• 한국실천공학교육학회논문지
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• 제1권1호
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• pp.1-6
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• 2009

전통적으로 엔지니어의 역할은 주로 주어진 문제를 해결하는데 집중되어 왔으며, 공학교육 역시 문제해결에 초점을 맞추는 경향이 있었다. 따라서 문제를 철저히 분석하여 진짜문제를 정의하는 과정을 소홀히 하고, 쉽게 인식된 문제를 자신의 경험과 지식만으로 해결하려고 시도함으로써 많은 시행착오를 초래하게 된다. 이런 관점에서 문제해결에 앞서 진짜 문제를 정확히 정의하는 능력이 엔지니어에게 절실히 요구되고 있다. 본 연구에서는 시행착오를 최소화하면서 진짜문제를 효율적으로 정의할 수 있도록, 핵심영역의 도식화와 트리즈의 모순 및 이상해 개념 등을 이용해서 진짜문제 정의 프로세스를 제안하였다. 트리즈는 1946년부터 러시아의 기술자이자 과학자인 알트슐러가 정립한 창의적 문제해결 이론으로, 현재 많은 산업 분야에서 널리 활용되고 있으며, 이미 많은 분야에 적용되어 그 효율성이 증명된 이론이다. 따라서 공학교육에서 트리즈를 활용하는 것은 학생들의 창의적 사고력 개발 측면에 있어서도 매우 유용할 것으로 판단된다.

• 한국정보통신학회논문지
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• 제19권6호
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• pp.1277-1282
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• 2015

본 논문은 국가직무능력표준(NCS)기반 국가기술자격검정의 정보처리분야 실기시험 평가방법 개선을 목적으로 수행된 연구에 대한 내용을 기술한 것이다. 현행 정보처리분야의 실기시험의 내용을 체계적으로 분석한 후 최신 정보기술 동향을 반영하고 국가직무능력표준의 능력단위, 수행준거 등을 접목하여 정보기술 분야 실기시험의 새로운 평가방법을 제시하였고, 시범평가를 통해 그 효과를 검증하였다. 향후 한국산업인력공단 기술자격출제실에서는 본 연구를 기초로 세부직무분야 전문가를 통한 출제 기준 개정을 완료 한 후 정보처리분야 국가기술자격검정에 실제 적용할 예정이다.

• 한국항해학회지
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• 제14권3호
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• pp.63-73
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• 1990

Students of the Mogpo Merchant Marine College must complete one year's shipboard training course according to IMO(International Maritime Organization) regulations as an obtaining matter of Certificate of Competency. The purpose of this shipboard training course lies int he student's acquiring practical knowledge and sill as a part of a course of study and, in the future, fostering essential adaptability and leadership, especially in bad circumstances on the sea. The shipboard training course has two kind that the students can be trained either on the training ship or on a merchant ship of the shipping company. In this paper, I only thought over the legal status of apprentice officers on the merchant ship and analyzed the problems practicably during shipboard training. This paper is made up of five chapters. The first chapter contains the purpose contents and method of this study, in the second, the meaning of shipboard practice education and training, in the third, the legal status of apprentice officers on merchant ship, in the fourth, the analysis of the provisions of the seamen act applied to apprentice officers on a merchant ship. And in the last chapter 5, the contents mentioned is summarized and directions are presented to amend the provisions of the seamen act applied to apprentice officers. The conclusions are as follows. 1.In case of shipboard training on overseas employment ship, the seamen act applied to the manning agent employing the apprentice officers should be reinforced. 2. The provisions of disembarkation in mid course by discipline of the seamen acts Article 24 should be relaxed. And the provisions in relations to seamen's duty to be a reason of discipline applied to apprentice officer among the provisions for ship's public order maintenance should be abolished. 3. The provision of repartriation completely should be applied to apprentice officers and the provisions of a journey expenditure during their embarkation or disembarkation have to be established. 4. The apprentice officers in shipboard training also need securing a basic wages provision to be criterion of an accident compensation. 5. The apprentice officers in shipboard training should not be in charge of third officer's or third engineer' study.

• 한국정보통신학회논문지
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• 제21권11호
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• pp.2052-2060
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• 2017

SOLAS 선박은 SFI group 코드 기준으로 적어도 83종의 장비를 탑재해야 하고, 각각의 장비는 다시 수 개에서 수십 개의 컴포넌트로 구성이 된다. 선박 운항 중에는 이러한 장비의 정상적인 운영이 보장되어야 하고, 문제 발생시 즉각적인 수리를 위하여 원격유지보수의 요구사항이 높다. 본 연구는 항해통신장비의 원격유지보수에 적합한 장비의 분류체계를 제시하고, 적절한 데이터베이스 구조를 도출하고자 했다. 연구 결과, 선박 항해통신장비의 원격유지보수를 위하여, 장비의 분류체계는 장비의 종류, 모델, 컴포넌트로 계층화되어야 하고, 고장모드와 영향분석, 질의응답, 수리이력, 상태정보와 예방정비 등의 테이블을 장비 모델 기준으로 구축하는 것이 효과적임을 알게 되었다. 140개의 항해통신장비 모델과 750개의 컴포넌트에 대하여 데이터베이스를 구축하였고, 실질적인 효과를 평가하기 위하여 선박장비 수리전문가가 클라우드 앱을 이용하여 검색 결과의 유용성을 평가하였다.

