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Research suggests that undergraduate students learn more from lab experiences that involve longer-term projects. We have developed a one-semester laboratory sequence aimed at sophomore-level undergraduates. In designing this curriculum, we focused on several educational objectives: 1) giving students a feel for the scientific research process, 2) introducing them to commonly used lab techniques, and 3) building skills in both data analysis and scientific writing. Over the course of the semester, students carry out two project-based lab experiences and write two substantial lab reports modeled on primary literature. Student assessment data indicate that this lab curriculum achieved these objectives. This article describes the first of these projects, which uses the biflagellate alga Chlamydomonas reinhardtii to introduce students to the study of flagellar motility, protein synthesis, microtubule polymerization, organelle assembly, and protein isolation and characterization. 相似文献
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Currently, all elite high jumpers use the Fosbury Flop technique with a curved approach. This suggests that the curved approach presents some clear advantage, although there is no general agreement upon the mechanism or the mechanics. This study aimed to determine the characteristics of the approach curve and to investigate how it contributes to the generation of somersault rotation. A simple theoretical model was used to demonstrate that a tightening approach curve would change the inward lean towards the centre of the curve into outwards lean. Three-dimensional video analysis was used to record the performances of two elite male high jumpers in competition. It was found that in each case the radius of the approach curve and the inward lean angle both decreased towards the end of the approach. The amount of outward lean angular velocity generated was shown to be a major proportion of the required somersault angular velocity for a jump. It was concluded that the main advantage of a curved approach was that it resulted in the generation of somersault velocity providing the curve tightened towards the end of the approach. 相似文献
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A sample of 341 5 (1/2) -year-old children participating in an ongoing longitudinal study was the focus of a study on the relation between cardiac vagal regulation and peer status. To assess cardiac vagal regulation, resting measures of respiratory sinus arrhythmia (RSA) and RSA change (suppression) to 3 cognitively and emotionally challenging tasks were derived. Results indicated that vagal regulation was positively associated with peer status. In addition, mediational analyses revealed that the relation between vagal regulation and peer status was mediated through better social skills for girls and better social skills and fewer behavior problems for boys. These findings are discussed in terms of the role of vagal regulation in the facilitation of children's positive social behavior. 相似文献
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Physically maltreated children display a range of serious psychological problems. Despite the availability of effective treatment of similar problems in other populations of children, direct psychological treatment of abused children has rarely been reported. It is argued that such direct treatment, while constituting only a "partial solution" to the problem of child abuse, needs to be addressed through research and application. 相似文献
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Tatjana Lorković Graziano Krätli Carolyn Caizzi 《Slavic & East European Information Resources》2013,14(2-3):180-189
The article briefly describes the Slavic collection created by Joel Sumner Smith, which became the basis of Yale University Library's Slavic, East European, and Central Asian Collection. It then discusses preparation for digitizing it and the processes involved in creating this digital collection, as well as some of the problems encountered. 相似文献
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Paulo A. Graziano Leanna R. Garb Rosmary Ros Katie Hart Alexis Garcia 《Early education and development》2016,27(5):573-589
Research Findings: The objective of this study was to examine the student–teacher relationship as a potential moderator of the link between executive functioning (EF) and children’s early school readiness among a clinical sample of preschoolers with externalizing behavior problems (EBP). Participants for the study included 139 preschool children (75.54% boys, M age = 5.01 years, 84.94% Hispanic/Latino) with at-risk or clinically elevated levels of EBP. The student–teacher relationship was assessed using the Student–Teacher Relationship Scale. School readiness data were composed of standardized achievement test scores and teacher reports of kindergarten readiness. EF was measured via parent and teacher reports along with standardized measures of EF, including the Head–Toes–Knees–Shoulders task and 4 standardized subtests from the Automated Working Memory Assessment. Poorer student–teacher relationship quality was predictive of lower teacher-reported kindergarten readiness and higher academic impairment. Main effects were qualified by an interaction between EF and student–teacher relationship quality such that worse EF (parent/teacher reports and standardized performance) was only associated with lower teacher-rated kindergarten readiness for children with poorer student–teacher relationship quality. Practice or Policy: EF appears to be an important predictor of school readiness for preschool children with EBP, particularly for children experiencing poorer student–teacher relationships. 相似文献