• 한국통신학회논문지
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• 제19권6호
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• pp.1107-1114
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• 1994

본 논문은 적합성을 만족하는 프로토콜 변환 방법에 메시지간의 의미관계를 추가하여 프로토콜 변환기를 생성하는 방법을 제시한다.. 특히, 제안된 방법은 정형화된 기법과 하향식 방법을 도입하여 서로 다른 포로토콜로 구현된 컴퓨터 네트워크 사이의 프로토콜 불일치를 해결하는 효율적인 최다(maximal) 변환기를 유도한다. 따라서 제시된 방법을 사용하여 변환기를 유도할 경우, 불필요한 상태나 전이들의 상당 부분이 쉽게 제거된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(II)
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• pp.301-304
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• 2005

The waterproofing in slab and wall of underground structure, have a couple of construction methods which are inside waterproofing methods for inner surface, and outside waterproofing methods for out wall and slab surface waterproofing. In resent years, however, it has been adapted the inside waterproofing construction method, as increasing of construction expenses cost and low workability and technology, nevertheless, outside waterproofing has set a most high value construction method. In inside waterproofing construction method, it is difficult to repair and assure durability and safety for concrete which has direct water-press. So, It is necessary for adopt the outside waterproofing method.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.87-96
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• 2010

PAP method is a combined measures which consist a anchored retaining wall method with permanent ground anchors and vertical precast concrete panels, step by step on the slope surface. And soil is back filled between slope and vertical precast panels. Therefore, this method is more effective than any other ground anchor reinforcing methods of slope stability, for example cross type concrete block ground anchor or buttress concrete block ground anchor method. Because of increasing effective anchor force and green tree planting.

• 한국소음진동공학회논문집
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• 제18권1호
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• pp.94-100
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• 2008

Noise barriers are being used more often to solve problems of noise pollution from traffic noise. Several types of noise barriers are being installed to increase the cost-effectiveness of noise barrier installation. In this study, the insertion loss is analyzed to evaluate the effectiveness of the noise barrier by using the BEM. In order to check the validity of the BEM, the BEM and Lam's theoretical analysis are compared with measurement, which is performed in the anechoic chamber for the 1/10 scale-down model, and good agreements are obtained. By using the two dimensional boundary element method, the insertion loss is calculated and analyzed for several typical noise barriers such as the vertical barrier, the barrier with an oblique edge on top, the T-shaped barrier and the barrier with interference device on top. With these analyses, it is possible to design more cost-effective noise barriers appropriate for a particular area.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (B)
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• pp.715-717
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• 2004

This paper proposes a new reconstruction method of high-resolution facial image from a low-resolution facial image based on a recursive error back-projection of top-down machine learning. A face is represented by a linear combination of prototypes of shape and texture. With the shape and texture information about the pixels in a given low-resolution facial image, we can estimate optimal coefficients for a linear combination of prototypes of shape and those of texture by solving least square minimization. Then high-resolution facial image can be obtained by using the optimal coefficients for linear combination of the high-resolution prototypes, In addition to, a recursive error back-projection is applied to improve the accuracy of synthesized high-resolution facial image. The encouraging results of the proposed method show that our method can be used to improve the performance of the face recognition by applying our method to reconstruct high-resolution facial images from low-resolution one captured at a distance.

• 국제학술발표논문집
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• The 7th International Conference on Construction Engineering and Project Management Summit Forum on Sustainable Construction and Management
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• pp.133-137
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• 2017

Nuclear power plants in Korea are usually built based on a duplicated model; so the project cost data of the preceding unit can be used as reference when estimating the project cost for the succeeding unit. However, since the contracting method is oriented towards the price, empirical factors such as making top-down estimations using the reverse calculation method based on the completion cost of the preceding unit is dominant. In order to develop a project cost database to resolve such problems, the detailed cost boundary of the project cost data must be categorized by project and by system. This study proposes a method to connect the code of account with the base quantities and the IAEA account, and proposes a database structure for the development of a project cost estimation system. The estimation system developed in the future is expected to utilize the proposed project cost data structure.

