Дисертації з теми "Phase Angles"
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Cosby, Michael C. "Effects of support grid vane angles on single phase heat transfer within rod bundle subchannels." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1202419092/.
Повний текст джерелаAllgeuer, Philipp [Verfasser]. "Analytic Bipedal Walking with Fused Angles and Corrective Actions in the Tilt Phase Space / Philipp Allgeuer." Bonn : Universitäts- und Landesbibliothek Bonn, 2020. http://d-nb.info/1224966252/34.
Повний текст джерелаKombo, Rainah. "Qualitative analysis of flow patterns : two-phase flow condensation at low mass fluxes and different inclination angles." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61303.
Повний текст джерелаDissertation (MSc)--University of Pretoria, 2016.
Mechanical and Aeronautical Engineering
MSc
Unrestricted
Saurel, Damien. "Etude de la séparation de phase magnétique dans les manganites à effet CMR par diffusion de neutrons aux petits angles." Phd thesis, Université de Caen, 2005. http://tel.archives-ouvertes.fr/tel-00086550.
Повний текст джерелаCes systèmes montrent une séparation de phase à grande échelle entre une phase ferromagnétique isolante (FI) et une phase antiferromagnétique isolante (AFI) correspondant à deux phases cristallines distinctes. Ils se transforment en une troisième phase cristalline, ferromagnétique métallique (FM), sous l?effet du champ magnétique. Nous avons tenté de comprendre par quel mécanisme.
Nous avons mis en évidence l?existence d?inhomogénéités magnétiques nanométriques dans chacune des phases FI et AFI. Notre étude sous champ révèle l?apparition d?un fort signal de diffusion dû à une nucléation de clusters de phase FM mésoscopiques (quelques centaines de nanomètres) lors de la transition I-M induite par le champ, faisant ainsi disparaître la diffusion par les objets nanométriques. L?effet CMR n?est donc pas dû à une nucléation à l?échelle nanométrique mais mésoscopique.
Lopian, Tobias. "Characterization of a metal-extracting water-poor microemulsion." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT206/document.
Повний текст джерелаRecycling of rare earths from electronic waste has still not found a significant industrial realization. One reason is the lack of optimized separation procedures due to poor fundamental knowledge on these systems. Due to the chemical and physical similarities of these metals, designing an efficient, adaptive and predictive formulation is still out of scope of possibilities. The supramolecular interpretation of complex-formation in the organic phase has gained an increasing importance in the last years. It is the most promising approach allowing the explanation of diverse phenomena, such as third phase formation and strong signals in small scattering experiments and to revert to methods well known from surfactant science. Our contribution towards a more complete understanding in this matter is the analysis of the electrodynamic behaviour of such phases and the correlation of these findings with the results of self-assembly properties and mass transport in these media.For this study, we specifically designed a reference model, breaking an extraction process down to its four fundamental components: The extractant before extraction (Di-(2-ethylhexyl)phosphoric acid, HDEHP), the extractant after extraction (its sodium salt, NaDEHP), toluene as apolar diluent and water. A Gibbs phase prism has been prepared (illustrated in Figure 1), where the z-axis gives the ratio of HDEHP to NaDEHP, representing the development of an extraction. Covering the low frequency-domain, impedance spectroscopy has been the method of choice in order to determine the frequency-dependent conductivity. Using dielectric relaxation spectroscopy, we reveal fast dynamic processes at high frequencies. Combined SAXS and SANS measurements have been performed to compare the electrodynamic trends with aggregation properties and intercluster interactions.Two phenomena have been identified to be responsible for the conductivity profile in reverse micellar systems: the formation of charged aggregates through dismutation and percolation. Throughout the reference system, these two processes have been probed as function of three variables: total extractant concentration, the water-to-surfactant ratio and the Na:H-ratio. As a major result, water plays a significant role in both processes. In case of percolation, reverse aggregates are not able to merge in the absence of water. Therefore, electrical conductivity is prohibited. In dilute systems, water facilitates the dismutation–process leading to an increase in conductivity
Impéror-Clerc, Marianne. "Étude de transition de phase vers les phases cubiques des systèmes eau/surfactant." Paris 11, 1992. https://tel.archives-ouvertes.fr/tel-01989797.
Повний текст джерелаFay, Hélène. "Films Lubrifiants Supramoléculaires Organisés : de la Microstructure aux Propriétés Tribologiques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2011. http://tel.archives-ouvertes.fr/tel-00715178.
