비동기 회로의 기술 방법에 관한 연구

정성태 圓光大學校 1995 論文集 Vol.30 No.2

본 논문에서는 기존의 비동기 회로의 기술 방법을 비교 분석하고 통합된 비동기 회로의 합성모델을 제안한다. 비동기 회로의 기술 방법으로는 신호 전이 그래프와 비동기 유한 상태기가 있다. 기존의 합성 방법에서는 두 가지 기술 방법 중에서 한 가지 기술 방법만을 지원하는데, 본 논문의 비교 결과에 의하면 두 가지 기술 방법은 나름대로의 장단점을 가지고 있어서 두 가지 기술 방법을 모두 지원하는 합성방법이 설계의 효율성을 증대시킬 수 있을 것이다. 본 논문에서는 통합된 합성 모델로서 비동기 유한 상태기를 신호 전이 그래프로 변환하여 합성하는 방법을 제안한다. This paper compares the specification methods for asynchronous circuits and suggests an integrated synthesis environment for asynchronous circuits. The specification methods for asynchronous circuits can be classified into two categories: signal transition graphs and asynchronous finite state machines. According to the comparison result of this paper, the two specification methods have their own merits. Therefore an integrated synthesis environment is needed which can support two specification methods. This paper suggest an integrated synthesis environment which transforms asynchronous finite state machines into signal transition graphs and then synthesizes asynchronous circuits from the signal transition graphs.

고속의 Math. Package 전용 컴퓨터 개발을 위한 개념 개설 연구 ( A Study on the Conceptual Design of a High Speed Math. Package Oriented Computer )

정성태,전주식,김명주 한국통신학회 1989 한국통신학회 학술대회논문집 Vol.1 No.2

비동기 유한 상태기로부터 비동기 회로의 합성에 관한 연구

정성태 圓光大學校 1996 論文集 Vol.31 No.2

본 논문에서는 비동기 유한 상태기로부터 비동기 회로를 합성하는 방법을 제안한다. 기존의 합성 방법에서는 비동기 유한 상태기를 상태 그래프로 변환한 다음에 상태 그래프로부터 회로를 합성하였는데, 상태 그래프는 데이터 복잡도가 지수 승으로 증가하여 합성에 많은 시간이 소요되는 문제점을 가지고 있다. 본 논문에서는 상태 그래프를 이용하지 않고, 다항식 데이터 복잡도를 갖는 신호 전이 그래프를 이용하여 회로를 합성하는 방법을 제안하였다. 본 논문에서 제안한 합성 방법은 데이터 복잡도가 낮은 신호 전이 그래프를 이용함으로써 탐색 영역을 확장할 수 있고, 결과적으로 기존의 합성 방법보다 더 효율적인 회로를 구할 수 있다. In this paper, we present a synthesis method for asynchronous circuits from asynchronous finite state machines. Existing works synthesizes asynchronous circuits by transforming asynchronous state machines into state graphs and then analyzing state graphs. In contrast, our method transforms asynchronous finite state machines into signal transition graphs. And it then synthesizes asynchronous circuit directly from the signal transition graph representation by analyzing the relations among the signal transitions in the representation. It turns out that our method yields more efficient circuits than the existing works. Also, the synthesis time is faster than that of the existing works.

A Study on the Effect of Packaging Design Considering SCM Aspects on Logistics Efficiency (Focusing on the case of domestic A company)

정성태 한국포장학회 2020 한국포장학회지 Vol.26 No.1

This study conducted a case study and a questionnaire analysis in parallel. In the case study, a study was conducted on domestic manufacturer A by analyzing pallet loading efficiency of RRP(Retail Ready Packaging) products and pallet loading efficiency of MWC(Membership Wholesale Club) delivered products. As a result of the pallet loading efficiency simulation of 50 RRP products of Manufacturer A, it was 80.0% based on the T-11 type pallet and 84.3% based on the T-12 type pallet. It was found It refers that the route of producing the product from the manufacturer A and delivering it to the MWC A in the form of RRP resulted in the decrease of the pallet loading efficiency through the change of the loading pattern and the adjustment of the number of loads. As a result of analyzing the questionnaire about whether the overall efficiency of the supply chain will be improved if the operation of the packaging system considering the SCM(Supply Chain Management) aspect is χ2 = 178.500, there was a statistically significant difference at the significance level of 0.000. Manufacturers and logistics companies answered “yes” the most, but distributors answered “is average” the most, confirming that the packaging can be constructed with the highest operational efficiency. Therefore, as a result of confirming the impact of packaging design considering the SCM aspect on logistics efficiency, it indicates the importance of closer collaboration between manufacturers and distributors.

