• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 합동 추계학술대회 논문집 정보 및 제어부문
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• pp.206-209
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• 2002

This paper proposes a fractal dimension method for measurement of degree of similarity between prototype pattern and input pattern at ART1 (Adaptive Resonance Theory 1) neural network. In order to confirm the validity of proposed method, comparison of the performance has made between the conventional method and the proposed method through simulation. The results show that the proposed method has considerably improved the performance.

• 한국항공우주학회지
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• 제34권1호
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• pp.1-7
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• 2006

포물형안정방정식을 이용한 2차원 벽면제트의 선형안정성해석을 수행하였다. 벽면제트유동은 노즐의 출구근방을 제외하고 경계층근사가 매우 잘 성립하며, 국소상사성의 도입으로 기본유동의 유동방향속도성분은 출구에서의 레이놀즈수에 무관하게 된다. PSE를 사용해 얻은 벽면제트의 안정성특성은 이전의 실험결과들과 좋은 일치를 보임을 알 수 있었다.

• 한국산업정보학회논문지
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• 제16권4호
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• pp.119-125
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• 2011

The part family (PF) formation in a cellular manufacturing has been a key issue for the successful implementation of Group Technology (GT). Basically, a part has two different attributes; i.e., design and manufacturing. The respective similarity in both attributes is often conflicting each other. However, the two attributes should be taken into account appropriately in order for the PF to maximize the benefits of the GT implementation. This paper proposes a clustering algorithm which considers the two attributes simultaneously based on pareto optimal theory. The similarity in each attribute can be represented as two individual objective functions. Then, the resulting two objective functions are properly combined into a pareto fitness function which assigns a single fitness value to each solution based on the two objective functions. A GA is used to find the pareto optimal set of solutions based on the fitness function. A set of hypothetical parts are grouped using the proposed system. The results show that the proposed system is very promising in clustering with multiple objectives.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2004년도 유체기계 연구개발 발표회 논문집
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• pp.583-589
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• 2004

One of noticeable features in the cross flow fan is that a working fluid passes through impeller blade twice without distinction between the inlet and exit angles. Also, it does produce higher circumferential velocity than other types of blade at the same flow rate in accordance with the application of the forward curved shape. However, a design theory for the cross-flow fan has not yet been formed owing to an eccentric vortex, which is the remarkable characteristics, occurred in a cross-flow fan. Furthermore, the eccentric vortex, which is difficult to control of the size and position, is the important cause of performance decrease. In this study, experiments are carried out to estimate the similarity of the cross-flow fan with various scales and rotational velocity changes. Pressure coefficients to flow coefficients with various scales of the cross-flow fan are plotted to research the application of the general similarity law of the turbomachinery in the cross-flow fan with Archimedes spital, which is the important factor haying an effect on it.

• Journal of Information Science Theory and Practice
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• 제7권3호
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• pp.31-39
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• 2019

Nowadays, recommender systems suggest lists of items to users considering not only accuracy but also diversity and novelty. However, suggesting the most diverse list of items to all users is not always acceptable, since different users prefer and/or tolerate different degree of diversity. Hence suggesting a personalized list with a diversity degree considering each user preference would improve the efficiency of recommender systems. The main contribution and novelty of this study is to tune the diversity degree of the recommendation list based on the users' variety-seeking feature, which ultimately leads to users' satisfaction. The proposed approach considers the similarity of users' desire diversity as a new parameter in addition to the usual similarity of users in the state-of-the-art collaborative filtering algorithm. Experimental results show that the proposed approach improves the personal diversity criterion comparing to the closest method in the literature, without decreasing accuracy.

• 산업경영시스템학회지
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• 제15권25호
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• pp.1-10
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• 1992

This paper identified the fact that Work-in-process Inventory has been decreased with the application of the Group Technology theorem and Group Analysis theorem. which are developed for the purpose of decreasing wastes that are common in multi-items-small-quantity production system. and increasing productivity. The analyzed results In this paper are as follows: Similarity Coefficient Algorithm have an advantage that It can be used in a production system which has a lot of machinery and components. On the other hand. an arbitrary threshold value should he defined and many groupings are being performed independently.

