替代性世界：学习环境新方向     

Bebo White  庄秀丽  康文霞 《现代远程教育研究》2010,(5):50-54

教育领域一直以评价和采用交互创新技术为先驱,这些交互创新技术为教育技术专家探索计算机辅助的教学提供了实践的土壤＂。替代性世界＂（Alternative worlds）是完全实时的、高保真的、用户高度介入的学习环境。其特点是具有丰富的环境、丰富的接口、操作驱动和有效应用于教与学＂。替代性世界＂在混合式学习中可以冲破传统教育屏障,拓展教师和学习者角色,为学习者提供时间和空间的便利,实现终身学习＂。替代性世界＂学习环境是一个新的研究领域,它为专注于人机交互、社会网络和虚拟现实的教育技术专家开拓了新方向和新空间。  相似文献   

A facile approach to construct hybrid multi-shell calcium phosphate gene particles     

Zhi-xue Xu  Ran Zhang  You-xiang Wang  Qiao-ling Hu 《Journal of Zhejiang University. Science. B》2010,11(4):292-297

The calcium phosphate (CaP) particles have attracted much attention in gene therapy. How to construct stable gene particles was the determining factor. In this study,hybrid multi-shell CaP gene particles were successfully constructed. First,CaP nanoparticles served as a core and were coated with DNA for colloidal stabilization. The ξ-potential of DNA-coated CaP nanoparticles was -15 mV. Then polyethylenimine (PEI) was added and adsorbed outside of the DNA layer due to the electrostatic attraction. The ξ-pot...  相似文献   

复合图书馆期刊服务探析   总被引：1，自引：0，他引：1  

李兰 《江西图书馆学刊》2006,36(2):66-67

随着文献载体形式的发展和传递方式的改变,一个集传统与现代、静态与动态相结合的复合图书馆正向我们走来。从现实工作出发,分析了处于转型期复合图书馆期刊工作的特点与存在的问题,提出期刊服务模式的创新思路。  相似文献   

What makes learners a good fit for hybrid learning? Learning competences as predictors of experience and satisfaction in hybrid learning space     

Jun Xiao  Hong-Zheng Sun-Lin  Tzu-Han Lin  Mengyuan Li  Zhimin Pan  Hsu-Chen Cheng 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1203-1219

Compared with fully face-to-face or online learning environments, implementation of hybrid learning spaces is costly given the spaces making all learning options available for learners. Therefore, decisions on investments in hybrid learning are critical for institutions. Satisfaction and experience of learners is one of the important indicators for assessing the cost-effectiveness of learning space implementation; thus, predictions of learners' satisfaction and experience can inform institutions' decision making on learning space investments. Moreover, learning competences are found correlated with learners' satisfaction and experience in general and e-learning settings. Therefore, the present study aimed at exploring predictive learning competences for hybrid learners' experience and satisfaction. A hybrid learning space was built upon a proposed model at Shanghai Open University. 211 students’ learning competences and their satisfaction and experience in the hybrid learning space were examined. The results showed that except cognitive engagement competence, most predictive competences were not significantly associated with hybrid learners' satisfaction and experience. The findings indicated that since hybrid learning keeps all options available, to experience satisfying learning, students need not have certain competences but cognitive engagement competence, which is correlated with learners' cognitive ability to figure out the right mix of learning options.  相似文献   

Sampled-data control for time-delay systems   总被引：1，自引：0，他引：1  

Lisheng HuChuwang Cheng  Huihe Shao 《Journal of The Franklin Institute》2002,339(2):231-238

The sampled-data systems are hybrid ones involving continuous time and discrete time signals, which makes the traditional analysis and synthesis methodologies of time-delay systems unable to be directly used in the cases of hybrid systems with time-delay. The primary disadvantages of current design techniques of sampled-data control are their inabilities to deal effectively with time-delay and the model uncertainty. In this paper, we generalized the analysis methodology of time-delay systems to that of the hybrid systems with time-delay and uncertainty, which developed a design procedure of sampled-data control for time-delay systems. Asymptotic stability of the time-delay hybrid systems was developed. The time-delay dependent robust sampled-data control for the time-varying delay of an uncertain linear system was then discussed. The results were described as linear matrix inequalities, which can be solved using newly released LMITool.  相似文献   

Virtual and Traditional Feedback-Seeking Behaviors: Underlying Competitive Attitudes and Consequent Grade Performance     

Alvin Hwang  J. B. Arbaugh 《Decision Sciences Journal of Innovative Education》2006,4(1):1-28

