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Dissertations / Theses on the topic 'Cold temperatures'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Johns, Christopher Alan. "Intrinsic bioremediation of hydrocabons at cold temperatures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/MQ47046.pdf.

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2

Mullick, Anjum. "Intrinsic bioremediation of chlorinated hydrocarbons at cold temperatures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/MQ47074.pdf.

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3

Ibitoye, SA, AA Adeleke, AO Tiamiyu, APL Popoola, and AA Afonja. "Response of cold briquetted IRon (CBI) to high temperatures treatment." Journal of Mining and Metallurgy, 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000467.

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This investigation was carried out to assess the behaviours of Cold Briquetted Iron (CBI) when exposed to increasing temperature changes up to its complete melting. High-temperature behaviours and melting characteristics of CBI were studied. Ground as-received CBI briquette and those heated to temperatures ranging from 500°C to 1000°C were sieved to maximum of 30 microns diameter size and their room-temperature x-ray diffraction (XRD) measured. CBI was found to contain among others, α-iron, cementite and silica phases. Cementite was found to commence decomposition at 500°C - 600°C and complete

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4

Delatolla, Robert. "Nitrifying biofilms at cold temperatures: kinetics and in-situ characterization." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32550.

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The biological process of nitrification is currently the most economical and commonly employed means of removing ammonia from wastewater. Although nitrification is cost-effective and has been used in many treatment facilities in North America, the temperature sensitivity of suspended growth nitrifying bacteria is of considerable concern when designing wastewater treatment facilities in many North American cities. Notwithstanding the limited ability of suspended growth treatment systems to achieve nitrific

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5

Hogan, Kyla B. "The hemostatic responses to exercise in hot and cold temperatures." Virtual Press, 2008. http://liblink.bsu.edu/uhtbin/catkey/1398717.

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Purpose: The impact of temperature on the coagulative response to exercise has not been well described. The purpose of this study was to assess the response of plasma thrombin-antithrombin (TAT) to exercise during exposure to both hot and cold temperatures, and to compare those responses to exercise under normal, temperate conditions. Methods: Fifteen healthy male subjects (25.3 + 4.3 years) volunteered to participate in this study. Subjects completed maximal cycle ergometer exercise tests in three different temperatures (20°C, 5° or 8° C, and 30°C) in an environmental chamber. All tests were

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6

Yong, Pei Ming. "Collapse Behaviour of Cold-Formed Steel Structure at Elevated Temperatures." Thesis, Curtin University, 2018. http://hdl.handle.net/20.500.11937/75245.

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This thesis describes a full-scale fire test and finite-element (FE) modelling carried out on a cold-formed steel structure. The structure was collapsed with an inwards asymmetrical collapse mechanism. The FE model was validated against the full-scale fire test results where the comparison shows that the FE results were in good correlation with the full-scale fire test results. The results presented in this thesis can contribute to practical design guidance for fire safety engineering.

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7

Bonthron, Björn, and Christian Jonsson. "Geogrids in cold climate : Temperature controlled tensile tests & Half-scale installation tests at different temperatures." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-63204.

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Due to the findings of extensive damage on geogrids used in a road embankment in northern Sweden, the Swedish Transport Administration (TRV) started to investigate the reason of these damages. Since the geogrids were installed at low temperature, below 0°C, it was suspected that the damages were connected the low temperature. To analyse whether low temperatures have an influence on the extent of installation damages, both a half-scale setup and temperature controlled tensile tests have been carried out on geogrids. In total five different types of geogrids have been tested; 3 extruded polyprop

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8

Giles, Tom. "Gene regulatory networks for wheat genotype-dependent effects of cold temperatures." Thesis, University of Nottingham, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.576493.

