1,445 research outputs found
Information technology and social cohesion : a tale of two villages
Acknowledgements This research was made possible by a grant from the EPSRC “Dot.Rural Digital Economy Hub” (EP/G066051/1) at the University of Aberdeen and EPSRC Communities and Culture Network+ (EP/K003585/1).Peer reviewedPostprin
Suggestions for Implementing First Year Experience Learning Communities in Teacher Education Programs
This article describes the creation of a First Year Experience learning community in a teacher education program. The First Year Experience model was adopted by the university because of declining enrollment, retention, and graduation rates and has been generally successful in the education department. With little information available for teacher educators about this type of learning community, we offer recommendations for implementing and evaluating them
The Ecstasy and Methamphetamine Drug Epidemics: Implications for Prevention and Control
This thesis is a review of the ecstasy and methamphetamine epidemics. It attempts to discern the differences between the two drug epidemics and compare the possible reasons why the ecstasy epidemic was somewhat limited while methamphetamine use continues to be a growing concern in many areas. Evidence for the epidemics, as well as the responses to the epidemics, will be discussed. This will include responses from local, state and federal government, communities, and the media. Prevention programs and treatment will also be addressed
Youth and Social Media in Transition
The Arab Transformations Project: WORK PACKAGE 8: D8.24 Acknowledgements This report was written as part of the Arab Transformations Research Project funded by the EU under Grant #320214. The authors would like to acknowledge Prof Pamela Abbott, Dr Andrea Teti, Dr Ilia Xypolia and Dr Vera Lomazzi for their feedback on earlier drafts of the report. The Arab Transformations Project is coordinated by the University of Aberdeen (UK) and includes further 11 partners: Dublin City University (DCU), Dublin, Ireland; Análisis Sociológicos Económicos y Políticos (ASEP), Madrid, Spain; Istituto per gli Studi di Politica Internazionale (ISPI), Milan, Italy; Universität Graz (UNI GRAZ), Graz, Austria; Societatea Pentru Methodologia Sondajelor Concluzia-Prim (Concluzia), Chisinau, Moldova; Centre de Recherche en Économie Appliquée pour le Développement (CREAD), Algiers, Algeria; Egyptian Centre for Public Opinion Research (BASEERA); Cairo, Egypt; Independent Institute for Administration and Civil Society Studies (IIACSS), Amman, Jordan; University of Jordan (JU), Amman, Jordan; MEDA Solutions (MEDAS), Casablanca, Morocco; Association Forum Des Sciences Sociales Appliquées (ASSF); Tunis, Tunisia.Publisher PD
Astrophysical Observations of a Dark Matter-Baryon Fifth Force
We consider the effects of an attractive, long-range Yukawa interaction
between baryons and dark matter (DM), focusing in particular on temperature and
pulsar timing observations of neutron stars (NSs). We show that such a fifth
force, with strength modestly stronger than gravity at ranges greater than tens
of kilometers (corresponding to mediator masses less than ), can dramatically enhance dark matter kinetic heating, capture, and
pulsar timing Doppler shifts relative to gravity plus short range interactions
alone. Using the coldest observed NS and pulsar timing array (PTA) data, we
derive limits on fifth force strength over a DM mass range spanning light dark
matter up to order solar mass composite DM objects. We also consider an
indirect limit by combining bullet cluster limits on the DM self-interaction
with weak equivalence principle test limits on baryonic self-interactions. We
find the combined indirect limits are moderately stronger than kinetic heating
and PTA limits, except when considering a DM subcomponent.Comment: 40 pages, 6 figures, v2: updated with analysis using another PTA
dataset, figures updated, conclusions unchange
Examining the impact of early longitudinal patient exposure on medical students’ career choices
Background: Medical schools include career direction experiences to help students make informed career decisions. Most experiences are short, precluding students from attaining adequate exposure to long-term encounters within medicine. We investigated the impact of the First Patient Program (FPP), which fosters longitudinal patient exposure by pairing junior medical students with chronically ill patients through their healthcare journey, in instilling career direction. Methods: Medical students who completed at least 6-months in the FPP participated in a cross-sectional survey. Students’ answers were analyzed with respect to the number of FPP appointments attended. Thematic analysis was conducted to explore qualitative responses.Results: One hundred and forty-eight students participated in the survey. Only 28 (19%) students stated that the FPP informed their career decisions. Thirty-nine percent of students who attended four or more appointments indicated that the FPP informed their career decisions, compared to 16% of students who attended less (p=0.021). Thematic analysis revealed two themes: 1) Students focused mainly on patient encounters within FPP; and 2) Students sought career directions from other experiences.Conclusion: The majority of students did not attain career guidance from the FPP, but rather used the program to understand the impact of chronic illness from the patient’s perspective
Macroscopic Dark Matter Detection with Gravitational Wave Experiments
We study signatures of macroscopic dark matter (DM) in current and future
gravitational wave (GW) experiments. Transiting DM with a mass of
kg that saturates the local DM density can be potentially
detectable by GW detectors, depending on the baseline of the detector and the
strength of the force mediating the interaction. In the context of laser
interferometers, we derive the gauge invariant observable due to a transiting
DM, including the Shapiro effect, and adequately account for the finite photon
travel time within an interferometer arm. In particular, we find that the
Shapiro effect can be dominant for short-baseline interferometers such as
Holometer and GQuEST. We also find that proposed experiments such as Cosmic
Explorer and Einstein Telescope can constrain a fifth force between DM and
baryons, at the level of strength times stronger than gravity for,
e.g., kg mass DM with a fifth-force range of m.Comment: 40 pages, 6 figure
Engineering Aerothermal Analysis for X-34 Thermal Protection System Design
Design of the thermal protection system for any hypersonic flight vehicle requires determination of both the peak temperatures over the surface and the heating-rate history along the flight profile. In this paper, the process used to generate the aerothermal environments required for the X-34 Testbed Technology Demonstrator thermal protection system design is described as it has evolved from a relatively simplistic approach based on engineering methods applied to critical areas to one of detailed analyses over the entire vehicle. A brief description of the trajectory development leading to the selection of the thermal protection system design trajectory is included. Comparisons of engineering heating predictions with wind-tunnel test data and with results obtained using a Navier- Stokes flowfield code and an inviscid/boundary layer method are shown. Good agreement is demonstrated among all these methods for both the ground-test condition and the peak heating flight condition. Finally, the detailed analysis using engineering methods to interpolate the surface-heating-rate results from the inviscid/boundary layer method to predict the required thermal environments is described and results presented
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