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Sakellaridou, Irini. "A top-down analytic approach to architectural composition." Thesis, University College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504524.
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This thesis is an exercise in theory with an empirical exercise. It deals with the traditional architectural ideas of 'composition' and 'parti', and applies a formal analytic approach to them. It takes a top-down approach to the notion of 'composition', which tries to reflect the way architects think, and looks at the 'parti' as the deep structure of the building, which is abstract, global, and capable of many realisations. As a case study, 19 houses of Mario Botta are analysed. The purpose of the empirical exercise is to explore how far it is possible to produce an analytic construction of the notion of 'parti'. It asks: are there formal top-down themes which underly the composition of the houses and have to do with their relational structure? After the description of the houses a formal analysis of the identified themes takes place. These formal top-down themes are defined as rules. A distinction is made between the nature of the rule, the degree of its realisation and the domains (mass, elevations, plan) of its realisation. Formal analysis, thus, measures properties of the mass, the elevations and the plan. What analysis shows is that the interrelations of the rules define the 'parti'. Three phases are identified in the development of the 'parti' of the houses which show an evolution of it from combinations to structure. A distinction between a short and a long genotype for order is thus made, as well as a distinction between the intension and the extension of the rule seen as a relation. In the last part the thesis explores what these findings suggest towards theory building as well as implications for further research by addressing the notion of relation and by defining two different types of interrelations.
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Santhana, Krishnan Archanaa. "Top-down Approach To Securing Intermittent Embedded Systems." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/105128.
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The conventional computing techniques are based on the assumption of a near constant source of input power. While this assumption is reasonable for high-end devices such as servers and mobile phones, it does not always hold in embedded devices. An increasing number of Internet of Things (IoTs) is powered by intermittent power supplies which harvest energy from ambient resources, such as vibrations. While the energy harvesters provide energy autonomy, they introduce uncertainty in input power. Intermittent computing techniques were proposed as a coping mechanism to ensure forward progress even with frequent power loss. They utilize non-volatile memory to store a snapshot of the system state as a checkpoint. The conventional security mechanisms do not always hold in intermittent computing. This research takes a top-down approach to design secure intermittent systems. To that end, we identify security threats, design a secure intermittent system, optimize its performance, and evaluate our design using embedded benchmarks. First, we identify vulnerabilities that arise from checkpoints and demonstrates potential attacks that exploit the same. Then, we identify the minimum security requirements for protecting intermittent computing and propose a generic protocol to satisfy the same. We then propose different security levels to configure checkpoint security based on application needs.
We realize configurable intermittent security to optimize our generic secure intermittent computing protocol to reduce the overhead of introducing security to intermittent computing. Finally, we study the role of application in intermittent computing and study the various factors that affect the forward progress of applications in secure intermittent systems. This research highlights that power loss is a threat vector even in embedded devices, establishes the foundation for security in intermittent computing.Doctor of Philosophy
The embedded systems are present in every aspect of life. They are available in watches, mobile phones, tablets, servers, health aids, home security, and other everyday useful technology. To meet the demand for powering up a rising number of embedded devices, energy harvesters emerged as a solution to provide an autonomous solution to power on low-power devices. With energy autonomy, came energy scarcity that introduced intermittent computing, where embedded systems operate intermittently because of lack of constant input power. The intermittent systems store snapshots of their progress as checkpoints in non-volatile memory and restore the checkpoints to resume progress. On the whole, the intermittent system is an emerging area of research that is being deployed in critical locations such as bridge health monitoring. This research is focused on securing intermittent systems comprehensively. We perform a top-down analysis to identify threats, mitigate them, optimize the mitigation techniques, and evaluate the implementation to arrive at secure intermittent systems. We identify security vulnerabilities that arise from checkpoints to demonstrate the weakness in intermittent systems. To mitigate the identified vulnerabilities, we propose secure intermittent solutions to protect intermittent systems using a generic protocol. Based on the implementation of the generic protocol and its performance, we propose several optimizations based on the needs of the application to securing intermittent systems. And finally, we benchmark the security properties using two-way relation between security and application in intermittent systems. With this research, we create a foundation for designing secure intermittent systems.
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Chandra, Naveen. "A top-down approach to delta-sigma modulator design /." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32955.
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This work presents the use of a new design methodology for the creation of analog integrated circuit components featuring optimization with Matlab and Simulink. This procedure allows circuit design to take place at the highest level of abstraction, and has the added advantage that designs can be implemented with currently used, and widely available tools. It results in building block requirements being specified prior to the undertaking of transistor level simulations, thereby saving much valued design time.Also presented are the issues behind the design of an audio-band, single bit switched capacitor delta-sigma modulator with 16 bits of performance. This begins with the filtering function design, continues with the realization in a low voltage standard CMOS process, and concludes with experimental measurements to gauge performance. The creation of the modulator was carried out using the proposed top-down design methodology, and its experimental performance is used to help validate the procedure.
In addition, the design and fabrication of a multibit DeltaSigma modulator including a novel internal DAC was carried out. The multibit DAC is based on encoding DC levels into digital PDM bitstreams, which are then decoded by a single analog filter. The use of a single filtering path reduces mismatch effects in the DAC. The functionality, performance, and limitations are explored by examining the experimental results of a 2.5 V, audio-band, 2nd order, 3-bit DeltaSigma modulator in a 0.25 mum CMOS process.
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Laurinen, P. (Perttu). "A top-down approach for creating and implementing data mining solutions." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514281268.
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Abstract
The information age is characterized by ever-growing amounts of data surrounding us. By reproducing this data into usable knowledge we can start moving toward the knowledge age. Data mining is the science of transforming measurable information into usable knowledge. During the data mining process, the measurements pass through a chain of sophisticated transformations in order to acquire knowledge. Furthermore, in some applications the results are implemented as software solutions so that they can be continuously utilized. It is evident that the quality and amount of the knowledge formed is highly dependent on the transformations and the process applied. This thesis presents an application independent concept that can be used for managing the data mining process and implementing the acquired results as software applications.
The developed concept is divided into two parts – solution formation and solution implementation. The first part presents a systematic way for finding a data mining solution from a set of measurement data. The developed approach allows for easier application of a variety of algorithms to the data, manages the work chain, and differentiates between the data mining tasks. The method is based on storage of the data between the main stages of the data mining process, where the different stages of the process are defined on the basis of the type of algorithms applied to the data. The efficiency of the process is demonstrated with a case study presenting new solutions for resistance spot welding quality control.
The second part of the concept presents a component-based data mining application framework, called Smart Archive, designed for implementing the solution. The framework provides functionality that is common to most data mining applications and is especially suitable for implementing applications that process continuously acquired measurements. The work also proposes an efficient algorithm for utilizing cumulative measurement data in the history component of the framework. Using the framework, it is possible to build high-quality data mining applications with shorter development times by configuring the framework to process application-specific data. The efficiency of the framework is illustrated using a case study presenting the results and implementation principles of an application developed for predicting steel slab temperatures in a hot strip mill.
In conclusion, this thesis presents a concept that proposes solutions for two fundamental issues of data mining, the creation of a working data mining solution from a set of measurement data and the implementation of it as a stand-alone application.
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Ma, Chuan. "A computational approach to top-down hierarchical supervisory control of DES." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0004/MQ45611.pdf.
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Brady, Eric Bonham. "Security Analysis: A Suggested Method for a Comprehensive Top-Down Approach." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/319941.
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Alhajj, Tarek. "TCSIM: a top-down approach to mixed-signal circuits and systems design." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19236.
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Design methodologies have evolved over the years, especially due to shrinking transistors in CMOS technology. This has encouraged the use of behavioural modelling in Matlab and Simulink over other less accurate or time consuming options for design and simulation, hence the development of TCSIM (Top-down Circuit Simulation In Matlab). The following components are modelled for this initial prototype: the output voltage limitation of operational amplifiers (opamps), the current limitation and parasitic capacitances of operational transconductance amplifiers (OTAs), the finite and nonlinear variation of on resistance in switches, and the nonideal behaviour of switched capacitor (SC) integrators. This is complemented by an analysis of the noise in these circuits. The models are verified with Cadence simulations and are shown to be both accurate and easy to map to the circuit level. It is also possible to optimize complete systems to efficiently meet specifications. The top-down methodology is demonstrated with the design of a delta-sigma analog-to-digital converter (ADC) to be both accurate and simple with TCSIM.Les methodologies de conception ont evolue au fil des annees, notamment en raison de la diminution de la taille des transistors dans la technologie CMOS. Ceci a favorise l'utilisation de la modelisation comportementale a l'aide de Matlab et Simulink, en remplacement des anciennes techniques qui etaient moins precises et demandaient plus de temps, ce qui a mene au developpement de TCSIM (Topdown Circuit Simulation In Matlab). Dans le cadre de ce prototype initial, les composantes suivantes ont ete modelisees: la limitation du voltage de sortie des amplificateurs operationnels (opamps), la limitation du courant et de la capacitance parasitique des amplificateurs-transconductance operationnels (OTAs), les variations finies et non-lineaire de la resistance des interrupteurs et le comportement non-ideal des integrateurs a condensateur commute. A ces modelisations s'ajoute une analyse du bruit dans ces circuits. Les modeles ont ete valides a l'aide de simulations dans Cadence. Ces simulations demontrent la precision des modeles mais aussi la facilite avec laquelle ils peuvent etre transposes au niveau circuit. Les modeles permettent l'optimisation de systemes complets en vue d'atteindre les specifications. La methodologie "top-down" est illustree a l'aide du design d'un convertisseur analogue-a-digital (ADC) delta-sigma. Le travail demontre la facilite avec laquelle ce design peut etre effectue grace a TCSIM.
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MARONGIU, DANIELA. "Top down and bottom up approach to self-assemble functional porous films." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2011. http://hdl.handle.net/10281/19116.
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A double simultaneous approach has been used in this doctorate work in order to
obtain complex multi-functional porous materials which can fi nd application in
bio-senors and lab-on-a-chip devices. On one side a method to achieve an increase
in the biological analyte detection within the mesoporous fi lms has been studied
through the application of deep x-ray lithography. This technique causes multiple
effects on the fi lm allowing to easily obtain the final desired structure. On the
other hand, wider pores than mesopores are required for the use of thin films as
a host for biological species, both due to the size requirement and for the easier
pores accessibility by mean of larger pores. The possibility to tune important
parameters such as pore size and shape and pore accessibility or selectivity has
been achieved in this work thus giving rise to multi-functional macro-mesoporous
materials in form of thin films.
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Andison, R. Mark. "Community futures : an evaluation of a top-down approach to community economic development." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29894.
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Communities throughout Canada have been faced with economic problems as a result of global restructuring, national and regional recessions, and a reduced demand for primary resource commodities. Over the course of the past decade those communities have begun to utilize various forms of community economic development (CED) strategies to overcome local economic problems. Although CED has been interpreted in various ways, resulting in no single readily identifiable definition of the term, a few concepts seem to prevail throughout most of the interpretations. Generally, CED is a process which involves community members banding together to initiate their own solutions to their common economic problems. There are, however, several impediments to this bottom-up approach to economic development Community Futures, a program sponsored by the federal government, has been designed to promote and facilitate CED by helping to remove some of those impediments.
The purpose of this thesis is to determine the extent to which a government program, namely Community Futures, can promote CED. A three part methodology has been used to accomplish this goal. First, a review of the relevant CED literature was performed to determine the goals of this approach to economic development and the impediments which exist. Four goals were identified: self-reliance, local control, institution-building, and equity. Self-reliance can be achieved through policies which decrease the level of economic leakages from the community and by recognizing the significance of the informal economy. Local control is a key element of the CED model. The goal is to increase the broader community's political control over the local economy through increased participation in community affairs. Local control
manifests itself in institution-building processes. Community-based institutions allow the community to better control its collective economic destiny and ensure equitable access to resources by all community members, through policies which decrease the level of economic leakages from the community and by recognizing the significance of the informal economy. Local control is a key element of the CED model. The goal is to increase the broader community's political control over the local economy through increased participation in community affairs. Local control manifests itself in institution-building processes. Community-based institutions allow the community to better control its collective economic destiny and ensure equitable access to resources by all community members. The impediments to bottom-up CED are: difficulty accessing financial resources, difficulty accessing information, and underdeveloped human resources. These are the impediments which government programs should attempt to overcome to facilitate the CED process.
