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A Development of Design Support System for Multistep Deep Drawing Process (다단 디프 드로잉 공정의 설계지원 시스템 개발)

  • 나경환;최석우;최태훈;정완진;김종호;배형수
    • Transactions of Materials Processing
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    • v.9 no.6
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    • pp.638-643
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    • 2000
  • This study Is concerned with the development of design support program for deep drawing process. The present support program is designed to generate the layout drawings by utilizing the following key functions: analysis of product shape, generation of key stages by pattern database, determination of layout generation method, generation of layout. furthermore, from the results by process design program input data for simulation Is automatically generated with appropriate process parameters and connected seamlessly to carry out the finite element analysis so that the design can be checked for the possible problems in real manufacturing process. The designer can generate layout drawings and test the design by simulation quickly and conveniently In these system designer can verify and optimize the design. We tested this system for various type of product shape md found that the generated layout is in good agreement with the real cases.

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Development of the SysLog-based Integrated Log Management system for Firewalls in Distributed Network Environments (분산 환경에서 SysLog기반의 방화벽 통합로그관리시스템 개발)

  • Lee, Dong Young;Seo, Hee Suk;Lee, Eul Suk
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.7 no.4
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    • pp.39-45
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    • 2011
  • Application log files contain error messages; operational data and usage information that can help manage applications and servers. Log analysis system is software that read and parse log files, extract and aggregate information in order to generate reports on the application. In currently, the importance of log files of firewalls is growing bigger and bigger for the forensics of cyber crimes and the establishment of security policy. In this paper, we designed and implemented the SILAS(SysLog-based Integrated Log mAanagement System) in distribute network environments. It help to generate reports on the the log fires of firewalls - IP and users, and statistics of application usage.

The First Stage of Developing the Adolescent Friendship Social Capital Scale

  • Xu, Leilei
    • Child Studies in Asia-Pacific Contexts
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    • v.2 no.1
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    • pp.29-43
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    • 2012
  • The purpose of the study was to generate the candidate items for the Adolescent Friendship Social Capital Scale. Both inductive and deductive approaches were used to generate the scale items. Halpern's conceptual map of social capital served as the theoretical basis of this scale, and guided the development of items. Semi-structured interviews with adolescents in Sydney, Melbourne and Beijing generated the initial pool of scale items. Twenty-six items were generated for the Adolescent Friendship Social Capital Scale. The items are organised in four theoretical constructs: Bonding Networks, Bridging Norms, Bridging Sanctions, and Linking Networks. Each item is a short statement followed by a five-point Likert scale anchored by 1= "Strongly disagree" and 5= "Strongly agree". The scale has several advantages over previous measures of adolescent friendship networks and friendship social capital. The scale has a strong and clear theoretical structure, the scale items demonstrate initial construct and content validity, and the format of the scale enables the collection of continuous data. However, in order to ensure the validity and reliability of the scale, another two stages of research need to be conducted in the future: scale development and scale evaluation.

STEP-based Algorithms for Extraction and Code Generation of Assembly Information (STEP 기반의 조립정보 추출과 코드 생성 알고리즘)

  • Kim K.S.;Choi H.G.
    • Korean Journal of Computational Design and Engineering
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    • v.10 no.6
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    • pp.412-420
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    • 2005
  • The integration of CAD and CAM is critical for computer aided process planning. Recently, STEP has been emerged and utilized as a product data exchange standard format in CAD/CAM areas. The assembly information consists of assembly component relations, assembly features, assembly directions and mating conditions. The purpose of this study is to develop an efficient algorithm to extract assembly information directly from the STEP based files and to generate automatically assembly process plan from the extracted assembly features. The developed algorithms will generate assembly information codes for STEP(AICS). The results from this study can be a reasonable link between design and manufacturing for developing better CAAPP(Computer-Aided Assembly Process Planning) systems.

이산적 시뮬레이션 모델을 이용한 커피 생산 스케줄

  • 박영홍
    • Proceedings of the Korea Society for Simulation Conference
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    • 2000.11a
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    • pp.28-33
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    • 2000
  • This article describes the application of discrete event simulation in a process industry (coffee manufacturing) as a daily production-scheduling tool. A large number of end products (around 300), sporadic demand, and limited shelf life of coffee (90 days) make it difficult to generate feasible production schedules manually. To solve this problem an integrated system was developed incorporating discrete event simulation methodology into scheduling process. The integrated system is comprised of two components: a scheduling program and a simulation model. The scheduling program is used to generate daily schedules for roasting, grinding, and packing coffee. The simulation model uses the generated schedules to simulate the production of coffee and regenerates a modified production schedule. In this paper, each of the components will be described in detail, evaluated in terms of performance factors, and validated with a set of real production data. Although this article focuses on a specific system, we will share our experiences and intuitions gained and encourage other process industries to develop simulation-based scheduling tools.

