从知识内化的角度论如何提升翻转课堂中学生的自主学习能力

翻转课堂带来了教学流程的逆序,但我们对翻转课堂的认识不能只停留在流程的逆序层面,需要从知识内化的角度看是否真正地发生了知识的内化。自主学习能力在翻转课堂中起到了重要的作用,着重从知识内化的角度提出了翻转课堂中提升学生自主学习能力的策略,从宏观和微观两个层面进行了论述,主要包括学校课程的总体设计、微视频、学生基本情况分析、教学策略的选择等方面。     

Scaffolding wiki‐supported collaborative learning for small‐group projects and whole‐class collaborative knowledge building

While educators value wikis' potential, wikis may fail to support collaborative constructive learning without careful scaffolding. This article proposes literature‐based instructional methods, revised based on two expert instructors' input, presents the collected empirical evidence on the effects of these methods and proposes directions for future refinements. The instructional methods were implemented by an expert instructor teaching a 12‐week 68‐student undergraduate design class in Canada. Data were collected from observations, interviews and content analysis of wikis. The findings revealed that in small‐group project (SGP), the wiki instructional methods enhanced collaborative learning with most instructional methods derived from cooperative learning, but in whole‐class collaborative knowledge building (CKB), the wiki instructional mehtods failed to turn the class into a self‐sustained learning community after the scaffolding faded. We conclude that the genre of wikis should be different for SGP and CKB. While the students easily adopted the ‘reproduced’ genre of wikis for SGP with familiar tasks, they felt overwhelmed or resistant to the unfamiliar ‘emergent’ genre of wikis for CKB in massive collaborative constructive learning. Therefore, we propose that future refinements for wiki‐supported CKB should focus on providing students scaffolding for intersubjectivity (understanding collaborative constructive learning) and transfer of responsibility (developing autonomy).     

Epistemic activities and collaborative learning: towards an analytical model for studying knowledge construction in networked learning settings

The aim of this paper is to provide an analytical model for studying knowledge creation among geographically dispersed students in an online postgraduate programme by using the concept of epistemic activity. Rooted in qualitative methodologies, it takes a case study approach which strengthens the grounding of theory on social learning by using triangulation of evidence from online discussions and seven semi‐structured interviews. The analytical model that emerges, distinguishes a set of moves that serve understanding negotiation of meaning and co‐construction of knowledge in online discussion. The findings of the study suggest that knowledge advancement processes can be understood as part of identifying key strategies in the form of online epistemic activities for postgraduate learners in a networked learning context. The paper offers a conceptual account for researching knowledge construction in higher education.     

A cross‐cultural study of the effect of a graph‐oriented computer‐assisted project‐based learning environment on middle school students' science knowledge and argumentation skills

The purpose of this mixed‐methods study was to explore how seventh graders in a suburban school in the United States and sixth graders in an urban school in Taiwan developed argumentation skills and science knowledge in a project‐based learning environment that incorporated a graph‐oriented, computer‐assisted application (GOCAA). A total of 42 students comprised the treatment condition and were engaged in a project‐based learning environment that incorporated a GOCAA. Of these 42 students, 21 were located in the United States and 21 were located in Taiwan. A total of 26 students comprised the control condition and were engaged in a project‐based learning environment without the GOCAA. Of these 26 students, 15 were in the United States and 11 were in Taiwan. In each country, verbal collaborative argumentation was recorded and the students' post‐essays were collected. A one‐way analysis of variance (ANOVA) was conducted for each measure of science knowledge about alternative energies. The results showed a significant treatment effect for the outcome of scientific explanation among U.S. students, while among Taiwanese students, a significant treatment effect on scientific facts was observed. A one‐way ANOVA was additionally conducted for each measure of argumentation skills and a significant treatment effect on counterarguments and rebuttals was observed among the U.S. students, while in Taiwan, a significant treatment effect on reasoning and rebuttals was observed. A qualitative analysis was conducted to examine how the GOCAA supported students' development of argumentation skills in different countries. This study found distinct argumentation patterns between the U.S. and Taiwanese intervention teams. Additionally, a distinct gender difference in the use of evidence and division of labour was noted when the Taiwanese teams were compared with the U.S. teams, which may be explained by cultural differences. This study concluded that, in both the United States and Taiwan, a project‐based learning environment incorporating a GOCAA was effective in improving students' science knowledge and developing their scientific argumentation skills.     

基于知识的协同设计任务分配双向选择模型

针对协同设计任务分配中忽略设计人员自我发展需求的问题,在对设计人员知识作业过程进行分析的基础上,提出显性知识的学习模型和知识集合的概念,并构建了一个能实现任务与设计人员之间双向选择的优化模型,从而实现任务的合理分配,达到任务完成时间最短和设计人员知识学习最大化之间的平衡。最后,通过算例分析验证了模型的有效性：模型的使用有利于设计人员知识扩容;模型的循环使用对完成任务时间的缩短有利。     

Contextual perspective in analysing collaborative knowledge construction of two small groups in web-based discussion

This paper presents a methodology designed to explore the role of context in collaborative knowledge construction activity in asynchronous web-based discussion. The discussions of two student groups participating in a web-based teacher education course were compared. The comparison aimed to highlight the differences and similarities between the groups’ knowledge construction activity through studying the thematic structure, communicative functions and contextual resources used in their discussions. The results indicated that the different backgrounds of the two student groups influenced the way context was created and interpreted, and how meanings were negotiated. The differences and similarities between the groups’ activity illuminated the situated and mediated nature of learning. The possibilities of the methodology used in this study for evaluating collaborative knowledge construction in context are also discussed.     

