Dissertations / Theses on the topic 'Collapses'
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Kashyap, Mukesh. "Decision support to avoid collapses in structural refurbishment projects." Thesis, Loughborough University, 2007. https://dspace.lboro.ac.uk/2134/34410.
Full textWintels, Werner. "Synoptic energetics of planetary-scale collapses of available potential energy." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84450.
Full textJanuary/February 1989 brought the largest vacillation- and synoptic-scale APE collapses of the study period. A pronounced Madden-Julian Oscillation (MJO) modulated equatorial convection over the Indian Ocean during the APE build-up. The initial APE collapse coincided with Type A development and intensifying MJO convection shifting to the West Pacific warm pool, which was prominent because of the 1988--89 La Nina. Extensive large-scale ascent amplified the thermally direct Hadley cell circulation, with descent strong over East Asia. The second collapse was associated with Type B development characterized by a record-breaking Alaska anticyclone.
Factors explaining lacking precision in energy budget calculations include missing o values above 100 hPa, limited representation of subgrid processes, and limited temporal resolution of diurnal convection over tropical landmasses.
Correlation analysis shows baroclinic conversion (diabatic generation) accounting for 80% (20%) of vacillation-scale dA/dt fluctuations. Baroclinic conversion contributes considerably (69%) to the synoptic variability only during synoptic-scale APE collapses (23 January to 4 February), illustrating the prominence of resolvable baroclinic processes during these periods.
Yuan, Xiaoping. "Extensional collapses in the overpressured frictional upper crust based on limit analysis." Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLEE009/document.
Full textThis manuscript develops a 2D kinematic approach of Limit Analysis to examine the extensionalfailures in the brittle, upper crust resulting from fluid overpressures and normal faulting. There aremany interesting topics related to the extensional deformation such as (1) the roles of fluid pressure,topographic process, material and fault properties on the stability of extensional structures; (2) theformation of low-angle and listric normal fault; (3) the deformation pattern due to slip on a low-anglefault; and (4) the influence of fault softening and sedimentation processes on this deformation pattern.This mechanical approach applied to wedge prototypes is validated by the critical Coulomb wedge(CCW) theory, and it generalizes the CCW theory to investigate the complex topography on theMejillones peninsula, Northern Chile. Additionally, this approach is also applied to investigate gravityinstability of Niger Delta by linking down-slope compressional to up-slope extensional failures througha deep detachment. We predict much higher fluid overpressures than that of the CCW theory. Finally,this Limit Analysis methodology is applied to investigate the shape of normal fault linking a lowdetachment to the surface. The application to Niger Delta implies that the formation of very low-angleand strongly listric faults results from a shallow fluid-retention depth. The sequential version of LimitAnalysis opens new ways to envision the structural evolution through time resulting from normalfaulting. The simulations show that the normal fault rotates during extension, forming a region of Footto-Hanging Wall (FHW) where the material in the footwall is sheared upon entering the hanging wall.The creation of the FHW region is illustrated by sandbox experiments and field examples
Arcangeli, Daniele. "Scenarios of lateral collapses of the Vavilov seamount in the central Tyrrhenian sea." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18134/.
Full textKhan, Muhammad Abbas. "Detection of collapses and communicating with inaccessible areas in underground coal mines using WSN." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2016. https://ro.ecu.edu.au/theses/1782.
Full textAlston, Sylvia, and n/a. "Where meaning collapses: a creative exploration of the role of humour and laughter in trauma." University of Canberra. Professional Communication, 2009. http://erl.canberra.edu.au./public/adt-AUC20091215.114305.
Full textHoyte, Catherine, and n/a. "An Australian Mirage." Griffith University. School of Arts, Media and Culture, 2004. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20040719.103628.
Full textSenac, Geoffrey. "Automatic load shedding scheme and the integration of new capacitors’ controller in the South-West region of France to mitigate large scale voltage collapses." Thesis, KTH, Elektriska energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153666.
Full textÅnäs, Kristoffer. "The Significance of Giant Flank Collapses on Magma Ascent in the NE Rift Zone of Tenerife, Canary Islands: A Structural Modelling and Diffusion Approach." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-438578.
