• Journal of KIISE:Computer Systems and Theory
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• v.26 no.10
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• pp.1275-1283
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• 1999

본 논문은 CMOS 디지털 회로에서의 전력 소모의 주원인인 신호의 천이중에서 회로의 동작에 직접적인 영향을 미치지 않는 불필요한 신호의 천이인 글리치를 줄이기 위한 효율적인 알고리즘을 제시한다. 제안된 알고리즘은 회로의 지연 증가 없이 게이트 사이징과 버퍼 삽입에 의해 경로 균등(path balancing)을 이룸으로써 글리치를 감소시킨다. 경로 균등화를 위하여 먼저 게이트 사이징을 통해 글리치의 감소와 동시에, 게이트 크기의 최적화를 통해 회로 전체의 캐패시턴스까지 줄일 수 있으며, 게이트 사이징 만으로 경로 균등화가 이루어지지 않을 경우 버퍼 삽입으로 경로 균등화를 이루게 된다. 버퍼 자체에 의한 전력 소모 증가보다 글리치 감소에 의한 전력 감소가 큰 버퍼를 선택하여 삽입한다. 이때 버퍼 삽입에 의한 전력 감소는 다른 버퍼의 삽입 상태에 따라 크게 달라질 수 있어 ILP (Integer Linear Program)를 이용하여 적은 버퍼 삽입으로 전력 감소를 최대화 할 수 있는 저전력 설계 시스템을 구현하였다. 제안된 알고리즘은 LGSynth91 벤치마크 회로에 대한 테스트 결과 회로의 지연 증가 없이 평균적으로 30.4%의 전력 감소를 얻을 수 있었다.Abstract This paper presents an efficient algorithm for reducing glitches caused by spurious transitions in CMOS logic circuits. The proposed algorithm reduces glitches by achieving path balancing through gate sizing and buffer insertion. The gate sizing technique reduces not only glitches but also effective capacitance in the circuit. In the proposed algorithm, the buffers are inserted between the gates where power reduction achieved by glitch reduction is larger than the additional power consumed by the inserted buffers. To determine the location of buffer insertion, ILP (Integer Linear Program) has been employed in the proposed system. The proposed algorithm has been tested on LGSynth91 benchmark circuits. Experimental results show an average of 30.4% power reduction.

• The KIPS Transactions:PartA
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• v.14A no.3 s.107
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• pp.167-172
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• 2007

VM(Virtual Machine) can be considered as a software processor which interprets the machine code. Also, it is considered as a conceptional computer that consists of logical system configuration. But, the execution speed of VM system is much slower than that of a real processor system. So, it is very important to optimize the code for virtual machine to enhance the execution time. Especially the optimizer for a virtual machine code on embedded devices requires the highly efficient performance to the ordinary optimizer in the respect to the optimized ratio about cost. Fundamentally, functions and basic blocks which influence the execution time of virtual machine is found, and then an optimization for them nay get the high efficiency. In this paper, we designed and implemented the optimizer for the virtual(or abstract) machine code(VMC) using profiling. Firstly, we defined the profiling information which is necessary to the optimization of VMC. The information can be obtained from dynamically executing the machine code. And we implemented VMC optimizer using the profiling information. In our implementation, the VMC is SIL(Standard Intermediate Language) that is an intermediate code of EVM(Embedded Virtual Machine). Also, we tried a benchmark test for the VMC optimizer and obtained reasonable results.

• The KIPS Transactions:PartD
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• v.16D no.2
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• pp.223-236
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• 2009

BPMN is a standard business process description notation developed by OMG. It allows the user to have an abstract view of a process that hides its details with the Collapsed Sub-Process notation. While it is a useful direction of abstraction that can be called the horizontal abstraction, a different kind of abstraction, the vertical abstraction, is necessary when different stakeholders of business would like to have different views of the business process form their own viewpoints of interest. For example, stakeholders may want to see a process from the viewpoint of a particular group of actors or from the viewpoint of a certain set of goals. This paper first extends horizontal abstraction capability of BPMN by introducing the notion of super edge and, moreover, adds the vertical abstraction capability to it by introducing the notions of 'aspect attribute' and 'interest specification' and notations for them.

• The KIPS Transactions:PartB
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• v.13B no.2 s.105
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• pp.155-162
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• 2006

The medical thesaurus, MeSH (Medical Subject Heading), has been used as a controlled vocabulary thesaurus for English medical paper indexing for a long time. In this paper, we propose an automatic cross language keyword assignment method, which assigns English MeSH index terms to the abstract of a Korean medical paper. We compare the performance with the indexing performance of human indexers and the authors. The procedure of index term assignment is that first extracting Korean MeSH terms from text, changing these terms into the corresponding English MeSH terms, and calculating the importance of the terms to find the highest rank terms as the keywords. For the process, an effective method to solve spacing variants problem is proposed. Experiment showed that the method solved the spacing variant problem and reduced the thesaurus space by about 42%. And the experiment also showed that the performance of automatic keyword assignment is much less than that of human indexers but is as good as that of authors.

