Rozprawy doktorskie: „DEWATS”

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Reynaud, Nicolas. "Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions". Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-185565.

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Decentralised Wastewater Treatment Systems (DEWATS) such as disseminated by the Bremen Overseas Research and Development Association (BORDA) are increasingly being recognized by decision makers across the world as an option for service delivery in densely populated low-income areas. However, little practical experience has been gathered methodologically on basic engineering and performance aspects surrounding these systems. This thesis investigates full-scale anaerobic reactors of communal DEWATS implemented in tropical regions in order to consolidate the basis of future design and support monitoring, operation and maintenance procedures. Special focus is laid on the operation of the Anaerobic Baffled Reactor (ABR) as the core technology of DEWATS. Field research has been conducted for over four years at numerous communal systems in Indonesia, India and South Africa in order to (i) verify the generally used parameter values for DEWATS design and operation, (ii) identify factors limiting the treatment efficiency of existing systems in the field and (iii) investigate the performance of DEWATS and DEWATS treatment steps (especially ABRs) under tropical field conditions in terms of effluent concentration, Chemical Oxygen Demand (COD) removal, sludge stabilisation and sludge activity. Field data on average per capita wastewater production in DEWATS implementation areas, long term fluctuations and peak-flow values are presented. General per capita organic load and per capita nutrient load, per capita biogas production in digesters and per capita sludge accumulation in ABRs are estimated. Based on available data and field observations, treatment limiting factors are hypothesised to be rain-water intrusion, general under-loading, organic under-loading and elevated raw-water salinity in coastal areas. Effluent measurements performed at one hundred nine systems in Indonesia indicated guaranteed maximum concentrations of 200 mg CODt l-1 for anaerobic DEWATS treatment effluent if the treated wastewater is non-saline. ABR COD reduction of four case studies was poor in three cases and fair in one case. Sludge accumulation rates indicated good sludge stabilisation and sludge activity in all four systems. Anaerobic Filters (AF) contributed in all three case studies, in which they were part of the plant design, significantly to COD reduction. Nutrient effluent concentrations were comparably high. Large fractions of effluent organics were found to be biodegradable. It is hypothesised that system treatment would improve significantly if maximum hydraulic load was lower, general organic load was higher and therefore both close to design estimation. It is thus proposed to control the amount of storm water intruding the systems, increase feed concentration through partial grey-water exclusion and reduce the nutrient load in system effluent through partial urine diversion. It is further proposed to reduce the HRT of the settler below 10 h in order to increase the organic load to the ABR. It is further hypothesised that systems could be operated at higher hydraulic dry weather load than currently assumed since active anaerobic digestion appears to be capable of establishing itself under extreme hydraulic pressure. This may lead to a considerable reduction of building costs. Anaerobic digestion modelling with the existing ADM-3P model confirmed that observed sludge accumulation rates indicate active hydrolytic systems. The model could however not be used to produce soluble COD effluent concentration benchmarks due to its sensitivity to methanogenic rate constants. The general view held for anaerobic reactors treating wastewater with high solid content is that hydrolysis is the rate-limiting degradation step. It is hypothesised that this does not apply for solid accumulating systems such as the ABR
Die durch die Bremen Overseas Research and Development Association (BORDA) verbreiteten Decentralised Wastewater Treatment Systems (DEWATS) werden international von Entscheidungsträgern zunehmend als Möglichkeit angesehen, kommunale Abwasserreinigung in dichtbesiedelten, einkommensschwachen Gegenden zu ermöglichen. Allerdings wurden bislang wenig praktische Erfahrungen methodisch über grundlegende Aspekte der Anlagendimensionierung und Anlagenleistungsfähigkeit aufgenommen. Im Rahmen dieser Dissertation wurden anaerobe Reaktoren kommunaler DEWATS unter tropischen Feldbedingungen untersucht, um eine Datengrundlage für zukünftige Dimensionierung, Wartung und Betrieb, als auch Monitoring der Anlagen zu schaffen. Schwerpunkt wurde dabei auf den Anaerobic Baffled Reactor (ABR) als Kerntechnologie von DEWATS gelegt. Felduntersuchungen wurden in der Zeit von mehr als vier Jahren an zahlreichen kommunalen DEWATS in Indonesien, Indien und Südafrika durchgeführt, um (i) die gängig gewählten Parameterwerte für Anlagen-Dimensionierung und -Betrieb zu überprüfen, (ii) leistungslimitierende Faktoren im Feldbetrieb zu identifizieren und um (iii) die Leistungsfähigkeit von DEWATS und DEWATS-Reinigungsstufen (insbesondere des ABRs) unter tropischen Feldbedingungen bezüglich Abflusskonzentrationen, Reduzierung des Chemischen Sauerstoffbedarfs (CSB), Schlammstabilisierung und Schlammaktivität zu untersuchen. Basierend auf den Untersuchungsergebnissen, wurden durchschnittliche Einwohnergleichwerte, Langzeitvariationen und Faktoren für Zuflussspitzen für kommunale Abwasserproduktion in DEWATS-Zielbevölkerungsgruppen präsentiert. Ferner werden allgemeine Pro-Kopf-CSB-Frachten, -Ammoniumfrachten und -Phosphorfrachten, die Pro-Kopf-Biogasproduktion in kommunalen Biogasanlagen sowie die Pro-Kopf-Schlammakkumulation in ABRs abgeschätzt. Auf Felduntersuchungen basierend, wurden Fremdwassereinfluss, generelle Unterbelastung, organische Unterbelastung und erhöhte Frischwassersalinität in Küstengebieten als leistungslimitierende Faktoren im Feldbetrieb identifiziert. An 109 indonesischen Anlagen durchgeführte Abflusskonzentrationsmessungen ließen auf eine garantierte Abflusskonzentration der anaeroben Reaktoren von 200 mg CSB l-1 schließen, wenn der negative Einfluss von erhöhter Frischwassersalinität ausgeschlossen werden kann. Der CSB-Abbau durch ABRs in vier detailliert untersuchten DEWATS war gering in drei Fällen und befriedigend in einem Fall. Anaerobe Filter (AF) trugen in den drei Fällen, in denen sie Teil der Anlagenkonfigurationen waren, signifikant zur CSB-Reduzierung bei. Ammonium- und Phoshorkonzentrationen in allen Reaktorabläufen waren vergleichsweise hoch. Ein großer Anteil des CSBs in Reaktorabläufen war biologisch abbaubar. Es wird die Hypothese aufgestellt, dass sich die Leistungsfähigkeiten der Anlagen signifikant verbessern würden, wären die Anlagenbelastungen den Auslegungswerten ähnlicher, d.h., wären die maximalen hydraulischen Belastungen geringer und die organischen Belastungen höher. Es wird deshalb geraten, den Fremdwasserzufluss zu minimieren, die Anlagenzulaufkonzentration durch partielle Grauwasserversickerung zu erhöhen und die Ammonium- und Phoshorkonzentration im Zulauf durch partiellen Urinabschlag zu verringern. Es wird außerdem vorgeschlagen, die hydraulische Aufenthaltszeit in Absetzbecken (settlers) auf zehn Stunden zu begrenzen, um so die organische Belastung der ABRs zu erhöhen. Ferner wird die Hypothese aufgestellt, dass Anlagen unter höherer Trockenwetterbelastung als bislang angenommen betrieben werden können, da aktiver anaerober Abbau auch unter extremen hydraulischen Belastungen möglich erscheint. Dies könnte zu einer signifikanten Senkung der Baukosten führen. Die Modellierung anaerober Abbauprozesse mit dem existierenden ADM-3P-Modell bestätigten, dass im Feld beobachtete Schlammakkumulationsraten auf eine aktive Hydrolyse schließen lassen. Das Modell konnte jedoch nicht genutzt werden, um Bezugswerte für den gelösten CSB im Ablauf der Anlagen zu erhalten, da es eine vergleichsweise hohe Sensitivität in Bezug auf die Raten für Methanogenese aufwies. Die allgemein anerkannte Sichtweise ist, dass die Hydrolyse den geschwindigkeitsbestimmenden Abbauschritt bei der anaeroben Behandlung feststoffreicher Abwässer darstellt. Es wird die Hypothese aufgestellt, dass dieses nicht für feststoffakkumulierende Systeme, wie den ABR, zutrifft

