• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.334-338
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• 2004

KTX has started commercial service from Seoul to Busan and Mokpo since April 1, 2004. The service line is composed of new-high speed line and conventional line. Before KTX is runs, the maximum operational speed on conventional line was 140km/h. In order to reduce the traveling time, operation speed of KTX must be increased on the conventional line. So, we performed test running with prototype HSR-350x and verification of safety was made in $10\%$ speed-up. Korean High Speed Train HSR-350x) was developed by G7 - R&D project. In this study, in safety aspect, several technical reviews are introduced and the possibility for reduction of traveling time is investigated on the conventional line by using HSR-350x.

• 한국정보통신학회논문지
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• 제19권9호
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• pp.2073-2080
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• 2015

온라인에서 제품을 고르고 실질적인 구매는 오프라인에서 이루어지는 역 쇼루밍이 급격히 늘고 있다. 역 쇼루밍이 늘고 있다는 것은 이미지와 설명을 기반으로 한 인터넷 쇼핑몰의 사용자 분석에 한계가 있음을 의미한다. 따라서 대형 온라인 쇼핑몰은 고객 맞춤형 쇼핑정보를 제공하고 있으나, 단순히 고객이 검색하거나 구매한 상품을 나열하여 제공하여 준다. 따라서 사용자의 다양한 요구를 분석하고 적용할 수 있는 온라인 쇼핑몰이 필요하다. 본 논문에서는 새로운 니즈분석 시스템을 제안한다. 제안된 시스템은 사용자 정의 모듈과 후기 분석 모듈로 구성되어 있다. 전자는 두 개의 상품을 지정하고 개인별 사용자 선호도를 수집하며, 후자는 저장된 데이터베이스 사전을 이용하여 구매 상품의 후기를 분석한다. 구현된 시스템은 개별 사용자의 요구를 충족하는 상품을 추천할 수 있음을 보였다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제46권5호
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• pp.358-360
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• 2020

The management of odontogenic keratocysts (OKC) remains a hotly debated topic in oral and maxillofacial surgery. Despite numerous studies and systematic reviews on treatment options, there is a lack of consensus and no accepted protocol on the management of OKC. Hence, the aim of this study was to briefly summarize all large systematic reviews in the literature on the management of OKC and formulate an evidence-based management protocol. Data from five large systematic reviews were combined to calculate the mean recurrence rate for each technique. Decompression followed by enucleation along with adjuvant methods such as application of Carnoy's solution and peripheral ostectomy can result in very low recurrence and is an acceptable first line treatment. The surgical approach should be determined by lesion size, patient age, proximity to vital structures, accessibility, soft tissue/cortical perforation, and if the lesion is recurrent.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2002년도 춘계학술대회 논문집
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• pp.234-241
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• 2002

In this study, a numerical method which assesses running stability of freight car loading 300m CWR and structural safety of conventional railway track when passing over curves and steel girder bridges is presented. Optimal speed of the freight car is suggest on the basis of numerical reviews for stability of derailment of the freight car and structural safety of track at weak points of the conventional line.

• 한국경영과학회지
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• 제27권1호
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• pp.75-94
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• 2002

The development of Information technologies huts contributed on-line training as one of important education methods. On-line training In firms, which is similar to e-learning or virtual education, provides trainees with more education opportunities in diverse ways. It has developed a range of innovative services with an one-stop solution of education within the electronic sector. Also under the on-line training environment, trainees can undertake customized training packages at anytime and any places. Moreover, information technology allows both the trainers and other trainees to be decoupled in any of the elements of time, place, and space. Two research questions are investigated : what are the determinants affecting the on-line training effectiveness and how those variables effect the two aspects of training effectiveness: learning performance and transfer performance. Based on the previous literature conducted on the traditional training environment, the determinants of training effectiveness are derived. light hypotheses are developed based on literature reviews and tested by questionnaires survey data. The collected data have been analyzed by LISREL. It is found that the relationship between individual, organizational and on-line sloe design variables and training effectiveness (learning and transfer) are significant. The contribution and limitations of this research are also discussed tilth future studies.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 추계학술대회 논문집
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• pp.269-274
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• 2008

The Seoul subway is acting the center of public transportation after the opening of the first line on August 15, 1974. and the subway line of the DC traction system is running and building to the ninth line. However, the main insulation parts used in overhead contact line are now imported from overseas products. Therefore, this paper considers domestic manufacture technology, supply easiness and economic effectiveness of insulation products and reviews the safety of support insulator used in rigid conductor line, stem insulator used in movable bracket and AC/DC different phase section insulator that localization development is necessary.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.1898-1903
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• 2010

The hold clamp which is for holding feeder distribution line in direct current can be lengthened its span of life by inserting insulators(EDPM rubber) through improving its function such as preventing damage from temperature change and electric corrosion. This paper reviews the development background, design, manufacture and performance assessment of the hold clamp inserting insulators to prevent circulating current.

