• Title/Summary/Keyword: Charged Service

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An Experimental study on the Method of Detection and Blocking against SIP Flooding (SIP 플러딩 탐지 차단 실험방법에 대한 연구)

  • Choi, Hee Sik;Park, Jae Pyo;Jun, Mun Seog
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.7 no.2
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    • pp.39-46
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    • 2011
  • Privacy IP hacking problems such as invasion of privacy, password cracking, voice wiretapping and internet over charged occurred, because VoIP internet voice phone service gradually spread. This thesis attempted to attack the VoIP service network by application. First use application to spoof IP address then attempted wiretap the VoIP service and sends a lot of messages to disturb service movement. At this point, we connected VoIP soft terminal, so we can operate real-time filtering operator to block the SIP Flooding offence by monitor the traffic and detect the location where it got attacked. This thesis used experiment to prove it is possible to detect the offence and defend from SIP Flooding offence.

A Study of the Management of e-Book and its Service Scheme in Libraries (도서관에서의 전자책 관리와 서비스 방안에 관한 연구 - 대구.경북지역 도서관을 중심으로 -)

  • Jung, Jin-Han;Park, Il-Jong
    • Journal of Information Management
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    • v.38 no.3
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    • pp.31-58
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    • 2007
  • The survey and interview about the management of e-book and its service scheme to the librarians who are actually charged with e-book service in libraries were performed and analyzed in this study. The objective of this study was to help the vitalization of e-book use and the realization of complete digital library based on the data.

Pricing·Quality and Service Mix Strategies for Portal Sites Providing Various Services (다양한 서비스를 제공하는 포털 사이트의 가격·품질 및 서비스 믹스 전략)

  • Lee, Kang Bae;Joo, Cheol Min;Lee, Woon-Seek
    • Journal of Korean Institute of Industrial Engineers
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    • v.28 no.3
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    • pp.291-301
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    • 2002
  • In this paper, we introduce a mathematical model to analyze pricing/quality and service mix strategies for Internet Portal site. This model includes utilities and costs of each participants, i.e., user, third party provider, and portal sites. Especially, we consider portal sites that initiate their businesses by providing free services like free e-mail service or search service and providing several charged services. As the results, we can find that Portal sites should make the target of customers and focus them to maximize their profit. Portal sites should pay their marketing effort not for all customers but pertinent portions of customers. And Portal sites should make more efforts to efficiently develop and provision their services.

Reignition system for synthetic short-circuit test (합성단락시험용 재점호장치)

  • Park, Seung-Jae;Kim, Maeng-Hyun;Kang, Young-Sig;Shin, Young-June;Koh, Heui-Sek
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.1856-1858
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    • 2000
  • This paper describes the principles of reignition system which has newly been developed and used as KERI's high power testing facilities. Synthetic short-circuit testing method is generally adopted to perform the short-circuit test of the ultra high-voltage circuit breakers, which consists of two separated sources such as the current source from short-circuit generator and the voltage source from charged energy in capacitor. And, in case of synthetic short-circuit test, it will be necessary to use the reignition system in order to extending the arcing time of the circuit breaker and provide the arc energy equivalent to the direct testing method.

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The Elderly and Social Worker′s Needs for Housing Services in Community Care - To Develop Senior Congregate Housing in Community Care - (지역사회보호체계를 위한 수요자와 복지서비스 전달자의 노인주거 서비스 요구도 - 노인공동생활주택 개발을 위한 지역사회보호의 체계화 -)