The second part of the methodolgy consisted of a historic review of Canadian regional and local economic development policy to determine the nature of top-down economic development in Canada. This study found some of the relevant trends which have developed throughout the past decades, thus placing Community Futures into its appropriate historical context. Among the trends which emerged, we witness that policy: has been slow to develop; has lacked significant innovation; has traditionally been firmly controlled by the federal bureaucracy; has been influenced by political disputes at all levels; has been subject to the quantifiable, efficiency indicators which characterize the policy analysis approach to planning; and has regularly failed to meet its prescribed objectives.
Having analyzed the relevant theory and practice, the third part of the methodology studied the policy design of Community Futures to determine the program's ability to overcome the impediments to bottom-up CED and thereby facilitate the acheivement of the goals described by CED writers. Eligibility requirements of the program, such as unemployment and minimum levels of economic infrastructure, restrict the ability of the program to operate comprehensively and be universally available. Other eligibility requirements, such as minimum population requirements and ministerial approval requirements tend to be counterproductive to the local control objective of CED. A positive effect of the program is its ability to facilitate institution-building through the use of a community-based Community Futures Committee. However, the ability of that committee to develop a community-based plan is restricted by the limited nature of the program and by the onerous procedural guidelines set by CEIC.
Five broad conclusions concerning government involvement in CED programs are drawn from the literature review, the historical review, and the Community Futures case study. First, top-down strategies do, to a degree, have the potential to promote the goals of CED by addressing the impediments to the bottom-up approach. Second, the state's potential ability to promote comprehensive CED is impeded by the scale and national focus of top-down programs. Third, the government's sectoral structure also acts as an impediment to comprehensive top-down CED. Fourth, programs which are considered to be bureaucratic innovations may not be substantially different from those programs which preceded them. And finally, quantitative techniques of analysis and evaluation which characterize the policy analysis approach to planning are not capable of assessing the success of communities in achieving the ‘softer’ goals advocated by CED proponents.Applied Science, Faculty of
Community and Regional Planning (SCARP), School of
Graduate
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Lee, Jun-Youl. "A new approach of top-down induction of decision trees for knowledge discovery." [Ames, Iowa : Iowa State University], 2008.
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Ford, Lenzie Katherine. "Aβ's effect on long term memory : a top-down approach in Lymnaea stagnalis." Thesis, University of Sussex, 2015. http://sro.sussex.ac.uk/id/eprint/56239/.
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Amyloid β(Aβ)-induced synaptic and neuronal degeneration has been linked to the memory loss observed in Alzheimer's disease (AD). Although Aβ-induced impairment of synaptic and nonsynaptic plasticity is known to occur before any cell death, the links between these neurophysiological changes and the loss of specific types of behavioural memory are not fully understood. This thesis introduces a behaviourally and physiologically tractable animal model to the Aβ field for the first time, allowing for an in-depth approach to investigating Aβ-induced memory loss to be explored. In Aβ 1-42- and Aβ 25-35-treated Lymnaea stagnalis, retrieval of consolidated memory is disrupted after single-trial conditioning and single-injection of synthetic peptide. All succeeding work builds upon these findings using a top-down approach to investigate how Aβ disrupts retrieval of consolidated memory. Neuronal and synaptic health were monitored over a 24 hour in vivo incubation period and other memory stages were considered to determine time points of memory vulnerability. In brains that displayed healthy neurons and degenerating synapses, only animals that were exposed to Aβ during the 24-48 hour post-training time points exhibited any behavioural deficits. All other behavioural responses remained normal. Focus then shifted to investigate the peptide, as opposed to behaviour, involved in the above mentioned experiments. After systemic injection, Aβ was found to penetrate the ganglia, enter cells, and localise to specific organelles by 24 hours exposure. Aβ morphology and structure were also monitored over the 24 hour incubation period, using transmission electron microscopy (TEM), formic acid extraction, silver stain, and western blot. A large distinction between the two peptides, Aβ 1-42 and Aβ 25-35, became apparent at this point and even when peptides were prepared using the same procedure, their effects on behaviour became drastically different. However, it is interesting to note that although the two peptides used are very different, under different preparation procedures they will both produce predominantly tetramer species after 24 hour in vivo incubation. Finally, investigations into disruptions of molecular signalling cascades were considered in order to correlate these disruptions to the observed Aβ-induced behavioural deficits. Specifically, molecular, pharmacological, and biochemical techniques were used to measure protein alterations and post-translational modifications, and to inhibit key protein components, involved in cAMP response element binding protein (CREB)-signalling pathways in Lymnaea brain after 24 hour in vivo incubation of Aβ. Phosphorylated CREB was found to be decreased in both Aβ-treated groups; this decrease pattern was also found in active protein kinase A (PKA) experiments. These experiments correlate memory deficits to Aβ-induced disruptions in PKA and CREB activity; however, PKA inhibition experiments indicate that this molecular cascade disruption is not sufficient to cause the observed behavioural deficits. Taken together, this work correlates Aβ-induced changes from a wide range of components involved in learning and memory, with Aβ-disrupted memory recall. Importantly as well, this work develops Lymnaea stagnalis as a novel model for Aβ research and continues to distinguish the two commonly used peptides, Aβ 1-42 and Aβ 25-35. By linking the effects of Aβ on defined neuronal circuits to behavioural deficits in a novel model, the Aβ field has been further developed in an important and unique way.
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Thomas, Ellen. "Antecedents and Outcomes to Implementing a Top-down Approach to Platform Product Design." Diss., Temple University Libraries, 2010. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/99127.
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Business Administration/MarketingPh.D.
This dissertation investigates causal factors that lead to implementing a top-down approach to platform product design as well as performance outcomes from such a design. A top-down approach to platform product design requires intentional planning of a new platform-based product design during the new product development process, incorporating a level of modularity into the new design, and planning derivative products based on common subsystems and interfaces. A thorough review of literature was used to build a theory of platform product design founded on risks and benefits. Benefits are that platform design can drive revenue, introduce cost and time efficiencies, lead to more reliable products and offer managerial benefits in the form of adjacencies. Risks include increased costs and time to market for the first product, reduced revenue due to commonality, sub-optimal product design, and increased management complexity during the NPD process. A conceptual model was then developed encompassing antecedents, contributing factors, and market performance measures to implementing a top-down approach to new platform product design. The model was empirically tested in the context of U.S. manufacturing firms using data collected from 249 manufacturing product design managers. Respondents included managers from B2B firms and B2C firms as well as small and large firms. In order to test the model, a new continuous multidimensional measurement scale of top-down platform product design was developed. Results showed that market turbulence, technological turbulence, a product that is new to the market and competitive strategies of differentiation and design for supportability are positively related to platform design. Firm type - B2B versus B2C - and firm size - large firms versus small firms - was found to moderate this relationship. Regarding firm type, products that are new to the market are positively related to platform design for B2C firms, not B2B firms, while a competitive strategy of design for supportability is positively related to platform design for B2B firms, not B2C firms. Regarding firm size, a competitive strategy of design for supportability is positively related to platform design for large firms, not small firms. These findings suggest that an important predictor of top-down platform design is risk or uncertainty. Results also showed that top-down platform product design is positively related to both short term and long term market performance although this relationship is significantly greater for long term market performance. In the short-term, performance as measured by sales and market share was greater than performance as measured by profits. In the long-term, performance measured by sales and profits was greater than performance measured by market share. Organizational support in the form of management buy-in and cross-functional integration partially mediates the relationship between platform design and long term market performance. Finally, strategic flexibility was found to have an inverse relationship with top-down platform down. Firms lacking strategic flexibility were more likely to pursue a top-down platform design. This is in line with findings that suggest top-down platform design is undertaken when uncertainty is high and strategic flexibility is an advantage These findings contradict conventional wisdom in new product development literature and offer a better understanding of why platform design is important in a way that has not been previously defined.
Temple University--Theses
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Baselt, Daniel [Verfasser]. "Safe, Efficient, and Fair---A Top-Down Approach to Inter-Vehicle Communication / Daniel Baselt." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2013. http://d-nb.info/1038050219/34.
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Kim, Min Soo. "Template-assisted multilayer electrodeposition: An approach to top-down designable, surface/volumetric hierarchical nanostructures." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/54930.
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Driven by the emerging interest in the design and realization of structures with co-existing micro- and nanoscale features, various nanofabrication approaches are being developed. We show that the selective, conformal growth of a multilayer structure is a promising route for the controlled realization of various structures with size-hierarchy, including both surface (i.e., the structures of which functionalities are characterized by the interaction between their surface, and external systems, such as self-cleaning, superhydrophic substrates with dual-scale topography), and volumetric (i.e. composite materials of which functionalities rely on the intrinsic properties of nanostructures distributed throughout their volume, such as giantmagnetoresistance sensors) structures. This is realized based on a sequential multilayer electrodeposition guided by an insulating substrate with predesigned topography, referred to as template-assisted multilayer electrodeposition process. Various multiscale, multidimensional surface and volumetric hierarchical structures are demonstrated of which size scale of the nanostructures are defined by the individual layer deposition parameters, while their position and overall geometry are defined by that of the template. These structures include (1) large area (> 1 cm^2), planar, or non-planar surfaces comprised of anisotropic, nanoscale surface relief structures of wide-ranging size scale (10 nm-1 micron); and (2) thick (10-100 micron), volumetric composite material in which individual metallic layers of micron, or submicron scale thicknesses are electrically insulated from the adjacent layers by interlamination insulating layers of similar thicknesses. The utility of the fabricated structures is evaluated in a few potential application domains, i.e., nanolithography, self-cleaning, and high frequency magnetic devices.
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Holma, Tina, and Victoria Eriksson. "Topp till tå - Utvärdering av internkontroll enligt SOX 404, på en helt ny nivå." Thesis, Umeå University, Umeå School of Business, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-33286.
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Bishop, Wilsie. "Integrating IPE into an Academic Health Sciences Center: A Bottom-Up and Top-Down Approach." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/ijhse/vol3/iss2/2.
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Aynaud, Claude. "Localisation précise et fiable de véhicules par approche multisensorielle." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22637/document.