시간 제한 조건을 가진 자유 선택 신호 전이 그래프로부터 비동기 회로의 합성

정성태,정석태,Jeong, Seong-Tae,Jeong, Seok-Tae 한국정보처리학회 2002 정보처리학회논문지 A Vol.9 No.1

This paper presents a method which synthesizes asynchronous circuits from free-choice Signal Transition Graphs (STGs) with timing constraints. The proposed method synthesizes asynchronous circuits by analyzing: the relations between signal transitions directly from the STGs without generating state graphs. The synthesis procedure decomposes a free-choice STG into deterministic STGs which do not have choice behavior. Then, a timing analysis extracts the timed concurrency and tamed causality relations between any two signal transitions for each deterministic STG. The synthesis procedure synthesizes circuits for each deterministic STG and synthesizes the final circuit by merging the circuits for each deterministic STG. The experimental results show that our method achieves significant reductions in synthesis time for the circuits which have a large state space, and generates circuits that have nearly the same area as compared to previous methods. 본 논문에서는 시간 제한 조건을 가진 자유 선택 신호 전이 그래프로부터 비동기 회로를 합성하는 방법을 기술한다. 이 방법에서는 상태 그래프를 생성하지 않고 신호 전이 그래프로부터 직접 신호 전이들간의 관계를 구하여 비동기 회로를 합성한다. 본 논문의 합성 방법에서는 자유 선택 신호 전이 그래프를 선택 행위가 없는 결정성 신호 전이 그래프에 대하여 타이밍 분석을 수행하여 임의의 두 신호 전이 사이의 시간 제약 병렬 관계와 시간 제약 인과 관계를 구한다. 다음에는 이 관계들을 이용하여 각 결정성 신호 전이 그래프에 대한 합성을 수행하고 그 결과를 합병함으로써 전체 회로를 합성한다. 실험 결과에 의하면 본 논문에서 제안한 합성 방법은 상태 공간이 큰 회로에 대하여 현저하게 합성시간을 단축시킬 수 있을 뿐 만 아니라 기존의 상태 그래프 기반 합성 방법과 비교하여 거의 같은 면적의 회로를 합성한다.

항산화제 섭취가 탈진적 운동 시 장딴지근의 GPx 및 GR의 활성에 미치는 영향

정성태,김연수,이왕록,박익렬,강현주 서울대학교 체육연구소 2001 서울大學校 體育硏究所論集 Vol.22 No.1

The purpose of this present study was to investigate the effect of maximal exercise and a long-term antioxidants supplementation on antioxidant enzyme(GPx and GR) activity of gastrocnemius muscle in rats. Twenty four male Sprague-Dawley rats(4 weeks old) were used as subjects. The subjects were divided into 4 groups such as, CON(n=6 in control group), NAE(n=6 in non antioxidants exercise group), AC(n=6 in antioxidants control group) or AE(n=6 in antioxidants exercise group). Non-antioxidants group(CON & NAE) fed general food(Samyang, Inc., Korea) for 16 weeks. Antioxidants group(AC & AE) fed the general food and the mixed antioxidants which were consist of vitamin E(200 lu/kg/day), vitamin C(50 mg/rat/day), vitamin B6(250 ug/kg/day), β carotene(300 mg/kg/day) and selenomethionine(0.1 mg/mg/day), The weight of each subject group was weighed 2-3 times per week. After the diet experiment for 16 weeks, exercise groups(NAE & AE) completed acute treadmill running(speed increased gradually to 25 m/min, 15% uphill grade, ∼50±10 min) until exhaustion. Immediately after exhaustive treadmill exercise, all the subjects were sacrificed for the isolation of gastrocnemius. Then, GPx(Glutathione Peroxidase) and GR(Glutathione Reductase) of the gastrocnemlus muscle were assayed. The protein concentration in the muscle and heart was determined by the Lowry method. After finishing the analysis of antioxidant activity, statistical analysis was carried out by two-way ANOVA and independant t-test. The results of this study can be summarized as follows: Maximal exercise increased the GPx and GR activity of gastrocnemius muscle, Further, a long-term antioxidants supplementation more significantly increased the GPx and GR activity of gastrocnemius muscle than those of non-antioxidants group. In conclusion, the present results clearly show that the exhaustive maximal exercise gave rise to increase oxidative stress which led to oxidative damage so that the antioxidant enzyme activity of gastrocnemius muscle were increased. Further, it has been found that the long-term antioxidants supplementation could decrease oxidative stress in the tissues so that the antioxidant enzyme activity of skeletal muscles was more increased.

