• IEIE Transactions on Smart Processing and Computing
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• 제5권4호
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• pp.289-293
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• 2016

As more mobile devices are equipped with multi-core CPUs and are required to execute many compute-intensive multimedia applications, it is important to optimize the systems, considering the underlying parallel hardware architecture. In this paper, we implement and optimize ray-tracing application tailored to a given mobile computing platform with multiple heterogeneous processing elements. In this paper, a lightweight ray-tracing application is specified and implemented in Kahn process network (KPN) model-of-computation, which is known to be suitable for the description of real-time applications. We take an open-source C/C++ implementation of ray-tracing and adapt it to KPN description in the Distributed Application Layer framework. Then, several possible configurations are evaluated in the target mobile computing platform (Exynos 5422), where eight heterogeneous ARM cores are integrated. We derive the optimal degree of parallelism and a suitable distribution of the replicated tasks tailored to the target architecture.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 추계종합학술대회 B
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• pp.507-510
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• 2008

본 논문에서는 유스케이스 모델링에 사용되는 유스케이스 명세에서 시나리오 편집을 위한 처리방법을 제안하고자 한다. 시나리오 작성에서 자동화된 번호 매기기를 위한 시나리오 단계들 간의 상호작용을 정의하고, 시나리오 저장에 필요한 시나리오 단계와 확장 요소 및 자료구조 식별하고 저장 시 시나리오 단계와 확장간의 관계를 정의한다.

• Structural Engineering and Mechanics
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• 제4권6호
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• pp.613-630
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• 1996

The homogenization method is used to develop a beam element in space for thermo-mechanical analysis of unidirectional composites. Local stress and temperature field in the microscale are described using the function of homogenization. The global (macroscopic) behaviour of the structure is supposed to be that of a beam. Beam-type kinematical hypotheses (including independent shear rotations) are hence applied and superposed on the microdescription. A macroscopic stiffness matrix for such a beam element is then developed which contains the microscale properties of the single cell of periodicity. The presented model enables us to analyse without too much computational effort complicated composite structures such as e.g. toroidal coils of a fusion reactor. We need only a FE mesh sufficiently fine for a correct description of the local geometry of a single cell and a few of the newly developed elements for the description of the global behaviour. An unsmearing procedure gives the stress and temperature field in the different materials of a single cell.

• 대한전자공학회논문지
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• 제23권3호
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• pp.327-339
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• 1986

In this paper, a hardware compiler for symbolic description language(SDL) is proposed for logic design automation. Lexical analysis is performed for SDL which describes the behavioral characteristics of a digital system at the register transfer level by the proposed algorithm I. The algorithm I is proposed to get the expressions for the control unit and for the data transfer unit. In order to obtain the network description language(NDL) expressions equivalent to gate-level logic circuits, another algorithm, the the algorithm II, is proposed. Syntax analysis for the data formed by the algorithm I is also Performed using circuit elements such as D Flip-Flop, 2-input AND, OR, and NOT gates. This SDL hardware compiler is implemented in the programming language C(VAX-11/750(UNIX)), and its efficiency is shown by experiments with logic design examples.

• Structural Engineering and Mechanics
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• 제65권5호
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• pp.611-619
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• 2018

This paper addresses numerical modeling and nonlinear analysis of unreinforced masonry walls and vaults externally strengthened using fiber reinforced polymers (FRP). The aim of the research is to provide a simple method for design of strengthening interventions for masonry arched structures while considering the nonlinear behavior. Several brick masonry walls and vaults externally strengthened by FRP which have been previously tested experimentally are modeled using finite elements. Numerical modeling and nonlinear analysis are performed using commercial software. Description of the modeling, material characterization and solution parameters are given. The obtained numerical results demonstrate that externally applied FRP strengthening increased the ultimate capacity of the walls and vaults and improved their failure mode. The numerical results are in good agreement with the experimentally obtained ultimate failure load, maximum displacement and crack pattern; which demonstrates the capability of the proposed modeling scheme to simulate efficiently the actual behavior of FRP-strengthened masonry elements. Application is made on a historic masonry dome and the numerical analysis managed to explain its structural behavior before and after strengthening. The modeling approach may thus be regarded a practical and valid tool for design of strengthening interventions for contemporary or historic unreinforced masonry elements using externally bonded FRP.

• 정보관리연구
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• 제41권1호
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• pp.145-172
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• 2010

국가행정박물은 일반박물과 같은 물리적 특징을 갖고 있으며, 공공기관이 업무 수행 과정 중에 생산한 것으로 증거적 가치를 지니고 있다. 국가행정박물은 일반 박물 및 문화재와는 내용적으로 구분이 되며, 일반 종이기록물 및 전자기록물과는 그 물리적 성질이 다르므로 관리 프로세스를 정교하게 확장하여야 한다. 이에 이 연구에서는 우리나라 기록물관리법을 근거로 ISAD(G), MODS, RAD, CDWA의 기술요소에서 관련요소를 비교 추출하여 국가 행정박물의 확장된 기술요소를 도출하였다.

• Steel and Composite Structures
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• 제22권6호
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• pp.1337-1358
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• 2016

The current study focuses on the assessment and interface response of reinforced concrete elements with composite materials (carbon fiber reinforced polymers-CFRPs, glass fiber reinforced polymers-GFRPs, textile reinforced mortars-TRM's, near surface mounted bars-NSMs). A description of the transfer mechanisms from concrete elements to the strengthening materials is conducted through analytical models based on failure modes: plate end interfacial debonding and intermediate flexural crack induced interfacial debonding. A database of 55 in total reinforced concrete columns (scale 1:1) is assembled containing elements rehabilitated with various techniques (29 wrapped with CFRP's, 5 wrapped with GFRP's, 4 containing NSM and 4 strengthened with TRM). The failure modes are discussed together with the performance level of each technique as well as the efficiency level in terms of ductility and bearing/ bending capacity. The analytical models' results are in acceptable agreement with the experimental data and can predict the failure modes. Despite the heterogeneity of the elements contained in the aforementioned database the results are of high interest and point out the need to incorporate the analytical expressions in design codes in order to predict the failure mechanisms and the limit states of bearing capacities of each technique.

