• Journal of the korean academy of Pediatric Dentistry
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• v.31 no.4
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• pp.665-670
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• 2004

The mandibular buccal frenum becomes a problem when its attachment is too close to the marginal gingival. Heavy buccal frenum mucogingivally results in insufficient attached gingiva, inadequate vestibular depth and also difficulty in eruption of mandibular premolar. The aim of this study is to demonstrate the effectiveness of apically positioned partial-thickness flap as adequate method in order to remove heavy buccal frenum and expose impacted teeth. The author presents the case of a 12-year-old boy. He had problems that was prolonged eruption of #34, #35 due to high pull buccal frenum. After space regaining for normal eruption of #34, #35, we performed apically positioned partial-thickness flap on #34, 35 area. As a results, we confirmed that eruption of #34, #35 has been processed normally And vestibular depth, position of buccal frenum and width of attached gingival was within a normal range. Decrease in muscle pull, adequate width of attached gingiva and increased vestibular depth can be expected from this treatment.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.484-488
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• 2007

연극이라는 것은 복합적인 표현예술장르로 하나의 요소가 아닌 여러 가지의 요소들아 합쳐져 연극이라는 예술작품을 만들게 되어 있다. 현대의 연극공연에서 영상의 비중은 날로 높아지고 있다. 무대 공간의 공간감, 협소함, 표현의 제약 등을 따져 볼 때 그것은 당연한 이유일지도 모른다. 연극이라는 것은 최종적으로 배우와 관객과 함께 호흡할 때 완성되는 것으로 배우의 연기에 따라 영상도 실시간으로 반응할 수 있어야한다. 이러기 위해서는 영상뿐만 아니라 배우와 인터렉션할 수 있는 영상의 제어 또한 상당부분 생각하지 않을 수 없다. 그리고 무대의 뜨거운 조명과 그 아래의 영상은 같은 빛으로 만들어진 작품이기 때문에 빛이라는 환경적 요인에서 벋어나지 못한다. 그 밖의 스크린의 존재와 무대의 조형물과의 조화 등도 생각해야 한다. 하지만, 연극의 성공은 관객의 몰입정도에 따라 결정된다. 몰입요소는 음악, 배우, 무대 등의 기존 연극요소가 있으며 여기에 영상 활용은 관객을 더욱 연극으로 몰입시킬 수 있는 또 다른 중요 표현방법이 된다. 그 영상의 활용방안과 문제점은 현재 여러 기술과 방법으로 해결되어지고 있으며, 연극에서 사용되는 영상은 더욱 발전 가능성과 활용 가치를 가지고 있다. 본 논문 이러한 대중문화인 연극에서 공간에서의 영상 미디어 활용의 중요성과 관객의 몰입에 관한 발전 가능성에 대한 연구이다.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1999.06a
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• pp.265-268
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• 1999

경량 건축소재는 협소공간의 고도 이용과 건설 분야의 양적, 질적인 측면에서 급속한 성장으로 건축자재의 경량화, 고급화 및 다양화를 요구하고 있으며 이에 PE, PP, PS, PVC 등의 플리스틱 foam 및 저밀도 콘크리트 등의 경량 건축 소재에 대한 연구가 지속되고 있다. 경량 건축소재로 사용되는 플라스틱류는 대부분 난연화 및 강도유지를 위해 난연제, 섬유 및 무기충진제 등를 첨가하거나 고밀도화하여 사용하며 경량화를 위해 foaming agent를 사용하여 기포를 발생시켜 경량화하여 성형된다. (중략)

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.197-201
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• 2003

플라스틱 제품은 경량이며 내후성, 내구성, 방음성, 단열성, 절연성 등이 우수하고 또한 발포가공에 의해 원료 폴리머의 사용량을 저감시켜 생산원가를 줄일 수 있다는 커다란 장점이 있다. 그러나 물리적인 강도, 가연성, 내열성 등의 한계점 때문에 그 용도가 제한되고 있는 실정이다. 형상 변경이 비교적 용이한 경량 구조체를 이용한 건축소재는 협소공간의 고도 이용과 건설 분야의 양적, 질적인 측면에서 급속한 성장으로 건축자재의 경량화, 고급화 및 다양화를 요구하고 있으며 이에 polyurethane, polyethylene, polystyrene 등의 플리스틱 및 foam 형태의 저밀도 고분자 건축소재의 사용이 급증되고 있다.(중략)

