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Smart-home is becoming increasingly popular in recent years, and it introduces a new content retrieval paradigm - delay-insensitive downloading. In this new paradigm, users do not require the content retrieval task to finish as soon as possible, but only set a deadline for it. We study the role of this paradigm in the traffic engineering of a chunk-based cloud storage service. We propose that it could...
As cloud computing becomes widespread, more and more users prefer to outsource their local sensitive data into the cloud. In order to protect data privacy, these sensitive data usually has to be encrypted before outsourcing, which makes effective data utilization a very difficult task. Although traditional searchable encryption techniques allow users to securely search over encrypted cloud data, they...
With the rapid development of wireless communication technology and mobile devices, network traffic on smart mobile devices has increased gradually. VoIP is a well-known and mature technology and communication anywhere is emerging as an important application that requires an entirely different way of thinking about communications. In practice VoIP system one kind of issue that vitally impacts the...
In the field of high performance computing (HPC), energy consumption is an increasingly important consideration. The Standard Performance Evaluation Corporation (SPEC) Power benchmark and the Green500 are two well-known power evaluation methods. However, the former focuses on data centers and the latter concentrates on compute-intensive applications. This paper focuses on the power evaluation of single...
Crowdsourcing-based video service systems, e.g., Thunder Crystal, are novel content distribution platforms composed by a large number of agent devices, acting like miniservers. Most agents are normal Internet users who would like to earn rewarded cash by uploading content through their devices. Compared with CDN, the bandwidth cost is much cheaper; while compared with Peer-to-Peer(P2P), the bandwidth...
With the rapid development of electric power information technology, has been expanding its business system, the investment cost is rising, at the same time, due to the busy business application widespread idle cycles, lead to equipment use efficiency is not high. Virtualization technology can effectively improve equipment load rate, saving the cost of investment and data center energy consumption...
Popular online Video-on-Demand (VoD) services all maintain a large catalog of videos for their users to access. The number of servers assigned to serve each video is directly related to the relative popularity of the video. The distribution of popularity at a given time is quite well understood. We study how the video popularity changes over its lifetime, for different types of videos. Our study is...
We introduce a model for secure managing virtual infrastructure in IaaS Cloud which called Trusted Private Virtual Data center (TVPDc). It can offer centralized management of the computing and storage resources distributed in different locations and physical machines within an IaaS cloud. Additionally, we propose a hierarchical management framework and a TVPDc establishment and deployment protocol...
Service selection is an important issue of Service-oriented computing (SOC), which is a fundamental step to the composition of complex and large-grained services from single-function components. Skyline operation is recently adopted to select candidate services for composition, as skyline services have better QoS. However, the fast increasing web services, multiple quality attributes to be considered,...
Fast skyline selection of high-quality web services is of critically importance to upgrade e-commerce and various cloud applications. In this paper, we present a new MapReduce Skyline method for scalable parallel skyline query processing. Our new angular partitioning of the data space reduces the processing time in selecting optimal skyline services. Our method shortens the Reduce time significantly...
In order to solve the problems such as poor data storage efficiency, data security and reliability, low resource utilization and high input costs existing in current cloud storage, an Hadoop-based efficient economic cloud storage system is proposed. The techniques of Hadoop, an efficient resource scheduling method and a probabilistic redundant scheduling are presented for the system to efficiently...
With the development of Internet and Service/Cloud computing, more and more underlying web services are horizontally distributed on geographically distance servers connected with Internet. Inspired by MapReduce, we design a system architecture and Preprune-Refine framework in this paper to handle these distributed web services. Extensive experiments show that our Preprune-Refine framework performs...
Pathfinding approaches that work for console games fail to meet the challenges of online games due to the distinct requirements of online games. This paper proposes an implementable heuristic approach for online game pathfinding so as to increase the efficiency and overall performance of the game systems. With a distributed structure, the heuristic approach first pre-computes paths among non-overlapped...
Engineering Computational Service Grid Portal (ECSGP) is an engineering computational environment for integrating design resources effectively by using Grid portal technology. For ECSGP, the secure job process by integrating proxy credential, authentication trust level, and secure BPEL(Business Process Execution Language) engine is proposed, and the implementation technologies are analyzed in this...
The method for applying web service technology to implement invocation of product design resources based on the inheritance mechanism of remote component class is introduced, the detailed account of operating process is given, a prototype system is developed, and the speed reducer is illustrated to validate the proposed method.
Action planning is one of the pivot issues in robot telecontrol, in which the action instructions are often given by the controller from remote site with the help of vision systems. In this paper, we present a learning-based strategy for action planning in robot telecontrol, in which the parameters of sophisticated actions of the remote robot equipped with a binocular vision system could be pre-scheduled...
This study proposed integrating Mobile RFID and IPv6 mechanisms, in order for mobile phones to read ID labels on posters, acquire data via mobile network without need of data transmission and conversion by several servers. This mechanism could reduce data transmissions and waiting time of users, and provide the users with more convenient applications. Moreover, the proposed architecture complies with...
Almost everyone today has his or her mobile phone and Bluetooth has already become a standard inclusion on most mobile phones, laptops and PDAs. Data transfer through Bluetooth among the handheld devices is common and popular. Bluetooth establishes links in a more convenient manner to facilitate sharing data between devices. It motivates us to apply this technology to hypermarket advertising. In this...
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