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Reynaud, Nicolas [Verfasser], Peter [Akademischer Betreuer] Krebs, Christopher [Akademischer Betreuer] Buckley i Roland [Akademischer Betreuer] Müller. "Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions / Nicolas Reynaud. Betreuer: Peter Krebs ; Christopher Buckley. Gutachter: Roland Müller ; Peter Krebs ; Christopher Buckley". Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://d-nb.info/1078839905/34.

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Reynaud, Nicolas Simeon [Verfasser], Peter [Akademischer Betreuer] Krebs, Christopher [Akademischer Betreuer] Buckley i Roland [Akademischer Betreuer] Müller. "Operation of Decentralised Wastewater Treatment Systems (DEWATS) under tropical field conditions / Nicolas Reynaud. Betreuer: Peter Krebs ; Christopher Buckley. Gutachter: Roland Müller ; Peter Krebs ; Christopher Buckley". Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-185565.

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Jensen, Max Joakim Mouritzen. "John Deweys filosofi : En tolkning av John Deweys pedagogiska filosofi". Thesis, Södertörn University College, Lärarutbildningen, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-730.

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John Dewey föddes år 1859, samma år som Charles Darwin bröt ny mark för människan genom sin Theory of Species. Genom Darwin skulle grunden för det kollektiva mänskliga tänkandet och förståelsen av oss själva aldrig förbli detsamma. För Dewey precis som för Darwin är det förståelsen av människan och hennes värld som är det intressanta.

Denna uppsats är en närläsning av Deweys verk Demokrati och utbildning som publicerades för första gången 1916. Verket som är skrivet på tidigt 1900-tal har haft ett stort inflytande på pedagogiskt tänkande generellt, men är också ett av de verkligt intressanta arbetena rörande människan och utbildningens roll för det demokratiska samhället. Verket är av idémässigt fundamental betydelse för den filosofiska tanketradition som kallas pragmatism då Dewey fångar upp den bärande idén om människan i samhället som en del av världen och som beroende av en bra utbildning.

Uppsatsen har för avsikt att förmedla och tolka de tankegångar som Dewey låter framträda i Demokrati och utbildning. Arbetet har resulterat i de sex tematiska delarna som är ordnade under rubrikerna; Utbildningens demokratifunktion, Individens kunskap om världen, Att tänka, Kunskapsteori, Moral samt Deweys filosofibegrepp. Olika teorier om sanning presenteras och pragmatismens sanningsteori behandlas. Avslutningsvis konstateras att det som vi idag ser som filosofi en gång startade genom utbildning och att den pragmatiska filosofin i första hand påverkar samhället genom utbildningen.

John Dewey was born in 1859. That same year Charles Darwin published his Theory of Species. After Darwin, the understanding of human and human thinking of itself never again would be the same. For Charles Darwin and John Dewey the understanding of human and humans role in the world is the most interesting and important part of knowledge.

This essay is a reading of Deweys Demokracy and Education witch first was published in in the year of 1916. The main part of this work is in the six parts; The education and its democracy principle, The individualls knowledge of the world, to think, theory of knowledge, moral and Dewey´s philosophy.

The essay will also explain that the work of Dewey (Democracy and Education) has a huge impact on philosophy in the arena of education. It is also very important for the American philosophy called Pragmatism formed and grunded by Dewey, William James and Charles Sanders Peirce.

The work was written in the early 20th century and catch the idea of human need and hunger for education and also the importance of good education for the society in witch humans as individualls in groups are living. A number of theories of truth is represented and the philosophy called Pragmatism is represented as having it´s own theory of truth.

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FRANCA, LIVIA FERNANDES. "DEMOCRACY IN JOHN DEWEYS PRAGMATISM". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2007. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=15446@1.

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O objetivo deste trabalho é estudar a democracia no pensamento do pragmatista estadunidense John Dewey (1859-1952) e sua contribuição para a teoria política contemporânea. Num primeiro momento, se examina o pensamento político do autor, ressaltando-se as implicações que o antifundacionismo e o contextualismo sugerem. Já o confronto do pensamento de Dewey com críticas de Richard Rorty, Richard Bernstein, Robert Westbrook e Alfonso Damico sugere que, ao mesmo tempo em que o vocabulário do estadunidense é refém de imperativos de sua época, deixa grande contribuição para a teoria contemporânea; a de que a democracia é o modelo político que permite a geração de novas formas de vida e sua permanentemente recriação, a partir do contínuo confronto com a prática, de forma a mapear trajetórias para que desejos e aspirações da sociedade sejam concretizados.
This dissertation aims to study the thought of the American pragmatist John Dewey (1859-1952) on democracy and its contribution to the contemporary political theory. At first, the political thought of the author is analyzed, and the anti-foundationalism’s and contextualism’s repercussions are highlighted. The tension between Dewey’s thoughts and the ideas of Richard Rorty, Richard Bernstein, Robert Westbrook and Alfonso Damico suggest that, if in the one hand Dewey’s vocabulary is a victim of his own time, it brings a great contribution to contemporary theory. This contribution is expressed though the idea that democracy is the political model that allows the creation of forms of life and their permanent recreation, from the clash between theory and practice, aiming at the designing of trajectories that will give life to the desires and aspirations of society.

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Dewald, Wilma [Verfasser]. "Lichtmanagement in Silizium-Dünnschichtsolarzellen / Wilma Dewald". Gießen : Universitätsbibliothek, 2013. http://d-nb.info/1065184360/34.

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Peres, Clovis Belbute [UNESP]. "Radiação e detetores de Unruh - DeWitt". Universidade Estadual Paulista (UNESP), 1993. http://hdl.handle.net/11449/132662.

