• Bulletin of the Society of Naval Architects of Korea
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• v.32 no.4
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• pp.57-63
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• 1995

극지개발을 위해서는 극지의 혹독한 자연환경을 대상으로 하는 과학지식과 극지에서 사용되는 특수시설과 장비를 설계, 시공 그리고 운용하는 공학기술이 요구된다. 극지관련 공학기술은 저 온용재료 관련기술, 도로나 교량, 건축물과 같은 극한지 천연자원의 시추와 생산, 수송을 위한 해양구조물과 파이프라인 관련기술, 그리고 얼음의 재료특성에 관한 이론 및 실험으로 크게 구 분할 수 있다. (Table 1). 극지용 구조물과 빙해항행선박 (쇄빙선) 은 일반 해역에서 운용되는 구조물에 비해 형상, 구조강도, 의장, 저온특수설비 등에서 새로운 개념의 기술이 요구되기 때 문에 금후 국내 조선해양산업계가 지향해야 할 고도의 기술집약형 건조물이다. 또한 최근 들어 국내에서도 시베리아 천연자원의 해상운송을 위해 빙해역을 운항할 수 있는 유조선이나 일반 화물선을 확보해야할 필요성이 대두되고 있으며, 또한 국내 조선업계의 생산기술이 비약적으로 발전함에 따라 외국으로부터의 빙해항행선박의 수주도 이루어지고 있으나 아직 이들 선박의 설계를 위한 독자적인 기술은 미흡한 현실이다. 극지개발은 이론적 접근과 함께 실험에 의한 신뢰성 있는 자료를 축적해야 한다. 이를 위해서는 빙해수조(,ice model basin)의 건조나 빙역학 실험을 위한 냉동실험실 (cold room)의 건립을 위한 초기투자가 절실히 요구되며 산업계의 수 요에 따른 포괄적인 산학협동연구가 진행되어야 할 필요가 있다. 빙해수조와 냉동실험실은 빙 해역에 직접 접하지 않은 국가에서 극지공학 연구에 참여하기 위한 필수적인 시설인데 table 2에 대표적인 빙해수조의 설치장소와 규모에 대하여 정리하였다. 이 글은 우리 나라가 쉽게 접할 수 없는 극지환경을 이해하고 가까운 장래에 예상되는 수주경쟁에 대비하여, 국내외의 극지개발 동향을 분석하고 이에 대한 국내의 극지관련 연구의 현황과 앞으로의 전망을 살펴보기 위하여 준비된 것이다. 이 글에서는 극지공학 일반보다는 조선해양분야에 관련된 내용만으로 국한한다.

• Fire Science and Engineering
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• v.28 no.5
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• pp.30-36
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• 2014

The pressurized smoke control system in the vestibule is important for fire safety in buildings because it is concerned with egress time of people and the safety of fire fighters. The vestibule pressurization system can prevent smoke from entering the vestibule using differential pressure when fire doors are closed and using the egress velocity when fire doors are open. Air supplying units in the vestibule need to be arranged by taking account of the location of doors and the volume of the vestibule in order to assure the uniform air egress velocity through a fire door when it is open. In this study, computational fluid dynamics (CFD) simulations were conducted for the vestibule where multiple doors are installed and it was found that the reverse flow occurs when the damper position in vestibule is not appropriate.

• Journal of the Korea Concrete Institute
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• v.14 no.1
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• pp.16-23
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• 2002

In construction field, million tons of demolished concrete are produced in korea. It is urgently needed that they are used as recycled materials in order to prevent environment pollution and gain economic profits. However, existing recycling methods of demolished concrete have their limits for wide application. They have been only focused on the burying and banking. Therefore, in this paper, physical and mechanical properties of planting concrete using construction wastes for aggregates are described in order to investigate the validities of demolished concrete as recycled aggregates. The Properties of strength and durability are tested. According to the experimental results, compressive strength and freeze-thaw resistance of planting concrete using recycled aggregates shows worse performance than those using crushed stone concrete. But, it shows positive performance on the absorption ratio and thermal conductivity. Especially, considering the side of recycling of concrete wastes, it is recommended that recycled aggregates made with construction wastes is applied to planting concrete.

