• Journal of the Korea Society of Computer and Information
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• v.25 no.12
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• pp.253-259
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• 2020

In this paper, we propose to confirm the perceptions of vocational rehabilitation of the mentally disabled by mental health service providers. The survey was conducted using a questionnaire consisting of vocational ability for the mentally disabled, family support, worker competence, and worker needs, targeting 132 workers at the mental health welfare center and mental rehabilitation facility, which are mental health service institutions in A Metropolitan City. The collected data were analyzed using the technical knowledge, t-test, ANOVA, Scheff? test, Pearson's correlation coefficient, and multiple regression using the SPSS 21.0 program. In the end, the workers' desire for vocational rehabilitation for the mentally disabled of workers in mental health service institutions was higher in mental rehabilitation facilities than in mental health welfare centers, and the competence of workers had a significant effect on the vocational skills and family support of the mentally disabled people. Therefore, it will be possible to ultimately promote vocational rehabilitation for the mentally disabled by strengthening the capacity for vocational rehabilitation for the mentally handicapped of mental health service providers in the future.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.677-681
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• 2006

In this paper, we suggest the GUI Management Tool, named K-Manager, for management and service of science and technology information that stored in distributed retrieval databases. Generally, it must be adapted retrieval database system for web based S&T contents service. But, It is inconvenient contents manager or the system administrator controls information easily, because it does not support the S&T information management process like TOAD, which can use for the relation database, in information retrieval database system. Using K-Manager, content manager can process the S&T content and system manager can manage the databases easily. The proposed tool active controls information effectively which is stored in the distributed retrieval database which guarantee the safety management of the contents stored in database and operate retrieval with efficient performances. Our tool consists of two sub systems, one is content manager, the other is database manager for YESKISTI based on KRISTAL-IRMS.

• Information and Communications Magazine
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• v.19 no.7
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• pp.40-55
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• 2002

The advent of Third Generation (3G) communication systems, with their ability to process real-time multimedia applications and their large bandwidths, will greatly enhance mobile Internet access. Not only does Wideband Code Division Multiple Access (WCDMA) and cdma2000 radio technology offer an advantageous density for voice in terms of spectral efficiency, it also supports higher rates and offers differentiated levels of duality of Service (QoS) for data applications. The early introduction of packet and multimedia technologies will be a key element in realizing a quick and successful return on the operator's investments in Universal Mobile Telecommunications System (UMTS) and cdma2000.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.10
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• pp.2150-2164
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• 1997

Two distinct features required in transport service and protocol to meet new multimedia applications requirements are multicast transmission capability and enhanced QoS facility. In this paper, we presents major functions and facilities of enhanced communications transport service definition supporting these requirements. At first, major fundamental issues, that should be handled to design multi-peer communcation service and protocol, are resoved and applied to design service definition. Secondly, we proposed several new functions for enhanced transport service such as heterogeneous TC establishment, invitation capability, TC-ownership transfer, restriction of transmit concurrency. The detils of proposed enhanced transport service are TC creation, TC invitation, TC join, multicase data transfer, pause of data transfer, resulme of data transfer, report of specific status, TC leave, TC termination, TC-ownership transfer, Token transfer services. The proposed transport service was submitted and accepted as a draft text for committee draft of international standard by the international standradization body such as JTC1/SC6 and ITU-T SG 7.

• Proceedings of the CALSEC Conference
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• 2002.01a
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• pp.135-154
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• 2002

As the use of Information Technology is increasing, various kinds of IT service vendor proliferate. And most executives are trying to expand their field to online world. As the emphasis on Information Technology is inevitable, executives want to evaluate the service level they receive from IT service vendor. But. there's not yet the proper evaluation system for IT service. The evaluation systems like CMM, SPICE are process-focused. They don't give a look on the final product delivered to customer. On the other hand, the one that evaluate the customer satisfaction like ACSI, NCSI are too over-focused that they can't express the specific characteristics on the subjects that are deemed to evaluate. The focus is blurred. To overcome these limitations of existing framework, and to increase the value of evaluation, this study presents the evaluation system of IT service (afterwards, named as 'The new evaluation system') that derives process factors from IT service CMM, and evaluate customer satisfaction of IT service. Finally, the model was applied to the actual case to examine the practicality of the framework.

