2,358 research outputs found
Global Citizenship and the Ethical Challenges of ‘Sport for Development and Peace’
Recent years have seen increased recognition, promotion and institutionalization of the role of sport and physical activity amidst struggles for just and sustainable development on an international scale. This paper explores the ways in, and extent to, which global citizenship – the idea that humans are citizens of the world with global rights and responsibilities – underpins this institutionalization and popularity of Sport for Development and Peace (SDP). These connections are then used to put forth a series of critical and ethical complications regarding the mobilization of sport towards meeting international development goals. In particular, the paper argues that any progressive and ethical invocation of sport as a means of supporting sustainable development depends more on the ways in which global citizenship is interpreted and acted upon by SDP stakeholders than it does on the global popularity of sport as an entry into the field or context of international development
Integrated developmental model of life-support capabilities in wheat
The objective of this project was to develop a model for CO2, O2, H2O, and nitrogen use during the life cycle of wheat. Spreadsheets and accompanying graphs were developed to illustrate plant population reactions to environmental parameters established in the Controlled Ecological Life Support System (CELSS) program at Kennedy Space Center, Fl. The spreadsheets and graphs were produced using validated biomass production chamber (BPC) data from BWT931. Conditions of the BPC during the 83 day plant growth period were as follows: The BPC area is 27.8 m(exp 2), volume is 113 m(exp 3). Temperatures during the 83 day plant growth period ranged from 16.3 to 24.8 C during the light cycle (except for day 69, when the minimum and maximum temperatures were 7.7 C and 7.9 C, respectively) and 14.5 C and 23.6 C during the dark cycle (except for day 49, when the minimum and maximum temperatures were 11.1 C and 11.3 C, respectively). Relative humidity was 85 percent for the first seven days of plant growth, and 70 percent thereafter. The plant leaf canopy area was 10 m(exp 2). Presented is a list and explanation of each spreadsheet and accompanying graph(s), conditions under which the data were collected, and formulas used to obtain each result
Impact of Prevnar (PCV13) vaccine recommendations in pediatric and immunocompetent adults 65 years and older: What are the benefits and risks?
Background:
2000: PCV7 becomes the first FDA approved pneumococcal vaccine for pediatrics2010: PCV13 recommended in pediatrics 2014: PCV13 recommended in immunocompetent adults 65+ 2018: CDC looked at data since 2014 recommendation 2019: PCV13 now shared clinical decision-makin
The Use of an Experimental, Topical Foam to Enhance Skin Cooling and Sodium Retention
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Polymer translocation through a nanopore under an applied external field
We investigate the dynamics of polymer translocation through a nanopore under
an externally applied field using the 2D fluctuating bond model with
single-segment Monte Carlo moves. We concentrate on the influence of the field
strength , length of the chain , and length of the pore on forced
translocation. As our main result, we find a crossover scaling for the
translocation time with the chain length from for
relatively short polymers to for longer chains, where
is the Flory exponent. We demonstrate that this crossover is due to the
change in the dependence of the translocation velocity v on the chain length.
For relatively short chains , which crosses over to for long polymers. The reason for this is that with increasing
there is a high density of segments near the exit of the pore, which slows down
the translocation process due to slow relaxation of the chain. For the case of
a long nanopore for which , the radius of gyration along
the pore, is smaller than the pore length, we find no clear scaling of the
translocation time with the chain length. For large , however, the
asymptotic scaling is recovered. In this regime, is almost independent of . We have previously found that for a polymer,
which is initially placed in the middle of the pore, there is a minimum in the
escape time for . We show here that this minimum
persists for a weak fields such that is less than some critical value,
but vanishes for large values of .Comment: 25 Pages, 10 figures. Submitted to J. Chem. Phys. J. Chem. Phys. 124,
in press (2006
Exact solution of a linear molecular motor model driven by two-step fluctuations and subject to protein friction
We investigate by analytical means the stochastic equations of motion of a
linear molecular motor model based on the concept of protein friction. Solving
the coupled Langevin equations originally proposed by Mogilner et al. (A.
Mogilner et al., Phys. Lett. {\bf 237}, 297 (1998)), and averaging over both
the two-step internal conformational fluctuations and the thermal noise, we
present explicit, analytical expressions for the average motion and the
velocity-force relationship. Our results allow for a direct interpretation of
details of this motor model which are not readily accessible from numerical
solutions. In particular, we find that the model is able to predict
physiologically reasonable values for the load-free motor velocity and the
motor mobility.Comment: 12 pages revtex, 6 eps-figure
Building a Model of Collaboration Between Historically Black and Historically White Universities
Despite increases over the last two decades in the number of degrees awarded to students from underrepresented groups in science, technology, engineering, and mathematics (STEM) disciplines, enhancing diversity in these disciplines remains a challenge. This article describes a strategic approach to this challenge—the development of a collaborative partnership between two universities: the historically Black Elizabeth City State University and the historically White University of New Hampshire. The partnership, a type of learning organization built on three mutually agreed upon principles, strives to enhance opportunities for underrepresented students to pursue careers in the STEM disciplines. This article further describes six promising practices that framed the partnership, which resulted in the submission of nine proposals to federal agencies and the funding of four grants that led to the implementation, research, learning, and evaluation that followed
Polymer translocation through a nanopore: a two-dimensional Monte Carlo simulation
We investigate the problem of polymer translocation through a nanopore in the
absence of an external driving force. To this end, we use the two-dimensional
(2D) fluctuating bond model with single-segment Monte Carlo moves. To overcome
the entropic barrier without artificial restrictions, we consider a polymer
which is initially placed in the middle of the pore, and study the escape time
required for the polymer to completely exit the pore on either end. In
particular, we examined the effect of the pore length on the escape time.Comment: 16Pages, 6 figure
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