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Understanding and optimising the response of crops to climate change is of central importance in enhancing food security. A better understanding of how wheat genes influence traits is required to allow breeders to respond to socioeconomic issues. One aspect concerns adjusting flowering phenotypes to match predicted future climates. It is therefore crucial to understand this vernalisation process. The identification of the genes involved in the vernalisation response will be important for breeding crops able to cope with the effects of climate change. In this research project, bioinformatics me

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9

Schoene, Elizabeth A. 1979. "Cold atom control with an optical one-way barrier." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11067.

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xvi, 176 p. : ill. (some col.)<br>The research presented in this dissertation aims to contribute to the field of atom optics via the implementation and demonstration of an all-optical one-way barrier for 87 Rb atoms--a novel tool for controlling atomic motion. This barrier--a type of atomic turnstile--transmits atoms traveling in one direction but hinders their passage in the other direction. We create the barrier with two laser beams, generating its unidirectional behavior by exploiting the two hyperfine ground states of 87 Rb. In particular, we judiciously choose the frequency of one beam to

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10

Franke, Jürgen Otto. "Cold climate composting, the influences of sub-zero ambient and ventilating temperatures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq22595.pdf.

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11

Bilgen, Tolga. "Differential gene expressionin two cold hardy insects in response to low temperatures." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ37042.pdf.

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12

Johnston, Ross Patrick David. "Behaviour of cold-formed steel portal frames at ambient and elevated temperatures." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.679247.

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This thesis is concerned with the design development of cold-formed steel portal frames at both ambient and elevated temperatures. A full-scale site test was carried out to determine the behaviour in fire, of a portal frame structure comprised entirely from cold-formed steel. Laboratory component tests were used to investigate joint behaviour at ambient temperature. Numerical modelling was used to extend the investigations without the need for further physical testing. Good agreement between the experimental tests and non-linear finite element (NLFEA) models was obtained. The finite element mo

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13

Ranawaka, Thanuja. "Distortional buckling behaviour of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2006. https://eprints.qut.edu.au/16417/6/Thanuja_Ranawaka_Thesis.pdf.

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In recent times, light gauge cold-formed steel sections have been used extensively in residential, industrial and commercial buildings as primary load bearing structural components. This is because cold-formed steel sections have a very high strength to weight ratio compared with thicker hot-rolled steel sections, and their manufacturing process is simple and cost-effective. However, these members are susceptible to various buckling modes including local and distortional buckling and their ultimate strength behaviour is governed by these buckling modes. Fire safety design of building st

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14

Ranawaka, Thanuja. "Distortional buckling behaviour of cold-formed steel compression members at elevated temperatures." Queensland University of Technology, 2006. http://eprints.qut.edu.au/16417/.

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In recent times, light gauge cold-formed steel sections have been used extensively in residential, industrial and commercial buildings as primary load bearing structural components. This is because cold-formed steel sections have a very high strength to weight ratio compared with thicker hot-rolled steel sections, and their manufacturing process is simple and cost-effective. However, these members are susceptible to various buckling modes including local and distortional buckling and their ultimate strength behaviour is governed by these buckling modes. Fire safety design of building st

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15

Heva, Yasintha Bandula. "Behaviour and design of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/29310/1/Yasintha_Heva_Thesis.pdf.

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Cold-formed steel members have been widely used in residential, industrial and commercial buildings as primary load bearing structural elements and non-load bearing structural elements (partitions) due to their advantages such as higher strength to weight ratio over the other structural materials such as hot-rolled steel, timber and concrete. Cold-formed steel members are often made from thin steel sheets and hence they are more susceptible to various buckling modes. Generally short columns are susceptible to local or distortional buckling while long columns to flexural or flexural-torsional b

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16

Dolamune, Kankanamge Nirosha. "Structural behaviour and design of cold-formed steel beams at elevated temperatures." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/33221/1/Nirosha_Dolamune_Kankanamge_Thesis.pdf.

