• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1124-1128
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• 2005

The duration of a construction project is not only a key element for taking a new order, but also a strict yardstick to determine certain project successful or not. However, since construction project is basically outdoor job and most of the activities are proceeded out-air, no matter how the schedule plan has been established accurately, actual project proceeds due to the weather condition, beyond anyone's control. In this paper, the functional relationship between work productivity rate and weather elements is suggested by regression analysis. Difference of the relationship and influence of weather due to the seasonal group are also revealed. With these results, by simulating actual weather data and generating weather forecast through historical data, more accurate schedule would be obtained.

• 한국자동차공학회논문집
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• 제10권1호
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• pp.153-161
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• 2002

This paper develops a finite element model for crashworthiness analysis ova small-sized bus. The full vehicle finite element model is composed of 31,982 shell elements,599 beam elements,42 bar elements, and 34,204 nodes. The model uses four material models (such as elastic, elastic-plastic(steel), rigid. and elastic-plastic (rubber) material model) of PAM-CRASH. The model uses four contact types to define sliding interfaces in ten areas. A frontal crash test using an actual vehicle with 30mph velocity to a rigid barrier is carried out. Vehicle pulses at lower part of left and right b-pillar are measured, and deformed shapes of frame and driver seat's lower left area are photographed. A frontal crash simulation using the developed full vehicle finite element model is performed with PAM-CRASH installed in super computer SP2. The simulation is performed with the same conditions as the test. The measured vehicle pulses and photographed deformed shapes from the test are compared to ones from the simulation to validate the reliability of the developed model.

• 한국전산구조공학회논문집
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• 제17권1호
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• pp.1-10
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• 2004

최근, 유한요소해석견과의 신뢰도를 향상시키기 위하여 활발하게 연구되고 있는 적응유한요소해석은 반복계산을 통해서 해석결과의 오차가 사용자에 의해 지정된 허용오차와 같아지도록 하는 해석방법이다. 이와 간은 적응유한요소해석은 해석결과의 오차평가와 이에 따른 유한요소의 재구성과정으로 나누어진다. rp방법에서는 절점의 위치를 이동시켜 요소의 크기를 조절하는 r방법과 형상함수찻수를 증가시키는 p방법을 동시에 적용함으로써 적응해석의 유효성을 향상시키고자 하였다. 제안한 rp방법의 특성을 규명하고 적응해석의 유효성을 보이기 위하여 전형적인 이차원 평면문제들을 해석하고 그 결과를 검토하였다.

• 한국응용과학기술학회지
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• 제32권3호
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• pp.405-411
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• 2015

Carbon composites for flexible fiber heating element were examined to improve the electrical conductivity in this study. Carbon composites using carbon black, denka black, super-c, super-p with/without CNF or dispersant such as BCS03 and Sikament-nn were prepared. Carbon composite slurry was coated on plane film and yarns(cotton, polyester) and the performances of prepared heating materials were investigated by checking electrical surface resistance, adhesion strength. The plane heating element using carbon black under natural drying condition($25^{\circ}C$) had better physical properties such as surface resistance(185.3 Ohm/sq) and adhesion strength(above 90%) than those of other carbon composite heating elements. From these results, polyester heating element coated by carbon black showed better electrical line resistance(33.2 kOhm/cm) than cotton heating element. Then, it was found that polyester heating element coated by carbon black with CNF(3 wt%) and BCS03(1 wt%) appeared best properties(0.604 kOhm/cm).

• 한국게임학회 논문지
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• 제21권2호
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• pp.123-138
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• 2021

본 연구는, 블록체인기술을 접목하여 개발된 게임들이 NFT 기반 게임아이템의 상호 운용성(Interoperability)을 통해 게임서비스의 성과증대와 신 모델 창출 등 비즈니스모델 혁신을 만들어 낼 수 있다는 점을 '플레이댑' 플랫폼에 대한 실증사례 분석을 통해 확인하고자 하였다. 연구를 통해, 블록체인게임의 기술적 혁신성은, 사회경제적, 산업생태계적인 거시적 관점에서 긍정적인 영향력이 있음을 알 수 있었다. 또한 게임 내 자산의 소유권 확보 및 이를 통한 새로운 사업모델의 창출을 통해, 참여개발사 와 플랫폼 제공사 등 기업의 차별화 및 고객편익 증대 부분에서 명확한 영향력을 만들어 내고 있음을 알 수 있었다.

• 한국융합학회논문지
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• 제11권7호
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• pp.73-78
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• 2020

현대 건축과 디자인은 확장적 사고로 타 장르와 융합하는 실험을 보여주고 있다. 본 연구는 건축의 비물질화와 비가시화 표현 수단으로서 그래픽 외피의 활용을 제안하는 데 의의를 둔다. '보이지 않는 건축'을 실현하는 방법은 크게 빛을 조작하는 소재를 이용하는 방법과 눈속임 기법을 바탕으로 하는 그래픽 접근으로 나눌 수 있다. 그중 서울광장 특설무대의 사례는 슈퍼그래픽을 활용해 건축물을 가볍고 투명하게 표현하고, 주변 환경에 방해되는 요소를 시야에서 사라지게 하는 방법을 보여준다. 장식의 수단을 넘어 효과적인 위장(僞裝) 기술로서 슈퍼그래픽 외피가 '보이지 않는 건축'의 시대의 유력한 표현 수단으로 활용되기를 기대한다.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제23권1호
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• pp.15-24
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• 2017

