• Title/Summary/Keyword: Service System Model

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An Empirical Analysis of Public App Performance Based on Information System Success Model: The Moderating Effects of Service Quality of Public Web and Public Value (정보기술성공 모형 기반의 공공앱 성과에 대한 실증분석 : 공공웹 서비스품질과 공공가치의 조절효과)

  • Lee, Soo In;Kim, Sang Hyun
    • The Journal of Information Systems
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    • v.32 no.1
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    • pp.147-178
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    • 2023
  • Purpose The mail goal of this study is to find out factors influencing users' satisfaction of public application with the emphasis of service quality of public web and public value. For this purpose, we applied IS success model to develop the research model that explains users's satisfaction and public performance. Design/methodology/approach The proposed research model was developed based on IS success model along with two moderating effects - Service Quality of Public Web and Public Value in order to empirically test proposed causal relationships withing the model. A total of 377 survey responses were analyzed by forming the structural equation modeling with AMOS 24.0. Findings The analysis results show that the service, information, and system quality from IS success model are positively associated with user satisfaction, which in turn is positively associated with public app performance. The results also show that the relationship between user satisfaction and public app performance is positively moderated by public value. However, the relationship between public app service quality and user satisfaction isn't moderated by public web service quality.

Enhanced distributed streaming system based on RTP/RTSP in resurgent ability (RTP/RTSP 기반 재생기능이 향상된 분산 스트리밍 시스템)

  • Lee, Joo-Yoen;Kim, Jung-Hak;Jung, Jae-Il
    • Proceedings of the Korea Information Processing Society Conference
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    • 2005.05a
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    • pp.213-216
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    • 2005
  • In this paper, we propose the redirect streaming service model to enhance resurgent ability. The system consists of a redirect server, local streaming servers and clients. A redirect server searches the best streaming server. And streaming servers starts a requested service or resumes it when in a trouble. RTSP/RTP is one of the effective solutions to improve QOS in VOD, however a service can be broken off by an overloaded server or network especially in live. We designed and implemented not only a distributed streaming system that solves the broken-off service to enhance a resurgent system, but also DSSP, distributed streaming service protocol, which is adopted to implement this model. Those will improve the performance of streaming service using RTP/RTSP and be contributed to a real time streaming research to solve a service trouble.

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The Optimum Valuation Model Construction Planning Of Port EDI System (항만물류 EDI 시스템의 최적평가모델 구축방안)

  • 한계섭;김현수;박남규;최형림;조재형
    • Proceedings of the Korea Association of Information Systems Conference
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    • 2001.12a
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    • pp.14-30
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    • 2001
  • At present, EDI system is indispensable process in Port and e-logis industry. Using EDI system service has been variably applicable Client/Server system base on 2-Tier, Web EDI and skill oriented distribution object. Up to date, EDI System has been Closed. Moreover it raised several points on User. For settling the problem, A study make progress with Web EDI system, XML/EDl system, distribution object technology based on 3-Tier. This Study produce several EDI system and Service. With a Result of study as the central figure, All kinds of System and Service make a comparative study synthetically in port and e-logis industry. As a result of Study, this paper make an Model Construction Planning for estimating the Port EDI System.

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Service Model Research of Bicycle-sharing based on Mobility-as-a-Service (MaaS) (MaaS(Mobility-as-a-Service)기반 공유자전거 서비스 모델연구)

  • Yang, Wang;Lee, Sung-pil
    • Journal of Service Research and Studies
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    • v.9 no.4
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    • pp.19-40
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    • 2019
  • Mobility as a Service is a service conception to achieve the intelligent transportation system. Its aims to improve the travel experience. In one platform, it connects various transportation modes to offer service and users only need to pay in one time for the whole travel. But the single MaaS platform easily faces the problems such as low user traffic, low retention rate and the access to markets of the this service is still unfound. From the perspective of bicycle-sharing, this research makes the MaaS concept into bicycle-sharing to build a better service model. The bicycle-sharing combine with the MaaS concept is innovative in business model, travel model and service architecture. In addition, this research also tests users' expectations for service model. The research shows that MaaS-based bicycle-sharing could offer flexible and convenient travel experience in the aspects of combined transportation, travel, transfer and payment, and it also makes it possible to make travel services according to need, and sustainable transport.

