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1
Djelloul, Eric. "Contrôle particulaire des solutions injectables." Paris 5, 1988. http://www.theses.fr/1988PA05P246.
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Nydén, Magnus. "NMR diffusion studies of microheterogeneous systems surfactant solutions, polymers solutions and gels /." Lund : University of Lund, 1998. http://catalog.hathitrust.org/api/volumes/oclc/68945132.html.
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Silvester, Debbie Sue. "Electrochemical studies in room temperature ionic liquids." Thesis, University of Oxford, 2008. http://ora.ox.ac.uk/objects/uuid:be9e6269-f19a-48de-96e3-41c0c7143d6a.
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The work presented in this thesis involves the application of room temperature ionic liquids (RTILs) as solvents for use in electrochemical experiments. Initially, the fundamentals of electrochemistry is presented, followed by a comprehensive overview of RTILs in terms of their properties, applications and their behaviour as electrochemical solvents compared to conventional aprotic solvents. The results of 8 original studies are then presented as follows: X-Ray photoelectron spectroscopy is used to quantify the concentration of bromide ions in an ionic liquid, and is independently confirmed by potential-step chronoamperometry. The reaction mechanisms and kinetics for the electrochemical reduction of some aromatic nitro compounds (namely nitrobenzene and 4-nitrophenol) are determined. The electrochemistry of phosphorus trichloride and phosphorus oxychloride is studied in detail for the first time, due to the unusual stability of these highly reactive compounds in RTILs. The reductions and oxidations of sodium and potassium nitrate are studied, giving rise to 'melt'-like behaviour. The electrodeposition of sodium oxide on platinum is also demonstrated. The electrochemical oxidation of nitrite and the oxidation and reduction of the toxic gas, nitrogen dioxide, is presented. The oxidation of hydrogen gas is studied in ten RTILs with a range of different cations and anions, and contrasting interactions with the RTIL anions are seen. The electrochemical oxidation of ammonia gas is studied in five RTILs with different anions and a general reaction mechanism is suggested. The reduction of benzoic acid is studied in six RTILs, and the kinetics of the dissociation step are found to be very fast. The first five studies are all carried out in one particular ionic liquid, and the reactions and mechanisms are compared to that observed in conventional aprotic solvents. The last three studies employ several RTILs with different cations and anions to look at the contrasting interaction of protons with the RTIL cation/anion and ultimately help to understand the pH properties of the solvent. The overall findings from the work in this thesis are that some reactions and mechanisms (e.g bromide, nitro derivatives and ammonia) are generally the same in RTILs as in conventional aprotic solvents, but other species (e.g. nitrates, phosphorus derivatives) show remarkably different behaviour. It has also been demonstrated that RTILs are suitable media for the detection of nitrogen dioxide, hydrogen and ammonia gases. This suggests that RTILs could potentially offer many advantages when employed as solvents in electrochemical reactions and in amperometric gas sensors.
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Akilan, Chandrika. "Thermodynamic and related studies of aqueous copper (II) sulfate solutions /." Akilan, Chandrika (2008) Thermodynamic and related studies of aqueous copper(II) sulfate solutions. PhD thesis, Murdoch University, 2008. http://researchrepository.murdoch.edu.au/453/.
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This thesis describes a systematic investigation of the thermodynamic quantities associated with the interaction between Cu2+ and SO42- in aqueous solution. A variety of techniques including UV-Visible spectrophotometry, Cu(II) ion-selective electrode potentiometry, dielectric relaxation spectroscopy and titration calorimetry have been used.
The values for the (aq) association constants determined by UV-Vis spectrophotometry in NaClO4 media as a function of ionic strength were in good agreement with published data but were lower than the values obtained from Cu(II) ion -selective electrode potentiometry. The source of this difference was traced to the presence of solvent-separated ion pairs which are only partially detected by UV-Vis spectrophotometry. This was shown by a detailed investigation of CuSO4(aq) over a wide range of concentrations using modern broad-band dielectric relaxation spectroscopy (DRS). This technique revealed the presence of three ion-pair types: double solvent-separated, solvent-shared and contact ion pairs.
Calorimetric titrations using the log KA values determined by potentiometry, have provided for the first time reliable values for the enthalpy and entropy changes associated with complex formation between Cu2+(aq) and SO42-(aq) system over range of ionic strengths (in NaClO4 media). These data were fitted to a specific ion interaction model to obtain the standard state value which was in excellent agreement with the values obtained in other studies and from the DRS work in this study.
In addition, investigations have been carried out into the physicochemical properties, (osmotic coefficients, densities, heat capacities, solubilities and viscosities) of ternary mixtures of CuSO4(aq) with Na2SO4(aq) or MgSO4(aq). The isopiestic measurements (water activities) of the mixtures were in general well described by Zdanovskii's rule, especially for the mixtures of CuSO4 with MgSO4. The densities of the ternary mixtures of CuSO4 with MgSO4 were found to follow Young's rule of mixing but those of CuSO4 with Na2SO4 deviated from linearity. The solubilities of the salts in their ternary mixtures agree well with literature data and show that the solubility of MgSO4 or CuSO4 decreases with increasing Na2SO4 concentration. The viscosities of all the ternary mixtures show clear negative departures from 'Young's rule' type behaviour.
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Leff, Robert Daniel. "Elegant solutions." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10549.
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Ocampo, Hoyos Marcelo, and Victor Sandoval. "Home Solutions." Tesis, Universidad de Chile, 2017. http://repositorio.uchile.cl/handle/2250/146132.
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TESIS PARA OPTAR AL GRADO DE MAGÍSTER EN ADMINISTRACIÓNMarcelo Ocampo Hoyos [Parte I], Victor Sandoval [Parte II]
Panamá ha experimentado durante los últimos años un crecimiento económico importante en la región, uno de los factores principales que ha aportado a ese crecimiento ha sido la importante inversión extranjera que ha entrado al país; esta ha traído consigo una gran migración de personas hacia el país, esto junto a la centralización del País en la ciudad capital y los altos costos de alquiler y compra han generado un crecimiento notable del déficit habitacional que afronta, este ha venido creciendo a razón de 15 mil viviendas por año, cerrando el 2016 con una cifra cercana a las 25 mil viviendas; a partir de lo anterior y teniendo en cuenta el peso importante que presenta la industria inmobiliaria dentro de la economía del país (un 8.13% del PIB) nace Home Solutions con el objetivo de ofrecer al mercado una opción de vivienda alternativa en alquiler de tipo ejecutiva o apartamento unipersonal ecológicamente responsable en el corazón de la Ciudad de Panamá (Zonas: San Francisco, Bellavista y Avenida Balboa), mediante módulos habitaciones prefabricados que cuentan con espacios confortables y con todas las facilidades de una vivienda estándar; las principales ventajas competitivas se basan en la diferenciación del concepto inmobiliario tradicional y su modelo de construcción amigable con el medio ambiente. La propuesta está enfocada en profesionales, parejas y ejecutivos de paso con nivel socio económico medio-alto que dan un valor importante a la ubicación y al cuidado del medio ambiente; el tamaño de mercado estimado es de $12,618,622. El análisis financiero realizado muestra que tan solo se requiere $286,740 para el desarrollo de un complejo de 40 apartamentos unipersonales en el corazón de la ciudad y que en un horizonte de evaluación de 10 años el VAN del mismo es de $148,259 arrojando una TIR de 27%, de acuerdo a esto se observa que la inversión se recupera en 4.4 años, un periodo demasiado corto para un proyecto inmobiliario, convirtiendo a Home Solutions en un proyecto que promete una buena rentabilidad.
