• 한국항해항만학회지
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• 제47권2호
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• pp.49-56
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• 2023

As interest in autonomous ships continues to grow, researchers around the world are dedicating themselves to the development of relevant technologies. However, these technologies are not yet perfect. Several technical problems remain unresolved. To address these problems, this study presents the implementation of a ship trajectory algorithm for group navigation, where followers can navigate by following the trajectory of a leader. The algorithm works by storing the leader's trajectory as a follow-point and by calculating the azimuth using the line-of-sight guidance law to reach it. A course-keeping controller based on PD control is implemented to follow the target course and a speed control algorithm is designed to prevent collisions. Sea experiments were conducted using 1 m class small RC model boats to verify the proposed algorithm. The follower successfully navigated by following the leader's trajectory and maintained the designated distance to the forward boat. This study is significant in that it implements an algorithm for the follower to follow the trajectory of the leader rather than directly following it as in conventional methods, and verifies it through sea experiments.

• 한국도서관정보학회지
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• 제4권
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• pp.91-111
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• 1977

The view point of the library is treated as a first subject. This study is scheduled to construct, as a experimental study, the system of the Library Science. The study of this fields is called upon greatly because the trial to understand library as a socio-cultural phenomenon did not study as many times. As a result of the study, library is defined as ${\ulcorner}Structural Formation of Inquirying Behavior{\lrcorner}$. Not only technique and actual proof are possible in this study but also this definition is technical definition to indicate the main phenomenon of Librarial Behavior. This schedule represent the trial to define Library Behavior which could anticipate and fabricate when we analyze this definition First, we can find out, first of all, the researching behavior among the human behaviors and then human behavior has the condition of practice. At last, researching behavior can not have any result when it is a natural situation, it has only the meaning when it is guided by an obvious intention. The object of the library is just this human behavior. Second, Formation permits the guidance and self-control at the same-times. The answer about what we find out and practice make it possible the act of guidance. This guidance can't burden any subject but permit the people to result his own researching behaviors. He can save his activities, his own researching behaviors by the result of it. Third, The statematical means efficient performances, and them efficient performances is impossible, here is 'discoveries' of behavior itself. The system of the library is the formation of the relation between the accumulated civilizations and accumulated civilizations. As the definitions of the above mentions, library has the big abilities to the creation and succession of the civilization. As the contemporary view-points, there are some questions about the above described definition can meet it of the library. When we frame the science of library as the learning systems, we can't but the library as this definitions.

• 디지털융복합연구
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• 제11권10호
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• pp.387-394
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• 2013

데이터 마이닝은 예측이나 분석을 위해서 많은 양의 데이터에 존재하는 여러 가지의 관계를 추출하는 과정이라고 할 수 있다. 그러한 데이터에는 매우 많은 변수로 인한 차원의 증가로 인하여 계산상의 어려움이 수반되어지고 변수의 중복성과 중요도에 있어서 다양한 통계적 관계가 존재한다. 따라서 동일하거나 유사한 데이터를 같은 그룹으로 형성하는 클러스터 해석은 데이터 마이닝에서 필수적인 요소이다. 본 연구는 범주형 데이터의 분류에서 발생하는 불확실성의 처리를 위해 러프집합을 이용하여 정보 엔트로피를 이용한 새로운 척도를 정의하고 연구 대상에 대한 유사행동을 분석하는 시스템 구현에 그 의의가 있다. 데이터는 평택공업고등학교에서 채집되었고 이를 토대로 제안된 방법이 학생들의 유사행동에 대한 보다 정확한 결과를 보임을 알 수 있었다. 또한 속성의 개수가 10개 이상인 경우에 기본 방법과의 차이를 보이며 취업의사결정에서 학생들의 의식을 기존 방법보다 효과적으로 반영하였다.