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Cold-formed steel members are extensively used in the building construction industry, especially in residential, commercial and industrial buildings. In recent times, fire safety has become important in structural design due to increased fire damage to properties and loss of lives. However, past research into the fire performance of cold-formed steel members has been limited, and was confined to compression members. Therefore a research project was undertaken to investigate the structural behaviour of compact cold-formed steel lipped channel beams subject to inelastic local buckling and yieldi

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17

Bardot, Leon. "Explosive volcanism on Santorini : palaeomagnetic estimation of emplacement temperatures of pyroclastics." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360162.

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18

Mahenthirarasa, Rokilan. "Cold-formed steel compression members exposed to extreme temperature environments." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/226125/1/Rokilan_Mahenthirarasa_Thesis.pdf.

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This thesis investigated the behaviour of cold-formed steel compression members under extreme temperature environments using experimental and numerical studies. It proposed both new and improved design models for (1) the elevated and sub-zero temperature mechanical properties of cold-formed steels and (2) the compression capacities of cold-formed steel members exposed to uniform and non-uniform elevated temperatures and uniform sub-zero temperatures. The proposed design models are likely to be adopted by the Australian and American cold-formed steel structures standards, while the new knowledg

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19

Jonsson, Anton, and Sandra Hedman. "Moderately cold indoor temperatures’ effect on human attention:Immediate decrease in inhibiting erroneous responses." Thesis, Umeå universitet, Institutionen för psykologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-149550.

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The aim of the study was to investigate whether a moderately cold indoor temperature, 15.5+- °C, has a negative effect on human attention. This was investigated in an experiment where 40 participants (18 women, M = 23.5 years, age range 20–33 years) partook in three commonly used attention demanding cognitive tests, where half of the participants were tested in a normal room temperature environment around 20+-1 °C and the remaining participants in a cooler temperature of 15.5+-2 °C. The three tests that were used were the Stroop Test, Trail Making Test A and B as well as the Dot Cancellation T

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20

Junge, Karen. "Bacterial abundance, activity, and diversity at extremely cold temperatures in Arctic sea ice /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/10980.

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21

Cai, Yancheng, and 蔡炎城. "Bolted connections of cold-formed stainless steel at elevated temperatures and post-fire condition." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/196034.

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The structural behaviour of single shear bolted connections and double shear bolted connections of cold-formed stainless steel at elevated temperatures and post-fire condition has been investigated in this study. The current design rules on bolted connections of cold-formed stainless steel are mainly based on those of carbon steel, and are applicable for room (ambient) temperature condition only. These design rules may not be applicable for elevated temperatures. Therefore, design guidelines should be prepared for bolted connections of cold-formed stainless steel structures at elevated tempera

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22

Lee, Jung Hoon. "Local buckling behaviour and design of cold-formed steel compression members at elevated temperatures." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15972/1/Jung_Hoon_Lee_Thesis.pdf.

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The importance of fire safety design has been realised due to the ever increasing loss of properties and lives caused by structural failures during fires. In recognition of the importance of fire safety design, extensive research has been undertaken in the field of fire safety of buildings and structures especially over the last couple of decades. In the same period, the development of fire safety engineering principles has brought significant reduction to the cost of fire protection. However the past fire research on steel structures has been limited to heavier, hot-rolled structural steel me

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23

Lee, Jung Hoon. "Local buckling behaviour and design of cold-formed steel compression members at elevated temperatures." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15972/.

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The importance of fire safety design has been realised due to the ever increasing loss of properties and lives caused by structural failures during fires. In recognition of the importance of fire safety design, extensive research has been undertaken in the field of fire safety of buildings and structures especially over the last couple of decades. In the same period, the development of fire safety engineering principles has brought significant reduction to the cost of fire protection. However the past fire research on steel structures has been limited to heavier, hot-rolled structural steel me

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24

Ye, Xiaofang. "The effects of hot and cold temperatures on emergency hospital admissions in Brisbane, Australia." Thesis, Queensland University of Technology, 2013. https://eprints.qut.edu.au/63667/1/Xiaofang_Ye_Thesis.pdf.

