• Journal of information and communication convergence engineering
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• 제11권1호
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• pp.50-55
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• 2013

In this paper, we propose a parallel intra-operation unit and a memory architecture for improving the performance of intra-prediction, which utilizes spatial correlation in an image to predict the blocks and contains 17 prediction modes in total. The design is targeted for portable devices applying H.264/AVC decoders. For boosting the performance of the proposed design, we adopt a parallel intra-operation unit that can achieve the prediction of 16 neighboring pixels at the same time. In the best case, it can achieve the computation of one luma $16{\times}16$ block within 16 cycles. For one luma $4{\times}4$ block, a mere one cycle is needed to finish the process of computation. Compared with the previous designs, the average cycle reduction rate is 78.01%, and the gate count is slightly reduced. The design is synthesized with the MagnaChip $0.18{mu}m$ library and can run at 125 MHz.

• 한국통신학회논문지
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• 제15권8호
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• pp.648-658
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• 1990

음성 인식에 있어서 계산 속도를 보다 빠르게 하기 위한 여러 방법중에 systolic array를 이용하여 multiple processign하는 방법이 있다. 이러한 systolic array의 각 연산은 pipeline 방식으로 수행되며, 이 연산은 Processing Element(PE)로 multiprocessing되어 계산 효율을 증대시키게 된다. 이 DTW용 PE cell은 크게 세가지의 블록으로 대별된다. 즉 MIN block, ADD block 그리고 ABS block인데, 본 연구에서는 이들 세가지 블록중 "ADD"와 "ABS" 대한 회로설계및 검증을 행하였으며, 3$\mu$m CMOS N-well 설계 규칙에 따라 두 블록에 대한 각각의 레이아웃과 전체 레이아웃을 설계한 후 설계 규칙 검사(DRC)를 마쳤다. 설계 규칙 검사(DRC)를 마쳤다.

• Journal of Computational Design and Engineering
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• 제2권4호
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• pp.206-217
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• 2015

This paper presents a complete S-shape feed rate scheduling approach (CSFA) with confined jerk, acceleration and command feed rate for parametric tool path. For a Non-Uniform Rational B-Spline (NURBS) tool path, the critical points of the tool path where the radius of curvature reaches extreme values are found firstly. Then, the NURBS curve is split into several NURBS sub-curves or blocks by the critical points. A bidirectional scanning strategy with the limitations of chord error, normal/tangential acceleration/jerk and command feed rate is employed to make the feed rate at the junctions between different NURBS blocks continuous. To improve the efficiency of the feed rate scheduling, the NURBS block is classified into three types: short block, medium block and long block. The feed rate profile corresponding to each NURBS block is generated according to the start/end feed rates and the arc length of the block and the limitations of tangential acceleration/jerk. In addition, two compensation strategies are proposed to make the feed rate more continuous and the arc increment more precise. Once the feed rate profile is determined, a second-order Taylor's expansion interpolation method is applied to generate the position commands. Finally, experiments with two free-form NURBS curves are conducted to verify the applicability and accuracy of the proposed method.

• 한국산업융합학회 논문집
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• 제26권4_2호
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• pp.649-656
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• 2023

Recently, global warming has become severe, and regulation is established for carbon savings each field. its regulation is applied to various fields using IC engine such as automobile, ship, agricultural machine. Therefore engine block applied Common Rail Direct Injection(CRDI) technology, that carry out thermal-structure analysis to examine design. The thermal load about 900℃ by explosion was applied in cylinder. And pressure about 9 MPa(90 Bar) was applied to structure analysis. As a result, it was the highest at 185.99℃ at the top of cylinder. Static-structure analysis applied thermal load, that was shown maximum equivalent stress at 142.59 Mpa and Maximum principal stress 145.03 MPa, Minimum principal stress -149 MPa. When compare analysis results to material property, it design is safety structurally.

• 대한전기학회논문지:시스템및제어부문D
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• 제51권1호
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• pp.1-7
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• 2002

This paper proposes a algebraic parameter determination of MRA(Model Reference Adaptive Control) controller using block Pulse functions and block Pulse function's differential operation. Generally, adaption is performed by solving differential equations which describe adaptive low for updating controller parameter. The proposes algorithm transforms differential equations into algebraic equation, which can be solved much more easily inn a recursive manner. We believe that proposes methods are very attractive and proper for parameter estimation of MRAC controller on account of its simplicity and computational convergence.

