• 전자공학회논문지
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• 제49권12호
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• pp.234-241
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• 2012

본 논문에서는 소자의 레이아웃 파라미터로 인한 회로 특성 산포를 개선할 수 있는 새로운 설계 기법을 제안한다. 제안된 설계 기법은 회로 시뮬레이션을 수행하지 않고 칩 내에서 레이아웃에 의한 소자의 전기적 특성 분포를 추출하여 불량 소자를 개선하는 방법이다. 이 기법은 3가지 장점이 있다. 첫째, 현 설계 흐름도에 변화를 주지 않아도 된다. 둘째, 레이아웃 설계자가 고비용의 설계 시뮬레이션을 수행하지 않고 소자의 전기적 특성 산포를 추출할 수 있다. 셋째, 초기 레이아웃 설계단계에서 전기적 불량 소자를 찾아 개선하여 설계 기간 단축에 도움이 된다. 제안한 방법에 대한 효율성을 검증하기 위하여 30나노 DRAM 공정에서 총 9종류의 소자 레이아웃 파라미터에 대해서 모델링을 진행하였다. 레이아웃 설계자를 위한 eDRC 환경을 개발하여 Standard Cell Library 설계에 적용하여 초기 설계단계에서 불량 소자 17.8%를 찾아 2.9%로 줄였다.

• 한국정밀공학회지
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• 제19권1호
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• pp.79-92
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• 2002

This paper describes a research work of developing computer-aided design of a product with bending and piercing for progressive working. An approach to the system for progressive working is based on the knowledge-based rules. Knowledge for the system is formulated from plasticity theories, experimental results and the empirical knowledge of field experts. The system has been written in AutoLISP on the AutoCAD with a personal computer and is composed of four main modules, which are input and shape treatment, flat pattern layout, strip layout and die layout modules. The system is designed by considering several factors, such as bending sequences by fuzzy set theory, complexities of blank geometry, punch profiles, and the availability of a press equipment. Strip layout drawing generated in the strip layout module is presented in 3-D graphic farms, including bending sequences and piercing processes with punch profiles divided into for external area. The die layout module carries out die design for each process obtained from the results of the strip layout. Results obtained using the modules enable the manufacturer for progressive working of electric products to be more efficient in this field.

• 디지털융복합연구
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• 제17권12호
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• pp.467-472
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• 2019

국내 스마트폰 이용률이 증가함에 따라 모바일 게임의 발전 속도도 빨라지고 있지만, 시장 규모가 커짐에 따라 경쟁이 심화되는 현상이 나타나고 있다. 이러한 모바일 게임 시장에서 게임을 성공시키기 위한 요소 중 하나로 UI를 제시하고 있는데, 이러한 모바일 게임 UI 설계 시 이전에 기능과 심미적 표현, 기능중심디자인과 정보 전달과 더불어 사용자의 경험을 설계하는 측면에서 접근되어야 한다는 주장이 제시되었다. 본 논문에서는 UX요소 중 경험을 이용해 효과적인 모바일 RPG의 로비 layout을 제시하였다. Ernest Adams와 Andrew Rollings의 레이아웃 분류 방법을 통해 google play 누적매출 순위 20위 내 모바일 RPG의 9개를 선정해 로비 layout을 분석한 결과 모바일 RPG장르의 첫 시장 흥행을 이끌었던 게임의 로비 layout이 이후 출시되어 흥행한 게임의 기준이 되었다는 결과가 나왔다. 이는 기존 RPG를 이용했던 경험에 의해 낮은 진입장벽과 학습이 불필요 하다는 점에서 이용자가 이전에 이용하였던 게임과 유사하게 느끼는 로비 layout이 효과적이라고 해석할 수 있다. 향후 연구에서는 RPG 이외의 다른 장르에 관한 최적의 UX를 측정할 수 있는 연구가 진행된다면 넓은 장르의 공통적인 layout을 도출해낼 수 있을 것이다.

• 건축역사연구
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• 제23권4호
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• pp.81-90
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• 2014

This paper aimed to identify the variation of layout in Hwangnyoungsa buddhist temple site based on studying published the excavation research paper and texts related to layout. According to earlier studies, in 1st construction period(553~569) of Hwangnyoungsa, there were trisection spaces with one main hall and two corridors in inner part and then in 2nd period(584~645), unified one. But actually trisection spaces had been maintained until the middle part of 8th century. And in each space there was the main hall with large yard. That is the 2nd period layout of Hwangnyoungsa. For the attainment this result, each building remains are judged under duplicated situation which one was the previous and next by consideration of the construction condition and special features of foundation. Although the meaning of trisection system of Hwangnyoungsa is similar with the layout of ancient palace, it could be said to derive from accumulation excavation research in Silla's archeological site and such studies.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 학술대회 논문집 정보 및 제어부문
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• pp.391-393
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• 2004

For performance and stability of a synchronized system, we need an efficient Clock Tree Synthesis(CTS) methodology to design clock distribution networks. In a system-on-a-chip(SOC) design environment, CTS effectively distributes clock signals from clock sources to synchronized points on layout design. In this paper, we suggest the pre-layout analysis of the clock network including gated clock, multiple clock, and test mode CTS optimization. This analysis can help to avoid design failure with potential CTS problems from logic designers and supply layout constraints so as to get an optimal clock distribution network. Our new design flow including pre-layout CTS analysis and structural violation checking also contributes to reduce design time significantly.