• 한국구조물진단유지관리공학회 논문집
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• 제11권3호
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• pp.167-175
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• 2007

정밀한 구조물의 상태진단 혹은 안전성 평가는 비파괴 시험의 정밀성(Accuracy), 변이성(Variability) 등과 같은 여러 가지 요소에 의하여 좌우된다. 특히 비파괴 시험을 이용한 측정값과 구조물의 상태에 있어서의 불확실성(Uncertainty)은 정밀한 상태진단에 큰 영향을 미친다. 비파괴 시험을 활용함에 있어서의(간접조사) 신뢰할만한 비파괴 장비라면 현 구조물의 상태(피해면적)를 정확하게 나타낼 수 있어야 한다. 본 논문은 현재 사용이 증가되고 있는 비파괴 장비의 올바른 선택과 정확한 구조물의 안전 진단을 위하여, 비파괴장비의 성능 평가에 있어 확률적 기초를 제공한다.

• 농촌계획
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• 제21권2호
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• pp.63-77
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• 2015

Improve the rural views of the Government and the municipalities with the intention of rural landscape planning. However, rural scenery evaluation of landscape types and element categories, landscape scenes, such as the valuation of resources selected, form a coherent system and ecological point of view is not only a Visual perspective of evaluation, or evaluation is made. This study evaluates the rural landscape through the rural landscape for rurality is implemented can explain the image. Rural amenity 100 represented the rural landscape in rurality with photos of photos, and scenes, photos, location-based rural Vista rurality landscapes drawn components. Selected landscape photography scenic landscapes in the u.s. survey and image vocabularies through surveys is representative of the landscape in rurality of each Vista location-specific photos and images began extracted factors. As a result, the Distant view is a town and village in the rolling hills of the surrounding environment is an image behind the Vista Skyline, Farmland Rural village forests, Behind the hills, Individual housing roof, Housing arrangement, The number of household includes landscape components. Factor analysis 'openness', 'intimacy', 'activity', 'complexity', 'safety' was down to five factors, such as a description of the overall factors that force was 66.45 percent. Middle distance view is close to being out of town houses and village environment, an image in the skyline hills Vista, farmlands, village forests, rolling hills, behind the scenes of the housing component of the neck, the sperm will honor an individual factor analysis results are 'intimacy', 'safety', 'openness', 'specificity', 'complexity' five factors the whole description of the capacity factors compared to 67.24 percent. Close-range view is mainly in Vista village embraced the individual elements and an image of a harmonious location in the surroundings of the sperm, individual houses, fences, gates, courtyard, Garden, garage, agricultural facilities, including, but not limited to, factors assay but an 'intimacy', 'complexity', 'safety', 'activity', 'openness' five factors, such as a description of the overall factors that force was 65.29%. This research seeks to determine the extent to which rurality of rural landscape Vista by location attributes and elements and representative officer in photo selection and rurality to extract the image. To date, followed by a comprehensive study, which was presented through the readjustment could not overlook the Visual elements. The future rural development officer for the evaluation of rural landscape classification and quantitative and objective assessment will have to come up with ways to do.

• 한국비블리아학회지
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• 제30권4호
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• pp.29-50
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• 2019

본고는 링크드 데이터 및 LRM을 반영하여 2019년 RDA가 개정됨에 따라 RDA의 다양한 활용을 위해 RDA 응용 프로파일 작성시 고려사항을 연구하였다. 연구방법으로 문헌연구와 사례연구를 이용하였으며, 연구 결과로 RDA 응용 프로파일 구축시 다음의 고려사항을 제안하고자 한다. 첫째, 응용 프로파일의 내용으로 기존 연구자들이 제시한 항목인 요소명, 요소 ID, 요소 URI, 기술 방식, 출처, 출처값, 요소의 최소 및 최대 기술 횟수, 주기사항 이외에 추가사항으로 반대 요소, 상위 요소, 하위 요소, 도메인, 범주, 레이블의 여러 이름, MARC 매핑, BIBFRAME 매핑, RDA 기술 사례를 제안하였다. 둘째, RDA의 모든 요소별 규칙에는 4가지 기술 방식과 여러 조건과 선택사항이 제시되고 있는데 이를 보다 구조화시켜 응용 프로파일에 적용하기 위해 RDA 규칙 분석을 바탕으로 규칙을 플로우차트로 표현하는 방법과 이를 다시 응용 프로파일로 표현하는 방안을 제시하였다. 셋째, RDA와 BIBFRAME은 내용 표준과 입력 포맷으로서 상호 연계되고, RDA를 내용규칙 사용하는 BIBFRAME 입력기를 작성하기 위해서는 RDA 규칙과 이에 해당하는 BIBFRAME의 상호 연계가 필수이므로 RDA 응용 프로파일의 내용으로 RDA와 BIBFRAME의 매핑 정보를 추가할 것을 제안하였다. 본 연구를 통해 RDA 응용 프로파일 구축 방안을 모색할 수 있을 것이며, RDA 내용규칙을 바탕으로 한 BIBFRAME의 프로파일 작성에도 기여할 수 있을 것이다.