• Korean Journal of Construction Engineering and Management
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• v.4 no.1 s.13
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• pp.90-96
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• 2003

The purpose of this study is to present an improvement building construction process by using prefabricated materials. The current slab form work has waste factor by unnecessary process and not complete integration with the finishing process. Therefore the study used value stream analysis methodology for effective improvement of slab form work process. The main contents of the study are as follows; 1) Non-value adding activities were found at existing slab form work process by current state mapping(CSM) 2) Future state mapping(FSM) suggest process Integration to slab form work. 3) Slab form work is analyzed reduction time-cost by prefabricated material. The study recommends that, as a future research, development of tool and technique for the non-value adding activities are eliminated in building construction and application of prefabricated material should be increased.

• Korean Journal of Construction Engineering and Management
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• v.9 no.4
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• pp.84-91
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• 2008

"Eco-friendly construction" is an emerging issue in the building industry. Main purpose of the eco-friendly construction is to sustain the health and environment of building residents and to minimize the harmful effect on their environment. Apartment residents have great concern on eco-product, since many cases are reported that Sick Building Syndrome is caused by toxic substance from building materials. Environmental performance is to meet through using the highest grade eco-friendly materials. However, generally eco-friendly materials are more expensive than normal materials, Therefore, using eco-friendly materials at public housing project is limited to economical aspect. The purpose of this paper is development of eco-friendly material selection model considered cost efficiency. The selection of Eco-friendly finishing materials and their methods are constructed to consider environmental performance level and cost index compositively. Development of eco-friendly material selection method is economic and reasonable one when public housing is constructed.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.553-557
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• 2007

In general, material cost of a construction project is more than 30$^{\sim}$40% of total construction cost, thus on site material control is very important. The factthat buildings have recently become higher and bigger also increases the importance of on site material control. However, on site material control has not been considered as an important management issue. This study classifies building construction materials considering the material delivery characteristics such as ETO, ATO, MTO and MTS and the unique characteristics of each materials. Using the classification, this study examine the requirements for on site material control of each materials. Finally, this study suggests on site material control systems for each construction material.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.691-694
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• 2007

Today, current society is unceasingly changing. This phenomenon accelerate building to high-rise and complex. According to that, to build a construction structure, the safety management facilities, safety education & training for employee and consciousness for safety should be set aside. But, the occurrence of safety injury is not decreasing now. Therefore, to reduce safety injury and to enhance the consciousness of employee for safety, redesign of safety management system, reallocation of safety liability for privity, revise of safety educational system were suggested in this paper.

• Journal of the Korean association of regional geographers
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• v.10 no.3
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• pp.654-666
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• 2004

The function of officetel has been changed from office use to residential use since 1980s. The construction of officetel was relatively increased in 1991, has been decreased in the middle of the 1991, and has been increased after 1996. This paper is an empirical examination of officetel rent determinants in Seoul. Hedonic regression analysis provides the basic framework for this study. The major rent determinants are the preferable location of buildings, the ratio of private use area to the building area. residential use. The officetel rents are likely to increase at an increasingly rate with respect to these variables. The significant and positive determinants that impact rents is the building story height for the officetel for business use, and the ratio of private use area to the building area for the officetel for residential use.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.5
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• pp.213-218
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• 2016

Music copyright began in 1850 in France and, unlike other copyrighted works such as architecture or arts, which are based on visual conditions, copyrighted music is based the on trends of the times. The appropriate range of protection for musical works is not the entire music, but the part that is determined to be a creative expression deduced from the analysis of the musical structure. Concerning the issue of plagiarism in popular music, the determination of creativity plays an important role in whether a piece of music encroaches on the original copyrighted works or not. However, determining whether a work is an element of a previously copyrighted work should be achieved through a consensus formed by members of the relevant industry and academia rather than the court. The purpose of this study is to classify the creative and non-creative elements of popular music, in order to create a classification that can enable musical creators to provide a consensus on the elements of creative expression.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.6
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• pp.608-613
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• 2002

Experimental transplantation of Eklonia stoionifera to natural rock was carried out using adhesive Blue. A plant was attached to an architecture tile ($10\times$10 cm) with the glue, and then the tile was attached to natural rock with underwater glue. Within one month, the tile were fixed to natural rock with an attachment rate of $75\%$, and 5. stoionifera grew up with an insertion rate of $66.7\%$ on the tile. After two months, number of E. stolonifera on the tile decreased. However, the attached plants were regenerated by new stolons, maintaining good growing condition. After seven months,5. stoloaifera increased 6 to 71 individuals. These results indicate that regeneration of plants was mainly affected by the recruitment of stolen around the plant.