• Title/Summary/Keyword: 작업 깊이

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Design LixV2O5 Cathode Structure for Effective Lithium Ion Intercalation (리튬 이차전지 양극재 LixV2O5의 효율적인 방전을 위한 구조 설계)

  • Park, Jun Kyu;Kim, Soo Il;Kim, Dongchoul
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.38 no.7
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    • pp.589-594
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    • 2014
  • Recently, higher capacity and energy density of lithium ion batteries are increasingly demanded for enhancing their performance in view of the rise in the commercial distribution of electric and hybrid vehicles. Computational analysis of a porous structure of vanadium pentoxide cathode was performed, employing a phase field model. The incipient model was designed as a spherical structure with cylindrical-shaped pores. Modifying the diameters and lengths of the pore cylinder and the number of pores, we considered different conditions for the porous vanadium pentoxide cathodes for analyzing their effect on the amount of lithium ion intercalated to them. Subsequently, we optimized the porous structure to contain the largest amount of intercalated lithium ion during discharge.

Linkage Expansion in Linked Open Data Cloud using Link Policy (연결정책을 이용한 개방형 연결 데이터 클라우드에서의 연결성 확충)

  • Kim, Kwangmin;Sohn, Yonglak
    • Journal of KIISE
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    • v.44 no.10
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    • pp.1045-1061
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    • 2017
  • This paper suggests a method to expand linkages in a Linked Open Data(LOD) cloud that is a practical consequence of a semantic web. LOD cloud, contrary to the first expectation, has not been used actively because of the lack of linkages. Current method for establishing links by applying to explicit links and attaching the links to LODs have restrictions on reflecting target LODs' changes in a timely manner and maintaining them periodically. Instead of attaching them, this paper suggests that each LOD should prepare a link policy and publish it together with the LOD. The link policy specifies target LODs, predicate pairs, and similarity degrees to decide on the establishment of links. We have implemented a system that performs in-depth searching through LODs using their link policies. We have published APIs of the system to Github. Results of the experiment on the in-depth searching system with similarity degrees of 1.0 ~ 0.8 and depth level of 4 provides searching results that include 91% ~ 98% of the trustworthy links and about 170% of triples expanded.

Domain Analysis and Component Extraction for Defence Software (국방 소프트웨어의 도메인 분석과 컴포넌트 추출)

  • Song, Ho-Jin;Choi, Eun-Man;Jeon, Byung-Kook;Kim, Young-Chul
    • The KIPS Transactions:PartD
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    • v.11D no.1
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    • pp.123-132
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    • 2004
  • Defense software has short of interoperability due to the vertical development method which is dependent heavily on application area and development environments. In order to prevent from lack of reusability and operability in application domain software development technology needs component concept and makes shift to the trend of domestic software component industry. This paper covers the research topics such as domain analysis and component architecture to improve and extend reusability and inter-operability for defense information system by two approaches, i.e. CBW (Command Based Work flow) analysis and UML components identification.

Application of a New NDI Method using Magneto-Optical Film for Inspection of Micro-Cracks (미소균열 탐상을 위한 자기광학소자를 이용한 비파괴탐상법의 제안과 적용)

  • Lee, Hyoung-No;Park, Han-Ju;Shoji, Tetsuo
    • Journal of the Korean Society for Nondestructive Testing
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    • v.21 no.2
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    • pp.197-203
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    • 2001
  • Micro-defects induced by design and production failure or working environments are known as the cause of SCC(Stress Corrosion Cracking) in aged structures. Therefore, the evaluation of structural integrity based on micro-cracks is required not only a manufacturing step but also in-service term. So we introduce a new nondestructive inspection method using the magneto-optical film to detect micro-cracks. The method has some advantage such as high testing speed, real time data acquistion and the possibility of remote sensing by using of a magneto-optical film that takes advantage of the change of magnetic domains and domain walls. This paper introduces the concept of the new nondestructive inspection method using the magneto-optical film, also proves the possibility of this method as a remote testing system under oscillating load considering application on real fields by applying the method to four types of specimens.

