• Title/Summary/Keyword: 하자 분석

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Humidity Change Rate Analysis for Various Waterproofing Method in Underground Structures During Winter Season (지하 구조물 동절기 온도조건에서의 방수공법별 습도 변화량 분석)

  • An, Ki-Won;Lee, Yeon-Sil;Lee, Jung-Hoon;Song, Je-Young;Oh, Sang-Keun
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.20 no.1
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    • pp.118-125
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    • 2016
  • This paper proposes the appropriate waterproofing methods for underground structures after applying different types of waterproofing materials on the concrete test specimens and selecting the best results out of humidity testing in winter conditions. Results of the testing showed that the underground structures absolutely require relevant waterproofing application based on the environmental conditions; when applied with interior waterproofing, the results showed that the concrete maintained high level of humidity and reinforcing steel within the concrete layer corroded. However, when applied with exterior waterproofing, it was shown that the waterproofing layer prevent direct contact with water and concrete, thereby protecting the concrete structure and improving overall durability. It follows that during underground structure construction, exterior waterproofing methods are have shown by an effective method for improving the durability as well as providing a comfortable interior environment for users.

Estimating User Utility Functions for Network-Resource Pricing (네트워크 자원 가격정책을 위한 사용자 유틸리티 함수 추정법)

  • Park, Sun-Ju
    • Journal of KIISE:Information Networking
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    • v.33 no.1
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    • pp.103-112
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    • 2006
  • Priority-based network service has been widely adopted for the Internet traffic management in the context of IETF differentiated services, and computing optimal prices for such priority-based service is the key topic in many pricing literature. While the equilibrium analysis has been commonly used to this end, many have criticized the validity of the underlying assumption of equilibrium analysis that user utility functions are precisely known. In this paper, we propose a solution for bridging the gap between the existing theoretical work on optimal pricing and the unavailability of precise user utility information in real networks. In the proposed method, the service provider obtains more and more accurate estimates of user utility functions from the initial imprecise knowledge by iteratively changing the price of service levels and observing the users' decisions under the changed price. Our contribution is two-fold. First, we have developed a general principle for estimating the user utility functions. Second, we have developed a novel method for setting the prices that can optimize the extraction of the knowledge about user utility functions. The extensive simulation results demonstrate the effectiveness of our method.

Resident Involvement Analysis of New Town Landscape Architecture Construction - Focused on the Gyeonggi GwangGyo District - (택지개발지구 조경공사의 주민관여 분석 - 경기도 광교지구를 중심으로 -)

  • Oh, Jeong-Hak
    • Journal of the Korean Institute of Landscape Architecture
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    • v.44 no.6
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    • pp.51-59
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    • 2016
  • The purpose of this study is to improve interaction with the construction subject by analyzing the contents and contents of users' involvement in landscaping works. For this purpose, this study selected the Gwanggyo Residential Land Development District Public Landscape Project in Suwon, Gyeonggi Province. For four years before and after the completion, the opinions of tenants were used as research data. Both qualitative and quantitative analyses of 412 complaints received by the project implementation office and local government were conducted. As a result, first, the main purpose of suggesting opinions was 'demanding and expressing complaints', and there were many 'parks' and 'rivers'. In terms of content, "quality" was the most pointed out, but many kinds of trees, such as tree planting, ecological river construction, and pavement construction were also mentioned. Second, the extraction of key words from content analysis was the most common method. Followed by 'additional foodstuff' and 'moving to the toilet and management building'. Much of the point of view about dead wood has continued to be conspicuous in the process of waiting to be dealt with at the time of transplanting. Third, the validity of the contents of the complaints was evaluated as a five - point scale. Therefore, the opinions raised were unreasonable, but overall, there were more complaints with certain objectivity.

An Experimental Study and Value Analysis for Performance Assessment of the Embo-thane Membrane Waterproofing Method (엘보탄도막방수공법의 성능평가를 위한실험적 연구 및 VE분석)

  • Yoon, Cha-Woong;Lee, Seung-Soo;Kim, Sang-Rok;Seo, Jong-Won
    • Korean Journal of Construction Engineering and Management
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    • v.10 no.5
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    • pp.123-134
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    • 2009
  • Since 1970s, urethane waterproofing method is broadly used in rooftops, underground spaces, and sports stadium for its outstanding ultraviolet blockage, watertightness, and elasticity. However, development of slippage-resistance and endurance, improvement of function considering convenience and visually pleasing of users, urethane waterproofing method is necessary, since rooftops and underground spaces have slippage and external force risks. Therefore, many improved waterproofing methods are being developed and, recently, embo-thane waterproofing method, which applies embo-spray coating system, has been developed. This paper explains exposure, nonexposure, and floor-material of embo-thane waterproofing method, and then perform experimental study for comparison with urethane waterproofing method about tensile strength, coefficient of expansion, performance of bond, anti-abrasion, and slippage-resistance. In addition, the performance index was presented for the superiority of embo-thane waterproofing method compared to urethane by setting up evaluation criteria considering not only physical performance but also design side of embo-thane waterproofing method, and Value Analysis applying AHP. Also for an assessment considering uncertain result, Monte Carlo Simulation Method was used to operate reliability analysis through statistic approach method.

