Dissertations / Theses on the topic 'Radiation in the perioperative environment'
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Berry, Judith. "Pressure ulcer prevention in the perioperative environment." Title page, table of contents and overview only, 2004. http://hdl.handle.net/2440/37709.
Full textThesis (D.Nurs.)--Department of Clinical Nursing, 2004.
Chadwick, Dorothy Lorraine. "What influences the practice of registered nurses in the perioperative environment? /." Thesis, University of Southampton, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582660.
Full textWuttke, Sigrid. "Radiation conditions in an Antarctic environment." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975820451.
Full textHill, Adam L. "NPS-SCAT CONOPS and Radiation Environment." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/7357.
Full textWhite, Ryan D. "A high-altitude nuclear environment simulation." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2315.
Full textSacchetti, Allegra. "Novel transparent and flexible transistors for radiation harsh environment." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9204/.
Full textTaylor, Benjamin Owen. "Radiation monitoring in the MEO environment with GIOVE-A." Thesis, University of Surrey, 2008. http://epubs.surrey.ac.uk/771934/.
Full textEhresmann, Bent [Verfasser]. "The Martian Radiation Environment - Early Mars and Future Measurements with the Radiation Assessment Detector / Bent Ehresmann." Kiel : Universitätsbibliothek Kiel, 2012. http://d-nb.info/1021342602/34.
Full textWahle, Peter Joseph 1961. "Radiation effects on power MOSFETs under simulated space radiation conditions." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277024.
Full textKöhler, Jan [Verfasser]. "Gamma, neutron separation in the Martian radiation environment / Jan Köhler." Kiel : Universitätsbibliothek Kiel, 2012. http://d-nb.info/1020284099/34.
Full textAmutkan, Ozge. "Space Radiation Environment And Radiation Hardness Assurance Tests Of Electronic Components To Be Used In Space Missions." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612238/index.pdf.
Full textRadiation Hardness Assurance&rdquo
. In this thesis, the hardening of electronics against space radiation is discussed. This thesis describes the space radiation environments, physical mechanisms, effects of space radiation, models of the space radiation environment, simulation of the Total Ionizing Dose, and &rdquo
Radiation Hardness Assurance&rdquo
which covers Total Ionizing Dose and Single Event Effects testing and analyzing of the electronics.
Murdock, Christopher Paul. "A study of '2'1'0Pb in the atmosphere and estuarine sedimentary environment." Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310584.
Full textMcClelland, Beverley. "Critical factors that influence staff retention in an acute perioperative environment a thesis in partial fulfilment of the degree in Master of Health Science at Auckland University of Technology, April 2004." Full thesis. Abstract, 2004. http://puka2.aut.ac.nz/ait/theses/McClellandB.pdf.
Full textErsmark, Tore. "Geant4 Monte Carlo Simulations of the International Space Station Radiation Environment." Doctoral thesis, Stockholm, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4007.
Full textHe, Jiaji. "Acoustic Waveguides and Sensors for High Temperature and Gamma Radiation Environment." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101870.
Full textDoctor of Philosophy
Sensing in harsh environments, like high temperature, high pressure, and corrosive environment, is always in great need. Efficient and safe operation of instruments like nuclear reactors could be better secured. Although many sensors and sensing systems are reported, such as optical fiber sensors and acoustic sensors, they all have drawbacks so new designs are constantly in need.newline In this dissertation, silica (a glass commonly acquired by melting sand) and sapphire (used in iphone screens due to its transparency and hardness) acoustic waveguides and sensors are developed. A periodic structure known as acoustic fiber Bragg grating (AFBG) is the core sensor structure in this dissertation. A calculation method is proposed first. Acoustic wave needs a waveguide to propagate somewhere further, and a new waveguide structure is made to keep the acoustic energy within the very center of the waveguide, so any change on the outer surface does not affect the wave inside. Also, sapphire has good acoustic property and is used. The AFBGs are fabricated in both waveguides. These sensing waveguides are shown to work at >1000 C temperature and provide stable reading for more than 10 days. Long term exposure to gamma radiation for weeks or months resulted in stable performances. Therefore, it is concluded that silica and sapphire waveguide sensors are successfully developed for high temperature and nuclear radiation applications.
Weaver, Bess A. "Solar Ultraviolet Radiation Exposure in Outdoor Work Environment at Bowling Green, Ohio." University of Toledo Health Science Campus / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=mco1211995092.
Full textCraven, Paul A. "The biological effectiveness of heavy ion radiations in the environment." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309835.
Full textBorrelli, Robert Angelo. "Characterization of Radioactivity in the Environment." Digital WPI, 1999. https://digitalcommons.wpi.edu/etd-theses/1085.