• Management & Information Systems Review
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• v.3
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• pp.99-131
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• 1999

The purpose of this study is to investigate relational benefits affecting the relationship quality and the existence of differences to which relational benefits are most important to the customers across the type of services that customer buys and customer's relationship orientation in how they orientate their relationships with service firms. The results of this study are summarized as follows: First, all relational benefits, economic, social, psychological, functional benefits, is related the relationship quality. Second, There is a difference in the perceived relative importance of relational benefits that customers will lead to the establishment of a long-term relationship across the type of service. The more service is customized, the less economic benefits affect relationship quality and the more psychological benefits affect relationship quality. however there isn't a difference in the effect of functional benefits on relationship quality across the types of service, functional benefits are a important benefits both situations. Third, There is a difference in the perceived relative importance of relational benefits that customer will lead to the establishment of a long-term relationship across customers. The more customers orientate their relationships with service firms, the more psychological benefits affect relationship quality. The less customers orientate their relationships with service firms, the more economic and functional benefits affect relationship quality. However there isn't a difference in the effect of social benefits on relationship quality across customers. In addition to, relationship orientation is related to demographic facets such as sex-type, age and income. Male is higher relationship orientation than female. The more customers are older, the more they orientate their relationships with service firms and the more customers have income, the more they orientate their relationships with service firms.

• Journal of Information Management
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• v.38 no.4
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• pp.22-47
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• 2007

Most public libraries construct and operate their websites to provide the various user groups in local communities with internet access in Korea. But the representative public library's websites designed for children who are going to lead the next generation information based society, are unsatisfactory and don't reflect their approaches to information. The main factors of content and circumstance of usage are also extremely poor. Therefore, this research analyzed the construction of websites for children, their interface and design, search services, the contents of provincial representative public libraries amongst public libraries in korea and suggested improvement schemes.

• Journal of Internet Computing and Services
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• v.17 no.5
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• pp.9-16
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• 2016

Pervasive computing and Internet of Things (IoT) have recently received considerable interest to deploy solutions for the future Internet. Smart environments are integrated with Semantic Web to provide context-awareness to the processed information. Self-learning techniques have been adopted within smart solutions for efficient retrieval of data but do not process data with privacy parameters for in-place authorization. To overcome this issue, we present a novel approach of deploying access control as a service mechanism within Semantic Web based smart environment by using eXtensible Access Control Markup Language (XACML). The proposed XACML as a Service (XACMLaaS) approach offers fine-grained access control for protecting information within smart environment. In this paper, we have defined mathematical rules for each components of proposed access control service layer. These rules are for implementation of access control using XACML. The proposed approach allows the adaptation of authorization of information at component level and provides scalable solution for authorization policies and rule enforcement within smart environment.

• Annual Conference of KIPS
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• 2020.11a
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• pp.665-668
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• 2020

대규모 프로젝트나 상호 이질적인 여러 시스템을 보유하고 있는 기관에서는 보통 시스템을 여러개로 나누어 운영하고 있다. 이러한 경우 운영의 효율성을 위해 시스템 통합에 대한 요구가 증가하게 된다. 시스템을 하나로 통합하다 보면 효율적인 운영이 가능하며, 단일화된 서비스를 통해 이용자는 여러 서비스를 한 곳에서 활용할 수 있는 편의성을 제공할 수 있다. 본 연구에서는 통합서비스 구축을 통해 이용자가 여러 서비스를 효율적으로 활용할 수 있는 접근점 중의 하나인 분류체계 구축 방법을 소개하고 실제 구현 사례를 제시한다. 통합서비스 요구분석을 통해 서비스에 필요한 분류체계들을 도출하고 다양한 서비스들을 여러 분류체계에 맞춰 구분함으로써 이용자는 원하는 서비스를 효율적으로 접근할 수 있는 장점이 있다. 이에 통합서비스에서의 분류체계는 중요한 서비스 요소 중의 하나이다. 본 연구결과는 대규모 통합서비스 구축시 필요한 분류체계 구축 절차에 활용될 수 있다.

• International Journal of Computer Science & Network Security
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• v.22 no.3
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• pp.163-172
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• 2022

The interconnection of an enormous number of devices into the Internet at a massive scale is a consequence of the Internet of Things (IoT). As a result, tasks offloading from these IoT devices to remote cloud data centers become expensive and inefficient as their number and amount of its emitted data increase exponentially. It is also a challenge to optimize IoT device energy consumption while meeting its application time deadline and data delivery constraints. Consequently, Fog Computing was proposed to support efficient IoT tasks processing as it has a feature of lower service delay, being adjacent to IoT nodes. However, cloud task offloading is still performed frequently as Fog computing has less resources compared to remote cloud. Thus, optimized schemes are required to correctly characterize and distribute IoT devices tasks offloading in a hybrid IoT, Fog, and cloud paradigm. In this paper, we present a detailed survey and classification of of recently published research articles that address the energy efficiency of task offloading schemes in IoT-Fog-Cloud paradigm. Moreover, we also developed a taxonomy for the classification of these schemes and provided a comparative study of different schemes: by identifying achieved advantage and disadvantage of each scheme, as well its related drawbacks and limitations. Moreover, we also state open research issues in the development of energy efficient, scalable, optimized task offloading schemes for Fog computing.