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Made available in DSpace on 2016-01-13T13:27:32Z (GMT). No. of bitstreams: 0 Previous issue date: 1993-09-28. Added 1 bitstream(s) on 2016-01-13T13:33:01Z : No. of bitstreams: 1 000854600.pdf: 1022046 bytes, checksum: 14be557a18bce93d838ba01c104f9da9 (MD5)
Estudamos o conceito de radiação em dois contextos aparentemente distintos: radiação proveniente de uma carga clássica, pontual, e radiação proveniente de um detetor de Unruh-DeWitt. Rederivamos os campos de uma carga em movimento hiperbólico e mostramos através deste exemplo que radiação não é geralmente covariante. Calculamos as taxas de emissão para detetores em movimento uniformemente acelerado e movimento uniforme através do vácuo de Minkowski. Concentramos em detetores ligados por tempo finito
We study the concept of radiation in two apparently distinct contexts: radiation coming from a classical pointlike charge, and radiation coming from an Unruh-DeWitt detector. We rederive the fields for a charge in hyperbolic motion and use this example to show that the concept of radiation is not a generally covariant one. We calculate the emission rates for uniformly accelerated and inertial detectors going through the Minkowski vacuum. We concentrate on finite-time detectors

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Peres, Clovis Belbute. "Radiação e detetores de Unruh - DeWitt /". São Paulo, 1993. http://hdl.handle.net/11449/132662.

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Orientador: George Emanuel Avraam Matsas
Banca: Ruben Aldrovandi
Banca:Alfredo Takashi Suzuki
Resumo: Estudamos o conceito de radiação em dois contextos aparentemente distintos: radiação proveniente de uma carga clássica, pontual, e radiação proveniente de um detetor de Unruh-DeWitt. Rederivamos os campos de uma carga em movimento hiperbólico e mostramos através deste exemplo que radiação não é geralmente covariante. Calculamos as taxas de emissão para detetores em movimento uniformemente acelerado e movimento uniforme através do vácuo de Minkowski. Concentramos em detetores ligados por tempo finito
Abstract: We study the concept of radiation in two apparently distinct contexts: radiation coming from a classical pointlike charge, and radiation coming from an Unruh-DeWitt detector. We rederive the fields for a charge in hyperbolic motion and use this example to show that the concept of radiation is not a generally covariant one. We calculate the emission rates for uniformly accelerated and inertial detectors going through the Minkowski vacuum. We concentrate on finite-time detectors
Mestre

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Hübner, Ute. "Franz Dewald : Das malerische Werk mit Oeuvreverzeichnis /". Münster : Lit, 1999. http://catalogue.bnf.fr/ark:/12148/cb389434716.

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Robles, Portilla Sandra Clarisa. "Local quantum thermometry using Unruh-DeWitt detectors". Master's thesis, Pontificia Universidad Católica del Perú, 2017. http://tesis.pucp.edu.pe/repositorio/handle/123456789/9945.

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En este trabajo, proponemos una definición operacional de la temperatura local de un campo cuántico usando detectores Unruh-DeWitt, de forma similar a la empleada en los efectos Unruh y Hawking. Con esta definición, un sistema cuántico inhomogéneo en equilibrio puede tener diferentes temperaturas locales, en analogía con el teorema de Tolman-Ehrenfest en relatividad general. Hemos estudiado la distribución de la temperatura local en el estado fundamental de un sistema fermiónico con términos de hopping en un espacio curvo. La temperatura observada tiende a cero conforme el acoplo termómetrosistema, g, disminuye. Además, para valores pequeños pero finitos de g, mostramos que el producto de la temperatura local observada y el logaritmo de la velocidad local de la luz es aproximadamente constante. Nuestras predicciones son susceptibles de comprobación en sistemas de átomos ultrafríos.
We propose an operational definition for the local temperature of a quantum field employing Unruh-DeWitt detectors, as used in the study of the Unruh and Hawking effects. With this definition, an inhomogeneous quantum system in equilibrium can have different local temperatures, in analogy with the Tolman-Ehrenfest theorem from general relativity. We have studied the local temperature distribution on the ground state of hopping fermionic systems on a curved background. The observed temperature tends to zero as the thermometer-system coupling, g, vanishes. Yet, for small but finite values of g, we show that the product of the observed local temperature and the logarithm of the local speed of light is approximately constant. Our predictions should be testable on ultracold atomic systems.
Tesis

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Acquaviva, Giovanni. "Tunnelling and Unruh-DeWitt methods in curved spacetimes". Doctoral thesis, Università degli studi di Trento, 2013. https://hdl.handle.net/11572/368925.

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The analysis and the results contained in this work are rooted in a first contact between the quantum theory and the general theory of relativity. By first contact it is meant that we are not considering candidates for “unified theories", but rather we focus on aspects of the full quantum theory in changing geometric backgrounds: the analysis of such an interaction already had important applications in cosmology, e.g. in the description of the evolution of fields in inflationary scenarios. Another compelling – and still growing – area of application is the study of thermodynamical properties of gravitional systems, which covers the main bulk of this thesis.

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Acquaviva, Giovanni. "Tunnelling and Unruh-DeWitt methods in curved spacetimes". Doctoral thesis, University of Trento, 2013. http://eprints-phd.biblio.unitn.it/890/1/thesis3.pdf.

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The analysis and the results contained in this work are rooted in a first contact between the quantum theory and the general theory of relativity. By first contact it is meant that we are not considering candidates for “unified theories", but rather we focus on aspects of the full quantum theory in changing geometric backgrounds: the analysis of such an interaction already had important applications in cosmology, e.g. in the description of the evolution of fields in inflationary scenarios. Another compelling – and still growing – area of application is the study of thermodynamical properties of gravitional systems, which covers the main bulk of this thesis.

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Dewald, Mario [Verfasser]. "Titanzerspanung: Ein Beitrag zur Erhöhung der Standzeit / Mario Dewald". Aachen : Shaker, 2012. http://d-nb.info/1067735070/34.

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Pretorius, Dewald Jacobus. "Effective medicine control for Platinum Health pharmacies / Dewald Jacobus Pretorius". Thesis, North-West University, 2010. http://hdl.handle.net/10394/4443.

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Effective Medicine Control is the essence of pharmaceutical service delivery and of financial management in Platinum Health Pharmacies. Platinum Health Pharmacies implement medicine control measures to enhance and optimise service delivery. As Platinum Health Pharmacies deliver a pharmaceutical service as business associates of Anglo Platinum, it serves the same workforce. The requirement of the pharmaceutical service delivery for Anglo Platinum is timely, appropriate and available medicine. Therefore, Platinum Health Pharmacies need to adhere to set criteria, those of ?Good Pharmacy Practice in South Africa? as applied to the control, procurement and prescribing of medication. The ordering and receiving of necessary medication forms a significant part of the criteria, as this is the source of medication to pharmacies. The subsequent management of medication as inventory and control over recall, storage, excess and disposal of expired medication serves the same purpose. Effective dispensing and distribution methods are therefore mandated to ensure timeously availability of correct medication. Finally, the success of effective medicine control is defined by the accuracy of the stock take ascertaining the results of managerial methods of medication. Platinum Health Pharmacies recorded an overall adherence level of 85 percent to the abovementioned criteria. This is a good indication of a strong, reliable and experienced pharmaceutical workforce that delivers an outstanding pharmaceutical service and is capable of maintaining effective medicine control. Although few shortcomings were identified, it is nevertheless recommended that Platinum Health Pharmacies plan the improvement of their risk management plans, and identify quality improvement projects in areas of medicine procurement. The implementation of key performance indicators, relevant to stock control, is also recommended. These, put into effect will assure optimisation of effective medicine control for Platinum Health Pharmacies, maintaining the benefits of cost containment and cost effective pharmaceutical service delivery.
Thesis (M.B.A.)--North-West University, Potchefstroom Campus, 2011.

