"Now the African reigns supreme": the rise of African boxing on the Witwatersrand, 1924-1959     

Fleming T 《国际体育史杂志》2011,28(1):47-62

This essay explores the growth of boxing among the African populations on the Witwatersrand region of South Africa between 1924 and 1959. It details how the sport's jump in popularity with Africans paralleled migration to Johannesburg. Africans increasingly saw boxing as an activity and skill conducive with survival in this new environment, and thus the sport grew in popularity, stature, and skill-level amongst this emergent urban population. The essay further explores the various ways that the sport was disseminated and popularized during the era, thus detailing how the sport reached both the African masses and petit-bourgeois educated elite. As their presence in Johannesburg became more and more permanent, boxing came to encompass various meanings and ideals, such as notions of discipline, independence and civility, to these urban populations.  相似文献   

Correlation between grade point averages and student evaluation of teaching scores: taking a closer look     

Tyler J. Griffin  Kenneth Plummer  Devynne Barret 《Assessment & Evaluation in Higher Education》2014,39(3):339-348

One of the most contentious potential sources of bias is whether instructors who give higher grades receive higher ratings from students. We examined the grade point averages (GPAs) and student ratings across 2073 general education religion courses at a large private university. A moderate correlation was found between GPAs and student evaluations of teaching (SETs); however, this global correlation did not hold true for individual teachers and courses. In fact, there was a large variance in the correlations between GPAs and SETs, including some teachers with a negative correlation and a large variance between courses.  相似文献   

The Value of Performance in Physical Education Teacher Education     

Tyler G. Johnson 《Quest (Human Kinetics)》2013,65(4):485-497

It is widely accepted that doping in sports is, by definition, cheating. If we allow that cheating is advantage-seeking behavior utilized by one party in an agreement-defined activity that disallows that behavior, then taking drugs when others do not is cheating. The focus of this definition is on the intentions and purpose of the actor, which is primarily about advantage seeking. This article will argue that the effect of anabolic steroid addiction on the volition of the actor caeteris paribus invalidates the adequacy of cheating to describe this behavior.  相似文献   

Why I do not believe in the cost-disease     

Cowen  Tyler 《Journal of Cultural Economics》1996,20(3):207-214

Journal of Cultural Economics -  相似文献   

The Role of Mediators in the Development of Longitudinal Mathematics Achievement Associations          下载免费PDF全文

Tyler W. Watts  Greg J. Duncan  Meichu Chen  Amy Claessens  Pamela E. Davis‐Kean  Kathryn Duckworth  Mimi Engel  Robert Siegler  Maria I. Susperreguy 《Child development》2015,86(6):1892-1907

Despite research demonstrating a strong association between early and later mathematics achievement, few studies have investigated mediators of this association. Using longitudinal data (n = 1,362), this study tested the extent to which mathematics self‐concepts, school placement, executive functioning, and proficiency in fractions and division account for the association between mathematics achievement in first grade and at age 15. As hypothesized, a strong longitudinal association between first‐grade and adolescent mathematics achievement was present (β = .36) even after controlling for a host of background characteristics, including cognitive skills and reading ability. The mediators accounted for 39% of this association, with mathematics self‐concept, gifted and talented placement, and knowledge of fractions and division serving as significant mediators.  相似文献   

Three dimensional passivated-electrode insulator-based dielectrophoresis     

Diana Nakidde  Phillip Zellner  Mohammad Mehdi Alemi  Tyler Shake  Yahya Hosseini  Maria V. Riquelme  Amy Pruden  Masoud Agah 《Biomicrofluidics》2015,9(1)

In this study, a 3D passivated-electrode, insulator-based dielectrophoresis microchip (3D πDEP) is presented. This technology combines the benefits of electrode-based DEP, insulator-based DEP, and three dimensional insulating features with the goal of improving trapping efficiency of biological species at low applied signals and fostering wide frequency range operation of the microfluidic device. The 3D πDEP chips were fabricated by making 3D structures in silicon using reactive ion etching. The reusable electrodes are deposited on second glass substrate and then aligned to the microfluidic channel to capacitively couple the electric signal through a 100 μm glass slide. The 3D insulating structures generate high electric field gradients, which ultimately increases the DEP force. To demonstrate the capabilities of 3D πDEP, Staphylococcus aureus was trapped from water samples under varied electrical environments. Trapping efficiencies of 100% were obtained at flow rates as high as 350 μl/h and 70% at flow rates as high as 750 μl/h. Additionally, for live bacteria samples, 100% trapping was demonstrated over a wide frequency range from 50 to 400 kHz with an amplitude applied signal of 200 Vpp. 20% trapping of bacteria was observed at applied voltages as low as 50 Vpp. We demonstrate selective trapping of live and dead bacteria at frequencies ranging from 30 to 60 kHz at 400 Vpp with over 90% of the live bacteria trapped while most of the dead bacteria escape.  相似文献   

What Others Say     

Laura Terry Tyler 《Clearing house (Menasha, Wis.)》2013,86(9):559-560

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Why women succeed,and fail,in the arts   总被引：1，自引：1，他引：0  

Tyler Cowen 《Journal of Cultural Economics》1996,20(2):93-113

I examine and test hypotheses for the differential performance of men and women in the arts. I consider whether observed outcomes are best accounted for by differing innate and genetic endowments across the sexes, variations in training opportunities, maternal responsibilities, or discrimination in the marketplace. More generally, I also consider how social mechanisms can give rise to observed patterns of unequal achievement.  相似文献   

Teachers' Responses to the Ecosystemic Approach to Changing Chronic Problem Behaviour in Schools     

Ken Tyler  & Brynley David Jones 《Pastoral Care in Education》2002,20(2):30-39

This paper discusses the responses of a group of thirty-three primary and two secondary teachers to a series of sessions in which the ecosystemic approach to changing chronic problem behaviour in schools was explained and then tried out in practice. Three case examples are presented, as well as related discussions, which illustrate the approach. This study follows on from the work reported in Pastoral Care , December 1998.  相似文献   

Staying On: Poverty Warriors in West Virginia     

Marie Tyler McGraw 《Journal of American culture (Malden, Mass. : 2003)》1985,8(4):93-103

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