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Germain, Pierre. "Solutions fortes, solutions faibles d'équations aux dérivées partielles d'évolution." Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00001901.
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Nous exposons en introduction quelques généralités sur les solutions fortes et les solutions faibles d'équations aux dérivées partielles. Le chapitre 2 est consacré à l'étude des multiplicateurs et des paramultiplicateurs entre espaces de Sobolev. Si l'opérateur de multiplication ponctuelle par une fonction est borné d'un espace de Sobolev dans un autre, on dit que cette fonction est un multiplicateur entre ces espaces. On définit de même les paramultiplicateurs par le caractère borné de l'opérateur de paraproduit de Bony. Nous prouvons une caractérisation presque complète des espaces de multiplicateurs et de paramultiplicateurs. Cette caractérisation est appliquée dans le chapitre 3 au problème de l'unicité fort-faible pour l'équation de Navier-Stokes en dimension d > ou = 3. Elle nous permet de prouver un théorème d'unicité fort-faible généralisant presque tous les résultats connus. Nous nous intéressons dans le chapitre 4 aux solutions d'énergie inféie de l'équation de Navier-Stokes en dimension 2. Un théorème de Gallagher et Planchon affirme qu'une solution globale existe si la donnée initiale appartient à un espace de Besov critique ; nous étendons ce théorème au cas où u0 appartient @BMO, qui semble optimal. Nous prouvons dans le chapitre 5 des résultats d'existence globale pour l'équation des ondes semi-linéaire critique (avec non-linéarité polynomiale), pour une donnée initiale d'énergie infinie et de norme arbitrairement grande. Deux méthodes d'interpolation non-linéaire sont employées : la méthode de Calderon et la méthode de Bourgain ; elles donnent des résultats complémentaires. Le chapitre 6 est consacré à des rappels, et nous mentionnons dans le chapitre 7 quelques perspectives possibles.
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Galinier, Colette. "Dissolution et précipitation des solutions solides (Ba, Sr)SO en solution aqueuse." Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37613761f.
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Merkley, Keith E. "Enthalpies of Solution of CO2 in Aqueous Methyldiethanolamine Solutions." BYU ScholarsArchive, 1987. https://scholarsarchive.byu.edu/etd/6522.
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The enthalpies of solution, HS, of carbon dioxide in aqueous methyldiethanolamine were measured with an isothermal flow calorimeter over wide ranges of temperature, pressure, weight percent MDEA, and loading (gmole CO2/gmole MDEA). The values of HS (kJ/gmole CO2) were found to be constant up to the saturation concentration of CO2 in the aqueous solution. In addition, experimental data showed that HS was independent of the total pressure over the solution, but linearly dependent upon both temperature and weight percent MDEA as was given by a correlation. A computer program based upon basic thermodynamic quantities was developed to model HS of CO2 in MDEA solutions. The values of K and ΔH for each of the chemical reactions (except the MDEA protonation reaction) were fitted values from the literature. Activity coefficient correlations used in the program were also obtained from the literature. Using these data, the program was first used to find the values of K and ΔH for the MDEA protonation reaction which gave the minimum error between the model and the experimental data. Finally, the values of HS predicted by the program were compared to the experimental data and the differences were discussed.
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Chen, Sixuan. "A study of game theory : on solutions and applications in cooperative games : Nash bargaining solution, the bargaining set family and other cooperative solutions /." Connect to online version, 2006. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2006/150.pdf.
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Žilinskij, Grigorij. "Investment portfolio solutions." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130129_192449-58952.
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The dissertation analyses the topic and problems of selection and management of investment portfolio in terms of market dynamics. The global financial crisis has revealed that investments bear not only return possibilities but also a relatively high risk of loss.
The main aim of the Thesis is to propose and test empirically investment portfolio selection and management solutions matching the tendencies of modern markets for the investors with different investing preferences.
The Doctoral Thesis consists of the introduction, three body chapters and conclusions.
The introduction presents the scientific problem, its relevance, the object of the research, the aim and tasks of the research, methods of research, scientific novelty of the Thesis, practical significance of its results and defended statements.
The first chapter provides analysis of possibilities for a widely diversified investment portfolio selection. The study of proposals of scientists on different assets combining into an investment portfolio is carried out. Portfolio of exchange traded funds is created and its efficiency is evaluated. The method for actually incurred risk evaluation is suggested.
Solutions for active investment portfolio management with financial leverage are specified in the second chapter. The changes of efficient set of portfolios and expediency of active portfolio management with financial leverage are evaluated. Forecasts integration method, based on prediction accuracy in the past, is... [to full text]Disertacijoje nagrinėjama investicijų portfelio sudarymo ir valdymo rinkų dinamikos sąlygomis problematika. Globali finansų krizė parodė, kad investuojant atsiranda ne tik uždarbio galimybės, bet ir gana didelė praradimų rizika. Pagrindinis disertacijos tikslas – pasiūlyti ir empiriškai aprobuoti šiuolaikinių rinkų dinamikos iššūkius atitinkančius investicijų portfelio sudarymo ir valdymo sprendimus skirtingus investavimo polinkius turintiems investuotojams. Daktaro disertaciją sudaro įvadas, trys skyriai ir bendrosios išvados. Įvade suformuluojama mokslinė darbo problema, pagrindžiamas jos aktualumas, įvardijamas tyrimo objektas, darbo tikslas ir uždaviniai, pristatoma tyrimo metodika, darbo mokslinis naujumas ir gautų rezultatų praktinė reikšmė, įvardijami ginamieji teiginiai. Pirmajame skyriuje nagrinėjamos plačiai diversifikuoto investicijų portfelio sudarymo galimybės. Įvertinami mokslininkų pasiūlymai dėl skirtingų aktyvų (investicinio turto klasių) įtraukimo į investicijų portfelį, sudarytas biržoje prekiaujamų fondų portfelis ir įvertintas jo efektyvumas. Pasiūlytas investuotojo realiai patirtos rizikos vertinimo metodas. Antrajame skyriuje detalizuoti aktyvaus investicijų portfelio valdymo taikant finansinį svertą sprendimai. Įvertinti efektyviosios portfelių ribos pokyčiai bei aktyvaus portfelio valdymo taikant finansinį svertą tikslingumas. Pasiūlytas prognozavimo tikslumu praeityje paremtas prognozių integravimo metodas ir įvertintas jo efektyvumas integruojant... [toliau žr. visą tekstą]
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Klett, Sven. "Creating Thermal Solutions." Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21506.