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Valdivia, Lefort Patricio. "Design of an Efficient Harvester and Dewater Mechanism for Microalgae". Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/306344.

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Microalgae have now been widely considered as a promising bio-energy feedstock. The current microalgae harvesting methods used, such as centrifugation, sedimentation and flocculation, have been shown to be effective but are costly, representing between 35 % to 50 % of the total production cost. The aims of this study were: (1) to investigate the effectiveness of two electrocoagulation processes, electroflocculation and electroflotation, as algae pre-harvesting processes; and (2) to design, test and optimize a cost-effective and efficient filtration-based harvesting mechanism for micrioalgae. The principal results of the study showed that: (1) The mean final concentration for electroflocculation of 17.94 gL⁻¹ significantly exceeded (p = 0.0416) that for electroflotation of 9.51 gL⁻¹, indicating electroflocculation to be the more effective process; (2) Microscope images of the algae showed that, for the level of power applied (1 A, 40 V max), electrocoagulation did not appear to have produced any effect on the algae that was significantly different from that by centrifugation and that neither method appeared to have caused any significant cell wall damage or rupture; (3) The most effective configuration for the harvester prototype -- resulting in higher throughput rate (0.303 gh⁻¹), higher efficiency (233.33 gL⁻¹), as well as a lower energy consumption (143.46 kWhm⁻³) -- corresponded with higher concentration of the incoming biomass (21.5 gL⁻¹), lower belt velocity (0.05 ms⁻¹), higher inclination angle (25°) and lower pressure (0 Psi); and (4) The total energy consumption for the harvester prototype, when combined with a preceding pre-harvesting process, of 4.95 kWhm⁻³ was comparable to those reported by others for filtration-based harvesting. The new efficient harvesting mechanism proposed showed significant potential in successfully reducing algae production cost and make biofuels from microalgae economically feasible in the mid to long term in view of the prototype having achieved high output biomass concentration, low energy consumption per unit volume, high throughput rate, and facility of implementation.

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DeWitt, Sarah Louise. "Creating space for science and celebrity in the public discussion of climate change". Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/dewitt/DeWittS0806.pdf.

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Rother, Wolfram [Verfasser], Jan [Akademischer Betreuer] Jolie i Alfred [Akademischer Betreuer] Dewald. "Lifetime Measurements in 62,64,66Fe / Wolfram Rother. Gutachter: Jan Jolie ; Alfred Dewald". Köln : Universitäts- und Stadtbibliothek Köln, 2011. http://d-nb.info/103801557X/34.

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Dewes, Michaela [Verfasser]. "Kaliumkanalexpression auf adulten murinen neuronalen Progenitorzellen / Michaela Dewes". Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2015. http://d-nb.info/1075757398/34.

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Dewald, Inna [Verfasser], i Andreas [Akademischer Betreuer] Fery. "Responsive Coatings Made from Colloidal Building Blocks / Inna Dewald ; Betreuer: Andreas Fery". Bayreuth : Universität Bayreuth, 2017. http://d-nb.info/1132200989/34.

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Dutta, Parikshit [Verfasser]. "The DeWitt equation in Quantum Field Theory and its applications / Parikshit Dutta". Berlin : Freie Universität Berlin, 2014. http://d-nb.info/1046833022/34.

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Oberholzer, Ian Dewald. "Evaluation of the enzyme inhibitory effect of carboxymethylated chitosan / Ian Dewald Oberholzer". Thesis, North-West University, 2003. http://hdl.handle.net/10394/245.

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Degradation of peroral administered drugs by various enzymes in the gastrointestinal tract has proven to be troublesome for the absorption' and bioavailability of protein and peptide drugs. Mucoadhesive polymers such as poly(acrylates) have proven to inhibit protease enzymes responsible for initiating digestion of peptide drugs. Enzyme inhibitors have unique chemical properties enabling it to interact with enzymes to form complexes with such enzymes prohibiting it from functioning properly. Anionic carboxymethylated chitosan derivatives such as N,N-dicarboxymethyl chitosan and N, O-carboxymethyl chitosan display unique structural similarities to enzyme inhibitors being anionic polymers that may interact with bi-valent cations...
Thesis (M.Sc. (Pharm.))--North-West University, Potchefstroom Campus, 2004.

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Steyn, Johan Dewald. "Nasal delivery of recombinant human growth hormone with pheroid technology / Dewald Steyn". Thesis, North-West University, 2006. http://hdl.handle.net/10394/1276.

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Over the past couple of years there has been rapid progress in the development and design of safe and effective delivery systems for the administration of protein and peptide drugs. The effective delivery of these type of drugs are not always as simple as one may think, due to various inherent characteristics of these compounds. Due to the hydrophilic nature and molecular size of peptide and protein drugs, such as recombinant human growth hormone, they are poorly absorbed across mucosal epithelia, both transcellularly and paracellularly. This problem can be overcome by the inclusion of absorption enhancers in peptide and protein drug formulations but this is not necessarily the best method to follow. This investigation focussed specifically on the evaluation of the ability of the PheroidTM carrier system to transport recombinant human growth hormone across mucosal epithelia especially when administered via the nasal cavity. The PheroidTM delivery system is a patented system consisting of a unique submicron emulsion type formulation. The PheroidTM delivery system, based on PheroidTM technology, will for ease of reading be called Pheroid(s) only throughout the rest of this dissertation. The Pheroid carrier system is a unique microcolloidal drug delivery system. A Pheroid is a stable structure within a novel therapeutic system which can be manipulated in terms of morphology, structure, size and function. Pheroids consist mainly of plant and essential fatty acids and can entrap, transport and deliver pharmacologically active compounds and other useful substances to the desired site of action. The specific objectives of this study can be summarised as follows: a literature study on Pheroid technology; a literature study on chitosan and N-trimethyl chitosan chloride; a literature study on recombinant human growth hormone (somatropin); a literature study on nasal drug administration; formulation of a suitable Pheroid carrier; entrapment of somatropin in the Pheroid carrier, and in vivo evaluation of nasal absorption of somatropin in Sprague-Dawley rats.
Thesis (M.Sc. (Pharmaceutics))--North-West University, Potchefstroom Campus, 2007.

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Dewitz, Helena von [Verfasser]. "Evaluation der Frakturheilung im osteoporotischen Tiermodell mittels Mikro-CT / Helena von Dewitz". Gießen : Universitätsbibliothek, 2016. http://d-nb.info/1098066901/34.

