• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1997년도 추계학술대회 논문집
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• pp.527-530
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• 1997

An automated process planning system for cold forging of non-axisymmetric parts of comparatively simple shape was developed in this study. Programs for the system have been written with Visual LISP in the AutoCAD using a personal computer and are composed of four main modules such as input module, shape cognition and shape expression module, material diameter determination module and process planning module. The design rules and knowledges for th system are extracted from the plasticity theories. handbook, relevant reference and empirical knowledge of field experts. Generally, in forging, only front view is needed for expression of axisymmetric parts, but non-axisymmetric parts are needed both front view and plane. At the plane, this system cognizes the external shape of non-axisymmetric parts - number of sides of regular polygon and radius of a circle circumscribing the polygon of n sides. At the front view, the system perceives diameter of axisymmetric portions and hight of primitive geometries such as polygon, cylinder, cone, concave, convex, etc.

• 한국GIS학회:학술대회논문집
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• 한국GIS학회 1999년도 추계학술대회 발표요약문
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• pp.26-29
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• 1999

An integrated sewer management system was developed for the analysis of sewer flow and for optimal operation of sewer works using ArcView and SWMM. SWMM and ArcView were dynamically linked together using Avenue in order to construct user-friendly management system. The developed system was applied to a residential area in Choonchun city to verify its utilities. All the relevant field data were analyzed on the basis of developed system, and the modeling of sewer flow was implemented using MET, RUNOFF, TRANSPORT in SWMM. As this system can provide comprehensive prediction of flow and pollution profiles, it could serve as a tool not only for optimal management, but also for decision support system to examine the efficiency of planning and implementation of sewer projects.

• 한국정보처리학회논문지
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• 제6권3호
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• pp.710-721
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• 1999

In this paper, we have designed and implemented a parameter extraction system for analyzing Internet using SNMP. The extraction system has two modules; one is collection request module, and the other is analysis request module. The collection request module generates a polling script, which is used to collect management information from the managed system periodically. With this collected data, analysis request module extracts analysis parameters. These parameters are traffic flow analysis, interface traffic analysis, packet traffic analysis, and management traffic analysis parameter. For management activity, we have introduced two-step-analysis-view. One is Summary-View, which is used find out malfunction of a system among the entire managed systems. The Other is Specific-View. With this view we can analyze the specific system with all our analysis parameters. To show available data as indicators for line capacity planning, network redesigning decision making of performance upgrade for a network device and things like that.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2010년도 추계학술대회
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• pp.359-360
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• 2010

In smart grid system which uses photovoltaic system, fuel cells and so on, a program implemented with C language is used for control and measurement. When using programs implemented with C language GUI is difficult to watch control and monitor the smart grid system. But LabVIEW is a graphical programming language and it is easy to design GUI screen and to manage many variables such as real-time output of electric power including solar cell, wind power system and fuel cell. This paper suggests LabVIEW and C-language TCP/IP communication for smart grid monitoring system i mplemented with C-language.

• 한국CDE학회논문집
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• 제12권2호
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• pp.137-145
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• 2007

This paper concerns about residential environment analysis program implementation for design and analysis on public housing complexes such that view and daylight analysis processes are automated and integrated into existing design routine to achieve better design efficiency. Considering the architectural design trends this paper chooses ArchiCAD as a platform for a CAD system, which contains the concepts such as integrated object-oriented CAD, virtual building and BIM. Residential environment analysis system consists of three components. The first component is the 3D modeling part defining 3D form information for external geographic contour models, site models and interior/exterior of apartment buildings. The second is the parametric library part handling the design parameters for view and daylight analysis. The last is the user interface for the input/output and integration of data for the environment analysis. Daylight analysis shows rendered images as well as results of daylight reports and grades per time and performs the calculations for floor shadow. It separates the site-only analysis from the analysis of site and exterior environmental parameters. View analysis considers horizontal and vertical view angles to produce view image from each unit and uses the bitmap analysis method to determine opening ratio, scenery ratio and void ratio. We could expect better performance and precision from this residential environment analysis system than the existing 2D drawing based view and daylight analysis methods and overcome the existing one-way flow of design information from 3D form to analysis reports so that site design modifications are automatically reflected on analysis results. Each part is developed in a module so that further integration and extension into other related estimation and construction management systems are made possible.

