Dissertations / Theses on the topic 'LARGE INFLUENCERS'
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1
Linstead, Conor. "The influences of large woody debris on British headwater streams." Thesis, University of Birmingham, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368996.
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This thesis examines the influence of large woody debris (LWD) on the physical habitat of British headwater streams. The distribution and density of LWD accumulations throughout catchments is considered using data from the River Habitat Survey (RHS) and more detailed catchment scale surveys. The effect of accumulations of LWD on stream hydraulics and physical habitat at a reach scale is examined using transect based measurements of depth and velocity over a range of discharges before and after LWD removal for two reaches, measurement of reach average hydraulic parameters for 25 reaches with differing levels of LWD and the application of the Aggregated Dead Zone (ADZ) and Physical Habitat Simulation (PHABSIM) models. The RHS and catchment scale surveys showed that LWD accumulations exhibit systematic patterns in abundance within catchments, smaller streams having a higher density of LWD and a greater number of LWD accumulations. The most hydraulically active type of LWD accumulations were found to reduce flow velocity by an average of 55%, increase channel roughness by 149% and increase depth by 165%. This impact was, however, found to vary with discharge. Application of the Aggregated Dead Zone (ADZ) model showed that LWD increases the volume of ADZ, which may indicate greater ecological refuge potential. Using the Physical Habitat Simulation (PHABSIM) model, it was found that LWD improved habitat quality and overall habitat diversity.
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Mills, Roger W. "Influences upon the capital budgeting decision : an analysis of the influence of senior central and divisional management in large, divisionalised UK companies." Thesis, Henley Business School, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305307.
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Olkhovskaya, Julia. "Large-scale online learning under partial feedback." Doctoral thesis, Universitat Pompeu Fabra, 2022. http://hdl.handle.net/10803/673926.
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La toma secuencial de decisiones con incertidumbre cubre una amplia clase de problemas. Las aplicaciones reales requieren que los algoritmos sean computacionalmente eficientes y escalables. Nosotros estudiamos un rango de problemas de toma secuencial de decisiones donde el agente obtiene información parcial de las recompensas, y desarrollamos algoritmos que son robustos y computacionalmente eficientes en problemas de grandes dimensiones.
El primer problema que consideramos es un problema de maximización de la influencia en línea en el que el agente selecciona secuencialmente los nodos del grafo con el objetivo de esparcir la información a través de éste poniéndola en los nodos elegidos. El feedback disponible es solo alguna información sobre los vecinos más cercanos del vértice seleccionado. Nuestros resultados muestran que esas observaciones locales y parciales pueden ser suficientes para maximizar la influencia global. Proponemos algoritmos de aprendizaje secuencial que intentan maximizar la influencia y presentamos un análisis teórico tanto en los regímenes subcrítico y supercrítico de modelos gráficos. Estos son los primeros algoritmos de maximización secuencial de influencia que son eficientes en grafos con gran cantidad de nodos.
En otra línea de trabajo, estudiamos el problema de bandidos multibrazos contextuales, donde la función recompensa puede cambiar de modo adverso y el agente solo puede observar las recompensas asociadas a sus acciones. Asumimos que el número de brazos es finito y que la dimensión del espacio de contextos puede ser infinita. Desarrollamos un algoritmo computacionalmente eficiente bajo la asunción que los contextos d-dimensionales son generados aleatoriamente de una distribución conocida, de forma idéntica e independiente. También proponemos un algoritmo robusto frente a errores de especificación en el caso en el que la función recompensa real es lineal con un error aditivo no lineal. Hasta nuestro conocimiento, nuestras garantías de performance constituyen los primeros resultados en este problema. También mostramos una extensión para cuando el contexto es un elemento de un espacio de hilbert con kernel reproducible.
Finalmente, consideramos una extensión del problema de las máquinas tragamonedas contextuales descrito previamente. Estudiamos el caso en el que el agente interactúa con un proceso de decisión de Markov en una secuencia de episodios, donde un adversario escoge la función recompensa y solo observamos las observaciones de las recompensas de la acción elegida. Consideramos un espacio de estados arbitrariamente grande, pero asumimos que todas las funciones de acción-valor pueden ser representadas como funciones lineales en términos de un mapa de características de baja dimensión conocido, y que el agente tiene acceso a un simulador de trayectorias en el MDP. Nuestra principal contribución es el desarrollo de los primeros algoritmos que se han probado robustos y eficientes en este problema.Sequential decision making under uncertainty covers a broad class of problems. Real-world applications require the algorithms to be computationally efficient and scalable. We study a range of sequential learning problems, where the learner observe only partial information about the rewards we develop the algorithms that are robust and computationally efficient in large-scale settings. First problem that we consider is an online influence maximization problem in which a decision maker sequentiaonally selects a node in the graph in order to spread the information throughout the graph by placing the information in the chosen node. The available feedback is only some information about a small neighbourhood of the selected vertex. Our results show that such partial local observations can be sufficient for maximizing global influence. We propose sequential learning algorithms that aim at maximizing influence, and provide their theoretical analysis in both the subcritical and supercritical regimes of broadly studied graph models. Thus this is the first algorithms in the sequential influence maximization setting, that perform efficiently in the graph with a huge number of nodes. In another line of work, we study the contextual bandit problem, where the reward function is allowed to change in an adversarial manner and the learner only gets to observe the rewards associated with its actions. We assume that the number of arms is finite and the context space can be infinite. We develop a computationally efficient algorithm under the assumption that the d-dimensional contexts are generated i.i.d. at random from a known distribution. We also propose an algorithm that is shown to be robust to misspecification in the setting where the true reward function is linear up to an additive nonlinear error. To our knowledge, our performance guarantees constitute the very first results on this problem setting. We also provide an extension when the context is an element of a reproducing kernel Hilbert space. Finally, we consider an extension of the contextual bandit problem described above. We study a setting where the learner interacts with a Markov decision process in a sequence of episodes, where an adversary chooses the reward function and the reward observations are available only for the selected action. We allow the state space to be arbitrarily large, but we assume that all action-value functions can be represented as linear functions in terms of a known low-dimensional feature map, and that the learner at least has access to the simulator of the trajectories in the MDP. Our main contributions are the first algorithms that are shown to be robust and efficient in this problem setting.
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Hill, S. D. "Influences of large herbivores on small rodents in the New Forest, Hampshire." Thesis, University of Southampton, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356782.
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Janzen, Izabelle. "Modeling distal pointing on large screens : the influence of target depth." Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/59047.
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Pointing is a fundamental task within many interactions in current computer applications.
It is incorporated into everything from selecting buttons to dragging
files or positioning objects in a virtual environment. Thus, understanding, modeling
and predicting pointing performance is crucial to the design and evaluation
of many computer interfaces. Fitts’s Law (1954) is the basis for modeling human
pointing performance in the international standard on pointing device evaluation
(ISO 9241-400:2007). However, while it is extremely robust for many standard
desktop applications, previous work by Shoemaker et al. (2012) has suggested that
Fitts’s Law may not be robust enough to accurately model pointing at more extreme
levels of gain and has proposed alternatives to Fitts’s Law based on earlier
work by Welford (1968). This thesis extends preliminary research by Rajendran
(2012) that further examined these alternatives to Fitts’s Law for distal pointing.
Distal pointing is common in virtual and augmented reality interfaces. We first
re¨analyze results reported by Rajendran using a variety of Welford-style models to
explore the relationship between target depth and a parameter k that was first suggested
by Kopper et al. (2010) but is inherent inWelford’s model. We then present
a new experiment that removes the confound of system latency from Rajendran’s
approach. Our analyses provide evidence that k varies monotonically (possibly
linearly) with target depth, which further supports the claim by Shoemaker et al.
that Welford-style two-part models are preferable to Fitts-style one-part models in
some situations. Our analyses also challenge Kopper et al.’s suggestion that angular
measures of task difficulty are superior to linear measures for pointing models.
We close with a discussion of how our findings about the variation of k with target
depth might be used in calibration procedures for virtual environments.Science, Faculty of
Computer Science, Department of
Graduate
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Lock, Cinde L. "The influence of a large-scale assessment program on classroom practices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ65679.pdf.
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De, Basso Rachel. "Influence of genetics and mechanical properties on large arteries in man." Doctoral thesis, Linköpings universitet, Fysiologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-29492.
