• Nuclear Engineering and Technology
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• 제54권7호
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• pp.2564-2571
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• 2022

SiPMs are generally coupled into whole columns in gamma energy spectrum measurement, but the relationship between the distribution of whole SiPM columns and the energy resolution of the measured energy spectra is rarely reported. In this work, ∅ 3 × 3 inch NaI scintillator is placed on an 8 × 8 SiPM array, and the energy resolution of the ¹³⁷Cs peak at 662 keV corresponding to the γ-ray is selected as a reference. Each SiPM is switched to explore the influence of the number of SiPM arrays, distribution position, and reflective layer on the energy resolution of SiPMs. Results show that without coupling, the energy resolution is greatly improved when the number of SiPMs ranges from 4 to 32. However, after 32 slices (the area covered by SiPMs relative to the scintillator reaches 25.9%), the improvement in energy resolution and total pulse count is not obvious. In addition, the position of SiPMs relative to the scintillator does not exert much impact on the energy resolution. Results also indicate that by adding a reflective film (ESR), the energy resolution of the tested group increases by 10.38% on average. This work can provide a reference for the design and application of miniaturized SiPM gamma spectrometers.

• 공학교육연구
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• 제20권2호
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• pp.19-30
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• 2017

This paper investigated how three representative domestic and international engineering education journals explored societal supports contributing to retention and persistence in engineering, especially among women. An integrative literature review of engineering education journals was carried out to identify the flow of research and practice of engineering education for females. The findings indicate that retention and persistence of women in engineering is closely relevant to issues of diversity management, collaboration competency, and self-leadership.

• 한국농촌건축학회논문집
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• 제10권2호
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• pp.71-78
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• 2008

It is true that the social welfare center influences on the community service. The recent change of social environment has influence on the configuration of space for the community social welfare center. The social welfare center fills the role of family welfare, domiciliary care, community welfare, education culture etc. Education culture magnified, and it is acting role as the community education culture center by various program including cultural desire according to the modern request to the whole local resident. In such sense, this study explore the conditions of spatial configuration for the education culture unit of social welfare center in small city. For this study, it was investigated the space role and service funtion, the service program, the usage characteristics, the service importance. In sum, the useful data were collected, analyzed, and colligated by case study. Case study and analysis contents about education culture unit of social welfare center present the basic design data for the space plan of suitable social welfare center in small city.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2008년도 Asian Magnetics Conference
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• pp.46-46
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• 2008

• 정보교육학회논문지
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• 제22권1호
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• pp.123-130
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• 2018

본 연구의 목적은 G지역 지역아동센터를 대상으로 찾아가는 SW 놀이터 프로그램을 운영하면서 아동센터 학생들이 SW 교육에 대한 인식의 변화를 통해 SW 교육에 대해 흥미를 붙이고 학습해 나가는 과정을 살펴보고자 하였다. 지역아동센터내의 학생들은 학년과 나이가 다양하므로 수준별 교육과정과 교수학습 과정안을 제시하였다. 그 결과 SW 교육에 대한 학생들의 태도와 만족도가 높아졌고, 소외계층을 위한 교육 프로그램이 절실히 필요함을 알 수 있었다.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
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• pp.156.1-156.1
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• 2007

• 한국통신학회:학술대회논문집
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• 한국통신학회 2006년도 하계종합학술발표회 논문 초록집
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• pp.713-713
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• 2006

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2000년도 종합학술발표회 논문집 Vol.10 No.1
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• pp.225-228
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• 2000

In this paper, the design for a low noise amplifier with the EM simulation is presented. The ATF36077 pHEMT device is applied to design LNA for U-NII frequency band (5 GHz ～ 6 GHz). The matching networks have been designed by the only open ended stub in order to reduce parasitic effects generated from a via structure. Through EM simulator, the simulation result shows that the linear gain (@5.5 GHz) is over 10 dB, input return loss and output return loss (@ 5.5 GHz) are a below 10 dB respectively, and the 3rd order intercept point is about 17 dBm.

• 한국자기학회:학술대회 개요집
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• 한국자기학회 2007년도 The 1st International Symposium on Advanced Magnetic Materials
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• pp.102.1-102.1
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• 2007

• 한국보육지원학회지
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• 제14권1호
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• pp.227-248
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• 2018

Objective: The purpose of this study was to investigate the recognition and qualities of early childhood coding education in childcare center teachers. Methods: 158 childcare center teachers responded to 56 questions on a questionnaire extracted and revised from previous research. Frequency analysis and one-way ANOVA were applied for the data analysis. Results: Many teachers agreed that the software education policy was timely appropriate. Most of them needed the education in order to improve children's creativity and problem solving ability, and answered that it is appropriate to start the education at age 5. Most of them recognized that small group and free choice activities, play activities linked with daily life topics and coding programs by the childcare center teachers were desirable as educational methods. Provision of educational HW/SW environment was a relatively important element for effective implementation of the education. The coding educational qualities perceived by the teachers were not high, and were related to the age of the children they were in charge of and their computer literacy. Conclusion/Implications: The recognition of childcare center teachers was relatively positive, but it is necessary to educate the teachers to improve their recognition and qualities of the education in consideration of teachers' variables.