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Riggenmann, Konrad. "Escola nova, escola ativa! John Deweys Pädagogik am Beispiel ihrer Rezeption in Brasilien". Oldenburg pfv, 2001. http://www.freire.de/verlag/text203.html.

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Wentz, Robert. "Demokratie am Scheideweg : die Aktualität der Sozialphilosophie John Deweys für eine kritische Gesellschaftstheorie /". Berlin : wvb, Wiss. Verl, 2006. http://www.wvberlin.de/data/inhalt/wentz.htm.

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Riggenmann, Konrad. "Escola nova, escola ativa! : John Deweys Pädagogik am Beispiel ihrer Rezeption in Brasilien /". Oldenburg : pfv, 2006. http://www.freire.de/verlag/text203.html.

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Herbst, Dewald. "Single board computer based control of an active magnetic bearing / by Dewald Herbst". Thesis, North-West University, 2008. http://hdl.handle.net/10394/2641.

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The McTronX Research group at the North-West University is currently conducting research in the use of active magnetic bearings (AMBs) for a flywheel energy storage system (FESS). Together with this, the aim of this project is to take the level of control of such AMB systems to an industrial level. Instead of using a rapid prototype dSPACE® controller, a single board computer (SBC) is proposed. Issues to be addressed, includes: SBC overview, control system specifications, skills development for SBC, implementation and evaluation. All the digital and analogue input/output signal requirements for the FESS are determined prior to specifying an SBC. Six different SBCs were compared and in the end the SBC6713ell from Innovative Integration (II) was chosen and sourced. The SBC6713ell complies with all the requirements specified by the client. Two interface boards were used to integrate the SBC with the FESS. The first board contained all the protection circuitry to protect the controller from faults that could occur on the sensor and actuator side of the FESS and is used to connect the dSPACE® to the FESS without the SBC. After the hardware was integrated, the software/firmware integration started. On the SBC, the PD control was implemented for the AMBs as well as the voltage over frequency control for the PMSM. A graphical user interface (GUI) was further developed on a host computer to monitor the FESS. Four tests were done on the integration of the SBC with the FESS. Firstly the performance of the controller with regard to the control algorithms was tested. The stability and sensitivity analyses of the system followed and ended with the PMSM start-up test. The control algorithm execution time was longer than expected and adjustments to the sampling time had to be made. Stability tests showed a decrease in bearing stiffness and damping, which was due to low pass filters on the analogue to digital converter board. The sensitivity of the system also increased due to the effect of the filters on the system. The inconsistency in bearing damping and stiffness, obtained from the stability tests was verified by adding the filters to the simulation. These filters caused an attenuation of less than 1 dB, but resulted in a phase shift of -36.3° in the control loop. Industrial control was realised using an SBC, but further work is still necessary. The areas identified for future work is: non linear control algorithms, low noise digital power amplifiers, speed sensor and the PMSM drive.
Thesis (M.Ing. (Electrical and Electronic Engineering))--North-West University, Potchefstroom Campus, 2008.

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Dewitz, Julia [Verfasser]. "Selbstwertbestätigung/ Self-affirmation zur Erhöhung des Konsums von Obst und Gemüse / Julia Dewitz". Greifswald : Universitätsbibliothek Greifswald, 2017. http://d-nb.info/112928722X/34.

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DE, SOUZA CAMPOS LISSA. "Sondando gli effetti termici su spaziotempi statici con i rivelatori di Unruh-DeWitt". Doctoral thesis, Università degli studi di Pavia, 2022. http://hdl.handle.net/11571/1452087.

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Considero campi quantistici liberi, scalari, su spazio-tempi curvi per ottenere informazioni sull'interazione tra fenomeni quantistici e gravitazionali. Uso l'approccio del rivelatore Unruh-DeWitt per sondare gli effetti termici e quantistici su spaziotempi statici e non globalmente iperbolici. In questo contesto, tutte le osservabili fisiche dipendono dalla scelta di una condizione al contorno che non può essere individuata, in generale, senza ricorrere a un esperimento. Nonostante ciò, il framework applicato ammette una grande famiglia di condizioni al contorno (Robin) e ci garantisce dinamiche fisicamente sensibili e funzioni a due punti della forma Hadamard locale. Scopro che gli effetti anti-Unruh/Hawking non sono evidenti per gli stati termici sul buco nero BTZ, né per i buchi neri topologici senza massa di quattro dimensioni. Sebbene il significato fisico di questi effetti statistici rimanga sconcertante, il mio lavoro corrobora la loro relazione non banale con la condizione KMS e rivela l'influenza fondamentale della dimensione spaziotemporale nella loro manifestazione. Sui monopoli globali, trovo che per campi accoppiati minimamente privi di massa la velocità di transizione, le fluttuazioni termiche e la densità di energia rimangono finite alla singolarità solo per la condizione al contorno di Dirichlet. Per i campi accoppiati in modo conforme, sebbene la densità di energia diverga per tutte le condizioni al contorno, la velocità di transizione e le fluttuazioni termiche svaniscono al monopolio; indicando che anche se c'è energia infinita, non si verifica alcuna emissione spontanea se il campo quantistico non è fluttuante. Inoltre, costruisco esplicitamente funzioni a due punti per gli stati del suolo e termici sui buchi neri topologici di Lifshitz, ponendo le basi per future esplorazioni in questo contesto di rottura di Lorentz. Mi aspetto che il mio lavoro porti consapevolezza sull'intricato ruolo svolto dalla scelta di diverse condizioni al contorno, stimoli il dibattito sugli effetti termici sui buchi neri e sulle singolarità nude e promuova la potenza e l'utilità delle analisi semi-classiche.
In the lack of a full-fledged theory of quantum gravity, I consider free, scalar, quantum fields on curved spacetimes to gain insight into the interaction between quantum and gravitational phenomena. I employ the Unruh-DeWitt detector approach to probe thermal, quantum effects on static, non-globally hyperbolic spacetimes. In this context, all physical observables depend on the choice of a boundary condition that cannot be singled-out, in general, without resorting to an experiment. Notwithstanding, the framework applied admits a large family of (Robin) boundary conditions and grants us physically-sensible dynamics and two-point functions of local Hadamard form. I discover that the anti-Unruh/Hawking effects are not manifest for thermal states on the BTZ black hole, nor on massless topological black holes of four dimensions. Whilst the physical significance of these statistical effects remains puzzling, my work corroborates their non-trivial relation with the KMS condition and reveals the pivotal influence of the spacetime dimension in their manifestation. On global monopoles, I find that for massless minimally coupled fields the transition rate, the thermal fluctuations and the energy density remain finite at the singularity only for Dirichlet boundary condition. For conformally coupled fields, although the energy density diverges for all boundary conditions, the transition rate and the thermal fluctuations vanish at the monopole; indicating that even if there is infinite energy, no spontaneous emission occur if the quantum field is not fluctuating. Moreover, I explicitly construct two-point functions for ground and thermal states on Lifshitz topological black holes, setting the ground for future explorations in this Lorentz breaking context. I expect my work to bring awareness on the intricate role played by choosing different boundary conditions, to stimulate the debate on thermal effects on black holes and naked singularities, and to promote the power and usefulness of semi-classical analyses.