• 조명전기설비학회논문지
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• 제23권8호
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• pp.93-98
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• 2009

열병합발전은 전기와 열을 동시에 발생시켜 에너지 이용률을 높이는 고효율에너지 발전 체계를 말하며, 시스템에 전기에너지를 공급하는 과정에서 배출되는 에너지를 회수하여 산업용 공정, 지역난방, 온수 공급 등에 이용함으로써 종합효율 향상에 많은 영향을 끼친다. 본 논문에서는 LabVIEW를 이용하여 열병합 발전의 흐름을 화면으로 보이고, TCP/IP 통신을 이용하여 지역에너지 시스템을 원거리에서도 제어가 가능한 열 전기 제어 시스템을 보이고자 한다. 열 전기 제어 시스템이 원거리에서 제어가 가능함을 보이기 위해 4대의 컴퓨터로 시뮬레이션을 보였다.

• Journal of the Optical Society of Korea
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• 제18권6호
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• pp.720-731
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• 2014

There are many kinds of optical systems to widen a field of view. Fisheye lenses with view angles of 180 degrees and omni-directional systems with the view angles of 360 degrees are recognized as proper systems to widen a field of view. In this study, we proposed a new optical system to overcome drawbacks of conventional omni-directional systems such as a limited field of view in the central area and difficulties in manufacturing. Thus we can eliminate the undesirable reflection components of the omni-directional system and solve the primary drawback of the conventional system. Finally, tolerance analysis using Zernike polynomial coefficients was performed to confirm the productivity of the new optical system. Furthermore, we established a method of optical axis alignment and compensation schemes for the proposed optical system as a result of tolerance analysis. In a sensitivity calculation, we investigated performance degradation due to manufacturing error using Code V(R) macro function. Consequently, we suggested compensation schemes using a lens group decentering. This paper gives a good guidance for the optical design and tolerance analysis including the compensation method in the extremely wide angle system.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(5)
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• pp.185-188
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• 2002

This paper proposes a view direction-based human computer interface(HCI) system using image observation and EMG signal. CCD camera is available for observation relatively small angular view direction. Large angle is recognized by measuring EMG signal of the sternocleidomastoideus, because it is difficult to detect the large angular view direction by CCD observation. From experimental results, we show the proposed HCI system is useful for the disabled.

• 항공우주시스템공학회지
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• 제5권2호
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• pp.12-17
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• 2011

Pilot and flight crew visual performance in general aviation aircraft operating is paramount for safe operation of the aircraft. Pilot compartment view, instrument and cockpit lighting forms an essential aspect of this visual performance, and therefore warrants guidance and standardization. This study introduces acceptable design criteria for pilot compartment view, instrument and cockpit illumination for general aviation aircraft.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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• 제13권4호
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• pp.205-212
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• 2007

본 논문에서는 시점변환이 가능한 고화질 다시점 비디오 전송 시스템의 디자인 및 구현에 관해 소개한다. 다시점 비디오는 기존의 방송 시스템에 실감성과 몰입감을 증가시키는 차세대 방송 컨텐츠로 각광 받고 있다. 하지만 다시점 비디오 전송 시스템을 구축하기 위해서는 고비용의 하드웨어 컴포넌트들이 필요하고 충분한 대역폭이 요구된다. 본 프로토타입 시스템은 고비용 및 전송 대역폭의 문제를 해결하기 위해서 소프트웨어 기반의 시스템 컴포넌트와 IP 멀티케스트를 이용한 전송에 중점을 둔다. 또한 유동적으로 시점 및 사용자의 수를 화장할 수 있는 시스템 디자인을 고려한다. 본 논문에서는 소프트웨어 기반의 시스템 컴포넌트로 다중화와 역다중화의 구현과 얼굴 추적을 통한 시점전환 기법을 소개한다. 또한 선도망/연구망으로 구성된 실제 네트워크 상황에서 전송 시현을 통해 사용자에게 실감성과 몰입감을 제공할 수 있음을 보여준다.