210 research outputs found
Student Affairs in Canada in 2013 Perceptions, Trends, and an Outlook toward the Future
Chief Student Affairs Officers (CSAOs) are senior-level student affairs personnel. In 2011, 33 CSAOs responded to a national survey and provided a professional perspective on field development, student services, as well as predicted five-year trends for student affairs. In 2013, 17 CSAOs responded to the same survey and provided further information on these topics. Results indicated that attitudes towards diversity and technology remained stable between 2011 and 2013. We established that CSAOs have less positive attitudes towards research, evaluation, and assessment than they do towards communication and leadership. Here, we discuss at length the implications of these finding, as well as the potential for research into student affairs. In addition, we examine the continued professionalization of the CSAO field and note that research into CSAOs should be proactive instead of reactive.
Les directeurs des affaires étudiantes sont des membres du personnel des affaires étudiantes aux niveaux supérieurs. En 2011, 33 de ces directeurs ont répondu à un sondage national et fourni une perspective professionnelle sur la mise en valeur de leur domaine, sur les services aux étudiants, ainsi que sur leurs prédictions des tendances des cinq prochaines années pour les affaires étudiantes. En 2013, 17 directeurs ont répondu au même sondage et ont fourni plus de données sur ces mêmes sujets. Les résultats indiquaient que les attitudes envers la diversité et la technologie étaient demeurées stables entre 2011 et 2013. Nous avons pu établir que les directeurs présentent des attitudes moins positives envers la recherche, l’évaluation et les épreuves, qu’envers la communication et le leadership. Nous nous attardons ici sur les implications de ces découvertes, de même que sur leur potentiel pour la recherche au sujet des affaires étudiantes. Nous discutons aussi de la professionnalisation du domaine des directeurs des affaires étudiantes et notons que la recherche au sujet des directeurs doit être proactive plutôt que réactive
Extreme asteroids in the Pan-STARRS 1 Survey
Using the first 18 months of the Pan-STARRS 1 survey we have identified 33
candidate high-amplitude objects for follow-up observations and carried out
observations of 22 asteroids. 4 of the observed objects were found to have
observed amplitude mag. We find that these high amplitude
objects are most simply explained by single rubble pile objects with some
density-dependent internal strength, allowing them to resist mass shedding even
at their highly elongated shapes. 3 further objects although below the cut-off
for 'high-amplitude' had a combination of elongation and rotation period which
also may require internal cohesive strength, depending on the density of the
body. We find that none of the 'high-amplitude asteroids' identified here
require any unusual cohesive strengths to resist rotational fission. 3
asteroids were sufficiently observed to allow for shape and spin pole models to
be determined through light curve inversion. 45864 was determined to have
retrograde rotation with spin pole axes and asteroid 206167 was found to have best fit spin
pole axes , . An additional
object not initially measured with mag, 49257, was determined to
have a shape model which does suggest a high-amplitude object. Its spin pole
axes were best fit for values .
In the course of this project to date no large super-fast rotators ( h) have been identified.Comment: 31 pages; accepted by A
The matallicities of star-forming galaxies at intermediate redshifts 0.47 < z < 0.92
Estimates of the [O/H] metallicity of the star-forming gas in a sample of 66
CFRS galaxies between 0.47 < z < 0.92 have been made based on the flux ratios
of bright emission lines. Most galaxies (> 75%) have the [O/H] ~ 8.9
metallicities that are seen locally in galaxies of similar luminosities.
