Baseball     

Rafael Escamilla  Glen Fleisig  Steven Barrentine  James Andrews  Claude Moorman III 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(2):213-228

The purpose of this study was to quantify and compare kinematic, temporal, and kinetic characteristics of American and Korean professional pitchers in order to investigate differences in pitching mechanics, performance, and injury risks among two different cultures and populations of baseball pitchers. Eleven American and eight Korean healthy professional baseball pitchers threw multiple fastball pitches off an indoor throwing mound positioned at regulation distance from home plate. A Motion Analysis three‐dimensional automatic digitizing system was used to collect 200 Hz video data from four electronically synchronized cameras. Twenty kinematic, six temporal, and 11 kinetic variables were analyzed at lead foot contact, during the arm cocking and arm acceleration phases, at ball release, and during the arm deceleration phase. A radar gun was used to quantify ball velocity. At lead foot contact, the American pitchers had significantly greater horizontal abduction of the throwing shoulder, while Korean pitchers exhibited significantly greater abduction and external rotation of the throwing shoulder. During arm cocking, the American pitchers displayed significantly greater maximum shoulder external rotation and maximum pelvis angular velocity. At the instant of ball release, the American pitchers had significantly greater forward trunk tilt and ball velocity and significantly less knee flexion, which help explain why the American pitchers had 10% greater ball velocity compared to the Korean pitchers. The American pitchers had significantly greater maximum shoulder internal rotation torque and maximum elbow varus torque during arm cocking, significantly greater elbow flexion torque during arm acceleration, and significantly greater shoulder and elbow proximal forces during arm deceleration. While greater shoulder and elbow forces and torques generated in the American pitchers helped generate greater ball velocity for the American group, these greater kinetics may predispose this group to a higher risk of shoulder and elbow injuries.  相似文献   

Kinematic and electromyographic comparisons between chin-ups and lat-pull down exercises     

Kenji Doma  Glen B. Deakin  Kevin F. Ness 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):302-313

The purpose of this study was to compare kinematics and muscle activity between chin-ups and lat-pull down exercises and between muscle groups during the two exercises. Normalized electromyography (EMG) of biceps brachii (BB), triceps brachii (TB), pectoralis major (PM), latissimus dorsi (LD), rectus abdominus (RA), and erector spinae (ES) and kinematics of back, shoulder, and seventh cervical vertebrae (C7) was analysed during chin-ups and lat-pull down exercises. Normalized EMG of BB and ES and kinematics of shoulder and C7 for chin-ups were greater than lat-pull down exercises during the concentric phase (p < 0.05). For the eccentric phase, RA during lat-pull down exercises was greater than chin-ups and the kinematics of C7 during chin-ups was greater than lat-pull down exercises (p < 0.05). For chin-ups, BB, LD, and ES were greater than PM during the concentric phase, whereas BB and LD were greater than TB, and LD was greater than RA during the eccentric phase (p < 0.05). For lat-pull down exercise, BB and LD were greater than PM, TB, and ES during the concentric phase, whereas LD was greater than PM, TB, and BB during the eccentric phase (p < 0.05). Subsequently, chin-ups appears to be a more functional exercise.  相似文献   

An ethic of care and educational practice     

Marcia McKenzie  Sean Blenkinsop 《Journal of Adventure Education & Outdoor Learning》2006,6(2):91-105

This article explicates the theoretical framework of an ethic of care and outlines recommendations for applying the framework to practice in adventure education, offering possibilities for re-imagining organizations as centrally concerned with compassion and care. Focusing on the work of Gilligan and Noddings, we suggest an understanding of an ethic of care that is contextual, ungendered, and inclusive of both the private and public spheres of life, and draw parallels between this ethic and the philosophies underlying Outward Bound specifically, and adventure education more generally. Finally, we outline possibilities for organizing educational curricula around centres of care for self, others, and the natural world, using Noddings' suggested curricular components of modeling, dialogue, practice, and confirmation.  相似文献   

Overview of innovations in organization for learning     

Glen Heathers 《Interchange》1972,3(2-3):47-68

Five approaches to organization for learning are reviewed: student grouping practices, nongrading, individualizing instruction, departmentalization in the elementary school, and cooperative teaching. The review relates these approaches to the accomplishment of eight basic instructional aims in the cognitive and affective areas. The critical review of each type of organizational plan considers problems of design, implementation, and evaluation. The general conclusion reached is that, while several of the approaches hold considerable promise for improving instruction, there usually are serious shortcomings in program design and implementation that prevent determining their potential contributions.

