• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2008년도 춘계학술대회 논문집
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• pp.374-377
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• 2008

Magnesium alloy sheets are usually formed at temperatures between $150^{\circ}C$and $300^{\circ}C$ because of their poor formability at room temperature. In the present study, the formability of AZ31B magnesium alloy sheets was investigated by the analytical and experimental approaches. First, tensile tests and the limit dome height test were carried out at elevated temperatures to get the mechanical properties and forming limit diagram, respectively. And then deep drawing of cross shaped die was tried to get the minimum corner radius and forming limit at specific temperature. Blank shape, punch velocity, minimum corner radius, fillet size, etc, were determined by finite element analysis physical try-outs. Especially, optimum punch and die temperature were suggested through the temperature-deformation analysis using Pam-stamp.

• 한국수학사학회지
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• 제22권2호
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• pp.81-98
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• 2009

확률은 현실 문제나 과학적인 문제의 해결을 위한 중요한 사고도구로 현대 사회에서 매우 중요한 역할을 하고 있다. 그런데 선행연구에서 확률은 학생들이 이해하는데 많은 어려움을 나타내며 현실과 단절된 계산 체제로 지도되는 문제를 많이 지적한다. 이에 이 글에서는 중학교에서 확률을 처음 다루는 2학년 교과서에서 확률의 계산 중 두 사건이 동시에 일어날 확률 계산을 지도하는 방식과 현실에 기반하여 실생활이나 과학적인 문제 해결의 도구로 확률이 사용되는 방식을 면밀히 살펴보려고 한다. 이로부터 현재 우리 나라 교과서의 확률 지도방식의 특징과 논의점을 끌어내고자 한다.

• 정보관리연구
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• 제33권2호
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• pp.1-17
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• 2002

본 연구는 이용자 인터페이스 설계 원칙과 평가방법에 관하여 고찰하고 관련되는 사례를 검토하였다. 제품 개발에 중요한 이용자 인터페이스 설계 원칙으로 1) 이용자와 작업 중심의 설계, 2) 기능성 중심의 설계, 3) 이용자 관점에서 설계, 4) 이용자가 작업 수행을 간단, 명료하게 진행하도록 설계, 5) 배우기 쉬운 인터페이스 설계, 6) 단순 데이터가 아닌 정보를 전달하는 인터페이스 설계, 7) 적절한 피드백을 제공하는 인터페이스 설계, 8) 이용자 테스트를 통한 설계보완 등이 있다. 또한 이 논문은 설계 원칙과 평가방법을 소개하기 위한 기초조사로 인간-컴퓨터 상호작용과 관련된 문제들에 대해서도 기술하였다.

• 기본간호학회지
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• 제5권2호
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• pp.196-206
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• 1998

The purpose of this study was to find out the prevalence of urinary incontinence, it's relating factors and the level of self-esteem in women. Subject of this study consisted of 153 in the age of 30-55 years old living in around Iksan. The date were collected from March, 1998 to June, 1998 with interview using structured questionare and were analysed with SPSS program. The results were as follows : 1) The prevalence of urinary incontinence is 85%. The most common amount of urinary incontinence was somewhat small expressed as 'wetting their panty' 2) The common factors related to the urinary incontinence were coughing, sneezing, laughing loudly, the activities of need for hurry and constipation. The older, the more incidence of urinary incontinence were reported. 3) Only 50% of epsodic urinary incontinence were treated and they wanted to try the herb medicine(64%), taking medicine(8%) and exercise(3%). 4) There was significant between self-esteem and urinary incontinence (T=13.83, p=.000), but between degree of urinary incontinence and self-esteem were not significant(F=.71, p=.55). In conclusion, urinary incontinence will be very serious health problem as aging so that it's Important to provide nursing intervention to prevent and be well. It need to support psychological care, too.

• 한국환경교육학회지:환경교육
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• 제21권3호
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• pp.1-12
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• 2008

This study is aimed at suggesting ways to develop field trip or learning materials focusing on environment of Jeju seashore in order to make an effective field trip. To perform these purposes, the contents and concepts were analyzed from environment-related 'geological unit' of elementary science textbook. Afterwards, the places having the geological features in coincidence with them are chosen, and investigated, and these regions can develop into geological teaming places for field trip. Each teaming spot focuses on understanding and finding out the characteristic geological environment of rock shore, gravel shore, sand shore, shellfish shore, and tideland shore among Jeju shores. When field trip is conducted at the preparatory stage, students can get advance knowledge on geological concepts from textbook. The activity record paper is presented at the field trip stage where students observe geological phenomena on their own. After field trip is finished, the summary stage is given to solve some problems on the basis of the observed contents. The developed data from this research have its regional limits, but is surely useful for teachers who try to plan field trip when they especially choose the right field trip spots, or plan to make the process for field trip preparation of the environmental education. Furthermore, with this survey and activities, students can take the chance to improve the learning effect through their own experience on environment of Jeju seashore.