• Asia Marketing Journal
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• 제10권2호
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• pp.125-151
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• 2008

기업과 소비자 간의 온라인 커뮤니케이션 활성화로 인하여 기업과 소비자 모두 제품에 대한 경험과 지식을 공유하는 온라인 고객 리뷰에 많은 관심을 기울이고 있다. 본 연구에서는 내용 분석법을 통해 온라인 소비자 리뷰들을 맥락단위로 분류하고 분류항목을 도출함으로써 채널(자사홈페이지/쇼핑몰), 제품속성(탐색재/경험재), 가격(고가/저가)에 따른 차이 분석을 시행하였다. 분류 항목의 도출은 ACSI 모델의 구성 항목들을 근간으로 실제 리뷰의 반복적 분류를 통해 이루어졌으며 총 3단계로 나누어졌다. 1단계에서는 일단 제품과 서비스로 분류하고, 2단계에서는 제품에 대해서 기능, 디자인, 가격, 구매동기, 제안/사용팁, 그리고 추천/재구매를, 그리고 서비스에 대해서 AS/업그레이드, 배송/기타제조사와 유통사 등 총 8개 분류 항목을 도출하였으며, 3단계에서는 실제 제품 리뷰 내용을 바탕으로 2단계 분류 항목의 세부항목으로 작성되었다. 분류 항목별 차이 분석 결과, 총 8개의 분류 항목에서 모두 유의한 차이점을 보였는데, 특히 채널별 차이를 보기 위해 분석한 홈페이지와 쇼핑몰에서의 리뷰 내용이 가장 두드러진 차이를 보이고 있었다. 한편, 쇼핑몰의 특성을 나타내는 가격과 배송/기타 서비스 항목을 제외하고는 맥락단위의 개수가 홈페이지에서 더 많이 나타남으로써 기업 홈페이지 상의 소비자 리뷰가 쇼핑몰 상의 소비자 리뷰보다 더욱 상세하다는 것을 알 수 있었다. 제품에 대한 만족도 역시 홈페이지의 리뷰에서 더 큰 것으로 나타났으며, 탐색재와 경험재로 나누어 보았을 때 디자인, 구매동기, 추천/재구매, AS/업그레이드 서비스, 그리고 배송/기타 서비스 항목에서 서로간의 차이가 있었으나, 전반적인 만족도의 차이는 없었다. 또한, 가격별로 보았을 때는 디자인, 가격, AS/업그레이드 서비스에서 고가와 저가의 차이를 볼 수 있었으나 전반적인 만족도의 차이는 없었다.

• 복식문화연구
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• 제24권5호
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• pp.600-616
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• 2016

The purpose of this study was to investigate the effects of power blog self-presentation and on-line shopping mall reviews on the word of mouth (WOM) effect and apparel purchasing behavior. Consumers living in Seoul and Gyeonggi received questionnaires. There were 303 usable forms that could be analyzed by descriptive statistics, factor analysis, Cronbach's alpha, and regression analysis. The results were as follows: There was a significant effect of power blog self-presentation such as interactivity, media effect, and business intention on information acceptance through WOM. Power blog self-presentation, such as interactivity and business intention, affect information delivery by WOM significantly. There was a significant effect of review consideration, such as agreement, usefulness, enjoyment, and purity, on information acceptance of WOM. Reviews describing enjoyment, purity, and usefulness affect information delivery of WOM significantly. Business intention, media effect, and purity directly affect apparel-purchasing behavior, and affect the WOM effect as a mediator variable and then purchasing behavior. Whereas, interactivity, overstatement, and enjoyment affect the WOM effect as a mediator variable, and then affect overall purchasing behavior. Therefore, fashion firms consider active interaction with power blog visitors and promote the way of enjoying with fun through review of apparel on-line shopping mall when they try to implement viral marketing with WOM effect.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2000년도 추계학술대회 논문집
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• pp.442-449
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• 2000

Before the complete construction of new high-speed line between Seoul and Pusan, KTX is going to operate on both new high-speed line between Seoul and Daegu and electrified conventional lines between Daegu and Pusan. Then, the wheels of KTX are going to operate on various rails such as KS50N and KS60 of conventional line as well as UIC60 of high-speed line. Also, conventional line will have a mixed traffic mode with various types of trains operating on it, such as Saemaul and Mugunghwa. Hence, this study reviews the wear phenomena of wheels and rails in geometrical point of view by comparing their profiles. The analyses of the results show that because UIC60 rail is designed for KTX, KS50N rail whose profile is similar to that of UIC60 will not have any impact on the shape of wheel wear. On the other hand, KS60 rail is expected to have partial wear on both the flange of KTX wheel and the gauge corner of the rail in the initial stages. However, the operation of the trains whose wheels have 1/20 conicity will cause partial sidewear on the inside of the rail and the movement of the contact point between KTX wheel and the rail toward the inside of the track. As a result, the flange wear of KTX wheel will be reduced and the formation of wear-equilibrium profile will be faster.