• Journal of the Korean Physical Society
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• 제80권
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• pp.1-12
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• 2022

Over the past few decades, tetrafluoroethane (TFE, R134a Freon)-based gases have been widely used in the operation of phenolic resistive plate chambers (RPCs) in many high-energy experiments. However, TFE has a high global warming potential (GWP); therefore, a search for new eco-friendly gases to replace traditional TFE-based ones is now unavoidable. In this research, we present cosmic-ray test results of a prototype RPC for the SHiP (search for hidden particles) experiment using 1.6- and 1.4-mm-thick RPC electrodes containing mixtures of various gases, including 1,3,3,3-tetrafluoropropene (HFO1234ze), CO₂, iC₄H₁₀ and SF₆. We compare the performance data gathered with these new gas mixtures with those gathered with a traditional TFE-based gas used for RPCs in compact muon solenoid (CMS) and a toroidal LHC apparatus (ATLAS) experiments. The addition of CO₂ to the HFO1234ze-based gas was found to be fairly effective in reducing the working-point high voltage (HVWP) for RPC operation. The results of our experiments lead us to the conclusion that adding 40% CO₂ or less, when combined with HFO1234ze-based gas, is conducive to reliable detector performance for SHiP single-gap phenolic RPCs.

• 실천공학교육논문지
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• 제9권2호
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• pp.139-148
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• 2017

사물과 컴퓨터의 연결이 쉬워지면서 피지컬 컴퓨팅을 활용한 학습은 초보자들을 대상으로 하는 프로그래밍 교육에 있어 제기되는 문제점들을 보완하기 위한 좋은 대안으로 제시되고 있다. 본 논문에서는 초보자들을 위한 기초 프로그래밍 강좌에 적용할 수 있는 교육방법을 제안한다. 이를 위해, 피지컬 컴퓨팅 방식으로 기초 프로그래밍 강의를 진행한다. 현재 피지컬 컴퓨팅 강좌들은 대부분 다양한 입력 센서 연결방법과 출력장치 제어에 초점이 맞추어져 있다. 그러나, 피지컬 컴퓨팅 재료들을 이용한 프로그래밍 교육 내용은 그 사례가 부족하다. 이에 본 논문에서는 피지컬 컴퓨팅에 사용되는 저가의 재료들을 이용하여, 프로그래밍 교육에 활용한 교육 방법을 제안하고 시험하였다.

• 공학교육연구
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• 제17권4호
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• pp.7-14
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• 2014

This study was conducted for the purpose of developing a basic-level TRIZ curriculum to improve students' creativity and problemsolving abilities. Towards this end, literature review, field application study, and a survey on the demand for such curriculum were conducted, as the research methodologies. Specifically, literature review was performed on the TRIZ-related research trends and education trends, and the researchers, who had experience running a TRIZ education program for a few years, ran a basic-level TRIZ for 40 hours as part of the extra-curriculum of A University. An actual survey was also conducted to determine the demand for the development of a basic-level TRIZ curriculum. Of the total of 40 students who were subjected to the curriculum, 31 responded sincerely 1 to the survey. Based on the survey analysis results on the students' recognition of the TRIZ curriculum and of the TRIZ task performance, and on the contents and educational effects of TRIZ, basic guidelines for the development of a basic-level TRIZ curriculum were formulated. Reflecting the results of the survey on the demand for a basic-level TRIZ curriculum, such a curriculum was proposed based on 16-week-long, 3-credit lectures considering the curricula of other subjects in the university.

• 한국운동역학회지
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• 제24권3호
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• pp.201-207
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• 2014

This study investigated the center of mass and lower extremity kinematic patterns between carved and basic paralell turn during alpine skiing. Six experienced skiers (age: $20.67{\pm}4.72yrs$, body mass: $72.67{\pm}7.15kg$, height: $171.00{\pm}5.51cm$) participated in this study. Each skier were asked to perform carved and basic paralell turn on a $22.95^{\circ}$ groomed slope. Each turn was divided into the initiation phase, steering phase 1 and 2. The results of this study show that the carved turn spent significantly less running time than basic paralell turn at all three phases (p<.05). Also vertical displacement of the center of mass was significantly greater in carved turn at all three phases, whereas inward leaning angle of the center of mass was significantly greater in carved turn at the steering phase 1 and 2 (p<.05). Bilateral knee and hip joint angle were significantly greater in basic paralell turn at the initiation phase and the steering phase 2 (p<.05). On the other hand, left knee and hip joint angle were significantly greater in basic paralell turn at the steering phase 1 (p<.05). In order to perform successful carved turn, we suggest that skiers should coordinate bilateral knee and hip joint angles to adjust the center of mass, depending on three ski turn phases.