The effect of a graph‐oriented computer‐assisted project‐based learning environment on argumentation skills

The purpose of this quasi‐experimental study was to explore how seventh graders in a suburban school in the United States developed argumentation skills and science knowledge in a project‐based learning environment that incorporated a graph‐oriented, computer‐assisted application. A total of 54 students (three classes) comprised this treatment condition and were engaged in a project‐based learning environment that incorporated a graph‐oriented, computer‐assisted application, whereas a total of 57 students (three classes) comprised the control condition and were engaged in a project‐based learning environment without this graph‐oriented, computer‐assisted application. Verbal collaborative argumentation was recorded and the students' post essays were collected. A random effects analysis of variance (ANOVA) was conducted and a significant difference in science knowledge about alternative energies between conditions was observed. A multivariate analysis of variance (MANOVA) was conducted and there was a significant difference in counterargument and rebuttal skills between conditions. A qualitative analysis was conducted to examine how the graph‐oriented, computer‐assisted application supported students' development of argumentation skills and affected the quality of collaborative argumentation. The difference in argumentation structure and quality of argumentation between conditions might explain a difference in science knowledge as well counterargument and rebuttal skills (argumentation) between both conditions. This study concluded that a project‐based learning environment incorporating a graph‐oriented, computer‐assisted application was effective in improving students' science knowledge and developing their scientific argumentation skills.     

基于知识图嵌入的协同过滤推荐算法

利用知识图谱进行推荐的一个巨大挑战在于如何获取项目的结构化知识并对其进行语义特征提取.针对这一问题,提出了一种基于知识图嵌入的协同过滤推荐算法(KGECF).首先从Freebase知识图谱中提取与项目相关的知识信息,并与历史交互项目进行链接构建子知识库;然后通过基于TransR的Xavier-TransR方法得到子知识库中实体、关系表征;设计一种端到端的联合学习模型,将结构化信息与历史偏好信息嵌入到统一的向量空间中;最后利用协同过滤方法进一步计算这些向量并生成精确的推荐列表.在MovieLens-1 M和Amazon-book两个公开数据集上的实验表明,该算法在推荐准确率、召回率、F1值和NDCG四个指标上均优于基线方法,能够集成大规模的结构化和非结构化数据,同时获得高精度的推荐结果.     

Knowledge exchange in the shrines of knowledge: The “how’s” and “where’s” of knowledge sharing processes

Academic conferences are places of situated learning dedicated to the exchange of knowledge. Knowledge is exchanged between colleagues who are looking to enhance their future research by taking part in several formal and informal settings (lectures, discussions and social events). We studied the processes of knowledge sharing and the influence of the use of IT at the International Conference of Information Systems (ICIS2007) held in Montréal. We describe the categories of knowledge content shared at the conference. Two forms of knowledge sharing were analyzed: formal, guided, planned knowledge sharing in lectures or discussions, and informal knowledge exchange during social events. Data were collected from 274 participants at the conference. The intensity of knowledge sharing in the formal settings was higher compared to the informal settings and was perceived as contributing to future research and to the creation of social relationships. In contrast, informal knowledge sharing contributed mainly to job enhancement and to the initiation of meetings. The discussion centers on planning and evaluating conferences in terms of seeking, creating and sustaining knowledge sharing.     

Collaborative technologies in knowledge telework: an exploratory study

Abstract.  Knowledge workers in distributed work environments require substantial communication with colleagues and supervisors to perform their work activities, and collaborative technologies, like groupware, continue to improve the potential for such communication. This study investigates how an improvement in collaborative technology among a group of knowledge teleworkers impacts their communication patterns. The study focuses on one communication-based work process: knowledge sharing. The research involves a 6-month exploratory longitudinal case study of a group of teleworkers where a new groupware technology was implemented. The results indicate that while there are fewer instances of communication among group members after the technology is implemented, communication becomes more centralized around the district manager. These results suggest that increased collaborative technologies result in an adjustment between explicit and tacit knowledge sharing, as the availability of a centralized and updateable database reduces workgroup communications. However, consistent with structuration theory, telework group members do use communication technologies to address their most apparent needs and concerns. Other potential explanations and implications of these findings are discussed.     

