• 영재교육연구
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• 제18권1호
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• pp.139-165
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• 2008

본 연구는 과학영재들을 위한 지구과학 영역 해파 실험 모듈을 개발하고 그 활용가능성에 대해 알아보고자 하였다. 과학영재들을 위한 해파 실험 모듈은 참여, 탐색, 설명, 정교화 및 확장 등 5단계로 구성된 특징을 가지고 있다. 실험 모듈의 교육적 효과를 알아보기 위하여 대전광역시교육청 지정 영재교육원 교육생으로 고등학교 10학년에 재학 중인 16명의 영재들을 대상으로 연구를 수행하였다. 수업 중의 연구보고서를 바탕으로 과학탐구능력과 사전 사후 검사에 의한 지식성취토의 변화를 분석하였다. 그 결과 변인 통제, 실험 설계, 실험과정 중의 도구의 선택과 활용 측면에서 효과적인 것으로 나타났으며, 지식 성취도에 있어서도 효과적인 것으로 나타났다. 본 연구의 결과로부터 과학영재를 위한 실험 모듈의 활용은 과학성을 기르기에 매우 유의미하며, 과학영재들의 적합한 다양한 실험모듈의 개발과 활용이 필요하다고 하겠다.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
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• pp.184-189
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• 2008

The excess heat that is generated from PV modules can be removed and converted into useful thermal energy. A photovoltaic/thermal(PVT) module is a combination of photovoltaic module with a solar thermal collector, forming one device that converts solar radiation into electricity and heat simultaneously In general, two types of PVT can be distinguished: glass-covered PVT module, which produces high-temperature heat but has a slightly lower electrical yield, and uncovered PVT module, which produces relatively low-temperature heat but has a somewhat higher electrical performance. In this paper, the experimental performance of water type unglazed PVT combined module, analyzed. The electrical and thermal performance of the module were measured in outdoor conditions, and the results are analyzed. The results showed that the thermal efficiency of the PVT module was 27.05% average and its PV efficiency was about 11.85% average, both depending on solar radiation, inlet water temperature and ambient temperature.

• 한국태양에너지학회:학술대회논문집
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• 한국태양에너지학회 2011년도 춘계학술발표대회 논문집
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• pp.121-126
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• 2011

The heat from PV modules should be removed for better electrical performance, and can be converted into useful thermal energy. A photovoltaic-thermal(PVT) module is a combination of PV module with a solar thermal collector which forms one device that converts solar radiation into electricity and heat simultaneously. In general, there are two different types of PVT module: glazed PVT module and unglazed PVT module. On the other hand, two types of the PVT module can be distinguished according to absorber on PV module rear side: the sheet-and-tube absorber PVT module and the fully wetted absorber PVT module. In this paper, the experimental performance of water type unglazed PVT with fully wetted absorber was analyzed. The electrical and thermal performance of the unglazed PVT were measured in outdoor conditions, and the results were analyzed. The experimental results showed that the thermal efficiency of the PVT module was 42% average, and its electrical efficiencies were 15.2% and 14.2% average, respectively, for the mean fluid temperature of $10-20^{\circ}C$ and $21-30^{\circ}C$. Thermal efficiency depends on solar radiation, mean fluid temperature and ambient temperature. The PVT module temperature is related to the cooling effect of the PV module by the fluid of the absorber. The results proved that the electrical efficiency was higher when the mean fluid temperature was lower.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 추계학술대회논문집
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• pp.403-408
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• 2007

According as diesel automobile are produced, reduce noise and vibration that is occurred by characteristic of diesel engine, and need engine room layout optimization and research for light weight of parts. Balance Shaft Module is module parts for vehicles engine to improve performance and efficiency of engine and reduce noise and vibration. These days, an oil pump integrated balance shaft module and an oil sump integrated balance shaft module is on the rising for optimizing of engine room. In this study, produced prototype of oil pump integrated type balance shaft module, and achieved dynamic characteristic test about experimental modal analysis and noise/vibration of balance shaft module.

• Perspectives in Nursing Science
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• 제9권2호
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• pp.136-145
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• 2012

Purpose: The purpose of this study was to verify the educational effectiveness of the Objective structured clinical examination (OSCE) module development activities on nursing students in the areas of performance skill, knowledge, self-directed learning readiness, and problem solving ability for medication skill. Methods: This study was a nonequivalent control group non-synchronized post-test design. The subjects (N=47), who agreed to participate in this study, were assigned to either the experimental (n=24) or control group (n=23). The experimental group was trained with OSCE module development activities for four days. The control group was trained with a traditional demonstration and practice class for the same amount of time as the experimental group. Medication performance skill and knowledge tests and surveys were done to measure self-directed learning readiness, and learning satisfaction after the experimental treatments. Results: The experimental group which participated in the OSCE module development activities showed significantly higher performance skill, self-directed learning readiness, and problem solving ability for skin test and insulin medication than that of the control group of traditional education. Conclusion: It is recommended to use the OSCE module development activities for nursing students in nursing education-learning in order to improve nursing skills.