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Arterial pathology is the major contributor to cardiovascular diseases and mortality. The mechanical properties of arteries are independent factors for cardiovascular disease and mortality, where genetics influence the structure of the arterial wall, which may result in change in arterial stiffness. The aims of this thesis were to study the mechanical properties of the popliteal artery (PA) in healthy subjects and the influence of angiotensin-converting enzyme (ACE) polymorphism and Fibrillin-1 (FBN1) polymorphism on large arteries. Further, the impact of FBN1 polymorphism on cardiovascular morbidity and mortality was investigated. The PA is, after the abdominal aorta, the most common site of aneurysmal development. The PA was studied in healthy subject with ultrasound and the diameter increased and the distensibility decreased with age, with men having lower distensibility than women. This seems not to be the behavior of a true muscular artery but rather of a central elastic artery such as the aorta, and might have implications for the susceptibility to aneurysm formation, as well as the association of dilating disease between the PA and the aorta. The wall stress in the PA was low and unaffected by age, probably caused by a compensatory remodeling response with an increase in wall thickness. This indicates that other mechanisms than wall stress contribute to the process of pathological dilatation in the PA. The ACE D allele may be associated with abdominal aortic aneurysm. Elderly men with the ACE D allele were associated with increased abdominal aortic stiffness compared to men carrying the I/I genotype. This suggests that the ACE D allele impairs arterial wall integrity, and in combination with local hemodynamic and other genetic factors it may have a roll in aneurysm formation. The FBN1 2/3 genotype has been associated with increased systolic blood pressure. The FBN1 2/3 genotype in middle-aged men was associated with increased abdominal aortic stiffness and blood pressure which indicates an increased risk for developing cardiovascular disease. The increased presence of plaque in the carotid artery of middle-aged men with the FBN1 2/3 genotype indicates a pathological arterial wall remodeling with a more pronounced atherosclerotic burden, but did however not affect the risk of cardiovascular events and/or death in this population. This relationship needs to be studied further.
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Klossner, David. "FACTORS THAT INFLUENCE FIRMS’ ENVIRONMENTAL PERFORMANCE: AN EXAMINATION OF LARGE COMPANIES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1395301067.
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Zierler, Rupert. "Energy-saving attitudes and behavioural influences in large organisations : the case of Network Rail." Thesis, University of Surrey, 2018. http://epubs.surrey.ac.uk/845644/.
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Railways in the UK account for 1% of all electricity consumed nationally, and Network Rail consumed in excess of 400GWh in 2013/14. Large organisations need to reduce their energy consumption in order to prevent adverse climatic effects driven by anthropogenic greenhouse gas emissions. This doctoral thesis investigates attitudes and behaviours of individual Network Rail employees, relating to the adoption of energy-efficient practices and technologies, and their likely impacts on the organisation’s energy consumption. The research programme consists of two principal stages. Firstly, an exploratory approach is taken with managers of railway energy infrastructure to establish factors which may be influencing these behaviours, based on a commonly-used research framework for semi-structured interviews. Secondly, a staff survey is developed based on findings from the exploratory interviews. This is designed to test commonly-used behavioural frameworks from the sociological and psychological literature on pro-environmental behaviours in a variety of contexts, including the Theory of Planned Behaviour (Ajzen, 1991), and Theory of Interpersonal Behaviour (Triandis, 1977). This survey also tests the salience of a set of barriers to energy efficiency in organisations proposed by Sorrell et al (2000; 2004). However, analysis of collected survey data suggests that no single theory provided a strong fit with observed results. Principal components analysis and structural equation modelling suggest an array of 6 alternative factors governing energy-efficient behaviours, management practices, and technology adoption, and an alternative causal model is proposed, based on these new factors. Cluster analysis then categorises groups of employees based on their personal approaches to energy consumption. Although a combination of technological- and behavioural interventions are required to mitigate global greenhouse gas emissions (IPCC, 2014b), the findings presented here highlight how understanding the attitudinal and behavioural context in which energy consumption behaviours take place can help large organisations such as Network Rail lower their electricity consumption.
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Morris, Arthur E. L. "Influence of stream corridor geomorphology on large wood jams and associated fish assemblages in mixed deciduous-conifer forest in Upper Michigan." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1123513768.
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Thesis (Ph. D.)--Ohio State University, 2005.Title from first page of PDF file. Document formatted into pages; contains xvi, 263 p.; also includes graphics (some col.). Includes bibliographical references (p. 241-263). Available online via OhioLINK's ETD Center
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Holland, Aneatra. "Nonprofit Leaders' Strategies in Capturing the Attention of Committed, Large Donors." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/3227.
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Few U.S. nonprofit organizations meet annual operational costs. Facing government funding cuts, U.S. nonprofit leaders have had to seek other revenue streams to remain operable and ensure that the clients they serve continue to receive support. Leaders often seek out large donors but lack strategies for successfully doing so. The purpose of this multiple case study was to explore the strategies successful nonprofit leaders have used to capture the attention of committed, large donors in Southern California. Government failure theory and independence theory constituted the conceptual framework. The purposeful sampling method consisted of 3 nonprofit agency managers who had operated a nonprofit for at least 5 years, while securing a longstanding partnership of large, committed donors. These managers substantiated having met the criteria in having successfully gained committed large donor(s), and operating in a geographic setting with no less than 50,000 residents. Data included participant interviews and company websites. Transcribed data were analyzed by comparing meanings that formulated clusters into themes, and then triangulated across sources to bolster the trustworthiness of interpretations. From these clusters, 5 distinctive themes were identified: cultivating donors, building personal relationships with donors, promoting the mission, understanding relationship contribution, and detailing directly what the donation will accomplish. Findings impact social change by fortifying nonprofits with committed large donors, to reduce need in society, and create greater financial independence within communities.
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Hegyi, Bradley Michael. "Dynamical and thermodynamical influences of the tropics and midlatitudes on arctic hydroclimate variability." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53869.
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The Arctic is an important component of the Earth’s climate system, and it is a region dynamically coupled to climate phenomena at lower latitudes, through both atmospheric and oceanic paths. The coupling has significant effects on the hydroclimate variability in the Arctic, including effects on sea ice and Arctic precipitation. In this dissertation, we explore the coupling of the lower latitudes and the Arctic hydroclimate through atmospheric mechanisms with dynamical and thermodynamical components, with a focus on the following examples of variability: i) the decadal variability of boreal winter Arctic precipitation, ii) the variability of the strength of the stratospheric polar vortex in boreal winter, and iii) the initial melt of Arctic sea ice in late boreal spring. The goal of the research is to understand what drives the Arctic hydroclimate variability in each of these examples through improved knowledge of the mechanisms linking them to the tropics and Northern Hemisphere midlatitudes.
In the first part of the analysis, we explore the mechanisms responsible for the decadal variability of boreal winter Arctic precipitation. We find that the decadal variability of cool-season Arctic precipitation is at least partly connected to decadal modulation of tropical central Pacific sea surface temperatures related to the El Niño-Southern Oscillation (ENSO). The modulation can be described as the oscillation between periods favoring central and eastern Pacific warming events [CPW and EPW, respectively], which are two common types of ENSO variability. By analyzing a collection of CPW and EPW events in reanalysis data, we establish the following connecting mechanism. First, the increase of central Pacific SSTs drive a Rossby wave train that destructively interferes with the zonal wavenumber 1 component of the background extratropical planetary wave in the subpolar region. Next, as a result of this interference, the magnitude of the vertical Rossby wave propagation from the troposphere to the stratosphere decreases and the stratospheric polar vortex strengthens. Finally, the strengthening of the vortex translates into a tendency towards a positive Arctic Oscillation (AO) in the troposphere and a poleward shift of the Northern Hemisphere midlatitude storm tracks, increasing moisture transport from lower latitudes and increasing total Arctic precipitation.
In a further investigation of a crucial component of the above mechanism, the initial response of the stratospheric polar vortex to the influence of CPW and EPW is investigated. A 20-member ensemble run of an idealized model experiment in the NCAR Whole Atmosphere Community Climate Model (WACCM) is conducted with prescribed CPW and EPW pattern SST anomalies. Both CPW and EPW events weaken the polar vortex in the ensemble mean. The weakening is mainly tied to changes in the eddy-driven mean meridional circulation, with some contribution from eddy momentum flux convergence. There is a significant spread between ensemble members with identical CPW and EPW forcing, where a few of the ensemble members exhibit a weak strengthening response. The initial conditions of the extratropical atmosphere and subsequent internal variability after the introduction of the CPW and EPW forcing help drive the spread in response between individual members.
In the last part of the analysis, using MERRA reanalysis data, the means by which atmospheric eddies affect the trend and variability of the initial melt of Arctic sea ice are explored. We focus specifically on the effects of lower troposphere (i.e. 1000-500 mb average) meridional heat transport by atmospheric eddies, a dynamical component of the atmospheric eddy mechanism, and eddy-generated surface downwelling shortwave and longwave radiation anomalies, a thermodynamical component. Although in a climatological sense, atmospheric eddies in all major frequency bands transport heat poleward into the Arctic, we find that the lower-troposphere eddy meridional heat transport does not contribute to the trend of an earlier initial melt date. However, eddy heat transport still plays an important role in the initialization of individual episodes of initial melt with large areal coverage. In the investigation of two specific episodes, the meridional heat transport term that represents the interaction between the eddy wind and mean temperature fields (i.e. the product of the meridional eddy wind and the mean temperature fields) is most associated with the initial melt in both episodes. Additionally, melt in one of the episodes is also associated with surface downwelling longwave and shortwave radiation anomalies, a result of eddy-generated cloud cover anomalies. Therefore, in individual melt events, the combination of direct eddy meridional heat transport and surface longwave and eddy-driven shortwave radiation anomalies may significantly contribute to the initial melt of Arctic sea ice. This combination may be especially important in episodes where significant initial melt occurs over a large area and over a period of a few days.