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Résumé Cinq voies d'accès à l'organisation de l'instruction sont passées en revue: techniques de groupement d'élèves, non-gradation, instruction individualisante, mise en départements en école élémentaire, et enseignement co-opératif. L'étude rapporte ces approches à l'accomplissement de huit buts fondamentaux d'instruction sur les plans cognitifs et affectifs. L'examen critique de chaque type de plan d'organisation considère les problèmes de dessin, d'exécution, et d'évaluation. La conclusion générale atteinte est, bien que plusieurs approches s'annoncent très bien pour améliorer l'instruction, on trouve presque toujours de sérieux défauts dans le dessin et l'exécution des plans d'études qui empêchent de définir leur apport potentiel.

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We hold these freedoms to be self-evident... [interview by Liz Else     

Boire RG 《New scientist (1971)》2004,182(2444):46-49

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Staff Improvement: A Dividend of Team Teaching     

Harvey L. Low  Glen Dey 《College Teaching》2013,61(4):337-341

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The empowerment dilemma: The dialectic of emancipation and control in staff/client interaction at shelters for battered women     

Mary Vaughn  Glen H. Stamp 《Communication Studies》2013,64(2):154-168

This study investigated the dialectic of emancipation and control in the relationship between staff and clients at shelters for battered women. Accounts from shelter workers indicated that the power structure of their relationship with clients is characterized by four properties: a circumstantial dichotomy, contrasting experiences, asymmetrical roles, and resource control. Additionally, the workers discussed four contradictory aspects of the shelter worker/shelter client relationship (their relationship with clients, the shelter environment, the clients' options, and the amount of time the client spends at the shelter) which reflected the existence of the dialectic of emancipation and control in their interaction with clients. Findings are discussed in terms of domestic shelters, shelter worker/shelter client relationships, and dialectical theory.  相似文献   

The Politics of Memory in Thailand and Australia: National identity,the media and the military     

Glen Lewis 《Media History》2013,19(1):77-88

History and Annotated Bibliography of American Religious Periodicals and Newspapers Established from 1730 through 1830 Gaylord P. Albaugh, 1994 Worcester, American Antiquarian Society pp. lxxxix, 1456; 2 vols

The End of News Roger Bird, 1997 Concord, Ontario, Irwin Publishing pp. 167

Commercium litterarium, 1600–1750. La communication dans la République des Lettres [Forms of communication in the Republic of Letters] Studies of the Pierre Bayle Institute, Nijmegan 25 Hans Bots &; Françcoise Waquet, eds, 1994 Maarssen, Academic Publishers Associated pp. xii, 333

Press Censorship in Elizabethan England Cyndia Susan Clegg, 1997 Cambridge, Cambridge University Press pp. xv, 296

Benjamin Collins and the Provincial Newspaper Trade in the Eighteenth Century C.Y. Ferdinand, 1997 Oxford, Clarendon Press pp. xiv, 258

Women Editing Modernism. ‘Little’ Magazines and Literary History Jayne E. Marek, 1995 Lexington, University Press of Kentucky pp. xii, 252

The Popular Magazine in Britain and the United States 1880–1960 David Reed, 1997 London, British Library pp. 287

The Bloody Circus: the ‘Daily Herald’ and the left Huw Richards, 1997 London, Pluto Press pp. x, 256

The Dent Uniform Edition of Dickens’ Journalism Vol. 2. ‘The Amusements of the People’ and Other Papers: reports, essays and reviews 1834–51 Michael Slater, ed., 1996 London, Dent pp. xxxviii, 438

Periodicals of Queen Victoria's Empire: an exploration J. Don Vann &; Rosemary T. Vanarsdel, eds, 1996 Toronto, University of Toronto Press pp. 371  相似文献   

Karasik–Udarnik: Shock-Worker of the Russian Book Arts     

Wojciech Zalewski  Glen Worthey 《Slavic & East European Information Resources》2013,14(4):257-267

ABSTRACT

The article shows the complex of information-bibliographic resources generated by Gosudarstvennaia publichnaia nauchno-tekhnicheskaia biblioteka Sibirskogo otdeleniia Rossiskoi akademii nauk (GPNTB SO RAS) [State Public Scientific-Technological Library of the Siberian Branch of the Russian Academy of Sciences], which is the largest research library in Asian Russia, to support historical investigations in Siberia and the Russian Far East. This complex consists of electronic bibliographic and full-text databases, bibliographic retrospective and current indexes of literature. A brief bibliometric analysis of History of Siberia and the Far East (topical, chronological, quantitative, type-species content of documents, etc.) is discussed.  相似文献   

ImaginOn,The First Twenty‐First Century Public Library Building in the U.S.     

Glen E. Holt 《Public Library Quarterly》2013,32(2):174-191

This article presents a portrait of ImaginOn, a combined children's library and theater building in Charlotte, NC. Unlike so many modern library buildings intended primarily as warehouses for materials or as civic icons, this structure is designed to encourage visitors to experience the joy to be found in stories of all kinds. The author conveys the excitement of ImaginOn and, using photographs, highlights the principal features of the structure.  相似文献