• 제목/요약/키워드: Maximum norm

검색결과 74건 처리시간 0.021초

린 프로세스 기반 아웃리거 시스템의 Set-based Design 적용 방안에 관한 연구 (A Study on the Application Methodology of Set-based Design Approach of Outrigger System based on Lean Process)

  • 이승일;조영상
    • 한국건설관리학회논문집
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    • 제12권4호
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    • pp.50-58
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    • 2011
  • 린은 고객이 정하는 가치를 정의하고 가치의 흐름에 방해되는 불필요하고 낭비되는 요소를 없애는 과정을 기본으로 하는 경영철학이다. 생산관리에서 출발한 린이라는 경영철학은 건설 산업에서“린 건설”이라는 이름으로 건설단계에서 시작되었으며 이제는 생산성 향상을 효과적으로 이룰 수 있는 설계단계로의 확장이 필요한 시점이다. 현재 국내의 구조설계업무방식은 순차적 공학 개념의 Point-based Design 방식으로 설계자의 경험과 판단에 의존하여 초기 설계안을 결정하고 이후 상세설계를 진행하는 과정으로 설계업무가 진행되었다. 이에 반해 동시공학 개념의 Set-based Design 방식은 전체 프로젝트 관점에서 낭비요소를 없애고 프로젝트 생산성 향상을 위해 다양한 설계안을 제한된 범위 내에서 바로 선택하지 않고 더 확실한 정보가 나올 때까지 설계안의 선택을 유보하여 합리적이고 경제적인 설계안을 결정하는 린 기반의 설계 프로세스이다. 본 연구에서는 전통적인 구조설계방식에 대해 SBD방식을 도입하고, SBD프로세스의 의사결정기법으로 계층화분석법(AHP)을 적용하여, 후행업무단계들에 대한 사전 고려로 프로젝트 전체 관점에서의 낭비를 최소화하고 생산성을 향상할 수 있는 설계 방법론을 제안하고 하고자 한다. 이를 위해 PBD와 SBD방식에 대한 분석 및 의사결정방안을 모색하였고, 제안된 SBD프로세스의 사례연구를 통해 실무에서의 활용방안을 제시하였다.

영남육괴내 육십령 복운모화강암에 대한 지화학적 연구 (The Geochemistry of Yuksipryeong Two-Mica Leucogranite, Yeongnam Massif, Korea)