Full textMatthiä, Daniel [Verfasser]. "The radiation environment in the lower atmosphere : a numerical approach / Daniel Matthiä." Kiel : Universitätsbibliothek Kiel, 2010. http://d-nb.info/1019902434/34.
Full textUnderwood, Craig Ian. "Single event effects in commercial memory devices in the space radiation environment." Thesis, University of Surrey, 1996. http://epubs.surrey.ac.uk/743/.
Full textCampbell, Neil Scott. "A 'Monte Carlo' approach to thermal radiation distribution in the built environment." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243705.
Full textMountain, Keith Richard. "A clear sky net radiation model for the high elevation glacial environment /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681148542966.
Full textZainuddin, Efendi. "A study of background radiation in the environment in Perth, Western Australia." Thesis, Zainuddin, Efendi (1992) A study of background radiation in the environment in Perth, Western Australia. PhD thesis, Murdoch University, 1992. https://researchrepository.murdoch.edu.au/id/eprint/51650/.
Full textMedvedeva, Natalia Gennadievna. "Influence of cell environment on micronucleation in Chinese hamster ovary cells." Texas A&M University, 2004. http://hdl.handle.net/1969.1/2790.
Full textAcosta, Luis Roberto. "The attenuation of biologically active solar radiation (UV-B) in Mexico City environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21677.pdf.
Full textWalden, Aleksi. "SMOS satellite hardware anomaly prediction methods based on Earth radiation environment data sets." Thesis, Luleå tekniska universitet, Rymdteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59789.
Full textLizarrage, Adrian, Brittany Lynn, and Jeremiah Lange. "Remote Imaging System Acquisition (RISA) Space Environment Multispectral Imager." International Foundation for Telemetering, 2010. http://hdl.handle.net/10150/604306.
Full textThe purpose of the NASA Remote Imaging System Acquisition space camera prototype is to integrate multiple optical instruments into a small wireless system using radiation tolerant components. This stage of prototyping was the development of a broadband variable-focus camera that can transmit data wirelessly. A liquid lens in conjunction with a cerium doped double gauss eliminates traditional focusing mechanisms.
DALAQUA, JUNIOR LEONARDO. "Contribuicao para a aplicacao do detector Phoswich na analise de amostras ambientais." reponame:Repositório Institucional do IPEN, 1989. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9910.
Full textMade available in DSpace on 2014-10-09T14:09:03Z (GMT). No. of bitstreams: 1 03366.pdf: 1008030 bytes, checksum: 3c4f25e5172a0780c985f8c0dd3059a8 (MD5)
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
Jonsson, Ida, and Maria Åsdell. "Följsamhet till användning av strålskydd." Thesis, Umeå universitet, Institutionen för omvårdnad, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-115770.
Full textAims. Investigate the compliance with the use of radiation protection among perioperative personnel. Background. In the operating theatre interventions occurs in surgical procedures. Research has shown that X-ray radiation is harmful and there are guidelines describing how personnel should work for radiation safety. Few studies where found that shows whether personnel complies with the guidelines. Methods. The study is a cross-sectional study and a questionnaire was distributed in October 2015 to the perioperative personnel (n=69) working at two hospitals in Northern Sweden. Participants worked as theatre nurses, nurse anesthetists and enrolled nurse, and participated in surgical procedures where fluoroscopy occurred. The questionnaire consisted of 16 questions with both closed and open response options. Data were analyzed using SPSS 23.0. Chi-square test and Fisher's exact test was used for testing differences between professions. Results. The majority of participants reported that they often/ always used the apron during fluoroscopy. No significant difference in the use of apron and thyroid shield was found between professions. Significant difference was found in how the professions reported that they protect themselves at different surgical procedures. The majority of the participants reported good knowledge about radiation protection but still more than half wanted more education. Conclusion. Preventive work as recurrent education about radiation protection and radiation risks may reduce the risk of illness among perioperative staff. Results from the present study shows that the area needs to be explored more and this instrument can be used for a national survey.
Phillips, Stanley David. "Single event effects and radiation hardening methodologies in SiGe HBTs for extreme environment applications." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45854.
Full textAguilar, Alexa Christine. "Characterization of commercial step-down converter performance in the low Earth orbit radiation environment." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122403.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 87-95).
