• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제9권11호
• /
• pp.4268-4290
• /
• 2015

Future mobile communications face enormous challenges as traditional voice services are replaced with increasing mobile multimedia and data services. To address the vast data traffic volume and the requirement of user Quality of Experience (QoE) in the next generation mobile networks, it is imperative to develop efficient content distribution technique, aiming at significantly reducing redundant data transmissions and improving content delivery performance. On the other hand, in recent years cloud computing as a promising new content-centric paradigm is exploited to fulfil the multimedia requirements by provisioning data and computing resources on demand. In this paper, we propose a cooperative caching framework which implements State based Content Distribution (SCD) algorithm for future mobile networks. In our proposed framework, cloud service providers deploy a plurality of cloudlets in the network forming a Distributed Cloud Service Network (DCSN), and pre-allocate content services in local cloudlets to avoid redundant content transmissions. We use content popularity and content state which is determined by content requests, editorial updates and new arrivals to formulate a content distribution optimization model. Data contents are deployed in local cloudlets according to the optimal solution to achieve the lowest average content delivery latency. We use simulation experiments to validate the effectiveness of our proposed framework. Numerical results show that the proposed framework can significantly improve content cache hit rate, reduce content delivery latency and outbound traffic volume in comparison with known existing caching strategies.

• 디지털융복합연구
• /
• 제3권2호
• /
• pp.73-116
• /
• 2005

When people contact the government they can use a variety of channels. That is, they go in person to an office, use a telephone service, access information via the Internet, send a letter, or use a third party. Since the Australian Government first recognised the potential of online technology to improve service delivery in its 1997 Investing for Growth statement, it has articulated its policies and strategies for e-government in a number of papers. E-government involves government agencies delivering better programs and services online through the use of new information and communication technologies. The policy papers included Government Online-The Commonwealth's Strategy, launched in April 2000, and a new framework for e-government, Better Services. Better Government, launched in November 2002. Most recently, the Government released Australia's Strategic Framework for the Information Economy in July 2004. These papers outlined the broad directions and priorities for the future of e-government in Australia, and sought to maintain the momentum of agencies' actions under Government Online. One of its key objectives was for agencies to achieve greater efficiency in providing services and a return on their investments in ICT (Information and Communication Technology)-based service delivery. They also stated that investing in e-government should deliver tangible returns, whether they take the form of cost reductions, increased efficiency and productivity, or improved services to business and the broader community Implementation of the Government policy has led to considerable agency investment in ICT-based service delivery. However government policy also requires managers to ensure that program and service delivery is efficient and effective. Efficient and effective use of ICT has the potential to improve service delivery and to make financial savings. This paper outlines how people are using the channels to contact the government in Australia. It also examines the level of satisfaction they have with those services and their preferences and expectations. In addition, this paper aims at identifying the methods used by Australian Government to measure the efficiency and effectiveness of their delivery of services, and at assessing the adequacy of these methods.

• 한국건설관리학회논문집
• /
• 제23권1호
• /
• pp.28-36
• /
• 2022

국내에 대규모 거점 공공 체험시설이 건립된 이래로 최근 공공 체험시설 건설사업은 지방자치단체 또는 지방교육청이 단독 발주하거나, 협약하여 공동 발주하는 형태로 변화하고 있다. 특히, 발주 빈도가 적고, 건설사업관리 전문조직을 보유하지 못한 발주기관의 특성상 특화된 발주 프레임워크 개발과 함께 강화된 공공 발주자의 역할이 필요하다. 이에 본 연구에서는 국내의 공공 체험시설 건설사업 발주현황 및 운영실태를 조사하여 현행 공공 발주자 역할의 문제점과 개선방향을 도출하였다. 또한, 사업특성의 영향요인 및 속성정보를 반영한 추진단계와 기능별로 구성된 공공 체험시설 공공 발주자 역할 개선안을 제안하였다.

• Asia pacific journal of information systems
• /
• 제27권3호
• /
• pp.156-175
• /
• 2017

The proposed conceptual framework is based in the relationships among knowledge of personal information security, trust on the personal information security policies of parcel delivery service companies, privacy concern, trust in and risk of parcel delivery services, and user satisfaction with parcel delivery services. Drawing upon both cognitive theory of emotion and cognitive emotion theory that complement each other, we propose a research model and examine the relationships between cognitive and emotional factors and the usage of parcel delivery services. The proposed model is validated using data from customers who have previously used parcel delivery services. The results show a significant relationship between the cognitive and affective factors and the usage of parcel delivery services. This study enhances our understanding of parcel delivery services based on the consumers' psychological processes and presents useful implications on the importance of privacy and security in these services.