The electronic medium continues to play an increasingly important role in the delivery of management education despite a paucity of empirical studies on its impact and efficacy. Results from a study of competitive attitudes and feedback‐seeking behaviors across seven “hybrid” electronic cum live classes showed that Kiasu‐Negative (a competitive attitude directed at preventing others from getting ahead of oneself) and Kiasu‐Positive (a competitive attitude directed at personal diligence to get ahead of others) ( Hwang, Ang, & Francesco, 2002 ) were related to two electronic discussion board feedback‐seeking behaviors. These feedback‐seeking behaviors, in turn, were related to grade performance as measured by multiple‐choice tests. Traditional feedback‐seeking measures of asking the professor in class or outside the class, and checking with fellow students for their views on class topics did not have a positive influence on multiple‐choice test performance. In light of these findings, educators should consider how best to encourage participation on electronic discussion boards for hybrid type courses, while researchers should further examine the underlying causes of learning from such electronic exchanges. Other implications of these findings are also discussed.  相似文献   

Hybrid heuristic and mathematical programming in oil pipelines networks： Use of immigrants     

DELACRUZJ.M. HERRAN-GONZALEZA. RISCO-MARTINJ.L. ANDRES-TOROB. 《浙江大学学报(A卷英文版)》2005,6(1):9-19

We solve the problem of petroleum products distribution through oil pipelines networks. This problem is modelled and solved using two techniques: A heuristic method like a multiobjective evolutionary algorithm and Mathematical Programming. In the multiobjective evolutionary algorithm, several objective functions are defined to express the goals of the solutions as well as the preferences among them. Some constraints are included as hard objective functions and some are evaluated through a …  相似文献   

Three cases of hybridity in learning spaces: Towards a design for a Zone of Possibility     

John Cook  Yishay Mor  Patricia Santos 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1155-1167

The paper contributes to design discourse by drawing on Educational Design Research (EDR) that has been conducted into what we call a Zone of Possibility (ZoP) over the past seven years. We define a ZoP as a place where individuals can overcome the constraints of expectations and power structures to effect desired change. Specifically, this paper presents details of how our initial research question (RQ1) has evolved to the one presented in the conclusions (RQ2); both RQs are summarised below in the section “Research Questions.” To describe this evolution, the paper is presented as 3 cases (Confer, ZoP Stokes Croft and Google Lens in HE) that have provided insights to explore the concept of the ZoP and its implications for EDR. Specifically, one of the main conclusions is the importance of bridging positioning practices as “successful communication” and an understanding of social context in hybrid contexts (ie, the ZoP).  相似文献   

分布式检索中查询结果合并方法研究   总被引：2，自引：0，他引：2  

刘婧  袁可  蒋伟 《情报学报》2009,28(5)

查询结果合并是分布式信息检索中的一个重要步骤,其合并方法的选择直接影响检索结果的质量.本文首先对两种查询结果合并算法,即经典的CORI算法与新近提出的回归分析与选择下载相结合的Hybrid算法的基本原理进行了讨论研究,然后通过实验对这两种算法的性能进行了深入的比较分析.在实验过程中,采用平均准确率指标对检索结果进行评价.通过比较两种合并算法产生的平均准确率来评价二者的性能.结果表明,在不同的实验环境下,新的Hybrid算法的性能都要优于CORI算法.选择Hybrid算法进行查询结果合并能够取得令人满意的结果,比较适合作为分布式检索的查询结果合并算法.  相似文献   

“Wearing a mask” vs. connecting identity with learning     

Beverly S. Faircloth 《Contemporary educational psychology》2012

Contemporary insights regarding identity emphasize its situated, negotiated nature (i.e., identity is shaped by – and shapes in response – the contexts in which it is formed;  and ) Recent work also suggests that this identity/context intersection holds powerful implications regarding engagement in learning (Brophy, 2008). This pair of qualitative studies drew from contemporary models connecting learning with identity (Study 1: cultural modeling, Lee, 2007 and third-space/hybrid-identities, Gutiérrez, 2008; Study 2: Kids’ business inquiry projects, Fairbanks, 2000) to explore the nature and impact of such connections among disaffected ninth-grade English students at a high-needs school. Results demonstrate evidence of: (1) a significant connection between identity and learning; (2) students’ negotiation of engaged patterns of participation; (3) the relevance of student voice to this process; and (4) the impact of connections between identity and learning on students’ participation in, and affective response to, learning.  相似文献