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Analysis of effective gesture acting animation - Charlie Chaplin, Buster Keaton's acting (애니메이션의 효과적인 제스처연기 분석 - 찰리 채플린, 버스터 키튼의 과장연기 비교를 중심으로)

  • Lee, Da-Na;Park, Jin wan
    • Cartoon and Animation Studies
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    • s.34
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    • pp.45-79
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    • 2014
  • The purpose of this study is to propose divergence from standardization of animation acting through working on investigating gestures comprising most principal exaggeration acting elements in animation acting. For this purpose, this study utilizes animation 12 principles and Laban's effort theory. This study respectively analyzes 2D and 3D animation gesture expressions that are standards for comedy silent film and derive commonness and difference from them. In the next, this study explores the possibility of how animation can utilize acting of comedy silent film. Charles Chaplin and Buster Keaton used to be important elements referring to early animation acting, but as the recent animation technology gets advanced, they are not treated significantly any more. However, as 3D animation turns out to be chief concerns and the roles that acting, dynamics and performance play become gradually important, the necessity is on the rise that Charles Chaplin and Buster Keaton's gesture performances should more prudently be reinterpreted.

Development of Multi-purpose Marine Wastes Cleaning Systems for the Shallow Waters(PART II : System Development and Performance Evaluation) (천수용 다기능 해양폐기물 수거시스템 개발(PART II : 시스템 구성 및 성능시험))

  • Cho Yong-Jin;Moon Il-Sung;Shin Myung-Soo;Yu Jeong-Seok;Kang Chang-Gu
    • Journal of the Korean Society for Marine Environment & Energy
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    • v.5 no.2
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    • pp.62-67
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    • 2002
  • This paper - following 'Development of multi-purpose marine waste cleaning systems for the shallow waters (Part I : preliminary conceptual design)'- describes on the system development and the sea trial performance evaluation(Cho[2003]). The multi-functional seabed waste collecting system and the towing hook system were developed. The maximum working depth of these systems are 15 and 100 meters, respectively(MOMAF[2001]). For the multi-purpose use to collect the marine waste, this system contains floating waste collecting device for the waste on seawater and remained waste collecting device for the waste on seabed, while steel wire cutting system is added for higher efficiency In order to evaluate the system performance, the prototype of multi-functional system was constructed and the sea trial test at shallow water were carried out. As a result, this system operated well with safe and without any interaction so that the developed systems are practicable and applicable.

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Robust Real-Time Visual Odometry Estimation for 3D Scene Reconstruction (3차원 장면 복원을 위한 강건한 실시간 시각 주행 거리 측정)

  • Kim, Joo-Hee;Kim, In-Cheol
    • KIPS Transactions on Software and Data Engineering
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    • v.4 no.4
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    • pp.187-194
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    • 2015
  • In this paper, we present an effective visual odometry estimation system to track the real-time pose of a camera moving in 3D space. In order to meet the real-time requirement as well as to make full use of rich information from color and depth images, our system adopts a feature-based sparse odometry estimation method. After matching features extracted from across image frames, it repeats both the additional inlier set refinement and the motion refinement to get more accurate estimate of camera odometry. Moreover, even when the remaining inlier set is not sufficient, our system computes the final odometry estimate in proportion to the size of the inlier set, which improves the tracking success rate greatly. Through experiments with TUM benchmark datasets and implementation of the 3D scene reconstruction application, we confirmed the high performance of the proposed visual odometry estimation method.

An Approach to the BIM-enabled Assessment of Building Circulation using Quantitative Data and its Weight (동선관련 정성적 요구사항 평가를 위한 가중치를 적용한 BIM기반 정량데이터 활용방안에 관한 연구)

  • Shin, Jaeyoung;Lee, Jin-Kook
    • Journal of Digital Contents Society
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    • v.16 no.2
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    • pp.335-343
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    • 2015
  • This paper describes a quantitative approach to the BIM-enabled assessment of building circulation by using quantitative data and applying its weight. Assessment of building circulation plays an important role before construction stage because of related requirements regulated by design guide, building codes, etc. and design decision making as well. In this paper, Qualitative issue is mainly dealt with that are usually excluded from rule checking objects due to their implicit definition such as 'comfortable circulation'. A weighting framework is suggested using weighted data of circulation properties such as 1) metric distance, 2) number of passing spaces, 3) number of turning spaces, 4) window area of passing space, etc.