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Redesign einer Halbleiterklammer mittels Topologieoptimierung und integrierter FEM Rechnung.
Optimierung mittels Inspire von solidThinking. Halbleiterklammer zur Sicherstellung der Kühlung von IGBT Bausteinen in Hochstromapplikationen.
Optimierung unter der Restriktion verfügbarer Fertigungsverfahren.
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Pávek, Jan. "Microsoft Solutions Framework." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-3309.
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Tato práce je zaměřena na metodický rámec Microsoft Solutions Framework (MSF), který slouží jako základ pro vytváření metodik pro vývoj softwaru. Cílem je jednak tento rámec popsat (převážně z důvodu nedostatku příslušných materiálů v češtině) a srovnat jej s několika dalšími známými metodikami. Také se zaměřuje na některé principy a pojmy definované v MSF, které jsou integrovány ve vývojovém prostředí od Microsoftu, Visual Studio Team System.
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Michon, Chantal. "Assurance de la qualité des solutions pour nutrition parentérale." Paris 5, 1990. http://www.theses.fr/1990PA05P080.
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Johansson, Elisabeth. "Understanding Solution Quality." Doctoral thesis, Linköpings universitet, Logistik- och kvalitetsutveckling, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-128274.
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The integration of services and products into solutions can open up new business opportunities for firms. This thesis concerns how firms can provide solutions that are perceived as high quality. Solutions are often provided over several years, which implies a changed customer relationship compared to product provisions. Since the solution aims to support the customer’s activities, firms face new challenges when introducing solutions. One challenge is to integrate all components and activities of the solution, and simultaneously support the customer’s activities. In addition, the firm must ensure that the solution and all of its parts are of high quality. Most of the existing research on quality is related to the management of a firm’s internal activities and the interaction during exchange. Within the research on quality, customer orientation means that a firm should manage the relevant product or service to meet customer requirements. When this is achieved, the product or service is of high quality. Since solutions are seen as services and products that are integrated as an outcome, as well as a customer relational process that aims to support the customer’s activities, firms have little to learn from previous research about the quality of solutions. The aim of this thesis is to increase knowledge about how to manage solution quality. The thesis combines insights from research on quality with research on solutions and servitization. Three research questions are answered. The first question concerns the content of solution quality; the second deals with how firms can, with support from interventions, meet the new challenges that arise from solution provision; and the third question concerns how customers can be involved to achieve solution quality. The research questions are answered through five papers based on literature studies and empirical data. The papers contribute to an increased knowledge of solution quality and how firms can work to achieve it. The results of the thesis suggest that solution quality is built on seven quality dimensions: reliability, communicability, internal consistency, empathy, approachability, tangibility, and adaptability. In addition, knowledge of processes and customer relationships are two prerequisites for the concept. These dimensions and prerequisites are supported by interventions that can provide a change. However, it has become evident that whatever intervention is used must be related to the dimensions that are supposed to be improved. Furthermore, customer involvement is argued to be an intervention to support the prerequisites for solution quality, especially during the solution development. The results of this thesis extend the research on quality by increasing the knowledge of the solution quality concept and by changing the view of customers and their involvement during solution development.Den här avhandlingen berör hur företag kan möjliggöra så att produkter och tjänster, integrerade i så kallade helhetslösningar, kan levereras med hög kvalitet. Helhetslösningar levereras ofta över en längre tid vilket medför en förändrad kundrelation till skillnad mot när endast en produkt levereras. Helhetslösningar syftar till att stödja kunden i dess aktiviteter. Det medför att företagen möter nya utmaningar. En utmaning är att få den komplexa helhetslösningen, bestående av olika komponenter och aktiviteter, att passa ihop och samtidigt bidra till att stötta kundens aktiviteter. Dessutom behöver företagen säkerställa att helhetslösningen och alla dess delar har hög kvalitet. Tidigare forskning inom kvalitetsutveckling berör företags interna processer och aktiviteter. När man inom kvalitetsutveckling talar om kundorientering innebär det att företaget med interna medel ska arbeta för att möjliggöra så produkten eller tjänsten möter kundens specifikationer. När detta är uppnått har produkten eller tjänsten hög kvalitet. Företagen har här inga riktlinjer att följa när de ska leverera helhetslösningar som ska anpassas efter kundens aktiviteter och när en så tydlig kundrelation ska utvecklas. Det finns med andra ord ingen vägledning för vad som är kvalitet eller hur man möjliggör hög kvalitet på helhetslösningar. Den här avhandlingen visar vad som ingår i begreppet kvalitet när det gäller helhetslösningar (lösningskvalitet) samt hur företag kan möjliggöra det. Tre olika frågor har huvudsakligen behandlats. Den första frågan besvarar vad lösningskvalitet innehåller. Den andra berör hur företag med hjälp av åtgärder kan bidra till en förändring inom företaget för att möta de nya utmaningar som uppstår med att leverera helhetslösningar. Den tredje frågan berör på vilket sätt kunden kan involveras för att uppnå lösningskvalitet. För att besvara frågorna har ett antal studier baserade på empiriskt material genomförts, och fem artiklar har författats under forskningsprocessen. Artiklarna bidrar till att öka förståelsen för lösningskvalitet och hur företag kan arbeta för att uppnå det. Avhandlingens resultat visar att lösningskvalitet består av sju olika dimensioner: tillförlitlighet, kommunicerbarhet, intern överensstämmelse, empati, nåbarhet, påtaglighet, och anpassningsbarhet. Dessutom är kunskap om processer och kundrelationer två förutsättningar för att uppnå lösningskvalitet. Dimensionerna betraktas som riktmärken för lösningskvalitet som företag kan arbeta mot. Dimensionerna och förutsättningarna stöttas i sin tur av åtgärder som används för att bidra till den interna förändringen inom företaget. Resultaten visar dock att använda åtgärder inte alltid leder till en förändring. Endast noga utvalda åtgärder som relaterar till en specifik dimension möjliggör en förändring. Exempel på en möjlig åtgärd är kundinvolvering. Speciellt vid utveckling av helhetslösningar, betraktas kundinvolvering som en möjlig åtgärd för att stötta förutsättningarna till lösningskvalitet. Resultaten i den här avhandlingen bidrar huvudsakligen till en ökad kunskap om vad kvalitet är när det gäller helhetslösningar. Ytterligare ett bidrag är att föreslå kundens förändrade roll under utveckling och vid leverans av helhetslösningar för att uppnå lösningskvalitet.
