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Search Results: 1 - 10 of 472566 matches for " Gregory A. Smith "
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Following the Evidence: Approaches to Assessment in Academic Libraries
Gregory A. Smith
Kansas Library Association College and University Libraries Section Proceedings , 2011, DOI: 10.4148/culs.v1i0.1366
Abstract: In an environment of strained budgets and heightened accountability, academic libraries need to base their planning, decision-making, and advocacy on evidence more than ever before. Fortunately, the resources required to collect, analyze, and visualize data—thus turning it into evidence—are increasingly accessible. This session will challenge participants to grow in their handling of evidence by exposing them to a range of data sources and analysis tools. In order to accomplish this goal, the presenter will share brief sketches of a number of recent library assessment efforts, focusing on projects with which he has been involved personally. The session’s brevity will preclude showing participants the mechanics of any specific kind of assessment. Therefore, the presenter’s primary aim will be to impart a vision for using evidence to increase efficiency and enhance customer satisfaction. A secondary aim will be to refer participants to a variety of resources for further exploration: tools, books, journal literature, conferences, and more.
Al-Qaeda in the Lands of the Islamic Maghreb
Gregory A. Smith
Journal of Strategic Security , 2009,
Abstract: This paper is organized into four chapters that focus on the terrorist group Al Qaeda in the Lands of the Islamic Maghreb (AQIM). The four chapters examine different facets of the collective environment that have allowed AQIM to succeed and even thrive at times. The first chapter begins with Algeria’s war of independence with the French. The second chapter focuses on the nomadic Tuareg people. It seeks to show how the Tuaregs were deprived by French occupiers and how European colonization cost the Tuaregs access to vital trade routes used for centuries. The third chapter will very briefly examine Algeria’s civil war and the emergence of modern terrorist groups. The fourth chapter will discuss the post-9/11 world in terms of “shaping operations” for the Global War on Terrorism (GWOT ) and how this caused an evolution in terrorism as a reaction to actual or perceived American hegemonic ambitions.This paper is not a compendium of every event or in any way a complete history of the region. It is intended to reinforce the author’s notion of outlying antecedents that normally coalesce around a central issue and how the addition of a political agenda can lead these antecedents toward a fusion point. When the fusion point is met, ethno-nationalist ambitions are catapulted down the road of terrorism and the fundamental message is lost in the debris of another attack. Such is the story of AQIM…
Rotational and Cyclical Variability in gamma Cassiopeiae. II. Fifteen Seasons
Gregory W. Henry,Myron A. Smith
Physics , 2012, DOI: 10.1088/0004-637X/760/1/10
Abstract: The B0.5IVe star gam Cas is of great interest because it is the prototype of a small group of classical Be stars having hard X-ray emission of unknown origin. We discuss results from ongoing B and V observations of the gam Cas star-disk system acquired with an APT during the observing seasons 1997-2011. In an earlier study, Smith, Henry, & Vishniac showed that light variations in gam Cas are dominated by a series of comparatively prominent cycles with amplitudes of 0.02-0.03 mag and lengths of 2-3 months, superimposed on a 1.21-day periodic signal some five times smaller, which they attributed to rotation. The cycle lengths clustered around 70 days. Changes in both cycle length and amplitude were observed from year to year. These authors also found the V-band cycles to be 30-40% larger than the B-band cycles. In the present study we find continued evidence for these variability patterns and for the bimodal distribution of the B/V amplitude ratios in the long cycles. During the 2010 observing season, gam Cas underwent a mass loss event (outburst), as evidenced by the brightening and reddening seen in our new photometry. This episode coincided with a waning of the amplitude in the ongoing cycle. The Be outburst ended the following year, and the light-curve amplitude returned to pre-outburst levels. This behavior reinforces the interpretation that cycles arise from a global disk instability. Remarkably, we also find that both the amplitude and the asymmetry of the rotational waveform changed over the years. We review arguments for this modulation arising from transits of a surface magnetic disturbance. Finally, to a limit of 5 mmag, we find no evidence for any photometric variation corresponding to the gam Cas binary period, 203.55 days, or to the first few harmonics.
