742 research outputs found
Hallmarks of Successful Emerging Leader Programs: An Exploration of Effective First-Year, Non-Positional, Co-Curricular Emerging Leader Programs at Colleges and Universities.
Throughout the United States, colleges and universities invest heavily in first year programming. Many of these institutions provide leadership development programs for students. The programs at the intersection at these two efforts are often called emerging leader programs. This study examines co-curricular, non-positional emerging leader programs for first-year students.Specifically, this study examines three aspects of emerging leader programs at three universities. First is an exploration of the way assessment impacts emerging leader programs. Second is an examination of the role that departmental and programmatic structures play in these programs. Finally this study explores the hallmarks of successful programs.This study uses a multi case study approach to establish an understanding of the role of assessment and structures in emerging leader programs and then employs the use of grounded theory to explore the hallmarks of successful emerging leader programs.The findings in this study suggest that assessment does not impact these programs significantly. Structures impact program success specifically relating to delivery format. Finally this study identified three hallmarks of emerging leader programs. These are connection, peer mentorship and future framing. Future framing is the ability of a program to teach leadership concepts to students in ways that support future application
Best Practice Guidelines on molecular diagnostics in Duchenne/Becker muscular dystrophies
Meeting participants: Rosário dos Santos, Porto, PortugalIntroduction: A meeting of 29 senior scientists from Europe, the USA, India
and Australia, was held in Naarden, The Netherlands on November
14–16, 2008, to establish consensus Best Practice Guidelines for
molecular diagnosis of Duchenne and Becker muscular dystrophy
(DMD/BMD). New therapeutic trials for DMD demand accurate
diagnosis of the disorder, especially where the therapy is targeted
towards specific mutations. These guidelines aim to help diagnostic
laboratories attain that accuracy by describing the minimum
standards for acceptable molecular diagnostic testing of DMD.
For the different types of clinical referral received by a molecular
diagnostic laboratory, the guidelines recommend the appropriate
tests to be carried out, interpretation of the results and how those
results should be reported.The workshop was jointly organised and sponsored by The European Molecular Genetics Quality Network (www.emqn.org); Euro-
Gentest (www.eurogentest.org); EU Contract no. FP6-512148); TREAT-NMD (www.treat-nmd.org); EU Contract no. FP6-036825),
and hosted by the European Neuro-Muscular Centre (www.enmc.org)
Asymptotic Scaling of the Diffusion Coefficient of Fluctuating "Pulled" Fronts
We present a (heuristic) theoretical derivation for the scaling of the
diffusion coefficient for fluctuating ``pulled'' fronts. In agreement
with earlier numerical simulations, we find that as ,
approaches zero as , where is the average number of particles per
correlation volume in the stable phase of the front. This behaviour of
stems from the shape fluctuations at the very tip of the front, and is
independent of the microscopic model.Comment: Some minor algebra corrected, to appear in Rapid Comm., Phys. Rev.
First order optical potentials and 25 to 40 MeV proton elastic scattering
The differential cross sections and analyzing powers from the elastic
scattering of 25 and 40 MeV protons from many nuclei have been studied.