• 한국생산제조학회지
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• 제6권1호
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• pp.100-108
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• 1997

Electrostatic precipitator is the equipment that separates dust particles from the gas in which they are suspended. Specially, for the construction of industrial electrostatic precipitator, the corporations would send the layout design to a customer to accept an order. Therefore, it is made a detail drawing after accept ance. Since the layout design of electrostatic precipitator is very complex, it takes time and design errors are included. Thus, for competitiveness in these industries, the development of software for the layout design of electrostatic precipitator is important. In this study, the developed software deals with technical concept and layout design of industrial electrostatic precipitator. By using the software, design time was very short, design errors reduced largely, and the standardization of design could be carried out.

• 한국정밀공학회지
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• 제29권4호
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• pp.469-478
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• 2012

This study aims to discover the optimal pipe layout for a ship, which generally needs a lot of time, efforts and experiences. Genetic algorithm was utilized to search for the optimum. Here the optimum stands for the minimum pipe length between two given points. Genetic algorithm is applied to planar pipe layout problems to confirm plausible and efficiency. Sub-programs are written to find optimal layout for the problems. Obstacles are laid in between the starting point and the terminal point. Pipe is supposed to bypass those obstacles. Optimal layout between the specified two points can be found using the genetic algorithm. Each route was searched for three case models in two-dimensional plane. In consequence of this, it discovered the optimum route with the minimized distance in three case models. Through this study, it is possible to apply optimization of ship pipe route to an actual ship using genetic algorithm.

• 대한산업공학회지
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• 제27권1호
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• pp.54-60
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• 2001

In this paper, a shape-based block layout (SBL) approach is presented to solve the facility layout problem with unequal-area and fixed shapes. The SBL approach employs hybrid genetic algorithm (Hybrid-GA) to find a good solution and the concept of bay structure is used. In the typical facility layout problem with unequal area and fixed shapes, the given geometric constraints of unequal-area and fixed shapes are mostly approximated to original shape by aspect ratio. Thus, the layout results require extensive manual revision to create practical layouts and it produces irregular building shapes and too much unusable spaces. Experimental results show that a SBL model is able to produce better solution and to create more practical layouts than those of existing approaches.

• 한국경영과학회지
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• 제23권4호
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• pp.63-73
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• 1998

With the success of flexible manufacturing systems(FMSs), flexible assembly systems(FASs) have been developed to automatic factories further. As in a cellular FMS, a celluar FAS is considered as the most flexible and feasible assembly systems configuration. This paper presents a method for the integrated layout design in cellular FASs. Unlike the traditional paper, this paper deals with the formation of cells and the layout of cells for jobs with operation times on different machines. The procedure in this paper consists of two distinct phases. The first phase presents machine arrangement in a double rows flowline. cell formation not to allow intercellular movements, and integrated layout design in cellular FASs considering the characteristics of FAS, layout, and production factors This phase uses older optimal algorithm. The second phase proposes to balance the system with an objective of reducing the degree of workload deviation in the cells. Simulated annealing method is used to balance the system. This phase also shows the integrated layout design in cellular FASs with the cost less than total cost of the first phase.

• Management Science and Financial Engineering
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• 제10권2호
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• pp.73-87
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• 2004

Automotive and aircraft assembly process rely on fixtures to support and coordinate parts and subassemblies. Fixture layout in multi-station panel assemblies has a direct dimensional effect on final products and thus presents a quality problem. This paper describes a methodology for fixture layout design in multi -station assembly processes. An optimal fixture layout improves the robustness of a fixture system against environmental noises, reduces product variability, and eventually leads to manufacturing cost reduction. One of the difficulties raised by multi-station fixture layout design is the overwhelmingly large number of design alternatives. This makes it difficult to find a global optimality and, if an inefficient algorithm is used, may require prohibitive computing time. In this paper, simulated annealing is adopted and appropriate parameters are selected to find good fixture layouts. A four-station assembly process for a sport utility vehicle (SUV) side frame is used throughout the paper to illustrate the efficiency and effectiveness of this methodology.