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Wilson, Jenna. "Hope-Focused Solutions| A Relational Hope Focus of the Solution-Building Stages in Solution-Focused Brief Therapy." Thesis, Nova Southeastern University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3725579.
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The positive psychotherapy focused on for this study is Solution-Focused Brief Therapy (SFBT). Insoo Kim Berg and Yvonne Dolan (2001) once described the essence of Solution-Focused Brief Therapy (SFBT) as the “pragmatics of hope and respect” (p. 1) and despite Berg and Dolan’s declaration of hope’s importance in SFBT, little process research has been published looking at the “pragmatics” of hope in SFBT practice. Hope is seen as a common factor in psychotherapy since the human relationship, also known as the therapeutic alliance, is a foundation of psychotherapy. Hope plays a significant role in every human interaction and it is seen as a common factor in human relationships.
To begin to address this gap, a pilot study was conducted of an Insoo Kim Berg training recording, Irreconcilable Differences, in order to explore how she listened, selected and built hope in her work. Based on a SFBT technique focus, the preliminary results suggested Insoo Kim Berg builds hope relationally through the solution-building by working within the clients’ focus and their presenting problem. Four different yet interrelated hope phases in the SFBT solution building process were identified. To address this gap further, based on a SFBT stage focus, three cases by Insoo Kim Berg were analyzed in this study, Irreconcilable Differences, Over the Hump, and I’d Hear Laughter. The goal of this research was to demonstrate the how Berg listened, selected, and built hope with clients to validate her progression within and across the five SFBT solution-building stages, in all three cases through constant comparison, and to show how these findings are congruent with SFBT hopeful tenets. All with the intention of allowing the pragmatics of hope and respect to become more transparent for future SFBT practitioners.
Findings suggested building hope appears to be a relational process to building solutions and is co-constructed. Berg demonstrates how she embodies a hopeful stance throughout the duration of therapy. Results show how Berg builds hope within and across her progression of the solution-focused brief therapy solution-building stages, utilizing SFBT techniques and processes, which all align with the foundational SFBT tenets.
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Wilson, Jenna A. "Hope-Focused Solutions: A Relational Hope Focus of the Solution-Building Stages in Solution-Focused Brief Therapy." NSUWorks, 2015. http://nsuworks.nova.edu/shss_dft_etd/7.
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The positive psychotherapy focused on for this study is Solution-Focused Brief Therapy (SFBT). Insoo Kim Berg and Yvonne Dolan (2001) once described the essence of Solution-Focused Brief Therapy (SFBT) as the “pragmatics of hope and respect” (p. 1) and despite Berg and Dolan’s declaration of hope’s importance in SFBT, little process research has been published looking at the “pragmatics” of hope in SFBT practice. Hope is seen as a common factor in psychotherapy since the human relationship, also known as the therapeutic alliance, is a foundation of psychotherapy. Hope plays a significant role in every human interaction and it is seen as a common factor in human relationships.
To begin to address this gap, a pilot study was conducted of an Insoo Kim Berg training recording, Irreconcilable Differences, in order to explore how she listened, selected and built hope in her work. Based on a SFBT technique focus, the preliminary results suggested Insoo Kim Berg builds hope relationally through the solution-building by working within the clients’ focus and their presenting problem. Four different yet interrelated hope phases in the SFBT solution building process were identified. To address this gap further, based on a SFBT stage focus, three cases by Insoo Kim Berg were analyzed in this study, Irreconcilable Differences, Over the Hump, and I’d Hear Laughter. The goal of this research was to demonstrate the how Berg listened, selected, and built hope with clients to validate her progression within and across the five SFBT solution-building stages, in all three cases through constant comparison, and to show how these findings are congruent with SFBT hopeful tenets. All with the intention of allowing the pragmatics of hope and respect to become more transparent for future SFBT practitioners.
Findings suggested building hope appears to be a relational process to building solutions and is co-constructed. Berg demonstrates how she embodies a hopeful stance throughout the duration of therapy. Results show how Berg builds hope within and across her progression of the solution-focused brief therapy solution-building stages, utilizing SFBT techniques and processes, which all align with the foundational SFBT tenets.
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Galinier, Colette. "Dissolution et precipitation des solutions solides (ba, sr)so:(4) en solution aqueuse." Toulouse 3, 1988. http://www.theses.fr/1988TOU30091.
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Poullikkas, Andreas. "The Method of Fundamental Solutions for the solution of elliptic boundary value problems." Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/27141.
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We investigate the use of the Method of Fundamental Solutions (MFS) for the numerical solution of elliptic problems arising in engineering. In particular, we examine harmonic and biharmonic problems with boundary singularities, certain steady-state free boundary flow problems and inhomogeneous problems. The MFS can be viewed as an indirect boundary method with an auxiliary boundary. The solution is approximated by a linear combination of fundamental solutions of the governing equation which are expressed in terms of sources located outside the domain of the problem. The unknown coefficients in the linear combination of fundamental solutions and the location of the sources are determined so that the boundary conditions are satisfied in a least squares sense. The MFS shares the same advantages of the boundary methods over domain discretisation methods. Moreover, it is relatively easy to implement, it is adaptive in the sense that it takes into account sharp changes in the solution and/or in the geometry of the domain and it can easily incorporate complicated boundary conditions.
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Roos, Valentine. "Solutions variationnelles et solutions de viscosité de l'équation de Hamilton-Jacobi." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLED023/document.