일부 산업장 생산직 근로자의 예방적 건강행위에 관한 연구

  • Kim, Yeong-Ran
    • Korean Journal of Occupational Health Nursing
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    • v.2
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    • pp.52-59
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    • 1992
  • 본 연구는 예방적 건강행위에 대한 필요성 인식 정도와 실천정도를 파악하고 이를 요인분석하여 산업장의 예방적 건강행위를 이끌기 위한 프로그램의 기틀을 세우기 위해 시도되었다. 연구도구는 참고문헌과 선행연구 등을 참조하여 본 연구자가 만든 설문지를 사전 조사후 수정, 보완하여 사용하였다. 연구대상은 경기도 소재의 2개 기계제조업체에 근무하는 근로자들이였으며 1989년 5월 5일부터 10일까지 자료를 수집하였다. 수집된 자료 중 탈락 및 기재가 불충분한 질문지를 제외한 284명의 응답자를 분석에 사용하였다. 자료분석은 SPSS를 이용하여 전산처리하였으며, 연구결과는 다음과 같다. 1) 예방적 건강행위의 필요성 인식정도의 평균은 122.1점으로 매우 높은 점수분포를 나타냈으며, 실천정도의 평균은 87.6점으로 필요성 인식정도 보다는 낮은 실천정도를 나타냈었다. 2) 예방적 건강행위에 대한 필요성 인식정도와 실천 정도간의 상관관계를 분석한 결과 29개 예방적 건강행위 중 20개의 항목에서 통계적으로 유의한 상관관계를 보였다. 이것을 예방적 건강행위에 대한 필요성 인식정도가 높을수록 실천정도가 높은 것을 의미하는 것으로 인식정도가 행위에 영향을 미침을 반영하고 있다. 3) 요인분석결과 29개의 예방적 건강행위 항목들은 7가지의 요인으로 범주화되었으며 각 범주들은 요인부하량이 높은 것들을 참고로 하여 보건의료자원활동을 통한 예방적 건강행위, 개인위생에 대한 예방적 건강행위, 작업과 관련된 건강행위, 식습관을 통한 예방적 건강행위, 휴식을 통한 예방적 건강행위, 기호습관(금연, 금주)을 통한 예방적 건강행위, 활동을 통한 예방적 건강행위등으로 명명할 수 있었다. 결론적으로 생산직에 종사하고 있는 근로자들은 예방적 건강행위에 대한 필요성을 깊이 인식하고 있으나, 실천정도는 그에 미치지 못하고 있었다. 그러나 예방적 건강행위의 필요성 인식정도와 실천정도간의 상관관계에서 29개 항목중 20개 항목에서 유의한 상관관계를 보여 인식정도가 높을 수록 실천정도가 높은 것으로 나타났다. 이는 근로자의 건강에 대한 인식 및 태도가 가장 직접적으로 영향을 미칠 수 있는 산업간호사의 역할 중 보건교육에 대한 업무가 보다 중요한 비중으로 수행되어져야 함을 시사하는 결과라고 볼수 있다.

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Automatic Layer-by-layer Dipping System for Functional Thin Film Coatings (다층박막적층법 적용 기능성 박막 코팅을 위한 자동화 시스템)

  • Jang, Wonjun;Kim, Young Seok;Park, Yong Tae
    • Composites Research
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    • v.32 no.6
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    • pp.314-318
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    • 2019
  • A simple and very flexible automatic dipping machine was constructed for producing functional multilayer films on wide substrates via the layer-by-layer (LbL) assembly technique. The proposed machine exhibits several features that allow a fully automated coating operation, such as various depositing recipes, control of the dipping depth and time, operating speed, and rinsing flow, air-assist drying nozzles, and an operation display. The machine uniformly dips a substrate into aqueous mixtures containing complementary (e.g., oppositely charged, capable of hydrogen bonding, or capable of covalent bonding) species. Between the dipping of each species, the sample is spray cleaned with deionized water and blow-dried with air. The dipping, rinsing, and drying areas and times are adjustable by a computer program. Graphene-based thin films up to ten-bilayers were prepared and characterized. This film exhibits the highly filled multilayer structures and low thermal resistance, indicating that the robotic dipping system is simple to produce functional thin film coatings with a variety of different layers.