Full textPå vulkanön Teneriffa i den kanariska övärlden har flera jättelika skred skett. Kopplingen mellan dessaskred och vulkanismen i sprickzonerna på ön har undersökts inom ramen för detta arbete. Enfältundersökning genomfördes längs den nordöstra sprickzonen på Teneriffa, där data ommagmagångarnas orientering och läge insamlades. För att bestämma hur snabbt magman steg till ytan,genomfördes diffusionsanalys av Mg i olivinkristaller från ankaramitgångar i samarbete med ETH iZürich. Utöver det utfördes även experiment med analoga gelatinmodeller för att förbättra förståelsenför de processer som förändrar linjära riftzoner till treaxliga eller fleraxliga riftzoner. Injiceringen avvätskan i gelatinmodellerna producerade sprickor som i huvudsak var linjära och följde strykriktningenpå riftzonen. Position A’, i mitten av den instabila sektorn i modellen gav högst variation avinjiceringarna och hade omkring 30 % högre acceleration jämfört med position A placerad i kanten avden instabila sektorn. Baserat på resultatet av diffusionsmodelleringen kunde en uppstigningshastighetför magman beräknas till en medelhastighet på 10,4–14,0 km/h. Detta är extremt snabbt och visar attkollapsen av Orotava är starkt kopplad till bildningen av ankaramitgångar i området som ett resultat aven plötslig minskning av det litostatiska trycket.
Clowney, Patrick. "Colossal Collapses| An Analysis of 11 Department of Defense Acquisition Program Management Factors that Influence Department of Defense Acquisition Program Termination Using Relative Importance Weight and Chi-squared Distribution." Thesis, The George Washington University, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10150142.
Full textThe United States Department of Defense (DoD) loses billions of dollars annually on cancelled or failed acquisition programs. Several DoD acquisition studies, Office of Management and Budget Studies, Government Accountability Office Reports, as well as other studies highlight the disturbing fact, of a plethora of programs that fail to meet full operational requirement capabilities, and therefore, are eventually cancelled. In these cases, the DoD loses billions of investment dollars without any return. Scholars, program managers, and systems engineers posit that there are a host of factors that influence whether a program is cancelled or allowed to continue. They include, but are not limited to political pressures, cost overruns, schedule overruns, and performance shortfalls.
The research here aims to add to the body of knowledge of systems engineering, program management, and the factors that influence acquisition program terminations within the United States Department of Defense (DoD). Specifically, this research surveyed the United States DoD acquisition program managers, defense industry program managers, and defense industry consultants, to evaluate and analyze the key program factors that influence DoD acquisition program terminations. The research also conducted a comparison of different attributes that would lead to project failure amongst various groups. This research used relatively important weight calculations and a chi-squared distribution analysis in order to compare the differences between DoD acquisition program managers, defense industry program managers, and defense industry consultants, with regards to the factors that lead to DoD acquisition program terminations. This research aims to further answer several interrelated research questions, in order to identify the factors that have the greatest influence on program and project cancellation from the expert’s perspective, and capture any significant differences between DoD program managers, DoD industry personnel, and DoD consultants. The research questions include the following:
1) Are there any statistically significant differences between what DoD program managers, DoD industry personnel, and DoD consultants personnel think influence program cancellation? 2) Are there statistically significant differences of the various DoD acquisition program factors between what DoD program managers, DoD industry personnel, and DoD consultants personnel think influence program cancellation?
An exhaustive literature review identified 11 critical factors that were associated with program management for examination. For this study, the examination and methodology used were the Relative Importance Weight technique, to analyze the attributes and factors. RIW methodology consisted of conducting a survey to identify and evaluate the relative importance of the signi?cant factors influencing program termination. Respondents of this survey included the following groups: 1) DoD program and project managers, 2) DoD Industry personnel, and 3) DoD consultants. The outcomes of this research serve three primary purposes: 1) identify the Relative Importance Weight of DoD acquisition program factors that influence program termination, 2) fulfill a system’s engineering and program management’s knowledge gap, by understanding and identifying the most critical factors within the unique DoD acquisition program management system, and 3) serve as a spring board for future research for DoD program management. The results of this research indicate that a statistically significant difference does not exist between the three groups with relative importance of 11 program management factors.
Lans, Benjamin. "Genèse des systèmes karstiques de Gironde (Entre-deux-mers et Graves) : role de la "fantômisation" et du potentiel hydrodynamique dans les calcaires oligocènes, crétacés et miocènes." Thesis, Bordeaux 3, 2014. http://www.theses.fr/2014BOR30058.
