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Search Results: 1 - 10 of 167760 matches for " E. Humphreys "
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Representations of reduced enveloping algebras and cells in the affine Weyl group
James E. Humphreys
Mathematics , 2005,
Abstract: Let G be a semisimple algebraic group over an algebraically closed field of characteristic p>0, and let g be its Lie algebra. The crucial Lie algebra representations to understand are those associated with the reduced enveloping algebra U_chi(g) for a nilpotent chi in g*. We conjecture that there is a natural assignment of simple modules in a regular block to left cells in the affine Weyl group (for the dual root system) lying in the two-sided cell which corresponds to the orbit of chi in Lusztig's bijection. This should respect the action of the component group of C_G(chi) and fit naturally into Lusztig's enriched bijection involving the characters of C_G(chi). Some evidence will be described in special cases.
Analogues of Weyl's formula for reduced enveloping algebras
J. E. Humphreys
Mathematics , 2002,
Abstract: In this note we study simple modules for a reduced enveloping algebra U_chi(g) in the critical case when chi element of g^* is ``nilpotent''. Some dimension formulas computed by Jantzen suggest modified versions of Weyl's dimension formula, based on certain reflecting hyperplanes for the affine Weyl group which might be associated to Kazhdan--Lusztig cells.
Developing an educational framework for the teaching of simulation within nurse education  [PDF]
Melanie Humphreys
Open Journal of Nursing (OJN) , 2013, DOI: 10.4236/ojn.2013.34049

The use of simulations as a teaching and learning tool within health care has increasing importance; simulations are seen as the major teaching method for practicing and assessing developing skills, knowledge, attitudes and meaningful decision-making within the field of nursing. Certainly the utilisations of simulations feature widely within many aspects of health care; a greater understanding of the key conceptual notions will serve to benefit all of those engaged within their application. This literature review has enabled the construction of a conceptual model for the teaching of simulation and can serve to promote the continued positive development of simulations within education. Through a consistent and insightful approach to teaching, dynamic learning will be assured within this very important aspect of engaging the nursing student within the learning process.

Pain management among medical in-patients in Blantyre, Malawi
Adamson S Muula, Humphreys E Misiri
International Archives of Medicine , 2009, DOI: 10.1186/1755-7682-2-6
Abstract: A hospital-based audit was conducted to estimate the prevalence of pain and examine the quality of its management among patients admitted to adult medical wards at Queen Elizabeth Central Hospital (QECH), Blantyre, Malawi in 2004. Data were abstracted from ward charts of consecutive patients' who had been either been discharged or had died within a specified period. Characteristics of interest included; socio-demographic data, presence or absence of pain at admission, characterization or description of pain when present, and drug treatment given. Data were analyzed to obtain frequencies and proportions of the characteristics and assess the prevalence of pain and quality of care.A total of 121 patients' case notes were reviewed and the prevalence of pain was recorded for 91 (75.2%) of the patients. Clinicians had recorded pertinent information regarding pain management with the following frequency: pain severity or intensity 5/91 (5.5%), alleviating factors 5 (5.5%), pain radiation 7 (7.7%), exacerbating factors in 9 (9.9%) and periodicity in 43 (47.3%) of the cases. Males with pain were more than 3 times more likely to receive analgesic as compared to females, p < 0.01. Paracetamol was the commonest analgesic prescribed.Inadequate management of pain among patients attending medical wards at QECH was found. There is need for prospective studies to further characterize pain management and identify pain management gaps in Malawi. Interviews of clinicians and documentation of observations within clinical practice are likely to be of value.Pain is a common medical symptom prompting patients to seek care. However adequate management of pain remains a global challenge. In 1982, the World Health Organization (WHO) recognized inadequate management of (cancer) pain as an international health problem [1]. While cancer pain management has certainly received some attention however, pain experienced during childbirth, that arising from infectious diseases, in post-surgical care a
Physical trauma experience among school children in periurban Blantyre, Malawi
Adamson S Muula, Humphreys E Misiri
International Archives of Medicine , 2009, DOI: 10.1186/1755-7682-2-20
Abstract: A cross sectional questionnaire study was carried out among school children in Ndirande-Blantyre, Malawi in 2004. Data were obtained to describe the following aspects of trauma experience: being a victim or observer of motor vehicular accidents involving pedestrians; history of falls from heights; and knowledge about road safety. Sex differences were determined for some of the variables in order to gain insights as to whether there is a difference in trauma experience between boys and girls.A total of 217 school children, 99 (45.6%) boys and 118 (54.4%) girls participated in the study. Eight of them reported to have ever been hit by a motor vehicle, 87 (40.1%) had witnessed a road accident where a pedestrian had been hit and 83 (38.2%) had witnessed a pedestrian they knew having been hit by a motor vehicle. Of those that reported to have ever been hit by motor vehicle, 2 (25%) reported that they had been hospitalized as a result of injury. With regard to falling from heights, 86 reported to have ever fallen from tree, 44 of these (51.2%) were injured from the fall and 14 (16.3%) were hospitalized as a result of injury sustained from the fall. Girls were more likely to fall from trees and getting injured as compared to males (p = 0.04 for both situations). Just under half (41.9%) of the study participants were able to report the correct procedure of crossing the road despite the fact that the majority (80%) reported having been taught road safety at home or school.Many school children in Blantyre, Malawi have been exposed to trauma either involving themselves or someone they observed. Prevention, including education, supervision and management of trauma must receive the necessary attention they deserve in terms of resources, surveillance and impact mitigation.Physical trauma is an important international public health problem and contributes significantly to the global burden of disease [1]. Non-fatal injuries occur among 10–30 million children and adolescents each y
