• 제목/요약/키워드: computer conferencing

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IP기반 차세대 모바일 네트워크에서 사용자 이동패턴에 기반한 QoS 보장기법 (A Novel QoS Provisoning Scheme Based on User Mobility Patterns in IP-based Next-Generation Mobile Networks)

  • 양승보;정종필
    • 전자공학회논문지
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    • 제50권5호
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    • pp.25-38
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    • 2013
  • 미래의 무선 시스템은 사용자가 이동하며 생활하는 것을 지원해야 한다. 이동성은 매우 다른 특성을 가진 여러 개의 중첩 네트워크의 사용을 통해 제공 될 것이다. 이러한 네트워크는 오늘날의 인기 있는 데스크탑 서비스인 웹 브라우징, 쌍방향 멀티미디어 및 모바일 화상회의 등의 원활한 제공을 지원해야 한다. 따라서 이러한 모바일 시스템 설계의 주요 과제 중 하나는 서비스 품질(QoS) 보장이 될 것이며 이것은 애플리케이션이 다양한 네트워킹 인프라 아래에서 요구하는 것에 따라 보장해야 한다. 우리는 응용 프로그램에 QoS 보장을 제공하는 자원의 예약 및 적응 기법을 사용할 필요가 있다. 그러나 전체 서비스 예약 및 사전 구성은 지나치게 많아서 결과가 매우 비효율적이고 신뢰할 수도 없는 방식이다. 이것을 극복하기 위해 사용자의 이동성 패턴을 이용할 수 있다. 사용자의 움직임을 미리 알고 있을 경우, 예약 및 구성 절차는 사용자가 방문할 가능성이 있는 네트워크의 영역으로 제한할 수 있다. 제안한 Proxy-UMP기법은 다른 기법들에 비해 탐색비용의 증가에 민감하지 않으며, SMR(Session Mobility Ratio)증가에 따라 총비용의 증가율이 적은 것을 보여준다.

원격 치매 조기 진단 시스템 설계 (Design of Remote Early Dementia Diagnosis Systems)

  • 최종명;전경숙;김선경;최정민;류동영;윤숙
    • 사물인터넷융복합논문지
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    • 제6권4호
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    • pp.27-32
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    • 2020
  • 인구 고령화에 따라 치매환자가 크게 늘어나고 있으며, 이에 따른 사회 경제적 부담이 커지고 있다. 현재 치매환자를 효과적으로 관리하는 방법은 조기에 치매 초기 환자를 파악하는 것이다. 그러나 의료진이 부족한 농촌과 섬 지역에서는 병원을 방문해서 조기 검사를 받기 어려운 문제가 있다. 이 문제를 해결하는 방법으로 본 논문에서는 원격 치매 조기 검사 시스템을 제안한다. 원격 치매 조기 검사 시스템은 환자가 실시간 화상 통신을 기반으로 한 원격 의료 기술을 활용하여 원격의 치매 전문가에게 검사 및 진료를 받을 수 있는 시스템이다. 치매 원격 조기 검진 시스템은 섬 지역의 보건지소 의료진이 사용하는 로컬 클라이언트 시스템, 영상을 전송 및 저장/관리하는 화상 서버, 원격 치매 전문가가 활용하는 전문가 클라이언트로 구성된다. 로컬 클라이언트는 환자가 보건지소의 의료진과 같이 사용할 수 있도록 함으로써 현 의료법의 원격협진 기준을 만족시킨다. 또한 전문가 클라이언트는 치매 전문가가 사용하며, 환자의 정보를 저장/관리하고, 환자의 이력 정보를 분석하고 향후 치매 진행 정도를 예측할 수 있다.

