• 한국건설관리학회논문집
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• 제12권4호
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• pp.117-129
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• 2011

건설프로젝트의 대형화, 복잡화, 다양화로 인해 전략적 대응방안 중 하나로 BIM(Building Information Modeling)이 등장하였다. 최근 조달청에서는 2012년부터 500억 이상의 건설 프로젝트에 BIM적용을 의무화하는 BIM 활성화 계획을 발표하여 국내 건설 산업 전반으로 BIM도입이 확산되고 있다. 이에 BIM기반 프로젝트 사례를 바탕으로 각종 BIM연구가 진행되고 있다. 그러나 현재 BIM관련 연구는 BIM도입에 대한 단편적인 문제점 도출 및 BIM에 대한 기술력과 체제 구축 등의 문제점을 중점으로 활발히 진행되고 있으나, 본질적인 BIM기반 프로젝트 전반에 대한 만족도에 관한 연구는 전무하다. 따라서 본 연구는 국내 BIM기반 프로젝트에 대한 실태 파악 및 만족도를 조사하여 이를 종합적으로 분석하고 현재 실무자들의 시각에서의 프로젝트 내 BIM적용에 대한 중요 부문 및 취약 부문을 파악한 뒤 중점 개선하는 방향을 제시하는 등 효율성 면에서의 BIM기반 프로젝트에 대한 만족도 연구를 하였다.

• 한국건설관리학회논문집
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• 제9권3호
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• pp.194-205
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• 2008

건설업은 일반 제조업의 생산과정과는 달리 다양한 참여주체들이 모여 프로젝트 성공이란 하나의 목표아래 정보를 공유하며 업무를 진행하므로 한 프로젝트마다 일시적인 팀워크가 형성된다. 다양한 참여주체들은 건설공사의 단계별 역할이 다르며, 업무 및 이에 따른 이해관계 역시 복잡하게 얽혀있다. 건설프로젝트의 효율적인 관리와 경영의 최적화를 위하여 CM제도가 도입이 되었다. 따라서 CM제도의 성공을 위해서는 주요 참여주체(발주자, CMr, 설계자, 시공자)의 협력관계가 요구된다. CM제도가 도입된 이래 성공적으로 사업을 수행하기 위한 일환으로 CM성과측정에 대한 많은 노력이 있었으나, 발주자의 입장에서만 바라본 항목으로 측정되고 있다. 이에 본 연구에서는 CM성과를 객관적으로 측정하기 위해서 건설프로젝트의 주요 참여주체인 발주자, CMr, 설계자, 시공자의 균형적인 시각을 바탕으로 한 성과측정 항목의 필요성을 제기 하고자 한다. 건설프로젝트의 주요 참여주체인 4자(발주자, CMr, 설계자, 시공자)의 협력관계를 살펴본 뒤 각 주체에 따라 성과항목에 대한 인식차이가 있다는 것을 검증하였다.

• 한국환경교육학회지:환경교육
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• 제13권1호
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• pp.96-110
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• 2000

There are some considerations that must take into account in environmental education in the aspect of the difference of value clarification between ecological and economic viewpoint on environment. Although we have a tendency to think that the differences are unavoidable because we are on the economy-oriented life, we should realize that such emphasis to economics comes from the differences between ecological and economic view point on environment. We have lived and thought on the basis of Economic view point, especially, environmental policies are established on the basis of economic efficiency. But this tendency has become great obstacles to environmental ethics education because it dilutes the reason of natural preservation and removes the fundamental reasons why the nature should be preserved. Therefore it is very difficult to balance the value clarification between economic and ecological viewpoint in actual life. Furthermore, environmental problems can not be solved only through economic approach, because of their limits to belief solving from providing incentives. It is very important to make people have a way of thinking which economic activities and debates can be made on the ecological resources. Therefore we can compare this relation to CHAE-YONG founded on Buddism and Chinese philosophy. CHAE means essence of every reaction in the cosmos, and YONG means the reaction itself. CHAE is regarded to ecological resources, and YONG is thought to every-day economic activities. YONG is not able to existwithout CHAE. If economic activities can be done on the basic limit of ecological resources, we can build suitable environment to living condition. We call this appropriate environment as SANG. In other words, the connection of CHAE-YONG-SANG means ecological resources - economic activities - sustainable environment. It is realized that the relations between economics and ecology should be equalized for the balanced environmental ethics education. This study tries to get out of unbalanced relations between economics and ecology from the persepectives of CHAE-YONG-SANG and it was done to suggest an alternative environmental ethics education program

