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Biological Effects of Low Dose Radiation from Computerized Tomography ScansAsis, Angelica 01 1900 (has links)
Humans have evolved under a field of low level radiation, and continue to be exposed
to ubiquitous levels from natural and man-made sources including diagnostic radiology. The
computerized tomography scan, in particular, plays an important role in the investigation of
disease and its use increased dramatically over the years. This raises the concern that
elevation in radiation exposure from x-ray modalities may increase an individual's risk for
cancer. The purpose of this study is to help address this issue by measuring biological
changes in lymphocytes before and after a CT scan. Venous blood was collected from eight
prostate cancer patient:> before and after their scan and delivered to McMaster University at
room temperature. For the dicentric assay, 0.5 ml whole blood/tube was irradiated with 3 Gy
gamma rays using a 0 ;137 source and then incubated at 37°C for 46 hours. Metaphases were
scored by microscopy. For apoptosis and y-H2AX, lymphocytes in media were irradiated on
ice with 8 Gy and analyzed by flow cytometry. Biological effects in vivo from the CT scan
were minimal for all endpoints when averaged between all donors. Overall, there was a high
degree of inter-individual variation for each effect, although no correlation was found
between dose (dose length product) from CT and apoptosis as well as the induction of yH2AX
foci. The adaptive response also showed patient variation, and the frequency of
dicentrics was the only endpoint that was lower overall following CT + 3Gy in comparison to
3 Gy alone. This research presents a challenge to current linear models of radiation
associated genetic risk, and shows that individuals respond to radiation differently depending
on biological factors. / Thesis / Master of Science (MSc)
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Detection of Over- and Under-reporting with the Computer Adaptive Version of the Minnesota Multiphasic Personality Inventory-2 (MMPI-2-CA)Dragon, Wendy Robinson 15 July 2008 (has links)
No description available.
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Network approach to impedance computerized tomographyDai, Hong January 1985 (has links)
No description available.
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Use of strategies for the comprehension and retention of nonfiction text in computer environmentsHolleran, Theresa Ann January 2003 (has links)
No description available.
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REGULATING HOSPITAL SOCIAL WORKERS AND NURSESO'Neill, Laura 04 1900 (has links)
<p>Canadian hospitals continue to adopt private sector strategies in an attempt to improve efficiency, accountability and quality. One such mandated efficiency is a computerized psychosocial assessment for mental health patients known as the Resident Assessment Instrument–Mental Health (RAI-MH). This thesis uses the RAI-MH as the gateway into exploring how neoliberal or private sector strategies are used to penetrate hospital care work resulting in the regulation and restructuring of work practices. The RAI-MH requires professionals to input specified, closed ended data about patients simplifying and narrowing their practice in an attempt to govern, measure and fund what is “value added” in the patient/professional encounter. This qualitative study uses interviews with social workers and nurses to examine the competing tensions experienced by professionals as they strive to provide client-centred care in a culture that promotes computer-centred care.</p> <p>My research findings reveal that the idealized portrayal of the 21<sup>st</sup> century knowledge worker is in sharp contrast to the realities faced by many increasingly standardized and “leaned-out” health care professionals. Social workers and nurses report that standardization leads to increasing surveillance. A few professionals comply with the increasing standardization or regulation but most found ways to resist while striving to maintain professional autonomy. As certain areas of work become standardized some professionals find ways to increase autonomy in other areas of their work. The findings reveal differences between those who engaged in work tasks outside of paid work hours (boundary crossings) and those who did not (boundary refusals). <strong></strong></p> <p>Theoretically, this thesis contributes to the literature by illuminating the processes involved within the rapidly changing organization of hospital service delivery. Substantively, it adds to the literature on understanding the work of service providers and how they continue to find creative ways to resist the standardization process.</p> / Doctor of Philosophy (PhD)
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Scoring Sentences Developmentally: An Analog of Developmental Sentence ScoringSeal, Amy 01 January 2002 (has links) (PDF)
A variety of tools have been developed to assist in the quantification and analysis of naturalistic language samples. In recent years, computer technology has been employed in language sample analysis. This study compares a new automated index, Scoring Sentences Developmentally (SSD), to two existing measures. Eighty samples from three corpora were manually analyzed using DSS and MLU and the processed by the automated software. Results show all three indices to be highly correlated, with correlations ranging from .62 to .98. The high correlations among scores support further investigation of the psychometric characteristics of the SSD software to determine its clinical validity and reliability. Results of this study suggest that SSD has the potential to compliment other analysis procedures in assessing the language development of young children.
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Carrying out electronic nursing documentation : use and development in primary health care /Törnvall, Eva, January 2008 (has links)
Diss. (sammanfattning) Linköping : Linköpings universitet, 2008. / Härtill 4 uppsatser.
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Non-linear behaviour of a Superconducting Quantum Interference Device coupled to a radio frequency oscillatorMurrell, Jonathan Kenneth Jeffrey January 2001 (has links)
No description available.
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Electronic characterisation and computer modelling of thin film materials and devices for optoelectronic applicationsZollondz, Jens-Hendrik January 2001 (has links)
No description available.
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Simulation of liquid crystals : disclinations and surface modificationDownton, Matthew January 2001 (has links)
No description available.
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