面子、奖罚与知识共享的跨层次研究          下载免费PDF全文

段光  庞长伟  金辉 《科研管理》2018,39(8):161-168

基于激励的“挤出效应”，研究面子观对个体知识共享行为的影响，以及团队奖罚的跨层次调节效应。以74个知识团队为样本的跨层次实证分析表明：挣面子与知识共享正相关，而丢面子与知识共享负相关；团队奖罚会弱化挣面子对知识共享的促进作用，也会弱化丢面子对知识共享的抑制作用，表明团队奖罚对面子的作用存在挤出效应。最后，提出了相应的管理建议与对策。  相似文献   

Taking risks with a growth mindset: long-term influence of an elementary pre-service after school science practicum     

T. J. Cartwright  B. Hallar 《International Journal of Science Education》2018,40(3):348-370

In this study, we present the long-term influence of an after school science practicum associated with an elementary science methods course. The practicum or field experience could be considered a community-based service learning programme as it is situated both within and for the community. Study participants included eight third- and fifth-grade teachers who had participated in elementary science methods courses; four of these teachers participated in the after school teaching practicum while four participants experienced a more traditional observation-based elementary science practicum. All of these teachers were in their second or third year teaching which was 3–4 years after taking the methods course. Investigation methods included questionnaires, field observations and semi-structured, individual interviews. Teachers more regularly utilised reform-based teaching strategies and cited the after school teaching practicum as preparing them to use these strategies in their own classrooms. All teachers exhibited a growth mindset to some degree, but the after school practicum participants did demonstrate a wider use of reformed-based teaching strategies and a higher growth mindset. Elementary teachers perceive risk associated with these key aspects of instruction: (1) managing instruction and classroom management, (2) teaching science through guided inquiry, and (3) overcoming adoptions in other ‘mandated’ curriculum like math and reading.  相似文献   

On my honor: creating space for thinking and living Girl Scouts differently in (post)colonial Hawai‘i     

Patricia Espiritu Halagao  Julie Kaomea 《Gender and education》2018,30(7):866-881

Girl Scouts aims to foster leadership by encouraging girls to discover themselves, make connections, and take action to make the world better. This paper chronicles the five-year journey of eight professional mothers of color who sought to provide their daughters with a space to ‘think and live differently’ as Girl Scouts and young women of color in (post)colonial Hawai‘i. Through questionnaires and a semi-structured focus group interview, mothers reflect on their original intentions to create a ‘safe space’ for their daughters to engage with the politics of gender, race, and class and to rethink, review, and rework their identities. Mothers’ reflections reveal success in creating safe spaces for the critical analysis of gender, but comparatively less success in critical analyses of race and class – a phenomenon that the mothers suggest may have been complicated by (1) the enduring myth of Hawai‘i as a multicultural paradise, (2) Girl Scouts’ assimilationist history, and (3) the mothers’ own relatively privileged positions.  相似文献   

Optimising the blended learning environment: the Arab Open University experience     

Tahrir Hamdi  Mohammed Abu Qudais 《Open Learning》2018,33(1):46-62

This paper will offer some insights into possible ways to optimise the blended learning environment based on experience with this modality of teaching at Arab Open University/Jordan branch and also by reflecting upon the results of several meta-analytical studies, which have shown blended learning environments to be more effective than their face to face and online only counterparts. Three key elements will be presented as important ways for improving the blended learning environment: forging genuine collaborative partnerships between institutions in terms of the team-writing of Open and Distance Learning (ODL) material, adopting a more theoretically based instructional approach, such as the cognitive apprenticeship (CA) model, which emphasises making thinking visible and developing a comprehensive understanding of blended education in order to help students achieve their educational goals.  相似文献   

不同负荷运动训练对大鼠骨骼肌线粒体三羧酸循环的影响及其机制研究     

李洁  杨静  赵丽丽 《武汉体育学院学报》2019,53(5):88-94

目的：探讨不同负荷运动训练对大鼠骨骼肌线粒体三羧酸循环的影响及其机制。方法：将雄性Wistar大鼠50只随机均分为5组：安静对照组（C）、低负荷运动训练组（LT）、中等负荷运动训练组（MT）、高负荷运动训练组（HT）和极高负荷运动训练组（ST），每组10只。各运动组分别进行6周的跑台运动训练。训练方案结束后，取腓肠肌样本，提取线粒体，测定线粒体柠檬酸合成酶（CS）、异柠檬酸脱氢酶（ICD）和α-酮戊二酸脱氢酶（α-KGDHC）活性；线粒体Ga²⁺含量、胞浆NADH、NAD⁺、ATP和ADP含量，以及ICD mRNA转录水平。结果：（1）不同负荷运动训练组线粒体CS、ICD和α-KGDHC的活性均显著高于安静对照组（P < 0.01），且CS和ICD活性由高到低顺序均为：MT组 > HT组 > ST组 > LT组 > C组，α-KGDHC活性由高到低顺序为：HT组 > MT组 > ST组 > LT组 > C组。（2）不同负荷运动训练组线粒体Ca²⁺ 含量均显著高于安静对照组（P < 0.01），其含量由高到低顺序为：MT组 > HT组 > ST组 > LT组 > C组；胞浆NADH/NAD⁺和ATP/ADP的比值均显著低于安静对照组（P < 0.01），其比值由低到高顺序为：MT组 < ST组 < HT组 < LT组 < C组。（3）不同负荷运动训练组ICD mRNA转录水平均高于安静对照组（P < 0.01），其水平由高到低顺序为： MT组 > HT组 > ST组 > LT组 > C组。结论：低负荷、中等负荷、高负荷及极高负荷运动训练均可提高大鼠骨骼肌线粒体三羧酸循环功能，且中等负荷运动训练效果最佳。其机制与胞浆NADH/NAD⁺和ATP/ADP比值、线粒体摄钙能力及限速酶基因的表达有关。  相似文献   