• 한국컴퓨터정보학회논문지
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• 제27권9호
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• pp.91-100
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• 2022

본 연구의 목적은 1990년대 중반 이후 본격화된 글로벌 지식재산권 체제를 포스트식민주의의 시각에서 비판적으로 검토하는 데 있다. 보다 구체적으로는 미디어 콘텐츠를 '복제하는' 미디어적 실천인 '미디어 해적 행위'를 새롭게 바라보고자 했던 '포스트식민주의적 해적연구'가 글로벌 IP체제에 대해 어떠한 논점의 문제제기를 하였는지를 살펴봄으로써, 21세기 전 지구적 자본주의 시스템의 '표준'으로 자리 매김한 글로벌 IP체제를 '상대화'시키고자 했다. 로렌스 량(Lawrence Liang)이 제기한 바 있는 '다공적 합법성'(Porous Legalities) 개념을 통해 미디어 해적 행위를 글로벌 네트워크에 참여하는 통로로 재사유하고자 했던 '포스트식민주의적 해적연구'의 관점이 글로벌 IP체제를 인권과 같은 비국가적 합법성의 견지에서 파악하고자 한 이론적 시도의 결과라는 점을 확인하였다. 이를 통해, 이 연구는 미디어 해적 행위를 비공식적 미디어경제의 한 축으로 이해하면서 동시에 이를 공식적 미디어경제와의 연관관계 속에서 균형 있게 파악할 필요성이 있음을 제기했다.

• 동아시아식생활학회지
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• 제13권6호
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• pp.552-560
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• 2003

In this study, Artemisia capillaris, which has been used in oriental medicine and folks remedy, was investigated to characterize the nutritional composition (protein, lipid, ash, fiber, amino acids, fatty acids, Na, K, P, Mg, Ca and Fe) and effective substance (scopoletin). Artemisia capillaris has often been cited in medical literature for its medicinal effects. The Korean Food and Drug Administration allowed Artemisia capillaris as a food stuff and indicated as In-Jin-Sook. From the view point of the subjects who eat In-Jin-Sook products, most of them ingested it for a certain pharmacological efficacy rather than as a beverage or a food. Therefore, we need to develop functional foods using In-Jin-Sook. Artemisia capillaris was superior in protein, crude fiber, amino acid and fatty acid compositions to wild greens according to Korean Nutritional Composition Table. Also scopoletin, blown for blood vessel relaxation and hypotensive effect, was detected at the level of 326.13 $\mu\textrm{g}$/g. These results demonstrated that Artemisia capillaris has both pharmaceutical effects and balanced nutritional contents. Artemisia capillaris has sufficient values to use as a food stuff for functional foods.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2002년도 춘계 학술발표회 논문집
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• pp.306-316
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• 2002

This paper summarizes the results of full-scale cyclic seismic testing on four RBS (reduced beam section) steel moment connections. Key test variables were web bolting vs. welding and strong vs. medium PZ (panel zone) strength. The specimen with medium PZ strength was specially designed to mobilize energy dissipation from both the PZ and RBS region in a balanced way; the aim was to reduce the requirement of expensive doubler plates. Both strong and medium PZ specimens with web-welding were able to provide sufficient connection rotation capacity required of special moment frames, whereas specimens with web-bolting showed inferior performance due to the premature brittle fracture of the beam flange across the weld access hole. In contrast to the case of web-welded specimens, the web-bolted specimens could not transfer the actual plastic moment of the original (or unreduced) beam section to the column. If a quality welding for the beam-to-column joint is made as in this study, the fracture-prone area tends to move into the beam flange base metal within the weld access hole. Analytical study was also conducted to understand the observed base metal fracture from the engineering mechanics point of view.