NFC-based Smartwork Service Model Design (NFC 기반의 스마트워크 서비스 모델 설계)

  • Park, Arum;Kang, Min Su;Jun, Jungho;Lee, Kyoung Jun
    • Journal of Intelligence and Information Systems
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    • v.19 no.2
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    • pp.157-175
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    • 2013
  • Since Korean government announced 'Smartwork promotion strategy' in 2010, Korean firms and government organizations have started to adopt smartwork. However, the smartwork has been implemented only in a few of large enterprises and government organizations rather than SMEs (small and medium enterprises). In USA, both Yahoo! and Best Buy have stopped their flexible work because of its reported low productivity and job loafing problems. In addition, according to the literature on smartwork, we could draw obstacles of smartwork adoption and categorize them into the three types: institutional, organizational, and technological. The first category of smartwork adoption obstacles, institutional, include the difficulties of smartwork performance evaluation metrics, the lack of readiness of organizational processes, limitation of smartwork types and models, lack of employee participation in smartwork adoption procedure, high cost of building smartwork system, and insufficiency of government support. The second category, organizational, includes limitation of the organization hierarchy, wrong perception of employees and employers, a difficulty in close collaboration, low productivity with remote coworkers, insufficient understanding on remote working, and lack of training about smartwork. The third category, technological, obstacles include security concern of mobile work, lack of specialized solution, and lack of adoption and operation know-how. To overcome the current problems of smartwork in reality and the reported obstacles in literature, we suggest a novel smartwork service model based on NFC(Near Field Communication). This paper suggests NFC-based Smartwork Service Model composed of NFC-based Smartworker networking service and NFC-based Smartwork space management service. NFC-based smartworker networking service is comprised of NFC-based communication/SNS service and NFC-based recruiting/job seeking service. NFC-based communication/SNS Service Model supplements the key shortcomings that existing smartwork service model has. By connecting to existing legacy system of a company through NFC tags and systems, the low productivity and the difficulty of collaboration and attendance management can be overcome since managers can get work processing information, work time information and work space information of employees and employees can do real-time communication with coworkers and get location information of coworkers. Shortly, this service model has features such as affordable system cost, provision of location-based information, and possibility of knowledge accumulation. NFC-based recruiting/job-seeking service provides new value by linking NFC tag service and sharing economy sites. This service model has features such as easiness of service attachment and removal, efficient space-based work provision, easy search of location-based recruiting/job-seeking information, and system flexibility. This service model combines advantages of sharing economy sites with the advantages of NFC. By cooperation with sharing economy sites, the model can provide recruiters with human resource who finds not only long-term works but also short-term works. Additionally, SMEs (Small Medium-sized Enterprises) can easily find job seeker by attaching NFC tags to any spaces at which human resource with qualification may be located. In short, this service model helps efficient human resource distribution by providing location of job hunters and job applicants. NFC-based smartwork space management service can promote smartwork by linking NFC tags attached to the work space and existing smartwork system. This service has features such as low cost, provision of indoor and outdoor location information, and customized service. In particular, this model can help small company adopt smartwork system because it is light-weight system and cost-effective compared to existing smartwork system. This paper proposes the scenarios of the service models, the roles and incentives of the participants, and the comparative analysis. The superiority of NFC-based smartwork service model is shown by comparing and analyzing the new service models and the existing service models. The service model can expand scope of enterprises and organizations that adopt smartwork and expand the scope of employees that take advantages of smartwork.

A Study on Web Service Performance Enhancement Using Tuning Model (튜닝 모델을 이용한 웹 서비스 성능 향상에 관한 연구)

  • Oh, Kie-Sung
    • Journal of Information Technology Services
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    • v.4 no.2
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    • pp.125-133
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    • 2005
  • Because of paradigm change to web service, numerous institutes have been suggested supporting solution about web service, and actively developed system using web service but it is hard to find out a systematic study for web service performance enhancement. Generally, there are SOAP message processing improvement and configuration optimization of server viewpoint for web service performance enhancement. Web service performance enhancement through SOAP message processing improvement have been studied related research but configuration optimization of server is hard to find out a systematic tuning model and performance criteria. In this paper, I suggested performance testing based tuning model and criteria of configuration optimization of server viewpoint. We executed practical analysis using tuning model about web service in internet. This paper show that the proposed tuning model and performance criteria is applicable to web service performance enhancement.

