T cell receptor signalling in gamma delta cell development: strength isn't everything

Published version can be found here: http://www.cell.com/trends/immunology/abstract/S1471-4906%2811%2900153-0

Using FitnessGram to Measure the Impact of ‘Lost’ Physical Education During the COVID Years

Physical education can play a critical role in helping children establish a foundation for an active lifestyle. There is reason to believe the impact of COVID-19 eliminating compulsory physical education in the K-12 setting only exasperated the problem of increasingly physically unhealthy children in the United States. Much of what kinesiology and public-health scholars know about the fitness level of American youths are based on dated or retrospective data; FitnessGram has emerged as a viable option for revealing the present-day physical health of youth populations. There is clear potential for FitnessGram data to contribute to advancing knowledge about current levels of health-related fitness in youth. In this study, researchers using FitnessGram data from an independent K-12 school district in Texas, USA (ISD) investigated K-12 students’ fitness levels and patterns after the COVID-19 pandemic. Results indicate students suffered diminished cardiovascular fitness levels during COVID years (2020-2021), but not diminished strength and endurance or range of motion. Findings from FitnessGram data advocate for quality and compulsory physical education and movement/physical activity in school settings, as well as the adoption of Comprehensive School Physical Activity Promotion (CSPAP)

Is Teleology a Philosophical Dead-End?

The purpose of this paper is to answer the question, Is teleology a philosophical dead-end? in relation to Aristotle\u27s work and theories and teleology. I argue against the question, supporting Aristotle

Sport Education and Physical Activity: Recommendations for Maximizing the Model

There is a need for physical education to address two important concerns affecting American youth: the worsening social decline of communities and schools, and the increase of childhood obesity and sedentary related illnesses. This article explores solutions to the dual challenge of increasing students' moral and social development, and increasing students physical activity levels in physical education while teaching within the Sport Education Model

Deformation Potential Carrier-Phonon Scattering in Semiconducting Carbon Nanotube Transistors

Theoretical calculations of carrier transport in single-walled carbon nanotubes are compared with recent experiments. Carrier-phonon scattering is accounted for using the deformation potential approximation. Comparing with experiments, a deformation potential coupling constant of 14eV is determined for semiconducting carbon nanotubes. Theory is shown to closely predict the low-field mobility, on conductance, and on resistance of field-effect transistors as a function of induced nanotube charge density, diameter, and temperature. Results indicate that the device conductance is reduced as multiple subband channels conduct due to strong intersubband scattering. Comparison with experiment allows identification of the mean free path (Lm) in semiconducting carbon nanotubes. As the device turns on, Lm is found to increase significantly. When the device is in the on state, the mean free path (Lm-ON) varies linearly with tube diameter and inversely with temperature. Intersubband scattering is found to strongly decrease Lm-ON when a few subbands are occupied. When 3 subband channels are considered at room temperature, Lm-ON decreases from 570nm to 200nm for a 4nm diameter tube when intersubband scattering is included. Since the subband spacing increases with decreasing tube diameter, the effects of intersubband are reduced for smaller diameters.Comment: 11 pages, 6 figure

THE INDUSTRY HAS CHANGED, HAVE YOU? THE AGCO STORY

AGCO Corporation is a success story in the agricultural machinery sector. Utilizing marketing strategies of out-sourcing, cross-over selling, and a full line of products, AGCO markets its own way. In 7 years, AGCO has 18 brands sold through 7,000 dealerships in 140 countries. Acquisition and consolidation powered the growth of AGCO using nontraditional buyout financing. Herein lies its real success.Agribusiness, Industrial Organization,

Low-mass scalar production in γγ\gamma \gamma scattering

We estimate the I=0 scalar meson $\sigma/f_0(600)$ $\gamma\gamma$ widths, from $\pi\pi$ and $\gamma\gamma$ scattering data below 700 MeV using an improved analytic K-matrix model.Comment: 3 pages, 2 figures, Talk given at QCD 08 (Montpellier 7-12th july 2008

Cerebral Palsy: Enhancing Movement Opportunity with Help from the Care Team

Cerebral palsy is the most common motor disability in childhood. Cerebral palsy can significantly impact the amount of physical activity and individual obtains, and the scope and quality of the physical activity may be limited by cerebral palsy. High-quality physical education can integrate children with cerebral palsy into movement programing, as to enable children with cerebral palsy to achieve goals related to cognitive skills associated with exploring physical health, maintaining physical health, as well as affective values towards physical health, movement, play, and general wellbeing. This article provides a basic overview of the physical characteristics of cerebral palsy, as well as outlines ways the child’s educational care-team can work with physical educators and physical therapist to enhance movement skills and health behavior

Chiral two-loop pion-pion scattering parameters from crossing-symmetric constraints

Constraints on the parameters in the one- and two-loop pion-pion scattering amplitudes of standard chiral perturbation theory are obtained from explicitly crossing-symmetric sum rules. These constraints are based on a matching of the chiral amplitudes and the physical amplitudes at the symmetry point of the Mandelstam plane. The integrals over absorptive parts appearing in the sum rules are decomposed into crossing-symmetric low- and high-energy components and the chiral parameters are finally related to high-energy absorptive parts. A first application uses a simple model of these absorptive parts. The sensitivity of the results to the choice of the energy separating high and low energies is examined with care. Weak dependence on this energy is obtained as long as it stays below ~560 MeV. Reliable predictions are obtained for three two-loop parameters.Comment: 23 pages, 4 figures in .eps files, Latex (RevTex), our version of RevTex runs under Latex2.09, submitted to Phys. Rev. D,minor typographical corrections including the number at the end of the abstract, two sentences added at the end of Section 5 in answer to a referee's remar