The radio influences speech     

Jon Hoffman 《Quarterly Journal of Speech》2013,99(2):219-223

PATRIOTIC GORE: STUDIES IN THE LITERATURE OF THE CIVIL WAR. By Edmund Wilson. New York: Oxford University Press, 1962; pp. 816. $9.50; paper $3.95.

THE TRIPLE THINKERS: TWELVE ESSAYS ON LITERARY SUBJECTS. By Edmund Wilson. New York: Oxford University Press, 1948; pp. x+270. $6.50.  相似文献   

The Meaning of Work/Life: A Corporate Ideology of Work/Life Balance     

Mary F. Hoffman  Renee L. Cowan 《Communication quarterly》2013,61(3):227-246

Organizations wield great power over the structure of contemporary life. Using the rhetorical method of cluster analysis, we investigated the construction of work/life issues on Web sites of companies on Fortune's 2004 list of “100 Best Companies to Work for.” By identifying key terms and the terms that clustered around them, we uncovered a corporate ideology of work/life: 1) work is the most important element of life; 2) life means family; 3) individuals are responsible for balance; and 4) organizations control work/life programs. We conclude that organizational work/life programs may increase, rather than decrease, the amount of control organizations exercise over personal life. We explore the implications of this finding as well as directions for future research.  相似文献   

Testing Injustice: Examining the Consequential Validity of edTPA     

Nadia Behizadeh  Adrian Neely 《Equity & Excellence in Education》2013,46(3-4):242-264

In this case study, we examine the consequential validity of using edTPA in a social justice-oriented, urban teacher preparation program. According to the developers of edTPA, a primary purpose is to support teacher candidate learning, yet our analysis suggests that edTPA does not support learning when used during student teaching. Our 16 participants, who are primarily teacher candidates of color and many first-generation college students, and who all passed edTPA, unanimously indicated that edTPA increased their mental and financial stress, which they linked to design elements including high stakes, standardization, and external scoring. Participants also critiqued the construct of teaching represented in edTPA, arguing that dispositions and a social justice orientation are missing and that edTPA is more about following procedures than supporting candidate learning. Moreover, edTPA encouraged inequitable practices, including focusing on high-achieving classes and selecting curricula based on scoring procedures instead of student need. Overall, our analysis indicates that there is not strong consequential validity evidence to support the use of edTPA as an assessment during student teaching, particularly in social justice-oriented programs, yet suggests edTPA could be a useful tool if stakes and proceduralism are reduced and scoring is conducted locally.  相似文献   

Who's the winner? Children's math learning in competitive and collaborative scenarios     

Lesenia R. Fish  Lindsey Hildebrand  Nadia Chernyak  Sara Cordes 《Child development》2023,94(5):1239-1258

Games are frequently used to promote math learning, yet the competitive and collaborative contexts introduced by games may exacerbate gender differences. In this study, 1st and 2nd grade children in the U.S. (ages 5–8; N = 274; 70% White, 15% Asian, 2% Black, 1% Native American, 14% mixed or other race; 17% Hispanic) played either a competitive, collaborative, or solo game to learn about a challenging novel math concept: proportion. Overall, both social contexts boosted perseverance and task attitudes. However, analyses revealed the competitive condition yielded gender differences in attention to proportion in the presence of competing cues, with older boys underperforming in the competition condition. Potential explanations for these findings, as well as implications for classroom math learning, are discussed.  相似文献   

National Information Infrastructures in Central and Eastern Europe: Perspectives from the Library Community     

Nadia Caidi 《The Information Society》2013,29(1):25-38

Information infrastructures (IIs) are a complex arrangement of people, technology, institutions, content, and conduits. Their development is shaped by the environment in which they evolve and the visions ascribed to them by the various actors. This article examines the assumptions, meanings, and definitions associated with IIs in four Central and Eastern European (CEE) countries: Czech Republic, Hungary, Poland, and Slovakia. In particular, it focuses on how one stakeholder group, the library community, frames the policy debates around IIs. In-depth interviews were conducted in 1999 with 49 library policymakers in 37 institutions. The data shed light on the respondents' collective story and visions and help us gain a better understanding of political and cultural differences in the development of IIs.  相似文献   

Urine dipstick analysis for identification of runners susceptible to acute kidney injury following an ultramarathon   总被引：1，自引：0，他引：1  

Martin D. Hoffman  Kristin J. Stuempfle  Kevin Fogard  Tamara Hew-Butler  James Winger  Robert H. Weiss 《Journal of sports sciences》2013,31(1):20-31