• 공학교육연구
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• 제15권5호
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• pp.119-124
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• 2012

The influences of the basic academic skills to the scholastic achievement grades has been researched and we made a test of the basic academic skills(Korean language, mathematic, foreign language) to the students of engineering department in I college in Seoul and analyzed the correlation between the basic academic skills and the scholastic achievement grades. Results show that the scholastic achievement grades has a correlation(r=.456, p<0.01) to the average grade of the basic academic skill test. High level students of the scholastic achievement grades have a correlation(r=.292, p<0.01) to the mathematical department and the others have a correlation(r=.232, p<0.05 and r=.279, p<0.01) to the Korean linguistic department. The results of this study through multiple regression analysis indicate that the scholastic achievement has a relation on Korean language skill. As a result, It is recommendable that the mathematical basic academic skill programs are suggested to the high-level students of the scholastic achievement grades and the linguistic basic academic skill programs to the others. Also, the required basic linguistic subject is needed to the low-level students of the basic academic skills and in this paper, we propose the test and management system for the basic campus-life skills including the basic academic skills and the basic major skills.

• 한국운동역학회지
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• 제21권1호
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• pp.85-95
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• 2011

Three-dimensional(3D) motion analysis is a useful tool for analyzing sports performance. During the last few decades, advances in motion analysis equipment have enabled us to perform more and more complicated biomechanical analyses. Nevertheless, considering the complexity of biomechanical models and the amount of data recorded from the motion analysis system, subsequent processing of these data is required for event-specific motion analysis. The purpose of this study was to develop a basic golf swing analysis algorithm using a state-of-the-art VICON motion analysis system. The algorithm was developed to facilitate golf swing analysis, with special emphasis on 3D motion analysis and high-speed motion capture, which are not easily available from typical video camera systems. Furthermore, the developed algorithm generates golf swing-specific kinematic and kinetic variables that can easily be used by golfers and coaches who do not have advanced biomechanical knowledge. We provide a basic algorithm to convert massive and complicated VICON data to common golf swing-related variables. Future development is necessary for more practical and efficient golf swing analysis.

• 공학교육연구
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• 제14권5호
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• pp.10-13
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• 2011

The 7th National Education Process, implemented in 2004, features student-oriented, selective educational programs with a wide range of optional subjects. In 2005, reflecting this revised National Education Process, the College Scholastic Ability Test began allowing individual students to choose the subjects for examination they would like to take. As a result, the deviations of the college freshmen's academic achievements in some subjects have noticeably widened. This study shows academic abilities of the students on some subjects by comparing the results of 2008 College Scholastic Ability Test with that of the Basic Academic Ability Evaluation Test for freshmen in engineering college of Hongik university. Lastly, this paper presents some improvement plans in order to better accommodate students with academic achievement levels lower than what is expected by the university.

• 한국수학교육학회지시리즈E:수학교육논문집
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• 제24권3호
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• pp.525-541
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• 2010

P대학에서는 교양수학 교과에 대한 기초학력 부진학생들의 문제해결력 향상을 위하여, 대학 교육역량강화사업의 일환으로 수학카페 운영과 함께, 기초수학 특강, 개인지도 및 컴퓨터 활용학습 등을 시행하고 있다. 본 논문에서는 여름 및 겨울방학을 이용하여 기초수학 특강을 실시하고, 그 결과를 중심으로 수학에 대한 기초학력 부진학생들을 위한 효율적인 기초수학 학습지도 방안을 살펴보고자 한다.

• 한국수학교육학회지시리즈D:수학교육연구
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• 제8권3호
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• pp.123-144
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• 2004

There is a tradition of advocating the 'two basics' (basic knowledge and basic skills) in Chinese mathematics education. The direct consequence is that Chinese students are able to produce excellent performance in the international mathematics examinations and outstanding results in the international mathematics competitions. In this article, we will present why and how Chinese teachers teach the 'two basics,' and how combine the pupil's creativity with their 'two basics.' Open ended problem solving is a way to meet the goal. The following topics will be concerned: Culture background; the speed of computation; 'make perfect' ; Efficiency in classroom; Balance between 'two basics' and personal development. In Particular, Chinese mathematics educators pay more attentions to the link between open ended problem solving and the 'two basics' principal.

• 한국가구학회지
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• 제25권3호
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• pp.165-172
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• 2014

3D form study is one of basic subjects in industrial design education. There are an array of textbooks of visual art, design and architecture, most of which address basic geometrical form study and abstract forms. With the introduction of computerization, current trends are directed to reduce basic form education and students' participation in classes and their accomplishments. This study was intended to develop works under a theme of furniture design with concrete shapes and functions. This study focused on developing relevant process by fusing 3D form study and furniture design which fall into basic design and design studio subjects, respectively. Among 3D form studies, applied were a concept of 3D configuration that explores the relations between surface forms and 3D forms. Furniture design is a challenge to students at beginner or intermediate level in basic design education from initial devising stage to production in kind. To ease high level of difficulties at designing and producing stages, technical education was systematized in the process of conceptualizing, developing idea and production. This type of challenge was carried out during separate semesters, along with a case study done to develop different types of challenges. This study helped students to be motivated and actively participate in classes and well perform advanced form study and technical training from design to actual production.