轻稀土青霉素对油菜花粉管生长的影响

通过轻稀土、青霉素对油菜花粉萌发及花粉管生长的影响的研究,发现轻稀土、青霉素与硼酸一样,对油菜花粉管的生长有明显的促进作用。     

Accounting for young children’s competence in educational research: New perspectives on research ethics

Educational researchers working with young children face ethical issues when researching the talk and interactions of young children. Issues around the competence of children to participate in research pose challenges to educational researchers and to the young participants and their families, within what are seen as increasingly risky and regulated research environments. This paper examines some of these issues in light of recent sociological perspectives that account for children as competent practitioners of their social worlds. Drawing on research investigating the governance of the lives of young children in Australia, we examine the rights of children to be both seen and heard as competent research participants. These sociological directions afford opportunities to reconsider the ethical issues around research with young children. Such an approach breaks new ground in early childhood education research.     

Responding to a fiscal crisis: a data‐driven approach

The Division of Planning and Institutional Improvement (PAII) at Indiana University–Purdue University Indianapolis provides for the campus data for academic planning and management, assessment and evaluation services, and progress reports on mission‐critical goals. To respond to a forecast fiscal crisis and support long‐range planning for the Division, staff undertook a survey of deans and other key campus stakeholders to determine which of its services were best‐known and considered most useful for unit‐level planning and decision‐making, especially as these units faced the same projections of severe fiscal constraints. Findings indicated greater awareness and use of PAII data among deans than among other academic leaders and provided important insights into the kinds of data needed most for decision‐making. These outcomes will guide the Division’s future strategies for educating deans and other stakeholders on underused, but potentially useful, services and for selecting new services to offer.     

Maternal Support for Play and Language across Early Childhood

Patterns of development in language and play for full term and preterm children from 6 to 54 months and the effects of maternal parenting strategies (i.e., maintaining attentional focus, use of directiveness) were examined. Significant risk differences in the growth of both language and play were found. The high risk children were more likely to show delays in both these skills. Maintaining had a positive influence on children's skills, while directiveness had a largely negative influence, especially at older ages. The relation between growth in play and language was stronger for the high risk, preterm, when compared to the low risk and full term, children, but only during the infancy and toddler period. Given that play and language development is more likely to be delayed for preterm, high-risk children and the relation between the development of these skills is stronger for high risk preterm children, particularly early, it would be important to provide the parents and educators with information about play and language development. For example, communicating the need to be consistent in using some interactive behaviors (e.g., maintaining) as children develop while modifying other behaviors (e.g., directiveness) would be essential.     

Preparation and photocatalytic activity of BiOBr/TiO<Subscript>2</Subscript> heterojunction nanocomposites

An efficient visible-light-responsive BiOBr/TiO₂ heterojunction nanocomposite was fabricated successfully using in-situ depositing technique at room temperature by introducing BiOBr onto the surface of TiO₂ nanobelts pre-prepared by hydrothermal reaction and etched with H₂SO₄. The obtained particles were characterized by XRD, SEM, TEM, XPS, UV-Vis DRS and PL techniques. BiOBr/TiO₂ heterojunction nanocomposites with different mass ratios of m(BiOBr)/m(TiO₂) were discussed in order to get the best photocatalytic activity, and BiOBr/TiO₂-1.0 was proved to be the optimal mass ratio. BiOBr/TiO₂-1.0 exhibited excellent photocatalytic activity in the degradation of RhB compared with TiO₂ nanobelts, pure BiOBr and the mechanical mixture of TiO₂ nanobelts and BiOBr. At last, a possible mechanism of photocatalytic enhancement was proposed.     

教师教育:美国社区学院的新职能

美国正处于教师紧缺当中。为了满足初、中等教育教师需求,美国社区学院已拓展了教师教育这一新的职能。社区学院正在开展体现“2＋2”合作模式的教师教育方案,并制定了州级政策协调、州级基金计划与合作、新学位计划设计、文科辅助教学、文科学士学位教育、可选择性教师资格证书和获取鉴定资格等措施予以保障。     

Predicting course performance in freshman and sophomore physics courses: Women are more predictable than men

This study investigated the extent to which thinking skills and mathematical competency would predict the course performance of freshman and sophomore science majors enrolled in physics courses. Multiple-regression equations revealed that algebra and critical thinking skills were the best overall predictors across several physics courses. Although arithmetic skills, math anxiety, and primary mental abilities scores also correlated with performance, they were redundant with the algebra and critical thinking. The most surprising finding of the study was the differential validity by sex; predictor variables were successful in predicting course performance for women but not for men.     

Learntime and learning place-focused forward-oriented design for learning in technology-enhanced classrooms

This study reports on a teacher’s ongoing design activities in a fully online language course when the class was in progress. The aims were, firstly, to provide first-hand experience and insight into a teacher’s design work in a real-life, technology-enhanced learning (TEL) classroom; and secondly, to facilitate reflective analysis of the emerging design events. A hermeneutic phenomenological approach was adopted for data collection, and the analysis of data was further aided by the framework of forward-oriented design for learning (Goodyear & Dimitriadis, 2013), which considers educational design as a continuing and forward-looking practice including processes of orchestration, configuration, reflection and re-design. Fifteen design events were collected, which provided a snapshot of how and what design activities emerged from a complex, constantly evolving TEL classroom. The interpretation and analysis reveal insights related to various design processes. The findings highlight the forward-looking, ongoing, process-oriented and cyclical nature of TEL design.