• Nuclear Engineering and Technology
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• 제41권9호
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• pp.1157-1170
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• 2009

A variety of Generation III/III+ reactor designs featuring enhanced safety and improved economics are being proposed by nuclear power industries around the world to solve the future energy supply shortfall. Nanofluid coolants showing an improved thermal performance are being considered as a new key technology to secure nuclear safety and economics. However, it should be noted that there is a lack of comprehensible design works to apply nanofluids to Generation III+ reactor designs. In this work, the review of accident scenarios that consider expected nanofluid mechanisms is carried out to seek detailed application spots. The Axiomatic Design (AD) theory is then applied to systemize the design of nanofluid-engineered nuclear safety systems such as Emergency Core Cooling System (ECCS) and External Reactor Vessel Cooling System (ERVCS). The various couplings between Gen-III/III+ nuclear safety features and nanofluids are investigated and they try to be reduced from the perspective of the AD in terms of prevention/mitigation of severe accidents. This study contributes to the establishment of a standard communication protocol in the design of nanofluid-engineered nuclear safety systems.

• 유통과학연구
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• 제19권11호
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• pp.49-57
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• 2021

Purpose: In this study, we try to figure out the appropriate size of commercial districts in the original downtown area through empirical studies targeting the Jinju Central Commercial Area in Gyeongnam and Cheonan Station in Chungnam, which are trying to regenerate a specific space that has been lost through government projects. Research design, data and methodology: The current status and characteristics of the shopping district were examined through on-site surveys of the central business district of Jinju, Gyeongnam Province, and Cheonan Station, Chungnam Province, and the size of the empty stores was determined. In addition, the standard median income was used as the survey data along with the survey of the mobile population in the commercial area. Result: The analysis result shows that 883 stores should be maintained considering the overall expenditure and gross sales profit within Cheonan Station in South Chungcheong Province. Currently, considering spending and margins in the Commercial Area, Jinju Central Commercial Area is a place where 222 stores can be sold excessively, and a proper commercial supply plan is needed. Conclusions: In this study, we conducted a demand prediction study in the commercial sector of the most basic sector to regenerate the commercial sector through major regional commercial districts.

• 공학교육연구
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• 제24권2호
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• pp.51-60
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• 2021

Although more than 15 years have passed since the introductory design courses were opened due to the introduction of engineering education certification in the civil engineering field, these courses have been operated somewhat unsatisfactorily compared to their importance as an introductory course for engineering design. This is partially because the quality of classes is affected by the instructor's individual ability due to the fact that a standard training plan for these courses has not been established so far. Therefore, in this paper, we try to present a reference model for the introductory design course by introducing a class operation case established through continuous improvement process over the last 10 years at Chungbuk National University. This case aims to cultivate students' problem solving and system design skills by carrying out projects to develop egg drop and wood bridge systems based on creative problem solving methodologies. As a result of a questionnaire survey conducted after the class, we found that students' problem solving and system design capabilities were improved significantly and there was a meaningful increase in level of interest and attention in civil engineering by taking this class.

• 철학연구
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• 제116호
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• pp.105-128
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• 2017

이 글은 황재형의 작품세계를 예술공간의 미메시스적 재구성이라는 프레임으로 읽어보려고 시도한다. 나는 황재형의 작품이 품고 있는 세계가 그 자신의 주관적 경험으로 환원되지 않는 공간으로 구성되어 있다고 생각한다. 작품 속의 공간은 황재형 작가가 음악적으로 사태에 동화되는 과정, 곧 미메시스를 통해 재구성한 세계로 읽힌다. 이런 읽기를 위해 나는 먼저 빛과 어둠의 교차로에서 그의 작품과 소통하는 길을 찾고자 한다(2). 이 길에서 미메시스적 반응으로 재구성된 황재형 작품의 예술 공간 안팎을 넘나들다가(3), 시간을 품은 공간을 통과해(4) 길 밖으로 나온다(5).

• 자동차안전학회지
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• 제10권4호
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• pp.40-49
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• 2018

Currently, a lot of researches about high risk test scenarios for autonomous vehicle and advanced driver assistance systems have been carried out to evaluate driving safety. This study proposes new type of test scenario that evaluate the driving safety for autonomous vehicle by reconstructing accident database of national automotive sampling system crashworthiness data system (NASS-CDS). NASS-CDS has a lot of detailed accident data in real fields, but there is no data of accurate velocity in accident moments. So in order to propose scenario generation method from accident database, we try to reconstruct accident moment from accident sketch diagram. At the same step, we propose an accident of occurrence frequency which is based on accident codes and road shapes. The reconstruction paths from accident database are integrated into evaluation of simulation environment. Our proposed methods and processor are applied to MILS (Model In the Loop Simulation) and VILS (Vehicle In the Loop Simulation) test environments. In this paper, a reasonable method of accident reconstruction typology for autonomous vehicle evaluation of feasibility is proposed.