• 대한교통학회지
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• 제29권5호
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• pp.55-65
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• 2011

본 연구는 교통부문의 지속가능성 평가를 위한 온실가스 배출량 산정 방법론 별 비교분석을 목적으로 하였다. 배출량 산정 방법론은 UN IPCC에서 제시하였으며 유류판매량을 기본으로 한 하향식 방식(Tier1,2)과 이동원의 속도 및 교통량 자료를 활용한 상향식 방식(Tier 3)이 있다. 방법론에 따른 결과 분석을 위하여 분석 대상지역을 선정하였다. 선정기준은 한국교통연구원에서 수행한 지자체별 지속가능교통 평가결과에 근거하여 지속가능성 1등급 지역 중 하나인 과천시와 7등급 지역인 안성시를 대상으로 분석하였다. Tier 1 방법론을 통해 도출된 온실가스 배출량($CO_2$ 기준)은과천시의 경우 74,813ton/yr, 안성시는 584,125ton/yr로 나타났다. Tier 3 방법론 적용 결과 과천시 91,462ton/yr, 안성시 163,801ton/yr로 나타나 과천시의 경우 Tier 1 방법론보다 22.3% 과대추정 되는 결과가 도출되었다. 반면, 안성시의 경우 Tier 3 방법론을 적용하였을 때 온실가스 배출량이 3.5배가량 줄어드는 결과가 도출되었다. 따라서 본 연구를 통해 온실가스 배출량 산정 방법론에 따라 지속가능교통 지수에 의한 지자체별 등급이 다르게 평가될 수 있다는 것을 확인할 수 있었다.

• 대한치과보철학회지
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• 제59권4호
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• pp.478-486
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• 2021

치과와 기공실을 오가며 복잡하게 진행되는 기존 CAD-CAM 컴퓨터 가이드 제작 방식을 단 순화하기 위하여, 진료실에 설치한 바로가이드 시스템(VARO Guide, CAD, Pre-Guide, VARO-mill, NeoBiotech, Seoul, South Korea)을 통하여 Top-Down 개념과 수복 주도개념을 적용하여 1-day 수술과 임시보철을 완료하는 증례를 보고하고자 한다. Pre-Guide를 통해 환자의 중심위에서 교합을 채득하고 CT를 촬영하며, 진료실 내 컴퓨터에서 CAD를 통해 바로가이드를 1시간 내에 제작하였다. 미리 제작된 광중합 레진이 담긴 Pre-Guide 트레이를 술부에 위치시킨 후 중심위에서 CT를 촬영하였다. CT 데이터가 진료실 내 컴퓨터로 전송되면 수복 위치를 정한 후 이어서 3차원적으로 턱뼈에서 임플란트를 식립할 위치를 디자인하여 STL 파일로 추출하였다. 그리고 진료실에 설비된 밀링 기계(VARO-mill)에 Pre-Guide를 고정하여 수술용 가이드를 15분 내에 제작한다. 이 가이드로 환자는 한번 내원하여 임플란트를 계획한 위치에 안전하고 정확하게 수술해 줌과 더불어, 초기고정력이 양호한 임플란트에 대해서는 즉시임시치아까지 장착해 주어 환자에게 즉시 기능이 가능하도록 할 수 있었다.

• 한국항해학회지
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• 제19권3호
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• pp.29-34
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• 1995

IEC and CISPR have continuously endeavored the measurement method of Immunity Test as international unification, but not established yet. The main reason is that the measurement method and the normalization of threshold to obtain the complicated parameters for Immunity Test are difficult. Thus, the Immunity Test Setups are used differently according to the measured electromagnetic environments. This study developed an Immunity Test System and Algorithm for measurement software suitable for IEC801-3 Regulatons using ready-made amplifier, signal generator, and developes interconnecting interface board interacting with other appratus i.e., RF Switch, Power Meter, Field Sensor and Pre-amp. We are to develope an automated software using Top/Down and OOP(Object Oriented Programming) method.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2006년도 춘계학술대회 논문집
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• pp.119-122
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• 2006

In this study, bottom-up type powder processing and top-down type SPD (severe plastic deformation) approaches were combined in order to achieve full density of 1 vol.% carbon nanotube (CNT)-metal matrix composites with superior mechanical properties by improved particle bonding and least grain growth, which were considered as a bottle neck of the bottom-up method using the conventional powder metallurgy of compaction and sintering. ECAP (equal channel angular pressing), the most promising method in SPD, was used for the CNT-Cu powder consolidation. The powder ECAP processing with 1, 2, 4 and 8 route C passes was conducted at room temperature. It was found by mechanical testing of the consolidated 1 vol.% CNT-Cu that high mechanical strength could be achieved effectively as a result of the Cu matrix strengthening and improved particle bonding during ECAP. The ECAP processing of powders is a viable method to achieve fully density CNT-Cu nanocomposites.