• Advances in environmental research
• /
• 제6권1호
• /
• pp.25-33
• /
• 2017

This paper discussed plurality in urban governance in Nigeria and its implication on delivery of urban environmental services, with a focus on water supply, sanitation and solid waste disposal. Conceptually, it explained urban governance as the sum total of the ways of achieving an inclusive city and expressed the urban governance system of Nigeria based the legal framework set for them. The paper explored the environmental implications of urban governance in Nigeria. It concluded that urban governance has several implications on delivery of urban environmental services in Nigeria. The dualism in urban governance is a factor contributing towards inefficient delivery of environmental services such as water supply, sanitation and solid waste management in Nigeria. The paper recommended, among others, a constitutional reform that will guarantee efficient urban governance and delivery of environmental services in Nigeria.

• 한국경영과학회지
• /
• 제16권2호
• /
• pp.125-125
• /
• 1991

This paper presents a framework for the hierarchical PPC(Production Planning and Control) in make-to-order environment with job shop. The characteristics of the environment are described as : 1) project with non-repetitive and individual production, 2) short delivery date, 3) process layout with large scales manufacturing. 4) job shops. The PPC in a make-to-order typically are organized along hierarchical fashions. A model is proposed for the hierarchical job shop scheduling based on new concepts of production system, work and worker organization. Then, a new integrated hierarchical framework is also developed for the PPC based on concepts of the proposed job shops scheduling model. Finally, the proposed framework has been implemented in the Electric Motor Manufacturing and the results showed good performance.

• 경영과학
• /
• 제16권2호
• /
• pp.125-135
• /
• 1999

This paper presents a framework for the hierarchical PPC(Production Planning and Control) in make-to-order environment with job shop. The characteristics of the environment are described as : 1) project with non-repetitive and individual production, 2) short delivery date, 3) process layout with large scales manufacturing. 4) job shops. The PPC in a make-to-order typically are organized along hierarchical fashions. A model is proposed for the hierarchical job shop scheduling based on new concepts of production system, work and worker organization. Then, a new integrated hierarchical framework is also developed for the PPC based on concepts of the proposed job shops scheduling model. Finally, the proposed framework has been implemented in the Electric Motor Manufacturing and the results showed good performance.

• 한국산학기술학회논문지
• /
• 제7권4호
• /
• pp.587-593
• /
• 2006

디지털 정보 혁명과 정보 기술의 발달은 고객의 다양한 욕구를 유발하였고 점차 기업들의 격화된 경쟁하의 생존전략으로서 물류 서비스 향상을 위한 물류 흐름이 기업 경쟁력의 중요한 요소로 부상하고 있다. 또한 공급자와 소비자 간의 정보공유는 기능 중심에서 프로세스 중심이 되면서, 유연성과 고객 서비스를 극대화하기 위한 새로운 물류 개념을 요구하게 되었다. 현재까지 대부분의 수 배송 연구는 방문순서나 방문시간의 제약조건에 따라 수요처에 대한 도착시간 및 선행순서에 대한 제약이 없는 경우의 차량경로문제(VRP)나 시간 및 선행순서에 대한 제약이 있는 경우의 차량일정계획문제(VSP)로 연구되어져 왔다. 그러나 현실적으로는 배송센터에서 제약 조건에 따라 고객까지 차량일정계획 수립을 위한 시간 보다는 배차계획을 수립하는데 더 많은 시간이 소요되는 것으로 알려져 있다. 본 논문은 물류 서비스의 향상을 위한 배차계획 업무의 현실적인 제약 조건들을 고려하여 배차계획 시스템을 설계하고, 이 설계 모듈에 따라 배차계획의 수정작업 조정시간를 효율적이고 획기적으로 줄일 수 있는 배차계획 시스템의 발견적 알고리듬을 설계하고 구현토록 한다.

• 인터넷정보학회논문지
• /
• 제17권5호
• /
• pp.67-74
• /
• 2016

Distributed agile software development faces difficulties for instance lack of visibility across development and delivery processes, complex and disjointed development processes, inability to capitalize on business opportunities, lack of communication agility between disconnected owners, development teams, and users or clients. However these difficulties are solved with the help of cloud computing services. This study proposes a framework to provide a skeletal or structural environment for distributed agile software development in cloud computing environment. The framework guide towards the best tooling to deliver a consistent, automated, governed, and unified agile software development process with reduced technical debt, and minimized project backlog. In addition to this, the study highlights the benefits of cloud computing in agile software development.

• 정보화연구
• /
• 제11권3호
• /
• pp.261-270
• /
• 2014

The utilization of the Mobile Government system is having more than a few challenges including complexity of different mobile technologies, determining interoperability among existing systems and infrastructures, and establishing services with secured networks. To get over those challenges, integrated standard, innovative and comprehensive system architecture is required by the M-Government. Hence this study proposed reference EA framework for M-Government system in order to avoid unnecessary duplication of infrastructure deployment and integrate services among different government instructions. The study based on literature review, and current infrastructure and mobile network situation for delivering Government services of Mongolia. The study recommends innovative m-Government system framework used EA, and scope covered mobile service delivery area centered on G4C and C2G perspectives. The Federal Enterprise Architecture Framework has used in this research, and the proposed system service architecture defines the interoperable standards, infrastructure components, applications, and technologies for government institutions in Mongolia to aid interactions necessity among them to provide m-Service.