• 대한가정학회지
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• 제44권3호
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• pp.61-68
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• 2006

The purpose of this study was to explore the perceptions of preservice teachers toward children from single parent families. 218 preservice teachers (209 female and 9 male) who were enrolled in the department of early childhood education and child care & education were participated in this study. A questionnaire was developed based on the questionnaire developed by Song, Sung, & Han (2003). Data were analyzed by using SPSS 11.5. The results were followed. First, preservice teachers' personal experiences of single parent families did not influence their perception of children from single-parent family. Second, preservice teachers who strongly held the view of keeping traditional family structure showed negative expectations of children's school adjustment. Third, preservice teachers reported the importance to help the children adjustment at school as well as to deal with their personal and family problem. The results presented that there was an increasing need in teacher education, to develop curriculum for preservice teachers to have balanced views or reduce their biased perception against diverse family structure and children from single parent families.

• 한국실내디자인학회논문집
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• 제16권2호
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• pp.40-50
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• 2007

This study started from my concern over maintenance and renewal of existing buildings and other seriously damaged Modern Architecture under the urban development. Above all, we must face up to reality of an increasing need of renovation of old buildings that are in its physical, social, and economical decrepitude. Currently, 25% of total buildings come under renovation period within 20 years, which means that we do not have enough time to decide the destiny of old buildings. In the city, there has been endless controversy over conversation and development. Recently the Cultural property Registration System made it possible a positive usage of non-designated cultural property with historical value. This very useful system renewed our perception on Modern Architecture as cultural property and also triggered peoples' interest in recreating new value beyond economical one. So we really need a balanced view that can bring into both growth of contemporary city and renewal use of Modern Architecture. Here, in this study I tried to solve that problem with Conversion Design and define what a realistic design way for them is. To get more reasonable result, I chose a factor analysis for 20 conversion projects in Japanese Modern Architecture. Conversion Design is a proper way to restore the identity of old buildings and the most effective way to sustainable use of Modern Architecture.

• Journal of Power Electronics
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• 제16권4호
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• pp.1306-1315
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• 2016

Modern power systems driven by high-power converters have become inevitable in view of the ever increasing demand for electric power. The total power loss can be reduced by limiting the switching losses in such power converters; increased power efficiency can thus be achieved. A reduced switching frequency that is less than a few hundreds of hertz is applied to power converters that produce output waveforms with high distortion. Selective harmonic elimination pulse width modulation (SHEPWM) is an optimized low switching frequency pulse width modulation method that is based on offline estimation. This method can pre-program the harmonic profile of the output waveform over a range of modulation indices to eliminate low-order harmonics. In this paper, a SHEPWM scheme for three-phase three-leg neutral point clamped inverter is proposed. Aside from eliminating the selected harmonics, the DC capacitor voltages at the DC bus are also balanced because of the symmetrical pulse pattern over a quarter cycle of the period. The technique utilized in the estimation of switching angles involves the firefly algorithm (FA). Compared with other techniques, FA is more robust and entails less computation time. Simulation in the MATLAB/SIMULINK environment and experimental verification in the very large scale integration platform with Spartan 6A DSP are performed to prove the validity of the proposed technique.

• Computers and Concrete
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• 제12권6호
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• pp.755-774
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• 2013

Considering the well known environmental issues of cement manufacturing (direct and indirect levels of $CO_2$ emissions), clinker replacement by supplementary cementing materials (SCM) can be a very promising first step in reducing considerably the associated emissions. However, such a reduction is possible up to a particular level of SCM utilization, influenced by the rate of its pozzolanic reaction. In this study a (4-step) structured methodology is proposed in order to be able to further adjust the concrete mix design of a particular SCM, in achieving additional reduction of the associated levels of $CO_2$ emissions and being at the same time accepted from a derived concrete strength and service life point of view. On this note, the aim of this study is twofold. To evaluate the environmental contribution of each concrete component and to provide the best possible mix design configuration, balanced between the principles of sustainability (low environmental cost) and durability (accepted concrete strength and service life ). It is shown that such a balance can be achieved, by utilising SCM by-products in the concrete mix, reducing in this way the fixed environmental emissions without compromising the long-term safety and durability of the structure.