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As Earth's climate is rapidly changing, the impact of ambient temperature on health outcomes has attracted increasing attention in the recent time. Considerable number of excess deaths has been reported because of exposure to ambient hot and cold temperatures. However, relatively little research has been conducted on the relation between temperature and morbidity. The aim of this study was to characterize the relationship between both hot and cold temperatures and emergency hospital admissions in Brisbane, Australia, and to examine whether the relation varied by age and socioeconomic factors.

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25

Santos, Paula Cristina Bento Batista dos. "Molecular responses of Coffea spp. tolerance to low non-freezing temperatures." Doctoral thesis, ISA/UTL, 2010. http://hdl.handle.net/10400.5/3864.

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Doutoramento em Biologia - Instituto Superior de Agronomia<br>Low positive temperatures are of up most importance in tropical plant species, namely in Coffea spp., disturbing plant growth and metabolism, with impact on photosynthesis and yield. An integrated biochemical and molecular approach was used to analyze the cold impact and tolerance ability on photosynthesis of coffee plants, linked to modifications of the status of the antioxidative system, and chloroplast membrane lipids. Five coffee genotypes with contrasting cold sensitivity were used: Coffea canephora cv. Apoatã, C. arabica

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26

Summers, Heidi A. "Calorespirometric Evidence for Adaptation of Blackbrush and Shadscale to Growth Season Temperatures in Cold Deserts." Diss., BYU ScholarsArchive, 2005. http://contentdm.lib.byu.edu/ETD/image/etd693.pdf.

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27

Zaabri, Maha. "Equilibrium partitioning and bioavailability of aromatic hydrocarbons from non-aqueous phase liquids at cold temperatures." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82646.

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This research investigated how cold temperatures affect oil/water partitioning of two commonly encountered aromatic hydrocarbon pollutants, naphthalene and benzene. Although it is generally assumed that equilibrium concentrations of organic solutes decrease with temperature, there is little data on oil-water partitioning coefficients of environmentally significant solutes or methodology description for the calculation of such coefficients. Partitioning experiments showed that equilibrium aqueous concentrations were found to depend largely on a single compound property, the excess heat o

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28

Efthymiou, Petros. "An optical investigation of DISI engine combustion, fuel spray and emissions at cold-start temperatures." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/19486.

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Particulate number (PN) standards in current and future emissions legislation pose a challenge for designers and calibrators during the warm-up phases of cold direct injection spark ignition (DISI) engines. To achieve catalyst light-off conditions in the shortest time, engine strategies are often employed that inherently use more fuel to attain higher exhaust temperatures. These can lead to the generation of locally fuel-rich regions within the combustion chamber and hence the formation and emission of particulates. To meet these emissions requirements, further understanding of the DISI in-cyl

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29

Burke, Genola. "The molecular identification and evaluation of the effects of cold temperatures on Antarctic Pseudomonas spp." Birmingham, Ala. : University of Alabama at Birmingham, 2009. https://www.mhsl.uab.edu/dt/2009m/burke.pdf.

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30

Zhang, Feng 1962 Aug 29. "Soybean symbiotic signal exchange, nodulation, and nitrogen fixation under suboptimal root zone temperatures." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40295.

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In the N$ sb2$ fixing legume symbiosis, suboptimal root zone temperatures (RZTs) not only decrease N$ sb2$ fixation. but reduce the formation and development of nodules. The purpose of this thesis was to elucidate the mechanism by which suboptimal RZTs affect nodulation and nodule development in legumes, such as soybean (Glycine max (L.) Merr.) and to attempt to find ways to overcome this inhibition. Initial studies characterized the RZT response in soybean plants inoculated with Bradyrhizobium japonicum. In plants grown at RZTs from 25 to 17$ sp circ$C, the time between soybean inoculation wi

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31

Nathanailidis, Cosmas. "Muscle growth, development and enzyme activity in cold and warm water fish species exposed to different temperatures." Thesis, Royal Veterinary College (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522698.