Abstract

This study examined whether urine dipstick testing might be useful to predict the development of acute kidney injury after an ultramarathon. Participants in the 2011 161-km Western States Endurance Run underwent post-race blood and urine dipstick analyses. Of the 310 race finishers, post-race urine dipstick testing was completed on 152 (49%) and post-race blood also was obtained from 150 of those runners. Based on “injury” and “risk” criteria for acute kidney injury of blood creatinine 2.0 and 1.5 times estimated baseline, respectively, 4% met the criteria for injury and an additional 29–30% met the criteria for risk of injury. Those meeting the injury criteria had higher creatine kinase concentrations (P < 0.001) than those not meeting the criteria. Urine dipstick tests that read positive for at least 1+ protein, 3+ blood, and specific gravity ≥ 1.025 predicted those meeting the injury criteria with sensitivity of 1.00 (95% confidence interval [CI] 0.54–1.00), specificity of 0.76 (95% CI 0.69–0.83), positive predictive value of 0.15 (95% CI 0.06–0.30), negative predictive value of 1.00 (95% CI 0.97–1.00), and likelihood ratio for a positive test of 4.2. We conclude that urine dipstick testing was successfully able to identify those individuals meeting injury criteria for acute kidney injury with excellent sensitivity and specificity.  相似文献   

A biomechanical comparison of dominant and non-dominant limbs during a side-step cutting task     

Christine D. Pollard  Marc F. Norcross  Sam T. Johnson  Amanda E. Stone  Eunwook Chang  Mark A. Hoffman 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(2):271-279

Abstract

Numerous studies have investigated anterior cruciate ligament (ACL) injury risk by examining gender differences in knee and hip biomechanics during a side-step cutting manoeuvre since it is known that ACL injury often occurs during such a task. Recent investigations have also examined lower extremity (LE) biomechanics during side-step cutting in individuals following ACL reconstruction (ACLR). Common research practice is to compare knee and hip biomechanics of the dominant limb between groups but this can add considerable complexity for clinicians and researchers. At this time, it is not known if there is a difference in LE biomechanics between the dominant and non-dominant limb during side-step cutting. Three-dimensional kinematics and kinetics were collected while 31 healthy participants performed five, side-step cutting manoeuvres with the dominant and non-dominant limbs. Knee and hip variables examined are those commonly investigated in ACL injury literature. There were no differences between limbs in all but one variable (knee internal rotation). These results demonstrate that healthy individuals exhibit little side-to-side differences in certain LE biomechanics when performing a side-step cutting manoeuvre. These findings can be utilised by clinicians when conducting dynamic evaluations of their ACLR patients and when developing injury prevention and rehabilitation programmes.  相似文献   

Differential effects of speed on two-dimensional foot strike pattern during barefoot and shod running in recreationally active men     

Ran Wang  Peng Cheng  Yang Hu  Jeffrey R. Stout  Jay R. Hoffman 《Sports biomechanics / International Society of Biomechanics in Sports》2020,19(4):438-451

ABSTRACT

The majority of barefoot running studies have not considered speed as an influential factor on foot strike pattern. The aim of this study was to investigate differences in foot strike pattern and spatiotemporal characteristics between barefoot and shod overground running at varying speeds. We first determined maximal running speed (Vm) over 50 m in 15 recreationally active men who self-reported as habitual rearfoot strikers. Participants then completed shod and barefoot running trials at different speeds equivalent to approximately 90%, 80%, 70% and 60% of Vm. Sagittal plane two-dimensional (2D) foot-ground contact angle, ankle plantar-dorsi flexion angle, contact time, flight time, step length and step rate variables for each trial were recorded. A significant interaction effect of running speed and footwear condition (p < 0.05) on foot-ground contact angle, ankle plantar-dorsi flexion angle and contact time was observed. There was a main effect of running speed (p < 0.01) on flight time, step length and step rate. There was a main effect of footwear condition on step length (p < 0.01). Participants were more inclined to plantarflex the ankle and contact the ground with the forefoot at higher percentages of Vm, especially when running barefoot.  相似文献   

Behavior of liquid plugs at bifurcations in a microfluidic tree network     

Nadia Vertti Quintero  Yu Song  Paul Manneville  Charles N. Baroud 《Biomicrofluidics》2012,6(3)

Flows in complex geometries, such as porous media or biological networks, often contain plugs of liquid flowing within air bubbles. These flows can be modeled in microfluidic devices in which the geometric complexity is well defined and controlled. We study the flow of wetting liquid plugs in a bifurcating network of micro-channels. In particular, we focus on the process by which the plugs divide as they pass each bifurcation. The key events are identified, corresponding to large modifications of the interface curvature, the formation of new interfaces, or the division of a single interface into two new ones. The timing of the different events and the amplitude of the curvature variations are analyzed in view of the design of an event-driven model of flow in branching micro-networks. They are found to collapse onto a master curve dictated by the network geometry.  相似文献   

Functional Outcomes of Patients with Sternectomy after Cardiothoracic Surgery: A Case Series     

Sonya L. Irons  Julie E. Hoffman  Shannon Elliott  Melanie Linnaus 《Cardiopulmonary Physical Therapy Journal》2012,23(4):5-11

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