한국과 일본의 역사도시 경관관리법규의 비교 -경주시와 나라시의 사례로-

정성태,조세환,오휘영 한국조경학회 2000 韓國造景學會誌 Vol.28 No.3

The purpose of paper is to investigate the characteristics of regulations on landscape management of historic city of Kyongju in Korea, compared with those of Nara in japan to answer the research question that what is the regulative characteristics of landscape management of historic city in Korea. We have analyzed the three laws of the two country - Urban Planning Law, Cultural Assets Protection law, and Building Law. This research has been done in terms of regulative systems of the two country and articles, ordinances, and bylaws on landscape managements of historic city Major components of urban historic landscape management are goals and devices of preservation, preserving actor, authorized actor permitting major planning change, regulatory power on landscape development, and backgrounds of enacting regulations. From this research, we have fond the fact that 1) Kyongju City has general and implicit objectives of landscape management based on conservation of natural environment while Nara City has concrete objectives of lansdscape management, 2) Kyongju City has no regulations on landscape planning while Nara City has systematic planning measures such as designation of landscape management district, planning for preservation of historic landscape, and planning for establishing urban landscape, 3) In an application of landscape management district, Kyongju City designate the district based on the general principle of urban planning district while nara City designate it in a more detailed manner such as district of preservation of historic landscape, district of landscape establishment, and district of building agreement. 4) Kyongju has no legal actor in implementation and management of historic landscape plan while Nara City has administrative organization and procedures, including citizen participation, public hearing, and voluntary participation, and 5) Kyongju City does not operate the consultation committee on landscape management just like Nara City operating. This research results will provide us the remedial insights for landscape preservation of such Korean historic city as Kongju, Puyo, and Chunju. Since our research is focused on the limited area of preserving landscape in historic cities in korea and Japan we need to study sociocultural issues on preserving urban historic landscape more in depth in the future.

변화하는 수요율을 고려한 다단계 재고모형의 개선 알고리즘

정성태,이상진 육군사관학교 화랑대연구소 2014 한국군사학논집 Vol.70 No.2

The METRIC-based inventory model calculates an optimal level for spare parts stock under average demand rate conditions. However, its application is restricted when the demand rate is altered. For reflecting the dynamic conditions of demand rates, a time-dependent demand rate should be considered. This study is based upon the logic of the ASM(Aircraft Sustainability Model), which can reflect changing demand rate. We improve the accuracy of the model concerning the resupply pipeline by adopting the principle of conditional probability of binomial distribution. Furthermore, this study proposes an improved algorithm for the allocation of spare parts. The proposed algorithm overcomes the drawbacks of the Greedy Algorithm, which sometimes offers suboptimal solutions. The proposed algorithm provides an optimal solution while reducing calculation time significantly. The numerical example demonstrates the degree to which the accuracy of model is improved.

한국의 대외투자 수익성 분석 및 시사점

정성태 성균관대학교 경영연구소 2015 자산운용연구 Vol.3 No.2

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A Study on the Operation Method of Packaging System to Enhance Logistics Efficiency

정성태 한국포장학회 2018 한국포장학회지 Vol.24 No.2

This study sought efficiency of collaboration between manufacturers and distributors by finding a way to improve logistics efficiency in order to save distribution cost and standardize packaging together with profit generation by way of simple-display packaging in discount stores. For the study purpose, the impact of products with RRP (Retail Ready Packaging) by each discount store on the collaboration achievement such as loading efficiency was observed. From this observation, an alternative packaging system that can improve logistics efficiency between manufacturers and distributors was sought and the role of distributors in distribution standardization was explored. The purpose of this study also includes suggesting some implications on future basic direction of environment-friendly management. If this study would induce distributors to have more interest in distribution standardization and if logistics efficiency would be enhanced by the operation of packaging system considered of compatibility with pallets, this study would have academic significance and create practical values.