Повний текст джерелаHéraut-Chéliout, Fawzia. "Rôle des trois chefs du triceps sural et du peroneus longus sur les angles tibio-calcanéen et de voûte plantaire externe pendant la phase d'appui de la marche humaine." Paris 11, 1987. http://www.theses.fr/1987PA112425.
Повний текст джерелаKurtisovski, Erol. "Relation structure-propriétés dans les bicouches gonflées de phases lamellaires." Paris 6, 2007. http://www.theses.fr/2007PA066229.
Повний текст джерелаHéraut-Chéliout, Fawzia. "Rôle des 3 chefs du triceps sural et du Peroneus longus sur les angles tibio-calcanéen et de voûte plantaire externe pendant la phase d'appui de la marche humaine." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376058928.
Повний текст джерелаChirat, Mathieu. "Synthèse de nouveaux tensioactifs macromoléculaires complexants et étude de leurs interactions avec le cobalt pour le développement d’un procédé de décontamination des textiles en milieu CO2 dense." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2012. http://www.theses.fr/2012ENCM0018/document.
Повний текст джерелаThis study is about textile decontamination in dense CO2 (liquid CO2 or supercritical CO2). The study is carried out in the framework of decontamination of textile used in the nuclear industry. The dense CO2 offers an alternative to aqueous medium used in the current process which generates a huge quantity of contaminated aqueous effluent requiring a post-treatment. Cobalt is the targeted contamination and can be found as ionic species or particles. The cobalt extraction in dense CO2 is achieved with an additive : a complexing CO2-philic/CO2-phobic macromolecular surfactant. Several types of additives were synthesized by controlled free radical polymerization : gradient copolymers made with CO2-philic groups (silicone-based or fluorinated moieties) and CO2-phobic complexing groups (acetoacetoxy, diethylphosphonate or phosphonic acid moieties). The copolymer behavior in dense CO2 was determined by phase diagram measurements (cloud point method) and their self-assembly in dense CO2 was investigated by small angle neutron scattering. The fluorinated copolymers were found advantageous in terms of solubility. Nevertheless, the silicone-based copolymers showed solubilities which are compatible with the process, therefore they are a good alternative to avoid fluorinated compounds which are unwanted in the conditioning of nuclear wastes. The study of cobalt complexation by the copolymers (UV-vis spectroscopy and inductively coupled plasma-mass spectroscopy) established relations between the type of complexing group and the affinity with the cobalt. The solubility of copolymer-cobalt complexes in dense CO2 is similar to those of copolymers. Moreover, the self-assembly study of the complex revealed a low aggregation. Finally, the synthesized copolymers were used in particle or ionic decontamination processes. In the case of ionic decontamination process, a rate of 70% of decontamination was reached with the use of gradient copolymer poly(1,1,2,2-tetrahydroperfluorodecyle acrylate-covinylbenzylphosphonic diacid) which allowed the formation of water-in-CO2 microemulsion. The efficiency of the decontamination process was even improved up to 97% with the addition of pyridine in the process
Millot, Coraline. "Multi-scale characterization of deformation mechanisms of bulk polyamide 6 under tensile stretching below and above the glass transition." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0028/document.
Повний текст джерелаMechanical properties of bulk polyamide 6 (PA6) have been studied in relation to microscopic deformation mechanisms. By applying various thermal treatments, sets of samples with different semi-crystalline microstructures, namely various crystalline allotropic forms (denoted α, γ and β) and different values of the crystallinity index (from 24 to 35%) and of the long period of the lamellar stacks (from 7 to 12 nm), have been obtained, for two different molecular masses. Mechanical properties have been measured in the linear (viscoelastic) and nonlinear (plastic) regimes below and above the glass transition of the amorphous phase (Tg). Differences of behavior have been observed depending on the microstructure. While the crystallinity index seems to be the predominant factor affecting the mechanical behavior above Tg, other structural parameters such as the crystalline form and the lamellar morphology (thickness and aspect ratio) have to be taken into account below Tg. Deformations at the scales of lamellar stacks and of the crystalline unit cell have been characterized by small and wide angle X-ray scattering (SAXS and WAXS) performed in-situ during tensile tests. In samples with predominantly β phase, lamellae tend to orient perpendicular to the tensile direction (TD). This orientation mechanism (which we denote as ‘Chain Network model’) is driven by the amorphous chains which transmit the stress between adjacent lamellae. The tensile strain in lamellar stacks perpendicular to TD is lower than the macroscopic tensile strain, which must be compensated by increased shear in inclined stacks. Also, at high extension ratios, the β phase transforms into α phase. In samples with predominantly α phase and above Tg, morphology changes are more complex. In a first step, chains orient perpendicular to TD, which implies that lamellar planes tend to orient parallel to TD, possibly due to their high aspect ratio (denoted as ‘Rigid Lamella’ model). In a second step, beyond the yield, a major fraction of crystallites then reorients normal to TD, i.e. chains themselves become parallel to TD, while a minor fraction remains oriented along TD. A highly oriented fibrillar morphology is ultimately obtained in all cases
Zhang, Li. "The study of phase separation in the miscibility gap and ion specific effects on the aggregation of soft matter system." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS106/document.
