• 한국환경교육학회지:환경교육
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• 제10권2호
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• pp.213-228
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• 1997

This study was planned to test the educational effects of self-guiding environmental interpretation panel. For purpose of the study, self-guiding interpretation panel was set up along the trail of green shower area of Kwang-Reung Arboretum in 1995,and the environmental behavior related variables such as attitude, locus of control, personal responsibility, general knowledge, and intention to act were closen based on Hines and his colleagues' Responsible Environmental Behavior model(1987). The pre-test/post-test non-random control group design was introduced fo test the effects of panel. ANCOVA was used to test the differences between experimental and control group because of the need to consider the effects of other variable such as socio-economic variables on the changes of environmental behavior related variables. Among 5 environmental behavior related variables, the changes of attitude and knowledge were significantly different between experimental group and control group, and the experimental group's direction of change was more favorable for environment. It is concluded that the educational effects of self-guiding interpretation panel were partially accepted. Several recommendations and restrictions of the study are presented.

• 전력전자학회논문지
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• 제23권1호
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• pp.47-58
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• 2018

A solar array simulator (SAS) consists of an engine that generates a setpoint according to panel characteristics, a power stage that provides the actual output, and a controller. Particularly, if the control method is not suitable due to the nonlinearity of the solar panel output curve depending on the irradiation amount and the temperature, and the variation of the curve factor depending on the various panel materials, then the panel simulation function cannot be performed properly. Current and voltage mode controls are usually used for the conventional control method. However, these control methods deteriorate the control performance near the maximum power point; thus, a hybrid control method using two or more controllers has been investigated. In this study, we analyze the hybrid control method using three controllers divided into different areas. The design equation of the controller is derived based on the small signal modeling of each controller, and the simulation performance of the solar array simulator verifies its stability and response speed.

• 제어로봇시스템학회논문지
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• 제17권12호
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• pp.1194-1202
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• 2011

A touch panel system has been one of the most widely used input devices. In this study, a touch panel embedded system using accelerometers is considered in order to make commercial white-boards or plates into touch panels. Three accelerometers are located at different positions on such a white board, so that touch points on the board can be identified using the sensors. For the identification of touch points, a TDOA (Time Difference of Arrivals) technique is applied in the algorithm which was implemented in a DSP board (TI 6713 DSK), which can provide a precise touch location by using the cross-correlation function of measured signals from the three accelerometers. Experiment results show that the touch panel system with accelerometers could provide the exact touch location. Thus a novel approach using such accelerometers could be applied to a new touch panel system.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1994년도 춘계학술대회논문집
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• pp.75-84
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• 1994

A control panel layout method based on the constraint satisfaction problem(CSP) technique was developed to generate an ergonomically sound panel design. This control panel layout method attempts to incorporate a variety of relevant ergonomic principles and design constrains, and generate an optimal or, at least, a "satisfactory" solution through the efficient search algorithm. The problem of seeking an ergonomically sound panel design should be viewed as a multiple criteria problem, and most of the design objectives should be understood as constraints. Hence, a CSP technique was employed in this study for dealing with the multi-constraiants layout problem. The efficient search algorithm using "preprocess" and "look ahead" procedures was developed to handle the vast amount of computational effort. In order to apply the CSP technique to the panel layout procedure, the ergonomic principles such as spatial compatibility, frequency-of- use, importance, functional grouping, and sequence-of-use were formalized as CSP terms. The effectiveness of the developed panel layout method was evaluated by example problems, and the results clearly showed that the generated layouts took various ergonomic design principles into account.esign principles into account.

• International journal of advanced smart convergence
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• 제4권1호
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• pp.104-113
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• 2015

This paper focuses on a temperature effects on a PV panel which has been installed in Thailand. The main objective is cleaning PV panels and reduce temperature of PV panel by water injects from waterway and experimental results of PV power what it is difference. This project is designed by PLC control system which water injects and control PV temperature, In addition, this project consists of hardware and software such as water pump, water injection and PLC control has been automatically and it can be control system manually. The automatic control system is working when PV temperature rises up over 45 degree Celsius after that the pumping machine would inject water to the surface of PV panels and it must be stop when the PV panel temperature comes down less than 45 degree Celsius. The result of actual experimental found that the control system has been done correctly under specify condition. The experimental has been shown electrical data before and after water injects on PV system found that the electrical power a bit increases and The energy has been taken from PV panel less than energy consumption equipment of control system which taken to operate the water injecting system.