• 한국건설관리학회논문집
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• 제19권6호
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• pp.24-33
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• 2018

중국의 건설기업은 세계시장에서 입지가 점차로 확대되고 있다. 중국의 건설기업은 중국에서 육성된 건설기술인력이 체계적인 건설공사업무를 수행하고 있다고 판단된다. 본 연구의 목적은 중국내 교육제도에 기반을 둔 중국 건설기술자격제도인 건조사와 조가공정사의 특성에 대하여 분석하고 그 시사점을 도출하고자 한다. 본 연구의 방법은 문헌조사를 기반으로 사례조사 방법론을 통하여 중국기술자격제도의 종류와 지식체계의 깊이를 분석하는 것을 중심으로 하였다. 중국의 건조사 및 조가공정사 관련 제도는 보다 구체적이고 세분화되어 있으면서 국가가 직접 관장하여 운영하고 있다. 또한 각 자격종목별 요구되는 지식체계가 구체적으로 제시되어 있어서 각 자격별로 구체적인 시험종목 및 세부과목을 어느 수준으로 요구하는지 비교적 명확하게 파악 및 분석이 가능하다. 본 연구에서 파악된 중국의 국가자격제도가 가지는 구체성, 전문성, 실용성 등의 이슈는 후속연구로서 보다 심층적으로 계속 분석하여야 할 연구의 기반을 제공하고 있다.

• 한국실천공학교육학회논문지
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• 제2권1호
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• pp.28-34
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• 2010

본 논문에서는 공학교육을 통해 학생들의 창의적 문제해결 능력을 개발하기 위해서, 트리즈 기반의 창의적 문제해결 프로세스를 제안하고, 그 가운데 특히 문제 정의 및 아이디어 창출 방법에 대해 소개하였다. 트리즈는 러시아의 알트슐러가 창안한 창의적 문제해결 이론으로, 지금까지 많은 실무에 적용되어 이미 그 우수성이 입증된 이론이다. 창의성을 방해하는 주요 요인으로 크게 심리적 타성, 지식 부족, 잘못된 문제 설정 및 모순 해결 회피를 들 수 있는데, 트리즈는 이 네 가지를 모두 해결할 수 있는 많은 해법을 제시하고 있다. 따라서 교육을 통해서 학생들의 창의적 문제해결 능력을 개발함에 있어서 트리즈를 활용하는 것이 매우 유용할 것으로 판단된다. 특히 문제정의가 잘못되면 아무리 좋은 해결안을 도출해도 시간 낭비일 뿐이며, 이런 점에서 정확한 문제정의 능력은 공학도에게 매우 중요한 능력이며, 문제해결을 위한 창의적 아이디어를 반복적으로 도출할 수 있는 능력 역시 매우 필수적이라고 할 수 있다. 본 논문에서는 특히 트리즈의 모순 개념을 활용하여 인식된 문제의 근본 원인을 분석해서 진짜 문제를 정의하고, 분리원리를 활용하여 모순을 적극적으로 해결함으로써 보다 창의적인 아이디어를 창출할 수 있는 방법에 초점을 맞추어 기술하였다.

• 천문학회보
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• 제37권1호
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• pp.52.1-52.1
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• 2012

It is often said that there is little geometrical mind in Korean history. However, a method to project the surface of a sphere onto 2-dimensional plain was applied to the representative Korean star chart or Cheonsang Yeolcha Bunyajido (天象列次分野之圖). The method, called the equi-distant polar projection, was explained in detail in ancient Chinese history book of the Tang dynasty, which was originated from older history. Another method of the Mercator projection was introduced by the famous engineer Su Song (蘇頌) of the Song dynasty. The description has quite geometrical thoughts, especially the concept of infinity or convergence appears, However, this type of sky projection method was not widely used in east Asia. When the European Jesuits came to China to evangelize the Chinese people, they found that the Chinese people paid much attention to advanced European astronomical knowledge. Thus, they introduced the European astronomical knowledges into China, and the star chart was one of them. The projection method of the new charts were quite different from the Chinese tradition. When the Koreans brought those new star chart from China, they must have known the geometrical description of the method. The method was described in detail in a volume of Chongzhen Lishi (崇禎曆書) or Xiyang Xinfa Lishu (西洋新法曆書). The explanation consists of three part. One is the quantitative way; another is a geometrical way using axiomatic systems; and the other is the practical method to draw star chart with the geometical projection. However, when we see the Honcheon Jeondo (渾天全圖) that is thought to be duplicated by Kim Jeongho (金正浩), the new geometrical method was not so widely known to the Koreans. I will discuss the reason why the geometrical minds have not been widely adopted in the Korean civilization.

