• 대한전자공학회논문지
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• 제27권6호
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• pp.910-920
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• 1990

This paper presents a method of constructing an Arithmetic Operation Unit Systems (A.O.U.S.) over Galois Field GF(2**m) for the purpose of the four arithmetical operation(addition, subtraction, multiplication and division between two elements in GF(2**mm). The proposed A.O.U.S. is constructed by following procedure. First of all, we obtained each four arithmetical operation algorithms for performing the four arithmetical operations using by mathematical properties over GF(2**m). Next, for the purpose of realizing the four arithmetical unit module (adder module, subtracter module, multiplier module and divider module), we constructed basic cells using the four arithmetical operation algorithms. Then, we realized the four Arithmetical Operation Unit Modules(A.O.U.M.) using basic cells and we constructd distributor modules for the purpose of merging A.O.U.M. with distributor modules. Finally, we constructed the A.O.U.S. over GF(2**m) by synthesizing A.O.U.M. with distributor modules. We prospect that we are able to construct an Arithmetic & Logical Operation Unit Systems (A.L.O.U.S.) if we will merge the proposed A.O.U.S. in this paper with Logical Operation Unit Systems (L.O.U.S.).

• Journal of the Optical Society of Korea
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• 제20권2호
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• pp.283-290
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• 2016

This study presents an 8x four-group inner-focus zoom lens with one-moving group for a compact camera by use of a focus tunable lens (FTL). In the initial design stage, we obtained the powers of lens groups by paraxial design based on thin lens theory, and then set up the zoom system composed of four lens modules. Instead of numerically analytic analysis for the zoom locus, we suggest simple analysis for that using lens modules optimized. After replacing four groups with equivalent thick lens modules, the power of the fourth group, which includes a focus tunable lens, is designed to be changed to fix the image plane at all positions. From this design process, we can realize an 8x four-group zoom system having one moving group by employing a focus tunable lens. The final designed zoom lens has focal lengths of 4 mm to 32 mm and apertures of F/3.5 to F/4.5 at wide and tele positions, respectively.

• 대한수학회지
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• 제50권5호
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• pp.933-944
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• 2013

Based on the four kinds of theoretical definitions of the continuous module homomorphism between random locally convex modules, we first show that among them there are only two essentially. Further, we prove that such two are identical if the family of $L^0$-seminorms for the former random locally convex module has the countable concatenation property, meantime we also provide a counterexample which shows that it is necessary to require the countable concatenation property.

• 웰빙융합연구
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• 제5권1호
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• pp.1-7
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• 2022

Purpose: This study aimed to investigate spatial and temporal features of motor control in an individual with hemiparesis during the curvilinear gait (CG) and proposed an exercise guideline. Research design, data and methodology: An individual aged 63 with hemiparesis by stroke disease was participated in the study. Autoencoder (AE) was used to extract four motor modules from eight muscle activities of the paretic leg during CG. After extraction, each module of four modules was operationally defined by numbering from M1 to M4 according to spatial and temporal features and compared with results reported in a previous study. Results: As a result, an individual with hemiparesis had motor module problems related to difficulty of weight acceptance (module 1), compensation for the weakness of ankle plantar flexor (module 2), a spastic synergistic pattern (module 3) and difficulty with transition from the swing to stance phase (module 4) in terms of spatial features. Also, a delayed activation timing of temporal motor module (module 2) related to the forward propulsion during CG was observed. Conclusions: Gait rehabilitation for the stroke will need to consider clinical significances in respect of the deterioration of motor module and provide the tailored approaches for each gait phase.

• Journal of Electrical Engineering and Technology
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• 제9권5호
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• pp.1739-1745
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• 2014

Prediction of fault-prone modules continues to attract researcher's interest due to its significant impact on software development cost. The most important goal of such techniques is to correctly identify the modules where faults are most likely to present in early phases of software development lifecycle. Various software metrics related to modules level fault data have been successfully used for prediction of fault-prone modules. Goal of this research is to predict the faulty modules at design phase using design metrics of modules and faults related to modules. We have analyzed the effect of pre-processing and different machine learning schemes on eleven projects from NASA Metrics Data Program which offers design metrics and its related faults. Using seven machine learning and four preprocessing techniques we confirmed that models built from design metrics are surprisingly good at fault proneness prediction. The result shows that we should choose Naïve Bayes or Voting feature intervals with discretization for different data sets as they outperformed out of 28 schemes. Naive Bayes and Voting feature intervals has performed AUC > 0.7 on average of eleven projects. Our proposed framework is effective and can predict an acceptable level of fault at design phases.

• Journal of Power Electronics
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• 제11권4호
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• pp.424-429
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• 2011

In this paper, the simulator of an on-line monitoring system for the range extender electric vehicle has been developed. The messages from the four control modules, the air pressure and fuel level sensors data, and the on/off switching states of 31 indicator lamps can be received through the control area network (CAN), and displayed on the graphic panel. The simulator was designed using the four DSP boards, variable resistors, and toggle switches instead of the four control modules, sensors, and switching state of indicator lamps on an actual series hybrid electric vehicle (SHEV) bus, respectively. The performance of the monitoring technologies was verified with the simulator at the laboratory, and then it was tested on an actual SHEV bus. The simulator is very useful at the initial development of the monitoring system at the hybrid-type or electrical vehicles.