• 대한공업교육학회지
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• 제42권2호
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• pp.1-19
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• 2017

이 연구의 목적은 중등단계 공업계열 직업계고 교사의 직무 수행 시간 현황과 적정 직무 수행 시간을 분석하는 것이다. 아울러 중등단계 공업계열 직업계고 전문교과 교사와 보통교과 교사의 직무 수행 시간 현황 및 적정 직무 수행 시간을 함께 분석하고자 한다. 중등단계 공업계열 직업계고 교사의 직무 수행 시간을 분석하기 위하여, 중등단계 직업계고 교사 대상으로 구명된 직무를 바탕으로 조사 도구를 개발하였으며, 조사 도구는 설문지를 사용하였다. 본 연구의 결과는 다음과 같다. 첫째, 중등단계 공업계열 직업계고 교사가 인식하는 직무 수행 전체 시간은 2,787.8분이고, 적정 직무 수행 전체 시간은 2,934.7분이며, 직무 수행 시간과 적정 직무 수행 시간 간의 차이는 146.9분으로 나타났다. 직무 영역별 직무 수행 시간은 수업 운영, 교과외 학생지도, 교무 행정 업무, 수업 준비 및 계획 영역 등의 순으로 많게 나타났고, 적정 직무 수행 시간은 수업 운영, 수업 준비 및 계획, 교과외 학생지도, 교무 행정 업무 영역 등의 순으로 많게 나타났다. 직무 수행 시간에 비해서 적정 직무 수행 시간이 적은 직무 영역은 수업 운영, 교과외 학생지도, 교무 행정 업무영역이고, 이외 직무 영역에서는 직무 수행 시간이 더 필요한 것으로 나타났다. 둘째, 중등단계 공업계열 직업계고 교사의 교과(전문교과/보통교과)별 직무 수행시간은 전문교과 교사 2,888.3분, 보통교과 교사 2,536.1분으로 나타났고, 적정 직무수행 시간은 전문교과 교사 3,021.8분, 보통교과 교사 2,716.8분으로 나타났다. 중등단계 직업계고 교사가 인식하는 직무 수행 시간과 적정 직무 수행 시간 간의 차이는 전문교과 교사 133.5분, 보통교과 교사 180.7분으로 나타났다.

• 농촌지도와개발
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• 제25권1호
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• pp.31-44
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• 2018

This is a case study on "the Project for Production Facility and Technical Support of Processed Seed-Potato (2008-2010)" based on the Value Chain Analysis (VCA) used to create and plan International development cooperation projects. The project is the earliest model of Creating Shared Value (CSV) in the agricultural sector. For the case analysis, a framework was established to assess the effectiveness and impact of the CSV project based on the main factors of the VCA. As a result of the assessment, project participation by OSI was able to increase the overall utility by developing the Vietnamese potato processing industry and meeting consumer demand. Furthermore, it formed a business model to promote win-win cooperation and upgraded the value chain of the potato industry. In addition, it contributed to the improvement of incomes and the quality of life of farmers and communities by providing technical guidance and purchase of contracts, as well as labor division and cooperation with other activity supporters.

• 항공우주산업기술동향
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• 제7권1호
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• pp.128-140
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• 2009

본 논문에서는 FAR Part 23에 따른 복합재 소형항공기 구조 인증시 복합재료의 인증활동에서 발생할 수 있는 기술적 문제점 또는 고려사항을 검토하고, 이에 대한 인증 신청자가 수행해야 할 것으로 예상되는 사항을 검토하였다. 본 논문은 복합재 인증시 발생하는 기술적 문제에 초점을 맞추어 규정과의 관계 및 인증 경험에 관련한 기술 적 문제를 설명하였다. 복합재 인증활동에 대한 개괄적 내용과 복합재 항공기 구조물의 인증에 유용한 지침과 참고자료를 제시하고 있다. 본 논문에 소개된 일반적인 인증에 관련한 내용은 모든 복합재료 구조에 대해 적용되어지지 않을 수 있으며, 비행 안전에 치명적이지 않는 2차 구조에 대해서는 적용되어지지 않을 수 있다.