• 한국공간구조학회논문집
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• 제17권4호
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• pp.85-92
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• 2017

Base isolation system is generally used for low-rise buildings. For high-rise buildings subjected to earthquake loads, a mid-story isolation system was proposed and applied to practical engineering. In this study, seismic responses of high-rise buildings considering the installation story of the mid-story isolation system were evaluated. To do this, the 20-story and 30-story building were used as example structures. Historical earthquakes such as Kobe (1995), Northridge (1994) and Loma Prieta (1989) earthquakes were employed applied as earthquake excitations. The installation location of the mid-story isolation system was changed from the bottom of the $1^{st}$ floor to the bottom of the top floor. The seismic responses of the example building were investigated by changing the location of the isolation layer. Based on the analytical results, when the seismic isolation system is applied, story drift ratio and acceleration response are reduced compared to the case without the isolation system. When the isolation layer is located on the lower part of the building, it is most effective. However, in that case, the possibility that the structure is unstable increases. Therefore, an engineer should consider both structural efficiency and safety when a mid-story isolation system for a high-rise building is designed.

• 한국농공학회지
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• 제43권5호
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• pp.116-123
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• 2001

This paper represents results of an effort to seismically rehabilitate a 12-story nonductile reinforced concrete frame building. The frame located in the most severe seismic area, zone 4, is assumed to be designed and detailed for gravity load requirements only. Both pushover and nonlinear time-history analyses are carried out to determine strength, deformation capacity and the vulnerability of the building. The analysis indicates a drift concentration at the $1^{st}$ floor level due to inadequate strength and ductility capacity of the ground floor columns. The capacity curve of the structure, when superimposed on the average demand response spectrum for the ensemble of scaled earthquakes indicates that the structure is extremely weak and requires a major retrofit. The retrofit of the building is attempted using viscoelastic (VE) dampers. The dampers at each floor level are sized in order to reduce the elastic story drift ratios to within 1%. It is found that this requires substantially large dampers that are not practically feasible. With practical size dampers, the analyses of the viscoelastically damped building indicates that the damper sizes provided are not sufficient enough to remove the biased response and drift concentration of the building. The results indicate that VE-dampers alone are not sufficient to rehabilitate such a concrete frame. Concrete buildings, in general, being stiffer require larger dampers. The second rehabilitation strategy uses concrete shearwalls. Shearwalls increased stiffness and strength of the building, which resulted in reducing the drift significantly. The effectiveness of VE-dampers in conjunction with stiff shearwalls was also studied. Considering the economy and effectiveness, it is concluded that shearwalls were the most feasible solution for seismic rehabilitation of such buildings.

• 천문학논총
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• 제31권3호
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• pp.77-85
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• 2016

We study the manufacturers of the astronomical instruments invented as part of the so-called Ganui-Dae (astronomical platform) project in the reign of King Sejong (1418-1450) of the Joseon dynasty. The main purpose of this project was to compile the Chiljeongsan-Naepyeon, a Korean calendar, that lasted for 5.5 years from 1432 to 1438. Through this project, a total of 17 astronomical instruments such as the armillary sphere, celestial globe, and auto-striking clepsydra were developed. It is generally known that most of them were manufactured by Lee Cheon (李蕆, 1376-1451) and Jang Yeong-Sil (蔣英實, fl. 1423-1442). In this study, we investigate the accounts of the Veritable Records of King Sejong, Munjong, and Sejo, focusing on the inscription written out to memorize the completion of the Ganui-Dae project. We found that at least 12 persons took part in manufacturing the astronomical instruments of the Ganui-Dae project. Lee Cheon was involved in the production of four instruments, while Jang Yeong-Sil was involved in two; therefore, it seems that the achievement of Jang Yeong-Sil was overestimated. We also found that Jeong Cho (鄭招, ?-1434) was a scientist and Lee Cheon was an engineer in the early phase of the Ganui-Dae project, while King Sejong and Yi Sun-Ji (李純之, 1406-1465) played major role in the late phase. According to our study, King Sejong and Yi Sun-Ji were involved in the production of at least seven and five instruments, respectively. In conclusion, we believe that this study will be helpful to understand the practical manufacturers of the astronomical instruments invented during the Ganui-Dae project in the Joseon dynasty.