  • Koh, Jeong-Seon;Yun, Sung-Hyo
    • 암석학회지
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    • 제12권3호
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    • pp.119-134
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    • 2003
  • 육십령 복운모화강암은 광물학$.$지화학적으로 과알루미나 성질을 특징적으로 나타낸다. 육십령 화강암체는 1.15∼l.20 범위의 높은 알루미나 포화 지수와 2.20∼2.98wt% 범위의 높은 CIPW norm 강옥 함량을 나타낸다. 색지수는 <16%이고, FeO$^{T}$ +MgO+TiO$_2$,는 평균 1.9 wt%로서 우백질화강암에 해당한다. 육십령 복운모 우백질화강암은 SiO$_2$성분이 증가함에 따라, TiO$_2$, $Al_2$O$_3$, FeO, Fe$_2$O$_3$, MgO, CaO, $K_2$O, P$_2$O$_{5}$ , Rb, Ba, Sr 은 감소하는 경향을 나타내는 반면, Zr과 Th는 증가하는 경향을 나타내는데, 이는 장석, 흑운모, 인회석 저어콘의 분별경정작용에 기인한 것으로 해석된다. 거정질 암맥에는 SiO$_2$and P$_2$O$_{5}$ 는 높게, 그 외의 주원소는 결핍되어 나타난다. Manaslu, Hercynian 복운모 우백질화강암, Lachlan습곡대의 S-형 화강암과 비교해 보면, 육십령 복운모 우백질화강암은 낮은 Rb, 높은 Ba, Sr을 나타낸다. 거정질 암맥의 지화학적 특징은 육십령 복운모화강암을 형성했던 멜트로부터 일부 원소들의 제거 혹은 유동성에 의해 높은 Rb, Nb와, 낮은 Ba, Sr, Zr, Th, Pb 함유를 나타낸다. 육십령 복운모 우백질화강암은 총 휘토류 함량이 95.7∼123.3ppm 범위를 나타내며, 운석에 대해 표준해보면, 저 내지 중정도의 Eu 이상(Eu/Eu*= 0.7∼0.9)을 가지면서 경희토류원소가 풍부하고 중희토류원소가 결핍된 매우 경사가 져 있는((La/Yb)$_{N}$ = 6.9∼24.8) 변화를 보여준다. 반면에 페그마틱 암맥은 총 휘토류원소의 함량이 7.0ppm으로 운석에 대해 표준화하면, 강한 부의 Eu 이상(Eu/Eu*= 0.2)을 가진 편평한 양상을 나타낸다. 복운모 우백질화강암을 형성했던 멜트의 성분은 기원암 뿐만 아니라 기원암이 녹은 후의 잔류물질의 양에도 의존한다. 특히 CaO/$Na_2$O의 비와 Rb/Sr-Rb/Ba의 비들은 강한 과알루미나질 화강암에서는 기원암의 성분에, 즉, 기원암의 사장석과 점토 함량 비에 주로 의존한다. 육십령 복운모 우백질화강암은 사장석 성분보다 점토 성분이 풍부한 암석에서 기원한 Manaslu와 Hercynian 복운모 우백질화강암들(예를 들면 Millevaches와 Gueret)보다는 더 높은 CaO/$Na_2$O의 비와 더 낮은 Rb/Sr-Rb/Ba 비를 나타내고 있는데, 이러한 지화학적 특징은 점토 성분보다는 사장석이 풍부한 석영장석질 암석으로부터 기원했던 것으로 사료된다.

기후 변화에 따른 영남지역의 벼 출수적기 평가 (Evaluation of Optimum Rice Heading Period under Recent Climatic Change in Yeongnam Area)

  • 김춘송;이재생;고지연;윤을수;여운상;이종희;곽도연;신문식;오병근
    • 한국농림기상학회지
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    • 제9권1호
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    • pp.17-28
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    • 2007
  • 영남지역의 농업기후변화 양상을 살펴보고 기후변화에 대응하여 벼 재배의 안전성과 품질향상을 위한 기초 자료를 얻고자 영남지역 22개 기상대 및 기상관측소의 최근 10년($1996{\sim}2005$년) 기후값을 평년($1971{\sim}2000$년)과 비교하고 지역별 벼 생육 가능기간과 최적 출수기를 산정하였다. 영남지역의 최근 기후는 평년에 비하여 평균기온과 강수량은 상승하였으나 기온일교차와 일조시간은 감소하는 특징을 보였는데, 특히 $7{\sim}8$월의 기온은 오히려 낮아졌고, $8{\sim}9$월의 강수량이 현저히 증가하였으며, 기온 일교차와 일조시간은 $8{\sim}10$월에 걸쳐 크게 감소하는 경향이었다. 최근 10년의 벼 생육가능기간은 봉화의 171일부터 부산의 228일까지 매우 넓고 다양하였으며, 평년에 비하여 $1{\sim}13$일 정도 늘어났다. 고품질 쌀 생산을 위한 적정 출수기간은 평년과 비교하여 최근에 $1{\sim}3$일 정도 늘어났으며, 최대 기후등 숙량을 기준으로 추정한 최근 10년의 최적 출수기는 봉화의 7월 31일에서 부산, 마산, 통영의 9월 7일로 지역에 따라 차이가 심하였다. 봉화와 문경, 영덕을 제외한 최근 10년의 지역별 출수 최적일은 평년과 비교하여 거제와 마산, 안동, 의성에서는 변화가 없었고, 대부분의 지역에서 $1{\sim}8$일 정도 늦어진 것으로 분석되었다. 이러한 결과는 기후변화로 인하여 영남지역에서도 고품질 쌀 생산을 위한 지역별 벼 재배적기와 적정 출수기의 재설정이 필요하며, 특히 중만생종 벼 품종 육성 시 기후변화를 감안하여 출수기를 현재보다 늦출 필요가 있을 것으로 생각된다.

