325 research outputs found
An investigation of students' perceptions and expectations of service delivery and service quality at an institution for higher education and training within a provincial government department in the Western Cape
Magister Commercii (Industrial Psychology) - MCom(IPS)The primary aim of this thesis was to undertake research in a Higher Education and Training Institution in a Provincial Government Department in the Western Cape to determine which variables affect the services that are being delivered and the quality of the services and how these services could be improved. The population selected for the purpose of the research was a large number of students at a Higher Education and Training Institution in a Provincial Government Department in the Western Cape. A research sample represented by a subset of participants from this organisation was selected. A biographical questionnaire and the SERVQUAL questionnaire were administered to a sample of 130 students enrolled at a Higher Education Institution in the Western Cape. The results indicate that there are significant relationships between selected biographical variables and perceptions of service quality. Moreover, there were also statistically significant differences in perceptions on the variables Reliability, Responsiveness, Assurance, Tangibles and Empathy. Tentative conclusions can be drawn from the results and recommendations regarding future research are highlighted.South Afric
Perturbative Scattering Phase Shifts in One-Dimension: Closed-form Results
A simple closed form expression is obtained for the scattering phase shift
perturbatively to any given order in effective one-dimensional problems. The
result is a hierarchical scheme, expressible in quadratures, requiring only
knowledge of the zeroth order solution and the perturbation potential.Comment: 10 pages in REVTe
Exact Semiclassical Evolutions in Relativistic and Nonrelativistic Scalar Quantum Mechanics and Quantum Cosmology
The necessary and sufficient conditions for the exactness of the
semiclassical approximation for the solution of the Schr\"odinger and
Klein-Gordon equations are obtained. It is shown that the existence of an exact
semiclassical solution of the Schr\"odinger equation determines both the
semiclassical wave function and the interaction potential uniquely up to the
choice of the boundary conditions. This result also holds for the Klein-Gordon
equation. Its implications for the solution of the Wheeler-DeWitt equation for
the FRW scalar field minisuperspace models are discussed. In particular, exact
semiclassical solutions of the Wheeler-DeWitt equation for the case of massless
scalar field and exponential matter potentials are constructed. The existence
of exact semiclassical solutions for polynomial matter potentials of the form
is also analyzed. It is shown that for p=1, 2 and 3,
right-going semiclassical solutions do not exist. A generalized semiclassical
perturbation expansion is also developed which is quite different from the
traditional and -expansions.Comment: Few minor correction
Semiclassical treatment of logarithmic perturbation theory
The explicit semiclassical treatment of logarithmic perturbation theory for
the nonrelativistic bound states problem is developed. Based upon
-expansions and suitable quantization conditions a new procedure for
deriving perturbation expansions for the one-dimensional anharmonic oscillator
is offered. Avoiding disadvantages of the standard approach, new handy
recursion formulae with the same simple form both for ground and exited states
have been obtained. As an example, the perturbation expansions for the energy
eigenvalues of the harmonic oscillator perturbed by are
considered.Comment: 6 pages, LATEX 2.09 using IOP style
The Grizzly, September 28, 1989
Berman Art Center Ready to Roll • New Forum Frontier to be Forged • Letter: Granite Windows Grosses Grad • Stern Happy at Ursinus • Bear Pack Run: Join Us! • Bush Wacked at Drug Dialog • Security New Park Patrol • Wellness Days! • Crutcher Leads Lady Bears to Win • Ursinus Nipped by WMC • Soccer: So-So • V-ball: Optimistic View • Athletes of the Week • Hallinger Competes on Wheels • Calliope Blast from Pasthttps://digitalcommons.ursinus.edu/grizzlynews/1242/thumbnail.jp
Immunohistochemical identification and quantitative analysis of cytoplasmic Cu/Zn superoxide dismutase in mouse organogenesis
Cytoplasmic Cu/Zn superoxide dismutase (SOD1) is an antioxidant enzyme that converts superoxide to hydrogen peroxide in cells. Its spatial distribution matches that of superoxide production, allowing it to protect cells from oxidative stress. SOD1 deficiencies result in embryonic lethality and a wide range of pathologies in mice, but little is known about normal SOD1 protein expression in developing embryos. In this study, the expression pattern of SOD1 was investigated in post-implantation mouse embryos and extraembryonic tissues, including placenta, using Western blotting and immunohistochemical analyses. SOD1 was detected in embryos and extraembryonic tissues from embryonic day (ED) 8.5 to 18.5. The signal in embryos was observed at the lowest level on ED 9.5-11.5, and the highest level on ED 17.5-18.5, while levels remained constant in the surrounding extraembryonic tissues during all developmental stages examined. Immunohistochemical analysis of SOD1 expression on ED 13.5-18.5 revealed its ubiquitous distribution throughout developing organs. In particular, high levels of SOD1 expression were observed in the ependymal epithelium of the choroid plexus, ganglia, sensory cells of the olfactory and vestibulocochlear epithelia, blood cells and vessels, hepatocytes and hematopoietic cells of the liver, lymph nodes, osteogenic tissues, and skin. Thus, SOD1 is highly expressed at late stages of embryonic development in a cell- and tissue-specific manner, and can function as an important antioxidant enzyme during organogenesis in mouse embryos