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Valentín, Ruiz David. "Influence of the boundary conditions on the dynamic behavior of large hydraulic machines." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/461459.
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Nowadays, hydropower plays an essential role in the energy market. With the massive entrance of new renewable sources such as wind or solar power, hydropower is the only renewable generating source that can provide fast response and regulation capacity to the electric grid. It can even store the surplus of energy when it is necessary using Reversible Pump-Turbine (RPT) power plants. However, this situation makes that hydraulic turbines are increasingly working at off-design conditions with a high number of start and stops in comparison with ten years ago. At these conditions, the forces and stresses over the structure are high, especially in the runner, documenting some failures along the time.
Therefore, it is of paramount importance to study the dynamic behavior of the runner under operation in order to avoid resonance conditions and fatigue problems. To study the dynamic behavior of the runner, both excitation and response have to be determined. Excitation forces have been studied for many years and they can be predicted with good accuracy through computational methods. However, the dynamic response of the runner still needs to be studied in detail. To define this dynamic response, natural frequencies, damping ratios and mode-shapes of the runner have to be estimated under operating conditions and for the different boundary conditions found in a hydraulic turbine.
In this thesis, the natural frequencies, damping ratios and mode-shapes of submerged structures under different boundary conditions are studied. As a hydraulic turbine runner is a complex structure where the boundary conditions are fixed, simplified models are used to study the influence of those boundary conditions on their dynamic response. Submerged and confined disks have been used to experimentally study the effects of axial and radial gaps to rigid walls, the effects of rotation and the effects of the acoustic modes of the surrounding fluid on their dynamic response. Moreover, experimental measurements in a large Pump-Turbine and a large Francis turbine prototype have been performed to confirm the knowledge acquired in the simplified models. Numerical models have been also developed and validated in the present work to study the dynamic response of hydraulic turbine runners.
This is an Article-Based Thesis, so it is based on three Journal Papers that have been published during the thesis duration. These three Journal Papers are based on the simplified models research, and they are attached and commented though the whole document of this thesis. Moreover, a summary of the findings of the research on hydraulic turbine prototypes is also included to extend the application of the knowledge acquired with the simplified models to actual hydraulic turbine prototypes.Avui en dia l'energia hidràulica té un paper molt important en el mercat energètic. Amb l'entrada massiva de l'energia eòlica i solar, l'energia hidràulica és l'única energia renovable que és capaç de proporcionar una ràpida resposta i capacitat de regulació a la xarxa elèctrica. A més, pot inclús emmagatzemar l'energia sobrant quan és necessari utilitzant les centrals hidroelèctriques reversibles basades en bombes-turbines. Tanmateix, això fa que les turbines hidràuliques treballin en condicions fora de disseny, augmentant també el nombre de parades i arrencades en comparació amb deu anys enrere. En aquestes condicions, les forces i estressos que pateix l'estructura, especialment el rodet de la turbina hidràulica, són molt alts, fet que ja ha provocat important avaries al llarg del temps. Això fa que sigui molt important estudiar el comportament dinàmic del rodet en condicions d'operació per tal d'evitar possibles ressonàncies o problemes de fatiga. Per a estudiar el comportament dinàmic del rodet, s'han de conèixer en detall tant les possibles fonts d'excitació com la resposta dinàmica de la màquina. Les forces d'excitació han estat estudiades des de fa molts anys i actualment es poden determinar amb bona exactitud amb mètodes numèrics. En canvi, la resposta dinàmica de rodets necessita encara ser estudiada amb més detall. Per a fer això, les freqüències pròpies, l'amortiment i els modes propis del rodet han d'estimar-se sota les condicions d'operació de la màquina i per a les diferents condicions de contorn que es poden trobar en una turbina hidràulica. En aquesta tesi s'estudien les freqüències pròpies, amortiment i modes propis d'estructures submergides i sota diferents condicions de contorn. Com que els rodets de les turbines hidràuliques són estructures complexes on les condicions de contorn són fixes, en aquest treball s'han utilitzat estructures més simples per tal d'avaluar la influència d'aquestes condicions de contorn en la seva resposta dinàmica. S'han utilitzat discos submergits i confinats en aigua per a demostrar experimentalment els efectes de les distàncies axials i radials a superfícies rígides i flexibles, els efectes de la rotació i els efectes dels modes acústics del medi fluid en el seu comportament dinàmic. També s'han realitzat mesures experimentals en una gran turbina-bomba i en una gran turbina Francis per a confirmar el coneixement adquirit amb els models simples. A més, s'han desenvolupat i validat models numèrics que prediuen la resposta dinàmica dels rodets de turbines hidràuliques. Aquesta tesi es presenta per compendi d'articles. Els articles que formen part de la tesi han estat publicats com a primer autor en revistes indexades al JCR per sobre del segon quartil. Aquests articles estan basats en la investigació sobre els models simplificats i estan adjuntats al final del document i comentats al llarg del mateix. En el document també s'explica la recerca que s'ha dut a terme en els diferents prototipus de turbines hidràuliques.
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Kerimoglu, Onur. "Influence Of Large Scale Atmospheric Systems On Hydorology And Ecology Of Turkish Lakes." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609272/index.pdf.
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Impacts of climatic changes on in-land waters of Turkey is a topic that has not been sufficiently investigated yet. In this study, some exploratory work have been performed to form the core of further studies on the subject. EOF (Empirical Orthogonal Function) analysis has been applied to SLP (Sea Level Pressure) field with a wide coverage (20-70N, 50W-70E). The dominant sources of variability in this atmospheric system have been shown to be driven by 3 circulation indices, NAO (North Atlantic Oscillation), EAWR (East Atlantic - West Russia) and EA (East Atlantic) patterns. Linkages between this atmospheric system and the hydro-meteorological properties (data compiled from governmental organizations) of major Turkish lake ecosystems has been investigated with use of ordinary correlation analysis and CCA (Canonical Correlation Analysis). The results revealed the heavy forcing of large scale SLP field on regional temperature and E--P (evaporation minus precipitation) fields. The 15-year data set of Lake Mogan, as the longest available found, was used to exemplify the approaches and methodologies that can be employed for understanding the influence of climate variability on biological properties of lakes. It was suggested that temperature and salinity, being effective on phytoplankton and zooplankton groups, mediate the climatic impacts in Lake Mogan.
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Dervis, Sheila. "The Independent Influence of Large Differences in Adiposity on Thermoregulatory Responses during Exercise." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31216.
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Currently no previous study has isolated the independent influence of body fat (BF) on thermoregulatory responses from the confounding biophysical factors of body mass and metabolic heat production (Hprod). Therefore, seven lean (L, BF:10.7 ± 4.1%) and seven non-lean (NL, BF:32.2 ± 6.4%) males matched for total body mass (TBM, L: 87.8 ± 8.5 kg, NL: 89.4 ± 7.8 kg; P= 0.73), cycled for 60 min in a 28.2 ±0.2˚C and 27 ± 10% RH room at i) a Hprod of 546 W; and ii) a Hprod of 7.5 W·kg lean body mass (LBM). Rectal (Tre) and esophageal (Tes) temperatures, and local sweat rate (LSR) were measured continuously; while whole body sweat loss (WBSL) was measured from 0-60 mins. At 546 W, changes in Tre (L: 0.74 ± 0.16ºC, NL: 0.83 ± 0.14ºC), mean local sweat rate (MLSR) based on an average of upper-back and forearm local sweat rates (L: 0.65 ± 0.25, NL: 0.59±0.12 mgcm-2min-1) and WBSL (L: 568 ± 28 mL, NL: 567 ± 29 mL) were similar (P>0.58). At 7.5 W·kg LBM, the L group had greater changes in Tre (L: 0.87 ± 0.16ºC, NL: 0.55 ± 0.11ºC), MLSR (L: 0.83 ±0 .38, NL: 0.41 ± 0.13 mgcm-2min-1) and WBSL (L: 638 ± 19 mL, NL: 399 ± 17 mL) (P<0.05). In conclusion, i) body fat does not independently alter thermoregulatory responses during exercise; ii) core temperature comparisons between groups differing in BF should be performed using a Hprod normalized for TBM, not LBM.
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Wang, Jinbo Ph D. Massachusetts Institute of Technology. "Instabilities of an eastern boundary current with and without Large-scale Flow Influence." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/68890.
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Thesis (Ph. D.)--Joint Program in Physical Oceanography (Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2011.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 221-227).
