• 디지털산업정보학회논문지
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• 제6권3호
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• pp.19-29
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• 2010

A marketing model is changed from a customer acquisition to customer retention and it is being moved to a way that enhances the quality of customer interaction to add value to our customers. Such personalization is emerging from this background. The Web site is accelerate the adoption of a personalization, and in contrast to the rapid growth of data, quantitative analytical experience is required. For the automated analysis of large amounts of data and the results must be passed in real time of personalization has been interested in technical problems. A recommendation algorithm is an algorithm for the implementation of personalization, which predict whether the customer preferences and purchasing using the database with new customers interested or likely to purchase. As recommended number of users increases, the algorithm increases recommendation time is the problem. In this paper, to solve this problem, a recommendation system based on clustering and dimensionality reduction is proposed. First, clusters customers with such an orientation, then shrink the dimensions of the relationship between customers to low dimensional space. Because finding neighbors for recommendations is performed at low dimensional space, the computation time is greatly reduced.

• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2005년도 추계학술대회 발표논문집
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• pp.247-262
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• 2005

The purpose of this study was to compare the school life of Korean high school students between public and proprietary schools, especially focused on their internal experiences and flow. Internal experiences were composed of three dimensions: emotion, cognitive efficiency, and satisfaction. Flow was classified into four conditions: apathy, boredom, anxiety, and flow. The study results are: 1. Korean high school students felt more flow when they were in public school than in proprietary school,. In public school, they felt relatively more bored, and on the other hand, they were relatively more anxious in proprietary school. 2. Korean high school students felt more positive emotions when they were in public school than in proprietary school. 3. Korean high school students were more involved into study when they were in public school than in proprietary school. 4. Korean high school students were more satisfied when they were in public school than in proprietary school.

• 한국문헌정보학회지
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• 제40권1호
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• pp.95-117
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• 2006

이 연구는 국립중앙도서관을 중심으로 전국의 공공도서관들이 소장하고 있는 자료를 구축해 놓은 국가자료종합목록시스템(KOLIS-NET) DB의 품질을 평가하는데 그 목적이 있다. 국가자료 종합목록 DB의 품질평가는 선행연구에서 제시된 품질평가모델을 참조하여 포괄성, 중복성, 최신성, 정확성, 일관성 그리고 완전성의 6개의 항목에 대해 사례에 의한 발견적 평가를 시도하였다 실행모델에 근거한 평가를 통해 국가자료 종합목록 DB의 품질을 종합적으로 검증하고, 품질을 열악하게 만드는 요인을 진단하였으며 KOLIS-NET 종합목록 DB의 품질수준 제고를 위한 개선방안을 평가에서 나타난 구체적 문제점을 중심으로 제시하였다.

• 한국생활과학회지
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• 제6권1호
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• pp.79-88
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• 1997

The postpurchase process is the phase that consumers evaluate products or services while using them. And then, they may experience satisfaction/dissatisfaction and emotions elicited products or services. The satisfaction and emotions may be important concepts in consumer behavior such as brand attitude, purchase intentions and using. The purpose of this study was to examine the effects of emotions elicited clothing products on product satisfaction and using in postpurchase. The subjects in this study were selected 500 females. The data were collected by using questionnaires, and 431 data were analysed. The results were as follows: The emotions in postpurchase process were consisted of three dimensions; unpleasure, pleasure, security/activity. These three emotions had the causal effects on product satisfaction significantly, and the unpleasure influenced stronger than others on satisfaction. In addition, the emotions were related to using and the ownership of clothing products. The emotions of pleasure and the security/activity influenced on the ownership, and the security/activity and unpleasure influenced on using clothing products. Therefore, the results in this study imply that consumption emotions elicited clothing products would be multidimensional, and the emotional factors would be important indicators for explaining the satisfaction. The positive affects were related to using clothes, which is, the consumer would have fulfilled their hedonic desires by wearing clothes. Also, the positive affects would be the basis for marketing strategies of sales promotions in clothing products.

• Computers and Concrete
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• 제9권5호
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• pp.327-340
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• 2012

The search for a design that meets both performance and safety, with minimal cost and lesser environmental impact was always the goal of structural engineers. In general, the design of conventional reinforced concrete structures is an iterative process based on rules of thumb established from the personal experience and intuition of the designer. However, such procedure makes the design process exhaustive and only occasionally leads to the best solution. In such context, this work presents the development and implementation of a mathematical formulation for obtaining optimal sections of reinforced concrete columns subjected to uniaxial flexural compression, based on the verification of strength proposed by the Brazilian standard NBR 6118 (ABNT 2007). To minimize the cost of the reinforced concrete columns, the Simulated Annealing optimization method was used, in which the amount and diameters of the reinforcement bars and the dimensions of the columns cross sections were considered as discrete variables. The results obtained were compared to those obtained from the conventional design procedure and other optimization methods, in an attempt to verify the influence of resistance class, variations in the magnitudes of bending moment and axial force, and material costs on the optimal design of reinforced concrete columns subjected to uniaxial flexural compression.

