Space- and time-efficient approach for virtual machine provisioning     

胡博林  雷州  许东  李建敦 《上海大学学报(英文版)》2011,15(5):451-455

As a new promising paradigm, cloud computing can make good use of economics of scale and elastically deliver almost any IT related services on demand. Nevertheless, one of the key problems remaining in cloud computing is related to virtual machine images, which require a great amount of space/time to reposit/provision, especially with diverse requests from thousands of users simultaneously. In this paper, by using the splitting and eliminating redundant data techniques, a space and time efficient approach for virtual machines is proposed. The experiments demonstrate that, compared with existing solutions, our approach can conserve more disk space and speed up the provisioning of virtual machines.  相似文献   

Research and implementation of scalable parallel computing based on Map-Reduce     

阮青强  沈文枫  柴亚辉  徐炜民 《上海大学学报(英文版)》2011,15(5):426-429

As a parallel programming model, Map-Reduce is used for distributed computing of massive data. Map-Reduce model encapsulates the details of parallel implementation, fault-tolerant processing, local computing and load balancing, etc., provides a simple but powerful interface. In case of having no clear idea about distributed and parallel programming, this interface can be utilized to save development time. This paper introduces the method of using Hadoop, the open-source Map-Reduce software platform, to combine PCs to carry out scalable parallel computing. Our experiment using 12 PCs to compute N-body problem based on Map-Reduce model shows that we can get a 9.8x speedup ratio. This work indicates that the Map-Reduce can be applied in scalable parallel computing.  相似文献   

TAM模型视角下的大学生手机上网行为研究   总被引：1，自引：0，他引：1  

徐长江  汪媛媛  黄鹏 《现代教育技术》2011,21(1):97-102

以移动环境下普遍使用的手机上网服务为研究对象,通过对大学生的问卷调查,考察了大学生采纳手机上网服务的态度和使用意向的影响因素,提出了基于TAM的大学生手机上网使用行为模型,利用SPSS对模型量表进行分析,并对研究模型假设进行了检验。  相似文献   

基于云教育平台的自主移动学习模型研究   总被引：1，自引：1，他引：0  

李桂英  马力  宁玉文  李贵明 《现代教育技术》2011,21(11):76-79

云教育平台比传统的网络教育平台更适用于移动学习。文章从"云教育"的内涵出发,通过与传统网络教育平台的对比研究,详细分析了云教育平台在移动学习中的优势以及它对移动学:习的改造。最后,基于云教育平台的优势,将移动学习和云平台相结合,构建了一种基于云教育平台的自主移动学习模型。  相似文献   

流动图书馆管理与高职校企合作     

朱正红 《宁波职业技术学院学报》2011,(6):99-100,104

校企合作是高职教育改革的必由之路。图书馆作为学校教学辅助部门,应利用学校馆藏图书资源优势为校企合作平台建设提供服务。图书馆通过流动图书管理模式来服务企业,提升自身内涵发展。  相似文献   

The Reflection-Informed Learning and Instruction to Improve Students’ Academic Success in Undergraduate Classrooms     

Muhsin Menekse 《Journal of Experimental Education》2020,88(2):183-199

Abstract

This study addressed the role of the reflection-informed learning and instruction (RILI) model on students’ academic success by using CourseMIRROR mobile system. We hypothesized that prompting students to reflect on confusing concepts stimulates their self-monitoring activities according to which students are expected to review their understanding, search for related knowledge, and try to identify the confusing concepts. With this student-reflection information, instructors can thus address students’ difficulties effectively, which can lead to enhanced academic success. We tested our hypothesis by conducting a semester-long quasi-experimental study in undergraduate industrial engineering classes (N?=?153). The analyses revealed that students in the RILI condition performed significantly better than students in the control condition (Cohen’s d = .82). In addition, reflection analysis showed that both quality and quantity of reflections were significantly associated with exam performance. Surveys indicated users highly valued the RIFI model; they rated CourseMIRROR favorably and said they would continue to use it in future classes.  相似文献   

面向云计算基础课程的Paxos算法教学设计研究     

杨立君  郭林 《教育技术导刊》2019,18(10):191-194

云计算作为一种新型计算模型,自诞生以来受到了业界与学术界广泛关注,市场规模迅速扩大,国内许多大学的计算机专业都开始关注云计算课程教学。针对云计算课程技术内容新、涉及理论多、应用范围广,以及与商业运营模式结合紧密等特点,以谷歌公司的云计算核心技术分布式锁服务Chubby所采用的Paxos算法为例,对云计算教学内容与教学方法进行设计探究。详细阐述了Paxos算法工作原理,并设计了具体教学案例,该教学方案在实际教学实践中获得了良好的教学效果,加深了学生对Paxos算法的理解。  相似文献   

基于gpsOne平台的移动定位服务     

段美霞  牛铃  徐亮  魏长宝 《天中学刊》2005,20(2):25-27

介绍了移动定位系统的实现方式,重点阐述了基于gpsOne平台的解决方案和工作方式,以及用于手机的gpsOne方案.  相似文献   

移动Agent电子商务信任协商机制的研究     

林昌意 《福建工程学院学报》2006,4(4):421-425

分析了现有的电子商务模式及其存在的弊端，介绍了移动Agent技术及其在电子商务中的应用，并讨论了移动Agent的关键技术——信任协商机制，最后阐述了移动Agent电子商务信任协商系统的设计过程，并指出了其不足与需要改进的地方。  相似文献   

Mobile APP for motivation to learning: an engineering case     

Min Jou  Yen-Ting Lin  Hsieh-Chih Tsai 《Interactive Learning Environments》2016,24(8):2048-2057

Synthesis of Materials is regarded as an important core subject in engineering education. However, many concepts and knowledge in the material synthesis can be rather abstract and difficult to understand by the student learners. Experiments are limited in scope due to lack of equipment, control of toxic materials, and risks of chemical reactions, which often restricts student imagination and student involvement in practical training. These reasons often led to poor learning attitude and learning performance among the students. Rapid developments in Cloud technology and mobile devices have provided new opportunities for developing novel learning tools for material synthesis. This study aims to introduce interest factors as a strategy for promoting learning interest and practical skills among the students. Chemical symbols, experimental themes, texts, and interactive elements were utilized to develop a theme-based Mobile Learning APP for teaching the practical techniques of material synthesis. The Mobile Learning APP was then integrated into a problem-based learning activity. A quasi-experimental design was used to investigate the resulting learning effectiveness from using the developed Mobile Learning APP. Results show that the Mobile Learning APP provided a significant positive effect on learning performance and that most students showed favorable attitudes toward the usage of the mobile learning system.  相似文献