• 제목/요약/키워드: Korean Users

검색결과 11,485건 처리시간 0.042초

청소년 스마트폰 중독자 예측 및 회복 프로그램에 관한 연구 (Studies on the Forecast of Smart Phone Addicted Youths and the Effect of Rehabilitation Programs)

  • 정관용;변상해
    • 한국시스템다이내믹스연구
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    • 제16권3호
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    • pp.77-96
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    • 2015
  • This study aims to forecast of the number of smart phone addicted youths and to evaluate the effect of rehabilitation programs. A system dynamics model is developed to describe the processes of addiction and transits between phases as well as the diffusion of smart phones. The youths are grouped into non users, general users, potential risky users, and high risky users. The model utilizes the population distributions over ages for the next 30 years forecasted by Korean Government. The number of youths decreases for the next decade or so, and the number of youths who owns smart phone will reach maximum at 2017. As for the rehabilitation programs, the model includes the preventive education for general users, counseling for potential risky users, and professional therapy for high risky users. The preventive education restricts the transit from general users to potential risky users. Counseling increases the transit from potential risky users to general users while it decreases the transit to high risky users. Professional therapy improves transit to potential risky users and to general users. Although the model cannot be validated the accuracy owing to the lack of data, it describes these transit within the reasonable ranges and can be used to study the allocation of the limited resources to maximize the outcome.

인지 무선 시스템에서 이차 사용자의 다자 수용 및 연결 유지를 위한 효율적인 알고리즘에 대한 연구 (An Efficient Admission Control Algorithm to Keep Connections of Secondary Users in Cognitive Radio Systems)

  • 하성철;김세헌
    • 한국경영과학회:학술대회논문집
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    • 한국경영과학회 2007년도 추계학술대회 및 정기총회
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    • pp.464-468
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    • 2007
  • In cognitive radio systems, secondary users, unlicensed users, can use primary users' spectrum to increase spectrum efficiency. At that time, the systems must satisfy primary users' QoS. When secondary users use cognitive radio systems, secondary users communication can be terminated, because of satisfying primary users' QoS. However, secondary users' communication terminating is not good for both secondary users and whole systems. So, cognitive radio systems need an efficient algorithm for secondary users of admission control and keeping connections. In this paper, we present an algorithm which consist of two part, admission control and connections control.

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현대건축에서 사용자의 개념 및 역할 변화에 대한 연구 (A Study on Definition and Role of 'USER' in Contemporary Architecture)

  • 이혁찬;최왕돈
    • 한국실내디자인학회논문집
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    • 제18권5호
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    • pp.80-88
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    • 2009
  • The relationship between architects and users has been multifarioiusly changed through architectural history. From the viewpoint of using a building, users who experience and interpret the building are as important as architects who design it. In the past, architects are not interested in the role of users. Modern architects only emphasized the concepts of users based on efficiency, and therefore users had the passive role following the design intentions in the space architects had created. However, since the end of modern movement, diverse definitions of users have been attempted. Especially the aesthetics of reception reilluminates the role of users neglected in modern movement. Therefore the one-way relationship between architects-buildings are changing into the interactive relationship between architects-buildings-users, and it results from the fact that users have the ability to reinterpret and create architectural space as well. Users have more creative and positive role in architectural space making and architects, too, reflect these trend in their architecture.

Radio Resource Sharing Among Users in Hybrid Access Femtocells

  • Becvar, Zdenek;Plachy, Jan
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제8권8호
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    • pp.2590-2606
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    • 2014
  • A problem related to deployment of femtocells is how to manage access of users to radio resources. On one hand, all resources of the femtocell can be reserved for users belonging to a closed subscriber group (CSG), which is a set of users defined by a femtocell subscriber. This approach, known as closed access, however, increases interference to users not included in the CSG as those users do not have a permission to access this femtocell. Contrary, resources can be shared by all users with no priority in an open access mode. In this case, the femtocell subscriber shares radio as well as backhaul resources with all other users. Thus, throughput and quality of service of the subscriber and the CSG users can be deteriorated. To satisfy both the CSG as well as non-CSG users, a hybrid access is seen as a compromise. In this paper, we propose a new approach for sharing radio resources among all users. As in common cases, the CSG users have a priority for usage of a part of resources while rest of the resources is shared by all users proportionally to their requirements. As the simulation results show, the proposed resource sharing scheme significantly improves throughput of the CSG users and their satisfaction with granted bitrates. At the same time, throughput and satisfaction of the non-CSG users is still guaranteed roughly at the same level as if conventional sharing schemes are applied.