Повний текст джерелаPhase separation process is important as it determines the structure of the final materials. There are many systems that have more than one phase such as foams and gels. Aqueous foams are dispersions of gas bubbles in a water phase and gels appear when some basic microscopic unit starts to aggregate forming a large solid network that spans macroscopic space. They have many applications in industry and daily life. In the present thesis, firstly, I focus on studying different types of phase separation. Secondly, I studied the ion specific effects on the aggregation of colloidal particles and surfactant, the purpose is to make stable foams. In the miscibility gap there are two types of phase separation: Nucleation growth and spinodal decomposition, they have different growth mechanisms and kinetics. Therefore, my first p project is to investigate the evolution process of them and their effects to the final structure of material. Gels can be made by adding salt to the dispersion of colloidal particles, they have a large number of applications such as in food and material science. In this dissertation, we use different types of salts to compare gel properties from both macroscopic and microscopic aspects. Obtaining stable foams is significant in the view of their plenty of applications, but the ways to make them are mostly complicated. In this thesis, we can obtain stable foams via two ways. One is simply by adding salts to surfactant solutions, through which we can make ultrastable foam. Another way is using the gel phase we have studied as the continuous phase in foams to arrest the foam aging
Gallois, Charlotte. "Etude des propriétés physico-chimiques de suspensions de boehmite. Application aux supports catalytiques." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066553/document.
Повний текст джерелаIn the catalyst supports industry, one important step of alumina powder production is the spray-drying of boehmite suspensions. This aluminium oxyhydroxyde is often used as precursor for various types of alumina catalyst supports. Boehmite is composed of anisotropic particles bearing an electric charge. In the past decade, it has been shown that the properties of the dry powder depend not only on the drying conditions but on physico-chemical properties of the sprayed suspensions. For instance, different grains morphologies (doughnut-shaped grains, hollow spheres,…) as well as various dry grains properties (textural properties, mechanical resistance,…) may be obtained by tuning the physico-chemical properties of the suspension.This study focus on the understanding of the links between the physico-chemical properties of suspensions of two industrial boehmites and the characteristics of the final dry grain. Since these two boehmites were not well-known, the first step of the study was to characterize boehmite particles present in suspension thanks to a multi-technical approach. A rheological study was performed on boehmite suspensions obtained thanks to osmotic stress to build precisely the phase diagrams of the both boehmites according to the system of ionic strength vs. volume fraction. Small angle X ray scattering and dynamic light scattering were used to investigate the existence of an orientational order of boehmite particles in suspension. Finally, drying experiments of boehmite suspensions were conducted on an optical set-up and on fast micro-tomography X, to examine the impact of both concentration and ionic strength on the evolution of the droplet during drying
Magozore, Caxton. "DSP phase angle controlled three phase to single phase uninterruptible power supply." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5177.
Повний текст джерелаMaamache, Mustapha. "Phase de berry, angle de annay et etats coherents action angle." Nice, 1993. http://www.theses.fr/1993NICE4625.
Повний текст джерелаAlps, Mike. "The phase transformation friction angle of sand." abstract and full text PDF (free order & download UNR users only), 2007. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1442864.
Повний текст джерелаLeibly, Frank J. (Frank Joseph). "Measurement and digitization of phase angle modulated sensor data." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/37753.
Повний текст джерелаEaton, Elizabeth Jane. "Paradoxical breathing and arousal from sleep." Thesis, Manchester Metropolitan University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320131.
Повний текст джерелаMorris, Darryl William Seymour. "Low angle protein phasing." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341631.
Повний текст джерелаEllgardt, Anders. "Wide-angle scanning wide-band phased array antennas." Doctoral thesis, KTH, Elektroteknisk teori och konstruktion, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10225.