Analysis of Dietary Education Contents in Picture Books for Young Children Nutrition Education (유아 영양교육을 위한 유아용 그림책에 나타난 식생활교육 내용 분석)

  • Lee, Ye-Eun;Yoon, Eun-Young
    • Journal of Korean Home Economics Education Association
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    • v.35 no.3
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    • pp.1-20
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    • 2023
  • In order to develop a picture book for desirable eating habits of young children, the contents of nutrition education in picture books were analyzed. A total of 128 picture books were analyzed: 42 picture books from the Nuri-curriculum teacher's guide (Nuri), 40 picture books recommended by the National Library for Children & Young Adults (NLCY), and 46 picture books published by the Center for Children's Food-service Management (CCFM). As a result of analysis of dietary guidelines for Koreans, the item that appeared most frequently in picture books was 'Consume a variety of foods every day' (28.91%). The second most common dietary guidelines in the picture books was 'Enjoy a diet that incorporates local ingredients and is environmentally conscious' (21.88%). As a result of examining the main goal of 'eating right' in the Nuri Curriculum, 'healthy food' accounted for 36.72% and 'eating a variety of food' accounted for 30.47%. 'Eating with the right attitude' 4.69%, 'valuing food' 3.13%, and 'dining etiquette' 6.25% were low. Therefore, it is necessary to develop and distribute picture books that reflect the contents that are insufficient.

Defect Analysis According to the Types and Spatial Type of Block Pavement in Apartment Complex (아파트 단지 내 블록포장의 종류와 공간유형에 따른 하자분석)

  • Park, Geun-Hye;Jung, Sung-Gwan;Jang, Cheol-Kyu
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.23 no.3
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    • pp.91-104
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    • 2020
  • This study was conducted to analyze the characteristics of defects according to the type of block and spatial type by quantitatively examining defects occurring in block pavement in apartment complex. According to the research results, depending on the type of block, defects have occurred 1,394.3ea/100㎡ in interlocking paver blocks, 464.8ea/100㎡ in clay brick paver blocks, and 235.1ea/100㎡ in shot blasted paver blocks. By space type, the defects were occurred 1,576.0ea/100㎡ on the access road paved by interlocking paver blocks and the defects were found 1,139.6ea/100㎡ in interlocking paver blocks, 235.1ea/100㎡ in shot blasted paver blocks, and 797.1ea/100㎡ in clay brick paver blocks, on the sidewalk. Also the defects are occurred 455.6ea/100㎡ on the resting space and 403.2ea/100㎡ on the gym space paved by clay brick paver blocks. Through the size analysis of the defects in the block paver, in the case 'peeling', the largest volume of 2,539.0㎣ on the sidewalk paved with shot blasted paver blocks, and 'Subsidence' occurred at the widest area of 2,096.0㎠ on the sidewalk where interlocking paver block was constructed. The difference in defect occurrence according to the type of block is considered to be influenced by the block production process, and the space type is considered to be caused the difference in the occurrence of defects according to the cause of construction and the usage pattern of residents. This study conducted a survey on defects in block and analyzed the defect characteristic according to paver material and space type. Base on this, it is judged that it can be used as an efficient basic data for material replacement, improvement, paver planning and construction in the future.

A Study on the Origin of the Clothing Terms and Their Interpretations -Focusing on the Misused Foreign Languages- (의류용어의 원류와 그 의미분석 -오용되는 오래어를 중심으로-)

  • 조규회
    • Journal of the Korean Society of Clothing and Textiles
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    • v.19 no.6
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    • pp.933-945
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    • 1995
  • The purpose of this study is to examine the current foreign languages of clothing terms which have been misused, clarify the meanings and suggest the unified teams. The results are as follows. First, English and Japanese are great parts of the origins of the clothing terms in foreign languges which have been misused. And next, there were French, German, Portuguese and Spanish via English and Japanese. Especially, the misused foreign languages in styles, materials of clothing are also via English and Japanese. The compound words in Japanese are many parts of them and misused Japanese, Japanese via English, French, German, Dutch, Spanish, Poltuguese, and some terms can not be found their origin. (ex: 색채, 컬러, 카라) In case of the colors of clothing, the terms have the English marking rules and the Japanese pronounciation. And some unified terms are Korean, English, and Chinese letters. (ex: 빨강, 레드, 적색) There are lots of the misused foreign lagusges in sewing terms. On each case, the corresponding words in English and Japanese were suggested to understand easily. The most of the unified words were suggested in Korean. (ex: 하찌사시 $\rightarrow$ 하자시; padding stitch, 팔자뜨기) In clothing construction, there were lots of the misused terms in Japanese and the corrupted terms of Japanese. And so the explains and the unified terms were suggested. (ex: 구세토리, 몸새맞춤, 나찌, 가위집 (내기)) Finally, the origins of terms in western history of costume were clarified and analyzed the meanings : $\circled1$robe, $\circled2$ jacket, gipon, pourpoint, doublet, justaucorps, habit, flock(coat), cutaway, swallow tail coat, 배광, lounge suit, $\circled3$ coat Robe is the gown style garment which was used by men and women from the Middle ages, the jacket is a short, coat-like garment and coat is a long outer garment. Each origin is different, however the 'jacket' and the 'coat' were used confusely in the middle of 19th century.