Pre-Evaluation for Detecting Abnormal Users in Recommender System

  • Lee, Seok-Jun;Kim, Sun-Ok;Lee, Hee-Choon
    • Journal of the Korean Data and Information Science Society
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    • 제18권3호
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    • pp.619-628
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    • 2007
  • This study is devoted to suggesting the norm of detection abnormal users who are inferior to the other users in the recommender system compared with estimation accuracy. To select the abnormal users, we propose the pre-filtering method by using the preference ratings to the item rated by users. In this study, the experimental result shows the possibility of detecting the abnormal users before the process of preference estimation through the prediction algorithm. And It will be possible to improve the performance of the recommender system by using this detecting norm.

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남성복 구매형태에 따른 정보원 선택, 위험지각, 추구혜택의 차이에 관한 비교 연구 (The Comparative Study on the Differences among Choice of Information Source, Risk Perception and Benefits Sought According to the Purchase Type of the Men's Suits)

  • 김노호;황선진
    • 복식
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    • 제51권7호
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    • pp.123-134
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    • 2001
  • The purpose of this study to compare the purchasing behaviour of men's business suits, among custom suits, system order, and ready-made suits, centering around the choice of information source, risk perception and benefits sought. The survey of this study was collected from 450 adult male in Seoul. The data was analyzed by factor analysis and ANOVA. The result of this study were as follows : 1. Custom suits, system order, and ready-made suits consumers have a significant difference in the choice of information source. The consumer attaching most importance to the impersonal information source is the system order users, custom suits users, and ready-made suits users respectively. However there was no significant difference in the personal source among 3 different purchasing behaviour of men's suits. 2. For the risk perception, 1) the group who perceived the highest in economic risk is the system order users, followed by custom suits users, and ready-made suits users. 2) the group who perceived performance risk as being the highest concern is the ready-made suits consumers, followed by system order user, and custom suits user. 3) the group who perceived the socio-psychological risk as the highest is the ready-made suits consumers, and followed by custom suits user and system order users. 4) there is no difference among the three groups with respect to the fashionability loss risk. 5) the group of the highest perceiving the useful loss risk is the ready-made suits consumers, and the next is system order users, custom suits users. 6) the group of the highest perceiving the time and convenience loss risk is ready-made suits users, and the next is system order users, custom suits users. 3. For the benefit sought, the group of the highest perceiving the aesthetics is custom suits consumers, and the next is system order users, ready-made suits users.

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한국 청소년의 일반담배 및 전자담배 사용과 수면건강과의 관계: 제14차(2018년) 청소년건강행태조사 자료 분석 (Associations between Cigarette and Electronic Cigarette Use and Sleep Health in Korean Adolescents: An Analysis of the 14th (2018) Korea Youth Risk Behavior Surveys)

  • 이보경;이해인
    • 대한간호학회지
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    • 제51권3호
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    • pp.380-389
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    • 2021
  • Purpose: This study aimed to understand the relationship between cigarette and electronic cigarette (e-cigarette) use and sleep health among Korean adolescents. Methods: Using the 14th Korea Youth Risk Behavior Survey, we included 52,928 adolescents who responded to sleep satisfaction and sleep duration. Participants were classified into four groups: non-users, cigarette-only users, e-cigarette-only users, and dual users of both products. To examine the associations between cigarette and e-cigarette use and sleep health, data were analyzed using complex samples cross tabulation and complex samples logistic regression. Results: Of the four groups, dual users reported the lowest level of sleep satisfaction and sleep duration; 57.0% and 86.9% of dual users were not satisfied with their sleep and have insufficient sleep duration, respectively. The proportion of students who were not satisfied with their sleep was higher among cigarette-only users compared to e-cigarette-only users (52.7% vs. 45.8%), but the two groups reported similar rates of insufficient sleep duration (84.2% vs. 84.3%). Compared to non-users, cigarette-only users, e-cigarette-only users, and dual users were more likely to not be satisfied with sleep (odds ratios [ORs] were 1.49, 1.36, and 1.75, respectively) and had significantly higher odds of experiencing insufficient sleep duration (ORs were 1.85, 2.06, and 2.34, respectively). Conclusion: E-cigarette-only use and dual use as well as cigarette-only use were associated with poor sleep health. Therefore, to improve adolescent sleep health, health professionals should provide sleep intervention strategies considering the association between smoking and sleep health.