We characterize three commercial step-down DC-DC converters for the Low Earth Orbit (LEO) space radiation environment. Commercial space industry is shifting spacecraft design philosophy toward accepting more risk for shorter lead times, lower costs, and high instrument performance. This shift opens up the Commercial Off The Shelf (COTS) electronics market to space applications. To quantify the risks associated with using COTS parts, components must be tested in flight-like configurations and conditions and their response to environmental stresses characterized. Few data exist in literature on the performance of DC-DC converters in the space radiation environment despite their ubiquity in designs and key role in operation for which the alternative is prohibitively expensive. This thesis introduces the space radiation environment and resulting effects. We then model the environment for two LEO constellation configurations and determine the maximum expected radiation levels over the mission lifetime. These levels are then used to inform radiation tests. The DC-DC converters are Total Ionizing Dose (TID) and Single Event Effects (SEE) tested in radiation conditions representative of the LEO space radiation environment. These devices demonstrate radiation tolerance in both tests, with a minimum TID tolerance of 60 krad(Si) and experience no destructive latch-up behavior to about 90 MeV-cm²-mg⁻¹. A first order reliability analysis shows these parts introduce little additive risk to spacecraft design.
by Alexa Christine Aguilar.
S.M.
S.M. Massachusetts Institute of Technology, Department of Aeronautics and Astronautics
Mason, Sammuel P. "Atmospheric effects on radio frequency (RF) wave propagation in a humid, near-surface environment." Monterey, California : Naval Postgraduate School, 2010. http://edocs.nps.edu/npspubs/scholarly/theses/2010/Mar/10Mar%5FMason.pdf.
Full textThesis Advisor(s): Guest, Peter S. ; Goroch, Andreas K. "March 2010." Author(s) subject terms: Electromagnetic propagation, electromagnetic scattering, groundwave propagation, mathematical techniques, variance reduction. Includes bibliographical references (p. 67-68). Also available in print.
Avelin, Maria, and Linn Heimersson. "Operationssjuksköterskans omvårdnadsansvar i samband med röntgen vid operation." Thesis, Karlstads universitet, Institutionen för hälsovetenskaper (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-75917.
Full textIntroduction: When using X-ray in the operating room the patient is at risk of health care injury. It is required for the operating theatre nurse to be well informed and has the necessary skills to optimize X-ray use. Purpose: To highlight operating theatre nurses responsibility when using x-ray in surgery. Method: A literature study where scientific research articles was the source of information. The information has then been analyzed and categories and subcategories have been created. Result: Based on ten studies and presented in the form of two main categories and seven subcategories. The first main category ”Creating wellbeing for the patient” consists of the subcategories ”Awareness of the patients vulnerability”, ”Calm and secure environment” and ”Patient information”. The other main category ”Reduce risk of healthcare injury” consists of the subcategories ”Protect the patient”, ”Prepare the work”, ”Patients overall picture” and ”Reduce radiation”. Conclusion: The operating theatre nurse has the ability to influence the care when X-ray is used in surgery, but knowledge and insight about the responsibility is essential.
Alexander, Andrew William. "MMCTP : a radiotherapy research environment for Monte Carlo and patient-specific treatment planning." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101699.
Full textKrithivasan, Ramkumar. "Design of High-Speed SiGe HBT BiCMOS Circuits for Extreme Environment Applications." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14505.
Full textJessee, Emory Jerry. "Radiation ecologies: bombs, bodies, and environment during the atmospheric nuclear weapons testing period, 1942-1965." Diss., Montana State University, 2013. http://etd.lib.montana.edu/etd/2013/jessee/JesseeE0513.pdf.
Full textAndersson, Anton, and Birger Vaksdal. "Simulation of the Heavy Ion Contribution to the Radiation Environment onboard the International Space Station." Thesis, KTH, Fysik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-129324.
Full textOliver, Hannah Elizabeth. "The impacts of optical radiation in the environment on skin : hazards, measurement, regulation and protection." Thesis, Brunel University, 2006. http://bura.brunel.ac.uk/handle/2438/5329.
Full textFortkamp, Jonathan C. "Characterization of the radiation environment for a large area interim spent nuclear fuel storage facility /." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1488188894437725.
Full textTurnbull, David J. "Development of an improved shade environment for the reduction of personal UV exposure." University of Southern Queensland, Faculty of Sciences, 2005. http://eprints.usq.edu.au/archive/00001519/.
Full textNajafizadeh, Laleh. "Design of analog circuits for extreme environment applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31796.
Full textCommittee Chair: Cressler, John; Committee Member: Papapolymerou, John; Committee Member: Shen, Shyh-Chiang; Committee Member: Steffes, Paul; Committee Member: Zhou, Hao Min. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Larsson, Oscar. "Analysis of the Radiation Environment on Board the International Space Station Using Data from the SilEye-3/Alteino Experiment." Doctoral thesis, KTH, Partikel- och astropartikelfysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145339.
Full textQC 20140521
Lourenco, Nelson Estacio. "An assessment of silicon-germanium BiCMOS technologies for extreme environment applications." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45959.
Full textDartnell, Lewis R. "Computer modeling and experimental work on the astrobiological implications of the martian subsurface ionising radiation environment." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/14772/.