School children\'s accessibility to insecticide-treated bednets in peri-urban Blantyre, Malawi
Adamson S Muula, Humphreys E Misiri
African Journal of Health Sciences , 2004,
Abstract: Malaria is a major cause of childhood morbidity and mortality in Malawi. Use of insecticide treated bed nets (ITNs) could reduce the burden of malaria. The objective of the study was to determine the general health status, and factors that influence reported access to ITNs among school children in a peri-urban area of Blantyre, Malawi. 454 school children participated in the study of which 253 (55.7%) were males and 201 (44.3%) females. Their mean age and range were 14 years (std. deviation, 1.4 years) and 10-19 years respectively. When asked about general health status questions, 263 (57.9%) reported ever having fallen ill while at school, 41.2% having ever came to school knowing they were unwell, and 40.7% of those that reported having fallen ill at school, categorized their illness as malaria. Regarding illness in the month preceding the study, 41.0% indicated that they had been ill. 40 (8.8%) participants reported that they were not allowed by their religious denominations to use medications when ill. 165 (36.3%) participants reported using bed nets themselves, 159 (35.0%) had a household member (other than parent) using nets and 254 (55.9%) had parent(s) sleeping under an ITN. Having someone in the household who uses an ITN was positively associated with ITN use while age of the participants was inversely associated with ITN access in the home. While more females (37.3%) reported using nets than males (35.6%), the difference was not statistically significant (p=0.7). It was concluded that many of the school children experience ill health in Ndirande, Malawi and malaria is perceived to be a common illness. While younger children seem to have higher access to ITNs, there seems to be no statistically significant gender differences in accessibility. African Journal of Health Sciences Vol. 11(3-4) 2004: 98-102
The Role of Medical Language in Changing Public Perceptions of Illness
Meredith E. Young, Geoffrey R. Norman, Karin R. Humphreys
PLOS ONE , 2008, DOI: 10.1371/journal.pone.0003875
Abstract: This study was designed to investigate the impact of medical terminology on perceptions of disease. Specifically, we look at the changing public perceptions of newly medicalized disorders with accompanying newly medicalized terms (e.g. impotence has become erectile dysfunction disorder). Does using “medicalese” to label a recently medicalized disorder lead to a change in the perception of that condition? Undergraduate students (n = 52) rated either the medical or lay label for recently medicalized disorders (such as erectile dysfunction disorder vs. impotence) and established medical conditions (such as a myocardial infarction vs. heart attack) for their perceived seriousness, disease representativeness and prevalence. Students considered the medical label of the recently medicalized disease to be more serious (mean = 4.95 (SE = .27) vs. mean = 3.77 (SE = .24) on a ten point scale), more representative of a disease (mean = 2.47 (SE = .09) vs. mean = 1.83 (SE = .09) on a four point scale), and have lower prevalence (mean = 68 (SE = 12.6) vs. mean = 122 (SE = 18.1) out of 1,000) than the same disease described using common language. A similar pattern was not seen in the established medical conditions, even when controlled for severity. This study demonstrates that the use of medical language in communication can induce bias in perception; a simple switch in terminology results in a disease being perceived as more serious, more likely to be a disease, and more likely to be a rare condition. These findings regarding the conceptualization of disease have implications for many areas, including medical communication with the public, advertising, and public policy.
Medicine in the Popular Press: The Influence of the Media on Perceptions of Disease
Meredith E. Young, Geoffrey R. Norman, Karin R. Humphreys
PLOS ONE , 2008, DOI: 10.1371/journal.pone.0003552
Abstract: In an age of increasing globalization and discussion of the possibility of global pandemics, increasing rates of reporting of these events may influence public perception of risk. The present studies investigate the impact of high levels of media reporting on the perceptions of disease. Undergraduate psychology and medical students were asked to rate the severity, future prevalence and disease status of both frequently reported diseases (e.g. avian flu) and infrequently reported diseases (e.g. yellow fever). Participants considered diseases that occur frequently in the media to be more serious, and have higher disease status than those that infrequently occur in the media, even when the low media frequency conditions were considered objectively ‘worse’ by a separate group of participants. Estimates of severity also positively correlated with popular print media frequency in both student populations. However, we also see that the concurrent presentation of objective information about the diseases can mitigate this effect. It is clear from these data that the media can bias our perceptions of disease.
First SIMBA observations toward CH3OH masers
M. R. Pestalozzi,E. M. L. Humphreys,R. S. Booth
Physics , 2002,
Abstract: We report SIMBA 1.2 mm dust continuum observations of the environments of eight methanol maser sources, all discovered during spatially fully-sampled, untargeted surveys of the galactic plane. We summarise our search for possible associations of the masers with IR sources (IRAS and MSX) and find that it is not always possible to make definite associations. A preliminary characterisation of the IR sources found in the maser neighbourhood is given according their position in the [60-25] -- [25-12] colour-colour diagram.
A Mixed Basis Approach for the Efficient Calculation of Potential Energy Surfaces
O. Gulseren,D. M. Bird,S. E. Humphreys
Physics , 1997,
Abstract: First principles calculations based on density functional theory are having an incerasing impact on our understanding of molecule-surface interactions. For example, calculations of the multi-dimensional potential energy surface have provided considerable insight into th edynamics of dissociation processes. However, these calculations using a plane-wave basis set are very compute expensive if they are to be fully converged with respect to the plane-wave energy cutoff, k-point sampling, supercell size, slab thickness, etc. Because of this, in this study, we have implemented a mixed-basis set approach which uses pseudo-atomic orbitals and a few low-energy plane waves as the basis set within a density functional, pseudopotential calculation. We show that the method offers a computationally cheap but accurate alternative. The energy barrier for hydrogen dissociation on Cu(111) is calculated as an example.
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