A Method of Finding Hidden Key Users Based on Transfer Entropy in Microblog Network

  • Yin, Meijuan;Liu, Xiaonan;He, Gongzhen;Chen, Jing;Tang, Ziqi;Zhao, Bo
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제14권8호
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    • pp.3187-3200
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    • 2020
  • Finding key users in microblog has been a research hotspot in recent years. There are two kinds of key users: obvious and hidden ones. Influence of the former is direct while that of the latter is indirect. Most of existing methods evaluate user's direct influence, so key users they can find usually obvious ones, and their ability to identify hidden key users is very low as hidden ones exert influence in a very covert way. Consequently, the algorithm of finding hidden key users based on topic transfer entropy, called TTE, is proposed. TTE algorithm believes that hidden key users are those normal users possessing a high covert influence on obvious ones. Firstly, obvious key users are discovered based on microblog propagation scale. Then, based on microblogs' topic similarity and time correlation, the transfer entropy from ordinary users' blogs to obvious key users is calculated and used to measure the covert influence. Finally, hidden influence degrees of ordinary users are comprehensively evaluated by combining above indicators with the influence of both ordinary users and obvious ones. We conducted experiments on Sina Weibo, and the results showed that TTE algorithm had a good ability to identify hidden key users.

인터넷상거래 이용자/비이용자의 소비자문제 심각성지각 연구 - 대학생소비자를 중심으로 - (A Study on the Perceived Seriousness of the Consumer Problem between E-commerce Users and Non-Users - Focused on University Consumers -)

  • 류미현;이승신
    • 대한가정학회지
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    • 제41권8호
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    • pp.19-31
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    • 2003
  • This study was intended to present the plan for preventing and solving the seriousness of the consumer problem perceived in the e-commerce. For this purpose, 723 questionnaires were distributed to university As a result of analysis, the following findings were obtained: 1) It was found that e-commerce users had higher knowledge of the degree of internet un, the ability to use information on the internet, the disposition of computerization, and e-commerce related consumer than e-commerce non-users. 2) It was found that e-commerce non-users had the higher level of perceived seriousness of the consumer problem than e-commerce users. Especially, it was found that e-commerce non-users had the high level of perceived seriousness of the consumer problem related to the problem of exchange, termination and after-sale nice and the leakage of exchange, termination and after-sale service and the leakage of private information e-commerce user. 3) It was found that university consumers' perceived seriousness of the consumer problem in e-commerce over the internet showed a significant difference in the ability to use information on the internet between e-commerce users and non-users.

유비쿼터스 환경에서 실시간 사용자 성향 학습을 위한 지능형 P2P 모바일 에이전트 시스템 (An Intelligence P2P Mobile Agent System to learn Real-time Users' Tendency in Ubiquitous Environment)

  • 윤효근;김창석;이상용
    • 한국지능시스템학회논문지
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    • 제15권7호
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    • pp.840-845
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    • 2005
  • 사용자 성향을 학습하는 기존의 지능형 에이전트는 사용자의 정보가 일정 수준 이상으로 축적되어 있거나 충분한 훈련 시간을 통하여 사용자의 성향을 학습하였다. 이러한 지능형 에이전트를 유비쿼터스 환경에 적용하였을 때, 사용자는 지능형에이전트가 학습까지의 시간을 기다려아 하며, 필요한 서비스를 적절히 지원받지 못하는 경우가 발생할 수 있다. 본 논문에서는 사용자들이 가지고 있는 자원을 공유함으로써 사용자의 성향을 실시간으로 학습할 수 있는 지능형 P2P 모바일 에이전트 시스템을 제안한다. 제안한 시스템은 평가를 위해 4개의 장소에서 사용자들의 컨텍스트를 공유시키고, 유가한 사용자들을 피어그룹으로 설정하였다. 그리고 이 피어 그룹에서 상관계수가 가장 놀은 사용자의 서비스를 제공한 결과, $80\%$이상의 서비스 만족도를 보였다.