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La localisation d’un véhicule est une étape cruciale dans le développement des véhicules intelligents. Les recherches sur ce sujet ont connu un grand essor ces dernières années. L’accent est souvent porté sur la précision de la localisation, nous présentons ici une méthode de localisation sur carte existante dont l’objectif est d’estimer la position du robot non seulement de façon précise mais également de manière fiable. Pour ce faire, l’algorithme développé se présente en deux étapes principales : une étape de sélection et de perception des informations les plus pertinentes et une étape de mise à jour de la position estimée et de la fiabilité, cette dernière étape permet également de détecter et réparer ou éliminer les précédentes erreurs. La perception de l’environnement est réalisée à travers différents capteurs associés à des détecteurs spécifiques. L’humain utilise aussi différents capteurs pour se localiser et va intuitivement sélectionner le plus performant, s’il fait jour il utilisera ses yeux, sinon son oreille ou le toucher. Nous avons développé une approche similaire pour le robot qui tient compte des contraintes environnementales et de l’estimation actuelle pour sélectionner à chaque instant l’ensemble capteur, indice de la scène et détecteur le plus pertinent. La phase de perception, étant pilotée par un processus Top-Down, peut bénéficier d’informations déjà connues permettant ainsi de se focaliser sur l’indice recherché et d’améliorer les phases de détection et d’associations de données. Cette approche Top-Down s’appuie sur un réseau bayésien. Ce dernier permet de modéliser les interactions entre les différents événements qui se produisent en gérant l’incertitude. Il permet une prise en compte facile des différents événements. Par ailleurs le réseau bayésien présente une grande flexibilité pour l’ajout d’événements supplémentaires pouvant engendrer des non-détections (tels que dysfonctionnement de capteurs, conditions météorologiques, etc.). Les données de l’environnement sont rendues disponibles grâce à une carte géoréférencée préalablement fournie. Avec le développement de cartes disponibles facilement sur internet, cette façon de faire permet d’exploiter au mieux l’information déjà fournie. L’utilisation d’une carte géoréférencée permet d’avoir un référentiel commun entre tous les véhicules ou éléments de l’infrastructure facilitant ainsi l’échange d’informations et ouvrant du coup la possibilité d’interaction simplifiées dans le cas de flottes par exemple. Les résultats montrent que l’approche développée est pertinente pour une localisation précise et fiable aussi bien statique que dynamique. L’ajout de nouveaux capteurs se fait naturellement et sans nécessiter d’heuristique particulière. La localisation obtenue est suffisamment précise et fiable pour permettre des applications de conduite autonome utilisant, entre autres, cet algorithmeVehicle localization is a crucial step in the development of smart vehicles. The research in this domain has been growing in recent years. Generally, the effort is focused on the localization accuracy, we present here a localization method on existing map where the objective is to estimate the robot position not only with accuracy but also with confidence. To achieve this , the algorithm developed has two main steps : one, selection and perception of the most relevant informations and two, position estimation and confidence update. This last step also allows to detect and eliminate the previous errors. Environment perception is well achieved, thanks to different sensors associated with specific detectors. Humans use different senses, shifting automatically in order to localize themselves depending on the situation of the environment, for e.g if there is enough illumination we depend on eyes, else the ear or the touch otherwise. We have developed a similar approach for the robot that takes into account the specific environmental constraints and actual position estimation to select at each instant the most relevant set of sensor, landmark and detector. The perception step, led by a top-down process, can use already known informations allowing a focus on the searched landmark and an improvement of the detection and data associations steps. This top-down approach is well implemented, thanks to a Bayesian network. Bayesian network allows to model the interactions between the different probable events with management of the uncertainty. With this network, it is very easy to take into account those different events. Moreover, a Bayesian network has a great flexibility to take into consideration additional events that can cause false detections (like sensor failure, meteorological conditions and others). The environment data is obtained with a Georeferenced map (from GIS). With the already available maps on the internet, allows to exploit an already existing information. The use of a Georeferenced map facilitates the communication of informations between a vehicle and several other vehicles or with an element of the infrastructure, that can be very useful for multi vehicle coordination, for example. The results shows that the developed approach is very accurate and reliable for localization, whether static or dynamic, and can be applied for autonomous driving. Moreover, new sensors can be added at ease
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Bernay-Angeletti, Coralie. "Stratégie de perception active pour l'interprétation de scènes." Thesis, Clermont-Ferrand 2, 2016. http://www.theses.fr/2016CLF22710/document.
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La perception est le moyen par lequel nous connaissons le monde extérieur. C’est grâce à nos perceptions que nous sommes capables d’interagir avec notre environnement et d’accomplir de nombreuses actions du quotidien comme se repérer, se déplacer, reconnaître des objets et autres. Cette perception n’est pas juste passive comme peut l’être une sensation, elle comporte des aspects actifs. En particulier, elle peut être orientée dans un but précis, permettant de filtrer les données pour ne traiter que les plus pertinentes. Si la perception humaine est particulièrement efficace, la perception artificielle, elle, demeure un problème complexe qui se heurte à de nombreuses difficultés. Ainsi, les changements de conditions de perception comme des modifications de l’illumination ou des occultations partielles de l’objet à percevoir doivent pouvoir être gérées efficacement. Pour résoudre ces difficultés, s’inspirer de la perception humaine semble être une piste intéressante. Ce manuscrit propose un système de perception polyvalent et générique reposant sur une stratégie de perception active. Pour ce faire, nous proposons un algorithme Top-Down utilisant un modèle en parties. Le problème de perception est transformé en un problème d’estimation d’un vecteur de caractéristiques. La détection des différentes parties permet de réaliser cette estimation. Le système de perception proposé est un algorithme itératif multi-capteurs. À chaque itération, il sélectionne au mieux, en fonction des objectifs fixés par l’application, la partie à détecter ainsi que les meilleurs capteur et détecteur compatibles. Un réseau bayésien est utilisé pour prendre en compte les événements incertains pouvant survenir lors de ce processus comme la défaillance d’un détecteur ou la non existence potentielle d’une partie donnée. Un processus de focalisation à la fois spatiale et de caractéristiques permet d’améliorer la détection en augmentant le rapport signal sur bruit, en restreignant la zone de recherche pour une partie et en éliminant certains des candidats trouvés. Ce processus de focalisation permet aussi de réduire les temps de calcul et de restreindre l’influence des distracteurs. L’ajout de nouveaux capteurs, détecteurs ou parties se fait simplement. De plus, l’utilisation d’un réseau bayésien permet une grande flexibilité au niveau de la modélisation des événements pris en compte : il est facile de rajouter de nouveaux événements pour obtenir une modélisation plus réaliste. L’algorithme proposé a été utilisé pour plusieurs applications incluant de la reconnaissance d’objets, de l’estimation fine de pose et de la localisationPerception is the way by which we know the outside world. Thanks to our perceptions we are able to interact with our environment and to achieve various everyday life actions as locating or moving in an environment, or recognizing objects. Perception is not passive whereas sensations are, it has active components. In particular, perception can be oriented for a specific purpose allowing to filter data and to take care only of the most relevant. If human perception is particularly effective, artificial perception remains a complex problem with a lot of non solved difficulties. For example, changes of perception conditions as modification of illumination or partial occultation of the searched object must be effectively managed. This thesis proposes a system of perception based on a strategy of active perception which can adapt itself to various applications. To do it, we propose an algorithm Top-Down using a part-based model. The problem of perception is transformed into a problem of estimation of a characteristics vector. The detection of the different parts constituting the searched object allows to realize this estimation. The proposed perceptive system is an iterative and multi-sensors algorithm. In every iteration, it selects, at best, according to the application objectives, the part to detect and the best compatible sensor and detector. A bayesian network is used to take into account uncertain events which can arise during this process as detector failure or potential non existing part. A focus process consisting of a spatial focus and of a characteristics focus, improves the detection by restricting the search area, by improving the signal to noise ratio and by eliminating some erroneous candidates. This focus process also allows to reduce computation time and to restrict influence of distractors. Adding a part, a sensor or a detector is simple. Furthermore, the use of a bayesian network allows to be flexible in the events modelisation : it is easy to add new events to obtain a more realistic modelisation. The proposed algorithm has been used for several applications including object’s recognition, fine pose estimation and localization. So, it is multi-purpose and generic
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Ender, Tommer Rafael. "A Top-Down, Hierarchical, System-of-Systems Approach to the Design of an Air Defense Weapon." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/11570.
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Systems engineering introduces the notion of top-down design, which involves viewing an entire system comprised of its components as a whole functioning unit. This requires an understanding of how those components efficiently interact, with optimization of the process emphasized rather than solely focusing on micro-level system components. The traditional approach to the systems engineering process involves requirements decomposition and flow down across a hierarchy of decision making levels, in which needs and requirements at one level are transformed into a set of system product and process descriptions for the next lower level. This top-down requirements flow approach therefore requires an iterative process between adjacent levels to verify that the design solution satisfies the requirements, with no direct flow between nonadjacent hierarchy levels. This thesis introduces a methodology that enables decision makers anywhere across a system-of-systems hierarchy to rapidly and simultaneously manipulate the design space, however complex. A hierarchical decision making process will be developed in which a system-of-systems, or multiple operationally and managerially independent systems, interact to affect a series of top level metrics. This takes the notion of top-down requirements flow one step further to allow for simultaneous bottom-up and top-down design, enabled by the use of neural network surrogate models to represent the complex design space. Using a proof-of-concept case study of employing a guided projectile for mortar interception, this process will show how the iterative steps that are usually required when dealing with flowing requirements from one level to the next lower in the systems engineering process are eliminated, allowing for direct manipulation across nonadjacent levels in the hierarchy. For this system-of-systems environment comprised of a Monte Carlo based design space exploration employing rapid neural network surrogate models, both bottom-up and top-down design analysis may be executed simultaneously. This process enables any response to be treated as an independent variable, meaning that information can flow in either direction within the hierarchy.
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Merrell, Karen. "A Top-Down Proteomic Approach for the Discovery of Novel Serum Biomarkers of Pregnancy-Related Disease." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3117.pdf.
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Leroy, Gondy A. "Facilitating knowledge discovery by integrating bottom-up and top-down knowledge sources: A text mining approach." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280294.
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This dissertation aims to discover synergistic combinations of top-down (ontologies), interactive (relevance feedback), and bottom-up (machine learning) knowledge encoding techniques for text mining. The strength of machine learning techniques lies in their coverage and efficiency because they can discover new knowledge without human intervention. The output, however, is often imprecise and irrelevant. Human knowledge, top-down or interactively encoded, may remedy this. The research question addressed is if knowledge discovery can become more precise and relevant with hybrid systems. Three different combinations are evaluated. The first study investigates an ontology, the Unified Medical Language System (UMLS), combined with an automatically created thesaurus to dynamically adjust the thesaurus' output. The augmented thesaurus was added to a medical, meta-search portal as a keyword suggester and compared with the unmodified thesaurus and UMLS. Users preferred the hybrid approach. Thus, the combination of the ontology with the thesaurus was better than the components separately. The second study investigates implicit relevance feedback combined with genetic algorithms designed to adjust user queries for online searching. These were compared with pure relevance feedback algorithms. Users were divided into groups based on their overall performance. The genetic algorithm significantly helped low achievers, but hindered high achievers. Thus, the interactively elicited knowledge from relevance feedback was judged insufficient to guide machine learning for all users. The final study investigates ontologies combined with two natural language processing techniques: a shallow parser and an automatically created thesaurus. Both capture relations between phrases in biomedical text. Qualified researchers found all terms to be precise; however, terms that belonged to ontologies were more relevant. Parser relations were all precise. Thesaurus relations were less precise, but precision improved for relations that had their terms represented in ontologies. Thus, this integration of ontologies with natural language processing provided good results. In general, it was concluded that top-down encoded knowledge could be effectively integrated with bottom-up encoded knowledge for knowledge discovery in text. This is particularly relevant to business fields, which are text and knowledge intensive. In the future, it will be worthwhile to extend the parser and also to test similar hybrid approaches for data mining.
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Dejan, Mirčetić. "Унапређење top down методологије за хијерархијско прогнозирање логистичких захтева у ланцима снабдевања." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=107263&source=NDLTD&language=en.
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У докторату је предложен је нови модел за утврђивање деагрегационихпропорција у top down методологији за хијерархијско прогнозирање.Како би се утврдили показатељи рада новог приступа, извршена сутеоријска (симулациона студија) и емпиријска истраживања (студијаслучаја) више ешалонског дистрибутивног ланца. Резултати показују данови приступ значајно превазилази стандардне моделе top downметодологије. Такође, у докторату је тестиран и утицај хијерархијскихпрогноза на логистичке показатеље (просечне залихе и недостатакзалиха). Резултати показују да је нови модел остварио најмањинедостатак залиха приликом примене у стратегијама управљањазалихама. Поред наведеног, у докторату је тестирано и комбиновањеразличитих прогноза и истраживање утицаја особина временских серијана прецизност прогнозирања модела за хијерархијско прогнозирање.U doktoratu je predložen je novi model za utvrđivanje deagregacionihproporcija u top down metodologiji za hijerarhijsko prognoziranje.Kako bi se utvrdili pokazatelji rada novog pristupa, izvršena suteorijska (simulaciona studija) i empirijska istraživanja (studijaslučaja) više ešalonskog distributivnog lanca. Rezultati pokazuju danovi pristup značajno prevazilazi standardne modele top downmetodologije. Takođe, u doktoratu je testiran i uticaj hijerarhijskihprognoza na logističke pokazatelje (prosečne zalihe i nedostatakzaliha). Rezultati pokazuju da je novi model ostvario najmanjinedostatak zaliha prilikom primene u strategijama upravljanjazalihama. Pored navedenog, u doktoratu je testirano i kombinovanjerazličitih prognoza i istraživanje uticaja osobina vremenskih serijana preciznost prognoziranja modela za hijerarhijsko prognoziranje.