Full textThe aim to this PhD thesis is to apply the new ghost-rock alteration paradigm to the Gironde (SW France), first to tertiary limestone, then secondarily to cretaceous limestone. The ghost-rock alteration transforms, probably by biochemical processes, the unweathered rock to porous rock, keeping its original volume. This is also called isovolumic alteration or "geoporosis". The interest of the Gironde is that it presents large carbonated areas, more or less karstified, especially the Entre-deux-Mers limestone plateau and its numerous caves. In quarries, the limestone from early Oligocene shows alteration phenomena that can be used as a model to explain the genesis of local caves. The advantage of this area is to present different evolutionary stages of karstification by ghost-rock alteration, depending on the hydrodynamic potential. We can observe all the stages in plains and low plateau areas: - Incipient karstic systems, in genesis phase, situated on the left bank of the Garonne river, in the groundwater table variation level; - Young karstic systems in dewatered areas, lost-resurgence type, in the Entre-deux-Mers; - Complex karstic systems formed by several limestone layers, affected by ghost-rock alteration, from late Cretaceous to Oligocene and Miocene, in the south of the Gironde; - Palaeokarsts probably dating from middle Pleistocene, clogged with sediment; - Early palaeokarsts, corresponding to a preliminary phase of sedimentation into ghost-rock altered areas, recently dewatered by a relative lowering of the water table (uplift) . All these stages of karstic evolution in Gironde help us to build a speleogenesis model, based on hydrodynamic parameters controlling the mechanical removal of the alterite. This new look at the speleogenesis is an opportunity to better understand the functioning of the sources situated on the left bank, which have regular and highly buffered flows. The pumping of groundwater for more than 30 years, causing a lowering of the water table, could explain some local collapses and depletion of several sources. These aspects of civil engineering show the importance of this issue at the limit of fundamental / applied research. Indeed, the drinking water of Bordeaux agglomeration is provided exclusively from cenozoic grounds, and in particular oligocene limestone
Feuer, Mia. "Collapse." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/1820.
Full textNormann, Andrew J. "Twice Collapsed." Bowling Green State University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1428515708.
Full textConstan, Lea. "On Collapse." Thesis, Konstfack, Textil, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:konstfack:diva-7802.
Full textCroudace, Katherine Margaret. "Relativistic cosmological collapse." Thesis, University of Cambridge, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627524.
Full textHuber, Sacha. "Economic Theories of Collapse." St. Gallen, 2008. http://www.biblio.unisg.ch/org/biblio/edoc.nsf/wwwDisplayIdentifier/06612162001/$FILE/06612162001.pdf.
Full textOchsendorf, John Allen. "Collapse of masonry structures." Thesis, University of Cambridge, 2002. https://www.repository.cam.ac.uk/handle/1810/244820.
Full textTziannaros, M. "Modelling bladder-collapse flow." Thesis, University College London (University of London), 2011. http://discovery.ucl.ac.uk/1317813/.
Full textSkinfill, Craig Ernest. "Electromagnetism in Gravitational Collapse." BYU ScholarsArchive, 2005. https://scholarsarchive.byu.edu/etd/349.
Full textPapapietro, Luca. "Gravitational collapse and Hawking radiation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/17999/.
Full textSkinfill, Craig Ernest. "Electromagnetism in axisymmetric gravitational collapse /." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1152.pdf.
Full textOmukai, Kazuyuki. "Protostellar Collapse with Various Metallicities." 京都大学 (Kyoto University), 2000. http://hdl.handle.net/2433/181102.
Full textAguilar-Martinez, Silvestre. "Critical collapse of Newtonian fluids." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54754.
Full textScience, Faculty of
Physics and Astronomy, Department of
Graduate
Akbarian, Kaljahi Arman. "Numerical studies in gravitational collapse." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/56287.
Full textScience, Faculty of
Physics and Astronomy, Department of
Graduate
Herbauts, Isabelle Manon. "Causal wave function collapse model." Thesis, Queen Mary, University of London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427988.
Full textBack, Trevor. "Ionisation induced collapse of minihaloes." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7608.
Full textEldridge, J. J. "Progenitors of core-collapse supernovae." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598804.
Full textAgelidis, Nicholas. "Collapse of stringer-stiffened cylinders." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37384.
Full textLangroudi, Arya Assadi. "Micromechanics of collapse in loess." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5284/.
Full textHamadé, Rufus Salah. "Critical phenomena in gravitational collapse." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624941.
Full textShieh, Jinn-An. "Film collapse in elastohydrodynamic lubrication /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487760357820679.
Full textWood, Curtis James. "PROGRESSIVE COLLAPSE OF FRAME BUILDINGS." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543244236847612.
Full textStephen, David Ojonimi. "Progressive collapse assessment of structures." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/17769/.
Full textYeh, Wei-Ming. "Pattern collapse in lithographic nanostructures: quantifying photoresist nanostructure behavior and novel methods for collapse mitigation." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47696.