가정학교육 영역에서의 인구교육문제에 관한 조사연구 -선임가정학자들을 대상으로- (A Study of the Attitude of/and Problems Encountered by Senjor Home Economist Toward the Integration of Family Planning Education in the Korean Formal School System)

  • 김지화
    • 대한가정학회지
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    • 제19권3호
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    • pp.83-101
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    • 1981
  • Under the full consideration of the growing need and importance of population education in the field of home economics in Korea, the study was carried out to verify and assess the following facts on the current issues of population education of home economists who are presently engaging in teaching professions as the teachers of middle and high school and professors of college and universities by setting its primary objectives of the study as followings; 1) to assess the degree of general knowledge and attitudes of home economists toward population education in the field of home economics, 2) to verify the problems encountered in implementing population education by home economists in its field, 3) to find an existing status of previous trainings received and other activities of population education of home economists aimed at utilizing these findings as a part of reference materials when the population education is conducted in the field of home economics. In order to attain these objectives described above, the questionnaire was carefully designed to house a total of 40 questions with good combination of multiple-choice and the simple answer questions. The mail questionnaire survey was conducted by establishing teachers of home economics at middle/high schools and college/universities as Senior Home Economists(SHE) who are from public, private liberal arts and vocational schools. The rate of response observed during the survey was 45.6 percent and the findings of the survey research are as follows: 1) Examining the status of the respondents by residence and religion, it was found that 45 percent of middle & high school teachers ar.d 59. 1 percent of college professors are residing in Seoul city area and that the largest percent of them are christian in their religion. Analyzing respondents by their ages, 56 percent of middle/high school teachers are in their 30s, 45 percent of college professors are in their 40s, and 37 percent of college teachers are in their 30s. In addition, 13 percent of the total respondents are found to be unmarried. The study also revealed that 71 percent of the college professors finished Master Degree course and 82 percent of middle/high school teachers are graduated from college level lasting 4 years. Looking over the status cf major fields of respondents, 68.4 percent of middle/high school teachers are specialized in home economic education and the college professors, on the other hand, show relatively even prortion by specializing in the order of food & nutrition science, clothes & textile science and home managerial science. As far as the length of teaching experience is concerned, a relatively longer period of teaching experience is observed in the college professors in comparison with that of middle/high school teachers. In other words, 33.3 percent of middle/high school teachers are experienced in teaching from 6 to 10 years on average while 43.9 percent of college professors show more than 16 years of experience. 2) Examining the status of existing number of children cf the respondents, one boy and one daughter pattern is predominant, showing 28.5 percent in middle/high school teachers and 21.1 percent in college professors. As for the desired number of children of unmarried respondents, it is observed that 43.8 percent of middle/high school teachers desire to have one boy and one girl, and 31.3 percent of college professors want to have one child regardless of the sex. By assessing the degree of awareness of the population education through their students, it is observed that 53 percent of middle/high school teachers and 50 percent of college professors are aware of population education in some extent and that a majority of respondents took the positive attitudes toward an inclusion of family planning components into the formal school education. Another noteworthy to observe is that a total of 84.8 percent out of middle/high school teachers pointed that the population education currently conducted at schools as a part of home economics are less sufficient than it should be. 3) Analyzing the tendency as to whether the respondents were experienced in receiving population education during the time when they were students, 75 percent of college professors and 59 percent of middle/high school teachers responded negative answers in the survey. In the mean time, a total of 50 percent of the respondents replied that they began to acknowledge the importance of population education mainly through the participation of some sort of population-education orientend seminars, experienced by 40 percent of college professors and 80 percent of middle/high school teachers. 4) What it calls attention in this study was to find that 96.5 percent of middle/high school teachers and 72 percent of college professors conduct population education to some extent during their lecture hours and that more than 80 percent of them are never experienced in teaching population and family planning contents in their regular classes. It is, on the other hand, found that no more than once was the response of those who believe themselves that they are experienced in teaching these relevant components to their students. Analyzing the contents of the subjects being taught in the class, a large percent of them are found to be consisted of population and family planning contents. According to this study, the current population education through the formal school is quite inactive. Analyzing the facts, 44.9 percent of the college professors responded that the population and family planning components are quite apart from their specialization which eventually generates lack of interest in the field. 