Effect of time of day on perceived exertion at work rates above and below the ventilatory threshold

The effect of time of day on ratings of perceived exertion (RPE) at various intensities of cycling exercise, both below and above the ventilatory threshold, was studied in 32 subjects, 18 to 35 years of age. The ventilatory threshold occurred at the same (p greater than .05) mean (+/- SD) work rate in the morning (110.6 +/- 27.0 watts) and in the afternoon (111.9 +/- 23.9 watts) and was perceived as equally strenuous (p greater than .05) in the morning (RPE = 13.8 +/- 2.4) and in the afternoon (RPE = 13.6 +/- 2.8). At intensities below the ventilatory threshold, RPE was the same (p greater than .05) in the morning and in the afternoon; above the ventilatory threshold, RPE was lower (p less than .05) in the morning. We conclude that, during incremental submaximal cycling exercise above the ventilatory threshold, a particular work rate is perceived as less strenuous in the morning than in the afternoon. About 20% of this difference in RPE is explained by lower ventilatory demands in the morning.     

Using 21st century video prompting technology to facilitate the independence of individuals with intellectual and developmental disabilities

Barriers in acquiring, maintaining, and generalizing daily living skills are factors that contribute to discrepancies in independent living outcomes among transition age youth and young adults with intellectual and developmental disabilities (IDD). Acquisition and generalization of daily living skills empowers transition age youth and young adults with disabilities to meet their own needs with minimal reliance on others. Infusing the use of technology as a self‐prompting device facilitates the acquisition of tasks that may not be otherwise attainable. In this study, self‐directed video prompting on an iPad with the My Pictures Talk application was used to help young adults with IDD in a postsecondary program acquire daily living skills in a single subject, multiple probe across subjects design. The effects of the intervention on generalization to tasks that were one, two, and three components different were also assessed. Results demonstrated a functional relationship between the introduction of the intervention and improvement in skill performance.     

Student & tutor consensus: a partnership in assessment for learning

The mistakes made when attempting tasks often prove to be some of the most invaluable learning experiences. Despite this, outcome and results driven assessment formats largely penalise student performance errors or reward students who succeed by chance. The consequences of this paradigm are visible effects on student relationships with assessment. The student–tutor consensus approach to assessment was introduced to capture student learning achieved ‘from’ assessment to complement the measurement of performance outcomes. This approach parallels student and tutor judgement in a grade negotiation, affording the student an opportunity to share with their assessor what they have learned from the assessment activity. This student self-awareness was then considered alongside the conventional outcome-based score awarded by the tutor to generate a final grade for the assessed activity. Our study evaluated the perceptions of 90 undergraduate students enrolled in the bachelor of paramedic studies, who participated in this novel assessment approach as part of a final-year capstone topic. The results comprehensively indicated value for all aspects of the assessment approach, as well as a recognition that the skills will be useful in their future professional roles.     

Robust estimator design with an emphasis balance between performance and robustness

From a number of ML estimators (typically unbiased) of practical interest which include the variance for a Gaussian distribution, the standard deviation for a Laplace distribution, the variance for a Rayleigh distribution and a “spread parameter” for a Cauchy distribution, we design robust estimators according to an emphasis balance between normalized performance and normalized robustness. We measure performance with inverted MSE and robustness with a differential geometric approach.     

Adolescents' development of skills for agency in youth programs: learning to think strategically

This research examines how youth in arts and leadership programs develop skills for organizing actions over time to achieve goals. Ethnically diverse youth (ages 13-21) in 11 high-quality urban and rural programs were interviewed as they carried out projects. Qualitative analyses of 712 interviews with 108 youth yielded preliminary grounded theory about youth's development of strategic thinking, defined as use of dynamic systems reasoning to anticipate real-word scenarios and plan work. Strategic thinking appeared to develop through youth's creative engagement with tactical challenges in the work and feedback from the work's outcomes. Program advisors supported this development by giving youth control and by providing nondirective assistance when needed.     

姜黄素类铂（Ⅱ）配合物的合成及其光学性质

以乙醇为溶剂,用自制的姜黄素衍生物（L1~L2）和碘亚铂酸钾为原料,合成得到了两种姜黄素类铂（Ⅱ）配合物（A和B）,通过IR1、HNMR、MS和元素分析对目标化合物进行了结构表征。并对它们的紫外可见电子光谱、单、双光子荧光光谱和双光子吸收截面进行了初步地研究。     

Development and initial validation of the Psychological Characteristics of Developing Excellence Questionnaire

The development of talent is a complex process mediated by a host of psychological, social, physical, and environmental variables. Unfortunately, the multiple processes involved in talent development are frequently ignored by the systems and protocols employed in sport. Modern approaches to talent development are beginning to stress the initial possession, then subsequent development, of generic psychological characteristics (e.g. psychological characteristics of developing excellence; MacNamara, Button, & Collins, 2010a , 2010b ) as the best way to realize latent potential. Accordingly, this paper describes the development and initial validation of the Psychological Characteristics of Developing Excellence Questionnaire (PCDEQ). In the first phase, an initial list of 160 items was developed. A combination of expert panel reviews, cognitive interviews, and a pilot test was used to assess the relevance, representativeness, and validity of each item. Ninety-six items were retained following these steps. Exploratory factor analysis, with a sample of 363 athletes, revealed an interpretable 59-item, 6-factor solution with good internal consistency (0.870, 0.866, 0.847, 0.741, 0.749, and 0.701 respectively). The Psychological Characteristics of Developing Excellence Questionnaire would appear to hold promise as a useful tool to provide coaches and athletes with information about the psychological characteristics of developing excellence that are being properly addressed or neglected during different stages of development or in different contexts.     

The Effects of a Comprehensive Early Literacy Project on Preschoolers’ Language and Literacy Skills

The purpose of this study was to examine the effects of a federally funded early literacy project that aimed to promote the school readiness skills of preschool-age children from low income families. Through daily, explicit, and systematic instruction, the project targeted to improve preschoolers’ oral language skills, phonological awareness, print awareness, and alphabet knowledge that aligned with the existing curriculum of the local school district. Data were collected through multiple sources at the individual child level, classroom level, and from the family/home environment. Significant gains were found between pre- and post-tests in child outcomes, classroom environments, instructional practices, parent attitudes toward early literacy, and family involvement in literacy activities. Additionally, classroom organization was identified as a significant predictor for children’s receptive language skills. Limitations of the current study and implications for future research as well as instructional practices were discussed.     

Intergenerational learning practices—Digital leaders in schools

This paper explores the management and outcomes of a specific model of intergenerational learning, concerned with student digital leader support in a number of secondary schools in England. A local educational partnership set up a student digital leader project late in 2011, which aimed to develop a range of skills and outcomes for both the digital leaders themselves and for a potentially wider variety of personnel within the schools. Five schools were involved in the project. The student digital leaders shared their digital technology expertise with others with less developed skills, including teachers and managers in these schools. The study reported in this paper explored ways that the digital leader initiative was implemented, identifying and analysing outcomes and issues arising. Evidence from informants and from the analysis of benefits arising indicates that the student digital leader initiative led to a variety of positive outcomes. A key finding and conclusion is that this form of initiative has involved some students who tend not to be involved in other leadership or school-wide activities. The initiative enables these students to contribute to the community, rather than just receiving from it; students become active contributors to, as well as receivers from, the educational system.