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JHU Opportunity Journal - Sam's Frat Pitches in on Service Day
Sophomore Sam Cook and his fraternity brothers volunteer time at the Loading Dock -- a non-profit building materials refuse center -- during the 2011 Johns Hopkins University's President's Day of Service.
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Barberism
Barbering was big business a century ago. It required the right equipment. This segment considers a 1920s salesman sample of a barber chair that was a cut above the rest.
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Is the End Near for the Eurozone?
Warning signs are flashing red. Bond markets are projecting a 98% chance of default on Greece's debt. Stock prices for French banks, heavily invested in that debt, have plunged 10% in recent days. Has the European debt crisis hit the breaking point, with Greece -- and perhaps others -- soon to exit the eurozone? Or, will officials once more cobble together new agreements that keep Greece in the club and prevent a huge contagion effect likely to cripple an already slowing global economy? Wharton
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Stress-induced phase transformations in shape-memory polycrystals
Shape-memory alloys undergo a solid-to-solid phase transformation involving a change of crystal structure. We examine model problems in the scalar setting motivated by the situation when this transformation is induced by the application of stress in a polycrystalline material made of numerous grains of the same crystalline solid with varying orientations. We show that the onset of transformation in a granular polycrystal with homogeneous elasticity is in fact predicted accurately by the so-call
Author(s): Bhattacharya, Kaushik,Schlömerkemper, Anja

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Characterization of soft stripe-domain deformations in SmC and SmC* liquid-crystal elastomers
The neo-classical model of SmC (and SmC*) elastomers developed byWarner and Adams predicts a class of ÃÂÃÂÂ
Author(s): Biggins, J. S.,Bhattacharya, K.

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A sharp interface model for the propagation of martensitic phase boundaries
A model for the quasistatic evolution of martensitic phase boundaries is presented. The model is essentially the gradient flow of an energy that can contains elastic energy due to the underlying change in crystal structure in the course of the phase transformation and surface energy penalizing the area of the phase boundary. This leads to a free boundary problem with a nonlocal velocity that arises from the coupling to the elasticity equation. We show existence of solutions under a technical c
Author(s): Dondl, Patrick W.,Bhattacharya, Kaushik

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A coarse-grained model of the myofibril: overall dynamics and the evolution of sarcomere non-uniform
A theoretical framework for predicting the macroscopic behavior of a muscle myofibril based on the collective behavior of sarcomeres is presented. The analysis is accomplished by rigorously transforming the nonlinear dynamics of an assemblage of sarcomeres into a partial differential equation for the probability distribution function of sarcomere lengths in the presence of stochastic temporal fluctuations and biological variability. This enables the study of biologically relevant specimens with
Author(s): Givli, Sefi,Bhattacharya, Kaushik

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Spectral-element modeling of spontaneous earthquake rupture on rate and state faults: Effect of velo
We develop a spectral-element methodology (SEM) for simulating dynamic rupture on rate and state faults and use it to study how the rupture is affected by a shallow fault region of steady-state velocity-strengthening friction. Our comparison of the developed SEM and a spectral boundary-integral method (BIM) for an anti-plane (two-dimensional) test problem shows that the two methods produce virtually identical solutions for the finest resolution we use and that the convergence with grid reductio
Author(s): Kaneko, Yoshihiro,Lapusta, Nadia,Ampuero, Jean-Pau

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Highly Nonlinear Solitary Waves in Periodic Dimer Granular Chains
We report the propagation of highly nonlinear solitary waves in heterogeneous, periodic granular media using experiments, numerical simulations, and theoretical analysis. We examine periodic arrangements of particles in experiments in which stiffer/heavier beads (stainless steel) are alternated with softer/lighter ones (polytetrafluoroethylene beads). We find excellent agreement between experiments and numerics in a model with Hertzian interactions between adjacent beads, which in turn agrees ve
Author(s): Porter, Mason A.,Daraio, Chiara,Herbold, Eric B.,S

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Solutions to the Eshelby Conjectures
We present solutions to the Eshelby conjectures based on a variational inequality. We first discuss the meanings of the original Eshelby's statement. By Fourier analysis, we establish the connection between the homogeneous Eshelby inclusion problem and the classic Newtonian potential problem. We then proceed to the solutions of the Eshelby conjectures. Under some hypothesis on the material properties and restricted to connected inclusions with Lipschitz boundary, we show that one version of the
Author(s): Liu, Liping

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Is Economics Worthless Ideology?

Theory and Practice

In fêting the latest recipients of the Nobel Memorial Prize in Economic Science, Christopher Sims and Thomas Sargent, the New York Times editorializes that somehow this is a "victory" for empiricism over theory. Although the editors don't co
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De Biologie Corner is een resource site voor biologie en docenten. Het bevat een scala aan lessen, quizzen, laboratoria, web quests, en informatie over wetenschappelijke onderwerpen. Je kunt hier lessen in verband met …


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Lees een compleet projectplan over het organiseren van een student Parlement. Het project duurt een schooljaar en neemt een dubbele les per maand.


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Multi-Dimensional Recruiting: Electronic Evidence Breaking Traditions
Paul Watkins, Ruth Ann Roberts
An electronic performance portfolio can lift a candidate off the resume page and on to a virtual stage. A principal can literally watch as the teacher candidate performs on the classroom stage. […]

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Teagardens at Thunderbird
Executive MBA student Ronald Teagarden, a third-generation T-bird, talks about growing up in a Thunderbird family. His mom is Thunderbird Professor Mary Teagarden, Ph.D., and his grandfather was a Thunderbird Airfield flight instructor.
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Miss World turns 60
Nov. 1 - Miss World contestants pose in London ahead of the finals of the competition next weekend in the city where it all began 60 years ago. Kilmeny Duchardt reports.
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Monkey brainwaves control avatar
Read more: http://www.newscientist.com/article/dn21008-monkeys-feel-texture-of-virtual-objects.html
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Robot builds itself out of foam
Read more: http://www.newscientist.com/article/mg21228346.600-robot-builds-its-own-body-from-sprayable-foam.html
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Worm: The First Digital World War
[Recorded: October 25, 2011] "A new digital plague has hit the Internet, infecting millions of personal and business computers in what seems to be the first step of a multistage attack. The world's leading computer security experts do not yet know who programmed the infection, or what the next stage will be." John Markoff, The New York Times January 22, 2009 When the Conficker computer worm was unleashed on the world in November 2008, cybersecurity experts did not know what to make of it. The
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Authors@Google: Steven Pinker
The author of The New York Times bestseller The Stuff of Thought offers a controversial history of violence. Faced with the ceaseless stream of news about war, crime, and terrorism, one could easily think we live in the most violent age ever seen. Yet as New York Times bestselling author Steven Pinker shows in this startling and engaging new work, just the opposite is true: violence has been diminishing for millennia and we may be living in the most peaceful time in our species's existence. For
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