• 한국컴퓨터정보학회논문지
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• 제15권12호
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• pp.133-142
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• 2010

현재 사용되고 있는 P형 수신기는 화재 발생의 위치 검색 및 장치의 고장 유 무 등 을 실시간으로 확인하기 어렵기 때문에 화재가 발생했을 경우 인명 및 재산 피해 등을 예방 할 수 있는 기능이 없다는 문제점을 가지고 있다. 본 논문에서는 P형 수신기에서의 고장 유무에 대한 발생 신호를 실시간으로 감지할 수 있고, 화재 발생신호에 대하여 원격지에서 P형 수신기의 상황발생 정보를 탐지할 수 있는 통합화재 자동 시스템 모델을 제안한다. 제안된 시스템에서는 P형 수신기에서 상황정보를 수집 전송할 수 있는 인터넷 접속장치 부분과 P형 수신기로부터 생성된 상황정보를 분석할 수 있는 상황정보 분석 모듈 등을 설계하고 구현하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.347_348
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• 2009

In this paper, we described the integrated monitoring system for low-voltage panel boards. This system consists of three parts, a panel board controller, an integrated monitoring unit and a remote PC. The panel board controller which was made of CT/PT unit, control unit and power supply is able to transmit variable parameter for monitoring and diagnosis of low voltage branch circuits. Also, the integrated monitoring unit was collected monitoring data from panel boards and displayed on the touch panel.

• Journal of the Korean Wood Science and Technology
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• 제29권3호
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• pp.36-46
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• 2001

This study was to find a way of reusing wood and plastic wastes, which considered as a troublesome problem to be solved in this age of mass production and consumption, in manufacturing wood fiber-polypropylene fiber composite panel. And the feasibility of this composite panel as a substitute for existing headliner base panel of automobile was also discussed, especially based on physical and mechanical performance. Nonwoven web composite panels were made from wood fiber and polypropylene fiber formulations of 50 : 50, 60 : 40, and 70 : 30, based on oven-dry weight, with densities of 0.4, 0.5, 0.6, and 0.7 g/$cm^3$. At the same density levels, control fiberboards were also manufactured for performance comparison with the composite panels. Their physical and mechanical properties were tested according to ASTM D 1037-93. To elucidate thickness swelling mechanism of composite panel through the observation of morphological change of internal structures, the specimens before and after thickness swelling test by 24-hour immersion in water were used in scanning electron microscopy. Test results in this study showed that nonwoven web composite panel from wood fibers and polypropylene fibers had superior physical and mechanical properties to control fiberboard. In the physical properties of composite panel, dimensional stability improved as the content of polypropylene fiber increased, and the formulation of wood fiber and polypropylene fiber was considered to be a significant factor in the physical properties. Water absorption decreased but thickness swelling slightly increased with the increase of panel density. In the mechanical properties of composite panel, the bending modulus of rupture (MOR) and modulus of elasticity (MOE) appeared to improve with the increase of panel density under all the tested conditions of dry, heated, and wet. The formulation of wood fiber and polypropylene fiber was considered not to be a significant factor in the mechanical properties. All the bending MOR values under the dry, heated, and wet conditions met the requirements in the existing headliner base panel of resin felt.

• 대한전자공학회논문지
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• 제22권2호
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• pp.66-74
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• 1985

본 논문은 중앙집중제각용 마이크로컴퓨터의 제어감을 마이크로프로세서로 구성하는 방안을 제시하려는데 그 목적이 있다. 분산다중시스템에서 중앙집중제어를 마이크로컴퓨터로 하는 경우. 이에 대한 제각회은 종래 인터럽트 중심의 논리회로 구성되고 있다. 그러나, 이것은 HALT 상태나 인터럽트 마스크시의 조작 불능, ROM용량의 실질적 축소, 프린트기관의 증대 등 많은 문제점을 안고 있다. 이러한 문제점을 해결하고. 나아가 조작안내나 자기진단과 같은 기능도 담당시키기 위하여, 본 논문에서는 이것을 마이크로프로세서로 구성할 것을 제안한다. 이 제안의 실현 가능성을 실현하기 위하여, 본 논문에서는 구체적인 모델 시스템을 선정한 다음, 이 모델 시스템의 제어반을 마이크로프로세서로 구성하고. 이 마이크로프로세서에게 조작안내차 자기진단 기능도 타당하도록 한다. 끝으로, 모델 시스템의 제어반을 실세로 제작하구 실험을 한다 그 결과, 제각반을 마이크조프로세서로 구성하면 인터럽트 중심의 논리회로로 구성하는 경우에 비하여 주메모리의 실질적인 ROM용량은 증가되고, 구성소자의 수나 프린트기판의 면적은 감소되며 신환도는 향상된다는 등의 결론을 얻는다.

• 한국군사과학기술학회지
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• 제25권5호
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• pp.522-529
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• 2022

In this paper, an experimental study on the control of the plume deflection panel(PDP) with a support jack of the ground launching platform using a tilt angle sensor is described. To overcome the disadvantages of the existing PDP control without a support jack using a limit sensor, the control algorithm using a tilt angle sensor and the ferroelectric RAM in the Launcher Control Unit for recognizing the contact with the ground in an abnormal operation is proposed to control the PDP in various operation environments. Finally, the proposed algorithm can be well applied for not only heavy-load launching platforms but also any other similar systems.