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McFadyen, Andrew Paul. "Agents and institutions : Donald Dewar and the politics of devolution". Thesis, University of Edinburgh, 2011. http://hdl.handle.net/1842/29261.

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The creation of the Scottish Parliament was a major change in UK politics and the empirical research presented in this thesis makes a significant contribution to knowledge by revealing new evidence about some of the key political processes that led-up to the new constitutional settlement. This thesis also addresses a gap in the academic literature and offers a different approach by marshalling the evidence in respect of a single individual actor: Donald Dewar. Whilst the existing literature largely explains the success of the home rule movement by focusing on structural changes in Scottish society - such as the politicisation of Scottish national identity - this thesis focuses on the role of agents and institutions in four critical junctures in the devolution debate. These are the process of writing and promoting the Labour Party's 1984 Green Paper on Devolution, the Labour Party's decision to participate in the Scottish Constitutional Convention, the decision to hold a pre-legislative referendum and the publication of the 1997 White Paper, Scotland's Parliament. The research is informed by a historical institutionalist rationale and builds on existing insights in the new institutionalist literature. One of the themes of this research is that while changing circumstances and external crises can create pressure for change, the way in which actors interact within institutions often defines the path that is taken. Institutions are the arenas in which actors engage with new ideas and set policy goals; they are the level at which individuals confront structural constraints and scenes of ongoing political skirmishing. This thesis therefore puts a central focus on understanding the inner life of the institutions in which policy on devolution was made. Understanding new innovations and departures requires the researcher to build a rich and detailed pictures of the circumstances in which actors form preferences and build coalitions. The dissertation addresses this challenge by adopting a multi-method approach that is both qualitative and historical - including process tracing, documentary analysis and semi-structured individual interviews with elite actors. The four 'nested' case studies presented in this thesis provide a detailed narrative that connects the different stages of the devolution debate and enable us to identify causal factors that played out over a long stretch of time. One remarkable feature of the historical sequence from Margaret Thatcher's election as Prime Minister in 1979 to the creation of the Scottish Parliament in 1999 is Donald Dewar's prominence from an early stage to its completion. This is one of those rare occasions when the decisions taken by an actor at particular points in the political process actually helped to create the structural and institutional constraints that guided his own future actions. One important new source of evidence that I have used to gain an insight into the Labour Party's internal debate is the record of the monthly meetings of the Parliamentary Labour Party: Scottish Group and the weekly meetings of the Executive Committee of the Parliamentary Labour Party: Scottish Group, from 1983 to 1997. The thesis adds to the historical record and challenges the current academic consensus about some of the key developments in the campaign for a Scottish Parliament. It also intended to make a contribution to the wider theoretical debate on the way in which agents interact within institutions and how this contributes to political change.

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Dewitz, Carola [Verfasser]. "Dissecting classical cadherins roles in motor neuron nuclear organization in the spinal cord / Carola Dewitz". Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1187244104/34.

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Dewald, Andreas [Verfasser], i Felix [Akademischer Betreuer] Freiling. "Formalisierung digitaler Spuren und ihre Einbettung in die Forensische Informatik / Andreas Dewald. Betreuer: Felix Freiling". Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2012. http://d-nb.info/1028977336/34.

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Van, Niekerk Dewald. "A comprehensive framework for multi-sphere disaster risk reduction in South Africa / Dewald van Niekerk". Thesis, North-West University, 2005. http://hdl.handle.net/10394/825.

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Since the 1960s there has been a constant evolution in the common understanding of international disaster management. Various measures and structures were created to plan for emergency relief and the management of a disastrous event. Despite all the international effort which was aimed at reducing the impact of natural and anthropogenic hazards on humankind, very little progress was made. Loss of life, property, infrastructure and economic livelihoods are on the increase without any indication of improvement. Developmental activities could in most instances be blamed for the high level of disaster risk present in communities. On the other hand, very little was done in the international arena (through a multi-disciplinary approach) to ensure a developmental focus on disaster risk. Despite the sometimes dismal situation in which especially the less developed world found themselves, some progress has been made in disaster risk reduction since the 1990s. Major disasters since the 1960s, as well as intensive media coverage of these events, have created a global awareness of the need to reduce disaster impacts. The aspects mentioned above, with the involvement of a variety of different disciplines and professional constituencies, gradually started to investigate and formulate an understanding of disaster risk. This, together with, the involvement of a variety of different disciplines and professional constituencies gradually led to the investigation and formulation of an understanding of disaster risk. The declaration of the International Decade of Natural Disaster Reduction (1 990-1 999) and the formulation of the International Strategy for Disaster Reduction (2000-201 0) confirmed the international importance of disaster risk reduction. South Africa, coming from a history of apartheid and discrimination, realised the void in caring for communities at risk. Severe floods in the Western Cape Province in 1997 heralded a new area in disaster management in South Africa. In 1998, a legislative process started which culminated in the promulgation of the Disaster Management Act 57 of 2002. Despite the international as well as national focus on the prevention and mitigation of disasters, their continuous impact and increase in losses were a clear indication that more than just pure disaster management should be undertaken. A paradigm shift gradually occurred where disasters were no longer seen as events to respond to. A focus on disaster risk reduction emerged. This focus is aimed at reducing the risk in which communities find themselves by using development interventions. Disaster risk reduction is not without its own challenges. The heightened emphasis on the subject matter by a variety of regional and international agencies showed that a concrete theoretical knowledge base was lacking. A need to identify all the aspects of which disaster risk reduction comprises evolved. Several international disaster risk reduction frameworks emerged aimed at providing qualitative and quantitative indicators to measure success in disaster risk reduction. This thesis aimed to develop a comprehensive multi-sphere disaster risk reduction framework that is tailor-made for the strategic management arena in South Africa. The research provides the reader with a background study on the international development of the concept of disaster risk reduction and its components. It focuses on disaster risk management and disaster management within the South African context. Four international disaster risk reduction frameworks are analytically compared and aligned with international best practices. Subsequently the South African national disaster management policy framework (the National Disaster Management Framework) is analysed and compared to the findings of the international comparison. This research further made use of focus group interviews for data collection. Specialists in the field of disaster risk management in South Africa formed part of the focus group interviews which served as a form of triangulation between the described processes and the reality in the South African public sector. In conclusion this thesis provides a new disaster risk reduction framework for application in the strategic management sector on all levels of government. The framework is comprehensive, yet flexible enough, to be adapted for tactical and operational implementation.
Thesis (Ph.D. (Public Management and Administration))--North-West University, Potchefstroom Campus, 2005.

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Dewitz, Burkhard von [Verfasser]. "Drivers, dynamics and management of Eastern Baltic cod (Gadus morhua) reproduction habitat / Burkhard von Dewitz". Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1168229340/34.

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Nagaoka, Gabriel Nicolaz. "Introdução às Anomalias Conformes e os Teoremas C & F". Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-04052018-140729/.

