Pedagogical and technological augmentation of mobile learning for young children interactive learning environments     

Yanghee Kim  Diantha Smith 《Interactive Learning Environments》2017,25(1):4-16

The ubiquity and educational potential of mobile applications are well acknowledged. This paper proposes six theory-based, pedagogical strategies to guide interaction design of mobile apps for young children. Also, to augment the capabilities of mobile devices, we used a humanoid robot integrated with a smartphone and developed an English-learning app that applied the design strategies to this environment. Our observations of children's one-on-one use support the promise of the strategies and the combined use of robots and mobile devices to be a viable option to help optimize mobile learning.  相似文献   

移动自组网AODV多路径路由研究     

范业仙 《宁德师专学报(自然科学版)》2007,19(2):141-144

AODV协议是唯一通过IETF批准成为RFC文档的移动自组网按需控制路由协议．分析AODV路由协议工作过程及优缺点，并介绍了几种典型的基于AODV的多路径路由改进协议，最后对这些多路径协议进行优缺点分析及性能比较。  相似文献   

可信计算软件栈的体系研究     

孙琪  杨昌  张淼  沈志东  张焕国 《楚雄师范学院学报》2006,21(12):33-36,39

近年来,随着互联网的信息安全问题逐渐得到注重,提高计算机的安全防护能力已经成为广大网络用户最关心的问题,而与之相关的可信计算的概念也不断升温,成为信息安全领域的热门话题。本文综述了可信计算的相关概念,包括可信计算平台的基础概念和体系结构。重点介绍了基于可信计算平台的软件栈,详细描述了它的基本原理、体系结构和应用研究。  相似文献   

我的地盘我做主 --试论作为新兴文体的手机短信及其写作     

廖斌 《南平师专学报》2005,24(3):63-64,41

本文从修辞学、后现代理论等方面论述了手机短信与当代人生活的紧密关联，门派归宗及基本特征，并从写作技法上进行了大致的归纳，指出学界目前需要对手机短信这一新兴文种进行规范扶植。  相似文献   

基于云计算的应用架构和服务模式研究   总被引：1，自引：0，他引：1  

温晓宇 《南宁职业技术学院学报》2011,(5):97-100

从云计算的内涵、特点入手,系统性地总结和分析云计算的服务特点与设计理念,在此基础上,针对云计算对用户应用影响面最广的问题,归纳并提出了云计算机的三种基本服务模式:基于基础设施的服务、基于通用平台的服务、基于个性化用户功能的服务,分别对每一种服务模式特点和适应面进行研究。最后总结出云计算在发展过程中需要解决的几个关键问题。  相似文献   

云计算的关键技术及发展现状     

李析  廖志恒 《九江职业技术学院学报》2011,(2):24-25

云计算是一种基于互联网的计算方式,通过这种方式,可以将共享的软硬件资源和信息按需提供给计算机和其他设备。本文主要解释了云计算的概念,详细介绍了云计算的关键技术和发展现状。  相似文献   

Nearest neighbor search algorithm based on multiple background grids for fluid simulation     

郑德群  武频  尚伟烈  曹啸鹏 《上海大学学报(英文版)》2011,15(5):405-408

The core of smoothed particle hydrodynamics (SPH) is the nearest neighbor search subroutine. In this paper, a nearest neighbor search algorithm which is based on multiple background grids and support variable smooth length is introduced. Through tested on lid driven cavity flow, it is clear that this method can provide high accuracy. Analysis and experiments have been made on its parallelism, and the results show that this method has better parallelism and with adding processors its accuracy become higher, thus it achieves that efficiency grows in pace with accuracy.  相似文献   

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   

主体材料对磷光染料掺杂聚合物薄膜光谱性质的影响     

马良 《闽江学院学报》2011,32(2):114-117

研究了以（PPQ）2Ir（acac）为客体,分别以PFO、PVK、PFB和PFG四种不同聚合物为主体掺杂体系的光谱性质.各种材料的紫外-可见吸收光谱和光致发光光谱的性质表明PVK和PFO与客体之间可以发生有效的能量转移.此外,与光致发光谱不同,发光器件电致发光光谱有较纯的红光发射,表明除了能量转移之外,电荷捕获也是实现器件红色发光的主要原因之一.  相似文献