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Content-based Image Indexing Using PCA

  • Yu, Young-Dal;Jun, Min-Gun;Kim, Daijij;Kang, Dae-Seong
    • Proceedings of the IEEK Conference
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    • 2000.07b
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    • pp.827-830
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    • 2000
  • In this paper, we propose the method using PCA(principal component analysis) algorithm when proposed algorithm performs multimedia information indexing. After we extract DC coefficients of DCT from MPEG video stream which is an international standard of moving picture compression coding, we apply PCA algorithm to image made of DC coefficients and extract the feature of each DC image. Using extracted features, we generate codebook and perform multimedia information indexing. The proposed algorithm Is very fast when indexing and can generate optimized codebook because of using statistical feature of data

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가상 커뮤니티 공간에서 블로거를 위한 추천시스템

  • Kim, Jae-Gyeong;O, Hyeok;An, Do-Hyeon
    • Proceedings of the Korea Inteligent Information System Society Conference
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    • 2005.11a
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    • pp.415-424
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    • 2005
  • The rapid growth of blog has caused information overload where bloggers in the virtual community space are no longer able to effectively choose the blogs they are exposed to. Recommender systems have been widely advocated as a way of coping with the problem of information overload in e-business environment. Collaborative Filtering (CF) is the most successful recommendation method to date and used in many of the recommender systems. Therefore, we propose a CF-based recommender system for bloggers in the virtual community space. Our proposed methodology consists of three main phases: In the first phase, we apply the "Interest Value" to a recommender system. The Interest Value is a quantity value about user preference in virtual community, and can measure the opinion of users accurately. Next phase, we generate the neighborhood group based on the Interest Value. In the final phase, we use the Community Likeness Score (CLS) to generate the top-n recommendation list. The methodology is explained step by step with an illustrative example and is verified with real data of a blog service provider.

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Implementation of a SAR GeoCoding Module based on component

  • Kim, Kwang-Yong;Jeong, Soo;Kim, Kyung-Ok
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.337-339
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    • 2003
  • This paper describes the SAR geocoding module, which is the sub-module of a IRHIS ('Integrated RS s/w for High resolution satellite ImageS'): package of 'Development of High Resolution Satellite Image Processing Technique' project in Electronics and Telecommunications Research Institute (ETRI). The function of this module is following. 1) Orbit Type : ERS1/ERS2, RADARSAT 2) Data Format : SAR CEOS Format(Single Look Complex) 3) Function: - Geocode : Generate a map projected SAR image based on only orbit information - Orthorectify: Generate a rigorous geocoded SAR image with a DEM information In this paper, we briefly describe the algorithm that is adopted to the functions, and component architecture.

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A Study on Topology Processor for Substation Automation (변전소 자동화를 위한 위상구조 처리에 관한 연구)

  • Lee, H.J.;Wang, I.S.;Kang, H.J.;Lee, S.G.;Hong, J.H.;Kim, D.J.;Kang, M.C.;Lim, C.H.
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.21-22
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    • 2007
  • Topology processing is indispensable basic function as it generate a real-time BUS-BRANCH model in Energy Management Systems because most application softwares such as state estimation, power flow, etc., require BUS-BRANCH circuit data. This paper propose an expert system to generate BUS-BRANCH circuit model using Artificial Intelligence technology and it is applied to 154kV distribution substations.

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Improved Free-air Gravity Anomalies by Satellite Altimetry

  • Kim, Jeong-Woo;Roman, Daniel-R.
    • Korean Journal of Remote Sensing
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    • v.17 no.4
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    • pp.297-305
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    • 2001
  • Ocean satellite altimetry-implied free-air gravity anomalies have had the shortest wavelengths removed during the processing to generate the optimal solution between multiple radar altimeter missions. ERS-1 168day mission altimetry was residualized to a reference geoid surface generated by integrating Anderson & Knudsen’s free-air gravity anomalies for the Barents Sea. The altimetry tracks were reduced and filtered to extract the shortest wavelengths (between 4 and 111 km) from both ascending and descending tracks, respectively. These data were recombined using existing quadrant-swapping techniques in the wavenumber domain to generate a correlated, high frequency gravity field related to the local geologic sources. This added-value surface adjusted the reference free-air gravity anomalies to better reflect features in the gravity field at a wavelength related to the distance between altimetry ground tracks.