• 제목/요약/키워드: Technological tool

검색결과 233건 처리시간 0.019초

등고선가공에서의 기술적 요구사항 들 (Technological Requirements in Z-level Machining)

  • 박상철
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2001년도 춘계학술대회논문집C
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    • pp.128-133
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    • 2001
  • For the Z-level machining, a tool-path linking procedure is presented. The linking problem is approached from the technological requirements, such as considering the machining constraints among the tool-path-elements, minimizing the tool-path length and reflecting the oneway/zigzag linking option. To simplify the linking problem, we develop a data structure, called a TPE-net, providing information on the machining constraints among the tool-path-elements. By making use of the TPE-net, the tool-path linking problem becomes a touring problem so that every node has been traversed.

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레이저 패턴 가공용 스캔 공구경로 생성 (Scan Tool-Path Generation for Laser Pattern Machining)

  • 이창호;박상철
    • 한국CDE학회논문집
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    • 제16권4호
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    • pp.300-304
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    • 2011
  • This paper proposes an approach to generate tool-path for laser pattern machining. Considering the mechanical structure of a laser pattern machine, it is quite similar to that of a 2D milling machine. Based on the observation, one may try to utilize the tool-path generation methodologies of 2D milling for the laser pattern machining. However, it is not possible to generate tool-path without considering the technological requirements of laser pattern machining which are different from those of 2D milling. In this paper, we identify the technological requirement of laser pattern machining, and propose a proper tool-path generation methodology to satisfy the technological requirements. For the efficient generation of tool-path, this paper proposes a tool-path element computation method, which is based on the concept of a monotone chain.

Multivariate Analysis of Covariance on Characteristics Influencing Technological and Managerial Barriers of Technology Startups

  • Geonil Ko;Namjae Cho
    • Journal of Information Technology Applications and Management
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    • 제31권1호
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    • pp.27-43
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    • 2024
  • This study investigated technological and managerial barriers in technology startups through a survey of 151 companies, yielding 118 responses (78.1% response rate). Factor and multivariate analyses identified two distinct barriers: technological and managerial. Reliability analysis validated the measurement tool. Using MANCOVA, 12 hypotheses were tested, incorporating six independent variables. Results revealed significant disparities in technological and managerial barriers based on establishment type, commercialization goals, growth stage, and commercialization stage, with 5 hypotheses supported. This study highlights the crucial role of these variables in understanding barriers within technology-based startups.

IT산업의 기술혁신 영향 요인에 대한 모형 연구 (A Model Study on the Effect of Technological Innovation Factors in IT Industry)

  • 박태훈;박경혜
    • 디지털융복합연구
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    • 제10권5호
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    • pp.177-183
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    • 2012
  • IT 산업 기업간의 갈수록 치열해지고 있는 경쟁 환경에서 기업이 생존하기 위한 기술혁신은 경쟁력 확보를 위한 필수요소가 되고 있다. 이러한 기술혁신은 기업의 생존을 위해 반드시 필요하며 다양한 요인들이 기술혁신의 성공을 거두기 위해 반드시 고려되어야 한다. 본 고에서는 IT산업을 기반으로 기술 혁신에 영향을 미치는 요인을 파악하고 이러한 영향 요인에 관련된 다른 연구와의 비교 분석을 통해 새로운 연구모형을 설정하는 것을 목표로 하고 있다.

포켓가공을 위한 오프셋 공구경로 연결 알고리즘 (Contour Parallel Tool-Path Linking Algorithm For Pocketing)

  • 박상철;정연찬
    • 한국CDE학회논문집
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    • 제6권3호
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    • pp.169-173
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    • 2001
  • Presented in this paper is a CPO tool-path linking procedure optimizing technological objectives, such as dealing with islands (positive and negative) and minimizing tool retractions, drilling holes and slotting. Main features of the proposed algorithm are as follows; 1) a data structure, called a 'TPE-net', is devised to provide information on the parent/child relationships among the tool-path-elements, 2) the number of tool retractions is minimized by a 'tool-path-element linking algorithm'fading a tour through the TPE-net, and 3) the number of drilling holes is minimized by making use of the concept of the 'free space'.

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3D INTERACTIVE SEGMENTATION OF BRAIN MRI

  • Levinski, Konstantin;Sourin, Alexei;Zagorodnov, Vitali
    • 한국방송∙미디어공학회:학술대회논문집
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    • 한국방송공학회 2009년도 IWAIT
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    • pp.55-58
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    • 2009
  • Automatic segmentation of brain MRI data usually leaves some segmentation errors behind that are to be subsequently removed interactively, using computer graphics tools. This interactive removal is normally performed by operating on individual 2D slices. It is very tedious and still leaves some segmentation errors which are not visible on the slices. We have proposed to perform a novel 3D interactive correction of brain segmentation errors introduced by the fully automatic segmentation algorithms. We have developed the tool which is based on 3D semi-automatic propagation algorithm. The paper describes the implementation principles of the proposed tool and illustrates its application.

