• 한국콘텐츠학회논문지
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• 제13권7호
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• pp.158-167
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• 2013

시청이동 및 기기이동 이용 판결논리를 토대로 슬링박스를 이용한 TV프로그램의 장소이동 시청의 법적 성격을 공정이용 관점에서 분석하였다. 분석 결과, 소니 판결과 RIAA 판결에 기초하면 장소이동 시청은 비상업적인 사적 이용으로서 공정이용에 해당된다. 냅스터 판결을 적용시킬 경우, 장소이동 시청은 슬링박스 구매자에게만 저작물이 노출되므로 공정이용이지만, 장소이동 기능의 공유는 저작권침해 책임 논란의 소지가 크다. 반면 이용자의 편의성 도모는 저작권 취지에서 벗어난다는 이유로 시간 및 공간이동 기능의 공정이용을 부인한 소니 사건의 2심과 MP3.com 판결에 따르면, 장소이동 시청은 공정이용에 포함되지 않는다. 또한 방송콘텐츠에 미치는 경제적 효과는 플랫폼 확장 차원에서 긍정적이지만, 다양한 단말이 저작권자의 후속시장이 된다는 점에서 부정적이다. 장소이동 시청의 법적 쟁점은 결국 기술혁신과 저작권의 충돌에서 비롯되었다는 점에서 새로운 매체의 법적 책임 분석기준인 "혁신매체의 항변" 을 제안해 본다.

• 한국공작기계학회논문집
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• 제13권1호
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• pp.100-106
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• 2004

All vehicles need the good quality of riding. Especially shifting shock is very important in the evaluation of the riding. Shifting shock is caused by transmission operation that one part and other part of gem are contacting together. This shock affect the feeling of driving. It is clear from these results that the shifting shock is affected by clutch pressure, pressure mode, inertia etc.

• 비파괴검사학회지
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• 제26권3호
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• pp.162-168
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• 2006

Speckle interferometry with phase-shifting method has been applied to measurement of micro-scale displacement through optical signal processing. Four-step phase-shifting method by PZT is used to measure out-of-plane displacement in spot-welded cantilever and results of optical experiments are comparable to those of FEM. Phase-shifting method using Fourier transform by PZT is applied to measurement of in-plane displacement on rectangular steel plate with a circular hole. The results of optical experiment agree well with theoretical calculation. New phase-shifting method in speckle interferometry has been implemented with a quarter wave plate. In-plane displacement of specimen is measured by the new phase-shifting method. Results of optical experiment show that the quarter wave plate can be used for phase-shifting method that is cheap and easy to use in speckle interferometry.

• 한국자동차공학회논문집
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• 제10권2호
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• pp.234-242
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• 2002

In this research, a transmission control unit was developed for a wheel loader on the basis of 16-bit microcontroller system. The TCU has the basic functions which include shifting control algorithm, actuation of six proportional solenoid valves, signal conditioning for four speed sensors, remote data monitoring capability with RF-module and duty cycle identification system which could identify the duty cycles from PWM signals. In order to design the control system, the overall transmission structure of the wheel loader was investigated and its characteristics of shifting were analyzed in advance. For the purpose of identifying the existing control algorithm and acquire some information about the shifting performance, the shifting experiments were performed for various shifting conditions with the conventional TCU. From the previous work on the conventional TCU, the shifting scheme was designed with the open-loop control which is based on the experimental data only to verify the feasibility of the developing TCU's shilling capability. The experimental results show comparable shifting characteristics to that of conventional TCU though the tests were performed at restricted shilling conditions. Hence, we could have the confidence for the development of the wheel loader automatic transmission TCU and its shifting quality could be improved with the adoption of appropriate feedback control scheme.

• 한국자동차공학회논문집
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• 제5권6호
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• pp.202-214
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• 1997

In automotive industries, one of major issues is the shifting shock, which is brought out when two clutches are engaged in an automatic transmission. The engagement and disengagement if two clutches means the variation of the D.O.F(degree of freedom) of system. Therefore to analyze the shifting performance, the variation of D.O.F should be considered in detail. Generally, the programs for analyzing the shifting transients have been developed as the problem-dependent codes because the artificial maris were usually used to indicate the change of shifting phase. To develop a software applicable to a general mechanism of transmissions, a self-determining algorithm of D.O.F must be applied. Through the experiences for the last several years, a generalized analysis software of shifting mechanism(so called by POTAS-MSM Version 2.0) has been developed. In this study, some major ideas of the software and the concept for the analysis of shifting characteristics are presented. In addition to that, this paper shows how to self -determine D.O.F of he multi-slipping systems using the stick-slip criterion on a single slipping mechanism. By using this software, the shifting characteristics of a vehicle are analyzed and compared with the experimental results.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 추계학술대회
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• pp.670-671
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• 2016