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32

Cheng, Shanshan. "Fire performance of cold-formed steel sections." Thesis, University of Plymouth, 2015. http://hdl.handle.net/10026.1/3316.

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Thin-walled cold-formed steel (CFS) has exhibited inherent structural and architectural advantages over other constructional materials, for example, high strength-to-weight ratio, ease of fabrication, economy in transportation and the flexibility of sectional profiles, which make CFS ideal for modern residential and industrial buildings. They have been increasingly used as purlins as the intermediate members in a roof system, or load-bearing components in low- and mid-rise buildings. However, using CFS members in building structures has been facing challenges due to the lack of knowledge to th

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33

Balarupan, Manuvidhya. "Structural behaviour and design of cold-formed steel hollow section columns under simulated fire conditions." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/91533/1/Manuvidhya_Balarupan_Thesis.pdf.

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This thesis presented a comprehensive study on the fire performance of load-bearing high-strength and cold-formed steel hollow section columns using experimental and numerical investigations. Accurate design tools have been developed to predict the ambient and elevated temperature structural capacities and fire resistance ratings of these columns. These developed design methods can be used to decide where bare steel columns can be used, and to design any required fire protection. Overall this research has significantly improved the knowledge and understanding of the structural fire performance

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34

Ahmed, Warsama. "Nitrifying Moving Bed Biofilm Reactors at Low Temperatures and Cold Shock Conditions: A Kinetic, Biofilm and Microbiome Study." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/41196.

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The nitrification process, the biologically mediated process of ammonia treatment in water resources recovery facilities (WRRF), remains the most common treatment process to mitigate the adverse effects of effluent ammonia discharges in surface water. However, it is well established that the temperature-sensitive process of nitrification remains hindered at low temperatures in conventional suspended growth technologies; specifically, passive treatment systems such as the lagoons, representing over 50% of Canadian treatment facilities in operation. As such, nitrification in lagoon facilities re

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35

Twyman, Kathryn S. "Electrostatic extraction of buffer-gas-cooled beams for studying ion-molecule chemistry at low temperatures." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:583d8060-5570-401d-a8f8-ef5751cfebbb.

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This thesis describes the design, construction, operation, and characterisation of an experimental apparatus that produces a source of internally cold, slow molecules that can be used for studying ion-molecule reactions at low temperatures. The apparatus combines buffer-gas cooling with a bent quadrupole velocity selector to cool both the translational and rotational degrees of freedom of the molecules. A cold cell (6 K) is filled with a buffer gas, such as helium, that exhibits sufficiently high vapour pressure for cryogenic applications. Hot molecules (150 to 300 K) enter the cell and therma

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36

Malcolm, Peter J., University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Effects of root temperatures and genotype on the growth of peach rootstocks and their scions." THESIS_CSTE_SFH_Malcolm_P.xml, 2004. http://handle.uws.edu.au:8081/1959.7/710.

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Spring shock syndrome (SSS) is a condition where flowering and leaf development in peach and nectarine trees is delayed and those leaves that do develop are often small and discoloured. Trees experiencing spring shock syndrome yield poorly. To learn more about the development of this syndrome, this thesis has examined the influence of root zone temperature (RZT) and genotype on the growth of peach rootstocks and the scions grafted onto them. Other factors that influence the quality of peach seedling rootstocks were also examined. Initial trials examined the influence of Okinawa (a low chill cu

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37

Dashti, Narjes. "Plant growth promoting rhizobacteria and soybean nodulation, and nitrogen fixation under suboptimal root zone temperatures." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42011.

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Soybean (Glycine max (L.) Merr.) is a subtropical legume that requires root zone temperatures (RZTs) in the 25 to 30$ sp circ$C range for optimal symbiotic activity. The inability of soybean to adapt to cool soil conditions limits its development and yield in short season areas. In particular, nodulation and N$ sb2$ fixation by this subtropical crop species is sensitive to cool (RZT). The objectives of this thesis were to determine whether or not PGPR could be used to help overcome the low RZT inhibition of soybean nodulation, to improve soybean nitrogen fixation and yield under field conditio

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White, Richard Hampton. "Influence of iron and cytokinin on Cynodon spp. cultured at chilling temperatures." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49961.