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As ideias fundamentais sobre entropia de emaranhamento e fluxos de renormalização são expostas, assim como uma introdução a CFTs e sua ligacão com a estrutura do espaco de parâmetros. A anomalia de traço é calculada em uma abordagem semi-clássica usando o método de heat kernel\" e regularização por função zeta . Mostramos que os coeficientes de Seeley-DeWitt são responsáveis pela quebra de simetria conforme em um espaço-tempo curvo de dimensão par, com isso alcançamos uma definição geométrica para as cargas centrais. A inexistência de anomalias no caso de dimensões ímpares também e mostrado. O C-theorem\", que prova a monotonicidade das cargas centrais sob o fluxo de renormalização, é demonstrado como feito por Zamolodchikov por meio de uma abordagem euclideana assumindo unitariedade, positividade por reflexão e condições de renormalizabilidade. A análise feita por Cardy também e demonstrada, nela considera-se os mesmos ingredientes. Por fim, a prova tecida por Casini & Huerta é demonstrada com detalhes, essa prova utiliza das propriedades de strong subadditivity da entropia de emaranhamento, unitariedade e invariância sob o grupo de Poincaré. Com isso, uma conexão com informação quântica é feita naturalmente. No último capítulo generalizamos o conceito de carga central para dimensões ímpares as definindo como o termo universal na entropia de emarahamento de uma esfera. As considerações geométricas feitas para provar o C-theorem\" são estendidas para um espaço-tempo de Minkowski com três dimensões. Como consequência temos a prova do F-theorem\" que é o analogo em três dimensões do C-theorem\".
The fundamental ideas of entanglement entropy and RG flows are laid out, as well as the basics of CFTs and its connection to the framework of RG flows. The trace anomaly is calculated in a semi-classical fashion by using the heat kernel method and zeta-function regularization. It is shown that the Seeley-DeWitt coefficients are responsible for the breaking of conformal symmetry in a curved even-dimensional background, which also achieves a geometrical definition of a central charge. The absence of anomalies in odd space-time dimensions is also contemplated. The C-theorem, which proves the monotonicity of the two dimensional central charge under RG flows, is demonstrated as first done by Zamolodchikov in an euclidean approach assuming unitarity, reflection positivity, and renormalizability conditions. Cardy\'s analysis is also demonstrated by considering the same conditions as Zamolodchikovs . And at last the proof via entanglement entropy by Casini & Huerta which relies on the strong subadditivity property of EE, unitarity and Poincaré invariance is explained in detail, providing a quantum information approach to the problem. In the last chapter a generalization of central charges to odd dimensional space-times is given through the universal term of the EE of a sphere. We provide the extension of the geometrical setup considered in the proof of the C-theorem to a three dimensional Minkowski space-time, which ultimately yields the F-theorem, constituting the three dimensional analog of the C-theorem.

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Dewald, Anika [Verfasser], i Horst [Akademischer Betreuer] Lohnstein. "Versetzungsstrukturen im Deutschen : Zu ihrer Syntax, Prosodie und Diskursfunktion [[Elektronische Ressource]] / Anika Dewald. Gutachter: Horst Lohnstein". Köln : Universitäts- und Stadtbibliothek Köln, 2013. http://d-nb.info/1047666472/34.

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Dewitz, Marco [Verfasser], Willibald A. [Akademischer Betreuer] Günthner, Willibald A. [Gutachter] Günthner i Gunther [Gutachter] Reinhart. "Fahrplanoptimierung für getaktete Routenzugsysteme / Marco Dewitz ; Gutachter: Willibald A. Günthner, Gunther Reinhart ; Betreuer: Willibald A. Günthner". München : Universitätsbibliothek der TU München, 2020. http://d-nb.info/121583778X/34.

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Dewan, Rahul [Verfasser]. "Optics in thin-film silicon solar cells with periodic surface texture / Rahul Dewan". Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2012. http://d-nb.info/1035209608/34.

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Dewes, Patricia [Verfasser]. "Inkrementelle prognostische Relevanz der Stress-Perfusions-Magnetresonanztomographie bei stabiler Angina pectoris / Patricia Dewes". Ulm : Universität Ulm. Medizinische Fakultät, 2013. http://d-nb.info/1044023341/34.

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Eikseth, Astrid Grude. "Etiske perspektiver på læreres og førskolelæreres pedagogiske erfaringer : En etnografis studie i lys av John Deweys flosofi". Doctoral thesis, Norwegian University of Science and Technology, Faculty of Social Sciences and Technology Management, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1940.

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Roudén, Magnus. "Varför En Reformerad Gymnasieskola 2011? : En reformanalys utifrån rektorer och lärares uppfattningar – kopplat till John Deweys teorier". Thesis, Linnéuniversitetet, Institutionen för samhällsvetenskaper, SV, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-11007.

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This empirical work and base has been to analyze the government’s investigation (SOU 2008:27): the future road – a reformed high school, which led to the high school reform that the Swedish government introduced as proposition (2008/09:199) about: Higher demand and quality within the high school. Skolverket (part of the Swedish government) has worked with the development of this steering document within their own mission Gy2011 in connection with the high schools during the transition. The reform comes into effect 1 of July 2011. This led to the main purpose to ask questions what high school principals and teachers think of the reform and to what extent it effects the high school programs, the examination system, what impact they see on the individual and the demand from society, and to some extent what the respondent´s answers about the government’s definition of what the higher demand and quality in the reform signify. The scientific base of this method has also been to analyze the pedagogue and the pragmatic John Dewey’s theories connected to the SOU 2008:27, Gy2011, historical reforms and education politics through scientists and views in a changeable society. The result shows that the principals and teachers have high hopes that the reform can lead to equal value in a national view and that the evaluation will become easier with less local freedom within the high school programs. They see a problem with present-days high-school that everyone in the system is able to reach university qualification. But this “school for everybody” hasn’t worked when the knowledge condition is too different among students. The respondents see that the student’s theoretical knowledge from the primary school (with only three approved school subjects) makes it tough to reach the goal in the high school programs – this doesn’t answer the quality demand from the market and the customer. The result also shows that the demand on awareness on students (and parents) will be harder when too choose either a university- or an occupational training program (examination). The respondents seem to agree (with the reform and state investigator) that the definition on the difference between the examinations makes it clearer what the education plans (and the goals) actually leads to for the students. When scientific theories in these analyzes is placed against the reform, the result shows that Dewey’s theories is much current as an organic pragmatic education process (the individual in interaction with society), today’s school system isn’t up to date in the process with society and the consumer (the buyer). The politics within the government has been to slow to reform the high school – the consequence has led to that students haven’t been able to reach the goals during their education programs (the obscurity has been obvious). The lack of equal value of high school education is a national quality problem.

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Eikseth, Astrid Grude. "Etiske perspektiver på læreres og førskolelæreres pedagogiske erfaringer : en etnografisk studie i lys av John Deweys filosofi /". Trondheim : Norges teknisk-narurvitenskapelige universitet, 2008. http://www.diva-portal.org/diva/getDocument?urn_nbn_no_ntnu_diva-1940-1__fulltext.pdf.