• 한국문헌정보학회지
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• 제12권
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• pp.225-267
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• 1985

This study is aimed to assure that the agricultural technical information which is the important factor to increase rural production should be widely used by rural communities, and for the wide circulation for the technical information, the appropriate information system is available for the farmers and extention workers who are responsible for the information transfer to farmers. The study is also aimed to find out an outline of a structure and characteristic of the appropriate information system for the rural communities in Korea. The method used to accomplish the purpose of the study, the modernization theory of agriculture of T. W. Schultz was examined and assertions of the information specialists regarding the issues of information transfer and agricultural information system :in developing countries were analyzed. Through the above literary research, the author tried to create the most suitable characteristic and structure of agricultural information system in rural communities in Korea. To justify the author's assertion, a survey through questionniares for a typical rural province was attempted. The assertion that the author tried to convey as the most suitable agricultural information system of this country is the establishment agricultural information analysis center mainly for the extention workers and designing information system which has affiliation between the rural guidance office which is already situated every unit of administractive districts all over the country and public library which is now not properly located and functioned.

• Nuclear Engineering and Technology
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• 제46권2호
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• pp.273-280
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• 2014

The spectrum weighted responses of various detectors were calculated to provide guidance on the proper selection and use of survey instruments on the basis of their energy response characteristics on the neutron fields. To yield the spectrum weighted response, the detector response functions of 17 neutron-measuring devices were numerically folded with each of the produced calibration neutron spectra through the in-house developed software 'K-SWR'. The detectors' response functions were taken from the IAEA Technical Reports Series No. 403 (TRS-403). The reference neutron fields of 21 kinds with 2 spectra groups with different proportions of thermal and fast neutrons have been produced using neutrons from the $^{241}Am$-Be sources held in a graphite pile, a bare $^{241}Am$-Be source, and a DT neutron generator. Fluence-average energy ($E_{ave}$) varied from 3.8 MeV to 16.9 MeV, and the ambient-dose-equivalent rate [$H^*(10)/h$] varied from 0.99 to 16.5 mSv/h.

• 실천공학교육논문지
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• 제9권2호
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• pp.119-124
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• 2017

사출성형 시 유압실린더의 힘으로 스크류가 앞으로 전진하는 동안, 금형의 러너시스템은 성형품 형상의 캐비티 내를 충진시키는 유로로 용융된 수지의 충진, 패킹과정에 관계되며, 이는 스프루(sprue), 러너(runner), 게이트(gate)에 의해서 성형품의 외관, 수지의 물성, 치수 정밀도 및 성형 사이클 등에 큰 영향을 준다. 러너, 게이트 설계가 잘못된 피드시스템은 다양한 성형불량을 일으키므로 이를 방지할 수 있는 최적의 러너밸런스를 유지하는 것이 중요하다. 사출금형을 제작하는 업체에서 응용할 수 있는 실무적인 금형기술 지식을 향상시키기 위해서 기술적인 애로분야에 대한 기술지도를 바탕으로 금형기술 과정의 훈련모델을 제시한다.

• 식품보건융합연구
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• 제7권3호
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• pp.41-50
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• 2021

The purpose of this study is to analyze the work value factors regarded as important by the culinary-related graduates in their 20s, and also to analyze the effects of work value factors on the life satisfaction. To achieve this purpose, this study analyzed the data of 155 graduates from departments including 'culinary arts', 'foodservice', and 'confectionery' among the college graduates in their 20s who participated in GOMS 2018. The results of analysis are as follows. First, the new generation majors in culinary arts showed the high importance of their aptitude and interest, employment stability, earned income. Second, in relation to the major field, the male graduates majored in culinary arts more highly perceived the importance than the female graduates majored in culinary arts. On the other hand, regarding the social reputation of job and work duty, the female graduates majored in culinary arts more highly perceived the importance than the male graduates majored in culinary arts. Third, the developmental value factor of work value had positive effects on the life satisfaction. Thus, the career-related staffs or professors of college should provide the career guidance by considering gender when the majors in culinary arts transit to the labor market after graduation.