확장성을 고려한 산업디자인 협력시스템 설계 및 구현 (Design and Implementation of an Industrial-Design Collaborative System to Support Scalability)

  • 양진모;이승룡;전태웅
    • 한국정보과학회논문지:컴퓨팅의 실제 및 레터
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    • 제6권5호
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    • pp.513-527
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    • 2000
  • 본 논문에서는 3D 애니메이션, 컴퓨터 게임, 산업디자인 제작과 같은 애플리케이션을 원격지에서 가상공간을 통해 공동작업을 수행 할 수 있는 협력시스템 프레임워크 설계 및 개발에 대한 경험을 기술한다. 개발된 시스템은 클라이언트/서버 구조를 가지며,플랫폼에 독립적이고, 확장과 이식이 용이한 협력시스템 프레임워크 구축을 목표로 하고 있다. 이러한 목표를 달성하기 위하여 서버는 자바로 구현하였고, 작업의 부하를 효과적으로 분산시키고 확장성과 객체관리를 용이하게 하기 위하여 분산형과 중앙집중형을 혼합한 절출형 구조를 채택하였다. 이를 위하여 서버는 작업 부하와 기능을 고려하여 사용자의 협력 준비단계를 담당하는 사용자 관리서버, 협력 작업 세션을 지원하는 세션 관리자 서버, 사용자 관리서버들간의 연동 방법을 제공하는 정보 서버로 구성하였다. 클라이언트는 사용자의 편의를 위하여 Windows환경에서 Visual C++로 구현하였다. 그리고, 공동 저작 도구로써 단독환경(stand-alone)에서 가장 많이 사용되는 Kinetic사의 상용 3D Studio Max를 객체공유 방법을 제공할 수 있는 plug-in 기술을 사용하여 분산환경에서 작동하도록 확장하였으며, 채팅과 화이트보드 기능도 제공한다.

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온라인 네트워킹 활동이 가상협업 역량 및 업무성과에 미치는 영향 (The Influence of Online Social Networking on Individual Virtual Competence and Task Performance in Organizations)

  • 서아영;신경식
    • Asia pacific journal of information systems
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    • 제22권2호
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    • pp.39-69
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    • 2012
  • With the advent of communication technologies including electronic collaborative tools and conferencing systems provided over the Internet, virtual collaboration is becoming increasingly common in organizations. Virtual collaboration refers to an environment in which the people working together are interdependent in their tasks, share responsibility for outcomes, are geographically dispersed, and rely on mediated rather than face-to face, communication to produce an outcome. Research suggests that new sets of individual skill, knowledge, and ability (SKAs) are required to perform effectively in today's virtualized workplace, which is labeled as individual virtual competence. It is also argued that use of online social networking sites may influence not only individuals' daily lives but also their capability to manage their work-related relationships in organizations, which in turn leads to better performance. The existing research regarding (1) the relationship between virtual competence and task performance and (2) the relationship between online networking and task performance has been conducted based on different theoretical perspectives so that little is known about how online social networking and virtual competence interplay to predict individuals' task performance. To fill this gap, this study raises the following research questions: (1) What is the individual virtual competence required for better adjustment to the virtual collaboration environment? (2) How does online networking via diverse social network service sites influence individuals' task performance in organizations? (3) How do the joint effects of individual virtual competence and online networking influence task performance? To address these research questions, we first draw on the prior literature and derive four dimensions of individual virtual competence that are related with an individual's self-concept, knowledge and ability. Computer self-efficacy is defined as the extent to which an individual beliefs in his or her ability to use computer technology broadly. Remotework self-efficacy is defined as the extent to which an individual beliefs in his or her ability to work and perform joint tasks with others in virtual settings. Virtual media skill is defined as the degree of confidence of individuals to function in their work role without face-to-face interactions. Virtual social skill is an individual's skill level in using technologies to communicate in virtual settings to their full potential. It should be noted that the concept of virtual social skill is different from the self-efficacy and captures an individual's cognition-based ability to build social relationships with others in virtual settings. Next, we discuss how online networking influences both individual virtual competence and task performance based on the social network theory and the social learning theory. We argue that online networking may enhance individuals' capability in expanding their social networks with low costs. We also argue that online networking may enable individuals to learn the necessary skills regarding how they use technological functions, communicate with others, and share information and make social relations using the technical functions provided by electronic media, consequently increasing individual virtual competence. To examine the relationships among online networking, virtual competence, and task performance, we developed research models (the mediation, interaction, and additive models, respectively) by integrating the social network theory and the social learning theory. Using data from 112 employees of a virtualized company, we tested the proposed research models. The results of analysis partly support the mediation model in that online social networking positively influences individuals' computer self-efficacy, virtual social skill, and virtual media skill, which are key predictors of individuals' task performance. Furthermore, the results of the analysis partly support the interaction model in that the level of remotework self-efficacy moderates the relationship between online social networking and task performance. The results paint a picture of people adjusting to virtual collaboration that constrains and enables their task performance. This study contributes to research and practice. First, we suggest a shift of research focus to the individual level when examining virtual phenomena and theorize that online social networking can enhance individual virtual competence in some aspects. Second, we replicate and advance the prior competence literature by linking each component of virtual competence and objective task performance. The results of this study provide useful insights into how human resource responsibilities assess employees' weakness and strength when they organize virtualized groups or projects. Furthermore, it provides managers with insights into the kinds of development or training programs that they can engage in with their employees to advance their ability to undertake virtual work.