Analyses have been made using a fully microscopic model of proton-nucleus
scattering seeking to establish a means appropriate for use in analyses of
radioactive beam scattering from hydrogen with ion energies 25A and 40A MeV.Comment: 9 pages, RevTeX, 4 figure
Expanding running coupling effects in the hard Pomeron
We study QCD hard processes at scales of order k^2 > Lambda^2 in the limit in
which the beta-function coefficient - b is taken to be small, but alphas(k) is
kept fixed. The (nonperturbative) Pomeron is exponentially suppressed in this
limit, making it possible to define purely perturbative high-energy Green's
functions. The hard Pomeron exponent acquires diffusion and running coupling
corrections which can be expanded in the b parameter and turn out to be
dependent on the effective coupling b alphas^2 Y. We provide a general setup
for this b-expansion and we calculate the first few terms both analytically and
numerically.Comment: 36 pages, 15 figures, additional references adde
Independence of , Poincare Invariance and the Non-Conservation of Helicity
A relativistic constituent quark model is found to reproduce the recent data
regarding the ratio of proton form factors, . We show that
imposing Poincare invariance leads to substantial violation of the helicity
conservation rule, as well as an analytic result that the ratio
for intermediate values of .Comment: 13 pages, 7 figures, to be submitted to Phys. Rev. C typos corrected,
references added, 1 new figure to show very high Q^2 behavio
Quasi-stationary regime of a branching random walk in presence of an absorbing wall
A branching random walk in presence of an absorbing wall moving at a constant
velocity undergoes a phase transition as the velocity of the wall
varies. Below the critical velocity , the population has a non-zero
survival probability and when the population survives its size grows
exponentially. We investigate the histories of the population conditioned on
having a single survivor at some final time . We study the quasi-stationary
regime for when is large. To do so, one can construct a modified
stochastic process which is equivalent to the original process conditioned on
having a single survivor at final time . We then use this construction to
show that the properties of the quasi-stationary regime are universal when
. We also solve exactly a simple version of the problem, the
exponential model, for which the study of the quasi-stationary regime can be
reduced to the analysis of a single one-dimensional map.Comment: 2 figures, minor corrections, one reference adde
Dynamics of droplet formation at T-shaped nozzles with elastic feed lines
We describe the formation of water in oil droplets, which are commonly used in lab-on-a-chip systems for sample generation and dosing, at microfluidic T-shaped nozzles from elastic feed lines. A narrow nozzle forms a barrier for a liquid-liquid interface, such that pressure can build up behind the nozzle up to a critical pressure. Above this critical pressure, the liquid bursts into the main channel. Build-up of pressure is possible when the fluid before the nozzle is compressible or when the channel that leads to the nozzle is elastic. We explore the value of the critical pressure and the time required to achieve it. We describe the fluid flow of the sudden burst, globally in terms of flow rate into the channel and spatially resolved in terms of flow fields measured using micro-PIV. A total of three different stages-the lag phase, a spill out phase, and a linear growth phase-can be clearly discriminated during droplet formation. The lag time linearly scales with the curvature of the interface inside the nozzle and is inversly proportional to the flow rate of the dispersed phase. A complete overview of the evolution of the growth of droplets and the internal flow structure is provided in the digital supplement.FWN – Publicaties zonder aanstelling Universiteit Leide
Few-nucleon systems in translationally invariant harmonic oscillator basis
We present a translationally invariant formulation of the no-core shell model
approach for few-nucleon systems. We discuss a general method of
antisymmetrization of the harmonic-oscillator basis depending on Jacobi
coordinates. The use of a translationally invariant basis allows us to employ
larger model spaces than in traditional shell-model calculations. Moreover, in
addition to two-body effective interactions, three- or higher-body effective
interactions as well as real three-body interactions can be utilized. In the
present study we apply the formalism to solve three and four nucleon systems
interacting by the CD-Bonn nucleon-nucleon potential. Results of ground-state
as well as excited-state energies, rms radii and magnetic moments are
discussed. In addition, we compare charge form factor results obtained using
the CD-Bonn and Argonne V8' NN potentials.Comment: 25 pages. RevTex. 13 Postscript figure
Jet-jet and hadron-jet correlations in hadro- and electro-production
We discuss, in the framework of perturbative QCD at next to leading order,
two related observables which are usually considered to provide tests of the
BFKL dynamics : jet-jet correlations at Tevatron energies and forward
particle-jet correlations at HERA. In the first case we study the rapidity gap
dependence of the azimuthal correlations and find slightly too strong
correlations at large gap. In the second case we discuss the cross section as
well as the azimuthal correlations over a rapidity gap range of 5 units. We
find that the requirement of a forward particle imposes strong kinematical
constraints which distort the distributions, notably at small rapidity gaps. We
also show that the decorrelation is stronger in electroproduction than in
hadron-hadron collisions. Unfortunately no data are yet available for
comparison.Comment: LaTeX, 19 pages, 7 figures (9 figure files
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