• 산업경영시스템학회지
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• 제34권4호
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• pp.120-128
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• 2011

Recent development of communication technology and evolution of telecommunications services, various needs of users are giving Telecom operators difficulties in discovering new services and its promotion strategies. In addition, at the launching of new services, if carriers does not consider complementary and substitution relationships with competing services or self-encroachment problem with the existing service profitability is reduced or lost in the current market. In this study, by analyzing usage pattern of telecommunications services respect to changes in supply and demand environment, the complementarity/substitutability analysis and systematic analytical framework is proposed. This study proposes approaches to establish mobile operators' business strategies and to identify new services demand.

• 대한산업공학회지
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• 제21권4호
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• pp.463-477
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• 1995

This paper presents a decision model that will estimate the expected number of failed units in a repair facility in accordance with the varying demand, and determine the required number of personnel for repairing components. The demand is related to the failure process which follows a reliability growth phenomenon in service. The information in this paper is useful for selecting appropriate scheduling rules and spares stocking policies. SIMAN and FORTRAN were used for computing the time dependent performance measures in the repair facility. The numerical integration method that is presented in this paper will provide accurate performance measures with any dynamic pattern of demand, service rates, and any number of servers.

• Journal of Information Processing Systems
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• 제6권4호
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• pp.575-596
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• 2010

Video-on-Demand services are increasing rapidly nowadays. The load on servers can be very high, even exceeding their capacity. For popular contents, we can use a Periodic Broadcast (PB) strategy using multicast to serve all clients. Recent development of PB uses multiple channels broadcasting for segments of movies in certain patterns, so that users only need to wait for a small segment to start the service. However, users need higher download capacity to download multiple segments at a time. In order to compensate for this, a proxy server can help to reduce download bandwidth requirements by holding some segments for a certain time. This research will focus on more recent PB schemes that couldn't be covered by previous Proxy-Assisted Periodic Broadcast strategies.

• 가정과삶의질연구
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• 제23권4호
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• pp.1-15
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• 2005

Korean society is experiencing rapid changes which are certain to shape the lives of the older people and their families. So, the purpose of this study was to improve the quality of the elderly welfare service in Korea. Even though the interest about the elderly welfare in Korea is rapidly on the increase, the reality of Korean Society still leaves much to be desired, quantitatively as well as qualitatively. Pay attent to this point, now going to grasp the situation of not the handicapped elder people but the general elder people actual life condition and demand for welfare. So this study focused on the demand of not out-of home service but in-home care service. It was based on the data from by Korea National Statistical Office, having observed 6,139 elderly people. The results were as follows. They hope to get the elderly welfare services about health examination service, nursing survice, supporting service for household. That was, the most of them wanted in-home care service than out-of home care service. To ensure effective care to the elderly, it needed development and settlement of welfare service in face of their daily living. And, even though they recognized that they should cover the elderly life expenses themselves, the rate was hit that indicated their adult children as a parents supporter. This means that we should consider not only to the elder people but also to the family which contained the old people as the elderly welfare service. As a remedy, we can find the cooperation between elder welfare service at the social welfare organization and counsel, education at the family strengthen center. To improve the quality of the elderly welfare service in Korea, the elderly welfare service should focus not only on the physical and spiritual health maintenance but also active understanding living environment and growing ability to arbitrate between individual and living.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 1999년도 추계종합학술대회 논문집
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• pp.1041-1044
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• 1999

This paper propose a solution to resolve data overflow or leakage when a subscriber receive data to service provider. The set-top box can communicate with a service provider and can inform the service provider its data overflow or leakage. When service provider received this control signal, it changes data transmit rate and transmits data with changed rate. The buffer of set-top box is important because incoming data from a service provider are stored by it.

• 대한가정학회지
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• 제31권3호
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• pp.89-100
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• 1993

Recently, comprehensive financial service system based on individual, households' economic security and financial independence has emerged as a professional service system in America, while it has not been studied in our country. In order to develop conceptual model of Financial Service System, this paper reviewed ; 1) the concept of financial problem divided into tow dimension, such as financial resource and financial demand, 2) theories of financial service system, further this work also included the identification of relations between financial problem and financial service system.