In this thesis, a new approach for determining disaggregating proportions inthe top down hierarchical forecasting methodology is proposed. In order toestimate the accuracy of the proposed approach, the simulation and casestudy are performed. Results demonstrate that the approach significantlyoutperforms standard top down approaches. Also, in this reserach the impactof hierarchical forecasts on logistics indicators (average stock and lack ofinventory) is researched. The results show that the new model achieved thesmallest lack of inventory in inventory management strategies. Likewise, inthis research, the ideas of combining the hierarchical forecasting models andquantifying the influence of time series characteristics on the accuracy ofhierarchical forecasting models, are tested. The results are encouraging andfurther researches are needed in order to reveal all possible benefits ofproposed ideas.
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Ladhari, Maroua. "Architecture générique de fusion par approche Top-Down : application à la localisation d’un robot mobile." Thesis, Université Clermont Auvergne (2017-2020), 2020. http://www.theses.fr/2020CLFAC052.
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La problématique qui va être abordée dans cette thèse est la localisation d’un robot mobile. Ce dernier, équipé de capteurs bas-coût, cherche à exploiter le maximum d’informations possibles pour répondre à un objectif fixé au préalable. Un problème de fusion de données sera traité d’une manière à ce qu’à chaque situation, le robot saura quelle information utiliser pour se localiser d’une manière continue. Les données que nous allons traiter seront de différents types. Dans nos travaux, deux propriétés de localisation sont désirées: la précision et la confiance. Pour pouvoir le contrôler, le robot doit connaître sa position d’une manière précise et intègre. En effet, la précision désigne le degré d’incertitude métrique lié à la position estimée. Elle est retournée par un filtre de fusion. Si en plus, le degré de certitude d’être dans cette zone d’incertitude est grand, la confiance dans l’estimation sera élevée et cette estimation sera donc considérée comme intègre. Ces deux propriétés sont généralement liées. C’est pourquoi, elles sont souvent représentées ensemble pour caractériser l'estimation retournée de la pose du robot. Dans ce travail nous rechercherons à optimiser simultanément ces deux propriétés.Pour tirer profit des différentes techniques existantes pour une estimation optimale de la pose du robot,nous proposons une approche descendante basée sur l’exploitation d’une carte environnementale définie dans un référentiel absolu. Cette approche utilise une sélection a priori des meilleures mesures informatives parmi toutes les sources de mesure possibles. La sélection se fait selon un objectif donné (de précision et de confiance), l’état actuel du robot et l’apport informationnel des données.Comme les données sont bruitées, imprécises et peuvent également être ambiguës et peu fiables, la prise en compte de ces limites est nécessaire afin de fournir une évaluation de la pose du robot aussi précise et fiable que possible. Pour cela, une focalisation spatiale et un réseau bayésien sont utilisés pour réduire les risques de mauvaises détections. Si malgré tout de mauvaises détections subsistent, elles seront gérées par un processus de retour qui réagit de manière efficace en fonction des objectifs souhaités.Les principales contributions de ce travail sont d'une part la conception d'une architecture de localisation multi-sensorielle générique et modulaire de haut niveau avec un mode opératoire descendant. Nous avons utilisé la notion de triplet perceptif qui représente un ensemble amer, capteur, détecteur pour désigner chaque module perceptif. À chaque instant, une étape de prédiction et une autre de mise à jour sont exécutées. Pour l’étape de mise à jour, le système sélectionne le triplet le plus pertinent (d'un point de vue précision et confiance) selon un critère informationnel. L’objectif étant d’assurer une localisation intègre et précise, notre algorithme a été écrit de manière à ce que l’on puisse gérer les aspects ambiguïtés.D'autre part, l'algorithme développé permet de localiser un robot dans une carte de l'environnement. Pour cela, une prise en compte des possibilités de mauvaises détections suite aux phénomènes d'ambiguïté a été considérée par le moyen d'un processus de retour en arrière. En effet, ce dernier permet d'une part de corriger une mauvaise détection et d'autre part d'améliorer l’estimation retournée de la pose pour répondre à un objectif souhaitéThe issue that will be addressed in this thesis is the localization of a mobile robot. Equipped with low- cost sensors, the robot aims to exploit the maximum possible amount of information to meet an objective set beforehand. A data fusion problem will be treated in a way that at each situation, the robot will select which information to use to locate itself in a continuous way. The data we will process will be of different types.In our work, two properties of localization are desired: accuracy and confidence. In order to be controlled, the robot must know its position in a precise and reliable way. Indeed, accuracy refers to the degree of uncertainty related to the estimated position. It is returned by a fusion filter. If, in addition, the degree of certainty of being in this uncertainty zone is important, we will have a good confidence contribution and the estimate will be considered as reliable. These two properties are generally related. This is why they are often represented together to characterize the returned estimate of the robot position. In this work, our objective is to simultaneously optimize these two properties.To take advantage of the different existing techniques for an optimal estimation of the robot position, we propose a top-down approach based on the exploitation of environmental map environmental map defined in an absolute reference frame. This approach uses an a priori selection of the best informative measurements among all possible measurement sources. The selection is made according to a given objective (of accuracy and confidence), the current robot state and the data informational contribution.As the data is noisy, imprecise and may also be ambiguous and unreliable, the consideration of these limitations is necessary in order to provide the most accurate and reliable robot position estimation. For this, spatial focusing and a Bayesian network are used to reduce the risk of misdetection. However, in case of ambiguities, these misdetections may occur. A backwards process has been developed in order to react efficiently to these situations and thus achieve the set objectives.The main contributions of this work are on one side the development of a high-level generic and modular multi sensory localization architecture with a top-down process. We used a concept of perceptual triplet which is the set of landmark, sensor and detector to designate each perceptual module. At each time, a prediction and an update steps are performed. For the update step, the system selects the most relevant triplet (in terms of accuracy and confidence) according to an informational criterion. In order to ensure an accurate and relaible localization, our algorithm has been written in such a way that ambiguity aspects can be managed.On the other side, the developed algorithm allows to locate a robot in an environment map. For this purpose, the possibility of bad detections due to ambiguity phenomena has been taken into account in the backward process. Indeed, this process allows on the one hand to correct a bad detection and on the other hand to improve the returned position estimation to meet a desired objective
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Bicakci, Kemal. "On The Efficiency Of Authentication Protocols, Digital Signatures And Their Applications In E-health: A Top-down Approach." Phd thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1101500/index.pdf.
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Choosing an authentication protocol or a digital signature algorithm becomes more challenging when performance constraints are of concern. In this thesis, we discuss the possible options in a top-down approach and
propose viable alternatives for the efficiency criteria.
Before all the technical discussions, we argue that identifying
prerequisites, threats and risks on an organizational context has utmost importance so that effective solutions can be delivered at a reasonable cost. For instance, one approach to solve the performance problem is to relax the security requirements if it is allowable and use one-time
passwords as the more efficient entity authentication protocol. SCOTP is the first protocol proposed in this study which improves the security and flexibility of one-time passwords.
After requirements are set up, another high-efficiency solution is based on new designs of improved protocols. These new protocols might utilize the trade-offs between efficiency of distinct system parameters such as communication versus computational load. SAOTS is our new protocol designed to improve the performance and increase the round efficiency of server-assisted signature protocols.
With an example in e-health, we also demonstrate that efficiency can be provided on the implementation level as well, the last step in the chain. EVEREST is the third proposal in this thesis which improves the real-time efficiency of digital signatures concerning the fact that the medical images are huge in size and to verify the signature a considerable amount of time is spent to compute the hash of the image file.
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Bıçakçı, Kemal. "On the efficiency of authentication protocols, digital signatures and their applications in E-Health a top-down approach /." Ankara : METU, 2003. http://etd.lib.metu.edu.tr/upload/1101500/index.pdf.
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PIRAS, VALENTINA. "Identification of potential disease biomarkers in tissues and saliva by an integrated Top-down and Bottom-up proteomic approach." Doctoral thesis, Università degli Studi di Cagliari, 2017. http://hdl.handle.net/11584/249596.
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Top-down proteomics has been applied to investigate qualitative and quantitative modifications of the acidic soluble salivary proteome/peptidome in patients affected by auto-inflammatory periodic fever syndromes associated to mutations of pyrin gene. Recurrent episodes of fever are accompanied by abdominal, chest and joint pain, swelling, and aphthous-like oral ulceration; the most severe complication, if disease is untreated, is the development of amyloidosis. 21 adult patients were enrolled and compared with 27 sex/age matched healthy controls, 6 patients with Familial Mediterranean Fever (FMF), and 15 with Unclassified fever syndrome (Uc). Genetic analysis revealed a not correspondence between clinical classification and nonsense or missense mutations in the MEFV gene encoding pyrin, and three patients did not carry mutations. Results highlighted in both FMF and Uc patients significant decreased levels of α-defensins 2, 3, and 4, involved in innate immune-defense, and increased levels of anti-inflammatory proteins, like cystatin C, glutathionylated and cysteinylated cystatin B, antileukoproteinase, and glutathionylated S100A9, with respect to controls. Uc patients showed higher levels of some peptides and proteins involved in the oral cavity protection than both FMF patients and healthy controls. These peptides/proteins were: Histatin 1 (Hst-1), mono- and non-phosphorylated; Hst-3, 5, and 6; di-, mono- and non-phosphorylated proteoforms of statherin and its des1-9 fragment; P-C peptide and the di-, mono- and non-phosphorylated proteoforms of the acidic Proline-Rich Proteins, PRP1 and PRP3. Interestingly, Uc patients exhibited a hypo-phosphorylation of Hst-1, statherin, PRP1 and PRP3 suggesting a lower activity of the Fam20C kinase responsible for their phosphorylation. In the second study 22 patients submitted to surgical resection of colo-rectal tumors or adenomas have been analysis. Two different regions of the tumor have been explored for each patient: the superficial tumor region (S), and the deepest region of the tumor, corresponding to invading tumor cells (D). From the same patient, normal mucosa (H) was also collected. Structural characterization of peptides/proteins was performed by high-resolution RP-HPLC-ESI-MS/MS by a top-down and a bottom-up approach. Quantification of peptides and proteins was performed by low-resolution RP-HPLC-ESI-MS with a label-free method based on the area of the extracted ion current (XIC) peaks. Specific multiply-charged ions of each peptide/protein were selected avoiding common m/z values for coeluting species. The following peptides and proteins belonging to the thymosin family were characterized and quantified: thymosin β4 (Tβ4), thymosin β10 (Tβ10) and derivates. Moreover, we identified two derivatives of Isoform I of pro-thymosin α (proTα1, 111 amino acid residues), corresponding to the N-terminally truncated form at the second residue, and the fragment 2-36, and parathymosin (102 amino acid residues) N-terminally acetylated after removal of the Met residue. The high-resolution MS/MS data allowed us characterizing other components, such as the ubiquitin, the SH3 domain-binding protein 1 (SH3BP-1), the fatty acid-binding protein 1 (FABP1), and its natural variant with the single substitution Thr94>Ala, detected in the form Met1-missing and N-terminally acetylated. Other proteins and peptides detected in the samples are still pending for identification. Quantitative analysis showed that Tβ4 was more concentrated in the tumor D tissue with respect to the tumor S (p = 0.0004), and to the normal tissue H (p = 0.03). Tβ4 concentration did not show significant difference in S and H tissues. Also Tβ10 exhibited the same trend: more concentrated in D with respect to S (p = 0.01), none difference between S and H. The high concentration of Tβ4 in the invasion front of the tumor is in agreement with an involvement of the peptide in the epithelial-mesenchymal transition of CRC.
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Alloul, Adam. "Top-down and bottom-up excursions beyond the standard model : the example of left-right symmetries in supersymmetry." Phd thesis, Université de Strasbourg, 2013. http://tel.archives-ouvertes.fr/tel-01062645.