• 한국실내디자인학회논문집
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• 제27권3호
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• pp.41-48
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• 2018

This thesis is a paper comparing Adolf Loos and Antoni Gaudí's 'theory of ornament', based on their text. Adolf Loos and Antoni Gaudí are architects who had worked from late 19c, just before advent of Modernism architecture, to early 20c. When 'ornament' had started to be excluded from architecture according to development of industrialization and capitalism, Loos and Gaudí have both written about 'ornament.' Generally, Loos is known to have possessed rational mind and designed modern building with no ornament, and Gaudí is known to have possessed romantic mind and used splendid ornaments. For those reasons, it was assumed that two architects would have contrast opinions regarding ornaments. However, analysis of two architects' major text reveals that their theories of ornament are fundamentally analogous. Loos and Gaudí both argue dissolution of past normative 'ornament' and claims that rational 'ornament' that fits modern time is possible. Interestingly, intentionally adopted ornaments exist considerably in architecture of Loos. On the other hand, in Gaudí's architecture, there are many points where Gaudí had restrained ornaments. This thesis organizes similarity and differences of two architects' 'theory of ornament' through their texts and works. Moreover, this thesis suggests that then today's architecture aims to restart a debate on 'ornament', it is worth reviewing texts of Loos and Gaudí.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권4호
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• pp.1820-1840
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• 2017

Aiming at the phenomenon of false information issued by service providers in cloud computing environment, a method for service evaluation based on fuzzy theory is put forward in this paper. According to the quality of services provided by cloud service providers and their behavior during interactions, a trust relationship between cloud service providers and cloud service consumers is established, which can be quantified by using fuzzy theory. The quality of services is evaluated by drawing on the trust relationship. In our method, the recommendation credibility of a cloud service consumer is determined through behavior similarity with evaluators and a praise factor. The introduction of the praise factor better suits the phenomenon of a high-quality service getting more repeat customers. The negative impact of dishonest customers is reduced, and the accuracy of trust and cloud service quality evaluation is improved by introducing a confidence factor that can be dynamically adjusted. The experimental results show that our method can effectively and accurately evaluate the trust value and service quality of providers, while weakening the influence of dishonest consumers, and quickly detect dishonest service providers. This is beneficial for consumers trying to find high quality service providers for similar services.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2005년도 추계 종합학술대회 논문집
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• pp.29-35
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• 2005

이제 일상적인 대중문화로서 자리잡은 컴퓨터게임이 주체에 미치는 영향을 정신분석학적 영화이론을 원용하여 고찰한다. 메츠에 의해 정립된 정신분석학적 영화이론은 영화 및 TV에 적용이 되며 대중문화가 인간주체, 사회에 미치는 영향에 대한 기본적인 이론틀을 제공해주고 있다. 이를 게임에도 적용함으로써 향후 게임 비평, 게임문화 연구의 기반을 닦을 수 있을 것으로 기대한다. 이를 위해 먼저, 정신분석학적 기본논의를 점검하는데 주로 프로이드와 라캉의 논의를 살펴본다. 다음으로 메츠와 보드리에 의해 정립된 정신분석학적 영화이론을 살펴보고, 이것이 TV에 적용된 바를 또한 알아본다. 영화와 TV에 대한 이러한 이론적 접근을 컴퓨터게임에도 적용하여 고찰해 본다. 주된 접근틀은 인위적 퇴행, 일차적 동일시, 진술의 흔적에 대한 은폐, 세 가지이다. 그 결과 컴퓨터게임의 정신분석학적 영향력은 영화와 유사하게 인간 주체에게 깊은 영향을 끼치는 것으로 보인다.

• Bulletin of the Korean Chemical Society
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• 제30권8호
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• pp.1783-1792
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• 2009

Although overlapping resonances have been studied extensively in conventional resonance theories, there have not been many studies on them in multichannel quantum defect theories (MQDT). In MQDT, overlapping resonances occur between the channels instead of states, which pose far greater difficulty. Their systematic treatment was obtained for cases involving degenerate closed channels by applying our previous theory, which decouples background scattering from the resonance scattering in the MQDT formulation. The use of mathematical theory on con-diagonalization and con-similarity was essential for handling the non-Hermitian symmetric complex matrix. Overlapping resonances in rare gas spectra of Ar, Kr and Xe were analyzed using this theory and the results were compared with the ones of the previous alternative parameterizations of MQDT which make the open-open part $K^{oo}$ and closed-closed part $K^{cc}$ of reactance submatrices zero. The comparison revealed that separation of background and resonance scatterings achieved in our formulation in a systematic way was not achieved in the representation of $K^{oo}\;=\;0\;and\;K^{cc}$ = 0 when overlapping resonances are present.