2,311 research outputs found
It’s more than just books: working with a corporate marketing team to promote library services
In 2005, the Library at the University of East London reviewed its printed promotional material and general marketing strategy, working with the University’s communications team. The issues considered included: evaluating the strategy to decide whether it should be short-term or long-term; the problem of information overload; defining the library's "message"; the most appropriate format to use. The main elements involved in the development and implementation of the new promotional brochure are presented, including: design aspects; branding and slogans; editing and checking. Concludes with an assessment of whether the new scheme worked and discusses the experience of working with non-librarians in a project
Testing the Invariance of Cooling Rate in Gamma-Ray Burst Pulses
Recent studies have found that the spectral evolution of pulses within
gamma-ray bursts (GRBs) is consistent with simple radiative cooling. Perhaps
more interesting was a report that some bursts may have a single cooling rate
for the multiple pulses that occur within it. We determine the probability that
the observed "cooling rate invariance" is purely coincidental by sampling
values from the observed distribution of cooling rates. We find a 0.1-26%
probability that we would randomly observe a similar degree of invariance based
on a variety of pulse selection methods and pulse comparison statistics. This
probability is sufficiently high to warrant skepticism of any intrinsic
invariance in the cooling rate.Comment: 4 pages, 1 figure, to appear in Proceedings of the Fourth Huntsville
Symposium on Gamma-Ray Burst
Confronting Synchrotron Shock and Inverse Comptonization Models with GRB Spectral Evolution
The time-resolved spectra of gamma-ray bursts (GRBs) remain in conflict with
many proposed models for these events. After proving that most of the bursts in
our sample show evidence for spectral "shape-shifting", we discuss what
restrictions that BATSE time-resolved burst spectra place on current models. We
find that the synchrotron shock model does not allow for the steep low-energy
spectral slope observed in many bursts, including GRB 970111. We also determine
that saturated Comptonization with only Thomson thinning fails to explain the
observed rise and fall of the low-energy spectral slope seen in GRB 970111 and
other bursts. This implies that saturated Comptonization models must include
some mechanism which can cause the Thomson depth to increase intially in
pulses.Comment: (5 pages, 3 figures, to appear in Proceedings of the Fourth
Huntsville Symposium on Gamma-Ray Bursts
Variation in pelvic morphology may prevent the identification of anterior pelvic tilt
Pelvic tilt is often quantified using the angle between the horizontal and a line connecting the anterior superior iliac spine (ASIS) and the posterior superior iliac spine (PSIS). Although this angle is determined by the balance of muscular and ligamentous forces acting between the pelvis and adjacent segments, it could also be influenced by variations in pelvic morphology. The primary objective of this anatomical study was to establish how such variation may affect the ASIS-PSIS measure of pelvic tilt. In addition, we also investigated how variability in pelvic landmarks may influence measures of innominate rotational asymmetry and measures of pelvic height. Thirty cadaver pelves were used for the study. Each specimen was positioned in a fixed anatomical reference position and the angle between the ASIS and PSIS measured bilaterally. In addition, side-to-side differences in the height of the innominate bone were recorded. The study found a range of values for the ASIS-PSIS of 0–23 degrees, with a mean of 13 and standard deviation of 5 degrees. Asymmetry of pelvic landmarks resulted in side-to-side differences of up to 11 degrees in ASISPSIS tilt and 16 millimeters in innominate height. These results suggest that variations in pelvic morphology may significantly influence measures of pelvic tilt and innominate rotational asymmetry
Paper Session III-A - Workforce 2000 and Its Education Implications for Space Organizations
The aerospace industry relies heavily on developing and implementing cutting-edge technology. To accomplish this, the industry needs employees whose education prepares them adequately for its tasks. There seem to be, therefore, two major workforce challenges facing the industry as it moves toward the year 2000:
1. Utilizing the present workforce
2. Preparing the future workforce
Aerospace companies are already matching the most highly qualified members of their workforces with unit functions. Those members who want to* continue to be valuable will need to krrp their skills and knowledge not only as current and specific to the job as possible but also braod enough to enable them to fill other assignments. \u27 Companies who want to keep their workforces compatible with their goals will need to continue and also to expand their variety of in-house training programs and incentives for outside educational opportunities
Paper Session I-D - The Physics Teaching Resource Agent Program - A Successful Nationwide Model that has Transformed the Learning and Teaching of Physics and Physical Science
The way physics and physical science are learned and taught in the United States has been transformed by the American Association of Physics Teachers through grants from the National Science Foundation (NSF). NSF considers the Physics Teaching Resource Agent (PTRA) program to be one of the most exemplary and far-reaching programs that it has ever funded. Since 1985 the PTRA program has trained nearly 400 secondary physics teachers who each has then trained hundreds of other teachers of physics and physical science through workshops, inservices, tried-and-proven classroom and lab teaching materials, and personal support.
PTRAs receive training in physics content, pedagogy, access to the latest in lab and computer-based materials and opportunities to share successful teaching techniques with other physics teachers as well as access to an established network of material and funds support and assistance from other PTRAs
Paper Session III-C - Students Describe how Education Should Prepare Them for the Future
A team of three Brevard County (Florida) secondary students will describe how they feel education should prepare them for the future. They will then indicate specific areas of knowledge and technology that would best support space-related careers.
The student presenters will be winners in the Technical Presentation Competition of the Brevard County SECME Regional Competition on 6 March 1999
Multilingual gendered identities: female undergraduate students in London talk about heritage languages
In this paper I explore how a group of female university students, mostly British Asian and in their late teens and early twenties, perform femininities in talk about heritage languages. I argue that analysis of this talk reveals ways in which the participants enact ‘culturally intelligible’ gendered subject positions. This frequently involves negotiating the norms of ‘heteronormativity’, constituting femininity in terms of marriage, motherhood and maintenance of heritage culture and language, and ‘girl power’, constituting femininity in terms of youth, sassiness, glamour and individualism. For these young women, I ask whether higher education can become a site in which they have the opportunities to explore these identifications and examine other ways of imagining the self and what their stories suggest about ‘doing being’ a young British Asian woman in London
Particle Acceleration in Relativistic Jets due to Weibel Instability
Shock acceleration is an ubiquitous phenomenon in astrophysical plasmas.
Plasma waves and their associated instabilities (e.g., the Buneman instability,
two-streaming instability, and the Weibel instability) created in the shocks
are responsible for particle (electron, positron, and ion) acceleration. Using
a 3-D relativistic electromagnetic particle (REMP) code, we have investigated
particle acceleration associated with a relativistic jet front propagating
through an ambient plasma with and without initial magnetic fields. We find
only small differences in the results between no ambient and weak ambient
magnetic fields. Simulations show that the Weibel instability created in the
collisionless shock front accelerates particles perpendicular and parallel to
the jet propagation direction. While some Fermi acceleration may occur at the
jet front, the majority of electron acceleration takes place behind the jet
front and cannot be characterized as Fermi acceleration. The simulation results
show that this instability is responsible for generating and amplifying highly
nonuniform, small-scale magnetic fields, which contribute to the electron's
transverse deflection behind the jet head. The ``jitter'' radiation (Medvedev
2000) from deflected electrons has different properties than synchrotron
radiation which is calculated in a uniform magnetic field. This jitter
radiation may be important to understanding the complex time evolution and/or
spectral structure in gamma-ray bursts, relativistic jets, and supernova
remnants.Comment: ApJ, in press, Sept. 20, 2003 (figures with better resolution:
http://gammaray.nsstc.nasa.gov/~nishikawa/apjweib.pdf
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