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The field of high-energy physics has been living a very exciting period of its history with the Large Hadron Collider (LHC) at CERN collecting data. Indeed, this enormous machine able to collide protons at a center of mass energy of 14 TeV promises to unveil the mystery around the physics at such energy scales. From the physicists side, the expectations are very strong as it isnowadays a certitude that the Standard Model of particle physics is incomplete and should, in fact, be interpreted as the effective theory of a more fundamental one. Unfortunately, the 7 and 8 TeV runs of the LHC did not provide any sign of new physics yet but there has been at least one major discovery in 2010, namely the discovery of a scalar particle with a mass of 125 GeV and whichproperties are very close to those of the Standard Model Higgs boson. Since then, many questions have come up as we now want to understand if it really is the Standard Model Higgs boson or if it exhibits any deviations. It is in this peculiar context that my research work was carried. In a first project, we, my supervisors, our collaborator and I, have wanted to explore thephenomenology associated with the neutralinos and charginos sector of the left-right symmetric supersymmetric model. Such an analysis can be motivated by several reasons such as the fact that the supersymmetric nature of these models provides a natural explanation for the infamous hierarchy problem, implies the unification of the gauge coupling constants at very high energy and provides a natural candidate for dark matter. In addition to these nice features, the left-right symmetry introduces a natural framework for explaining the smallness of neutrino masses but also helps in addressing several other unresolved issues in the Standard Model framework. Only focusing on the lightest charginos and neutralinos decaying into one or more light leptons, we have shown in our study that these models can be easily discovered in multi-leptonic final states as theylead to signatures very different from those induced by the Standard Model or its supersymmetric version.[...]
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Waldau, Susanne. "Creating organisational capacity for priority setting in health care : using a bottom-up approach to implement a top-down policy decision." Doctoral thesis, Umeå universitet, Epidemiologi och global hälsa, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-36316.
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In this thesis, priority setting to the form of the Swedish parliamental decision on priority setting, 1997, is considered an innovation for implementation in health care. The features of this innovation are investigated. The practical implications of implementation are identified by investigating the user organisation, ie, Swedish health care organisations and management systems. Also, a case of a three-stage process for macro-level priority setting that engaged the entire organisation in the Västerbotten County Council (VCC) is presented. This is done against a background of preceding implementation efforts in the VCC. Four specific research efforts and papers are presented. In Paper I, priority setting is operationalised into a multi-dimensional resource allocation task. On that basis, with the help of interviews (1998) and surveys (2002 and 2005) primarily of VCC health care managers, the impact of implementation is measured by prioritisation structures, processes and decisions. Survey response rates were low. Results were used as qualitative data, internally compared, and interpreted as: a) responses reflected mainly “early adopters’” opinions; b) priority setting is an ambiguous concept; c) indicating limited overall implementation; d) reinterpretation of the prioritisation task occurred over time among respondents; and, e) this group took increasingly personal responsibility as stakeholders in priority setting. Paper II reports a case study intervention of explicit, departmental level priority setting with the aim of improving cost-effectiveness in in vitro fertilization resource use and a rationing of services perceived legitimate by all stakeholders. The intervention combined priority setting and structured quality improvement techniques. Results were: a) improved operational efficiency of diagnostic procedures that allowed resources to be reallocated to treatment; and b) patients were prioritized and treatment resources were rationed based on evidence of treatment effect among subgroups. Evaluation showed that the procedure met stated criteria for legitimacy. In Paper III, a full-format test of the macro level prioritisation process is described and evaluated by participants with the help of surveys after each completed stage. Participants report the need for improvement of elements in the overall process and of procedural specifics. However, overall there was a strong commitment to the initiative and satisfaction with the process and the resulting decisions. In Paper IV, procedural specifics of the prioritisation process are evaluated. They are also compared to the Program Budgeting and Marginal Analysis (PBMA) framework when used for macro level purposes. Procedures provided intended results such as vertical and horizontal priority setting and a consistent process. However, economic targets were not fully achieved in any of the stages. Conclusions include that health care management systems are not prepared for priority setting and need profound restructuring and that the prioritisation process described in Papers III and IV was successful because: a) the process satisfied politicians’ directives; b) participants were satisfied with the procedures and perceived the subsequent reallocation decisions as legitimate; and, c) methods resulted in the intended outcome. Factors suggested as the basis of success include: long-term overall preparations; broad and deep participation; a readiness for change among participants; a stage for horizontal priority setting that added to the quality, feasibility and perceived validity of the knowledge base; a strong process leadership; and politicians determined to protect the process from opportunistic disturbances.
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Gangemi, Michael Andrew, and michael gangemi@rmit edu au. "Modeling The Economic Impact of A Farming Innovation Group On A Regional Economy - A Top-Down Versus Hybrid Input-Output Approach." RMIT University. Economics, Finance And Marketing, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080828.163749.
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This thesis involves construction of input-output models measuring the economic impact of a farming innovation organisation (The Birchip Cropping Group) on the Victorian regional economy of Buloke Shire. The input-output modeling undertaken is of two forms; the first being a simple naïve top-down model, and the second a more sophisticated hybrid model. The naïve top-down model is based on input-output coefficients drawn from the Australian national input-output tables, and is regarded as naïve because these input-output coefficients are not adjusted to take account of local economic factors. The hybrid model uses the same national input-output coefficients as a base, and then modifies these coefficients to better reflect industrial conditions in the Shire using a location quotients-adjustment technique, as well as using original survey data collected from entities operating in Buloke Shire. One of the aims of the thesis is to determine whether the simpler naïve top-down approach produces results consistent with the theoretically more accurate hybrid methodology, and thus whether the naïve top-down approach represents a reliable method of conducting regional economic impact analysis. That is, can such studies be undertaken accurately using a naïve top down approach, or is it necessary to adopt the more resource intensive methodology of a hybrid model. The results of the analysis suggest construction of a hybrid model is advisable, as generally the naïve top-down approach produces over-estimates of the economic effects of the Birchip Cropping Group. That is, it appears the economic impact multipliers estimated with the naïve top-down model are too large, suggesting the time and effort involved in constructing the hybrid model was worthwhile. Using the hybrid model, the conclusion is that the Birchip Cropping Group has a significant affect on the regional economy of Buloke Shire, with the economic impact being estimated at close to $600,000 in additional output, $61,000 in additional income, and 3.5 additional jobs per year.
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Szipka, Károly. "Prediction of the machine tool errors under quasi-static load : Developing methodology through the synthesis of bottom-up and top-down modeling approach." Thesis, KTH, Industriell produktion, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-186143.
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One of the biggest challenges in the manufacturing industry is to increase the understanding of the sources of the errors and their effects on machining systems accuracy. In this thesis a new robust empirical evaluation method is developed to predict the machine tool errors under quasi-static load including the effect of the variation of stiffness in the workspace, the geometric and the kinematic errors. These errors are described through combined computational models for a more accurate assessment of the machine tool’s capability. The purpose of this thesis is to establish such methodology through the synthesis of the bottom-up and the top-down modeling approach, which consists the combination of the direct (single axis measurements by laser interferometer) and indirect (multi-axis measurements by loaded double ball-bar) measurement technics. The bottom-up modeling method with the direct measurement was applied to predict the effects of the geometric and kinematic errors in the workspace of a machine tool. The top-down modeling method with the indirect measurement was employed to evaluate the variation of the static stiffness in the workspace of a machine tool. The thesis presents a case study demonstrating the applicability of the proposed approach. The evaluation technic extended for machine tools with various kinematic structures. The methodology was implemented on a three and a five axis machine tool and the results expose the potential of the approach.
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Banda, Davies. "Sport and the multisectoral approach to HIV/AIDS in Zambia." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/14988.
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Sport is increasingly being recognised for the contribution it can make to the Millennium Development Goals and, in particular, the response to the HIV/AIDS pandemic. This study is based on Zambia, a low-income country, heavily affected by the HIV/AIDS pandemic in sub-Saharan Africa. The study focuses on National Sports Associations (NSAs), which are quasi- autonomous organisations at meso level of policy analysis. Centring on three NSAs: Football Association of Zambia (FAZ), Zambia Basketball Association (ZBA) and Netball Association of Zambia (NAZ), this study critically analysed the organisational responses of each of the selected cases towards the HIV/AIDS multisectoral approach. The study adopted a case study approach which utilised semi-structured (face-to-face and telephone), interviews, focus group discussions and documentary analysis for data collection. Comparative analysis of all three cases revealed differences in how each case mainstreamed HIV/AIDS based on power, resources and forms of collaboration. Meso-level analysis was utilised to examine workplace HIV/AIDS policy formulation and implementation. In addition, meso-level analysis also helped reveal forms of health-related collaborations with both internal and external agencies. Macro-level theories of the state were useful in examining power relations between the Zambian state and civil society. The application of policy network theory, global health governance, multiple streams framework, and the top-down and bottom-up approaches to policy implementation proved useful in drawing attention to how each NSA case responded differently to the mainstreaming of HIV/AIDS. The political power of football as a national sport and the Association s access to foreign resources enabled FAZ to influence HIV/AIDS policy implementation and build of strong collaborative relationships with government than the ZBA and NAZ. The study concludes that lack of political steer from the top has re-introduced a new foreign top-down approach as those with resources from the Global North influenced policy formulation and implementation within all three cases. The conclusion also found useful the application of post-colonialism and development theories when examining international sport-for-development practices. This finding revealed the power imbalances between Global South practitioners and Global North funding partners.
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Dev, Choudhury Bikash. "Deterministic Silicon Pillar Assemblies and their Photonic Applications." Doctoral thesis, KTH, Halvledarmaterial, HMA, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-184709.
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It is of paramount importance to our society that the environment, life style, science and amusement flourish together in a balanced way. Some trends in this direction are the increased utilization of renewable energy, like solar photovoltaics; better health care products, for example advanced biosensors; high definition TV or high resolution cameras; and novel scientific tools for better understanding of scientific observations. Advancement of micro and nanotechnologies has directly and positively impacted our stance in these application domains; one example is that of vertical periodic or aperiodic nano or micro pillar assemblies which have attracted significant research and industrial interest in recent years. In particular, Si pillars are very attractive due to the versatility of silicon. There are many potential applications of Si nanopillar/nanowire assemblies ranging from light emission, solar cells, antireflection, sensing and nonlinear optical effects. Compared to bulk, Si pillars or their assemblies have several unique properties, such as high surface to volume ratios, light localization, efficient light guiding, better light absorption, selective band of light propagation etc. The focus of the thesis is on the fabrication of Si pillar assemblies and hierarchical ZnO nanowires on Si micro structures in top-down and bottom-up approaches and their optical properties and different applications. Here, we have investigated periodic and aperiodic Si nano and micro structure assemblies and their properties, such as light propagation, localization, and selective guiding and light-matter interaction. These properties are exploited in a few important optoelectronic/photonic applications, such as optical biosensors, broad-band anti-reflection, radial-junction solar cells, second harmonic generation and color filters. We achieved a low average reflectivity of ~ 2.5 % with the periodic Si micropyramid-ZnO NWs hierarchical arrays. Tenfold enhancement in Raman intensity is also observed in these structures compared to planar Si. These Si microstructure-ZnO NW hierarchical structures can enhance the performance and versatility of photovoltaic devices and optical sensors. A convenient top-down fabrication of radial junction nanopillar solar cell using spin-on doping and rapid thermal annealing process is presented. Broad band suppressed reflection, on average 5%, in 300- 850 nm wavelength range and an un-optimized cell efficiency of 6.2 % are achieved. Our method can lead to a simple and low cost process for high efficiency radial junction nanopillar solar cell fabrication. Silicon dioxide (SiO2) coated silicon nanopillar (NP) arrays are demonstrated for surface sensitive optical biosensing. Bovine serum albumin (BSA)/anti-BSA model system is used for biosensing trials by photo-spectrometry in reflection mode. Best sensitivity in terms of limit of detection of 5.2 ng/ml is determined for our nanopillar biosensor. These results are promising for surface sensitive biosensors and the technology allows integration in the CMOS platform. Si pillar arrays used for surface second harmonic generation (SHG) experiments are shown to have a strong dependence of the SHG intensity on the pillar geometry. The surface SHG can be suitable for nonlinear silicon photonics, surface/interface studies and optical sensing. Aperiodic Si nanopillar assemblies in PDMS matrix are demonstrated for efficient color filtering in transmission mode. These assemblies are designed using the ‘‘molecular dynamics-collision between hard sphere’’ algorithm. The designed structure is modeled in a 3D finite difference time domain (FDTD) simulation tool for optimization of color filtering properties. Transverse localization effect of light in our nanopillar color filter structures is investigated theoretically and the results are very promising to achieve image sensors with high pixel densities (~1 µm) and low crosstalk. The developed color filter is applicable as a stand-alone filter for visible color in its present form and can be adapted for displays, imaging, smart windows and aesthetic applications.QC 20160407
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Vargas, Anamaria, and Pietro Antonio Negro. "Driving organisational culture change for sustainability. Employee engagement as means to fully embed sustainability into organisations." Thesis, Malmö universitet, Fakulteten för kultur och samhälle (KS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-21729.
