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The American Physical Society is the world's second largest organization of physicists. The Society publishes more than a dozen scientific journals, including the prestigious Physical Review and Physical Review Letters, and organizes more than 20 science meetings each year. It is also a member society of the American Institute of Physics. Wikipedia.

Kushi L.H.,Kaiser Permanente | Doyle C.,American Physical Society | McCullough M.,Nutritional Epidemiology | Rock C.L.,University of California at San Diego | And 6 more authors.
CA Cancer Journal for Clinicians | Year: 2012

The American Cancer Society (ACS) publishes Nutrition and Physical Activity Guidelines to serve as a foundation for its communication, policy, and community strategies and, ultimately, to affect dietary and physical activity patterns among Americans. These Guidelines, published approximately every 5 years, are developed by a national panel of experts in cancer research, prevention, epidemiology, public health, and policy, and they reflect the most current scientific evidence related to dietary and activity patterns and cancer risk. The ACS Guidelines focus on recommendations for individual choices regarding diet and physical activity patterns, but those choices occur within a community context that either facilitates or creates barriers to healthy behaviors. Therefore, this committee presents recommendations for community action to accompany the 4 recommendations for individual choices to reduce cancer risk. These recommendations for community action recognize that a supportive social and physical environment is indispensable if individuals at all levels of society are to have genuine opportunities to choose healthy behaviors. The ACS Guidelines are consistent with guidelines from the American Heart Association and the American Diabetes Association for the prevention of coronary heart disease and diabetes, as well as for general health promotion, as defined by the 2010 Dietary Guidelines for Americans and the 2008 Physical Activity Guidelines for Americans. Copyright © 2012 American Cancer Society, Inc. Source

Melikyan A.,Argonne National Laboratory | Melikyan A.,American Physical Society | Norman M.R.,Argonne National Laboratory
Physical Review B - Condensed Matter and Materials Physics | Year: 2014

We derive and analyze an effective Ginzburg-Landau (GL) functional for a charge density wave for a model of electrons on a tight-binding square lattice with density-density interactions. We show, using realistic electronic dispersions for the cuprates, that for the simplest GL theory, the preferred symmetry is typically unidirectional (stripe) type, but inclusion of third-order terms tends to destabilize this in favor of a checkerboard pattern depending on the strength and range of the interaction. This is of interest given the recent observation of such charge order in underdoped YBa2Cu3O6+x. © 2014 American Physical Society. Source

Frasco G.F.,Clarkson University | Sun J.,Clarkson University | Rozenfeld H.D.,American Physical Society | Ben-Avraham D.,Clarkson University
Physical Review X | Year: 2014

We propose a bare-bones stochastic model that takes into account both the geographical distribution of people within a country and their complex network of connections. The model, which is designed to give rise to a scale-free network of social connections and to visually resemble the geographical spread seen in satellite pictures of the Earth at night, gives rise to a power-law distribution for the ranking of cities by population size (but for the largest cities) and reflects the notion that highly connected individuals tend to live in highly populated areas. It also yields some interesting insights regarding Gibrat's law for the rates of city growth (by population size), in partial support of the findings in a recent analysis of real data [Rozenfeld et al., Proc. Natl. Acad. Sci. U.S.A. 105, 18702 (2008).]. The model produces a nontrivial relation between city population and city population density and a superlinear relationship between social connectivity and city population, both of which seem quite in line with real data. Source

Dirac's identification of the quantum analog of the Poisson bracket with the commutator is reviewed, as is the threat of self-inconsistent overdetermination of the quantization of classical dynamical variables which drove him to restrict the assumption of correspondence between quantum and classical Poisson brackets to embrace only the Cartesian components of the phase space vector. Dirac's canonical commutation rule fails to determine the order of noncommuting factors within quantized classical dynamical variables, but does imply the quantum/classical correspondence of Poisson brackets between any linear function of phase space and the sum of an arbitrary function of only configuration space with one of only momentum space. Since every linear function of phase space is itself such a sum, it is worth checking whether the assumption of quantum/classical correspondence of Poisson brackets for all such sums is still self-consistent. Not only is that so, but this slightly stronger canonical commutation rule also unambiguously determines the order of noncommuting factors within quantized dynamical variables in accord with the 1925 Born-Jordan quantization surmise, thus replicating the results of the Hamiltonian path integral, a fact first realized by E.H. Kerner. Born-Jordan quantization validates the generalized Ehrenfest theorem, but has no inverse, which disallows the disturbing features of the poorly physically motivated invertible Weyl quantization, i.e., its unique deterministic classical "shadow world" which can manifest negative densities in phase space. © 2010 Springer Science+Business Media, LLC. Source

Agency: NSF | Branch: Standard Grant | Program: | Phase: FLUID DYNAMICS | Award Amount: 25.00K | Year: 2016

PI: Cole, Ken
Proposal Number: CBET - 1650056

The award partially covers travel expenses of graduate students, post-doctoral researchers, and junior faculty members from institutions in the United States to participate in the conference entitled, ?American Physical Society, Division of Fluid Dynamics, 69th Annual DFD Meeting 2016? in Portland, OR, November 20-22, 2016. This is the largest international annual meeting of fluid dynamicists in the world, with over 2,500 anticipated attendees. The meeting has been successfully run for close to seventy years.

The priorities of the travel grant program are to partially fund students, young scientists, and, in general, scientists from under-represented groups. The APS DFD Executive Committee plans to contribute $20,000 and the American Institute for Physics plans to contribute $10,000 to the overall budget for travel awards. This total amount expected is $55,000 to facilitate travel subsidies and registration fee coverage for about 70 participants. The chief intellectual merit of this conference lies in the exchange of scientific ideas, presentations of cutting edge research, and exposure to a richly diverse array of topics in virtually every sub-discipline of fluid dynamics. The broader impact will be to increase participation of students and young scientists who would not otherwise be able to afford to travel to the meeting and pay associated costs. Preference is given: (i) to those presenting talks at the meeting, (ii) to students, (iii) to those who have not received such an award in the past, and (iv) to no more than one applicant from a given research adviser. Since the awards are meant to supplement participant travel funds, not to cover these entirely, the committee takes into account the travel budget entered on the application. Special effort is made to achieve diverse participation from underrepresented groups in engineering, including women and members of minority groups. Even though the conference is attended by worldwide attendees, the NSF support will fund individuals from the US.

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