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On étudie l'équation de Hamilton-Jacobi évolutive du premier ordre, couplée avec une donnée initiale lipschitzienne. Le but est de comparer les solutions de viscosité et les solutions variationnelles pour cette équation, deux notions de solutions faibles qui coïncident en dynamique hamiltonienne convexe. Pour travailler dans un cadre pertinent pour les deux types de solutions, on doit d’abord construire une solution variationnelle sans hypothèse de compacité sur la variété ou le hamiltonien étudiés. On retrace dans ce cas la construction historique des solutions variationnelles, en détaillant les propriétés de la famille génératrice obtenue par la méthode des géodésiques brisées. Il en découle des estimées permettant d’obtenir la solution de viscosité à partir de la solution variationnelle par un procédé d’itération. Après avoir vérifié que la solution variationnelle construite coïncide effectivement avec la solution de viscosité pour un Hamiltonien convexe, on caractérise les Hamiltoniens intégrables pour lesquels cette propriété persiste, en étudiant attentivement des exemples élémentaires en dimension 1 et 2We study the first order Hamilton-Jacobi equation associated with a Lipschitz initial condition. The purpose of this thesis is to compare two notions of weak solutions for this equation, namely the viscosity solution and the variational solution, that are known to coincide in convex Hamiltonian dynamics. In order to work in a relevant framework for both notions, we first need to build a variational solution without compactness assumption on the manifold or the Hamiltonian. To do so, we follow the historical construction, detailing properties of the generating family obtained via the broken geodesics method. Local estimates allow to prove that the viscosity solution can be obtained from the variational solution via an iterative process. We then check that this construction gives effectively the viscosity solution for a convex Hamiltonian, and characterize the integrable Hamiltonians for which this property persists by carefully studying elementary examples in dimension 1 and 2
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Blondeau, Valérie. "Pression oncotique des solutions de remplissage vasculaire." Paris 5, 1992. http://www.theses.fr/1992PA05P143.
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Bi, Gang. "Building services standard solutions implemented in CAD : design of ceiling void solutions." Thesis, University of Nottingham, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437096.
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Eriksson, Daniel. "Portable BizTalk solutions : Evaluating portable solutions to search for errors in BizTalkplatforms." Thesis, KTH, Skolan för datavetenskap och kommunikation (CSC), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142407.
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This report evaluates possible infrastructures to create portable BizTalk solutions. BizTalk is an integration based software mostly used at larger companies. Errors can occur in BizTalk and experts need an easy and portable solution to identify these. No such solution exists today, and this report focuses on how it could be performed. The results show that various tools need to be used to access information from BizTalk. Information about BizTalk must be protected by access rights, which are preferably controlled from a cloud portal. The cloud portal used in this project is Windows Azure, but other solutions have been considered. Azure has a specialized service to access secure locations, which other provider’s lack. Finally, a prototype application in Windows Phone 8 was developed. The solution has been shown to BizTalk experts, who were enthusiastic by the proposed solution and has proceeded with the project. They are currently analyzing what it would cost to develop a product and what could be charged for such a service.BizTalk Server är ett integrationsystem som underlättar integrering av olika system. Med hjälp av olika adaptrar kan BizTalk enkelt koppla samman tjänster som inte pratar på samma språk. Fel inträffar i BizTalk och experter behöver en smidig och portabel lösning för att identifiera dessa. Rapporten utvärderar olika infrastrukturer för att skapa mobila övervakningslösningar till BizTalk. Resultaten visar på att flera verktyg måste användas för att ansluta till BizTalk. Informationen som dessa vektyg kommer åt måste skyddas med rättigheter, som helst implementeras i molnet. Molnportalen som används i det här projektet är Windows Azure, men andra molnlösningar har också utvärderats. Azure har en tjänst som är specialiserad på att nå skyddaded nätverk bakom brandväggar, vilket andra leverantörer saknar. Slutligen utvecklades en prototyp i Windows Phone 8 för att demonstrera lösningen. Demonstrationen skedde inför BizTalk-experter, som var intresserade av lösningen och har valt att fortsätta projektet. De har tagit nästa steg i processen, som handlar om att analysera vad det skulle kosta att utveckla en komersiell produkt samt vad som skulle kunna tas betalt för en sådan produkt.
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Hossein, Mouhamad. "SOLUTIONS ENTIÈRES D'ÉQUATIONS HESSIENNES." Phd thesis, Université de Nice Sophia-Antipolis, 2009. http://tel.archives-ouvertes.fr/tel-00384432.
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Jardat, Marie. "Modélisation brownienne des solutions." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00169796.
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Les travaux de recherche que j'ai menés jusqu'à présent concernent les propriétés structurales et surtout dynamiques de solutions de particules, chargées ou non. Ils visent essentiellement à la modéli- sation de ces systèmes, en vue d'une meilleure compréhension des mécanismes « microscopiques » qui pilotent les propriétés macroscopiques mesurables. La méthode d'investigation choisie est une méthode de simulation numérique, appelée dynamique brownienne. Le principe de la simulation de dynamique brownienne est d'intégrer par une méthode itérative les équations du mouvement des particules de soluté d'un système, le solvant étant décrit comme un milieu continu, caractérisé par sa constante diélectrique et sa viscosité. La particularité de la méthode vient du fait qu'au niveau de description choisi, les particules ont des mouvements browniens, caractérisés par des équations sto- chastiques du mouvement. Deux types d'interactions sont à l'origine de la partie non aléatoire du mouvement :
• les interactions directes entre particules de soluté, telles que les interactions électrostatiques
dans le cas des ions et les forces répulsives à courte portée,
• les interactions indirectes entre particules, transmises par le solvant, appelées interactions hydrodynamiques, qui couplent les déplacements des particules (une particule en mouvement dans
le fluide l'entraine avec elle, ce qui perturbe les mouvements des particules voisines).
On déduit des trajectoires ainsi construites non seulement des informations moyennées sur l'ensemble du système, correspondant aux grandeurs accessibles à l'expérimentateur, mais aussi des informations locales, au niveau des particules.
Les travaux dont je présente les résultats illustrent la richesse du domaine d'application de la dynamique brownienne, ainsi que sa grande adaptabilité. J'ai commencé par consolider les fondements
de la méthode de simulation, en particulier en faisant le lien avec les méthodes théoriques utilisées pour étudier le transport dans les solutions d'électrolytes. J'ai ainsi calculé la conductivité électrique
de solutions aqueuses de sels simples et les coefficients de diffusion des ions dans ces solutions. J'ai ensuite développé les applications de la dynamique brownienne dans divers domaines, seule ou en collaboration avec des chercheurs du laboratoire ou extérieurs au laboratoire. On peut regrouper les travaux que j'ai effectués en trois thèmes :
• Le premier concerne la simulation d'électrolytes dissymétriques en charge et en taille. Pour les électrolytes peu dissymétriques tels que les sels de cryptate ou le tungstosilicate de sodium,
nous avons confirmé la validité de la méthode de simulation. Nous avons ensuite étudié non seulement les propriétés structurales et dynamiques d'électrolytes « modèles » 1-10, 1-20 et 2-20, mais aussi celles de solutions micellaires « réelles », pour lesquelles des déterminations expérimentales précises des coefficients de transport sont disponibles. L'intéret de la modélisation brownienne que nous avons menée pour ces systèmes très dissymétriques en taille et en charge est qu'elle prend en compte explicitement la présence des petits ions aux cotés des macroions. Nous montrons notamment que les interactions hydrodynamiques ont une grande
influence sur la diffusion des macroions.
