• International Journal of Knowledge Content Development & Technology
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• v.11 no.1
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• pp.85-111
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• 2021

This study aims to analyze users' assessment of electronic libraries in the mobile app market and promote service improvement based on this. To this end, the basic background and purpose of the research, research method, and research scope were first set, and the relevant literature and empirical prior studies were analyzed. Next, users' evaluations of electronic libraries were collected and analyzed from Google Play Store. Based on the results analyzed, measures to improve the quality of electronic libraries were discussed. Based on the results of the study, the following improvement measures are proposed. Need for systemic improvement and stabilization. Provision of applications suitable for multi-device environments. Resumption of services after systematic inspection after updating. Simplification of sign up, log in, and authentication procedures. User support through real-time chat. Introduction of a detailed assessment of reviews. Provision of guidance and user manual for electronic libraries. Improvements to expand user convenience, and Securing differentiation from other similar services.

• Journal of Digital Convergence
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• v.11 no.5
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• pp.105-117
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• 2013

Viewpoint about the quality of software is various. But, from the end-user point of view, user interface of software may be all to express the quality of software. But the detailed evaluation criteria were not established about usability evaluation method based on user interface so far, though user interface of software is the main object of usability quality characteristics. In this paper, we established a system about the method extracting and evaluating some quality characteristics elements measurable form user interface of software by analyzing the relationship between the elements constructing quality characteristics and user interface related to quality evaluation of software. We expect that this result of study will be a fundamental study adapting and evaluating to various types of user interface.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.295-297
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• 2008

Session Initiation Protocol (SIP) has become the call control protocol of choice for Voice over IP (VoIP) networks because of its open and extensible nature. However, the integrity of call signaling between sites is of utmost importance, and SIP is vulnerable to attackers when left unprotected. Currently a hop-by-hop security model is prevalent, wherein intermediaries forward a request towards the destination user agent server (UAS) without a user agent client (UAC) knowing whether or not the intermediary behaved in a trusted manner. This paper presents an integrated security model for SIP-based VoIP network by combining hop-by-hop security and end-to-end security.

• Proceedings of the IEEK Conference
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• 2004.08c
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• pp.576-580
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• 2004

In this paper, we present a design and implementation of a TV-Anytime compliant STB to provide personalized content consumption according to user preferences and various terminal/network conditions. This paper mainly details with a metadata engine which consists of meta data de-multiplexing, metadata decoding, and metadata-based content browsing. For personalized content consumption, the proposed metadata engine provides the following key functionalities: advanced EPG, non-linear segment navigation wirh Tables-of-Content and/or event-based summary, automatic recommendation of user-preferred programs, and etc. The implemented STB employing the metadata engine is successfully tested with a set of service scenarios in an end-to-end broadcasting test-bed.

• Asia pacific journal of information systems
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• v.10 no.3
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• pp.41-59
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• 2000

The role of information systems(IS) is far more important in business operations today. Managers recognize information as a major resource of the organization, and non-expert end users positively participate in information system development processes. This phenomenon is considered user-led information system development(ULD), where users define the information requirements, oversee system testing, manage system development, and lead the overall project. Based on a socio-technical approach, this study examines the impact of ULD on IS success. This paper also investigates the moderating effects of various contextual factors on the relationships between ULD and the success. The questionnaire was developed and the data was collected from the end users who participated in implementing ERP systems. The results showed that ULD positively affects the success. For the moderating variables, IT complexity was found to have a strong effect on the relationship between ULD and the success while business complexity and top management support have partial effects. Surprisingly, resource adequacy was not found to have the effect. This study provides academia and practitioners with a number of implications and guidelines regarding why and when to introduce ULD in their IS development initiatives.

• Journal of the Korea Safety Management & Science
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• v.9 no.3
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• pp.119-125
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• 2007

As competition in manufacturing enterprise is contested, the scope of safely production planning, manufacturing enterprise should ensure, has been reduced. The more upstream of SCM, the more reduction of scope of production planning. As a result, order fluctuation is more sharply contested. Through improving the logistics network, it is best way that the end user's demand information is conveyed to upstream of SCM, but it is difficult in fact. In this paper, it mention the way of robustic adjustment, in the suppliers' point of view, the end user's demand information is dammed up, as they postpone responding the customer's order as a possible. And it will show the result of appling the way, as a case study.