5) It is also noticed through the study that the degree of frequency of commenting on population and family planning contents during the classes was depending significantly on their specializations which means that the degree of frequency varies from a major to another. Those who majored in home managerial science was the first one, as compared to others who majored in different specializations. Glancing over the status of correlations between ages of the respondents and numbers of seminar paticipation, it is quite clear that the aged group participated more than the younger group did, and that the most highest number of participations made by college professors were those who are in 50s. In addition, it is also found that those who are aged 20s and 60s of the respondents were the group who comments least on the contents of population and family planning at their classes. The suggestions and recommendation made through this survey research are as follows. 1) No one denies that the rapid increase of population, as compared to the limited size of land and resources, will certainly affect adversly to an enhancement of individual life quality which will, eventually, bring forth the poverty of the nation. This is the reasson why we are insisting that the world population be controlled up to an optimum level with a matter of global concerns. It is our understading that the primary aim for reducing number of population is believed to be attained only by conducting the systematic and comprehensive population education through the formal schools. Therefore, the role of home economists in the field of population/family planning education is considered very importment due to the fact that an ultimate goal of population education is placed in elevating the quality of family life by having optimum number of children through family planning program. 2) It is quite clear that home economists as teachers of formal school in all level are invited to pay their attention on redefining the ultimate goal of education and that of population education. We also understant that the primary objective of population education is to change the norm and value of the clients by replenishing the students with pertinent knowledge and attitudes on population and its related problems through a sort of education in order to attain the ultimate goal for enhancing the quality of life. There is no exception in the theory of home economics. An altimate goal of home economics is to elevate the general quality of life through an establishment of value existed in daily life. Considering the relations between population education and home economics, it is quite indespensable to bandle population components as an integral part in the field of home economics. We believe, therefore, that the senior home economists positive participation in the effort population control is more needed than it has been. 3) It is also strongly urged that population education should be a part of instructor training course for home economics. In other words, the teacher of home economics should be well aware of population and its problems by teaching interrelationship between population education and home economics, needs, contents and methods of population education during the instructor training courese for home economics. In addition, the senior home economists should be encouraged through positive participation on the short term training by types of domestic and international seminar, workshop, etc. 4) We certainly believe that the population education can not sustain itself without any backing-up of information and findings' of various and comprehensive researches of natural and social sciences. Accordingly, every senior home economist is invited to exert their maximum effort to conduct systematic study with an aim to utilize these findings and information at best in population education in the field of home economics. Therefore, we consider that the development of training material is imminent in order to provide effective and efficient population education through the for training of home economies. It should be noted that these training materials must be carefully designed, tailored and developed to meet the different classes of trainees under the considerations as to whether it is easily adaptable and infusable into the curricula of every field of home economics, and it is acceptable in the degree of difficulty and quality in its contents. 5) It is true that there are many domestic and international research rapers, reports and findings in the field of population education and family planning. However, there is a tendency that the most of research papers are heavily relying on the authors intension and preferences in its expression and publication. Under these circumstances, it is urged that the home economists should aware of the growing need of the technical training in order to keep these available information and research findings reprocessed and redesigned to insure the practical application into the population education in the field of home economics in Korea.

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