• Le second thème est celui des électrolytes aux interfaces. J'ai notamment développé, en collaboration avec Christian Amatore (UMR PASTEUR de l'ENS) et un de ses étudiants en thèse,
Frédéric Grun, une modélisation et une méthode de simulation originales pour évaluer le temps de relaxation de la double couche électrochimique après un transfert d'électron. Ce travail est
un exemple pour lequel la simulation est utilisée comme un outil prédictif, permettant d'évaluer des grandeurs difficilement accessibles à l'expérimentateur. Je m'intéresse aussi dans le
cadre d'un PAI (Programme d'Action Intégrée) européen à la diffusion des électrolytes dans des matrices d'ions immobiles, en collaboration avec Vojko Vlachy, professeur à l'université de
Ljubljana. Enfin, la simulation brownienne a permis de calculer la distribution des contre-ions présents entre deux feuillets d'une argile compactée, mais relativement hydratée, et de faire le
lien avec la description microscopique de la dynamique moléculaire.
• Le dernier thème de recherche concerne les ferrofluides, qui sont des suspensions aqueuses stables de nanoparticules de maghémite. Le programme de simulation de dynamique brow- nienne a été adapté pour tenir compte des propriétés dipolaires des particules et une modélisation a été développée parallèlement à des travaux expérimentaux. Ce modèle permet notamment de rendre compte de l'anisotropie structurale observée expérimentalement en présence d'un champ magnétique extérieur.
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Erickson, Kristy M., and University of Lethbridge Faculty of Arts and Science. "Thermodynamics of aqueous solutions." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2007. http://hdl.handle.net/10133/529.
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Relative densities and relative massic heat capacities have been measured for aqueous solutions of triflic acid (CF3SO3H), sodium triflate (NaCF3SO3), gadolinium triflate (Gd(CF3SO3)3), dysprosium triflate (Dy(CF3SO3)3), neodymium triflate (Nd(CF3SO3)3), erbium triflate (Er(CF3SO3)3), ytterbium triflate (Yb(CF3SO3)3), and yttrium triflate (Y(CF3SO3)3) at T = (288.15, 298.15, 313.15, and 328.15) K and
p = 0.1 MPa. The resulting densities and massic heat capacities have been used to calculate out apparent molar volume and apparent molar heat capacity data for each of the investigated aqueous systems. The concentration dependencies of the apparent molar volumes and apparent molar heat capacities have been modeled using Pitzer-ion interaction equations. Single ion volumes and heat capacities have been calculated using estimates of the apparent molar properties at infinite dilution obtained from the Pitzer-ion interaction equations. These single ion values have, where possible, been compared with those previously reported in the literature.
Also, relative densities have been measured for aqueous solutions of CF3SO3H, Gd(CF3SO3)3, Nd(CF3SO3)3, and Yb(CF3SO3)3 at T = (323.15, 348.15, 373.15, and 423.15) K and p = (5.00, 10.00, and 15.00) MPa. The resulting densities have been used to calculate apparent molar volumes. The concentration dependences of these properties have also been modeled using Pitzer-ion interaction equations. The apparent molar volumes have been used to calculate single ion volumes which, in turn, have been compared with those previously reported in the literature.
This thesis also attempts to model the temperature, pressure, and concentration dependencies of the reported apparent molar properties of each system investigated using an equation of state commonly referred to as the density model. Where possible, the results of this model have been compared with those results from models previously reported in the literature.xiv, 148 leaves ; 29 cm.
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Petitt, David G. "Solutions for reliable multicasting." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1996. http://handle.dtic.mil/100.2/ADA319429.
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Thesis (M.S. in Information Technology Management) Naval Postgraduate School, September 1996.Thesis advisor(s): Rex Buddenberg, S. Sridhar. "September 1996." Includes bibliographical references (p. 121-125). Also available online.
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Houghton, S. M. "Localised solutions in magnetoconvection." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604258.
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Within the dark central umbra of sunspots we can observe localised bright convective features, called umbral dots. It is believed that sunspots, and therefore umbral dots, are formed by the interactions between convection and strong magnetic fields. Numerically, localised convective features have been observed in two-dimensional, and highly truncated three-dimensional, simulations of convection in the presence of an imposed magnetic field. The focus of this dissertation is to consider convection in the presence of a strong magnetic field, as present in the central umbra of a sunspot, to gain an understanding of the formation and structure of localised convective patterns. We begin with a brief survey of solar observational results and previous results from mathematical modelling of the system. We then reconsider the two-dimensional problem through the formation of discrete models that allow very large systems to be considered. Results from the discrete models agree well with results from the full system. In Chapter 3, the numerical methods used to model magnetoconvection are described and full details of the mathematical problem are given. A large study of compressible magnetoconvection in three dimensions is then completed and the results presented. To allow large domains to be investigated a Swift-Hohenberg type model for Boussinesq magnetoconvection is developed in Chapter 5. the thermal conductivity is allowed to vary with depth. This vertical variation breaks the up-down symmetry of Boussinesq convection and allows hexagonal patterns to form. It is found that while localised convective regions can be found in a reasonably generic way for the two-dimensional problem, they typically appear only as transients in the three-dimensional problem. Instead we find relatively weak convection patterns whose amplitude varies on a long length-scale. This is not inconsistent with the solar observations: umbral dots are observed to have a typical lifetime of fifteen minutes to two hours before they decay.
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Weiguo, Shen. "Thermodynamics of alkane solutions." Thesis, University of Canterbury. Chemical and Process Engineering, 1988. http://hdl.handle.net/10092/7727.
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An apparatus for static vapour pressure measurements on pure liquids and on binary and ternary mixtures containing one involatile component has been designed and constructed. The apparatus and corresponding experimental techniques have been tested and experimental errors have been discussed.
Measurements have been made of the vapour pressures of binary mixtures of n-hexane + n-hexadecane at 298.15 K and 303.15 K and of binary mixtures of n-hexane + n-octane, n-octane + n-hexadecane, and ternary mixtures of n-hexane + n-octane + n-hexadecane at 298.15 K.
The experimental measurements of pressures (P) vs mole fractions (x) have been fitted to the Redlich-Kister equation by Barker's method to obtain activity coefficients of each component in the liquid phase, the excess Gibbs functions, and the mole fractions in the vapour phase.
The results for n-hexane + n-hexadecane at 303.15 K have been compared with those of previous work (Williamson, 1957) and the agreement is reasonably good.