자동화 수동변속기는 수동변속기에 액츄에이터를 설치하여 자동으로 수동변속기를 변속할 수 있게 한 변속기로써, 자동화 수동변속기의 조작 편의성과 수동변속기 수준의 높은 연비로 인해 대형 상용차에 많이 적용되고 있다. 대형 상용차에 적용되는 12단 자동화 수동변속기는 다른 자동 변속기와 마찬가지로 자동변속로직과 변속맵에 의해 변속시점을 결정하지만 기존의 방식으로는 변속충격, 클러치 마모, 연비저하 등의 문제점이 발생할 수 있다. 본 논문은 12단 자동화 수동변속기에 알맞은 변속로직 및 변속맵의 설계와 성능확인시험에 대한 내용을 다루고 있다.

• 대한전기학회논문지:전력기술부문A
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• 제54권12호
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• pp.567-572
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• 2005

This paper presents a scheme to design optimal placement of phase-shifting transformers for power system congestion problems. A good design of phase-shifting transformers placement can improve total transfer capability in interconnected systems. In order to find the optimal placement of phase-shifting transformers, the power flows of the interesting transmission lines are evaluated using sequential quadratic programming technique. This algorithm considers power balance equations and security constraints such as voltage magnitudes and transmission line capacities. The proposed scheme is tested in 10 machines 39 buses and IEEE 57 buses systems. Test result shows that the proposed method can find the optimal placement of phase-shifting transformers to solver power system congestion problems.

• 대한원격탐사학회지
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• 제10권1호
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• pp.43-53
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• 1994

삼림을 베어서 태우고 난 직 후의 라오스 북부 화전지역의 MOS-1 위성영상을 처리하여 유역분지 단위로 화전지역의 면적을 산출하였으며, 지형도상에서 얻어낸 하계망과의 상관관계를 분석하기 위하여 PC Arc - Info의 GIS software를 이용하였다. 그 결과 화전의 분포비율이 높은 유역분지에서는 1차수하천의 분기율도 높게 나타남을 알수 있으며, 라오스에 있어서 화전이 지표 의 침식과 토지의 황폐화를 초래하여 여러가지 환경문제를 유발시키는 원인이 된다는 것이 규명 되었다.

• 산업경영시스템학회지
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• 제36권4호
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• pp.25-30
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• 2013

This article deals with the transient analysis in bicycle shifting using a discrete chain model. Among the various components of a bicycle, we focused in the power-transmissions on the contact points between the chain element and sprocket. And by imposing kinematic motions on the front and rear derailleurs, we analyzed the shifting mechanism for increasing the rotational speed of rear wheel. In order to build the dynamic analysis model, we first tore down the real bicycle and measured each component's design parameters. Then we made 3-dimensional CAD models for each component related to the power transmission of a bicycle. Using the converted 3-dimensional dynamic model for the simulation program, we performed non-shifting and shifting dynamic analysis. As a result, we investigated the dynamic behaviors of a discrete chain model focused on the interaction between the chain and sprocket wheel.

• 대한기계학회논문집A
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• 제28권12호
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• pp.1982-1989
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• 2004

In photoelasticity, the directions of principal stresses are given by isoclinic fringe patterns. In this study, photoelastic theory is represented by Jones calculus and the photoelastic 8-step phase shifting method is described. A feasibility study using computer simulation is done to get isoclinics from photoelastic fringes of a circular disk under diametral compression. Fringe patterns of the disk are generated from the stress-optic law. The magnitudes of isoclinics obtained from the fringe patterns of computer simulation and experiment are compared with those of theory. The results are close between them. Then, the 8-step phase shifting method is applied to get distributions of isoclinics along the specified lines of a cuved beam plate under tensile load. Experimental results obtained from the phase shifting method were compared with those of finite element analysis (ANSYS). It is confirmed that measurement of isoclinic distributions is possible by use of photoelasitc phase shifting method.