• Applied Microscopy
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• 제42권3호
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• pp.124-128
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• 2012

Leaf surface structures were investigated in the Chinese juniper Juniperus chinensis by scanning electron microscopy. Adult scale leaves were collected from the tree, air-dried at room temperature, and sputter-coated with gold without further specimen preparation. Approximately fi ve stomata were locally distributed and arranged in clusters on the leaf surface. Stomata were ovoid and ca. 40 ${\mu}m$ long. The epicuticular wax structures of J. chinensis leaves were tubules and platelets. Numerous tubules were evident on the leaf regions where stomata were found. The tubules were cylindrical, straight, and ca. 1 ${\mu}m$ in length. They almost clothed the stomatal guard cells, and occluded the slit-shaped stomatal apertures. Moreover, the wax ridges were flat crystalloids that were connected to the surface by their narrow side. They did not have distinct edges, and their width/height ratio varied. In particular, the wax ridges could be discerned on the leaf regions where stomata were not present nearby. Since the wax ridges did not have distinct edges on their margin, they were identified as platelets. Instances were noted where platelets were oriented either parallel to each other or perpendicular to the cuticle surface. These results can be used in biomimetics to design the hierarchical structures for mimicking the plant innate properties such as hydrophobicity and self-cleaning effects of the leaf surface.

• 한국주거학회논문집
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• 제13권6호
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• pp.133-140
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• 2002

This study researches the dwelling satisfaction about apartment remodeling by inspecting ten apartments located in Gwang-Ju, Jun-Nam province. The method of study is to use the field study method, which is based on cultural anthropology, and the participant observation method at same time. According to the research, we find those things as they follow. First, the participation of residents and the mutual agreement are necessary in the process of the selecting a company. Furthermore it's hard to solve the problem about an uniform design and an inferior construction. These things are the most serious factor in dissatisfaction of resident environment. Second, the space of storage and veranda should be separated for the proper functions and the space for laundry is necessary. The rooms, except bedroom, and the bathroom in the main living room should be used for practical application because they are not used so often and if we make the veranda as a inner space, we've got to make a gardening plan, too. Through this research we find out that the participation of an expert company and residents for enough communication and mutual agreement and the space plan for the satisfaction of occupants are necessary for the proper apartment remodeling.

• 한국환경복원기술학회지
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• 제13권1호
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• pp.93-102
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• 2010

Greening sometimes fails because its method is not suitable for various site conditions, therefore the trend of selecting a revegetation method in Korea today is through test construction. However, due to enlargement, complication and diversification of domestic construction businesses, the importance of VE is gradually increasing as effective efforts over a whole life-cycle to obtain goals such as quality improvement and cost reduction, and not only quality and economic efficiency but also substantiality need to be considered in comparing revegetation methods. For this study, Sungnam~Janghowon (area1), where comparatively various slope revegetation methods are used, was selected the investigation site. The site was divided into three areas:blasting rock, ripping rock and earth sand. The revegetation methods used were six in the blasting rock area, five in the ripping rock area, and two in the earth sand region. 2007 monitoring data was analyzed, and Value (V) was calculated with LCC related ratio, and compared and contrasted with the evaluation of prior revegetation methods. Therefore it is believed that this analysis enables selection of the most appropriate method, unbiased towards one particular characteristic such as quality, vegetation growth and economy. When aiming for a durable effect, it shall be more efficient to select the most appropriate method focusing on LCC analysis, which deals with the economic aspect, as well as the design function aspect.

• 패션비즈니스
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• 제12권4호
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• pp.46-55
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• 2008

The purpose of this study is to provide the effective internet marketing communication strategy as marketing tools by analyzing the web sites of young casual fashion brands. We've selected 19 young casual fashion brands in 3 department stores and made the classification standard - advertising, promotion, public relation(PR), customer management - and analysed the young casual fashion brands according to 4 classification standard on the web sites. As a result of study, it is found that 19 young casual brands' web sites put an emphasis on activity of customer management and promotion in general. However, they did not conduct the PR and advertising actively compared with other parts. Especially, the promotion strategy occupies more parts than any other parts through the variety of membership card's services. Also they are sending e-mails or providing 1:1(FAQ/Q&A) board to the members as a customer management to be able to help to communicate with customer through the web site.

• 전력전자학회논문지
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• 제4권6호
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• pp.531-538
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• 1999

본 논문에서는 퍼지 논리에 기초를 둔 DC-DC converter를 위한 범용 FLC는 기존의 제어기와 비교할 때, 오버슈트 문제와 파라메터 변화에 대한 민감도 면에서 향상된 성능을 나타내었다. 이러한 성능 향상은 FLC 규칙들이 다양한 동작 영역에서 각각 적합하게 설정됨으로써 소신호 응답과 대산호 응답 모두 효과적으로 동작하도록 설계되었기 때문이다. 그 적용 예로 부스터(booster)에 대한 시뮬레이션 결과는 제안된 제어 기법의 타당성을 보여주고 있다.

• 한국철도학회논문집
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• 제11권5호
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• pp.499-503
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• 2008

교류전기철도 구간의 전차선과 급전선은 동일한 전철주에 설치된다. 전철주는 전차선과 급전선으로부터 각기 다른 하중을 받는다. 이러한 사실을 기본으로 새로운 형태와 재질의 급전선 금구를 고안하였다. 강관으로 디자인된 급전선 금구의 안전성을 FEM program을 통하여 시험하였다. 새로운 강관금구는 경제성측면에서 기존의 금구와 대비되며, 시험결과에서 금전선 금구고 안정적이고 경제적이라는 것을 알 수 있다. 따라서, 본 논문에서 제안한 금구는 VE 기본사항을 수행하였으며, 새로운 지지금구의 형태로 반영이 가능할 것이다.