The excess volumes of n-hexane +benzene, n-dodecane + 2-methylpentane and pseudo n-dodecane prepared from equimolar numbers of n-decane + n-tetradecane + each of four branched hexane isomers at 298.15 K have been obtained from measurements of the densities of pure compounds and mixtures with a vibrating tube densimeter. Two methods for preparation of mixtures of which densities are required to be accurately measured have been designed and compared with each other.
The excess enthalpies of 2-methylpentane with n-dodecane and with each of three pseudo n-dodecanes prepared from equimolar mixtures of n-decane + n-tetradecane, n-undecane + n-tridecane, and n-octane + n-hexadecane, and the excess enthalpies of equimolar decane + tetradecane mixture with each of the other three branched hexane isomers at 298.15 K have been measured with an isothermal displacement calorimeter.
The experimental results of binary mixtures have been discussed in term of the principle of congruence with Hijmans' graphical method and Bellemans and Mat's analytical formula. New graphical tests of the principle of congruence and a modified Bellemans and Mat equation for ternary mixtures have been developed and applied to the experimental p-x data of ternary systems. The agreement between the experimental values and those predicted by the principle are excellent. The modified Bellemans and Mat equation seems to be more powerful than and preferable to the Redlich-Kister equation for the systems investigated in this work.
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Parenti, Stephanie. "Neocolonialism construction and solutions." Honors in the Major Thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/491.
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Many nation-states have their potential for growth hindered by the involvement of developed nations. These low-income nation-states are primarily located on the continent of Africa. There are three parts to this phenomenon of neocolonialism which is the process of continuing involvement of developed nations in developing nations that creates a negative growth in those nations. The research I've conducted is in three parts. The first consists of analyzing the social construction of neocolonialism, how the phenomenon occurs, and where it stems from. The second part is to show how this involvement is damaging to the developing nations. I will use examples such as the multinational corporation profit recycling, the life of foreign aid, and unwise economic deals. As it turns out the phenomena brings on the hindrance of developing in the low-income nation. The last part of my research is to come up with an economic improvement plan. For instance, rather than country A trading money (or some monetary value) for a resource in country B, "A" would build a school, hospital, or infrastructure in "B" to improve the conditions in the low-income nation. It is hypothesized that will leave room for growth in both nations without creating harmful economic repercussions because money would be taken out of the equation.B.A.
Bachelors
Sciences
Political Science
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Brisard, Anne Coiffard Laurence. "L'hyperhidrose traitements et solutions /." [S.l.] : [s.n.], 2005. http://theses.univ-nantes.fr/thesemed/PHbrisard.pdf.
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Tournier, Évelyne Della Dora Jean. "Solutions formelles d'équations différentielles." S.l. : Université Grenoble 1, 2008. http://tel.archives-ouvertes.fr/tel-00323706.
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Renger, Walter. "Limits of soliton solutions /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9823316.
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Vasquez, Paula Andrea. "Modeling wormlike micellar solutions." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 181 p, 2007. http://proquest.umi.com/pqdweb?did=1397906641&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
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Charlesworth, Mark Edwin. "Sustainable development : transdisciplinary solutions." Thesis, Keele University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545748.
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Maskell, Simon Richard. "Sequentially structured Bayesian solutions." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.615896.
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Rydin, Wiktoria, and Isabelle Andersson. "Logistic solutions Slovakia - Sweden." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41216.
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This report is a bachelor thesis project conducted by Isabelle Andersson and Wiktoria Rydin as a part of the education Mechanical Engineering, Industrial Economy and Production Management, at the School of Engineering, Jönköping University. The project is a collaboration with Hörle Wire Group AB, a company that produces round and flat-rolled wire of high-quality and they belong to one of Europe's leading suppliers of wire. The purpose of the bachelor theses was to review Hörle Wire's transport solutions from their facility in Nitra, Slovakia, to their two main customers in Sweden. Hörle Wire has a problem with gaining profitability regarding these transports. The cost of transporting the goods from Nitra to the customers is so high that the profit margin becomes very low. The problem was studied through qualitative and quantitative data collection in the form of interviews with staff at Hörle Wire and with their customers. The resulted in a clear picture of the emerging problem, and with the theories and facts studied in the field, proposals could be processed. Based on this, some suggestions for improvements were made that Hörle Wire could apply in its efforts to affect the transport. Some different proposals have been made, for example completely changing the means of transport, changing the appearance of today's transportation and to establish a warehouse.
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Rausch, de Traubenberg Michel. "Solutions fermioniques des supercordes." Université Louis Pasteur (Strasbourg) (1971-2008), 1990. http://www.theses.fr/1990STR13148.
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Nous nous sommes interesses aux cordes heterotiques, et tout particulierement a leur formulation fermionique. Nous proposons une premiere etape dans la classification des solutions fermioniques en mettant en evidence une equivalence, entre systemes modulaires invariants, des fermions reels, fermions complexes qui controlent le groupe de jauge. Ces familles de solutions caracterisees par la facon dont le groupe de jauge se reconstruit, nous permettent de faire apparatre une nouvelle construction de la solution supersymetrique e#8e#8 et une solution realiste avec trois familles de quarks et leptons et groupe de jauge e#6. Nous etudions aussi la propagation d'une corde sur une variete de groupe twiste, principalement dans le cas des modeles de wess-zumino-witten (wzw) fermionisables qui conduisent a une supersymetrie d'espace-temps n=1. Nous classifions l'ensemble des automorphismes internes et externes compatibles avec l'invariance modulaire et montrons leur correspondance avec leur realisation fermionique. Certaines des solutions wzw sont alors identifiees a des orbifolds. Nous mettons au point un programme en calcul formel qui nous permet, dans la formulation fermionique, de construire une solution a partir d'un ensemble de conditions aux limites pour les fermions
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Ingmar, Linnea. "Modelling Diversity of Solutions." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-400391.
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For many combinatorial problems, finding a single solution is not enough. This is clearly the case for multi-objective optimisation problems, as they have no single “best solution” and, thus, it is useful to find a representation of the non-dominated solutions (the Pareto frontier). However, it also applies to single objective optimisation problems, where one may be interested in finding several (close to) optimal solutions that illustrate some form of diversity. The same applies to satisfaction problems. This is because models usually idealise the problem in some way, and a diverse pool of solutions may provide a better choice with respect to considerations that are omitted or simplified in the model. This thesis describes a general framework for finding k diverse solutions to a combinatorial problem (be it satisfaction, single-objective or multi-objective), various approaches to solve problems in the framework, their implementations, and an experimental evaluation of their practicality.
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Khadse, Anil N. "Thermodynamics of polyelectrolyte solutions." Thesis, IIT Bombay, Mumbai, 2003. http://hdl.handle.net/10919/71547.
