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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Evolução do campo de dunas transgressivo da margem leste da Lagoa do Peixe, Litoral Médio do Rio Grande Do Sul, de 1948 a 2010

Hahn, Ana Rita Oliveira January 2015 (has links)
O presente estudo concerne à compreensão da evolução morfológica entre 1948 e 2010 no campo de dunas transgressivo da margem leste da lagoa do Peixe, situado no Parque Nacional da Lagoa do Peixe (PNLP), Rio Grande do Sul, Brasil, e à análise dos agentes responsáveis pelas transformações verificadas. O PNLP possui banhados, matas de restinga, lagoas de água doce e salobra e campos eólicos transgressivos, demandando proteção. A metodologia consistiu na análise de imagens aéreas, de 1948 e de 2001, e orbitais, de 2010, sendo todas manipuladas no software ArcGis®. Utilizaram-se, também, dados de precipitação de 1948 a 2010, obtidos do Global Precipitation Climatology Centre (GPCC), e de vento do período entre 1958 e 2000, da Marinha do Brasil, e de 2008 a 2014, do Instituto Nacional de Meteorologia (INMET), sendo gerados gráficos de anomalias de chuva e de direção, frequência e velocidade do vento. Constatou-se que o campo de dunas apresentava extensas cadeias transversais e barcanoides e baixa cobertura vegetal em 1948, evoluindo para cadeias barcanoides menores, barcanas isoladas, lençóis de areia, dunas parabólicas e bacias de deflação em 2001 e em 2010, além de áreas úmidas interdunas. Verificou-se um significativo incremento da pluviosidade anual e nos meses de novembro como resultado do aumento da frequência de eventos El Niño (ENOS), promovido pela fase quente da Oscilação Decenal do Pacífico (ODP) de 1977 até o início do século XXI, aumentando a cobertura vegetal e as áreas úmidas na área de estudo. Observaram-se modificações no padrão de ventos na região, o qual pode estar relacionado aos fatores climáticos, às mudanças na cobertura vegetal e ao uso do solo para a silvicultura. Os fatores responsáveis pelas mudanças morfológicas no campo eólico, portanto, correspondem ao incremento das chuvas e à presença da silvicultura, que reduziu o suprimento de areia e também afetou a morfologia local. / This study is about understanding the morphologic transformations occurred between 1948 and 2010 in the transgressive dunes field of Peixe lagoon’s east margin, situated in the Lagoa do Peixe National Park (LPNP), in Rio Grande do Sul State, Brazil, and analyzing which agents control these transformations. The LPNP has wetlands, sandbank woods, freshwater and brackishwater lagoons and transgressive dunefields that must be protected. The methodology was analyze aerial photographies of 1948 and 2001 and SPOT-5 satelitte images from 2010, and georeference them on ArcGis® software. It was found that the transgressive aeolian system showed morphologic transformations in the analyzed period, because it was identified many transversal and barchanoid ridges in 1948 which suffered reduction in current images, occurring the evolution of both into smaller barchanoid ridges, isolated barchan dunes, sand sheets, parabolic dunes, blowouts and wetlands on interdunes environments in 2001 and 2010. There was also an important increase in annual rainfall and in every November, because the El Niño events (ENOS) increased during the warm phase of the Pacific Decadal Oscillation (PDO), from 1977 to beginning of the 21th. This factor increased the vegetal covering and the wetlands on the dunes field. There were changes in the local wind pattern that can be related to climatic factors, variations in the vegetal covering and land use for silviculture. Thus, the factors that changed the morphology in the dunes field were the increasing of the rainfall and the silviculture that reduced the sand and also affected the local morphology.
22

Den fulaste tavlan : En undersökning av kontroversiell konst i vårdmiljö / The Ugliest Painting : A study on controversial art in a health care environment

Vedin, Sofi January 2017 (has links)
Decorative art is not a natural part of an health care environment to many people. Still it exists – in Sweden the county councils have some of the largest art collections in the country, and they are often the ones responsible for the art in hospitals, health centers and dentist offices in each county. This study is about the art in health care environments that is controversial – and why. With the help of interviews and a semiotic picture analysis, I will try to sort out what kind of paintings and pictures make people uncomfortable when viewed in a health care context.
23

Development of the radiography evidence base: An examination of advancing practice

Snaith, Beverly January 2013 (has links)
Radiography has seen most development over the last 30 years with the evolution of new technologies, but perhaps more significantly changes in education models and radiographer roles. The development of advanced and consultant posts has facilitated the growth of the profession, although the evidence base is still evolving. Through a number of research projects this thesis will explore the growth in the radiography evidence base with specific reference to the extending role of the radiographer in image interpretation. Parallel clinical and academic developments have provided evidence of a scholarly profession which is slowly establishing its place through publication and a growing research base. / Please Note: The full text of each of the published articles, which are listed on page vii, has been removed from the PhD online copy due to publisher copyright restrictions. Links to the publisher¿s websites are given. To see the final full text version of the articles listed on page vii, please visit the publisher¿s website. Available access to the published online version may require a subscription.
24

Methodological approaches to evaluating the practice of radiographers' interpretation of images: A review