• 과학교육연구지
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• 제35권2호
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• pp.204-220
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• 2011

이 연구는 초기 광합성 연구자의 탐구 과정을 재구성하여 중학생들의 과학탐구능력과 광합성 관련 개념의 향상을 위한 실험 모듈을 개발한 후, 이의 적용 효과를 알아보고 광합성과 관련된 학생들의 선행 개념 유형과 개념 변화의 패턴을 분석하고자 하였다. 실험재료로는 Rapid-cycling Brassica rapa 라는 속성식물을 사용하였다. 개발된 모듈을 적용한 실험반의 수업은 교과서에 제시된 실험을 적용한 통제반의 수업에 비해 학생들의 과학탐구능력 향상에 효과적이었으며, 과학탐구능력의 하위 요소 중에서 측정, 예상, 가설 설정 능력의 향상에 효과적이었다. 실험반의 사전-사후 검사 결과를 비교해 본 결과, 관찰, 예상, 일반화 능력의 향상에 더욱 효과가 있는 것으로 나타났다. 개발된 모듈은 광합성 관련 개념 성취 및 생태계내에서의 식물의 역할, 식물의 먹이, 식물체 내에서 물과 양분의 이동과 관련된 개념 발달에 효과가 있었다. 학생들은 선행 개념으로 이산화탄소나 산소와 같이 눈에 보이지 않는 물질의 존재나 역할 또는 에너지의 축적과 같은 추상적 개념에 대한 이해가 부족한 것으로 나타났으나, 이 연구에서 개발된 모듈을 적용한 결과 유기물과 산소 생산자인 식물의 역할에 대한 포괄적인 개념 발달에 효과가 있었으며, 과학탐구능력과 광합성 관련 개념의 향상에 효과가 있었다.

• 설비공학논문집
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• 제16권1호
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• pp.62-69
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• 2004

Thermoelectric module is a device that can produce cooling in a direct manner using the electrical energy. The purpose of this study is to investigate the performance of thermoelectric module and cooling system equipped with the thermoelectric module. The performance of a thermoelectric module is estimated using two methods; theoretical analysis based on one-dimensional energy equations and experimental tests using heat source, heat sink and brass conduction extenders. For the thermoelectric cooling system, the temperatures in the chamber are recorded and then compared with those of lumped system analysis. The results show that the cooling capacity and COP of the thermoelectric module increases as the temperature difference between hot and cold surface decreases, and there is particular current at which cooling capacity reaches its maximum value. The experimental results for the thermoelectric cooling system are similar to those of lumped system analysis.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.1201-1206
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• 2003

A measurement device for gas flow rate using hot-wire module is developed for the utilization in low-accuracy industrial applications. The module has three wires of measuring and heating, and a bridge circuit is installed to detect electric current through the wire in the module. An amplification of the signal and conversion to digital output are conducted for the online measurement with a personal computer. In addition, temperature distribution in the module is numerically analyzed to examine the measured outcome from the module experiment. The flow rate of air and carbon dioxide gas is separately measured for the performance examination of the device. The experimental relation of measurement and flow agrees with the prediction from the numerical analysis. The outcome of the performance test indicates that the accuracy and reproducibility of the module is satisfactory for the purpose of industrial applications.

• 한국수소및신에너지학회논문집
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• 제15권4호
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• pp.341-347
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• 2004

An experimental study has been carried out on cooling perfonnance of a thennoelectric module. This problem is of particular interest in the design of the refrigeration systems using thermoelectric module, such as cosmetic refrigerator, wine cellar and air cooler. The effect of the input voltage and the hot side temperature on the cooling performance is studied in detail. The $\Delta$T, temperature difference between cold side and hot side surface of thermoelectric module, is described in terms of the input voltage and the hot side temperature. It is found that the cooling capacity can be improved by increasing the input voltage and by reducing the heat from the hot side of the thermoelectric module. However, COP is decreased with an increase in the input voltage, since power consumption is also increased. Thus, optimum input voltage can be selected based on cooling capacity and COP.

• 설비공학논문집
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• 제20권4호
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• pp.260-265
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• 2008

The excess heat that is generated from PV modules can be removed and converted into useful thermal energy. A photovoltaic/thermal (PVT) module is a combination of photovoltaic module with a solar thermal collector, forming one device that converts solar radiation into electricity and heat simultaneously. In general, two types of PVT can be distinguished : glass-covered PVT module, which produces high-temperature heat but has a slightly lower electrical yield, and uncovered PVT module, which produces relatively low-temperature heat but has a somewhat higher electrical performance. In this paper, the experimental performance of water type PVT combined module, glass-covered, analyzed. The electrical and thermal performance of the module were measured in outdoor conditions, and the results are analyzed. The results showed that the thermal efficiency of the PVT module was 27.6% average and its PV efficiency was about 10.0% average, both depending on solar radiation, inlet water temperature and ambient temperature.