• 한국과학교육학회지
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• 제25권7호
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• pp.754-764
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• 2005

이 연구는 증등학생의 탐구능력 향상을 위한 실생활 소재 탐구모듈 개발 연구이다. 실생활소재를 사용하여 물, 열, 빛, 운동, 물질과 관련된 물리내용으로 모듈을 구성하였는데, 각 모듈 당 4-6개의 관련 활동들이 포함되어 있고, 각 모듈은 학생용 실험서와 교사용 지도서로 구성되어 있다. 모듈을 현장 물리 교사에게 워크삽을 통해 모듈의 목표, 내용, 활용 측면에서 타당도 평가를 받았는데, 모듈의 목표 측면에서는 79%의 긍정적인 평가를 받았고, 내용 측면에서는 77%, 활용 측면에서는 71 %의 긍정적인 평가를 받아, 전체적으로 74 %의 긍정적인 평가를 받았으며, 모듈의 개선점, 보완점등의 설문을 바탕으로 수정보완하여 모듈을 완성하였다.

• 한국통신학회논문지
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• 제33권6B호
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• pp.456-468
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• 2008

본 논문에서는 혼합형 2단 AWG 기반의 WDM-PON을 하드웨어적으로 구현하기 위한 초기 단계로서 입출력 모듈을 설계하고 로직 시뮬레이션을 통해 동작을 검증한다. 혼합형 2단 AWG 기반의 WDM-PON은 32개의 파장을 통하여 128개의 ONU에게 서비스를 제공한다. 이때, 하향 전송에서 각 ONU는 각기 할당된 별도의 파장을 이용하는 반면 상향 전송의 경우 4개의 ONU가 단일의 파장을 공유하는 형태이다. 설계한 WDM-PON MAC 칩은 sub-MAC을 기반으로 하며, 각 sub-MAC마다 제어부, 수신부 그리고 네 개의 송신부로 구성된다. 따라서 본 논문에서는 sub-MAC을 구성하는 송 수신부의 기능, 사용되는 핀, 제어 신호 및 타이밍을 정의하고 이를 기반으로 각 기능 모듈을 설계한다. 설계한 WDM-PON MAC 칩은 각 입출력 모듈이 1Gbps의 송수신률을 가지는 것을 목표로 하였으며 이 동작을 위하여 125MHz 구동 클럭에 맞도록 설계된다. WDM-PON MAC 칩의 설계과정은 FSM(Finite State Machine)을 이용한 설계 흐름을 따랐으며 설계한 sub-MAC의 입출력 기능의 검증 및 성능 평가를 위하여 ModelSIM에서 각 기능별로 시나리오를 작성하고 이를 기반으로 로직 시뮬레이션을 수행한다.

• Journal of Yeungnam Medical Science
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• 제24권2호
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• pp.148-153
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• 2007

배경 : 의학시뮬레이션 교육방법이 새로이 도입되면서 다양한 방법이 개발되었다. 특히 컴퓨터와 인터넷을 이용한 시뮬레이션 교육이 학생들에게 사전에 임상수기 교육 및 임상경험을 가능하게 하여 많은 도움을 주고 있다. 본 연구는 $Microsim^{(R)}$ 프로그램을 이용한 학생들의 첫 경험을 보고하고 컴퓨터와 인터넷을 이용한 시뮬레이션 교육에 대하여 소개하고자 한다. 대상 및 방법 : 의학과 3학년 학생을 대상으로 임상의학입문 과정의 일환으로 $Microsim^{(R)}$ 프로그램을 이용하여 2주간의 실습후 획득한 점수를 산정하여 통과여부를 알아보고자 하였다. 모듈 1은 기도 및 호흡, 모듈 2는 심정지, 모듈 3은 심장 부정맥, 모듈 4는 흉통으로 정하였으며, 4개의 모듈에서 미리 지정된 각각의 증례하나를 선택하여 반복하여 실습하고 최종적으로 각각 통과점수가 70% 이상이 되어야 인정되도록 하였다. 결과 : 전체 75명의 학생이 참가하여 이중 56명(74.7%)이 4개의 모듈을 모두 통과하였다. 각각의 모듈의 평균 통과율은 모듈 1이 86.7%, 모듈 2가 85.3%, 모듈 3과 4가 각각 84.0%였으며, 4개 모듈의 평균점수는 88.6이었다. 결론 : 의학시뮬레이션이 비록 완전하게 통과되지는 않았지만 학생들로 하여금 실제적인 임상경험을 가능하게 하였다. 하지만 이는 아직은 기존의 교육방식의 보조적인 역할을 담당한다고 할 수 있으며 향후 좀 더 다양한 방법으로 반복된 시뮬레이션 교육과 이에 대한 평가가 필요할 것으로 사료된다. 아울러 의학시뮬레이션의 다양한 교육방법에 대하여 소개를 하고자 하였다.

• Journal of Biosystems Engineering
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• 제26권2호
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• pp.163-168
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• 2001

A manipulator for test-cup attachment modules, which was a part of a robot milking system, was developed to reduce cost and labor for cow milking processing. A Cartesian coordinate manipulator was designed for the milking process, because it was quite flexible and can be constructed more economically than any other configuration. The manipulator was made use of DC motors, screws for power transmission, a RS422 interface system for the transmission of coordinate values and a one-chip microprocessor, 89C52. Performance tests of the manipulator were conducted to measure experimentally the precision of all axes. Some of the results are as follows. 1. The Cartesian coordinate manipulator was designed and built. Dimension of the three perpendicular axes (X, Y, and Z) and one arm’s axis(W) to pick up and transfer the modules were 700㎜$\times$450㎜$\times$550㎜$\times$650㎜. The arm’s axis moved the teat-cup attachment module, which attached four teat-cup to four teats, detached four teat-cup from four teats, was designed and manufactured by using CAD, CAM and CNC. 3. After 10 replications of exercising the manipulator, mean precision values(positioning error) of X, Y, Z axes wee 0.48㎜, 0.20㎜, 0.19㎜, respectively. Therefore, we conclude the axes to have a precision better than 0.5㎜, had no problem to operate correctly the milking manipulator.