Eastern oceanic boundary currents are subject to hydrodynamic instability, generate small scale features that are visible in satellite images and may radiate westward into the interior, where they can be modified by the large-scale circulations. This thesis studies the stability of an eastern boundary current with and without the large-scale flow influence in an idealized framework represented by barotropic quasi-geostrophic dynamics. The linear stability analysis of a meridional current with a continuous velocity profile shows that meridional eastern and western boundary currents support a limited number of radiating modes with long meridional and zonal wavelengths and small growth rates. However, the linearly stable, long radiating modes of an eastern boundary current can become nonlinearly unstable by resonating with short trapped unstable modes. This phenomenon is clearly demonstrated in the weakly nonlinear simulations. Results suggest that linearly stable longwave modes deserve more attention when the radiating instability of a meridional boundary current is considered. A large-scale flow affects the short trapped unstable mode and long radiating mode through different mechanisms. The large-scale flow modifies the structure of the boundary current to stabilize or destabilize the unstable modes, leading to a meridionally localized maximum in the perturbation kinetic energy field. The shortwave mode is accelerated or decelerated by the meridional velocity adjustment of the large-scale flow to have an elongated or a squeezed meridional structure, which is confirmed both in a linear WKB analysis and in nonlinear simulations. The squeezed or elongated unstable mode detunes the nonlinear resonance with the longwave modes, which then become less energetic. These two modes show different meridional structures in kinetic energy field because of the different mechanisms. In spite of the model simplicity, these results can potentially explain the formation of the zonal jets observed in altimeter data, and indicate the influence of the large-scale wind-driven circulation on eastern boundary upwelling systems in the real ocean. Studies with more realistic configurations remain future challenges.
by Jinbo Wang.
Ph.D.
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Nolin, Anna Patricia, Erik Paul Arnold, Peter D. Cohen, Gina Eva Flanagan, and Henry J. Turner. "Framing Innovation: Do Professional Learning Communities Influence Acceptance of Large-Scale Technology Initiatives?" Thesis, Boston College, 2014. http://hdl.handle.net/2345/3832.
Full textAbstract:
Thesis advisor: Vincent ChoThesis advisor: Diana C. Pullin
This study explored the role of professional learning communities for district leadership implementing large-scale technology initiatives such as 1:1 implementations (one computing device for every student). The existing literature regarding technology leadership is limited, as is literature on how districts use existing collaborative structures such as professional learning communities (PLCs) to implement technology initiatives. This study examined how superintendents and their leadership teams expect educator collaboration and whether and how they connect these expectations to large-scale technology implementation. Specifically, the concept of professional learning communities (PLCs) and their constructs were studied as collaborative mechanisms designed to support educators implementing large-scale technology initiatives. This qualitative study employs a multiple case study method to explore how the use of collaborative structures supported large-scale technology implementation in five school districts. These respondents and their stories detail a unique moment in educational leadership as increasing numbers of districts seek to implement such large-scale initiatives in school systems. Study results highlight how superintendents use leadership planning and implementation teams to serve as PLCs at the district level. This study confirms that the collaborative constructs of the PLC do serve to assist in the implementation of large-scale technology implementations in school systems, but largely at the central office strategic planning level. Superintendents utilize these collaborative structures for personal learning as they design implementation but do not scale up such structures for use by all educators across the implementation or system. Recommendations are made for use of collaborative structures to create technology educator learning ecologies across school systems
Thesis (EdD) — Boston College, 2014
Submitted to: Boston College. Lynch School of Education
Discipline: Educational Leadership and Higher Education
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Whalen, Lisa Marie. "Supercontinental Inheritance and its Influence on Supercontinental Breakup: The Central Atlantic Magmatic Province and the Breakup of Pangea." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71423.
Full textAbstract:
The Central Atlantic Magmatic Province (CAMP) is the large igneous province (LIP) that coincides with the breakup of the supercontinent Pangea. Major and trace element data, Sr-Nd-Pb radiogenic isotopes, and high-precision olivine chemistry were collected on primitive CAMP dikes from Virginia (VA). These new samples were used in conjunction with a global CAMP data set to elucidate different mechanisms for supercontinent breakup and LIP formation. On the Eastern North American Margin, CAMP flows are found primarily in rift basins that can be divided into northern or southern groups based on differences in tectonic evolution, rifting history, and supercontinental inheritance. Geochemical signatures of CAMP suggest an upper mantle source modified by subduction processes. We propose that the greater number of accretionary events, or metasomatism by sediment melts as opposed to fluids on the northern versus the southern Laurentian margin during the formation of Pangea led to different subduction-related signatures in the mantle source of the northern versus southern CAMP lavas. CAMP samples have elevated Ni and low Ca in olivine phenocrysts indicating a significant pyroxenite component in the source, interpreted here as a result of subduction metasomatism. Different collisional styles during the Alleghanian orogeny in the North and South may have led to the diachroneity of the rifting of Pangea. Furthermore, due to a low angle of subduction, the Rheic Plate may have underplated the lithosphere then delaminated, triggering both the breakup of Pangea and the formation of CAMP.Master of Science
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Andersson, Per. "Radio Frequency Thermal Treatment of Liver Tumours : -Influence of Blood Perfusion and Large Vessels." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11548.
Full textAbstract:
Radio frequency ablation (RFA) is a commonly used minimally invasive method of treating liver cancer tumours which utilises RF current for heating tumour tissue up to a lethal temperature. RF current is generated by a power generator and applied to the tumour by an electrode which is inserted into the tumour either during percutaneous or open surgery.
RFA is a method that has great advantages compared to traditional surgical resection of tumours due to minimal invasiveness, it can be used for a greater number of patients and enables repeated treatments. Even though there are many advantages coupled to RFA there are still some problems and difficulties associated with the method. One of these problems is the cooling effect from large vessel blood flow within the liver, the so called heat sink effect.
The aim of this master thesis work has been to develop a theoretical finite element model of RFA within Comsol Multiphysics software. This theoretical model has been used to simulate blood perfusion effects on resulting ablation volume. The effects from different large vessel blood flow parameters has been investigated, these parameters are: blood flow velocity, blood vessel diameter and distance between blood vessel and RF electrode. A factorial design has been utilised to setup parameter levels for the different simulations. A linear- and a second degree regression model has been calculated based on simulation results. The parameter with largest impact on simulative ablation volume and the interaction effects between the parameters were determined from the regression model coefficients. In addition to this has two simulations been performed, modelling perfused- and unperfused liver tissue, in order to investigate the effects resulting from microvascular perfusion.
The result shows that the parameter with largest impact on simulative ablation volume are the distance, it was also shown that there are a small interactional effects between diameter and distance, where a small distance increases the effect from a varying diameter. Modelled microvascular perfusion was shown to give a decrease in simulative ablation volume. A shortage of this master thesis work is the lack of experimental verification of the developed model.
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Royle, Matthew. "Influence of coatings on ion release from large diameter metal-on-metal hip bearings." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/2974.
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The reduction of wear debris and metal ions from metal-on-metal (MoM) cobalt chromium molybdenum (CoCrMo) hip replacements is needed to help reduce the incidence of adverse tissue responses that cause the high clinical failure rate of these previously popular devices. In addition, infection following primary and revision hip joint replacement surgery is a major complication and has a serious impact on a patient's quality of life whilst putting an economic strain on the health care system; silver (Ag) has been used successfully in medicine as an antibacterial. A range of surface engineered CoCrMo surfaces were investigated for wear and ion release using up to 4 million cycles (Mc) of hip simulator wear testing. Wear testing was performed using both standard acetabular orientation (35°) and more clinically adverse orientation (60°). Bearings were further challenged halfway through a wear test by subjecting the bearings to repeated head and cup luxation-reposition cycles (partial dislocation followed by reduction), and then the effects on subsequent wear and ion release investigated. Electron beam physical vapour deposition (EBPVD) was used to deposit chromium nitride (CrN) and Ag-doped CrN (CrN-Ag; 17, 41 and 51 wt.% Ag) coatings onto large diameter CoCrMo heads and cups. A number of CoCrMo hips were triode plasma nitrided (TPN) or treated using a duplex process of TPN followed by CrN coating. A total of 27 hip bearings were tested, which included current, clinically available MoM controls. All coatings acted as a barrier to Co dissolution using a static immersion model. CrN coating reduced wear rates by 58% - 100% compared to conventional MoM hips. Most notably there was a 99% reduction in Co release into the simulator lubricant when tested at both cups inclinations following 2.00 Mc, and a reduction of 89% when tested following a severe coating damage protocol. The MoM bearings showed signs of the selfpolishing phenomenon often associated with these types of bearings. Wear of the CrN-Ag bearings was similarly lower than the MoM controls in all wear phases, and the CrN-Ag coatings reduced Co release. Approximately 70% of the total Ag released over duration of the test was released over the first 0.17 Mc cycles of wear testing and was predominantly contained within wear particles rather than as ionic Ag. Adverse head and iii cup damage resulted in catastrophic failure of the 17 wt.% Ag coating, but the 51 wt.% Ag coating was the lowest wearing, indicating that the self-lubricating properties of Ag played a role in the tribological contact. The TPN bearings wore almost twice as much as the MoM controls and released twice the amount of Co; the duplex bearings wore almost 5-times more than the CrN coating and did not act as a barrier to Co release. The poor wear and ion release characteristics of the bearings that had been nitrided was attributed to nitrogen (N) having a stronger affinity for Cr than Co. Although the results of the present thesis indicate that both wear and ion release can be reduced by utilising EBPVD CrN-based surface coatings, it is likely that, given the current observations of high rates of failure of MoM implants, that surface engineering of MoM will not be embraced in the near future. However, there may be opportunities to exploit this technology in alternative orthopaedic implant applications.