Alphaherpesviruses and the Cytoskeleton in Neuronal Infections
Sofia V. Zaichick,Kevin P. Bohannon,Gregory A. Smith
Viruses , 2011, DOI: 10.3390/v3070941
Abstract: Following infection of exposed peripheral tissues, neurotropic alphaherpesviruses invade nerve endings and deposit their DNA genomes into the nuclei of neurons resident in ganglia of the peripheral nervous system. The end result of these events is the establishment of a life-long latent infection. Neuroinvasion typically requires efficient viral transmission through a polarized epithelium followed by long-distance transport through the viscous axoplasm. These events are mediated by the recruitment of the cellular microtubule motor proteins to the intracellular viral particle and by alterations to the cytoskeletal architecture. The focus of this review is the interplay between neurotropic herpesviruses and the cytoskeleton.
A description of the FAMOUS (version XDBUA) climate model and control run
R. S. Smith, J. M. Gregory,A. Osprey
Geoscientific Model Development (GMD) & Discussions (GMDD) , 2008, DOI: 10.5194/gmd-1-53-2008
Abstract: FAMOUS is an ocean-atmosphere general circulation model of low resolution, capable of simulating approximately 120 years of model climate per wallclock day using current high performance computing facilities. It uses most of the same code as HadCM3, a widely used climate model of higher resolution and computational cost, and has been tuned to reproduce the same climate reasonably well. FAMOUS is useful for climate simulations where the computational cost makes the application of HadCM3 unfeasible, either because of the length of simulation or the size of the ensemble desired. We document a number of scientific and technical improvements to the original version of FAMOUS. These improvements include changes to the parameterisations of ozone and sea-ice which alleviate a significant cold bias from high northern latitudes and the upper troposphere, and the elimination of volume-averaged drifts in ocean tracers. A simple model of the marine carbon cycle has also been included. A particular goal of FAMOUS is to conduct millennial-scale paleoclimate simulations of Quaternary ice ages; to this end, a number of useful changes to the model infrastructure have been made.
A description of the FAMOUS (version XDBUA) climate model and control run
R. S. Smith,J. M. Gregory,A. Osprey
Geoscientific Model Development Discussions , 2008,
Abstract: FAMOUS is an ocean-atmosphere general circulation model of low resolution, capable of simulating well in excess of 100 years of model climate per wallclock day using current high performance computing facilities. It uses most of the same code as HadCM3, a widely used climate model of higher resolution and computational cost, and has been tuned to reproduce the same climate reasonably well. FAMOUS is useful for climate simulations where the computational cost makes the application of HadCM3 unfeasible, either because of the length of simulation or the size of the ensemble desired. We document a number of scientific and technical improvements to the original version of FAMOUS. These improvements include changes to the parameterisations of ozone and sea-ice which remove a significant cold bias from high northern latitudes and the upper troposphere, and the elimination of volume-averaged drifts in ocean tracers. There are also changes to the model infrastructure which facilitate paleoclimate simulations.
X-ray and Optical Variations in the Classical Be Star gamma Cas
Richard D. Robinson,Myron A. Smith,Gregory W. Henry
Physics , 2002, DOI: 10.1086/341141
Abstract: gamma Cas (B0.5e) is known to be a unique X-ray source because ot its moderate L_x, hard X-ray spectrum, and light curve punctuated by ubiquitous flares and slow undulations. Its X-ray peculiarities have led to a controversy concerning their origin: either from wind infall onto a putative degenerate companion, as for typical Be/X-ray binaries, or from the Be star per se. Recent progress has been made to address this: (1) the discovery that gamma Cas is an eccentric binary system (P = 203.59 d) with unknown secondary type, (2) the accumulation of RXTE data at 9 epochs in 1996-2000, and (3) the collation of robotic telescope B, V-band photometric observations over 4 seasons. The latter show a 3%, cyclical flux variation with cycle lengths 55-93 days. We find that X-ray fluxes at all 9 epochs show random variations with orbital phase. This contradicts the binary accretion model, which predicts a substantial modulation. However,these fluxes correlate well with the cyclical optical variations. Also, the 6 flux measurements in 2000 closely track the interpolated optical variations between the 2000 and 2001 observing seasons. Since the optical variations represent a far greater energy than that emitted as X-rays, the optical variability cannot arise from X-ray reprocessing. However, the strong correlation between the two suggests that they are driven by a common mechanism. We propose that this mechanism is a cyclical magnetic dynamo excited by a Balbus-Hawley instability located within the inner part of the circumstellar disk. In our model, variations in the field strength directly produce the changes in the magnetically related X-ray activity. Turbulence associated with the dynamo results in changes to the density distribution within the disk and creates the observed optical variations.