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방송대 간호학생의 교육요구 및 만족에 관한 연구 (A Study on Education Need and Satisfaction of the KNOU Nursing Students)

  • 이선옥;김영임;이상미
    • 한국간호교육학회지
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    • 제2권
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    • pp.75-94
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    • 1996
  • This survey study was aimed at identifying the degree of educational need of the KNOU(Korea National Open University) nursing students defined as admission purposes, satisfaction of distance learning education, learning methods, and courses after graduation. Among randomly assigned 1000 students, 320 KNOU nursing students who allowed to participate in the study completed the questionnaires. The data were analyzed using descriptive statistics, chi-square test, and t-test, Results of this study were as follows : 1. The admission purposes of the KNOU nursing students were 'in order to get a bachelor's degree(83.8%)', 'to acquire knowledge for task(61.3%)', or 'to be admitted for the graduate school (53.1%)' etc. Comparing the admission purposes by age, tow items- 'to explore new possibilities for myself' and 'excellent curriculum' showed statistically significant differences. These two items were also found to show significant differences by marital status. 2. For the media maintenance, the results showed that students use their own cassett radios(96.3%), VTR(49.4%), TV only for the study (44.1%), personal computer (3.31%), or joining Hitel (6.3%). 3. Listening rates of the radio lecture were 'over 80%(9.1%)', '50-80%(9.1%)', '20-50%(18.1%)', 'below 20%(30%)' and 'never(33.1%)', And record lecture showed listening rates as follows : 'over80%(17.2%)', '50-80%(15.9%)', '20-50%(24.4%)', 'below 20%(27,2%)' and 'never(14.4%)'. 4. The difficulties with KNOU life were 'listening radio lectures(38.8%)', studying by following teaching schedules (37.8%)', 'isolated self-study(10.3%)', and 'appearance in the attending classes(8.1%)'. 5. As for satisfaction with teaching methods, the data showed that 81.2% of the respondents were satisfied (or very satisfied) with 'attending classes' and 75%, with 'paper lectures'. On the other hand some of respondents were very dissatisfied with 'recorded lecture(12.8%)' and 'radio lecture(10.9%)' 6. The results also showed that the students want to have 'video conferencing lecture(77.2%)', 'cable TV(64.1%)' and 'CD ROM program' to improve learning effects. 7. Concerning learning attitudes, 48.8% of the students reported 'study mainly for examnination', and only 4.1% answered 'study every day with plan'. The learning attitude showed significant differences by marital status and age. The students also evaluated themelves as 'study very hard(5.9%)', 'study hard in general(41.6%)', 'study a little(40.3%)' and 'study little(11.9%)'. 8. The students responded the most effective learning material was the 'textbook (92.2%)'. 9. For the purposes of using the local center, the results showed 'for the attending classes(76.3%)', 'for the use of references(14.7%)', and 'for the study group(66.7%)'. 10. The results revealed that 20.3% of the respondents had ever experienced unregistration or temporary withdrawal, and 53.4% among them did not register more than one time. The most common reason for the unregistration was 'due to family affairs or their job (70.8%)'. 11. 88.1% of the respondents answered 'they will graduate without fail'. 12. Regarding the benefits from the KNOU graduation, respondents indicated 'graduate school admission(38.1%)', 'self-confidence in social life(17.5%)', and understanding social problems (10.9%)'. 13. 64.4% of the students showed that they have intention to enter the graduate school. The item 'changing work place' showed statistically significant differences by marital status and age.