Повний текст джерелаQC 20100712
Sadler, Peter Andrew. "Harmonic elimination and voltage control in three phase AC power converters." Thesis, Manchester Metropolitan University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285285.
Повний текст джерелаByrd, Mark Steven. "Representations of SU(3) and geometric phases for three-state systems /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.
Повний текст джерелаAllison, Steven David. "The effects of interblade phase angle on pitch oscillating, transonic, cascade flows." Thesis, University of Salford, 2011. http://usir.salford.ac.uk/26530/.
Повний текст джерелаCocquerelle, Jean-Louis. "Étude des associations en triphasé : gradateur en angle de phase - transformateur - résistances." Lille 1, 1985. http://www.theses.fr/1985LIL10107.
Повний текст джерелаMarais, Sarel Jacobus. "The quadrifilar helix antenna and its application to wide angle phase-steered arrays." Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/21675.
Повний текст джерелаENGLISH ABSTRACT: The quadrifilar helix antenna has frequently been employed to provide the wide angle, circularly polarized radiation pattern which is preferable for mobile satellite communications. A detailed study of this antenna and its varieties is presented. When used as an element in wide angle scanning arrays for aeronautical satellite tracking applications, the additional requirement of a low profile with light weight applies. This further complicates the realization of good circular polarization close to the horizon. A top disk is incorporated into various antenna structures in an effort to improve the radiation performance when used within a closely spaced array while reducing the height of the radiating element. The array performance of these elements are investigated which hints at a supported traveling mode aiding the ability to accomplish the wide angle beam steering. Subsequent study of leakywave antennas initiated the study and implementation of leaky-wave structures in phased arrays of quadrifilar helix elements.
AFRIKAANSE OPSOMMING: Die vierledige heliksantenna word dikwels gebruik vir toepassings wat ’n wye, sirkulêr gepolariseerde stralingspatroon benodig. ’n Verskeidenheid van hierdie antennas is noukeurig bestudeer en hul toepaslikheid vir mobiele sattelietkommunikasie ondersoek. Wanneer hierdie antennas in fase gestuurde skikkings gebruik word, word dit ook vereis dat die eenhede liggewig is met ’n lae profiel. Dit bemoeilik die verkryging van goeie sirkulêre polarisasie naby die horison aansienlik. In ’n poging om die wyehoek straling met kort antennas te verbeter, is ’n oorhoofse skyf tot verskillende heliksstrukture toegevoeg. In nou gespasieerde skikkings maak hierdie skywe ’n positiewe bydrae to wyehoekstralingeienskappe. Die invloed van lekmodusse wat binne die struktuur voortplant is ondersoek en gebruik in skikkings waarvan die bundel naby aan die horison gestuur word.
Swann, Joshua Michael George. "Characterising pH response in phase separated hydrogels using small angle X-ray scattering." Thesis, University of Sheffield, 2010. http://etheses.whiterose.ac.uk/14968/.
Повний текст джерелаSchmidt, Nico [Verfasser]. "Phase transformation behaviour of polylactide probed by small angle light scattering / Nico Schmidt." Paderborn : Universitätsbibliothek, 2020. http://d-nb.info/1209601370/34.
Повний текст джерелаCollins, Edward Randolph Jr. "Torque and speed control of single-phase induction motors using an adjustable amplitude and phase angle auxiliary winding power supply." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/15472.
Повний текст джерелаAl-Tameemi, Wameedh Turki Mohammad. "Two-phase flow in straight pipes and across 90 degrees sharp-angled mitre elbows." Thesis, University of Sheffield, 2018. http://etheses.whiterose.ac.uk/20832/.
Повний текст джерелаSpiess, Rachel. "La phrase clivée en it- en anglais contemporain." Aix-Marseille 1, 2002. http://www.theses.fr/2002AIX10094.
Повний текст джерелаChavan, Harshad S. "Investigation of ß-phase poly (vinylidene fluoride) films using small-angle x-ray scattering." Cincinnati, Ohio : University of Cincinnati, 2006. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1145990710.
Повний текст джерелаPolavieja, Gonzalo Garcia de. "Geometric phase and angle for noncyclic adiabatic change, revivals and measures of quantal instability." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325986.
Повний текст джерелаCHAVAN, HARSHAD S. "INVESTIGATION OF β-PHASE POLY (VINYLIDENE FLUORIDE) FILMS USING SMALL- ANGLE X-RAY SCATTERING". University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1145990710.
