Achievement Motivation and Performance Among Second-Grade Boys and Girls     

Donna Mitchell Schell  Joseph Veroff  Robert E. Schell 《Journal of Experimental Education》2013,81(4):66-73

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Biodeterioration of Incralac used for the protection of bronze monuments   总被引：2，自引：0，他引：2  

Christopher J. McNamara  Margaret Breuker  Marie Helms  Thomas D. Perry  Ralph Mitchell   《Journal of Cultural Heritage》2004,5(4):361-364

Outdoor bronze sculptures are highly susceptible to corrosion in many environments and organic coatings are widely used for their protection. The purpose of this study was to determine the susceptibility of the commonly used coating Incralac to biodeterioration by microorganisms. A yeast was isolated from a bronze statue treated with Incralac and its ability to degrade Incralac was determined using growth curves, scanning electron microscopy (SEM), and electrochemical impedance spectroscopy (EIS). The organism grew slowly on Incralac in liquid culture, but SEM images demonstrated its ability to adhere to Incralac coated metal. Additionally, the yeast caused a rapid drop in the low frequency impedance of Incralac coated metal that was not observed under sterile conditions, indicating that the organism accelerated deterioration of the coating. The potential for microbial growth to accelerate deterioration of Incralac should be considered when developing a maintenance strategy for the protection of outdoor metal monuments.  相似文献   

The Assessment Skills and Knowledge Standards: Professionalizing the work of assessing student learning and development     

Gavin W. Henning  Alice A. Mitchell  Peggy L. Maki 《About Campus》2008,13(4):11-17

A new set of standards to guide professional development in assessment among student affairs professionals and faculty members is poised to revolutionize how educators learn to conduct this essential work.  相似文献   

Book Review Essay     

Coral Mitchell 《Education and Information Technologies》2003,8(2):217-221

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Student & tutor consensus: a partnership in assessment for learning     

James Thompson  Don Houston  Kathryn Dansie  Timothy Rayner  Timothy Pointon  Simon Pope 《Assessment & Evaluation in Higher Education》2017,42(6):942-952

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.  相似文献   

Quenching of mercury resonance radiation and its relation to reactions sensitized by excited mercury atoms     

Allan C.G. Mitchell 《Journal of The Franklin Institute》1928,206(6):817-825

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Robust estimator design with an emphasis balance between performance and robustness     

Hyeon-Cheol Lee  Don R. Halverson 《Journal of The Franklin Institute》2007,344(7):954-968

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.  相似文献   

Engaging Undergraduates in Science Research: Not Just About Faculty Willingness     

Eagan MK  Sharkness J  Hurtado S  Mosqueda CM  Chang MJ 《Research in higher education》2011,52(2):151-177

Despite the many benefits of involving undergraduates in research and the growing number of undergraduate research programs, few scholars have investigated the factors that affect faculty members’ decisions to involve undergraduates in their research projects. We investigated the individual factors and institutional contexts that predict faculty members’ likelihood of engaging undergraduates in their research project(s). Using data from the Higher Education Research Institute’s 2007–2008 Faculty Survey, we employ hierarchical generalized linear modeling to analyze data from 4,832 science, technology, engineering, and mathematics (STEM) faculty across 194 institutions to examine how organizational citizenship behavior theory and social exchange theory relate to mentoring students in research. Key findings show that faculty who work in the life sciences and those who receive government funding for their research are more likely to involve undergraduates in their research project(s). In addition, faculty at liberal arts or historically Black colleges are significantly more likely to involve undergraduate students in research. Implications for advancing undergraduate research opportunities are discussed.  相似文献   

姜黄素类铂（Ⅱ）配合物的合成及其光学性质     

周双生  薛璇  姜渡  魏冬  田玉鹏 《安徽教育学院学报》2011,29(3):73-76

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。  相似文献   

Subject-specific computer simulation model for determining elbow loading in one-handed tennis backhand groundstrokes     

King MA  Glynn JA  Mitchell SR 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(4):391-406

A subject-specific angle-driven computer model of a tennis player, combined with a forward dynamics, equipment-specific computer model of tennis ball-racket impacts, was developed to determine the effect of ball-racket impacts on loading at the elbow for one-handed backhand groundstrokes. Matching subject-specific computer simulations of a typical topspin/slice one-handed backhand groundstroke performed by an elite tennis player were done with root mean square differences between performance and matching simulations of < 0.5 degrees over a 50 ms period starting from ball impact. Simulation results suggest that for similar ball-racket impact conditions, the difference in elbow loading for a topspin and slice one-handed backhand groundstroke is relatively small. In this study, the relatively small differences in elbow loading may be due to comparable angle-time histories at the wrist and elbow joints with the major kinematic differences occurring at the shoulder. Using a subject-specific angle-driven computer model combined with a forward dynamics, equipment-specific computer model of tennis ball-racket impacts allows peak internal loading, net impulse, and shock due to ball-racket impact to be calculated which would not otherwise be possible without impractical invasive techniques. This study provides a basis for further investigation of the factors that may increase elbow loading during tennis strokes.  相似文献