Performance Analysis of Service Model between server and client on PMSS System (PMSS 시스템에서 서버/클라이언트 간 서비스 모델의 성능분석)

  • Lee, Min-Hong;Kim, Kyung-Hoon;Nam, Ji-Seung
    • The KIPS Transactions:PartA
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    • v.11A no.3
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    • pp.207-212
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    • 2004
  • This paper provides the higher user QoS(Quality of Service) by analyzing media service model between server and client in single VoD(Video on Demand) environment and applying it to parallel VoD environment. Media service model is divided into the Client Pull, Server Push, and IPP(Interleaving Pull & Push) model. A server sends data based on client's request in the Client Pull Model. A server one-sidedly sends data without client's request in the Server Pull model. And the WP model unites above two models. For a parallel VoD environment, We built the PMSS system which provides the parallel media streaming services that one client is simultaneously served by several servers. In the single and parallel VoD environment, We compare and analyze the performance of service models with respect to network delay and data size in buffer. In this experiment, we found that IPP service model keeps the least network delay and stable client buffer in the parallel VoD environment. This result shows that PMSS can provide the more quality of service.

Puzzle Model and Application for Flooding of Service Tolerance of Security Server System (보안서버시스템의 폭주서비스 감내를 위한 퍼즐 모델 및 응용)

  • Kim Young Soo;Suh Jung Seok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.7
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    • pp.1493-1500
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    • 2004
  • Today's Commercial security server system which provide secrecy, integrity and availability may still be vulnerable to denial-of-service attacks. Authentication system whith use a public key cryptography and process RSA encryption is relatively slow and the slowness has become a major security threat specifically in service flooding attacks caused by authentication requests. The service flooding attacks render the server incapable of providing its service to legitimitive clients. Therefore the importance of implementing systems that prevent denial of service attacks and provide service to legitimitive users cannot be overemphasized. In this paper, we propose a puzzle protocol which applies to authentication model. our gradually strengthening authentication model improves the availability and continuity of services and prevent denial of service attacks and we implement flooding of service tolerance system to verify the efficiency of our model. This system is expected to be ensure in the promotion of reliability.

Stochastic Model for Telecommunication Service Availability (통신 서비스 가용도의 추계적 모델)

  • Ham, Young-Marn;Lee, Kang-Won
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.37 no.1B
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    • pp.50-58
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    • 2012
  • The objective of this study is to develop the theoretical model of the telecommunication system service availability from the user perspective. We assume non-homogeneous Poisson process for the call arrival process and continuous time Markov chain for the system state. The proposed model effectively describes the user model of the user-perceived service reliability by including the time-varying call arrival rate. We also include the operational failure state where the user cannot receive any service even though the system is functioning.

A method to determine optimal input service level in a distribution center-N branches inventory distribution system (물류센터-N 지점 재고시스템의 최적 계획 서비스수준 결정 방법)

  • 윤승철
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.20 no.42
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    • pp.31-38
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    • 1997
  • The main objective of this research is to develop a model to select the optimal input service level for a distribution center - multi branch inventory distribution system. With the continuous review policy, the distribution center places an order for specific order quantity to an outside supplier, and the order quantity is replenished after a certain lead time. Also, each branch places an order for particular order quantity to the distribution center to satisfy the customer demands, and receives the replenishment after a lead time. When an out of stock condition occurs during an order cycle, a backorder is placed to the upper level to fill the unfilled demands. With these situation, variable demand and variable lead time are used for better industrial practice. Further, actual lead times with a generic lead time distribution are used in developing the control model. Under the actual lead time model, the customer service measures actually attained for the distribution center and each branch are explained as the effective customer service measures. Thus, throughout the optimal control (using computer search procedures), we can select the optimal input service levels for the distribution center and each branch to attain the effective service level for each branch which is consistent with the goal level of service for each branch. At the same time, the entire distribution system keeps minimum inventories.

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