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When integrating sustainability, companies are often overlooking the changes needed in their organisational culture. This hinders organisations’ core business to efficiently embed sustainability and dooms corporate sustainability initiatives to be superficial. A possible solution is for organisations to develop a sustainability- oriented organisational culture that engages employees with the sustainability change and that develops a leadership supportive of the engagement of their employees. As a result, this thesis aims at exploring how organisations can change their organisational culture in order to fully integrate sustainability by engaging employees and managers. Specifically, it studies how employee engagement can contribute to transforming organizational cultures to fully embed sustainability. Additionally, this paper analyses how managers can support employee engagement with sustainability. The thesis conducts a literature review to set the theoretical foundations; it further resorts to semi-structured interviews and document analysis conducted in a Swedish public company, which has begun to integrate sustainability into its culture. The study finds that organisations’ cultures are being changed at the artifact levels and, partially, at the values and beliefs level of their cultures. Additionally, the thesis establishes that organisations are failing to create the conditions for employee engagement. It finally shows that leadership in companies is not efficiently supporting the engagement of employees to integrate sustainability into their culture.
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Terseleer, Lillo Nathan. "Bottom-up and top-down controls of diatoms in the Belgian coastal zone, Southern North Sea: combining plankton functional type modelling and trait-based approaches." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209321.
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Les diatomées sont une composante majeure des écosystèmes marins et sont caractérisées par une grande diversité. L’objectif général de cette thèse est d’étudier les facteurs de contrôle des diatomées dans la Zone Côtière Belge (ZCB). Pour ce faire, la modélisation par groupes fonctionnels et l’approche basée sur les traits sont combinées :la première fournit un cadre écosystémique utile pour étudier les interactions des diatomées avec les compartiments biotiques et abiotiques de l’écosystème, et la seconde permet de représenter de façon efficace leur diversité fonctionnelle.Dans un premier temps, puisque la taille est reconnue comme un trait majeur affectant de nombreux aspects de la valeur sélective du phytoplancton, la dépendance au biovolume de différents traits des diatomées a été établie sur base d’observations disponibles dans la littérature. Cette revue a montré qu’un compromis sépare les diatomées sur base de leur biovolume :les petites espèces sont meilleures compétitrices pour l’acquisition des ressources mais plus sensibles au broutage, et inversement.
Sur cette base, un ré-analyse d’un jeu de données incluant des comptages et mesures de biométrie avec l’identification de 68 taxons dans la ZCB entre 1992 et 2000 a été réalisée, avec une attention particulière pour la structure en termes de taille de la communauté de diatomées. Un regroupement des diatomées en fonction de leur biovolume a été réalisé sur base de leur évolution saisonnière typique. L’analyse de leur évolution temporelle suggère que la communauté des diatomées est composée d’assemblages avec une évolution saisonnière et interannuelle distinctes qui répondent vraisemblablement différemment aux conditions environnementales.
Afin d’étudier plus en profondeur les facteurs environnementaux contrôlant la structure en termes de taille de la communauté des diatomées dans la ZCB, le module diatomées du modèle MIRO, qui représente l’écosystème planctonique de la ZCP, a été modifié afin d’inclure les dépendances à la taille de quatre traits des diatomées. Cet outil reproduit correctement l’évolution saisonnière du biovolume moyen de la communauté, qui est caractérisé par de plus petites diatomées au printemps qui maximisent l’acquisition de ressources tandis que la prévalence du broutage en été induit une transition vers des espèces plus grandes. Le modèle a également été exploité pour étudier la gamme de tailles viables dans la ZCB en fonction des conditions environnementales.
Les résultats du modèle basés sur les traits ont ensuite été analysés sur la période 1992-2000. Les simulations ont mis en évidence les interactions complexes entre les processus physiques, de contrôles par les ressources et par le broutage, qui sont susceptibles de déterminer la variabilité interannuelle de la structure en termes de taille des diatomées dans la ZCB. La comparaison de ce modèle adaptatif avec un modèle plus conventionnel qui ne représente pas de diversité interne aux diatomées suggère que le premier produit une réponse légèrement plus flexible que le dernier, mais que la rigidité de la réponse simulée demeure un problème avec le modèle adaptatif qui reste incapable de représenter des évènements extrêmes de biomasse ou de structure de la communauté. Cela suggère que des développements supplémentaires du modèle sont nécessaires, en particulier du module zooplancton.
Finalement, une fonction écologique particulière est abordée dans une dernière section de cette thèse :la production d’une neurotoxine par certaines diatomées du genre Pseudo-nitzschia. Cette fonction a été incluse comme un métabolisme secondaire dans un modèle idéalisé de la croissance de Pseudo-nitzschia afin d’étudier les facteurs contrôlant la production de la toxine. Il est notamment montré que l’environnement lumineux est déterminant lorsque les conditions menant à la production de toxine sont rencontrées.
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Diatoms are a key component of marine ecosystems and are characterized by an important diversity. The general objective of this thesis is to investigate the bottom-up and top-down controls of diatoms in the Belgian Coastal Zone (BCZ). This is done through the integration of their functional diversity into a coherent framework. In order to achieve this, Plankton Functional Type modelling and trait-based approaches are combined: the former provides an ecosystem context convenient to study the interactions of diatoms with biotic and abiotic compartments, and the latter allows an efficient representation of their functional diversity.
As a first step, since size is recognized as a master trait shaping many aspects of phytoplankton fitness, the cell volume dependences of diatom functional traits were compiled from observations available in the literature. This review showed that a trade-off distinguishes diatoms on the basis of their cell volume: smaller species are better competitor for resource acquisition but sensitive to grazing, and inversely.
On this basis, a re-analysis of a dataset including diatom cell counts and biometry with the identification of 68 taxa in the BCZ over the 1992-2000 period was carried out, with a focus on the size structure of the diatom community. A clustering of diatoms according to their cell volume was realized on the basis of their average seasonality. Investigation of their time evolution suggested that the diatom community in the area is composed of assemblages with distinct seasonal and interannual evolution that likely respond differently to environmental conditions.
In order to further investigate the bottom-up and top-down constrains on the size structure of the diatom community in the BCZ, the diatom module of the MIRO model, which represents the planktonic ecosystem of the BCZ, was modified in order to accommodate size-dependences of four diatom functional traits. This tool adequately reproduced the seasonal evolution of the mean cell volume of the diatom community, which is characterized by smaller diatoms in spring that maximize resource acquisition while the prevalence of grazing pressures in summer induces a shift towards larger species. The model was also used to investigate the range of viable diatom sizes in response to the bottom-up and top-down pressures in the BCZ.
Results of the trait-based adaptive model were then analysed over the 1992-2000 period. Simulations evidenced the complex interactions between physical, bottom-up and top-down processes that are likely to govern the interannual variability in the size structure of diatom in the area. Comparison of the adaptive model with a more conventional model resolving no diversity within diatoms suggested that the former produces a slightly more flexible response than the latter, but showed that the rigidity of the simulated response persists with the adaptive model which remains unable to catch extreme biomass and community structure events. This calls for further developments of other compartments of the model, more particularly zooplankton.
Finally, a peculiar ecological function is addressed on its own in the last section of this thesis: the toxigenicity of some species of the genus Pseudo-nitzschia. This function was added as a secondary metabolism in an idealized model of Pseudo-nitzschia growth in order to investigate the factors affecting toxin production. It notably showed that light was determinant under conditions leading to its production.
Doctorat en Sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
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Velasco, Diana Carolina. "Innovation systems in developing countries : a top-down and bottom-up approach to studying the Colombian National System of Innovation and the coffee, flower and sugarcane production chains." Thesis, University of Edinburgh, 2015. http://hdl.handle.net/1842/15813.
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This thesis examines the evolution and development of science, technology and innovation (STI) policies in Colombia as a particular case study of a developing country within the Latin American and Caribbean (LAC) Region. The initial stage of the research analysed attempts by Colombian policy-makers from the 1960s onwards to build a National System of Innovation (NSI), following recommendations from transnational organisations such as the Organisation for Economic Co-Operation and Development and the Organisation of American States. This investigation found little evidence of systemic relationships between public, industrial and academic organisations to generate, exchange and apply knowledge. Central to these innovation strategies was a focus upon funding research with public resources to strengthen knowledge generation as the main mechanism for promoting innovation. This suggested that, although the STI policy was formally defined as following a ‘systemic’ approach, the policy mix reflected a linear reading of innovation (Tait & Williams, 1999) and generated an unhelpful (mis)perception of an uptake lag (Brown, Gregson, & Mason, 2015). The study was therefore refocused to develop a bottom-up understanding of innovation in selected industrial settings. A detailed analysis was undertaken of the innovation arrangements in three key Colombian agricultural industries - coffee, flower and sugarcane - within the national economy and global supply chains. This is an exploratory qualitative research based upon semi-structured interviews and specialised focus groups with key academic, public and private actors related with the evolution, design and application of innovation policies and strategies at the national and sectoral levels, supported by analysis of published and unpublished literature. Moving beyond narrow Innovation Systems (IS) perspectives, this thesis brought together aspects of STI policy design with an analysis of formal and informal social, economic and political institutions. A detailed focus on specificities of the three ISs under study highlighted important differences in terms of the generation and exploitation of knowledge linked to differences in inter-organisational relationships within the sub-sectors and their governance and governability. This in turn pointed tothe importance of cultural factors shaping innovation dynamics and the co-evolution of sectoral actors with technical, organisational and market changes. These findings suggest a top-down and bottom-up approach to understanding how national innovation strategy can be embedded in firms and industries. This thesis makes three contributions to knowledge. Firstly, it contributes to theories of sectoral innovation systems - showing that even at the sub-sectoral level, there are very different innovation pathways depending upon ownership, trading relations, scale, political insertion, longevity, sources and cumulativeness of knowledge. This reinforces the need for NSI to be grounded in broader historical and sociological understanding. Secondly, the operation of (de facto) innovation systems needs to be understood through a broad analysis of the embedded institutions and the power dynamics between the actors involved in the system. We suggest that the NSI approach might usefully be reconnected with earlier Latin American intellectual approaches that took into account the particularities of local/national industrial and knowledge institutions and the insertion of the LAC economies into global trading systems. Finally, it provides a critical appraisal of how the NSI approach can be read and understood by political actors to justify and shape particular policy mixes that encourage a narrow focus on the promotion and exploitation of public sector research based upon linear models of innovation.
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Hubrich, Hanna. "Active Matter in Confined Geometries - Biophysics of Artificial Minimal Cortices." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2020. http://hdl.handle.net/21.11130/00-1735-0000-0005-152A-5.
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Wolfsteller, Andreas [Verfasser], Hartmut S. [Akademischer Betreuer] Leipner, i. Morral Anna [Akademischer Betreuer] Fontcuberta, and Margit [Akademischer Betreuer] Zacharias. "Comparison of the top-down and bottom-up approach to fabricate axial nanowire-based Silicon, Germanium heterostructures / Andreas Wolfsteller. Betreuer: Hartmut S. Leipner ; Anna Fontcuberta i Morral ; Margit Zacharias." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2010. http://d-nb.info/1024976106/34.
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Vin, Pheakdey. "Institutions and Development : Analysis of the Effects of Institutional Environment on Agricultural Performance in Cambodia." Thesis, Lyon 2, 2012. http://www.theses.fr/2012LYO22004/document.