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Hammond, Benjamin Michael. "Listening in large rooms : a neurophysiological investigations of acoustical conditions that influence speech intelligibility." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43373.
Full textAbstract:
Thesis (M.S.)--Massachusetts Institute of Technology, Whitaker College of Health Sciences and Technology, 1997.Includes bibliographical references (p. 34-37).
by Benjamin Michael Hammond.
M.S.
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Mathew, Sudha. "The influence of board attributes on firm risk in large publicly held UK firms." Thesis, Kingston University, 2013. http://eprints.kingston.ac.uk/27730/.
Full textAbstract:
This empirical study explores the effect of individual board attributes and combination of board attributes on managerial risk-taking in UK FTSE 350 firms. The recent financial crisis has focused the attention of regulators and all stakeholders of the firm on avoiding high risk-taking by top management. These concerns have been addressed in this study which examines the effect of board composition (board size, proportion of non-executive directors, and gender diversity), board leadership structure (presence of a powerful CEO and board executive ownership), board characteristics (age and tenure of board members) and board processes (board meeting attendance and frequency of audit committee meetings) on firm risk. This study aims to fill the gap in UK governance literature on how individual board attributes and a combination of board attributes (represented by the board composition index, the board leadership index, the board characteristics index and the board process index) associate with risk-taking in large UK corporations. Archival data is used in this study from a panel sample of 268 listed firms on the FTSE 350, over the period 2005 to 2010. On analysing the data, this study finds support for the hypothesis that a large board size decreases firm risk. The board composition index is found to be significantly negatively related to firm risk. A powerful CEO and executive director’s equity ownership is positively related to firm risk, and as expected the board leadership index is found to be significantly and positively associated with firm risk. Older board members with longer tenures reduce firm risk; and the board characteristics index is significantly and negatively related to firm risk. Better board meeting attendance and more frequent audit committee meetings reduces firm risk and as expected the board process index reduces firm risk. An overall board index constructed by combining the indices discussed above is found to be significantly associated with firm risk. This board index can be used as a board governance index to evaluate the effectiveness of the board in relation to firm risk. These findings can inform firms, investors and regulators that board attributes significantly affect firm risk and can be used as risk control mechanisms.
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Beckman, Ronald J. (Ronald James). "An Empirical Investigation of the Lobbying Influence of Large Corporations on Selected FASB Standards." Thesis, North Texas State University, 1988. https://digital.library.unt.edu/ark:/67531/metadc331951/.
Full textAbstract:
The Financial Accounting Standards Board is a private sector rule making body. Congressional inquiries have questioned whether the setting of accountin standards should remain in the private sector. Congressional critics have charged that the FASB has been captured by special interests and recommended that a governmental agency assume responsibility for standard setting. Specifically, critics charge that large corporations capture the Big Eight accounting firms who, in turn, have captured the FASB. Previous capture studies have concluded that the standard setting process is pluralistic and that the FASB has not been captured. The studies have focused on the influence of the Big Eight to determine if the FASB has been captured. They assume if standards do not reflect the expressed preferences of the Big Eight, then Congressional criticisms are invalid. The studies also assume a unidirectional influence between participants in the process and have ignored the intensity of preferences of the respondents.The purpose of this study is to provide a theoretical framework to specify selection of standards that would be expected to be subject to capture. This framework also recognizes the duo-directional nature of influence. The allegations of capture were tested using the standards selected in accordance with the theoretical framework. The following hypotheses were tested. HO_1 There is no positive statistically significant relationship between clients' preferences and an accounting firm's support for an outcome. HO_2 There is no positive statistically significant relationship between the preferences of large corporations and standards enacted by the FASB. HO_3 There is no positive statistically significant relationship between the preferences of the Big Eight firms and the standards enacted by the FASB. These hypotheses were tested for each Big Eight accounting firms and for each standard. A logist procedure was employed. The results of the tests, with three exceptions, indicate that any relationships that occurred happened by chance.
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Speer, Randy Lee Scribner Jay Paredes. "School performance teams' influence on school improvement in a large urban midwest school district." Diss., Columbia, Mo. : University of Missouri-Columbia, 2009. http://hdl.handle.net/10355/6774.
Full textAbstract:
The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Title from PDF of title page (University of Missouri--Columbia, viewed on March 29, 2010). Thesis advisor: Dr. Jay Scribner. Vita. Includes bibliographical references.
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TU, SHANSHAN. "Case Influence and Model Complexity in Regression and Classification." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1563324139376977.
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楊玉玲 and Yuk-ling Cecilia Yeung. "Xu Beihong [1895-1953] and Western influence: a study of his large-scale history paintings." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31213856.
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Al-Yaseen, Muzher Alowan Hussain. "The influence of large-grained material on the initiation of scour in consolidated cohesive soils." Thesis, Cardiff University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.276864.
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Huang, Shan Ph D. Massachusetts Institute of Technology. "Three essays on social influence in social advertising using a large-scale randomized field experiment." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118013.
Full textAbstract:
Thesis: Ph. D., Massachusetts Institute of Technology, Sloan School of Management, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references.
In this thesis, I examine the causal relationships among products, social influence and network-embedded human behaviors, in the context of social advertising. Social advertising places social cues (e.g., likes) in ads, utilizing the power of social influence (the effects of social cues in ads) to encourage ad engagement. I collaborate with a social networking app for a large-scale randomized field experiment on its social ads. In the experiment, the presence and the number of social cues were randomly assigned among 57 million ad-user pairs (more than 37 million subjects and across 71 products in 25 product categories). Integrating the experimental evidence and the data of individuals, products, ads and network structures, my studies address the incentives, magnitude, contagion patterns and viral factors (i.e., characteristics of products, behaviors and individuals) of social influence in social advertising and product adoptions.
by Shan Huang
Ph. D.
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Edwards, William J. "Impacts of the Zebra Mussel (Dreissena Polymorpha) on Large Lakes: Influence of Vertical Turbulent Mixing." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392139735.
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Yeung, Yuk-ling Cecilia. "Xu Beihong [1895-1953] and Western influence : a study of his large-scale history paintings /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19668375.
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Zorzi, Gianluca. "Numerical and experimental investigation of structural stiffness influence on ratcheting convection cell in granular soils under cyclic loading." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
Find full textAbstract:
Lateral cyclic loaded structures in granular soils can lead to an accumulation of irreversible strains by changing their mechanical response (densification) and forming a closed convective cell in the upper layer of the bedding. In the present thesis the convective cell dimension, formation and grain migration inside this closed volume have been studied and presented in relation to structural stiffness and different loads.
This relation was experimentally investigated by applying a cyclic lateral force to a scaled flexible vertical element embedded in dry granular soil. The model was monitored with a camera in order to derive the displacement field by means of the PIV technique.
Modelling large soil deformation turns out to be difficult, using mesh-based methods. Consequently, a mesh-free approach (DEM) was chosen in order to investigate the granular flow with the aim of extracting interesting micromechanical information.
In both the numerical and experimental analyses the effect of different loading magnitudes and different dimensions of the vertical element were considered. The main results regarded the different development, shape and dimensions of the convection cell and the surface settlements. Moreover, the Discrete Element Method has proven to give satisfactory results in the modelling of large deformation phenomena such as the ratcheting convective cell.
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Binney, Derek James. "Time to adopt knowledge management applications influences that affect individual decisions within a large information technology services organisation /." Phd thesis, Australia : Macquarie University, 2005. http://hdl.handle.net/1959.14/84346.
Full textAbstract:
Thesis (PhD)--Macquarie University, Macquarie Graduate School of Management, 2005.Bibliography: p. 241-260.
Introduction -- Literature review -- Development of the KM Spectrum -- Research design and method -- Results -- Discussion of results -- Conclusions and implications.
There is growing consensus in business research and practice that knowledge is increasingly the driver of competitive advantage. This thesis focuses on one aspect of the issue by identifying factors that affect the adoption of Knowledge Management (KM) applications by individuals in an IT Services organisation. The study considers the adoption decision by individuals once senior management have decided to invest in IT enabled KM applications (KMA) and KM systems (KMS). -- In the thesis, a framework, the KM Spectrum, is developed that differentiates between the varying characteristics of KMAs and frames the research. The thesis identifies 32 potential success factors for KM adoption proposed in the reviewed literature. These factors are related to the disciplines of organisational science, diffusion theory and adoption models. -- The methods used in the research: secondary data study, interviews and the electronic survey, combined with the representativeness of the survey sample, triangulate to provide confidence in the empirical understanding of the factors that influenced the adoption of KM within the specific knowledge-based organisation. -- In developing the theoretically-informed view of the factors that affect individual adoption of KMAs the research concludes that studying KM adoption at an individual level and across multiple KMAs identifies influences on adoption masked by adoption research conducted at a KM system and/or organisational level. By studying KM adoption at an individual level this thesis finds that the adoption by individuals of KMAs is primarily a diffusion phenomenon and that the factors that influence KMA adoption vary with the type of KMA being adopted. The empirically identified factors that affect adoption at an individual level build to a staged model of KM adoption, called the enhanced KM adoption (EKMA) model. The EKMA model represents four phases of KM adoption and differential influences that apply across the adoption lifecycle. Additionally, the study provides some indications of further research topics and proposes a checklist to assist practitioners with the deployment of KMAs and KM systems.