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Polymers having many ionizable groups in their molecular structure are called Polyelectrolytes. They are extensively used in industries like papermaking, food processing, medicine and pharmaceuticals, water purification, oil field exploration, cosmetic formulation etc. In spite of wide applicability its current status of knowledge is precursory due complexity of their behavior in solution as well as at interface. Solution properties of polyelectrolytes are extensively studied in last 40 years to understand their behavior. The activity is important thermodynamic property. From activity we can get most of thermodynamic properties like interaction parameter, free energy of dilution of the polyelectrolyte, degree of dissociation of polyelectrolytes etc.Several models of Polyelectrolytes thermodynamics have been proposed. Two general approaches have been used to model Polyelectrolytes thermodynamics, spherical and cylindrical (chain) models. Two of the successful models to explain and predict commonly measured properties of polyelectrolytes such as osmotic coefficient and counterion activity coefficients have been proposed by Manning and Oosawa. Most of these models are applicable at infinite dilution only may be due to weak inter chain interactions. An Excess Gibb’s free energy model can predict properties at finite concentrations of polyelectrolytes, which is combination of Manning model and Local composition model.Vapor pressure osmometry and isothermal Titration Microcalorimetry are experimental methods to determine the thermodynamic properties of polymer solvent system. Osmometry helps to understand the thermodynamics of polymer solutions as it determines the value of osmotic pressure, which in turn gives the value of thermodynamic parameters. Isothermal Titration Microcalorimetry gives the heat of dilution directly from which we can calculate activity of the solution.The osmotic coefficient and activity of water in aqueous NaPSS solution are found out using Vapor pressure osmometry and Isothermal titration calorimeter at different temperatures. The results are compared with result obtained by an excess Gibb’s free energy model. Measured data show good agreement with available literature data at that temperature.
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Sundqvist, Per. "Preconditioners and fundamental solutions." Licentiate thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-86132.
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New preconditioning techniques for the iterative solution of systems of equations arising from discretizations of partial differential equations are considered. Fundamental solutions, both of differential and difference operators, are used as kernels in discrete, truncated convolution operators. The intention is to approximate inverses of difference operators that arise when discretizing the differential equations. The approximate inverses are used as preconditioners. The technique using fundamental solutions of differential operators is applied to scalar problems in two dimensions, and grid independent convergence is obtained for a first order differential equation. The problem of computing fundamental solutions of difference operators is considered, and we propose a new algorithm. It can be used also when the symbol of the difference operator is not invertible everywhere, and it is applicable in two or more dimensions. Fundamental solutions of difference operators are used to construct preconditioners for non-linear systems of difference equations in two dimensions. Grid independent convergence is observed for two standard finite difference discretizations of the Euler equations in a non-axisymmetric duct.
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Nishida, Koji. "Structure of Polyelectrolyte Solutions." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150281.
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Howard, Christopher Anthony. "Metal-ammonia-fulleride solutions." Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1445641/.
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This project is the first concerted effort to study the structure of metal-ammonia- fulleride solutions. These novel solutions contain high concentrations of fulleride anions, C6on" (n = 1 to 5). A detailed understanding of the solubility of fullerenes and their derivatives has long been sought after: something this project addresses. The work focuses on the structure of the solutions using the complementary techniques of wide angle neutron diffraction, Small Angle Neutron Scattering (SANS), and Monte Carlo simulations. A highly developed structure is found over the short and intermediate length scales. The results show concentrated solutions of solvent separated, strongly coordinated, fulleride anions, maintained by an intriguing reorganisation of the ammonia solvent around the anions in solution. In more detail, we find two solvation shells around the C6o anions containing around 45 and -80 ammonia molecules respectively. The ammonia solvent molecules direct one of their hydrogen atoms towards the centre of the Ceo anions, allowing the other two hydrogen atoms to complete hydrogen-bonds within and across the shells. The solvation structure of the cation in solution is found to be very similar to its solvation structure in bulk metal-ammonia solutions. The structure and stability of the solutions is found to be dependent on both anionic charge and cation charge density. The scientific importance of the solutions is demonstrated by the attainment of high quality 13C NMR spectra for the fulleride anions Ceo"" {n = 1 to 5) for the first time in an identical solvent. Previous limitations of low concentrations, poor quality samples, and restrictions due to the air sensitivity of the anions have been overcome. The data here includes the first l3C NMR spectrum of C6o5". These data reveals that all the carbon atoms have an identical electronic environment in this anion.
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Chanty, François. "Apports osmotiques des solutions de nutrition parentérale pédiatrique." Paris 5, 1990. http://www.theses.fr/1990PA05P102.
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Akki, Rashi. "Morphological implications of phase transitions in polymer solutions : inferences from polyacrylonitrile-based solutions." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15783.
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Alzahrani, Abdulah. "Local travelling wave solutions and self-similar solutions for a green roof model." Thesis, Heriot-Watt University, 2014. http://hdl.handle.net/10399/2776.
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In this thesis we study travelling wave solutions and self-similar solutions for a green roof model and for some simpler models which are derived from that model. We focus on two limiting cases near a dry region and near a saturated region. We start by considering a convection model in the absence of diffusion and sink terms. We show that rarefaction waves and shock solutions exist for several cases. Next, we consider a convection-diffusion model where both the convective and diffusive terms are present and we show that travelling wave solutions and self-similar solutions exist for some cases. Moreover, numerical simulations are used for the travelling wave and self-similar solutions and confirm the analytic predictions. Finally, we consider the green roof model where all terms are present and we show that travelling wave solutions exist, whereas self-similar solutions are not found. We also show the travelling wave solutions exist for the two limiting cases.
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Liu, Weian, Yin Yang, and Gang Lu. "Viscosity solutions of fully nonlinear parabolic systems." Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2008/2621/.
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In this paper, we discuss the viscosity solutions of the weakly coupled systems of fully nonlinear second order degenerate parabolic equations and their Cauchy-Dirichlet problem. We prove the existence, uniqueness and continuity of viscosity solution by combining Perron's method with the technique of coupled solutions. The results here generalize those in [2] and [3].
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Sukhadia, Tejas. "Prediction of phase equilibria in solutions : an associative reformulation of thermodynamic theories of solutions." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/11886.
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Marquardt, Clinton J. G. "A comparison of solutions generated in incubated dreams to solutions generated in waking thought." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ26929.pdf.
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Marquardt, Clinton J. G. (Clinton James Gordon) 1969 Carleton University Dissertation Psychology. "A Comparison of solutions generated in incubated dreams to solutions generated in waking thought." Ottawa.:, 1996.
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