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This paper reports on a case study in which Twitter served as a backchannel to mediate and support the peer-teaching activity in a face-to-face, science education traditional course. Surveys and interviews were utilized to understand the effectiveness of the Twitter integration and students' perceived learning in a Twitter-supported peer teaching environment. Tweets and reflections were used to determine...
A unique challenge for SSD storage caching management in a virtual machine (VM) environment is to accomplish the dual objectives: maximizing utilization of shared SSD cache devices and ensuring performance isolation among VMs. In this paper, we present our design and implementation of S-CAVE, a hypervisor-based SSD caching facility, which effectively manages a storage cache in a Multi-VM environment...
MapReduce has become an effective approach to big data analytics in large cluster systems, where SQL-like queries play important roles to interface between users and systems. However, based on our Face book daily operation results, certain types of queries are executed at an unacceptable low speed by Hive (a production SQL-to-MapReduce translator). In this paper, we demonstrate that existing SQL-to-MapReduce...
The present study was undertaken to evaluate the feasibility of Pseudomonas alcaligenes biomass for the removal of strontium ions from aqueous solutions. Batch experiments were performed to study the adsorption of strontium on pH, Pseudomonas alcaligenes biomass adsorbent with respect to initial Sr(II) concentration, contact time and biomass dose. The experimental data were modeled by Langmuir and...
BitTorrent (BT) has carried out a significant and continuously increasing portion of Internet traffic. While several designs have been recently proposed and implemented to improve the resource utilization by bridging the application layer (overlay) and the network layer (underlay), these designs are largely dependent on Internet infrastructures, such as ISPs and CDNs. In addition, they also demand...
In order to increase the output of bioflocculant, improve efficiency and stability of flocculation and reduce the cultivating cost, Pseudomonas fluorescensC-2 strain was cultured in brewery wastewater culture medium where brewery wastewater replaced glucose as carbon source and energy source to produce bioflocculant, then the bioflocculant obtained was applied to treat middle phase wastewater in paper...
Distributed applications are increasingly being built by Web services. This paper explores a dynamic service execution technique on virtual machines to exploit parallelism of service-based applications. The Dynamic service execution technique is able to determine data dependence of service invocations at run-time and executes independent service invocations concurrently with the help of stateless...
Grid computing is a new paradigm for distributed computing, and service has become building block of grid applications. However, current approaches can not free developers from low-level laborious work when building grid applications. We propose a service-oriented virtual machine called Abacus Virtual Machine to simplify the task of grid application development. As a language level virtual machine,...
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