The Non-Tested Years: Policy’s Impact on Early Childhood Curriculum     

Jennifer Gallo-Fox  Cara M. Cuccuini-Harmon 《The Educational forum》2018,82(4):475-490

Early childhood and elementary education emerged from a variety of knowledge and research bases. Tensions emerged as they were brought together in a unified public kindergarten through 12th-grade educational system. This review describes how standards and accountability policies have exacerbated tensions between early childhood and elementary curriculum and instructional approaches and impacted the voice and role of early childhood educators. We argue that this is a critical time for understanding and addressing these issues.  相似文献   

平行/重合D膜超势，Ooguri-Vafa不变量与类型II弦理论/F理论对偶     

蒋笑添  杨富中 《中国科学院大学学报》2019,36(5):590-597

利用类型Ⅱ弦理论/F理论对偶，第一次在平行和重合相区计算一个具体的双D膜系统的超势，并提取Ooguri-Vafa不变量。平行D膜相与重合D膜相间的相变也对应着D膜世界叶上规范理论规范对称性的提升U（1）×…×U（1）→U（n）。计算显示这两个相区的超势截然不同，并给出不同的Ooguri-Vafa不变量。这意味着相变的发生导致两个相区能谱结构的差异。  相似文献   

科技期刊融媒体出版传播模式探索——以《遥感学报》“中国遥感20年”纪念特刊为例     

边钊  韩向娣  闫珺 《中国科技期刊研究》2018,29(2):97-101

【目的】 探索传统媒体、网络媒体以及自媒体出版形成的融媒体矩阵在扩大科技期刊传播范围方面的具体举措，以提升科技期刊影响力。【方法】 以《遥感学报》“中国遥感20年”纪念特刊的宣传为例，通过融媒体手段创新出版和传播模式，总结实践经验，跟踪分析后期的宣传效果。【结果】 通过融媒体形成线上线下互联互通的传播模式，扩大了阅读群体的辐射范围及传播效应，增强期刊在业内的影响力。【结论】 融媒体技术是提升科技期刊影响力的有效途径。  相似文献   

Cooperative Governance of Successful Public Schooling: Successes,Frustrations and Challenges     

Erika Serfontein 《Africa Education Review》2018,15(4):67-83

In search of embodying values that underpin democracy at school level, the objectives of the article include exploring expectations generated by the constitutional dispensation (Constitution of the Republic of South Africa, 108/1996, section 41) and delineating those moulded by the South African Schools Act (84/1996, Preamble). While the latter formally signify a State-education-partnership, the intention for teachers, learners and parents to accept especially governance responsibilities towards school democracy prompted our focused three-way alliance between parent-teacher-learner parties for the purpose of this article. Our conceptual framework is informed by Permuth, Mawdsley and Silver (2015), who contend that the essentially new facet of moving towards integrating qualitative research with doing traditional legal research could expand legal reasoning and even complement it with empirical credibility. Authenticated by Adler (2015), the article therefore combines focusing on cooperative governance as an act to shape schooling in the traditional legal way (by asking what questions) with qualitative research features to inform us by also asking how and why questions. We chose a documentary design with a comparative angle; selected documentary resources; and took an exploratory approach to gain understanding and weigh the investigated documents by comparing and appraising primary and secondary sources. We also regarded whatever was embedded yet not recorded as similarly important to what was recorded and how a specific concept was extended (De Waal and Serfontein 2015). Reviewing relevant case law, we present an overview of cooperative school governance progress; a constitutional challenges-based intervention; continuous acceptance of responsibility and accountability; and successes, frustrations and challenges concerning the future pathway to successful schooling. Given the snowballing set of demands on public schools, the catch is for partners to know each other's strengths and weaknesses so that balanced contributions will cause governance towards quality education. The drastic parental governance and leadership role-change, with higher moral-social responsibility levels, calls for carefully designed conferences to guide parent-partners’ exercising the necessary discretion underpinned by critically considering the significance of serving society.  相似文献   

Examining the influence of grip type on wrist and club head kinematics during the golf swing: Benefits of a local co-ordinate system     

Howie J. Carson  Jim Richards  Bruno Mazuquin 《European Journal of Sport Science》2019,19(3):327-335

Wrist movements have been identified as an important factor in producing a successful golf swing, with their complex motion influencing both club head velocity and orientation. However, a detailed analysis of wrist angles is lacking in the literature. The purpose of this study was to determine kinematics across wrists and club head characteristics during the golf swing under weak, neutral and strong grip conditions. Twelve professional male golfers executed 24 shots using a driver under three grip conditions. A six degrees of freedom analysis of the hand with respect to the distal forearm was performed using a 10-camera three-dimensional motion capture system. Differences in joint angles were explored using repeated measures ANOVAs at key swing events (onset, top of backswing and impact), in addition club head velocity and clubface angle at impact were also explored. Main findings revealed significant differences in flexion/extension and internal/external rotation for both wrists at all swing events, whereas fewer significant interactions were found in ulnar/radial deviation across grips for both wrists at all events. Clubface angle only differed significantly between the weak and the strong and neural grips, presenting a more ‘open’ clubface to the intended hitting direction. This study is the first to explore tri-planar wrist movement and the effect of different grips, such analysis has implications for coaching knowledge and practice and should inform future research into different aspects of skill, technique analysis and may inform injury mechanisms/prevention.  相似文献