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가상대학 구현에 관한 연구 (A study on the developing and implementation of the Cyber University)

  • 최성;유갑상
    • 기술경영경제학회:학술대회논문집
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    • 기술경영경제학회 1998년도 제13회 하계학술발표회 논문집
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    • pp.116-127
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    • 1998
  • The Necessity of Cyber University. Within the rapidly changing environment of global economics, the environment of higher education in the universities, also, has been, encountering various changes. Popularization on higher education related to 1lifetime education system, putting emphasis on the productivity of education services and the acquisition of competitiveness through the market of open education, the breakdown of the ivory tower and the Multiversitization of universities, importance of obtaining information in the universities, and cooperation between domestic and oversea universities, industry and educational system must be acquired. Therefore, in order to adequately cope wi th these kinds of rapid changes in the education environment, operating Cyber University by utilizing various information technologies and its fixations such as Internet, E-mail, CD-ROMs, Interact ive Video Networks (Video Conferencing, Video on Demand), TV, Cable etc., which has no time or location limitation, is needed. Using informal ion and telecommunication technologies, especially the Internet is expected to Or ing about many changes in the social, economics and educational area. Among the many changes scholars have predicted, the development and fixations of Distant Learning or Cyber University was the most dominant factor. In the case of U. S. A., Cyber University has already been established and in under operation by the Federate Governments of 13 states. Any other universities (around 500 universities has been opened until1 now), with the help of the government and private citizens have been able to partly operate the Cyber University and is planning on enlarging step-by-step in the future. It could be seen not only as U. S. A. trying to elevate its higher education through their leading information technologies, but also could be seen as their objective in putting efforts on subordinating the culture of the education worldwide. UTRA University in U. S. A., for example, is already exporting its class lectures to China, and Indonesia regions. Influenced by the Cyber University current in the U.S., the Universities in Korea is willing .to arrange various forms of Cyber Universities. In line with this, at JUNAM National University, internet based Cyber University, which has set about its work on July of 1997, is in the state of operating about 100 Cyber Universities. Also, in the case of Hanam University, the Distant Learning classes are at its final stage of being established; this is a link in the rapid speed project of setting an example by the Korean Government. In addition, the department of education has selected 5 universities, including Seoul Cyber Design University for experimentation and is in the stage of strategic operation. Over 100 universities in Korea are speeding up its preparation for operating Cyber University. This form of Distant Learning goes beyond the walls of universities and is in the trend of being diffused in business areas or in various training programs of financial organizations and more. Here, in the hope that this material would some what be of help to other Universities which are preparing for Cyber University, I would 1ike to introduce some general concepts of the components forming Cyber University and Open Education System which has been established by JUNAM University. System of Cyber University could be seen as a general solution offered by tile computer technologies for the management on the students, Lectures On Demand, real hour based and satellite classes, media product ion lab for the production of the multimedia Contents, electronic library, the Groupware enabling exchange of information between students and professors. Arranging general concepts of components in the aspect of Cyber University and Open Education, it would be expressed in the form of the establishment of Cyber University and the service of Open Education as can be seen in the diagram below.

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