• Journal of information and communication convergence engineering
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• v.14 no.3
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• pp.137-146
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• 2016

In this paper, we introduce a quality of experience (QoE)-provisioning mobility management scheme. The emphasis is on a mobility-aware QoE solution enabling network components to recognize the mobility pattern of an end-user and to prepare a handover in advance. We further focus on an energy-adaptive QoE solution based on the energy profile providing the preferred pattern of energy consumption and an energy preference check engine determining whether the provision of the service that the end-user requested is suitable to QoE or not. Lastly, we concentrate on a network-based intelligent mobility management scheme adopting the calm service and the balance. Consequently, we conclude that the proposed schemes improve the handover latency, QoE metrics, and energy efficiency simultaneously.

• Journal of Applied Reliability
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• v.13 no.4
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• pp.229-239
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• 2013

This paper reports a manner to use a Bayesian approach to derive the optimal replacement policy. In order to produce a system with minimal repair warranty, a replacement model with the extended warranty is considered. Within the warranty period, the failed system is minimally repaired by the manufacturer at no cost to the end-user. The failure time is assumed to follow a Weibull distribution with unknown parameters. The expected cost rate per unit time, from the end-user's viewpoints, is induced by the Bayesian approach, and the optimal replacement policy to minimize the cost rate is proposed. Finally, a numerical example illustrating to derive the optimal replacement policy based on the Bayesian approach is described.

• 전기의세계
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• v.39 no.7
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• pp.52-59
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• 1990

이미 외국에서는 출력소(Sevice Bureau)가 잘 발달되어 있어 소규모의 투자로 인화지나 필름출력을 쉽게 얻을 수 있게 되어 있다. End User와 출력소간의 WAN이 활발히 운용되고 있으며 우리나라에서도 ELEX BBS가 개설됨으로서 Macintosh출력소와 End User간의 화일 전송이 가능하게 되어 또 한 걸음의의 진보를 보게 되었다. 마지막으로 한글화에 대한 문제를 언급하기 위해 DTP의 일반적 구성요소를 다음과 같이 놓고 보자. - Writing and editing - Text Scanning - Image Scanning - Image Processing - Painting and Drawing -Typography - Page Prepress -Color Prepress - Printing - Presentations - Workgroup Publishing 이중에서 System자체의 처리 능력으로 보면 Writing and Editing은 한글 문제가 거의 해결되었다고 볼 수 있고 Image 및 Color의 관계 처리는 실용화 단계에 있으며 Printing도 Postscript가 동양권을 위한 2byte postscript이 발표되어 이미 실용화 해서 쓰고 있다. 2byte용의 Postscript서체는 동양권에서도 우리나라에 가장 많이 서체가 개발되어 있다. 개발되어 있는 서체는 계속 다듬어지고 있으므로 곧 사용자는 질 좋고 다양한 서체를 사용할 수 있을 것이다.

• Broadcasting and Media Magazine
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• v.25 no.2
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• pp.36-43
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• 2020

AI 시스템은 우리 생활 전반에서 다양한 예측을 도와주는 장치로써 그 중요성이 크다. AI 시스템의 활용도는 AI 장치가 얼마나 우리 생활 전반에 다각도로 이용되어야 하는지에 달려있다. 현재 AI 시스템은 높은 정확도를 위해 학습과 추론에 고성능 컴퓨팅 장비를 필요로 한다. 고성능 장치를 우리 생활 저변에서 쉽게 설치하고 사용할 수 없기 때문에, AI 시스템을 우리 생활에 사용하기 위해서 크게 두 가지의 접근법을 사용하고 있다. 첫째, 고성능 네트워크와 고성능 컴퓨팅 서버를 사용하여 end-user 장치의 계산 복잡도를 최소화하는 시스템을 설계할 수 있다. 둘째, AI 시스템의 학습 및 추론 효율성을 높여, 서버와 네트워크 없이도 end-user 장치에서 최선의 성능을 내는 시스템을 설계할 수 있다. 첫번째 접근법은 고성능 네트워크의 발전을 수반하고, 네트워크의 항상성을 전제로 하기 때문에, 실현하는데 많은 시간과 자원이 요구된다. 두번째 접근법은 비용-효율적이긴 하나 첫번째 접근법에 비해 AI 시스템의 성능이 다소 떨어질 수 있다. 이 글에서는 두번째 접근법의 AI 시스템, 특히 시각 인식 시스템을 응용으로 하는 기술들을 살펴보도록 하겠다.