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Bermudagrass (<i>Cynodon</i> spp.), when cultured at the northern limit of adaptation for semitropical grasses, is exposed seasonally to temperatures low enough to limit growth and turf quality. Research was conducted to investigate the influence of foliar iron and cytokinin applications on bermudagrass growth during fall and spring. The relationship of photosynthesis, respiration, and nonstructural carbohydrate composition to chilling temperatures was also studied. Foliar applications of Fe in late-summer and fall extended bermudagrass performance during low temperature periods of fall. Freq

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Luby, Theresa. "Lab-scale biological wastewater treatment reactors to assess the combined effects of cold temperatures and ozonation on waste biosolids reduction." Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=121265.

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The treatment and disposal of waste biosolids from activated sludge wastewater treatment plants can contribute a large portion of the total operation costs. Many technologies are being explored to address this issue, and ozonation of return activated sludge (RAS) has been shown to economically reduce waste biosolids production in Europe. However, as European winter temperatures rarely fall below 12 °C, little research has been done on biosolids reduction by ozonation at cold temperatures like during Canadian winters. A previously performed global sensitivity of a model describing ozone tran

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40

Silva, Fernanda Lavínia Moura. "The role of colostrum for the newborn thermogenesis and feeding strategies for calves raised in low temperatures." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-17072018-190304/.

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Dairy calves require nutrients for maintenance and growth, but in cold weather, the body alters physiologic processes to control body temperature through thermogenesis, which increases its requirements. In this regard, it is important a better understanding of how different feeding managements act in the calf thermogenesis, performance and health when raised in temperatures below thermoneutral conditions. Based on that, two studies were performed. The first study evaluated thermoregulation, performance and blood metabolites in thirty newborn calves fed 10%, 15% or 20% BW of colostrum. At 24h o

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Kucherenko, M. Y. "Cryomedicine." Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/45337.

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Cryotherapy is a relatively new form of treatment in which the body is briefly exposed to very cold temperatures in order to promote healing and other therapeutic results. Cryotherapy has been shown to decrease inflammation of the body’s tissues, muscles and joints. It can also help improve the body’s circulation and healing, and also slow down cellular metabolism and reproduction. Cryotherapy can help to reduce pain and muscle spasms in the body as well as reduce the swelling of injuries. Cryotherapy has also been shown to promote faster healing in joint, muscle and tendon injuries.

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Harper, Lee D. "Stark deceleration and reactivity of polyatomic molecules and ions at low temperatures." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:ac6b9303-3abe-4085-b9fc-6a3e76486619.

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This thesis describes the development of a new experimental technique for studying tunable-collision-energy, quantum state-selected, low-temperature ion-molecule reactions. This has been achieved through the combination of a Stark decelerator for neutral dipolar molecules, and a linear Paul ion trap. The Stark deceleration process for ND<sub>3</sub> was examined in detail, through the analysis of experimental data in combination with newly written molecular dynamics simulation programs. In order to prepare a sample of molecules appropriate for collision studies, additional beamline components

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43

Ahamed, Mohamed Imran. "Fire performance and design of CFRP strengthened and insulated cold-formed steel tubular columns." Thesis, Queensland University of Technology, 2019. https://eprints.qut.edu.au/127142/1/Mohamed%20Imran_Ahamed_Thesis.pdf.

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This research study investigated the fire performance of steel columns strengthened with Carbon Fibre Reinforced Polymers (CFRP). Using thermal and mechanical property tests, full scale fire tests and numerical analyses, it showed that suitable insulation layers can be successfully used to increase their fire resistance to required levels. It then developed new design guidelines to determine the fire resistance of CFRP strengthened and insulated steel columns.