• 한국산학기술학회논문지
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• 제20권2호
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• pp.43-50
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• 2019

2018년 12월 세계 최초로 5G 출시 등 대한민국은 전 세계 IT시장을 주도하고 있다. 그러나 국내의 사용자들은 공인인증서의 불편함, 익스플로우와 다른 여러 브라우저와의 비호환성 문제 등 사용자 환경과 시스템 환경의 기술 요소 문제는 투자비용의 이중화, 정보서비스의 품질저하 등 정보서비스에 대한 비판도 날로 혹독해지고 있다. 그럼에도 불구하고 국내 IT 산업은 꾸준히 발전하고 있으며 전 세계 IT 시장의 화두로 자리 잡은 블록체인이 신뢰받는 차세대 융합 정보 핵심 기술로그 활용에 대한 관심이 주목되고 있다. 블록체인은 '강한 보안성', 동일한 원장의 원본을 공유하는 '분산화', IoT, 로봇, AI 등을 연결하는 '초연결성'이라는 특징으로 인해 '신뢰가 강력히 요구되는' 공공기관에서는 블록체인을 활용한 기술 도입에 매우 긍정적이다. 대학의 정보서비스 설계도 예외는 아니다. 대학에서도 대학 내 다양한 정보서비스를 구현하는 기초 발판을 블록체인을 이용한 정보서비스 개발에 기여하고자 많은 고심과 그 활용에 적극 대처하고 있다. 본 논문에서는 다양한 산업군에서 활용되는 블록체인 적용 사례 경험을 토대로 대학 내 다양한 정보시스템을 통합 구성하는 통합정보서비스 교육 플랫폼 실증 모델을 설계한다. 대학 정보서비스를 기획에서 실제 서비스 설계까지 기초로드맵을 블록체인 기반으로 구성하고 이를 실제 대학 내 통합 정보시스템 실증 모델 설계에 적용하여 블록체인을 활용한 대학 내 통합정보서비스 모델을 제시한다.

• 한국주거학회논문집
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• 제12권4호
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• pp.195-203
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• 2001

The purpose of this study is to analyze the characteristics of Mario Botta's residential design. The characteristics of Mario Botta's residential design are following as : 1. The residential design of Mario Botta planed from 1960' to 1970's is based on the style composition method of modern design, specially by the influence of Le Corbusier and Louis I. Kahn. Botta's residential design of the 1980's is generally affected by A. Palladio, and is characterized as the representation of classic standard. The residential design of the 1980's shows the establishment level of Mario Botta's residential design, and produces particular Botta's facade. 2. The characteristics of Mario Botta's spatial composition on residential design could be implicated by the spatial distribution of each floor which is divided by three floors, simple and primitive volume which has a symmetry, opening through the massive elimination n the center of front, double skin, the contrast between void and solid, and the inflow of light through the top-light. 3. Most Botta's residential designs have Loggia in the center of facade working as a buffer space which joins outside and inside space together. They also lead the spatial continuous flow. The inside space is combined by the light coming through top-light and vertical opening. 4. They have high accomplishment in complicating details. They show the outside design of a horizontal belt according to the module of concrete block and the decorated design using compositional materials such as an unevenness piled up askew concrete block .

• 대한전기학회:학술대회논문집
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• 대한전기학회 1994년도 하계학술대회 논문집 A
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• pp.156-158
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• 1994

The analysis of the thin lamination model of the amorphous transformer by FEM requires many region, divisions and much calculating tine, and it has difficulty in calculating for mordern computer. A new method which is simulated by a solid but anisotropic block with the magnetic permeabilities in two orthogonal directions selected to account for the presence of the laminations. [1] Based on this equivalent anisotropic block model, we analyzed the iron loss of the amorphous transformer by FEM, and presented an optimal design example of core dimensions for minimizing the iron loss.

• 마이크로전자및패키징학회지
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• 제24권4호
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• pp.91-95
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• 2017

Package-On-Package (PoP) technology is developing toward smaller form factors with high-speed data transfer capabilities to cope with high DDR4x memory capacity. The common application processor (AP) used for PoP devices in smartphones has the bottom package as logic and the top package as memory, which requires both thermally and electrically enhanced functions. Therefore, it is imperative that PoP designs consider both thermal and power distribution network (PDN) issues. Stacked packages have poorer thermal dissipation than single packages. Since the bottom package usually has higher power consumption than the top package, the bottom package impacts the thermal budget of the top package (memory). This paper investigates the thermal and electrical characteristics of PoP designs, particularly the bottom package. Findings include that via and dense via-cluster volume have an important role to lower thermal resistance to the motherboard, which can be an effective way to manage chip hot spots and reduce the thermal impact on the memory package. A Cu block and dense via-cluster layout with an optimal location are proposed to drain the heat from the chip hot spots to motherboard which will enhance thermal and electrical performance at the design stage. The analytical thermal results can be used for design guidelines in 3D packaging.

• 응용통계연구
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• 제10권1호
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• pp.15-27
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• 1997

Randomized block design (RBD) with three replication is very frequently adopted in agricultural experiments of the Rural Development Administration of Korea. Even though it works well in field trials of traditional crops, it may not accomodate trial site conditions and/or experimental environment. In this research report, we deal with two such cases. The first case is for a crop experiment in green houses. In house conditions, RBD may not be appropriate since it cannot reflect two directions of the yield gradient. So, a Latin square design is suggested as an alternative. The second case is for local field experiments of the newly-inbred rice. RBD with three replications is used without doubt for decades, even though the site layout is not appropriately shaped for the design. In this case, we suggest the RBD in two blocks with multiple replicates for control varieties as an alternative. To improve the quality of statistical experimental designs in over one-thousand agricultural trials performed annually in the Rural Development Administration, we need to re-train agricultural researchers on the design and analysis of experiments and call for concerns of Korean statisticians.