Повний текст джерелаHarada, Tamotsu. "Ultra-Small-Angle Scattering Study of Formation Mechanism and Phase Transition of Colloidal Crystals." Kyoto University, 2001. http://hdl.handle.net/2433/150664.
Повний текст джерелаMcCann, John Forrest. "On the design of large bandwidth arrays of slot elements with wide scan angle capabilities." Connect to resource, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1209590321.
Повний текст джерелаXia, Tao. "Frequency Monitoring Network (FNET) Algorithm Improvements and Application Development." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/77296.
Повний текст джерелаPh. D.
Sédiri, Ammar. "Temps, aspect-phase et modalisation en anglais et en arabe : analyse contrastive métaopérationnelle." Paris 3, 1994. http://www.theses.fr/1994PA030117.
Повний текст джерелаThis thesis is a metaoperational approach to tense, aspect and modality in arabic and english through an application of the theory of phases to english and arabic verbal systems concerning these issues. The first chapter introduces both the language and the model of analysis of the arabic verbal system. Then a comparison with english is conducted in the third chapter. The fourth chapter deals with english and arabic utterances with an auxiliary component. The final chapter concerns modalization : a contrastive analysis of some english and arabic modal operators. The aim of the metaoperational grammar is to bring to light the systematic workinf og particular tonguesand the universals of human language
Thakkar, Kairavee K. "A Geometric Analysis of Time Varying Electroencephalogram Vectors." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1613745734396658.
Повний текст джерелаUriarte, Fabian. "Modeling, Detection, and Localization of High-Impedance Faults In Low-Voltage Distribution Feeders." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/30810.
Повний текст джерелаMaster of Science
Dowsett, Amy. "The improvement of vehicle noise variability through the understanding of phase angle and NVH analysis methods." Thesis, Loughborough University, 2018. https://dspace.lboro.ac.uk/2134/35880.
Повний текст джерелаBucher, Thomas M. Jr. "CAPILLARITY AND TWO-PHASE FLUID TRANSPORT IN MEDIA WITH FIBERS OF DISSIMILAR PROPERTIES." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3653.
Повний текст джерелаPontoni, Diego. "Small-angle X-ray scattering studies of phase transitions and growth processes on colloidal dispersions." Thesis, King's College London (University of London), 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271227.
Повний текст джерелаChedin, Georges. "Comparaison des syntagmes verbaux habituels et des locutions verbales en anglais américain avec l'usage en anglais britannique." Paris 4, 1988. http://www.theses.fr/1988PA040055.
Повний текст джерелаI first put together a corpus of about 600 phrasal and prepositional verbs, using Webster's new world dictionary, 1970, in which Mathews had marked americanisms with an asterix. I then devised a questionnaire and a method of investigation. In 1974, 1978, 1983 i went to the states, and in 1977, 79, 82, i went to Britain, to carry out a field survey on informants selected according to several socio-linguistic variables. Between 1974 and 1983 my corpus increased from 600 to 900 lexical items. The purpose of my field survey in the US was to assess the frequency, level, and usage in which the phrasal and prepositional verbs were used by informants, selected as representative of different categories (dialectal zone, age, sex, occupation, socio-economic and educational background). The field survey carried out in Britain with representative informants, selected according to the same socio-linguistic variables, was designed to evaluate the degree to which americanisms had entered into British speech and to underline differences in usage, and to elicit British equivalents. The results of this study show a high degree of assimilation with respect to certain americanisms as well as a reluctance on the part of British informants to use certain verbal idioms. As for the us, i was able to establish a correlation between the usage of a given verb and a given socio-linguistic variable. Finally, i compared my work with that of the lexicologists
Chakraborty, Saonti. "SHORT - RANGE ORDER IN THE NEMATIC PHASE OF REDUCED SYMMETRYTHERMOTROPIC MESOGENS." Kent State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=kent1385158954.
Повний текст джерелаMiftah, el kheir Laila. "Smart devices for biomedical applications." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD054.