Mode of access: World Wide Web.
xx, 330 p. ill
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Campbell, Iona. "The potential influence of kelp exudates produced at large-scale kelp cultivation sites on microplankton assemblages." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=230135.
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With the global drive to find a renewable liquid fuel, attention has turned to macroalgae cultivation as a feasible approach for the production of a third generation biofuel. Additionally, the increasing demand for macroalgal extracts, and growing interest in their bioremediation role at aquaculture sites in an Integrated Multi-Trophic Aquaculture (IMTA) system, is driving the expansion of macroalgae cultivation across Europe. The suitability of kelp species to a large proportion of the European coastline, combined with high carbon, high value extract content and well-established cultivation techniques already demonstrated in Asia, makes them strong candidates for the expansion of macroalgae cultivation. Although large-scale kelp cultivation in Europe is still in its infancy, it is essential we understand the ecological impacts that such largescale sites may have on economically important coastal waters, before extensive production goes ahead. This thesis highlights the link between dissolved inorganic and organic matter exuded by candidate European kelp cultivation species Saccharina latissima and the microplankton assemblages. Laboratory incubation experiments using kelp exudates and microplankton were compared to fieldwork carried out at the world's largest kelp cultivation site in Rongcheng, China. Small-scale incubations have shown that resources in kelp exudates can be utilised by the bacterioplankton and mixotrophic Harmful Algal Species (HAS) of phytoplankton, and fieldwork at a working large-scale Asian kelp cultivation site, provides significant evidence impact of kelp cultivation on the bacterioplankton assemblage. Kelp exudates at large-scale cultivation sites will influence the microplankton assemblage, and this research is the first evidence of the impact that large-scale coastal aquaculture of kelp can have on bacterioplankton assemblages. A large knowledge gap in current fish, shellfish, invertebrate and IMTA aquaculture systems exists in understanding the fate of waste at cultivation sites in the microbial food web. Understanding the role of the microbial loop in aquaculture will be essential in managing the sustainability of aquaculture in an era of global expansion.
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Seery, Georgina. "How individual differences influence employees' experiences of major organisational change in a large UK insurance company." Thesis, Cranfield University, 2002. http://dspace.lib.cranfield.ac.uk/handle/1826/4592.
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This thesis examines employees' experiences of major organisational change, with an
emphasis upon examining how the personality traits Neuroticism and Extraversion, and
the personality disposition Work Locus of Control, influence these experiences. The
perspective of employees, who are the main recipients of major change initiatives, is not
well represented in the literature. Also, despite calls for research that addresses process
and context, existing literature on the role of individual differences in relation to
organisational change tends to be aprocessual and acontextual. The present research
seeks to overcome these shortcomings by adopting a longitudinal, real-time, qualitative
approach. The research elicited employees' perceptions of change as a major change
programme unfolded, and examined emerging patterns of employees' experiences in
relation to contextual and individual difference factors.
The research presents a picture of organisational change as unpredictable and emergent.
The research findings demonstrate that employees' experiences of change are varied and
suggest that these experiences are influenced by many factors at the personal, group and
organisational levels. The research shows that a change 'event' will elicit different types
of feelings and responses from the same individual over time, as the event unfolds.
Patterns of experience were found which suggested that personality factors, and
combinations of these factors, influenced the way aspects of change were perceived by
employees, and these perceptions appeared to influence employees' responses to change.
The present research contributes towards the change management literature by
confirming the view that change is 'messy', emergent and unpredictable, and by
presenting evidence to show how employees contribute towards the emergent nature of
this process. The research contributes towards the work psychology literature by
adopting an approach that contextualises research participants' responses, and presents an
account of change as an unfolding process. By focusing upon perceptions, the research is
able to offer explanations of how individual differences might influence employees'
experiences of major organisational change.
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Bann, Raymond Martin. "Factors that influence performance management at a large refinery in the North-West Province / R.M. Bann." Thesis, North-West University, 2009. http://hdl.handle.net/10394/4309.
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Watson, Kelly Joanne. "The seasonal influence of large aquatic plants at contrasting study sites on the River Frome, Dorset." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/12209/.
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This thesis utilised the River Frome, Dorset, as a study catchment within which to examine the seasonal effects of large aquatic plants, or 'macrophytes', on hydraulic roughness, water velocity, river stage and fine sediment distribution. The thesis formed part of LOCAR, a NERC thematic research programme, and was motivated by the need to provide empirical data to improve river management and to help achieve a compromise between vegetation management for flood control and for maintaining and maximising biodiversity. The thesis employed a hierarchical research design with linked data collection at macro-, meso-, and microscales. (i) Macroscale research employed archival River Habitat Survey data and primary river surveys to place the more detailed meso- and microscale work in context. The analyses revealed the existence of a distinct chalk river group and examined the place of the River Frome within this. This provided contextual information to aid extrapolation of the current findings and facilitates comparisons with previous and future research. (ii) Mesoscale research focused upon stage and discharge measurements, and grid-based measurements of hydraulic variables. The analyses showed that macrophytes can have demonstrable and quantifiable effects on hydraulic roughness and sediment storage, which causes seasonal change in the stage/discharge relationship. However, this effect varies according to channel morphology and riparian land use and is subject to the attainment of a critical biomass. (iii) Microscale analyses employed high-frequency turbidity probes to investigate sediment processes within macrophyte beds. Each vegetation patch acted as a unique sediment filter, the characteristics of which changed over the growing season, and varied with distance along the patch. The results also suggested that retention of fine sediment is size selective and varies according to plant architecture and in-channel location. The thesis findings imply that vegetation management must be approached with greater sensitivity to reach scale and sub-reach characteristics.
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Mitchell, Rebecca E. "Large scale influence of fishing, fish and habitat on sea urchin abundance on Fijian coral reefs." Thesis, University of Newcastle Upon Tyne, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401620.
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Burton, Kenneth R. Jr. "Influence of Antarctic oscillation on intraseasonal variability of large-scale circulations over the Western North Pacific." Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2310.
Full textAbstract:
Approved for public release, distribution is unlimitedThis study examines Southern Hemisphere mid-latitude wave variations connected to the Antarctic Oscillation (AAO) to establish connections with the 15- to 25-day wave activity in the western North Pacific monsoon trough region. The AAO index defined from the leading empirical orthogonal functions of 700 hPa height anomalies led to seven distinct circulation patterns that vary in conjunction with the 15- to 25-day monsoon trough mode. For nearly one half of the significant events the onset of 15- to 25-day monsoon trough convective activity coincided with a peak negative AAO index and the peak in monsoon trough convection coincided with a peak positive index. The remaining events either occur when the AAO is not significantly varying or when the AAO-related Southern Hemisphere mid-latitude circulations do not match 15- to 25-day transitions. When a significant connection occurs between the Southern Hemisphere mid-latitude circulations related to the AAO and the 15- to 25-day wave activity in the western North Pacific monsoon trough, the mechanism is via equatorward Rossby-wave dispersion. When wave energy flux in the Southern Hemisphere is directed zonally, no connection is established between the AAO and the alternating periods of enhanced and reduced convection in the western North Pacific monsoon trough.
Captain, United States Air Force
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Burton, Kenneth R. "Influence of Antarctic oscillation on intraseasonal variability of large-scale circulations over the Western North Pacific /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FBurton.pdf.
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Rezvani, Azadeh. "Large scale complex projects — beyond the 'iron triangle': An influence of soft skills on project success." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116591/1/Azadeh_Rezvani_Thesis.pdf.
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This thesis addresses the gap in existing knowledge about the influence of soft skills on the successful delivery of large scale complex projects, through an examination of the role played by personal attributes, competency and attitudes of project managers and employees. Evidence-based recommendations result from the thesis for managers and project leaders around the ways the success of large scale complex project organisations can be conceptualised and time and money can be saved.
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Di, Loreto Alessandro <1985>. "Nutraceutical Value of Durum Wheat: Influence of Environment and Genotype in a Large Scale Experimental Trial." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7531/1/Di_Loreto_Alessandro_TesiDottorato.pdf.
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Grain quality is well known as one of the most interesting breeding objectives in Mediterranean countries. It still has great importance in wheat markets because of the increased interest of the consumers for high-quality staple food such as pasta, couscous and various types of bread. The performance of many quality characteristics depends greatly on environmental conditions and, in this context, organic agriculture could guarantee a durum wheat material with high nutraceutical value for healthy food production and special dietary uses. Among organic wheat production, KAMUT® khorasan wheat (Triticum turgidum ssp. turanicum (Jakubz.)) has attracted great attention due to its specific nutritional and functional properties (antioxidant, anti-inflammatory, and prebiotic activities). The aim of this thesis was to evaluate the environmental and climatic effects on the nutritional and nutraceutical quality of organic durum and durum-type wheat varieties. The work was subdivided into three main sections aimed at understanding the dynamic affecting the accumulation of nutritional and functional compounds in wheat caryopsis of durum and durum type wheat varieties. The first two section provide a complete characterization of KAMUT® khorasan grain. This is a distinctive study: first a collection of the same organically grown genotype collected during two decades of cultivation was characterized for nutritional and functional properties; then the investigation has shifted to the same crop harvested in a vast region (180000 km2), including several different environments. In the third section 24 old and modern durum and durum-type wheat varieties, cropped in the same location and growing season, were analyzed in order to determine and compare the phenolic composition. Results obtained gives a fundamental understanding of durum wheat grains composition in terms of nutrient and bioactive compounds.