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SANTOS, Fábio Magalhães de Novaes. "Cosmologia inflacionária e o problema da medida". Universidade Federal de Pernambuco, 2009. https://repositorio.ufpe.br/handle/123456789/6458.

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Made available in DSpace on 2014-06-12T18:05:14Z (GMT). No. of bitstreams: 2 arquivo577_1.pdf: 3475189 bytes, checksum: 05c1943b3c5a1d5f1e44faecc54366cd (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2009
Conselho Nacional de Desenvolvimento Científico e Tecnológico
No século XX, a cosmologia deixou o campo da metafísica para ser consolidada como um ramo da ciência teórica e experimental. Nos últimos anos tem sido observado um grande avanço no importante aparato observacional da cosmologia tornando possível sondar eventos físicos que ocorreram a cerca de 13 bilhões de anos, supostamente ocorridos próximos à singularidade inicial conhecida como Big Bang. Entretanto, muitos mistérios permanecem esperando para ser resolvidos neste novo e promissor século. Entre eles estão as questões da formação de estruturas cosmológicas e das flutuações de densidade na radiação cósmica de fundo (CMB). A solução mais popular parece ser a chamada inflação cosmológica, a ideia de que um período de expansão acelerada ocorrido cerca de 10��43 s após o início do Universo poderia explicar as condições iniciais do Big Bang e o espectro da CMB. Neste trabalho, analisamos a generalidade do modelo mais simples e mais usado na literatura, o modelo f-FRW, e suas propriedades no espaço de fase da teoria. A ação estudada consiste na de Einstein-Hilbert onde supomos uma métrica do tipo Robertson-Walker acoplada com um campo escalar f e um potencial arbitrário V(f). Aplicamos a equação de Wheeler-DeWitt no modelo f-FRW e, então, propomos uma medida quântica no espaço de fase modificada pelo princípio holográfico de forma a contar heuristicamente a degenerescência proveniente dos graus de liberdade quânticos da gravitação

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Jones, Gwenda Rhian. "Croesffordd dewis dyheadau a thueddiadau disgyblion ol-16 cyfrwng Cymraeg wrth ddewis addysg uwch". Thesis, Bangor University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536485.

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Stoffelshaus, Nicole [Verfasser], Hartmut [Akademischer Betreuer] Witte, Mario [Akademischer Betreuer] Dewald i Peter [Gutachter] Kurtz. "Ein Beitrag zur Optimierung des Wissenstransfers in der Einzelfertigung / Nicole Stoffelshaus ; Gutachter: Peter Kurtz ; Hartmut Witte, Mario Dewald". Ilmenau : TU Ilmenau, 2020. http://d-nb.info/1219429317/34.

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Dewitz, Antje von [Verfasser]. "Die Gestaltung eines leistungsstarken Arbeitsverhältnisses durch "Talent Relationship Management" : Ein praxisorientiertes Konzept für mittelständische Unternehmen / Antje von Dewitz". Aachen : Shaker, 2006. http://d-nb.info/117052902X/34.

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Pissulla, Thomas [Verfasser], Alfred [Akademischer Betreuer] Dewald i Jan [Akademischer Betreuer] Jolie. "Kernstrukturuntersuchungen an 180,181Os durch Messung elektromagnetischer Übergangswahrscheinlichkeiten und Weiterentwicklung von Analysesoftware / Thomas Pissulla. Gutachter: Alfred Dewald ; Jan Jolie". Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1048677001/34.

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Dewitz, Hauke [Verfasser]. "Ergebnisse nach Revisionseingriffen nach vorderer Kreuzbandruptur mit modifizierter ovalärer Einkanal-Technik mit Hamstringsehnen als Vierfach-Implantat / Hauke Dewitz". Köln : Deutsche Zentralbibliothek für Medizin, 2011. http://d-nb.info/1018662464/34.

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Chiu, Ming. "Patterned and Structured Polymer Coatings for Atmospheric Water Capture". Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/26945.

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Polymer coatings are a versatile, efficient, and up-scalable platform for fabricating functionalised surfaces in many different applications. Functional surfaces, in particular, can be achieved by inducing a surface structure or a pattern within a polymer film, and in this Thesis, the focus has been on investigating functional structures that self-assemble spontaneously on a surface. Firstly, a polymer thin film coated on a non-wettable substrate is metastable and, if allowed to relax, may dewet into isolated droplets over the substrate. A novel phenomenon occurring in bilayers of spin-coated polymer films (of polar poly (4-vinylpyridine) (P4VP) on top of polystyrene (PS)) was investigated whereby dewetted P4VP droplets spontaneously align on the PS substrate, and the alignment extends over a large scale (millimetres). The aligned pattern results from a series of aligned defects on the P4VP film, which are formed during spin-coating. Secondly, a homogeneous ternary polymer mixture with a good solvent and a poor solvent is prone to undergoing phase separation (or phase inversion). As the good solvent evaporates, it triggers the mixture to separate into a polymer-rich phase and a polymer-lean phase mainly consisting of the solvent and non-solvent. When the latter evaporate, they leave a high density of air voids, and the final material is a highly porous polymer layer. Here, a structured porous polymer layer based on poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) was used as a platform for passive cooling and water collection. The phase inversion process was investigated as a function of a number of system parameters such as polymer grade, mixture composition, layer thickness, and humidity of the environment during phase inversion. The surfaces were then integrated within a prototype for passive atmospheric water harvesting, demonstrating promising avenues for future research.

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Sun, Chun-Mei. "La peinture moderne à Taiwan : les influences japonaises et occidentales : l'exemple de Chen Dewang (1910-1984) et le groupe "Mouve" (fondé en 1937)". Paris 4, 2001. http://www.theses.fr/2001PA040070.

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Pendant la période de l'occupation japonaise (1895-1945), émerge à Taiwan une peinture moderne dont l'un des représentants majeurs est Chen Dewang (1910-1984). L'évolution des institutions artistiques, inspirées du modèle japonais, a eu des conséquences importantes sur le développement de l'art contemporain à Taiwan que nous étudions ici à travers l'oeuvre de ce peintre et de ses réflexions sur l'art, notamment au sein du groupe "Mouve" de 1937 à 1942. Jusqu'en 1945, les critiques sont presque exclusivement rédigées par des auteurs japonais ou formés par des maîtres japonais ayant voyagé en Europe. A partir des années cinquante, les Taiwanais prennent le relais. Ce n'est que vers les années quatre-vingt que les Occidentaux s'intéressent à cet art qui mêle la tradition picturale chinoise à des techniques occidentales qui ont transité par le Japon. Cependant, ces diverses analyses sont rarement synthétiques et souvent contradictoires. En les confrontant aux oeuvres de Cheng Dewang d'après la guerre, nous tentons d'analyser le rôle de ces influences extérieures sur la peinture à Taiwan, en essayant de voir si elles ont eu un rôle déterminant sur la naissance d'une peinture moderne
During the period of Japanese occupation (1895-1945) emerges in Taiwan a modern painting. Among its representatives one of great importance is Cheng Dewang (1910-1984). .

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