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이차곡선 수업에서 공학도구 사용과 수작업 교구 활동에 대한 예비 수학교사들의 인식 (Prospective Mathematics Teachers' Perceptions of the Use of Hands-On Manipulatives and Technological Tools in Teaching Quadratic Curves)

  • 김소민
    • 한국학교수학회논문집
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    • 제24권1호
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    • pp.151-172
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    • 2021
  • 본 연구에서는 이차곡선 지도 방안으로써 수작업 교구인 Wax-paper를 이용한 활동과 공학도구인 GeoGebra를 이용한 활동에 대한 예비 수학교사들의 인식을 조사하였다. 수도권 소재의 한 사범대학 수학교육과 학부생 20명을 대상으로 이차곡선에 대한 교구와 공학도구 활용 수업을 진행한 후, 두 가지 수업 방법에 대한 인식 설문조사를 시행하였다. 본 연구 결과에 따르면, 예비 수학교사들은 이차곡선 학습 및 지도에서 전반적으로 공학도구의 활용을 선호했으며, 공학도구의 활용이 시각화를 통해 직관적 사고에 도움이 되며, 다양한 수학적 성질 탐구를 가능하게 함으로써 개념 이해와 흥미 유발에 도움을 준다고 생각하였다. 그러나 학생 또는 교사의 미숙한 공학도구 사용에 대한 우려를 지속적으로 나타냈으며, 예비 수학교사들이 인식한 교구와 공학도구 활용의 장단점은 상호보완적이었다. 이와 같은 연구 결과를 토대로 수학수업에서 각 교구와 공학도구가 가진 특성에 맞게 상호보완적으로 활용하길 제안하며, 학생 또는 교사의 공학도구 사용 능력에 영향을 받지 않는 수업자료의 개발 및 보급이 필요하다는 시사점을 제시한다.

정수처리공정 시뮬레이터 개발 기초연구 (Basic study on development of drinking water treatment process simulators)

  • 변용훈;신휘수;김호용;정남정
    • 상하수도학회지
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    • 제35권5호
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    • pp.351-365
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    • 2021
  • Water treatment process simulator is the tool for predicting sequential changes of water quality in a train of unit processes. This predicts the changes through governing equations that represent physicochemical performance of each unit processes with an initial and boundary conditions. Since there is no operational data for the design of a water treatment facility, there is no choice but to predict the performance of the facility by assuming initial and boundary conditions in virtual reality. Therefore, a simulator that can be applied in the design stage of a water treatment facility has no choice but to be built as a numerical analysis model of a deductive technique. In this study, we had conducted basic research on governing equations, inter-process data-flow, and simulator algorithms for the development of simulators. Lastly, this study will contribute to design engineering tool development research in the future by establishing the water treatment theory so that it can be programmed in a virtual world and suggesting a method for digital transformation of the water treatment process.

기계산업에서의 중진국 함정과 기술추격: 한국 기계산업의 사례 (The 'Middle-Income Country Trap' and Technological Catch-up: The Case of the Machine Tools Industry in Korea)

  • 김윤지
    • 기술혁신연구
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    • 제14권1호
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    • pp.147-175
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    • 2006
  • One of the biggest problems of Korean economy is polarization of firms for export and domestic demand and that of conglomerates and SME's achievement. One of the culprits lies weakness of intermediate industry such as machine tool. Since intermediate industry is important path where export performance affects domestic demand and whose actor usually is SMEs with high spill over effect in labor market. Especially, intermediate industry Is vulnerable because of industrial policy biased In backward linkage effect. However if a country fails to develop intermediate industry above some critical point, that country would fall in low-tech equilibrium without growth. In case of benign circle where final goods industry growth leads growth of intermediate industry and again it leads that of final goods industry, it can reach high-tech equilibrium. By contrast, in opposite case where in industrialization latecomer fails to link industries likewise above some critical point that country would fall in low-tech equilibrium without growth. Moreover, for several reasons, machine tool firms of Korea have difficulty in catching up technology above critical point. Firstly. Conglomerate demander neglects their product. Secondly, even after success of development overcoming difficulties they fail to get market share for response of dumping of foreign competitors. And the last one is patent litigation of foreign competitors that incapacitate the technology development. For these, Korean machine tool firms fell in 'middle-income country trap' itself, since they stuck in some extent when they technologically catch up. Consequently, for latecomer country in machine tool industry to leapfrog meaningfully policy support is necessary, Weak intermediate industry does not Induce domestic firms and remained fragile. Therefore, localization, policy should reflect condition of technological catch up more than before, in order to be effective and fruitful. There should be turning point over relationship between conglomerates, major demander of machine tool and SME's, for only with active purchasing of conglomerate Korean machine industry can grow.

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IT제조업 정부 지원 수준이 기술혁신에 미치는 영향 (Effect of IT Manufacturing Firms' Technological Innovation Factors -From Government Support Level-)

  • 박태훈;박경혜
    • 디지털융복합연구
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    • 제10권6호
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    • pp.17-22
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    • 2012
  • IT산업 기업 간의 치열한 경쟁 환경에서 기업 생존을 위한 기술혁신은 경쟁력 확보를 위한 필수요소가 되고 있다. 이러한 기술혁신은 기업의 생존을 위해 반드시 필요하며 다양한 요인들이 기술혁신의 성공을 거두기 위해 필수적으로 고려되어야 한다. 본 논문에서는 정부의 지원 수준이 기술혁신의 성패에 어떠한 영향을 미치는지를 로지스틱 회귀분석을 통해 살펴보았다. 결론적으로 정부지원 측면에서 IT제조업의 제품혁신 성공을 위해서는 직접적인 기술개발 및 사업화 지원을 위한 자금 지원이 필요하며, 공정혁신을 위해서는 기술인력 지원이나 교육연구 지원 등이 성공여부에 영향을 미치는 것으로 분석되었다.