• Journal of the Korean Institute of Gas
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• v.7 no.2 s.19
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• pp.7-13
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• 2003

Abstract This paper presents new emission mechanism and emission estimation model in volatile organic compounds(VOCs) emission sources. Also classifies applicable emission reduction techniques and presents new economical evaluation method for each techniques. We ultimately developed VEER(VOCs Emission Estimation and Reduction) software, which is backed by above mentioned model, emission source DB, Chemical properties DB, meteorological DB, and emission factor DB. With VEER, users in enterprise, central government and local self-governing body can get reliable emission results easily, and choose suitable emission reduction techniques.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.7
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• pp.1653-1659
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• 2015

Operating Systems is a discipline which handles abstract concepts and techniques. However, most of OS courses have been textbook-oriented theoretical classes. Theoretical classes lead to the decline in the understanding of a lecture and hurt their concentration. Many instructors have tried various ways to help students understand lectures and arouse interests. This paper describes the design and implementation of a web-based educational CPU scheduling simulator which enables learners to set up various situations and simulate scheduling processes using a web browser or a smart-phone. After utilizing the implemented simulator for the class, the survey result for 2014's students shows that it is useful as an educational tool which enhances the understanding of a lecture and develops their problem solving skills.

• Membrane Journal
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• v.13 no.2
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• pp.73-80
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• 2003

Abstract: The surfaces of poly (methylpentene)(PMP) were modified by Af and $NH_3$ plasma treatment, and their effects on permeation characteristics were investigated. The mole ratio of O/C in the surface was increased with Ar plasma treatment and consequently the surface became hydrophilic because of the possible formation of -OH, -COOH and C=O. The surface treated by $NH_3$ plasma also became hydrophilic due to the formation of amine and/or amide groups. The $CO_2$ permeability and its actual selectivity over N_2$ were 182 baller and 6.17 for the optimum condition of Ar-30W-6min, while 144 Baller and 6.13 for that of $NH_3$-30 W-8 min.

• Korean Journal of Materials Research
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• v.3 no.3
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• pp.300-309
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• 1993

Abstract In this work. gasification of graphite cores from nickel-coated graphite composite powders was carried out to munufacture the hollow nickel metal powders which can be used as a raw materials for porous nickel metal strips. Graphite cores were gasified by $H_2O-H_2$ mixture gases at the temperature between $800^{\circ}C$ and $900^{\circ}C$ and nearly all removed from the composite powders within 1 hour. The hollow nickel metal powders prepared from 82.2wt. % Ni-17.8wt. % C composite powders which have the graphite cores of 21${\mu}$m average size were pressed and sintered at $1150^{\circ}C$ for 1 hour in vacuum furnace. The porosities of green and sintered compacts were 45% and 30%. respectively, and pores were distributed very homogeneously in the sintered compact. It was confirmed that pore distribution and porosity in porous materials can be easily controlled by using hollow powders as a raw materials.

• Journal of Physiology & Pathology in Korean Medicine
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• v.17 no.4
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• pp.962-968
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• 2003

The purpose of this research was to investigate inhibitory activity of Sasang medicines on diabetes. Reduce 36 kind of medicines to powder, abstract add 100 times methanol. Examine inhibitory activity on α-amylase and α-glucosidase in vitro. Thirty six oriental herbs were screened for inhibitory activities against carbohydrate digesting enzymes in vitro. Methanol extract of Pleuropterus multiflorus Turez, Ephedra sinica, Moutan cortex Radicis, Magnolia obovata, Alpinia officinarum, Amomi Semen, Rubus coreanus, and Cinnamomi cortex inhibited yeast α-glucosidase activity and extract of Moutan cortex Radicis and Rubus coreanus inhibited porcine α-amylase activity by more 50%. Rubus coreanus showed the strongest inhibition against both α-glucosidase and α-amylase. Therefore, Rubus coreanus was the most effective medicice of 36 kind of medicines.

• Journal of Society of Preventive Korean Medicine
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• v.23 no.3
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• pp.83-107
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• 2019

Objective : We compare the nurturing theories of Between the Nurturing Theory of Dogyogwonseonseo(道敎勸善書) JeungjungGyeongsinrok(增訂敬信錄), Gyeongsinrokeonseok(敬信錄諺釋), Taisanggauempyeondosul(太上感應篇圖說) and Guahwajonsin(過化存神) vs Dongui-Susebowon-Sasang-Chobongwon(東醫壽世保元四象草本卷) and Dongui-Susebowon(東醫壽世保元) of Lee-Jema. And the influences that Dogyogwonseonseo had on Nurturing Theory of Lee-Jema. Method : We sort out the identical or similar vocabularies and abstract the important concepts from all four kinds of Dogyogwonseonseo and two kinds of Lee-Jema's books mentioned above and compare them respectively. The prehistories of vocabularies and concepts needed such as Bok(福, good fortune) and Su (壽, longevity) will be traced. And the synchronic understanding needed such as 'Good deed leads to longevity and good fortune whereas evil deed leads to short life' in late Choseon dynasty will be surveyed by investigating the controversy of the time. Results : The Nurturing Theory of Lee-Jema was influenced by all four kinds of Dogyogwonseonseo mentioned above. We can ascertain the influence from Lee-Jema's Concept of Myeong(命), Nurturing Life through everyday life, 'Good deed leads to longevity and good fortune whereas evil deed leads to short life', deceiving mind(詐心), betraying mind(欺負心) and the jealousy of Man and Woman. Conclusion : The influences Dogyogwonseonseo had on Lee-Jema's nurturing theory were key concept words such as Myeong(命), the ways of thinking like 'Good deed leads to longevity and good fortune whereas evil deed leads to short life' and vocabularies such as deceiving mind(詐心).