Purpose: Korea is expected to enter an aged society in 2018 and then a super-aged society in early 2025. The country's aging is progressing faster than any other country in the world. However, the foundation of the elderly friendly industry is weak, and measures at the government level are urgently needed. Especially, housing problems of the elderly are one of the most urgent measures to be taken. Korea does not have the minimum residential area standard for the elderly, and the current general minimum residential area standard is based on the survey of the housing situation without scientific evidence. Therefore, both standards need to be revised as soon as possible based on scientific evidence. Methods: The minimum residential area standard has been calculated following Karl H. E. Kroemer's Min or Max design also being called as-single cut and dual cut theory- as the maximum population value and minimum population value theory of Ernest J. McCormick. Therefore there is a need for a formula made using a few key factors, such as corresponding dimension, practical dimension, clearance, spare dimension, integrated dimension. These elements can be defined and used as formulas to calculate minimum residential area standards. Results: Assuming the results of the spatial variability in this study showed that it is possible to raise the standard of living in a terms of sustainable minimum size for the young, old and all residents. Implications: The government should set a minimum residential area standard with scientific grounds and set up a policy improving the life of people who live in an needy residential environment.

• 한국실내디자인학회논문집
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• 제24권4호
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• pp.111-123
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• 2015

This study aims to suggest 'an eco-friendly residential housing design guideline as an elderly housing alternative' by mixing the concept of a 'senior citizen community' housing environment with the concept of an 'eco-friendly' housing environment, based on the directivity of an elderly housing alternative for surviving in a super-aged society and the directivity of a sustainable housing environment for providing against global warming. Basically, this study considered the directivity of 'an eco-friendly residential building as an elderly housing alternative' by analyzing housing environment elements and elements to be considered in an elderly housing environment and setting the directivity of an elderly housing environment, which reflects the change in the design paradigm. In relation to the concept of universal design, for considering the perspective of elderly users, existing elements were compared and major planning elements were applied to the scope of complex planning, communal space and housing unit space. In relation to the concept of eco-friendly design, also, a guideline was re-organized and planning elements were applied to each category by comparing domestic and foreign green building certification systems. Based on domestic and foreign authorized guidelines of universal design and green building certification systems, this study was focused on suggesting an eco-friendly residential housing design guideline as an elderly housing alternative to make users perceive the need for a specific indoor environment design guideline and system.

• 한국실내디자인학회논문집
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• 제26권2호
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• pp.101-109
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• 2017

The food and beverage spaces of modern industrial society have transformed from a simple space for meals into a space of culture, communication and experience as society becomes more complex and diverse along side economic growth. An interior designer who is rapidly rising on this flow of change is Yukio Hashimoto. While working for interior design firm Super Potato, which highlights food and beverage spaces, he was much affected by the expression methods of representative designer Takashi Sugimoto, who makes use of natural elements. By using these expression methods that make use of natural elements in his own creation of spatial ambience and elements of experience and by adding his own differentiated expression methods, he emphasizes an effective spatial expression for food and beverage spaces. The design characteristics of Yukio Hashimoto's food and beverage spaces are as follows. First natural elements like light and water are recreated as memories of nature after being established through a methodology that allows these elements to penetrate his own thoughts. Second, he pursues a hybrid design through the harmony between past tradition and current expressive techniques. Third, he expresses objets of light through a formative sense of shape expressed with light.. Fourth, he establishes an axis in the interior space by light and structure and endows a strong directionality that induces symmetric characteristics, gaze, and movement.. Fifth, he installs lights at the bottom of weighty materials and expresses a sense of floating by light. Sixth, he uses an illusion technique that makes use of the ambiguity and depth of space resulting from reflecting materials like mirrors. The study hopes that such design expression characteristics of food and beverage spaces can be used as data for interior designers to apply and develop a new design vocabulary.

• 자원환경지질
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• 제30권2호
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• pp.89-103
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• 1997

The purpose of this research is to investigate the enrichment and distribution patterns of naturally occurring potentially toxic elements in soils derived from black shales and slates. Soil samples were collected from the Chubu area covered with uranium-enriched black shales and slates of the Changri Formation of the Okchon Super Group, and analysed for multiple-elements using INAA, ICP-AES and AAS. Soil pH and loss-an-ignition were also measured. Trace element contents in black shale and slate of the Chubu area are relatively lower than those in black shales, and higher than those in black slates reported elsewhere (Chon, Jung, 1991; Chon et al., 1996). Soil pH values range from 3.5 to 6.5, and loss-an-ignition values are in the range from 3 to 10%. Potentially toxic elements including As, Ba, Cr, Cu, Mo and U are highly enriched in residual soils with maximum content of $540{\mu}g/g$, $35,000{\mu}g/g$, $280{\mu}g/g$, $300{\mu}g/g$, $240{\mu}g/g$ and $860{\mu}g/g$, respectively. Significant concentrations of those elements were found in soils taken from the Tojangkol, the Chubu tunnel and the Meokti areas. Soils derived from black shales and slates, calcareous and phyllitic rocks, and intrusions were discriminated in terms of As, Ba, Co, Cr, Cu, Mo, Sc and U contents. Enrichment index was calculated using the concentrations of As, Ba, Cr and Mo, and enrichment index map shows very similar trend with U distribution in soils.