Full textWang, Pengyu. "Collapsed variational inference for computational linguistics." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:13c08f60-1441-4ea5-b52f-7ffd0d7a744f.
Full textMalavolti, Carlotta. "The collapse of the Twin Towers." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3278/.
Full textOhashi, Seiju. "Gravitational Collapse in the Lovelock Theory." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/175111.
Full textTo, Kenneth Chi-Wan. "Intracellular mechanisms underlying growth cone collapse." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31697.
Full textMedicine, Faculty of
Graduate
Smit, Job Martijn. "Neutrino transport in core-collapse supernovae." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 1998. http://dare.uva.nl/document/91897.
Full textAhmadi-Nedushan, Behrooz 1966. "Progressive collapse analysis of offshore platforms." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22639.
Full textFrom August 24 to 26 1992, hurricane Andrew moved through the Gulf of Mexico with sustained winds of 140 miles per hour. Thirty-six major platforms suffered significant damage, of these, ten were completely toppled and twenty-six were leaning significantly or had significant topside damage.
Structures "H" and "K" were bridge-connected platforms, located in the ST151 field of the South Timbalier area of the Gulf of Mexico, platform "H" collapsed during Andrew, while "K" survived undamaged. They were both designed, fabricated, and installed in the early 1960's.
A push-over analysis, using the program USFOS was used to estimate the ultimate strength of the two structures in three direction: end-on, diagonal and broadside.
In the first series of analyses, all the primary members such as legs, vertical and horizontal braces, piles, soil, conductors and deck structure were precisely defined with appropriate finite elements as well as secondary members such as conductors guides barge bumpers. In the second series of analyses it was assumed that there was no horizontal or vertical movements at the level of the mudmat. In the third series of analysis the model used in the first series of analysis was modified by increasing stiffness and resistance of the piles 10 times. Finally a fourth model was investigated in which the soil resistance of the mud-level horizontal members is modelled. (Abstract shortened by UMI.)
Fasia, Alexandra. "Spectroscopic study of core-collapse supernovae." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313777.
Full textVeal, Andrew Richard. "Models of polymer adsorption and collapse." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277107.
Full textFlint, Graeme. "Fire induced collapse of tall buildings." Thesis, University of Edinburgh, 2005. http://hdl.handle.net/1842/1172.
Full textDove, Christopher John. "Explicit wavefunction collapse and quantum measurement." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5187/.
Full textCrockett, R. M. "The progenitors of core-collapse supernovae." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517262.
Full textHolland, M. R. "Canopy collapse of dried pea crops." Thesis, University of Edinburgh, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305741.
Full textPark, Jong-Chan. "Bending collapse behaviourof top-hat tubes." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398576.
Full textOnoufriou, Andriani. "Collapse of damaged ring stiffened cylinders." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/47537.
Full textDai, Lei Ph D. Massachusetts Institute of Technology. "Spatio-temporal dynamics before population collapse." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/95869.
Full textCataloged from PDF version of thesis.
Includes bibliographical references.
Theory predicts that the approach of catastrophic thresholds in natural systems may result in an increasingly slow recovery from small perturbations, a phenomenon called critical slowing down. In this thesis, we used replicate laboratory populations of the budding yeast Saccharomyces cerevisiae for direct observation of critical slowing down in spatio-temporal dynamics before population collapse. In the first project, we mapped the bifurcation diagram experimentally and found that the populations became more vulnerable to disturbance closer to the tipping point. Fluctuations of population density increased in size and timescale near the tipping point, in agreement with the theory. In the second project, we used spatially extended yeast populations to evaluate early warning signals based on spatio-temporal fluctuations. We found that indicators based on fluctuations increased before collapse of connected populations; however, the magnitude of increase was smaller than that observed in isolated populations, as local variation is reduced by dispersal. Furthermore, we propose a generic indicator based on deterministic spatial patterns, recovery length. In our experiments, recovery length increased substantially before population collapse, suggesting that the spatial scale of recovery can provide a warning signal before tipping points in spatially extended systems. In the third project, we characterized how different environmental drivers influence the dynamics of yeast populations. We compared the performance of early warning signals across multiple deteriorating environments. We found that the varying performance is determined by how a system responds to changes in a specific driver, which can be captured by a relation between stability and resilience. Furthermore, we demonstrated that the positive correlation between stability and resilience, as the essential assumption of indicators based on critical slowing down, can break down when multiple environmental drivers are changed simultaneously.
by Lei Dai.
Ph. D.
Hrousis, Constantine Athanasios 1970. "Computational modeling of asthmatic airway collapse." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/32692.
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