Integrating computer‐supported collaborative learning into the classroom: the anatomy of a failure

We present an analysis of a longitudinal case study whose aim was to understand the processes of integration of a face‐to‐face and networked collaborative learning technology and pedagogy into a secondary school history‐geography classroom. Students carried out a sequence of argumentative tasks relating to sustainable development, including argument generation, sharing and elaboration, debate using a computer‐mediated communication, and organization of arguments in a shared diagram. Students' interactions and diagrams were analysed in terms of degree and quality of argumentativity, as well as catachresis (‘getting round’ the software to perform a non‐prescribed task). Results run counter to positive systems of ideas and values concerning collaborative learning and its technological mediation in that the scenario did not meet its pedagogical aims, having to be abandoned before its planned end. We discuss possible explanations for this ‘failure story’ in terms of the articulation between everyday, technology‐related and educational discourse genres, with their associated social milieux, as well as the social structure of the classroom. The relevance of these aspects for future attempts to integrate such technologies is discussed. In conclusion, we discuss a vision of learning that takes into account students who do not accept to play the educational game.     

How to foster frontline employee knowledge sharing within service‐oriented enterprises: Empirical evidence from China

Based on the context of Chinese workplace, the present research aims to explore the combined effects of proactive personality, supervisor–subordinate guanxi (s–s guanxi), and leaders’ innovation expectations on the knowledge sharing of frontline employees (FLEs). Questionnaire data from a sample of 301 FLEs within service‐oriented enterprises in China were used in this study. The results show that proactive personality and leaders’ innovation expectations are both positively related to employees’ psychological empowerment and knowledge sharing, and s–s guanxi significantly impacts psychological empowerment, but has a nonsignificant effect on knowledge sharing. This study expands the understanding of FLEs’ knowledge sharing behavior and enriches our understanding of the guanxi construction process during the interaction between supervisors and subordinates.     

基于不确定知识的粒子群优化算法

针对标准粒子群优化算法（PSO）速度更新方程存在随机参数,使得粒予扶取知识存在不完备性的问题,将不确定知识引入PSO算法中,并对个体知识、群体知识和不确定知识随机参数进行了归一化,保证算法在每一步演化中都能获得完备知识．理论分析给出了PSO—UK算法局部收敛参数条件,并证明了其具有全局优化性能．经典测试函数实验表明,所提出的PSO－UK算法具有全局搜索能力,且局部收敛精度明显优于PSO算法．     

Exploring students' learning effectiveness and attitude in Group Scribbles‐supported collaborative reading activities: a study in the primary classroom

Improving students' reading comprehension is of significance. In this study, collaborative learning supported by Group Scribbles (GS), a networked technology, was integrated into a primary reading class. Forty‐seven 10‐year‐old students from two 4th grade classes participated in the study. Experimental and control groups were established to investigate the effectiveness of GS‐supported collaborative learning in enhancing students' reading comprehension. The results affirmed the effectiveness of the intervention designed. In the experiment group, students' learning attitudes, motivation and interest were enhanced as well. Further analyses were done to probe students' interaction processes in the networked collaborative classroom and different collaboration patterns and behaviours were identified. Based on the findings obtained, implications for future learning design to empower L1 learning were elaborated.     

IT‐mediated social interactions and knowledge sharing: Role of competence‐based trust and background heterogeneity

In the knowledge‐based economy, organizational success is dependent on how effectively organizational employees share information. Many studies have investigated how different types of communication activities and communications media influence knowledge sharing. We contribute to this literature by examining increasingly prevalent yet understudied IT‐mediated social interactions and their effects on knowledge sharing among employees in comparison to face‐to‐face social connections. By integrating the literature on knowledge sharing, social networks, and information systems, we theorize the ability of IT‐mediated social interaction to (1) afford interactions between individuals with heterogeneous backgrounds and (2) facilitate frequent IT‐mediated social interactions that are high in competence‐based trust—both supporting effective sharing of knowledge. Through a social network analysis of the employees in a high‐tech organization, this study finds that IT‐mediated frequent social interactions are the most effective in promoting knowledge sharing.     

Collaborative concept mapping activities in a classroom scenario

The aim of this study is to test collaborative concept mapping activities using computers in a classroom scenario and to evaluate the possibilities that Elkar-CM offers for collaboratively learning non-technical topics. Elkar-CM is a multi-lingual and multi-media software program designed for drawing concept maps (CMs) collaboratively. Concept mapping is a widely accepted technique that promotes meaningful learning. Graphically representing concepts of the learning domain and relationships between them helps students integrate new knowledge into their current cognitive structure. This study was carried out with Social Education degree students at the University of the Basque Country (UPV/EHU). The experiment included two learning activities. First, all students collaboratively constructed in the classroom a CM on the subject of Moral Development. Second, students were organised into groups to complete the CM generated in the first part.     

Effects of online teaching presence on students' interactions and collaborative knowledge construction

This study analysed the instructors' teaching presence of three courses conducted by an instructor to explore the effects of the instructors' online teaching presence on students' interactions and collaborative knowledge constructions. Content analysis, social network analysis, and lag sequential analysis were used to explore the mechanism of teaching presence on students' interactions and collaborative knowledge construction. Results demonstrate that the design and organization, as well as facilitating discourse, can facilitate students' interaction, reduce the number of peripheral students, and facilitate students' collaborative knowledge construction, especially in the knowledge sharing, discovery, discussion, and application, whereas direct instruction has positive effects on teachers' centrality and negative effects on knowledge negotiation and testing. The result can give the instructors some guidance on online teaching practices.