The orbifold Chow ring of toric Deligne-Mumford stacks
Lev A. Borisov,Linda Chen,Gregory G. Smith
Mathematics , 2003, DOI: 10.1090/S0894-0347-04-00471-0
Abstract: Generalizing toric varieties, we introduce toric Deligne-Mumford stacks which correspond to combinatorial data. The main result in this paper is an explicit calculation of the orbifold Chow ring of a toric Deligne-Mumford stack. As an application, we prove that the orbifold Chow ring of the toric Deligne-Mumford stack associated to a simplicial toric variety is a flat deformation of (but is not necessarily isomorphic to) the Chow ring of a crepant resolution.
TRial of an Educational intervention on patients' knowledge of Atrial fibrillation and anticoagulant therapy, INR control, and outcome of Treatment with warfarin (TREAT)
Danielle E Smith, Christian Xuereb, Helen M Pattison, Gregory YH Lip, Deirdre A Lane
BMC Cardiovascular Disorders , 2010, DOI: 10.1186/1471-2261-10-21
Abstract: Randomised controlled trial of an intensive educational intervention will consist of group sessions (between 2-8 patients) containing standardised information about the risks and benefits associated with OAC therapy, lifestyle interactions and the importance of monitoring and control of their International Normalised Ratio (INR). Information will be presented within an 'expert-patient' focussed DVD, revised educational booklet and patient worksheets. 200 warfarin-na?ve patients who are eligible for warfarin will be randomised to either the intervention or usual care groups. All patients must have ECG-documented AF and be eligible for warfarin (according to the NICE AF guidelines). Exclusion criteria include: aged < 18 years old, contraindication(s) to warfarin, history of warfarin USE, valvular heart disease, cognitive impairment, are unable to speak/read English and disease likely to cause death within 12 months. Primary endpoint is time spent in TTR. Secondary endpoints include measures of quality of life (AF-QoL-18), anxiety and depression (HADS), knowledge of AF and anticoagulation, beliefs about medication (BMQ) and illness representations (IPQ-R). Clinical outcomes, including bleeding, stroke and interruption to anticoagulation will be recorded. All outcome measures will be assessed at baseline and 1, 2, 6 and 12 months post-intervention.More data is needed on the clinical benefit of educational intervention with AF patients receiving warfarin.ISRCTN93952605Atrial fibrillation (AF) is the most common arrhythmia in clinical practice, for people aged 40 years and older the lifetime risk of developing AF is approximately 25% [1]. AF is an independent risk factor for stroke, conferring a five-fold excess risk in AF patients compared to those in sinus rhythm [2] and accounts for almost 10-15% of all ischaemic strokes and approximately one in four strokes in those aged over 80 years [2]. Furthermore, when a stroke occurs in association with AF, patients have substan
SPAN512: A new mid-latitude pulsar survey with the Nancay Radio Telescope
Gregory Desvignes,Isma?l Cognard,David Champion,Patrick Lazarus,Patrice Lespagnol,David A. Smith,Gilles Theureau
Physics , 2012, DOI: 10.1017/S1743921312024179
Abstract: We present an ongoing survey with the Nan\c{c}ay Radio Telescope at L-band. The targeted area is $74^\circ \lesssim l <150^\circ$ and $3.5^\circ < |b| < 5^\circ$. This survey is characterized by a long integration time (18 min), large bandwidth (512 MHz) and high time and frequency resolution (64 $\mu$s and 0.5 MHz) giving a nominal sensitivity limit of 0.055 mJy for long period pulsars. This is about 2 times better than the mid-latitude HTRU survey, and is designed to be complementary with current large scale surveys. This survey will be more sensitive to transients (RRATs, intermittent pulsars), distant and faint millisecond pulsars as well as scintillating sources (or any other kind of radio faint sources) than all previous short-integration surveys.
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