ebXML Is focused on B2B collaborations and Web Service Is focused on application integrations. So we must use ebXML and Web Service characteristically, and sometimes use all at need. ebXML and Web Service contain business information by Registry specific way. So When using the services offered by ebXML and Web Service, we should access each Registry by using Registry specific tools. This thesis intended to integrate business information from ebXML Registry and UDDI Registry to accomplish e-business conveniently This thesis defined the common data model as well as integrated query language for integrated access to ebXML and Web Service along with design and implementation of the system.

• Magazine of the Korean Society of Agricultural Engineers
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• v.30 no.4
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• pp.62-70
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• 1988

This study was conducted to solve the problems for the unsuitable parameters and the uncertainty of design flood can be appeared by low outliers were inclined to the lower part from the trend of the balance of the data. Derivation of reasonable design flood was attempted finally by modification of low outliers with analysis of flood frequency by means of Log Pearson Type Ill distribution. Three subwatersheds were selected as studying basins with the annual maximum series including low outliers along Geum River basin. The results through this study were analyzed and summarized as follows. 1. Log Pearson Type In distribution was confirmed as a reasonable one by X$^2$ goodness of fit test at Gong Ju, Gyu Am, og Cheon watershed along Geum River basin. 2. Probable flood flows for each watershed were derivated by flood frequency curve with outliers. 3. Weighted skew coefficient for each watershed was calculated for the evaluation of freq- uency factor which is needed for the modification of low outlier. 4. It was confirrned that adjusted frequency curve has a lower tendency than that of deletion of low outlier in common at all watersheds. 5. Final probable flood flows were derivated by modification with evaluation of modified basic statistics for three watersheds. 6. In comparison with a frequency curve with modification and one with outlier, The former has a higher probable flood flow within three years of return periods than that of the latter, and vice versa over three years of return periods.