Global non-axisymmetric perturbation configurations in a composite disc system with an isopedic magnetic field: relation between dark matter halo and magnetic field
We study global non-axisymmetric stationary perturbations of aligned and
unaligned logarithmic spiral configurations in an axisymmetric composite
differentially rotating disc system of scale-free stellar and isopedically
magnetized gas discs coupled by gravity. The gas disc is threaded across by a
vertical magnetic field with a constant dimensionless isopedic ratio
of surface gas mass density
to with being the gravitational constant. Our
exploration focuses on the relation between and the dark matter
amount represented by a ratio in order to sustain
stationary perturbation configurations, where is the gravitational
potential of a presumed axisymmetric halo of dark matter and is the
gravitational potential of the composite disc matter. High and low
values correspond to relatively weak and strong magnetic fields given the same
gas surface mass density, respectively. The main goal of our model analysis is
to reveal the relation between isopedic magnetic fields and dark matter halo in
spiral galaxies with globally stationary perturbation configurations. Our
results show that, fairly strong yet realistic magnetic fields require a
considerably larger amount of dark matter in aligned and unaligned cases than
weak or moderate magnetic field strengths. We discuss astrophysical and
cosmological implications of our findings. For examples, patterns and pattern
speeds of galaxies may change during the course of galactic evolution.
Multiple-armed galaxies may be more numerous in the early Universe. Flocculent
galaxies may represent the transitional phase of pattern variations in
galaxies.Comment: 21 pages, 5 figures, accepted for publication in MNRA
Computational fluid dynamics modelling in cardiovascular medicine
This paper reviews the methods, benefits and challenges associated with the adoption and translation of computational fluid dynamics (CFD) modelling within cardiovascular medicine. CFD, a specialist area of mathematics and a branch of fluid mechanics, is used routinely in a diverse range of safety-critical engineering systems, which increasingly is being applied to the cardiovascular system. By facilitating rapid, economical, low-risk prototyping, CFD modelling has already revolutionised research and development of devices such as stents, valve prostheses, and ventricular assist devices. Combined with cardiovascular imaging, CFD simulation enables detailed characterisation of complex physiological pressure and flow fields and the computation of metrics which cannot be directly measured, for example, wall shear stress. CFD models are now being translated into clinical tools for physicians to use across the spectrum of coronary, valvular, congenital, myocardial and peripheral vascular diseases. CFD modelling is apposite for minimally-invasive patient assessment. Patient-specific (incorporating data unique to the individual) and multi-scale (combining models of different length-And time-scales) modelling enables individualised risk prediction and virtual treatment planning. This represents a significant departure from traditional dependence upon registry-based, populationaveraged data. Model integration is progressively moving towards 'digital patient' or 'virtual physiological human' representations. When combined with population-scale numerical models, these models have the potential to reduce the cost, time and risk associated with clinical trials. The adoption of CFD modelling signals a new era in cardiovascular medicine. While potentially highly beneficial, a number of academic and commercial groups are addressing the associated methodological, regulatory, education-And service-related challenges
The Interstellar Environment of our Galaxy
We review the current knowledge and understanding of the interstellar medium
of our galaxy. We first present each of the three basic constituents - ordinary
matter, cosmic rays, and magnetic fields - of the interstellar medium, laying
emphasis on their physical and chemical properties inferred from a broad range
of observations. We then position the different interstellar constituents, both
with respect to each other and with respect to stars, within the general
galactic ecosystem.Comment: 39 pages, 12 figures (including 3 figures in 2 parts
Bilateral benign renal oncocytomas and the role of renal biopsy: single institution review
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