Full textLuscombe, Christopher James. "Exposure to ultraviolet radiation and susceptibilty to sporadic prostate cancer : a study of gene-environment interactions." Thesis, University of Birmingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288652.
Full textLohmeyer, Whitney Quinne. "Space radiation environment impacts on high power amplifiers and solar cells on-board geostationary communications satellites." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98682.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 273-292).
Communications satellite operators maintain archives of component telemetry to monitor system function. Operators generally do not typically use the telemetry data for scientific analysis of the space radiation environment effects on component anomalies or performance. We partnered with four geostationary (GEO) operators, acquired >1 million hours of telemetry, and combined these data with space weather observations to investigate relationships between space weather and hardware performance. We focused on the effects of space weather on two component types: solar cells and high power amplifiers. For solar cells, by augmenting >20 years of GEO telemetry with separate GEO space weather measurements, we calculated both on-orbit degradation of Si and GaAs solar cells in an annual average sense, and also quantified the degradation of cells during severe solar proton events (SPEs) of 10 MeV protons > 10,000 pfu. A functional relationship between the amount of degradation and proton fluence is also considered. We used the calculated degradation to evaluate several combinations of space weather environment models with solar cell degradation models and found that predicted performance is within 1% of the observed degradation. These models had not previously been validated using multiple on-orbit GEO datasets. We did not find a model pairing that consistently outperformed the others over all of the datasets. For high power amplifiers, through the use of statistical analysis, simulations, and electron beam experiments we conducted a root-cause analysis of solid state power amplifier (SSPA) anomalies on-board eight GEO satellites. From the statistical analysis, we identified that the occurrence of anomalies was not random with respect to the space weather environment, but that there appeared to be a relationship to high-energy electron fluence for periods of time between 10 - 21 days before the anomalies. From the simulations and electron beam lab tests, we demonstrated that internal charging occurs in the amplifier chain, potentially identifying a cause for the observed anomalies. We substantiated an approach toward understanding space weather effects on space components by obtaining and using long-duration archives of standard commercial telemetry for scientific analysis. The analysis of large telemetry data sets of similar components over long periods of time improves our ability to assess the role of different types of space weather events in causing anomalies and helps to validate models. The findings in this work that relate deep dielectric charging to component anomalies and solar proton events to solar cell degradation make use of only a small fraction of the potentially available commercial geostationary satellite telemetry. Expansion of this work would provide additional insights on the role of space weather to the science community and to the satellite design and operator community.
by Whitney Quinne Lohmeyer.
Ph. D.
Begg, Fiona H. "Anthropogenic '1'4C in the natural (aquatic) environment." Thesis, University of Glasgow, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300458.
Full textSecondo, Raffaello. "Upgrades of the RadMON V6 and its Integration on a Nanosatellite for theAnalysis and the Comparative Study of the CHARM and Low Earth Orbit Environments." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTS063/document.
Full textRadiation fields in the CERN accelerator complex are characterized by mixed particles with broad energy ranges. A Radiation Monitoring System, called "RadMon", was developed for the distributed, on-line measurement of the complex radiation fields and their effect on the electronics installed in areas with a harsh radiation environment. The most recent version of the RadMon revealed a critical issue soon after deployment in the tunnel and the experimental areas. Multiple Cell Upsets (MCUs) arising from microlatchup events started showing up on the SRAM-based particle flux sensors equipped by the system, ultimately affecting the measurement and resulting in corrupted data and accuracy losses. A study of the generation of this effect was performed, and a solution using an on-line detection and correction algorithm embedded on an FPGA, was evaluated and implemented on the RadMon device.Furthermore, in the framework of the project CELESTA, a feasibility study was carried out to validate the adaptation of the RadMon to a 1U CubeSat payload. The research was supported by the CERN Knowledge Transfer as a collaboration between the University of Montpellier, the Centre Spatial Universitaire and CERN. Experimental tests were performed at the new CHARM facility, which allows the characterization of small components, as well as large systems, in a mixed-field representative of the Low Earth Orbit.A stand-alone payload module for 1U CubeSats was developed and equipped withsensors of ionizing dose and high energy hadron fluence. In addition a Latchup Experiment was added on the module as part of the scientific goals of the mission. Results of experimental tests led to the definition of a new procedure for the radiation qualification of small satellites at system level. Details of the characterization and the choice of components are presented together with the approach followed.The payload is the first small satellite module ever designed at CERN. It representsthe first step of an increasing interest towards radiation qualification at CHARM of electronics for low orbit space missions
Thrivikraman, Tushar K. "SiGe BiCMOS phased-array antenna front-ends for extreme environment applications." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37141.
Full textWilcox, Edward. "Silicon-germanium devices and circuits for cryogenic and high-radiation space environments." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33850.
Full text