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.10
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• pp.761-770
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• 2017

The objective of this study is to propose a community facility design for the revitalization of the piloti spaces of deteriorated low-rise residential blocks. For this study, the precedent research and institutional limitations are examined. In addition, this study selected and analyzed a deteriorated low-rise residential block utilizing pilotis. Generally, in this type of residence, 8 to 10 generations live together in multi-family houses and row houses, so it is a type of housing that lacks both public space and parking places. Therefore, we attempted to improve the situation of the communities by making use of the space between the pillars and walls without infringing on the parking places. In addition, we took into consideration the design and arrangement of the piloti by evaluating the inconveniences and needs of the residents through interviews. Specifically, various modules were planned and used to transform the spaces between the pillars of the pillar type piloti structure. This study examined the possibilities offered by various materials and modules, and studied the diverse possibilities that can be offered by changing the modules.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.3
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• pp.591-598
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• 2016

The final step of driving a car is parking, which is the most difficult part for people learning to drive. Parking in narrow parking spaces is difficult for both ordinary drivers and beginners. To solve this problem, the development of SPAS (Smart Parking Assist System), ACC (Automatic Control System) improves the convenience of drivers. In addition, parking assistance systems have been developed to recognize more accurately the surrounding environment to the driver using the ultrasound, camera, thermal camera, and radar. This paper proposes the reverse turning radius to process images as if the camera is located in the center of the vehicle regardless of the actual camera position. In addition, it generates the parking guidelines through verification using the vehicle.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.2
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• pp.120-127
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• 2008

This paper proposes a new vector control method using two rectangular hall sensors instead of using the expensive encoder and resolver. The proposed method estimates the speed and motor position by using the quadruple of two hall sensors signals instead of encoder signal. The proposed new speed estimation method is stable under the rated speed range. This algorithm will be able to moderate prices of the whole system and apply to the condition unfitted with encoder and resolver.

• Tunnel and Underground Space
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• v.12 no.3
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• pp.152-157
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• 2002

Optimal design of the long tunnels with large cross sections essential for the effective development of the limited land in Korea becomes more and more difficult owing to the constantly changing social, economic, environmental and technological factors. Deficiency of the domestic research works till now on the elementary topics on tunnel ventilation retards progress on developing the key technologies urgently required for designing and managing the long and large tunnels. This paper aims at identifying the subjects on which research must be carried out for the construction and management of vehicle tunnels in Korea by means of scrutinizing the contents of the publications since 1991 at the International Symposium on Aerodynamic and Ventilation of Vehicle Tunnels, the only international conference on the tunnel ventilation.

• Fire Science and Engineering
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• v.24 no.5
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• pp.122-127
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• 2010

There are 1,550 small or large traditional markets in the whole country. They have many dangerous elements of fire, because of using various electrical products in poor and small space. Recently, government has supported the modernization of traditional market. But, only 50% of them has modernized. There has always been high level of fire risks because of the both modernized and nonmodernized facility are not fit for "Technical Standards on Electrical Facilities". Accordingly, we examined electrical facility setting and use about modernized and non modernized traditional markets which has ever been fired.

• Journal of Advanced Marine Engineering and Technology
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• v.37 no.2
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• pp.178-182
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• 2013

In mining and its similar industries, compact excavators are used commonly in narrow working spaces, of which bucket must be rotated essentially. Considering of those applications, many kinds of the compact excavators have been developed, but any stress evaluation of bucket rotating part had not been attempted. In this study, using of the finite element method and Spare solver, stress analysis has been performed on the bucket rotating parts and its adjacent parts of compact excavator, with using an excavation stress model, in various directions and positions. Resultantly, it has been defined that stress of connector in the rotating part is a little higher, due to its shape, than those remained parts of which stress are shown equally as 1 MPa. Especially in the moving parts, the stress of bucket pin and rotating pinion gear has been calculated as 7.7 MPa and 40 MPa respectively.