Aponeurosis behaviour during muscular contraction: A narrative review     

Brent James Raiteri 《European Journal of Sport Science》2018,18(8):1128-1138

There is an abundance of evidence that suggests elastic tendons can enhance both animal and human muscle performance. However, in many terrestrial animals, including humans, a large proportion of the elastic tissue within the muscle-tendon unit is located within the muscle. This continuous elastic sheet, which provides muscle fibre attachment, is known as the aponeurosis. The aponeurosis has a much more complicated shape than the free tendon and it undergoes a more complicated loading regime during contraction, due to its relationship with the bulging muscle fibres, which remain isovolumetric during force production. Muscle contraction may dynamically modulate the stiffness of the aponeurosis at the same active versus passive force, by increasing the intramuscular pressure and transverse forces within the muscle, which may stretch the aponeurosis in width and subsequently reduce its longitudinal strain. Some evidence also suggests that the aponeurosis mechanical properties may be affected by muscle length, which appears to reduce the fascicle strains for a given muscle force at longer muscle lengths. This narrative review outlines the animal and human studies that have investigated aponeurosis behaviour during contraction and discusses how an elastic sheet with a variable stiffness under activation might be beneficial for muscle performance. While it is clear that our understanding of the role of aponeurosis is lacking, it is hoped that further work will attempt to determine how this tissue contributes to power amplification and elastic energy savings during locomotion and potentially uncover how aponeurosis behaviour contributes to injury risk.  相似文献   

Basic Irony: Examining the Foundations of School Mathematics With Preservice Teachers     

Brent Davis 《Journal of Mathematics Teacher Education》1999,2(1):25-48

This article reports on an inquiry into what tends to be taken for granted with regard to the teaching and learning of mathematics. The inquiry, undertaken in the context of a course on methods for mathematics teaching, was developed around an examination of the mathematical notions that infuse conventional theories of cognition and that permeate the structures and practices of school mathematics. In particular, concepts drawn from or aligned with Euclidean geometry were examined. Specifically, alternatives drawn from fractal geometry were explored. The importance of interrogating the often-transparent figurative underpinnings of our thinking about thinking is highlighted.  相似文献   

Failure is not an option: Entrepreneurship and the existential crisis of internationalization in the U.S.     

Chris R. Glass  Natalie I. Cruz 《Higher Education Quarterly》2023,77(2):283-297

Internationalization has become intertwined with efforts for institutions to compensate for declines in public funding with the development of new revenue streams. The purpose of this study is to understand the social construction of entrepreneurship in internationalization in the United States as well as explore the multiple meanings of entrepreneurship and its contradictions in discourse among senior international officers. The findings discuss and explore competing views, tensions and ethical complexities of the ‘new entrepreneurism’ increasingly common in internationalization, which blends creative problem-solving with pressures for revenue generation. The findings of this study illustrate that as the world faces genuine existential crises that threaten the continued existence of our species on the planet, internationalization is in the midst of an identity crisis. The drift towards privatization is proving to be increasingly unsustainable and an entirely insufficient response to the existential threats that face the world.  相似文献   

A critique of how technology adoption models are utilized     

Brent Wilson  Jackie Dobrovolny  May Lowry 《Performance Improvement》1999,38(5):24-29

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