135 research outputs found
McKeon retires from Graduate School, will still help train international teaching assistants
No full textDonald McKeon, of Blacksburg, director of the Graduate Teaching Assistant (GTA) Workshop and International Graduate Teaching Assistant (IGTA) Training, and international adviser in the Graduate School at Virginia Tech, is retiring after a long and distinguished career as a teacher, lecturer, author, and adviser
'Synthetic' Large Scale Motions Organize Small Scale Motions in the Turbulent Boundary Layer
No full textThe relationship between large- and small-scale motions in a non-equilibrium turbulent boundary layer was studied experimentally. A zero-pressure-gradient flat plate turbulent boundary layer was perturbed by a short array of two-dimensional roughness elements, both statically and under dynamic actuation. The dynamic forcing generated a `synthetic' very-large-scale motion (VLSM) within the flow which was observed by phase-locked flow measurements. The phase-relationship between both synthetic and natural VLSMs and the small scale motions within the boundary layer was studied by cross-correlation and cospectral techniques, to reveal an organizing effect of the artificial VLSM on smaller scales
An analysis of Margaret Sutherland's sonata for clarinet and piano (1947)
No full textDeposited with permission of the author. © 1984 Ian McKeon Morgan.The sonata for clarinet and piano by Margaret Sutherland has been selected as the subject for this thesis from a substantial list of sonatas by Australian composers. The choice was for two reasons: the sonata is the earliest surviving work for the combination and while not a major work, it is at least a substantial work by one of Australia’s most important composers. The work is written in a contemporary musical style, typical of its composer, so that it sounds fresh and musically challenging even in today’s musical environment
Chiropractic Management of Atypical Hard Palate Pain: A Case Report
No full textObjective: To illustrate the exploratory trial of therapy administered to a complaint of severe hard palate pain presenting to an outpatient chiropractic clinic, and the clinical agenda associated with the exhibited case. Clinical Features: A 76-year-old male presented with a 2-year history of hard palate pain centering just posteriorly to the left lateral incisor following an insidious onset. Upon examination, the pain was postulated to be of a neurologic nature; giving rise to a more nerve-related quality. The patient was previously seen by many healthcare providers regarding the complaint and subsequently presented to a chiropractic clinic for an impending trial of care. After developing a therapeutic framework based off the compiled evidence, a management plan was carried out for a total of 5 weeks
Living conditions and subjective well-being of farmers - An ordered response analysis of regional differences and changes over time
No full textThe liberalisation of trade with building down of tariffs and quotas, and with subsequently lower output prices, has enforced considerable structural changes in the agricultural sector. In Norway, both naturally given factors such as climate and topography, and social conditions such as a tradition for small family farms and strong governmental regulations, contribute in making this process even harder on the individual farmer. So how do the farmers respond? National farm statistics show that the amount of cultivated land stays approximately the same even though the number of farm units and agricultural employment falls annually. This implies that both farm size and productivity have increased. In this paper we utilise sample survey data on living conditions in agricultural households to examine whether we can observe changes in farmers ’experienced utility. Have contentment dropped and are there any obvious regional differences in contentment? The data consists of non-overlapping cross-sections for the years 1995 and 2002 and we make use of a standard ordered probability model in the estimations.
Spatiotemporal characteristics of uniform momentum zones: Experiments and modeling
No full textThe probability density function (PDF) of the instantaneous streamwise velocity has consistently been used to extract information on the formation of uniform momentum zones (UMZs) in wall-bounded flows. Its temporal evolution has previously revealed patterns associated with the geometry and amplitude of the underlying velocity fluctuations [Laskari and McKeon, J. Fluid Mech. 913, A6 (2021)0022-112010.1017/jfm.2020.1163]. In this paper, we examine the robustness of these patterns in a variety of data sets including experiments and wall-bounded flow models. Experimental data sets spanning a range of Reynolds numbers, with very long temporal and spatial domains, suggest that the rate of the observed temporal variations scales in inner units. The use of a convection velocity, uniform across heights, to transform space into time has a marginal effect on these features. Similarly, negligible effects are observed between internal and external geometries. Synthetic databases generated following the resolvent framework and the attached eddy model are employed to draw comparisons to the experimental databases. Our findings highlight the distinctive strengths of each: The broadband frequency input of the attached eddy model allows for a better statistical description as opposed to a narrow frequency input in the resolvent data sets; instantaneously, however, representative eddies are seen to lack some structural details leading to the observed temporal behavior, which is better replicated by resolvent modes. Overall, given the considerable variety of the input data tested, the agreement between the data sets highlights the robustness of the spatiotemporal characteristics of the examined UMZs. It also underpins the need for their proper inclusion in UMZ modeling from a statistical as well as an instantaneous viewpoint; the current analysis accentuates important performance indicators for both.Multi Phase System
The perceptions of post work placement students from DBS, DIT and WIT towards their work placement experience
No full textThe aim of this research paper is to understand how beneficial work placement experience is to those students that participate in it. There is much research into the benefits of internships but scant research examining the students’ level of satisfaction with their placement and there is also scant research on the career outcomes of the students after they have completed their work placement. There is also little research scrutinizing internships where the findings are empirically based.
Research data was taken from an online survey carried out on students that had completed a work placement in the last round of placements from DBS, DIT and WIT higher educational institutes. Four one-to-one interviews were also carried out with students that had completed placements. To strengthen the research, various journals and literature on internships were reviewed.
The research found that work placements are very beneficial to the students who participate in them. The majority of students are satisfied. They are afforded the opportunity to develop their skills. Their attitudes and expectations are also altered by the placement which ensures their career intentions are clarified and that they have clear expectations of the workplace. They feel they have an advantage over those that have not completed a work placement programme. Author keywords: work placement, internshi
Symplectic analysis of the two-dimensional Palatini action
No full textThe symplectic analysis, initiated by Faddeev and Jackiw, is applied to the first order (Palatini) form of the Einstein-Hilbert action in 1 + 1 dimensions. The constraints that arise are shown to result in the same gauge transformations that follow from the first class constraints occurring when the Dirac constraint formalism is applied to this action. Problems associated with gauge fixing are discussed.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Renormalization Group Summation with Heavy Fields
No full textThe summation of logarithmic contributions to perturbative radiative corrections in physical processes through use of the renormalization group equation has proved to be a useful way of enhancing the information one can obtain from explicit calculation. However, it has proved difficult to perform this summation when massive fields are present. In this note we point out that if the masses involved are quite large, the decoupling theorem of Symanzik and of Appelquist and Carazzone can be used to make the summation of logarithms possible.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
Radiative Corrections in 2+1 Dimensional Supergravity
No full textSupergravity in 2+1 dimensions has a set of first class constraints that result in two Bosonic and one Fermionic gauge invariances. When one uses Faddeev-Popov quantization, these gauge invariances result in four Fermionic scalar ghosts and two Bosonic Majorana spinor ghosts.The BRST invariance of the effective Lagrangian is found.As an example of a radiative correction, we compute the phase of the one-loop effective action in the presence of a background spin connection, and show that it vanishes. This indicates that unlike a spinor coupled to a gauge field in 2+1 dimensions, there is no generation of a topological mass in this model. The BRST invariance of the effective action for the Palatini action in 1+1 dimensions is found.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
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