  • 홍형옥;지은영
    • Journal of Families and Better Life
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    • v.22 no.2
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    • pp.1-12
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    • 2004
  • This study was designed to search for the direction to develop housing service which assists the older people to live independently in their community and provides the systematization of community care. The subjects of the research include 533 older people between the age of 60 to 79 residing in Seoul and 84 welfare officials at a dong(in)-office and 67 social workers working at comprehensive social welfare institutions. The results were as follows: Both demanders and deliverers recognized that housing service for older people was necessary for community care, and, in particular, the deliverers had higher degree of necessity as people charged in welfare service. The most needed service was community alarm service which currently is proceeded partially for low-income and living-alone olders. It needed to expand the scope of the people to be served. It appeared that the need for inside safety measures rather than for housing space or structural problems. It requires less effort and cost for those who need simple repair, such as safety grips or slippery protection, and safety checks. Among financial support services, the need for tax benefits appeared the most necessary service for the older people. It suggested that more 'direct' financial support service is needed for the elderly people.

A Method to Calculate Charge for Reactive Power Service under Competition of Electric Power Utilities

  • Ro, Kyoung-Soo;Park, Sung-Chul
    • KIEE International Transactions on Power Engineering
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    • v.11A no.4
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    • pp.39-44
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    • 2001
  • As electric power systems have been moving from vertically integrated utilities to a deregulated environment, the charging of reactive power management is a new challenging them for market operators. This paper proposes a new methodology to compute the costs of providing reactive power management service in a competitive electrical power market. The proposed formulation, which is basically different from those shown in the literature, consists of two parts. One is to recover investment capital costs of reactive power supporting equipment based on a reactive power flow tracing algorithm. The other is to recover operational costs based on variable spot prices using the optimal power flow algorithm. The charging shapes resulted from the proposed approach exhibit a quite good meaning viewed from a practical sense. It turns out that reactive power charged are mostly due to recovery of capital costs and slightly due to recovery of operational costs. The methods can be useful in providing additional insight into power system operation and can be used to determined tariffs of a reactive power management service.

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Web Service Application for Machine Tool Fault with Open Architecture CNC (개방형 CNC를 가지는 공작기계의 고장진단과 웹 서비스 기술)

  • 김동훈;김선호;윤원수;고광식
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2003.06a
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    • pp.121-124
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    • 2003
  • The conventional CNC(Computerized Numerical Controller) of machine tool, which is dependent to CNC maker, was a closed architecture type. Therefore, it is impossible to implement a special user-define function to CNC. But recently, CNC is changed to OAC(Open Architecture Controller) type increasingly and the general function of CNC can be upgrade efficiently. This paper describes web service application for remote monitoring regarding the faults or machine tool with open architecture CNC. The major faults of CNC machine tool can be defined to the operational faults to be charged over 70%. Those faults are unpredictable because of being occurred without any warning. To generalize the fault diagnosis efficiently. two diagnosis models such as SF(Switching Function) and SSF(Step Switching Function) are proposed and the function of fault diagnosis is implemented to internal function of OAC. Also, to service remotely the faults of CNC machine tool. the suitable web environment is proposed and practical function is programmed to evaluate its operation on web.

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CADRAM - Cooperative Agents Dynamic Resource Allocation and Monitoring in Cloud Computing

  • Abdullah, M.;Surputheen, M. Mohamed
    • International Journal of Computer Science & Network Security
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    • v.22 no.3
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    • pp.95-100
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    • 2022
  • Cloud computing platform is a shared pool of resources and services with various kind of models delivered to the customers through the Internet. The methods include an on-demand dynamically-scalable form charged using a pay-per-use model. The main problem with this model is the allocation of resource in dynamic. In this paper, we have proposed a mechanism to optimize the resource provisioning task by reducing the job completion time while, minimizing the associated cost. We present the Cooperative Agents Dynamic Resource Allocation and Monitoring in Cloud Computing CADRAM system, which includes more than one agent in order to manage and observe resource provided by the service provider while considering the Clients' quality of service (QoS) requirements as defined in the service-level agreement (SLA). Moreover, CADRAM contains a new Virtual Machine (VM) selection algorithm called the Node Failure Discovery (NFD) algorithm. The performance of the CADRAM system is evaluated using the CloudSim tool. The results illustrated that CADRAM system increases resource utilization and decreases power consumption while avoiding SLA violations.