• 한국정보시스템학회지:정보시스템연구
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• 제30권3호
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• pp.201-216
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• 2021

Purpose The purpose of this study is to analyze the trend of patent technology in textile materials using text mining methodology based on Dynamic Embedded Topic Model and Structural Topic Model. It is expected that this study will have positive impact on revitalizing and developing textile materials industry as finding out technology trends. Design/methodology/approach The data used in this study is 866 domestic patent text data in textile material from 1974 to 2020. In order to analyze technology trends from various aspect, Dynamic Embedded Topic Model and Structural Topic Model mechanism were used. The word embedding technique used in DETM is the GloVe technique. For Stable learning of topic modeling, amortized variational inference was performed based on the Recurrent Neural Network. Findings As a result of this analysis, it was found that 'manufacture' topics had the largest share among the six topics. Keyword trend analysis found the fact that natural and nanotechnology have recently been attracting attention. The metadata analysis results showed that manufacture technologies could have a high probability of patent registration in entire time series, but the analysis results in recent years showed that the trend of elasticity and safety technology is increasing.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.42-49
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• 2022

In recent years, Owner, Architects, and Contractor are increasingly collaborating with each other from pre construction phase in construction projects, which is called Early Contractor Involvement (ECI). In Japan, the ECI method has been introduced in several public building projects since 2015. The purpose of this study is mainly to clarify the characteristics of the ECI method in Japan and to compare the contract clauses of the ECI method in the UK and the USA. The results of the survey are as follows. (1) the ECI method was supposed to make it possible to achieve appropriate quality, cost, and construction period by reflecting Contractor's technology and know-how in the design documents and specifications. (2) According to the database, there were 27 cases of the ECI method in Japan from 2015 to 2021, of which 13 cases for which bidding information could be obtained had a variety of technical proposals, mainly VE proposals, depending on the project characteristics. (3), Japan's ECI method has very much in common with SBC + PCSA in the UK. On the other hand, ECI Method in Japan differs from in the UK in that Owner, Architect, and Contractor enter into a partnership agreement, which is similar to ConsensusDocs CD541 in the USA. (4) The ECI method in Japan has the following problems: Owner depends on Contractor for cost control, the division of roles among project members is complicated, and more work from Owner than the DBB method are required.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2008년도 정기학술발표대회 논문집
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• pp.93-98
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• 2008

해운대 두산 위브 더 제니스는 부산시 해운대구 수영만에 인접한 매립지에 세워지는 건축물로서 현재 지하 터파기 및 일부 기초공사 진행 중인 건축물이다. 타워동의 주 용도는 주거용 건축물로 높이 300m, 층수 80층으로 이루어져 주거용 콘크리트 건축물로서는 동양 최대의 높이를 자랑하고 있다. 타워는 총 3개의 고충타워와 1개의 저층타워로 이루어져 있으며 지하 저층부 길이가 가로폭 230m, 세로폭 200m로 전체가 한 개의 덩어리로 이루어진 구조물이다. 횡력저항 시스템은 중앙의 $700{\sim}800mm$ 두께의 코어벽체가 4방향의 외곽으로 확장되어 있으며 슬래브 외곽주변을 철근콘크리트 기둥을 설치하여 건축적인 요구사항에 부합되면서 횡방향 하중에 아주 효율적으로 저항할 수 있도록 계획되었으며, 풍 진동에 대해서도 아주 만족스러운 결과를 가져다주었다. 슬래브 바닥 시스템은 두께 250mm인 플랫 플레이트를 적용하여 충고의 최소화 및 외주부의 테두리보나 드롭패널을 설치하지 않아 시공성 및 공기단축에 부합되도록 계획되었다. 시공 시 및 준공 후에도 지속적인 상시 모니터링 시스템을 구축하여 계측된 자료를 기준으로 구조물의 안전성과 사용성을 객관적으로 판단하고 검증할 수 있도록 하였다.

• 한국건설관리학회논문집
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• 제13권2호
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• pp.58-69
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• 2012

현대사회는 대도시의 구조물 설계 시 협소한 공간제약을 극복하기 위해 옥상 및 지하공간을 활용하고 있으며, 이에 따라 바닥재의 시공도 증가하고 있다. 바닥재의 미끄럼저항성능은 보행자 및 운전자의 안전성 및 쾌적성 관점에서 대단히 중요한 성능임에도 불구하고, 바닥재의 미끄럼저항성능에 대한 뚜렷한 기준이 없어 개선이 되고 있지 않은 실정이다. 본 논문에서는 국토해양부의 도로안전시설 설치 및 관리지침과 서울시의 서울형 보도포장 미끄럼 저항 기준에 기초하여 미끄럼저항성능의 평가방안을 제시하였다. 세 가지의 우레탄 바닥재 시공법을 선정하여 실험적인 연구를 통해 각 바닥재의 미끄럼저항성능을 분석하고, 제시된 평가 방안에 따라 평가하였으며, VE분석을 통해 세 가지 바닥재 시공법의 성능을 종합적으로 평가함으로써 미끄럼저항성능이 우수한 바닥재가 시공될 수 있도록 독려하였다. 본 논문에서 제시된 평가방법에 따른 VE분석 결과, 미끄럼저항성능이 최대 4배 이상 향상되었던 파티클재료를 첨가한 공법이 83.86의 성능지수를 보임으로써 기타 비교안에 비해 가장 우수한 성능을 나타내었다.