• 한국콘텐츠학회논문지
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• 제7권4호
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• pp.83-90
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• 2007

Flow는 심리학 분야로부터 차용되어 컴퓨터와 인터넷 사용 시 사용자의 긍정적 경험을 설명하는 주요 개념으로 이용되고 있다. 컴퓨터 매개환경(CME: Computer-Mediated Environment)에서 flow 경험은 탐구적 행위와 통신, 학습을 촉진시키며 긍정적 감성을 유발한다고 한다. 본 연구에서는 컴퓨터 매개환경과 전통적인 지필(紙筆)(paper-pencil)환경에서의 비교 실험을 통해, 매체환경(media environment) 간 사용자의 flow 경험 차이를 검증하였다. 실험결과, '재미(enjoyment)' 이외의 대부분의 flow 경험 차원(dimension)에서 매체환경 간 차이를 보이지 않았다. 그러나 사용자들이 느끼는 시간감각의 왜곡(distorted sense of time)은 두 매체환경 간에 유의한 차이가 있는 것으로 나타났다.

• Earthquakes and Structures
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• 제8권5호
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• pp.1127-1146
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• 2015

The excitation angle or angle of incidence is the angle in which the horizontal seismic components are applied with respect to the principal structural axes during a time history analysis. In this study, numerical simulations and parametric studies are performed for the investigation of the effect of the angle of seismic incidence on the response of adjacent buildings, which may experience structural pounding during strong earthquakes due to insufficient or no separation distance between them. A specially developed software application has been used that implements a simple and efficient methodology, according to which buildings are modelled in three dimensions and potential impacts are simulated using a novel impact model that takes into account the arbitrary location of impacts and the geometry at the point of impact. Two typical multi-storey buildings and a set of earthquake records have been used in the performed analyses. The results of the conducted parametric studies reveal that it is very important to consider the arbitrary direction of the ground motion with respect to the structural axes of the simulated buildings, especially during pounding, since, in many cases, the detrimental effects of pounding become more pronounced for an excitation angle different from the commonly examined 0 or 90 degrees.

• 정보관리학회지
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• 제23권2호
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• pp.113-127
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• 2006

디지털 환경에서 물리적인 문헌 단위가 아닌 문헌의 논리적 하위 구성 요소의 접근과 활용이 기술적으로 가능해짐에 따라 이용자의 전자문헌 활용을 지원할 수 있는 효과적인 인터페이스의 개발이 요청된다. 이 논문은 문헌의 하위 단위로의 접근을 지원하는 이용자 인터페이스 재발을 염두에 두고, 이용자의 정보이용행태, 전자 문헌 모델, 그리고 새로운 상호작용 메커니즘의 세가지 측면에서의 관련 연구를 조사하고 문헌 조사를 바탕으로 새로운 인터페이스 개발을 위한 기본적 요구 사항을 결론으로 도출한다.

• 대한안전경영과학회지
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• 제12권1호
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• pp.83-96
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• 2010

Learning Organization is a learning based community to make the most important value in the era of Knowledge Economy, Creation. That's why people share, facilitate personal, individual's knowledge & experience systems each other and make good thoughts & ideas in the organization. This study measures the building practices having conducted the F team in Samsung electronics using DLOQ that indicates the activate degree of Learning Organization and the quantitative degrees of Learning Organization through comparing the cross-evaluation between the already measured companies in addition to analyzing the F team's success factors. Learning Organization requires sustainable and continuous activity, not completes by changing many factors with human resources. The study will have the achievement if we measure the successful activity through global companies built a Learning Organization and facilitate the improvement activity sustainably.

• Journal of information and communication convergence engineering
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• 제12권2호
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• pp.116-121
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• 2014

This paper discusses computer-generated heuristics for motion planning. Planning with many degrees of freedom is a challenging task, because the complexity of most planning algorithms grows exponentially with the number of dimensions of the problem. A well-designed heuristic may greatly improve the performance of a planning algorithm in terms of the computation time. However, in recent years, with increasingly challenging high-dimensional planning problems, the design of good heuristics has itself become a complicated task. In this paper, we present an approach to algorithmically develop a heuristic for motion planning, which increases the efficiency of a planner in similar environments. To implement the idea, we generalize modern motion planning algorithms to an extent, where a heuristic is represented as a set of random variables. Distributions of the variables are then analyzed with computer learning methods. The analysis results are then utilized to generate a heuristic. During the experiments, the proposed approach is applied to several planning tasks with different algorithms and is shown to improve performance.