• 한국IT서비스학회지
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• 제11권2호
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• pp.339-353
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• 2012

Mobile communication technology is advancing forward to deliver more connected devices and richer content and applications. The number of subscriptions continues to grow along with an explosive increase in the mobile data traffic demand. Thereby, it creates a significant network capacity shortage concerns for mobile network operators. In order to address this problem, it is essential to increase the network capacity at a low additional cost. The device-to-device (D2D) communication based proximity service is believed to have a promising future mobile communication technology that is capable to create new mobile service opportunities and offload traffic to the eNB. In addition, it is also required to develop new mobile communication services and its business models not only to accommodate the increasing mobile traffic demand but also to foster profitability of mobile business service providers such as the network providers, contents providers and platform providers. In this article, we first analyze current mobile business eco-system in the context of CPNT based value chain. Then, propose service development framework and business model creation methodologies for the device-to-device communication based services in the beyond LTE/LTE-Advanced systems.

• 한국도서관정보학회지
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• 제46권4호
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• pp.109-137
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• 2015

공공도서관이 지역사회에 대한 정보를 수집하고 제공해야 하는 것은 지역사회 기반시설로서 매우 중요한 업무 중의 하나이다. 따라서 이 연구에서는 공공도서관의 지역정보서비스 활성화를 위한 방안을 제시하고자 공공도서관 및 이용자 대상 공공도서관 지역정보서비스에 대한 이용자 인식 및 요구조사를 실시하였다. 이를 토대로 하여 공공도서관의 지역정보서비스 활성화 방안으로 지역정보 이용을 위한 접근점 다양화, 이용자 요구를 반영한 지역정보 콘텐츠 개발, 공공도서관 중심의 지역정보서비스 협의체 구성, 인식 개선 및 이용 활성화를 통한 지역정보서비스 홍보를 제언하였다.

• 한국생활과학회지
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• 제18권2호
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• pp.407-418
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• 2009

In our modern society along with high speed economic growth and improvement of living conditions and through concentration of people in cities cars became essential necessities for people living in modern society. Due to social and economic conditions and for the need of recycling of materials and as a countermeasure for waste of materials importance of car service is stressed. In this connection need for improvement of working clothes which are suitable for safety and working efficiency in a difficult working environment is essential. However most of working clothes now being sold in the market are produced without consideration of ergonomic aspects of wearers of working clothes. For this reason there is need for basic research on development of working clothes which improve safety and comfort for working of car service workers. Accordingly in this study this author carried out research on fitness, level of satisfaction and dissatisfaction, suitability for movement and level of demand for improvement in working clothes with focus on workers at car service firms and direction for its improvement was explored. This study is intended to provide basic data for development of functional pattern of working clothes for car service workers in future.

• Journal of Information Science Theory and Practice
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• 제10권spc호
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• pp.1-11
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• 2022

As data-based research activities and outcomes increase and ontact or non-face-to-face activities become common, the demand for easy utilization of resources, tools, functions, and easily accessible information required for research in the R&D sector has increased accordingly. With the rapid increase in the demand for collaborative research based on online platforms, research support institutions strive to provide venues for research activities that merge various information and functions. ScienceON, an integrated science & technology (S&T) knowledge infrastructure service developed and operated by the Korea Institute of S&T Information (KISTI), supports open collaboration by connecting and merging all the information, functions, and infrastructure required for research activities. This paper describes the online research activity support tool provided by ScienceON and the remarkable results achieved through this activity. Specifically, the excellent creation of the following flow of meta-material research activities in the ontact space is elucidated. First, the papers required for a meta-material analysis are retrieved, virtual simulation is conducted with the experimental data extracted from the papers, and research data are accumulated. ScienceON's tools for supporting ontact research activity will play a role as an important service in the era of digital transformation and open science.