However, a minority (< 25%) appear to have significantly lower metallicities
[O/H] < 8.6 as indicated by high values of the Pagel R23 parameter. The high
metallicities of the majority of the galaxies suggest that they do not fade to
be low metallicity dwarf galaxies today. Only one of the 66 galaxies has an
optical emission line spectrum similar to the few Lyman break galaxies recently
observed at z ~ 3, emphasizing the differences with that population. The
inferred emission line gas [O/H] metallicity broadly correlates with luminosity
in both the rest B- and J-bands but with considerable scatter introduced. The
metallicity does not appear to correlate well with galaxy size, H-beta strength
or, with the very limited data available, the kinematics. The metallicity does
correlate well with the continuum optical-infrared colors in a way that could
be explained as a combination of effects, none of which should produce large
variations in the M/L ratio. These results support a "down-sizing" picture of
galaxy evolution rather than a "fading dwarf" picture in which the luminous
active galaxies at high redshift are highly brightened dwarf galaxies. The
overall change in metallicity of star-forming galaxies over the last half of
the age of the Universe appears to have been modest, Delta[O/H] = 0.08 +/-
0.06. This is consistent with the age-metallicity relation in the Galactic disk
and is broadly consistent with models for the chemical evolution of the
Universe, especially those that consider different environments.Comment: 26 pages, accepted for publication in Astrophysical Journal (July 10
2003
High redshift evolution of optically and IR-selected galaxies: a comparison with CDM scenarios
A combination of ground-based (NTT and VLT) and HST (HDF-N and HDF-S) public
imaging surveys have been used to collect a sample of 1712 I-selected and 319
galaxies. Photometric redshifts have been obtained for all these
galaxies. The results have been compared with the prediction of an analytic
rendition of the current CDM hierarchical models for galaxy formation. We focus
in particular on two observed quantities: the galaxy redshift distribution at
K<21 and the evolution of the UV luminosity density. The derived photometric
redshift distribution is in agreement with the hierarchical CDM prediction,
with a fraction of only 5% of galaxies detected at z>2. This result strongly
supports hierarchical scenarios where present-day massive galaxies are the
result of merging processes. The observed UV luminosity density in the
I-selected sample is confined within a factor of 4 over the whole range
0<z<4.5. CDM models in a critical Universe are not able to produce the density
of UV photons that is observed at z>3. CDM models in -dominated
universe are in better agreement at 3<z<4.5, but predict a pronounced peak at
z~1.5 and a drop by a factor of 8 from z=1.5 to z=4 that is not observed in the
data. We conclude that improvements are required in the treatment of the
physical processes directly related to the SFR, e.g. the starbust activity in
merger processes and/or different feedback to the star formation activity.Comment: Figures 2 and 3 modified to match the published versio
Disclination Unbinding Transition in Quantum Hall Liquid Crystals
We derive the the long-wavelength elastic theory for the quantum Hall smectic
state starting from the Hartree-Fock approximation. Dislocations in this state
lead to an effective nematic model for , which undergoes a disclination
unbinding transition from a phase with algebraic orientational order into an
isotropic phase. We obtain transition temperatures which are in qualitative
agreement with recent experiments which have observed large anisotropies of the
longitudinal resistivities in half-filled Landau levels, lending credence to
the liquid crystal interpretation of experiments.Comment: Added explanation for spin dependence of anisotropic strength: The
reason for this spin oscillation is simple: in the energetics of Eqs. (4-6),
there is an energy scale that decreases with increasing filling
factor ; simultaneously the matrix elements of the Coulomb interaction
[Eq. (3)] increase with increasing LL index , resulting in the observed
spin dependenc
Roundtable debate: Controversies in the management of the septic patient – desperately seeking consensus
Despite continuous advances in technologic and pharmacologic management, the mortality rate from septic shock remains high. Care of patients with sepsis includes measures to support the circulatory system and treat the underlying infection. There is a substantial body of knowledge indicating that fluid resuscitation, vasopressors, and antibiotics accomplish these goals. Recent clinical trials have provided new information on the addition of individual adjuvant therapies. Consensus on how current therapies should be prescribed is lacking. We present the reasoning and preferences of a group of intensivists who met to discuss the management of an actual case. The focus is on management, with emphasis on the criteria by which treatment decisions are made. It is clear from the discussion that there are areas where there is agreement and areas where opinions diverge. This presentation is intended to show how experienced intensivists apply clinical science to their practice of critical care medicine
Responding to the U.S. Research Community\u27s Liquid Helium Crisis
An Action Plan to Preserve U.S. Innovation. This report lays out the issues facing researchers who use liquid helium and the negative impact on U.S. innovation. The report then proposes five key steps that will have a transformative effect on the ability to maintain the ready availability of helium and ensure the vibrancy of the U.S. low-temperature research capability. These recommendations focus on: conservation of helium use; a mechanism to pay for the capital investment required for helium recycling; a mechanism to ensure an appropriate price is paid by researchers for helium; and a methodology which allows researchers to best explore the options available to them. A SCIENCE POLICY REPORT ISSUED BY: American Physical Society, Materials Research Society, American Chemical Society Representing more than 200,000 scientists, engineers, and innovator worldwide. This report was overseen by the APS Panel on Public Affairs (POPA). POPA routinely produces reports on timely topics being debated in government so as to inform the debate with the perspectives of physicists working in the relevant issue areas
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