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L’objectif de cette thèse est de découvrir si l’environnement institutionnel affecte la performance agricole dans le cas du Cambodge et comment le premier influe sur la dernière. Pour répondre à cet objectif, trois hypothèses sont formulées : (1) l’environnement institutionnel joue un rôle important dans la protection des droits de propriété foncière ; (2) les droits de propriété foncière sécurisés augmentent la productivité agricole par la stimulation des incitations d’investissement des agriculteurs ; (3) les droits de propriété foncière sécurisés accroissent la productivité agricole par la facilitation de l’accès au crédit formel. Méthodologiquement, la recherche est basée sur les différentes théories de la Nouvelle Economie Institutionnelle, qui expliquent que les institutions déterminent la structure des incitations des acteurs économiques dans une société. Spécifiquement, les institutions politiques déterminent les institutions économiques, c’est-à-dire les droits de propriété, qui à leur tour affectent la performance économique en général et la performance agricole en particulier. La recherche est également basée sur les données venant de diverses sources, telles que des agences gouvernementales, des instituts de recherche locaux, des organisations non-gouvernementales et des organisations internationales, qui sont susceptibles de servir de base pour des analyses empiriques. En outre, le cas de l’Afrique subsaharienne est également étudié à titre de comparaison. Le résultat de la thèse confirme fortement les deux premières hypothèses, mais peu la dernière. Le résultat indique que l’impact de l’environnement institutionnel sur la productivité agricole via la protection des droits de propriété foncière est lié au contexte particulier parce qu’il devrait être complété par un environnement économique favorable, tel que l’infrastructure physique et la technologie agricole améliorées et les institutions du marché développées. De plus, on apprend que les résultats désirés ne sont pas obtenus si les institutions formelles (c’est-à-dire, l’enregistrement formel des terres) sont imposées via l’approche top-down dans les régions où les institutions informelles existantes sont fortement encastréesThe purpose of this dissertation is to find out if the institutional environment affects agricultural performance in the case of Cambodia and how the former exerts an influence on the latter. To respond to this purpose, three hypotheses are formulated: (1) the institutional environment plays an important role in protecting property rights in land; (2) secure property rights in land increase agricultural productivity through the stimulation of farmers’ investment incentives; (3) secure property rights in land raise agricultural productivity through the facilitation of access to formal credit. Methodologically, the research is based on different theories of New Institutional Economics, which explain that institutions determine the incentive structure of economic actors in society. Specifically, political institutions shape economic institutions, i.e. property rights, which in turn affect economic performance in general and agricultural performance in particular. The research is also based on the data from various sources, such as government agencies, local research institutes, non-governmental organizations, and international organizations, which can serve as a basis for empirical analyses. In addition, the case of Sub-Saharan Africa is also studied for comparison. The result of the dissertation confirms strongly the first two hypotheses but slightly the last one. The result indicates that the impact of institutional environment on agricultural productivity through the protection of property rights in land is context-specific because it should be complemented by a favorable economic environment, such as improved physical infrastructure and agricultural technology and developed market institutions. Furthermore, it is learned that, in developing countries, the desired outcomes will not be obtained if formal institutions (i.e., formal land registration) are imposed through a top-down approach in areas where the existing informal institutions are strongly embedded
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Motloung, Sysman. "Political culture and socialisation responses to integrated water resources management (IWRM) : the case of Thabo Mofutsanyane District Municipality / Sysman Motloung." Thesis, North-West University, 2010. http://hdl.handle.net/10394/10324.
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This study looks at political culture and socialisation responses to Integrated Water Resource Management (IWRM). It identifies political culture and socialisation as part of a process, the development of a political culture with specific attitudes, cognitions, and feelings towards the political system. Political culture and socialisation impart the knowledge of how to act politically, i.e. how to apply values in formulating demands and making claims on the political system. They form a connecting link between micro- and
macro-politics. The study maintains that political orientations are handed down from one generation to another, through the process of political socialisation. Top-down and bottom-up influences come into play to augment a discourse on the global nature of political socialisation and the political culture of international societies with regard to IWRM and governance ideologies. It is argued that these international ideas become relevant in the
national political agenda, civil society organisations and trans-national networks. The IWRM aspects of water as an economic good and a basic human right have become a two-edged sword in the South African context. The study reveals that politics stand at the epicentre of water problems, and that IWRM is a political-ethical issue which challenges power bases in many communities. The IWRM global norms of equitable, efficient and sustainable use of water resources have become a major problem in a water-scarce country burdened with economic inequalities and abject poverty. This is a pressing issue because there is an increasing demand for water to sustain the development necessary to redress the draconian ills of the apartheid past. This becomes evident in the fundamental legislative overhaul that has taken place since 1994, embracing a transformation culture that glorifies the norm of water not only as a fundamental human right, but also as a commodity that is necessary to sustain human dignity. It is here that water is politicised. Violent protests have erupted in reaction to perceived neo-liberal attempts to deny the poor their access to this resource. The political culture and socialisation responses as far as IWRM is concerned appear within fragmented lines, i.e. mainly black and poor communities embrace a culture of non-payment for services and resort to violent protests as a viable method to raise their
concerns. In contrast, the white and middle-class communities manifest a tendency to form parallel local government structures; they then withhold rate payments and provide services for themselves through ratepayer associations. Finally, the study considers the South African context with regard to the manifestations of political culture, and how this influences water resources. It is evident that there is too much emphasis on politics at the expense of
discussions on IWRM. Civil society organisations make very little attempt to encourage public participation in water management structures. It also appears that political elites who are disillusioned with civil society organisations tend to derail their efforts to educate the public on water management structures.MA, Political Studies, North-West University, Vaal Triangle Campus, 2011
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Hassan, Alexander. "Den internationella kontextens påverkan över en nations demokratiseringsprocess under transitionen från ett auktoritärt styre till ett demokratiskt - En analytisk kategorisering." Thesis, Örebro University, School of Humanities, Education and Social Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-7528.
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Abstract
Bachelor thesis in political science by Alexander Hassan, autumn 2008, “Effects of external factors on a nations democratisation process during the transition from authoritarian to electoral democratic rule – A categorical analysis”
Supervisor: Tomas Sedelius
In recent years globalization has become a hot topic in understanding the world we live in today. Globalization has indeed had a great impact on international relations and with it a great influence on the domestic conditions that determine a nation’s possibilities. It is therefore rational to hold true that this also would apply to a nation’s democratic process. This basic notion is what lies as a foundation for the thesis, where the purpose of the study is to examine the relatively new field of the international context and its significance on democratisation.
The aim of the study is to examine and determine, through a categorical analysis, the different forms and roles that the external factors can take during the process leading up to the transition and implementation of an electoral democracy, the most basic form of democracy.
The thesis thus has demanded the study and infusion of all discourses within the field of democratisation processes, as the only way to produce the roles and forms of the international contexts impact on the domestic process is through the study and determination of the different domestic spheres associated with the process.
The different forms of external influences have been studied within the confines of the third wave of democracy, and their roles in the democratic process determined depending on the respective domestic spheres they affect. The significant result of the studies where chiefly that all forms of external influence have the possibility to affect the democratisation process indirectly as well as directly. Where direct influence is exerted within the political sphere of the nation; where the actual transition takes place, and the indirect influence is exerted through the socio-economical and cultural sphere; which exerts its influence in the process through the political sphere.
The results thus show that it is hard to draw the conclusion that an indirect form of influence would be superior to the direct approach or vice versa, as both are prevalent in successful democratic transitions.
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Wirth, Janine [Verfasser], Cornelia [Akademischer Betreuer] Weikert, Heiner [Akademischer Betreuer] Boeing, and Reinhard [Akademischer Betreuer] Busse. "The mediterranean diet and its components and the risk of heart failure in the European Prospective Investigation into Cancer and Nutrition (EPIC)-Potsdam study : a top down approach / Janine Wirth. Gutachter: Heiner Boeing ; Reinhard Busse ; Cornelia Weikert. Betreuer: Cornelia Weikert." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1070580651/34.
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Burke, Madeline Jane. "Top-down and bottom-up approaches to tissue engineering." Thesis, University of Bristol, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720837.
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Vaurette, François. "Fabrication top-down, caractérisation et applications de nanofils silicium." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10009/document.
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Cette thèse porte sur l'étude de nanofils silicium réalisés par approche top-down. Elle s'inscrit dans le contexte de la miniaturisation des composants et la compréhension du transport dans les systèmes 1D. Deux voies de fabrication sont envisagées: la lithographie par AFM (Microscope à Force Atomique) et la lithographie électronique. Cette dernière étant plus reproductible, les dispositifs finaux sont fabriqués par cette technique, à partir d'un substrat SOI et plusieurs étapes de gravure et métallisation. L'étude des nanofils par mesures l(V) nous permet de mettre en évidence une zone déplétée à l'interface Si/SiO2 natif. Grâce à l'utilisation de nanofils de largeurs et de longueurs différentes, nous sommes capables de déterminer la largeur de la zone déplétée, la densité d'états d'interface ainsi que le niveau de dopage des nanofils. L'évolution de la résistance des nanofils avec la température est également étudiée et montre une dépendance associée à la diffusion des phonons de surface. Trois applications sont ensuite décrites : un décodeur, un commutateur de courant et un capteur biologique. En effet, la gravure locale des nanofils conduit à une modulation de la bande de conduction, rendant possible la réalisation d'un décodeur. D'autre part, la fabrication de croix à base de nanofils et de grilles latérales à proximité des croix qui contrôlent le passage du courant dans les différentes branches permet de former un commutateur de courant. Enfin, grâce au rapport important de la surface par rapport au volume des nanofils et leur bonne fonctionnalisation chimiques, ceux-ci sont utilisés pour détecter électriquement des interactions biologiques (détection de l'ovalbumine)This work focuses on the study of silicon nanowires made by a top-down approach. The context of the study is the miniaturisation of the components and the understanding of the transport in 1D systems. Two fabrication approaches are studied : AFM lithography (Atomic Force Microscope) and e-beam lithography. The latter being more reproducible, the final devices are fabricated by this technique using a SOI substrate and multiple steps of etching and metallization.Transport characterization of the Si nanowires allows us to highlight a depleted area at the interface Si/native SiO2. Using nanowires with different widths and lengths, we can determine the depletion width, the surface state density as well as the doping level of the nanowires. The evolution of the nanowires resistance with temperature is also investigated, showing a dependence associated with surface phonons scattering. In the last chapter, three applications are described : a decoder, a current switch and a biosensor. The use of a local etching allows the modulation of the conduction band of the nanowires, opening the way to build a decoder using two local gates. Crossbar structures, where lateral gates which can derive the current in the di_erent branches, lead to the fabrication of a current switch. Finally, thanks to the large surface to volume ratio in these structures, the nanowires are used to detect electrically the interactions between molecules (ovalbumine detection)
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Giorgis, Valentina. "Design, fabrication and characterization of metamaterial inspired structures for sensing application." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8576.
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2011/2012In the last few years the interest in nanostructures for sensing application has grown increasingly, leading to the development of new designs based on the surface plasmon resonance of metallic structures. By carefully tuning the geometry of the nanostructures, it is possible to adjust the resonance frequencies, resulting in amplification and confinement of the electromagnetic field around specific areas of the structure. The oscillating plasmonic field obtained may be exploited for bio-chemical detection. In this work we present the design, the fabrication and the characterization of gold nano split ring resonators on transparent substrate, combining finite element simulation, lithographic techniques and transmittance ellipsometry. Bearing in mind the importance of the control of the geometric parameters, we approach the structure fabrication using top-down lithographic techniques. We explore and develop, in particular, an X-ray Lithography based process for producing high volumes of tall, nanometric split ring resonators. The choice of X-ray Lithography as the main technique is justified by the possibility to obtain higher aspect ratio and to achieve large areas array of split ring resonators in a single, fast exposure, compared to other techniques, such as nanoimprinting or Electron Beam Lithography. The structure we focused our research on is the split ring resonator, one of the most popular and studied geometries for metamaterials. As metamaterial building block, the split ring resonator exhibits characteristic plasmonic resonances and a tunable frequency magnetic resonance. Besides, the split ring resonator shows a strong polarization dependance and a strong mechanical stability. In this thesis we will analyze the optical properties of the split ring nanostructure when illuminated in normal incidence. The analysis of the response in transmission at two polarization is presented. The preliminary detection test performed using a monolayer of dodecanthiol evidence the detection potential of this geometry.
XXV Ciclo
1984
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Andersson, Julia, and Elin Lagerström. "Listen Up! : A study of how teachers in SLA approach the listening skill within upper secondary schools in Sweden." Thesis, Högskolan i Halmstad, Akademin för lärande, humaniora och samhälle, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-41983.