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Di, Loreto Alessandro <1985>. "Nutraceutical Value of Durum Wheat: Influence of Environment and Genotype in a Large Scale Experimental Trial." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7531/.
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Grain quality is well known as one of the most interesting breeding objectives in Mediterranean countries. It still has great importance in wheat markets because of the increased interest of the consumers for high-quality staple food such as pasta, couscous and various types of bread. The performance of many quality characteristics depends greatly on environmental conditions and, in this context, organic agriculture could guarantee a durum wheat material with high nutraceutical value for healthy food production and special dietary uses. Among organic wheat production, KAMUT® khorasan wheat (Triticum turgidum ssp. turanicum (Jakubz.)) has attracted great attention due to its specific nutritional and functional properties (antioxidant, anti-inflammatory, and prebiotic activities). The aim of this thesis was to evaluate the environmental and climatic effects on the nutritional and nutraceutical quality of organic durum and durum-type wheat varieties. The work was subdivided into three main sections aimed at understanding the dynamic affecting the accumulation of nutritional and functional compounds in wheat caryopsis of durum and durum type wheat varieties. The first two section provide a complete characterization of KAMUT® khorasan grain. This is a distinctive study: first a collection of the same organically grown genotype collected during two decades of cultivation was characterized for nutritional and functional properties; then the investigation has shifted to the same crop harvested in a vast region (180000 km2), including several different environments. In the third section 24 old and modern durum and durum-type wheat varieties, cropped in the same location and growing season, were analyzed in order to determine and compare the phenolic composition. Results obtained gives a fundamental understanding of durum wheat grains composition in terms of nutrient and bioactive compounds.
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Fu, Xiao. "The influences of budgetary system in a selection of large Chinese companies in the industry of electronic household appliances." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3644/.
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Budgetary control has been used and researched for years by both Western academics and practitioners. In China, it is re-emerging as a tool to implement management control, but might be used in different ways both in terms of understanding and operation. The research objective of this thesis is to examine the applicability of Western theories of change in management accounting in the context of budgeting in Chinese corporations. Challenges can exist because of the differences between Western assumptions and Chinese reality. The current thesis focuses on difficulties Chinese companies encounter in practical and deeper ideological ways: firstly, Western market-based ideology conflicts with an ideology which has been shaped by central-planning for decades; secondly, difficulties stem from the different cultural context of China which emphasizes hierarchical politeness, kinship ties, trust based on personal relationships, collectivism and social harmony, diligence and individual modesty, and less developed modern legal regulatory systems – these all contribute to China’s own way of doing things. This thesis also focuses on the transition process in China. Based on the assumption that budgetary changes do not happen in isolation from other management accounting changes, this thesis discusses these changes which synchronically took place while the case-study companies were implementing budgetary systems. This thesis adopts a longitudinal and in-depth qualitative case study research design, after adjustments made during the learning experience of the pilot study. It takes an interpretive and constructive philosophical underpinning, which allows the researcher to observe and understand the process of change, as well as the differences between Chinese practices and Western theories. Findings show that certain Western management accounting theories of change and Western theories of budgeting work in the case study Chinese corporations. Management accounting theories using an interpretive approach (for example, Berry et al., 1985; Scapens and Roberts, 1993; Ahrens and Chapman, 2002) lead the researcher to interpret management accounting practices from the practitioner’s points of view, and they have provided a range of terms to explain success or failure of management accounting changes. This approach together with Scapens et al.’s Institutional theory approach in management accounting have been found especially useful, in explaining the differences between Chinese vs. Western context. Furthermore, the contingency theory approach in management accounting gives a ‘platform’ which allows the researcher to assess a wide range of possible factors and their relationships with budgetary systems in studied companies. This approach is found useful in this thesis to present changes in other management accounting perspectives. Last but not least, this thesis finds existing Western literature in technical perspective of budgetary objectives, budgetary evaluation and participation, and budgetary effectiveness useful in a different context of China. By describing the change management process, an aspect which is not addressed frequently in the research literature, this thesis argues that to sufficiently understand Chinese companies’ budgetary changes, one also needs to understand unique cultural, social-economical and religious circumstances, and to adjust literature and methodology to adapt to these circumstances. This thesis provides an empirical experience concerning these issues. This thesis contributes to the understanding of management accounting change in China, and the tension which exists when Chinese companies are moving into Western management accounting practices.
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Cao, Shen. "Size effect and the influence of longitudinal reinforcement on the shear response of large reinforced concrete members." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ58765.pdf.
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Moormann, Tom E. "The influence of organizational identification on member responses in the context of large-scale organizational change events." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/29345.
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Kemble, Rebecca Jane Thornley. "Antioxidants and natural anti-cancer agents in the large bowel and the influence of intestinal microbial fermentation." Thesis, Robert Gordon University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311796.
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Veiga, Sandro Miguel Ferreira. "The influence of oceanic and atmospheric large-scale variabilities on the Atlantic Meridional Mode decadal time scale." Instituto Nacional de Pesquisas Espaciais (INPE), 2018. http://urlib.net/sid.inpe.br/mtc-m21c/2018/06.19.17.40.
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The Atlantic Meridional Mode (AMM) is a prominent coupled ocean-atmosphere mode of variability that manifests itself in the tropical Atlantic, mainly in the boreal spring although in some years it maintains itself active throughout the boreal summer and fall. The AMM impacts in continental land regions are due to its modulation of the Intertropical Convergence Zone, which tends to be located over the warmer hemisphere during the AMM peak phase. It also influences the conditions in the Atlantic hurricane Main Development Region. Many AMM features remain to be understood, from what determines its dominant decadal variability to the complex physical processes that sustain it. In this study, it is investigated the influence of the Atlantic Ocean variability and atmospheric large-scale variabilities on the dominant decadal periodicity that characterizes the AMM. Since we are interested in investigating the link between AMM and different phenomena at decadal time scale, observational and reanalysis datasets consisting of long record are used in this study. Through statistical analysis, it is shown that the sea surface temperature decadal variability in the Atlantic Ocean is linked to the AMM by the AMO. The AMO precedes the AMM. To further understand the ocean influence, the ocean heat content (0300m) decadal variability is analyzed. The results show that there is no significant relationship between the ocean heat content and the AMM. Regarding the atmospheric large-scale variabilities, it is concluded that El Niño-Southern Oscillation and the Interdecadal Pacific Oscillation do not significantly impact the AMM on decadal time scale. In this work is shown that the NAO is an important external forcing on the AMM, both at interannual and decadal time scale. In order to reinforce the conclusions, data from CMIP5 models are also used. The new version of the Brazilian Earth System Model (BESM-OA2.5) is one of the models used. Therefore the evaluation of its historical simulation is presented. The last topic studied is related to the potential changes of the AMM in a perturbed climate scenario. To this purpose, the idealized 4×CO2 experiments performed by four models are used. Two models show that the AMM maintains its spatio-temporal pattern under a perturbed climate scenario, while the Atlantic Meridional Overturning Circulation changes profoundly its structure.O Modo Meridional do Atlântico (MMA) é um modo de variabilidade importante do sistema acoplado oceano-atmosfera que se manifesta no Atlântico tropical, principalmente na primavera boreal, embora em alguns anos se mantenha ativo durante o verão e outono boreal. Durante as sua fase de pico, o MMA impacta as regiões continentais devido à sua modulação da Zona de Convergência Intertropical, que tende a estar localizada sobre o hemisfério com águas mais quentes e também por sua influência nas condições da Região Principal de Desenvolvimento de furacões do Atlântico. Muitas características da MMA ainda carecem de compreensão, desde a razão que determina sua dominante variabilidade decenal até aos complexos processos físicos que o sustentam ativo. Neste estudo, investigou-se a influência da variabilidade do Oceano Atlântico e das variabilidades atmosféricas de larga-escala na periodicidade dominantemente decenal que caracteriza o MMA. Uma vez que o interesse se prende em investigar as relações entre o MMA e diferentes fenômenos na escala decenal, são utilizados neste estudo dados observacionais e de Reanálise com longo registro. Através de análise estatística, mostra-se que a variabilidade decenal da temperatura da superfície do mar no Oceano Atlântico está ligada à MMA pela Oscilação Multidecenal do Atlântico (OMA). A OMA precede o MMA. Para entender melhor a influência do oceano, a variabilidade decenal do conteúdo de calor oceânico (0 a 300m) é analisada. Os resultados mostram que não há relação significativa entre a variabilidade do conteúdo de calor oceânico e o MMA. Em relação às variabilidades atmosféricas de larga-escala, conclui-se que o El Niño-Oscilação do Sul e a Oscilação Interdecenal do Pacífico não afetam significativamente o MMA na escala de tempo decenal. Neste trabalho é mostrado que a Oscilação do Atlântico Norte é um forçamento externo importante no MMA, tanto na escala de tempo interanual quanto decenal. Para reforçar as conclusões, mesmas análises são efetuadas utilizando dados de modelos do CMIP5. Dentre esses modelos é utilizada a nova versão do Modelo Brasileiro do Sistema Terrestre (BESM-OA2.5). Dedica-se um capítulo para a avaliação da rodada histórica do BESM-OA2.5. O último tópico estudado está xiv relacionado às possíveis mudanças do MMA em um cenário climático perturbado. Para este propósito são utilizados experimentos 4×CO2 realizados por quatro modelos. Dois modelos mostram que o MMA mantém seu padrão espaço-temporal sob um cenário climático perturbado, no qual a Circulação Meridional de Revolvimento do Atlântico altera profundamente sua estrutura.