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A Method for Establishment of Case-based Software Maintenance Maturity Model (사례기반의 소프트웨어 유지보수 성숙도 모델 수립 방안)

  • Kim, Ji-Hyeok;Kim, Chang-Jae;Rhew, Sung-Yul
    • Journal of KIISE:Software and Applications
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    • v.36 no.9
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    • pp.718-731
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    • 2009
  • Software Maintenance needs to continually improve from corrective maintenance to operational management and service improvement. In this study, we propose a software maintenance maturity model and its evaluation criteria based on 4 maintenance projects of K organization. For the proposal, we derive 13 process areas and 64 evaluation criteria based on some references such as SMMM, ITSMM, ITIL. We evaluate the criteria using 5-point scale, and then establish the maturity model of K organization classified by levels of the maturity model based on the evaluation result. And, to verify and improve the maturity model of K organization, we propose improvements for evaluation criteria. In addition, we apply the maturity model to the 4 projects, evaluate the projects, and propose improvements for the projects based on the evaluation result to identify how the model shows software maintenance improvement.

Structural Analysis of Low Speed Large Diesel Engine Structures using CAD/CAE (CAD/CAE를 이용한 저속 대형 디젤 엔진 구조물의 구조해석)

  • 조종래;이부윤;김진환
    • Journal of Advanced Marine Engineering and Technology
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    • v.21 no.1
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    • pp.13-25
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    • 1997
  • 전 세계의 대형 저속 디젤 엔진을 설계.제작하는 회사는 1980년대에 들어오면서 MAN - B&W, SULZER, MITSUBISHI의 3파전 양상을 띠고 있으며, 세계 시장점유율에서는 MAN - B&W가 50%이상을 차지하고 있다. 한국은 현재 한국중공업, 현대중공업, 쌍용중공업 및 삼성중공업에서 대형 저속 디젤 엔진을 생산하고 있다. 국내에서 생산되고 있는 대형 저속 디젤 엔진은 대부분이 MAN - B&W형이고 SULZER형이 약 20%를 차지하고 있다. 기술력은 위의 3사에 거의 의존하고 있으며, 설계보다는 생산에 치중하고 있는 실정이다. 선박용 엔진 구조물은 베드 플레이드(bed plate), 실린더 프레임(cylinder frame), 프레임 박스(frame box)등이 주 스테이 볼트(long stay bolt)에 의하여 체결되어 한 개의 대형 수직 구조물을 이루고 있으며, 프레임 박스의 안내면(guide plate)과 베드 플레이트의 베어링 지지부(bearing support)등은 엔진의 폭발력과 선박의 추진력을 직접적으로 받으므로 구조적 결함과 하자 보수의 문제들이 발생하고 있다. 이와 같은 사용상 및 제작상의 제문제를 해결하기 위해서는 유한요소 구조 해석 능력을 자체 보유하여 구조 설계상의 문제점을 분석하고 엔진 구조물의 취약 부위를 집중 검토하여야하며, 이를 통해 선박의 운항 중에 일어날 수 있는 사고를 미연에 방지할 수 있다. 그러나 국내에서는 이러한 대형 엔진 구조물의 설계/해석 기술이 거의 없고 구조적 문제점이 발생할 경우에는 모든 사항을 설계사(licensor)에 전적으로 의존하고 있는 실정이다. 한편, 설계 기술을 보유하고 있는 MAN - B&W, NEW SULZER DIESEL사 등은 정밀 구조 해석을 통하여 기존 엔진 구조물에 대한 안전성 및 신뢰성을 높임과 동시에 신 모델 개발에 박차를 가하고 있으나, 기술 이전은 회피하고 있어 대형 엔진 구조물에 대한 구조 해석 기술의 개발이 시급하다고 할 수 있다. 본 해설에서는 CAD/CAE(Computer Aided Design/Computer Aided Engineering)를 이용하여 위에서 제시된 대형 엔진 구조물의 구조해석 절차와 방법에 대해 간략히 설명하고자 한다.

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A Study on the Performance of a Mother Company-Driven Informatization Project for its Suppliers: A Samsung Electronics Case (모기업 주도적 협력업체 정보화 사업 성과에 관한 연구: 삼성전자 사례)

  • Park, Kwang-Ho;Kim, Sang-Soo;Kim, Ho-Taek
    • Information Systems Review
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    • v.8 no.3
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    • pp.225-243
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    • 2006
  • Recently mother company-driven informatization projects have been widely launched for the suppliers. Setting up a proprietary evaluation system for the level of informatization of the suppliers, a mother company provides both financial and consulting supports for the suppliers in order to enhance the utilization level of the ERP(Enterprise Resource Planning) system. With the utilization level enhanced, the whole collaboration network will create a competitive advantage to win over global competition. This paper investigates critical success factors for ERP operational performances through a Samsung Electronics case study. The result of the case study may provide valuable feedback to the strategic decision making and fundamental insights for these collaboration efforts.