Повний текст джерелаSmart Devices have been widely used by health care and cosmetics professionals. Indeed, they helpin many aspects of clinical practice by providing an efficient way for medical diagnosis, supportingbetter clinical decision-making and improving patient outcomes. In this thesis, we have beeninterested in three applications. The first one is related to the wettability measurement, especially forthe human skin. So we propose, a held-hand device that is based on the contact angle measurementto determine skin wettability. Besides, the device allows the visualization of the liquid dropletspreading in both dynamic and static modes. Moreover, it can measure the top and the left views ofthe droplet and provides the 3D droplet and the skin explored area profiles. The second applicationpermits the skin radiance measurement. For this purpose, we propose a miniaturized device havingan original method for the BRDF measurement associated with 3D profile measurement of the areastudied. As regards the third application, it is a non-invasive method for breath measurement that usesa stereovision system and a pseudo-periodic pattern. This system allows a high-resolution threedimensionaldisplacement measurement for the recording of the thoracoabdominal wall respiratorymovement. The devices developed during this research gives us a high accuracy, a good resolutionand repeatability of measurements
Boulonnais, Dominique. "Elements pour une definition de la notion de phrase, avec application a l'anglais." Paris 3, 1989. http://www.theses.fr/1989PA030116.
Повний текст джерелаThe present dissertation examines the legitimacy of the concept of sentence and its role in linguistic theory. A semantic definition is first constructed, based on a study of the scope of adverbial clauses, which points to the existence of different levels of organization in linguistic expressions. Sentences are described as the combination of a tropic, or sign of mood, and a phrastic, or propositional content, in a revised version of hare's 1970 work. Tense, defined so as to include all verbal forms, finite and non finite, in a symmetrical system, is given as the minimal syntactic equivalent of the tropic, and thus as the constitutive element of sentences. The notion of tense is also extended to small clauses. Non-sentential predicative structures, such as perception verb and suject or object complements, are examined in an attempt to distinguish them from verbal and non-verbal sentential forms. The structure and distribution of embedded sentences, divided into two groups of primary and derived forms, are then given a brief description. In conclusion, the specificity of sentences is demonstrated within the framework of x-bar theory
Oliveira, Pablo Gustavo de. "Ângulo de fase como indicador de desfechos negativos em pacientes cirúrgicos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61738.
Повний текст джерелаIntroduction: Electrical Bioimpedance (BIA) is an easy to use, fast, inexpensive, noninvasive and highly reproducible used to verify the changes in body composition. The Phase Angle (PA), obtained by BIA reflects the relative contribution of fluid and membranes for the human body, being associated as a prognostic marker in various clinical situations. Objectives: To evaluate the AF as an indicator of negative outcomes in surgical patients. Methodology: We studied patients aged 18 to 80 years at the Hospital de Clínicas de Porto Alegre with indication of elective surgery. Evaluations were performed at admission, 48 and 72 hours after surgery. Body weight, height and Body Mass Index (BMI), nutritional status by Subjective Global Assessment (SGA) and Phase Angle through the BIA. Results: According to BMI, 59.2% of patients were classified as eutrophic, 3.5% moderately malnourished and 37.3% had some degree obesity. The assessment by SGA found that 76.1% of patients were eutrophic, 23.2% moderately malnourished and 0.7% severely malnourished. The low values obtained for the AF in three evaluations were not presented as indicators of negative outcomes in surgical patients. Conclusions: AF is not an indicator to show negative outcomes in surgical patients.
Li, Biao. "Hydrophobic-Hydrophilic Separation Process for the Recovery of Ultrafine Particles." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/103278.
Повний текст джерелаDoctor of Philosophy
Recovery and dewatering of ultrafine particles have been the major challenges in the minerals and coal industries. Based on the thermodynamic advantage that oil droplets form contact angles about twice as large as those obtainable with air bubbles, a novel separation technology called the hydrophobic-hydrophilic separation (HHS) process was developed at Virginia Tech to address this issues. The research into the HHS process previously was only conducted on the recovery of ultrafine coal particles; also, the fundamental aspects of the HHS process were not fully understood, particularly the mechanisms of phase inversion of oil-in-water emulsions to water-in-oil emulsions. As a follow-up to the previous studies, emulsification tests have been conducted using ultrafine silica and chalcopyrite particles as emulsifiers, and the results showed that phase inversion requires high contact angles, high phase volumes, and high-shear agitation. These findings were applied to improve the HHS process for the recovery of ultrafine particles of coal, copper minerals, and rare earth minerals (REMs). The results obtained in the present work show that the HHS process can be used to efficiently recover and dewater fine particles without no lower particle size limits.
Clark, Matthew A. "The Harmonic Distortion Reduction of Phase-Angle Fired SCRs Feeding a Resistive Load using Fuzzy Logic." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1271111941.
Повний текст джерела