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Listening comprehension and listening strategies plays a crucial role in the process of acquiring a language. This study aims to investigate to what extent the listening skill is practised in upper secondary schools in the south of Sweden. Research studies within the field of listening are few which indicates that the listening skill is not considered as essential in second language teaching as the other three skills: reading, writing and speaking. Previous studies indicate that teachers should educate students metacognitive awareness when teaching listening. The results summarize the teachers’ answers, reflections and attitudes conducted from semi-structured interviews. The analysis of the results focuses on the four categories distinguished from the teachers’ answers: Teaching Approaches, National Exams, The Individual Student and Metacognitive Awareness. Some of the teachers do not possess the knowledge of how to teach listening that develops students' listening proficiency. As a conclusion, the study shows that a hierarchy exists among the four skills to which teachers adjust to, and this may be detrimental in achieving educational aims.
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Nakad, Fabricio Abdo, and Gabriel Junqueira Pamplona Skaf. "Desafios para a implementação da Base Nacional Comum Curricular." reponame:Repositório Institucional do FGV, 2017. http://hdl.handle.net/10438/19945.
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O presente trabalho foi realizado com o intuito de responder a pergunta “como fazer a Base Nacional Comum Curricular (BNCC) chegar nas salas de aula?”, tendo em vista os principais desafios relacionados ao processo de implementação do documento da Base, decorrentes, em grande parte, do fato de o Brasil ser um país de realidades socioeconômicas e costumes bastante díspares, além de o sistema de educação básica nacional ser constituído de uma rede extensa, distribuída por um território vasto e diverso. Foram levantados os principais modelos teóricos de implementação de políticas públicas, o contexto do tema no Brasil e o resultado prático em outros países que já adotaram uma base curricular comum. Buscou-se, em remate, propor soluções para viabilizar o processo de implementação da BNCC.
The present work was carried out with the purpose of answering the question “how to make the ‘Base Nacional Comum Curricular (BNCC)’ reach the classrooms?”, considering the main challenges related to the implementation process of the Base’s document, due, in large part, the fact that Brazil is a country with very different socioeconomic realities and mores, and the national basic education system consists of an extensive network, spread over a vast and diverse territory. Were analyzed the main theoretical models for the implementation of public policies, the context of the theme in Brazil and the practical result in other countries that have already adopted a common curricular basis. It was sought, in closing, to propose solutions to make viable the process of implementation of the BNCC.
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Abdussalam, S. S. "Bottom-up and top-down approaches to low energy supersymmetry breaking." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.595324.
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In this thesis we address the phenomenology of SUSY breaking from the superstring scale to the electroweak scale in order to produce a guide map for discovery at the LHC. From the top-down approach we study SUSY breaking at low-energies from a well defined superstring theory scenario and extract its phenomenological implications. From the bottom-up approach (independent of string theory), using Bayesian inference techniques, we make the first complete model-independent scan of the low energy phenomenological MSSM (pMSSM) parameter space. We perform the first statistically convergent pMSSM global fit to all current collider and DM data. We demonstrate the application of Bayesian model selection methodology to high energy SUSY breaking models with modest number of free parameters. We found that SUSY breaking from superstring theory should eventually help test its reality and that direct data is required in order to assign unambiguous preferences between different high energy SUSY breaking models. We predict that the Higgs boson mass lies between 117 GeV and 128 GeV at 95% confidence level. We believe this is a robust prediction that should be confirmed once SUSY is discovered at the LHC. Our pMSSM parameters fit provides an appropriate arena for the LHC studies of the MSSM which we wish to pursue further in future work.
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Darroman, Mélanie. "Renaissance de l'habitat participatif en France : vers de nouvelles formes négociées de fabrication de la ville ? Deux études de cas dans l'agglomération bordelaise : le projet HNord (Bordeaux) et La Ruche (Bègles)." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0485.
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Cette thèse interroge les effets combinés des enjeux d’un urbanisme durable et d’un impératif participatif grandissant des habitants – usagers – citoyens, dans le cadre de la fabrication métropolitaine contemporaine. Depuis le début des années 2000, des expériences alternatives d’habitat émergent en France sous l’impulsion de revendications sociales portées par la société civile. Le terme générique d’« habitat participatif », définit récemment par la loi pour l’Accès au Logement et à un Urbanisme Négocié (ALUR), publiée au Journal Officiel le 26 mars 2014, rassemble ainsi d’une même voix la variété de ces initiatives à l’œuvre, contribuant à pérenniser les dynamiques de structuration et de diffusion d’un mouvement de l’habitat participatif. Faisant référence aux expressions citoyennes contestataires des années 1970-1980, avec la critique d’un urbanisme moderne et des politiques publiques, les projets actuels marquent la renaissance des questionnements autour de la place de la maîtrise d’usage – incarnée par les habitants-usagers – dans la chaîne de production des logements et, plus largement, dans les processus décisionnels d’aménagement des territoires. Porteuse de pratiques participatives innovantes, la résurgence de l’habitat participatif révèle des logiques diverses d’engagements citoyens, militants ou professionnels, et des formes négociées de fabrication de l’habitat. Dès lors, s’opposent des dynamiques « bottom-up » – illustrées par des demandes et des initiatives habitantes, et des dynamiques « top-down » – portées par des instances politico-institutionnelles en plein renouvellement de leurs modes d’action et savoir-faire. Supportée par une trame multidimensionnelle de négociations, la thèse propose alors une analyse des interactions et des formes d’hybridation de cette production collective en cours à travers trois dimensions : la dimension valorielle, pour fixer le socle des transactions sociales ; la dimension organisationnelle et relationnelle, pour observer la micropolitique des groupes-projets ; la dimension processuelle, pour saisir les temporalités du projet et les moments clés de la négociation sur l’ensemble du processus. Pour cela, nous nous appuyons sur deux cas d’étude dans l’agglomération bordelaise, en pleine métropolisation : le cas de la coopérative d’habitants HNord, sur l’îlot Dupaty à Bordeaux ; et celui d’un projet d’habitat participatif multi-partenarial, La Ruche, sur la commune de Bègles au sein de l’Opération d’Intérêt National (OIN) Bordeaux-Euratlantique. Encadrée par un dispositif CIFRE avec l’Etablissement Public d’Aménagement Bordeaux-Euratlantique (EPA), la recherche repose sur une approche ethnographique, basée sur de nombreuses situations d’observation participante, des entretiens d’acteurs cibles et une analyse documentaire. Les enquêtes menées à différentes échelles offrent une vision macro, méso et microsociale des processus de production et de diffusion de l’habitat participatif. Les résultats de la thèse mettent alors en évidence les modalités de partenariats entre différentes sphères d’acteurs – les habitants, les institutions et les experts – dans la production de l’habitat participatif conduisant à un changement de paradigme sociétal et professionnel à travers le renouvellement des modes d’habiter, des savoirs et savoir-faire. Ainsi, nous proposons une réflexion sur les moyens et possibilités d’intégration de cette dynamique collective et citoyenne au sein des processus décisionnels d’aménagement urbain pour la fabrication métropolitaine et, de voir en quoi ce phénomène participatif et collaboratif peut-il constituer un outil de management territorial novateur préfigurant le futur de nos citésThis PhD thesis questions the combined effects of the challenges of sustainable urban development and a growing priority for inhabitants – users – citizens, to participate in contemporary metropolitan production. Since the early 2000s, there is in France an emergence of alternative housing experiences as a result of social demands. The generic term of « participative housing », recently defined by the bill for access to housing and urban renovation (ALUR), published in the Official Journal on March 26, 2014, gathers with one voice, the variety of these initiatives at work, contributing to ensure the dynamic structuring and dissemination of the participative housing movement. Referring to the civil protests of 1970-1980, criticizing modern urban planning and public policy, the current projects tackle once again of how to combine the inhabitants expertise with professional expertise in the production of housing, and more broadly in the decision-making processes of regional planning. Producing innovative participatory practices, the resurgence of participative housing reveals different logics of social commitments on the part of citizens, activists and professionals, and negotiated forms of housing production. As a consequence, the « bottom-up » dynamic, based on the demands and initiatives of the inhabitants, opposes the « top-down » dynamic, based on the initiative of politico-institutional bodies in full renewal of their modes of action and know-how. Supported by a multi-dimensional framework of negotiations, the thesis analyzes the interactions and forms of hybridization of this ongoing collective production through a three dimensional approach : the value related dimension, to set the base of social transactions ; the organizational and relational dimension to observe the micro-political groups-projects ; the procedural dimension to grasp the temporality of the project and the key moments of negotiation of the whole process. For this, we build on two case studies in the Bordeaux area, being subject to processes of metropolization : the case of the residents cooperative HNord in the Dupaty housing block in Bordeaux ; and the multi-partnered participative housing project, La Ruche, in the town of Bègles within the framework of the « Operation of National Interest » (OIN) Bordeaux-Euratlantique. Governed by a CIFRE program with the « Local Planning and Development authority » (EPA) Bordeaux-Euratlantique, the research is based on an ethnographic approach : participant observation, interviews with target stakeholders and a literature review. The investigations conducted at different scales offer a macro, meso and micro-social understanding of the process of participative housing production and dissemination. The results of the thesis highlight the partnership conditions between different groups of stakeholders – inhabitants, institutions and expertsn – in the production of participative housing leading to a societal and professional paradigm shift through a renewal of ways of living, knowledge and expertise. Thus, we propose a reflection on ways and possibilities how to integrate this collective and civic dynamics in the decision-making processes of urban planning for metropolitan production and to see how this participatory and collaborative phenomenon can serve as an innovative tool in territorial management for our future cities
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Lehoucq, Gaëlle. "Transistors à nanofils de silicium top-down. Application à la détection biologique." Phd thesis, Ecole Polytechnique X, 2010. http://tel.archives-ouvertes.fr/tel-00488323.
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Ce travail de thèse a porté sur la réalisation d'un capteur d'espèces biologiques en solution à partir de réseaux organisés de nanofils de silicium opérant sur le mode d'un transistor à effet de champ à "grille biologique". Cette nouvelle génération de biocapteurs vise à être intégrée dans des systèmes de détection ultrasensibles et compacts destinés à des applications médicales et militaires. Nous proposons la réalisation des transistors à nanofils de silicium suivant une approche dite "top-down". Cette méthode, qui consiste à graver les nanofils dans une couche mince de silicium, permet un contrôle précis de leur positionnement, contrairement à l'approche "bottom-up", qui utilise des nanofils obtenus par croissance CVD. Ceci permet l'obtention de transistors aux caractéristiques électriques reproductibles et facilite leur intégration. La première partie de nos travaux a ainsi concerné le design et la fabrication de transistors à nanofils de silicium suivant une approche top-down. Ce travail de développement technologique a permis la réalisation de composants que nous avons caractérisés à sec puis adaptés à un fonctionnement en milieu liquide. La seconde partie de nos travaux a porté sur la réalisation de mesures en solution. La validation du fonctionnement de notre transistor en mode capteur a été démontrée par le suivi de variations de pH. Notre étude a ensuite eu pour objet la mise en valeur de l'ensemble des paramètres influençant les performances du capteur (choix de la tension de grille, de la force ionique, influence de la microfluidique, ...), la compréhension de ces facteurs étant indispensable à la réalisation de mesures biologiques fiables.
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Wäckerle, Manuel. "On the Bottom-up Foundations of the Banking-Macro Nexus." Kiel Institute for the World Economy, 2013. http://dx.doi.org/10.5018/economics-ejournal.ja.2013-40.
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The complexity of credit-money is conceived as the central issue in the banking-macro nexus, which the author considers as a structural as well as process component of the evolving economy. This nexus is significant for the stability as well as the fragility of the economic system, because it connects the monetary with the real domain of economic production and consumption. The evolution of credit rules shapes economic networks between households, firms, banks, governments and central banks in space and time. The properties and characteristics of this evolutionary process are discussed in three sections. First, the author looks into the origins of the theory of money and its role for contemporary monetary economics. Second, he briefly discusses current theoretical foundations of top-down as well as bottom-up approaches to the banking-macro nexus, such as dynamic stochastic general equilibrium and agent-based models. In the third part he suggests an evolutionary framework, building on a generic rule-based approach, to arrive at standards for bottom-up foundations in agent-based macroeconomic models with a banking sector. (author's abstract)