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44

Erdal, Ufuk Goksin. "The Effects of Temperatures on System Performance and Bacterial Community Structure in a Biological Phosphorus Removal System." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/26384.

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It is generally accepted that a decrease in temperature causes the rates of chemical and biochemical reactions to slow down, usually resulting in poorer performance of biological wastewater treatment systems. Despite this, early researchers repeatedly showed that excess biological phosphorus removal (EBPR) was more efficient at colder temperatures. Recent studies, however, have demonstrated that the reaction rates of EBPR processes decrease with temperature in accordance with Arrheniusâ Law, resulting in an apparent contradiction in the literature. The objective of this study was to investi

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Heva, Yasintha Bandula. "Behaviour and design of cold-formed steel compression members at elevated termperatures." Queensland University of Technology, 2009. http://eprints.qut.edu.au/29310/.

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Cold-formed steel members have been widely used in residential, industrial and commercial buildings as primary load bearing structural elements and non-load bearing structural elements (partitions) due to their advantages such as higher strength to weight ratio over the other structural materials such as hot-rolled steel, timber and concrete. Cold-formed steel members are often made from thin steel sheets and hence they are more susceptible to various buckling modes. Generally short columns are susceptible to local or distortional buckling while long columns to flexural or flexural-torsional b

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Haworth, Leanne. "Modelling the effect of condensation and evaporation of water on the transient temperatures inside the exhaust system of an IC engine during a cold start." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4285.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>AFRIKAANSE OPSOMMING:Die navorsing wat hier uiteengesit word ondersoek die hipotese dat kondensasie en die gevolglike verdamping van water wat teenwoordig is in die uitlaatgas van ‘n binnebrandenjin, plaasvind in die gedeeltes van die uitlaatstelsel tussen die uitlaatklep en die katalitiese-omsetter se uitlaat. Daar word verder veronderstel dat hierdie tweefasevloeieffekte die tydafhanklike temperatuurprofiele in die uitlaatstelsel beïnvloed, wat moontlik kan lei tot ‘n vertraging in die tydsduu

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Felemban, Dalal Nouruldeen. "The Effects of Cold and Freezing Temperatures on The Blood Brain Barrier and Aquaporin 1, 4, and 9 Expression in Cope's Gray Treefrog (Hyla Chrysoscelis)." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1484650973702078.

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Kawarasaki, Yuta. "SURVIVAL AND PHYSIOLOGICAL RESPONSES TO SUBZERO TEMPERATURES IN THE ANTARCTIC MIDGE, BELGICA ANTARCTICA: TO FREEZE OR NOT TO FREEZE." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1377681162.

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Roy, Jean-Michel L. "Development of Cold Gas Dynamic Spray Nozzle and Comparison of Oxidation Performance of Bond Coats for Aerospace Thermal Barrier Coatings at Temperatures of 1000°C and 1100°C." Thesis, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/20681.

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The purpose of this research work was to develop a nozzle capable of depositing dense CoNiCrAlY coatings via cold gas dynamic spray (CGDS) as well as compare the oxidation performance of bond coats manufactured by CGDS, high-velocity oxy-fuel (HVOF) and air plasma spray (APS) at temperatures of 1000°C and 1100°C. The work was divided in two sections, the design and manufacturing of a CGDS nozzle with an optimal profile for the deposition of CoNiCrAlY powders and the comparison of the oxidation performance of CoNiCrAlY bond coats. Throughout this work, it was shown that the quality of coatings

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Noormohammadi, Alireza [Verfasser], and David [Gutachter] Vilchez. "Investigating the role of prostaglandin signals from adult germ stem cells on somatic aging delay of Caenorhabditis elegans at cold temperatures / Alireza Noormohammadi ; Gutachter: David Vilchez." Köln : Universitäts- und Stadtbibliothek Köln, 2019. http://d-nb.info/1203299095/34.

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