Development of a Hospital Service-based Costing System and Its Application (병원서비스별 원가분석모형의 개발과 적용)

  • 박하영
    • Health Policy and Management
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    • v.5 no.2
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    • pp.35-69
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    • 1995
  • The managerial environment of hospitals in Korea characterized by low levels of medical insurance fees is worsening by increasing government regulations as to the utilization of medical services, rising costs of labor, material, and medical equipments, growing patient expectations concerning the quality of services, and escalating competitions among large hospitals in the market. Hospitals should seek for their survival strategies in this harsh environment and they should have information about costs of their products in doing so. However, it has not been available due to the complexity of the production process of hospital services. The objectives of this study were to develop a service-based cost accounting model and to apply the developed model to a study hospital to obtain cost information of hospital services. A model commonly used for the job-order product cost accounting in the manufacturing industry was modified for the use in hospitals in Korea. Actual costs, instead of standard costs, incurred to produce a unit of services during a given period of time were estimated in the model. Data required to implement the model included financial information, statistics for the allocation of supportive cost center costs to final cost centers, statistics for the allocation of final cost center costs to services, and the volume of each services charged to patients during a study period. The model was executed using data of a university teaching hospital located in Seoul for the fiscal year 1992. Data for financial information, allocation statistics fo supportive service costs, and the volume of services, most of them in electronic form, were available to the study. Data for allocation statistics of final cost center costs were collected in the study. There were 15 types of evaluation and management service, 2, 923 types of technical service, and 2, 608 types of drug and material service charged to patients in the study hospital during the fiscal year 1992. Labor costs of each of seven types of pesonnel, material costs of 611 types of drugs and materials, and depreciation costs of 212 types of medical equipments, miscellaneous costs, and indirect costs incurred in producing a unit of each services were estimated. Medical insurance fees for basic services such as evaluation and management of inpatients and outpatients, injection, and filling prescriptions, and for operating procedures were found to be set lower than costs. Infrequent services which use expensive medical equipments showed negative revenuse as well. On the other hand, fees for services not covered by the insurance such as CT, MRI and Sonogram, and for laboratory tests were higher than costs. This study has a significance in making it possible for a hospital to obtain cost information for all types of services which produced income based on all types of expenses incurred during a given period of time. This information can assist the management of a hospital in finding an effective cost reduction strategy, an efficient service-mix strategy under a given fee structure, and an optimum strategy for within-hospital resource allocations.

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XML-based Single Sign-On Scheme for Internet Protocol TV(IPTV)Services (IPTV 서비스 제공을 위한 XML 기반의 단일인증 구조)

  • Lee, Seung-Hun;Shin, Dong-Il;Shin, Dong-Kyoo
    • Journal of Broadcast Engineering
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    • v.14 no.4
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    • pp.463-474
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    • 2009
  • By employing the subscriber concept in broadcasting services, IPTV (Internet Protocol Television) operators provide various grades of services to subscribers based on the billing level of the subscribers. With the income from subscribers for a basis, IPTV operators plan to provide high quality services. Since Web browser-based IPTV provides T-commerce and E-commerce services as well as television services, users may frequently visit other service domains to buy goods or content. To provide the user with charged or private services, these service domains request authentication of user. The existing authentication system is not appropriate for the IPTV service environment because the environment unavoidably forces the user to cross from one authentication-based service domain to another. Single sign-on provides a user with transparent authentication services by enabling an authenticated user to move between authentication-based service domains without any re-authentication. Like this distributed environment, since the IPTV service environment also provides a variety of authentication-based services, transparent authentication service needs to be provided to subscribers who want to access charged or private services. In this paper, we propose a new user authentication scheme for the IPTV environment. This scheme integrates the Security Assertion Markup Language (SAML), which is a standard for XML-based single sign on. We validate this scheme using a simple use case scenario.