Brealey, S., Scally, Andy J. January 2008 (has links)
Recent initiatives to modernise the National Health Service describe how improving pay structures and staff working lives can be achieved in the form of advanced practitioner and consultant posts. Role development in Radiography represents a fundamental change to professional practice of radiographers and is subject to the provisions of the statutory and professional codes of conduct which govern such practice. In Diagnostic Radiography the response to Government initiatives has led to a change in practice so that radiographers in these new posts provide reports for a variety of imaging modalities. At the same time as there have been changes in the practice of Radiography, the discipline of evidence-based medicine has emerged. Changes in clinical practice should be underpinned by evidence from research. The purpose of this paper is to discuss the methodological approaches used to conduct research that evaluates one of the most salient areas of development in Radiography practice, that is the role of radiographers as advanced or consultant practitioners when interpreting plain radiographs. We begin by discussing what an evaluation is and two broad approaches for conducting health services research, and then appraise the evidence about radiographer reporting in the context of these methods of evaluation. We then suggest future considerations about the methodological approaches to evaluating radiographer reporting practice and identify where there are evidence gaps and the need for further research to inform evidence-based Radiography.
25

Confidence Intervals and Sample Size Calculations for Studies of Film-reading Performance

Scally, Andy J., Brealey, S. January 2003 (has links)
The relaxation of restrictions on the type of professions that can report films has resulted in radiographers and other healthcare professionals becoming increasingly involved in image interpretation in areas such as mammography, ultrasound and plain-film radiography. Little attention, however, has been given to sample size determinations concerning film-reading performance characteristics such as sensitivity, specificity and accuracy. Illustrated with hypothetical examples, this paper begins by considering standard errors and confidence intervals for performance characteristics and then discusses methods for determining sample size for studies of film-reading performance. Used appropriately, these approaches should result in studies that produce estimates of film-reading performance with adequate precision and enable investigators to optimize the sample size in their studies for the question they seek to answer.
26

Presence of bias in radiographer plain film reading performance studies

Brealey, S., Scally, Andy J., Thomas, N. January 2002 (has links)
Purpose To raise awareness of the frequency of bias that can affect the quality of radiographer plain film reading performance studies. Methods Studies that assessed radiographer(s) plain film reading performance were located by searching electronic databases and grey literature, hand-searching journals, personal communication and scanning reference lists. Thirty studies were judged eligible from all data sources. Results A one-way analysis of variance (ANOVA) demonstrates no statistically significant difference (P=0.25) in the mean proportion of biases present from diagnostic accuracy (0.37), performance (0.42) and outcome (0.44) study designs. Pearson¿s correlation coefficient showed no statistically significant linear association between the proportion of biases present for the three different study designs and the year that the study was performed. The frequency of biases in film and observer selection and application of the reference standard was quite low. In contrast, many biases were present concerning independence of film reporting and comparison of reports for concordance. Conclusions The findings indicate variation in the presence of bias in radiographer plain film reading performance studies. The careful consideration of bias is an essential component of study quality and hence the validity of the evidence-base used to underpin radiographic reporting policy.
27

Double contrast barium enema. eLearning module

Culpan, Gary January 2013 (has links)
No / This session considers the double contrast barium enema examination (DCBE) in investigation of bowel pathology and discusses its place alongside other imaging modalities and alternative investigations. Tips on equipment use, technique and reporting will be offered.
28

Expanding training capacity for radiographer reporting using simulation: Evaluation of a pilot academy project

Harcus, J.W., Snaith, Beverly 05 July 2019 (has links)
Yes / Whilst there is increasing demand on radiology services in the UK, pressures are restricting the expansion of the multi-professional workforce. A pilot academy for radiography reporting was established to augment the traditional university and clinical education in a simulated environment using focussed teaching and real image worklists in a dedicated environment away from departments. Methods: Located at a facility to replicate the clinical reporting environment, the emphasis of the nine-month pilot was to provide extensive ‘hands-on’ training to eight trainees. Evaluation of the academy was undertaken through focus groups, telephone interviews, and online surveys to consider the experiences of the trainees and their managers and mentors. Results: There was overwhelming support for the academy from trainees, mentors, and managers. Key benefits included relieving pressures on department and mentors; providing an intense, structured, and safe environment to learn; and, perhaps most importantly, an extensive and cohesive peer-support network. Issues identified included conflict within departments due to differences in reporting style and the need for greater collaboration between the university, academy, and departments. Conclusion: The use of simulation in education is widely researched, however, there are a number of key factors that need to be considered when implementing it into practise. Peer-support and reflection is seen as essential for its success. Extensive dedicated time to focus on reporting alongside peers can support the development of these skills away from the clinical environment and as such can reduce pressure on service delivery and positively influence learner outcomes. / The pilot academy received funding from the NHS Vanguard scheme (Working Together NHS Vanguard) for purchase of equipment and the salaries of the clinical educator (pro-rata). The university fees and backfill payments were funded by Health Education England.
29

X-Radiography of Textiles, Dress and Related Objects.

O'Connor, Sonia A., Brooks, M.M. 18 November 2009 (has links)
No / X-radiography of textile objects reveals hidden features as well as unexpected components and materials. This non-destructive technique throws light on construction, manufacturing techniques, use, wear, repair, patterns of decay and dating. X-radiography improves artefact documentation and interpretation as well as guiding conservation approaches by enhancing understanding. This book explores techniques for X-raying textiles. It describes approaches to image interpretation and explains how, through digitisation and digital image manipulation, maximum information can be realised. Case studies include archaeological, ecclesiastical and ethnographic textiles, items of dress and accessories, upholstery, quilts, embroideries, dolls and toys. Museum professionals will find this stimulating book an essential guide for developing their own practice or commissioning textile X-radiographs.
30

Quantitative ultrasonography in regional anesthesia. / CUHK electronic theses & dissertations collection

January 2009 (has links)
Li, Xiang. / Thesis (Ph.D.)--Chinese University of Hong Kong, 2009. / Includes bibliographical references (leaves 161-184). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract and appendix also in Chinese.

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