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Hagerfors, Erika. "Formation of Sulphides in the Canadian High Arctic Large Igneous Province; Testing the Influence of Sedimentary Rocks." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-357415.
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Large Igneous Provinces (LIPs) form during short-lived pulses of extensive magmatic activity. LIPs are known for their ability to affect global climate as well as for their Ni-Cu-PGE ore potential. A key factor that controls the intensity of the climate impact of a LIP and its ore potential is the assimilation of volatile-rich sedimentary host rocks. Magmas of the High Arctic Large Igneous Province (HALIP), exposed in the Arctic, intruded volatile-rich black shales, carbonates and evaporites in the Canadian Arctic Islands, offering a great opportunity for studying magma-sediment interaction. The purpose of this study is to test whether assimilation of sedimentary sulphide can promote sulphide immiscibility in magma and thus aid formation of Ni-Cu-PGE ore bodies. This is done by analysing sulphur isotopes in pyrite grains hosted in a HALIP dolerite sill, which was emplaced into black shale, by using Secondary Ion Mass Spectrometry (SIMS). Four dolerite samples are analysed; two coming from the lower contact margin of the sill, one from 60 cm into the sill and one sample from a basaltic vein at the upper contact margin of the sill. A total of 14 pyrite grains (n = 246 individual SIMS spot analyses) were analysed for their sulphur isotope ratios. The results of the SIMS analyses show that all analysed sulphides have highly negative δ34S values ranging from -19.5 to -5.7‰ (average δ34S = -8.2 ± 0.83‰, 2SD), which therefore differ largely from that of the primitive mantle (0 ± 1.8‰). In order to put our four analysed dolerite samples into a broader context, δ34S data of our sulphides are compared with whole-rock δ34S and δ18O data from Hare Fiord shale and dolerite samples. The δ34S values of the sulphide samples from the sill typically trend toward the negative sulphur isotope composition of the sulphides in the surrounding shale, and the shale surrounding the sill experiences a loss of 32S near the contact of the sill. This indicates that sedimentary light sulphur (32S) has been locally incorporated into the sill by the surrounding shale, resulting in negative δ34S values in the magmatic sulphides. Since sulphide immiscibility in the Hare Fiord sill was triggered by assimilation of sulphur from host rock shale, the igneous rocks of the HALIP may be prospective for Ni-Cu-PGE mineralization, though more studies are needed. Furthermore, our results suggest that incorporation of crustal sulphur increased the volatile budget of HALIP magmas, which therefore could have contributed to a deterioration of the environmental conditions during the emplacement of the HALIP.Stora magmatiska provinser (på engelska Large Igneous Provinces, LIPs) är vulkaniska event då enorma mängder magma avsätts över en väldigt stor yta under ett, i ett geologiskt perspektiv, kort tidsspann. Dessa stora vulkaniska utbrott har väckt stort intresse då de är samtida med flera av de största massutdöendena i jordens historia, men också för att en viss typ av sulfidmalm rik på nickel, koppar och platinametaller (Ni-Cu-PGE malmer) ofta förekommer i provinsernas magmagångar och magmakammare. En viktig faktor som till stor del avgör en magmatisk provins påverkan på klimatet och potentiella malmförekomster är inkorporering av sedimentära bergarter till magman som, när de hettas upp, kan frigöra gaser rika på svavel och kol. I Kanadas arktiska öar trängde magma tillhörande den högarktiska magmatiska provinsen (HALIP) in i svart skiffer, karbonater och evaporiter, som är sedimentära bergarter rika på flyktiga ämnen. Denna magmatiska provins erbjuder därför stora möjligheter till att studera interaktionen mellan magma och sedimentära bergarter. Syftet med denna studie är att testa om inkorporering av sedimentärt svavel kan främja bildandet av sulfidsmälta i magma och därigenom bidra till bildandet av sulfidmalmer. Detta görs genom att analysera svavelisotoper i sulfidmineral i prover från en magmagång, som trängde in i en skifferformation, tillhörande den högarktiska magmatiska provinsen i norra Kanada. Genom att analysera svavelisotopkvoten (δ34S) i sulfidmineral kan man få information om huruvida svavlet i mineralen är av sedimentärt ursprung (där skiffer generellt har negativa δ34S värden) eller om svavlet har δ34S värden liknande de från manteln (som har δ34S värden runt 0‰), vilket i så fall skulle innebära att magman inte har inkorporerat sedimentärt svavel. Genom att använda masspektrometri av typen SIMS analyseras totalt 14 sulfidmineralkorn (n = 246 individuella SIMS punkter) för deras svavelisotopkvoter. Resultatet av studien visar att alla analyserade sulfidmineral har mycket negativa δ34S värden mellan -19.5 och -5.7‰ (med ett δ34S medelvärde på -8.2 ± 0.83‰, två standardavvikelser). Genom att jämföra våra δ34S värden med δ34S och δ18O värden för andra prover från både magmagången och den omgivande skiffern kunde vi se att δ34S värdena för sulfidmineralen i de yttre delarna av magmagången har liknande negativa värden som den omgivande skiffern, och att δ34S värdena för skiffern närmast magmagången är mer positiva. Detta tyder på att sedimentärt svavel i kontakten mellan magmagången och skiffern har blivit inkorporerat i magman från den omgivande skiffern. Våra resultat tyder därför på att sulfidmineralen i våra prover från magmagången bildades genom assimilering av svavel från den omgivande skiffern. Detta innebär i sin tur att den kanadensiska högarktiska magma provinsen potentiellt kan vara en källa för sulfidmalm, även om ytterligare studier behövs. Dessutom visar våra resultat att inkorporering av sedimentärt svavel förmodligen ökade de vulkaniska gaserna i magman, vilket kan ha bidragit till klimatförändringar relaterade till den vulkaniska aktiviteten av den högarktiska magmatiska provinsen.
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PERROT, JULIE. "Simulation d'enregistrements large-bandes : influence des structures heterogenes a la source sismique dans le diagramme de rayonnement." Nice, 1994. http://www.theses.fr/1994NICE4735.
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Le developpement des sismographes large-bandes apporte plus de details dans la forme d'onde permettant une analyse plus precise du modele de rupture et du modele structural autour de la source. Les modeles de terre a symetrie spherique ne suffisent pas toujours pour modeliser les sismogrammes. Ainsi, nous avons developpe le trace de rai hybride qui nous permet de prendre en compte un milieu heterogene autour de la source. Ce trace de rai est dit hybride car il debute dans un milieu cartesien a 2-d permettant la description d'interfaces complexes et une variation laterale de la vitesse. A une profondeur donnee, le trace cartesien s'arrete pour continuer jusqu'a la station, dans un modele a symetrie spherique. L'influence d'une structure superficielle bidimensionnelle dans une zone de subduction a ete etudiee a l'aide d'exemples synthetiques. Le trace de rai a permis d'identifier le type de perturbation de la propagation de meme que les structures responsables de ces perturbations. Ainsi, le fond oceanique pente, associe a un fort contraste de vitesse entre l'eau et la croute oceanique, induit un decalage des angles d'incidence sur la sphere focale que nous avons appele distorsion azimutale de la sphere focale. Deux axes d'etude apparaissent pour modeliser les seismes. Le premier axe est l'etude structurale d'une region quand le processus de rupture est connu. Nous avons ainsi deduit un modele 2-d pour la region de vrancea en etudiant le seisme du 30 mai 1990 et sa replique du 31 mai 1990. Le deuxieme axe est l'etude de la source sismique, qui a pu etre contrainte dans le cas du seisme de cuba du 25 mai 1992 dont le contexte bathymetrique et structural est bien connu. Toutefois, pour certains seismes, tel que le seisme d'erzincan du 13 mars 1992, il reste difficile de distinguer dans les enregistrements large-bandes l'influence du processus de rupture de l'influence de la propagation dans un milieu complexe
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Wienin, Jean-Samuel. "Comportement élastoplastique anisotrope de tôles minces destinées à l'emboutissage : Influence des données de compression large sur l'identification." Paris, ENMP, 2001. http://www.theses.fr/2001ENMP1087.
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