Дисертації з теми "Effetto StARC"
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Pozzo, Monica. "The effect of high-mass stars on low-mass star formation." Thesis, Keele University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366445.
Повний текст джерелаKünn, Steffen. "Unemployment and active labor market policy : new evidence on start-up subsidies, marginal employment and programs for youth unemployed." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/6271/.
Повний текст джерелаZur Verbesserung der Arbeitsmarktchancen arbeitsloser Personen und damit zur Bekämpfung von Arbeitslosigkeit werden innerhalb der Europäischen Union jedes Jahr beträchtliche Summen für Maßnahmen der aktiven Arbeitsmarktpolitik (AAP) aufgewendet. Vor diesem Hintergrund ergibt sich die Frage nach der Effektivität dieser Programme. Obwohl in den vergangenen Jahren zahlreiche empirische Evaluationsstudien durchgeführt und hierdurch wesentliche Erkenntnisse über die Wirksamkeit von AAP gewonnen wurden, bestehen noch stets unerforschte bzw. nur unzureichend erforschte Bereiche, wie zum Beispiel für innovative Programme oder für Untergruppen am Arbeitsmarkt. Hierin liegt der Beitrag der Dissertationsschrift. Am Beispiel von Deutschland werden neue Erkenntnisse zur Wirksamkeit der Existenzgründungsförderung, der geringfügigen Beschäftigung sowie der Programme für arbeitslose Jugendliche geliefert. Mit Einführung des Existenzgründungszuschusses (Ich-AG) im Rahmen der Hartz-Reformen, standen gründungswilligen Arbeitslosen, zusammen mit dem bereits seit Mitte der Achtziger Jahre bekannten Überbrückungsgeld, zwischen 2003 und 2006 zwei Förderprogramme zur Verfügung. Beide Programme umfassen eine monetäre Förderung während der Gründungsphase, um arbeitslosen Personen den Weg in die berufliche Selbständigkeit zu erleichtern. Die Analyse der beiden Programme zeigt deutlich, dass die intendierten Ziele, d.h. die Verbesserung der Beschäftigungschancen sowie der Einkommenssituation der Teilnehmer, erreicht wurden. Es zeigt sich weiter, dass beide Programme insbesondere effektiv für benachteiligte Gruppen am Arbeitsmarkt, wie z.B. Geringqualifizierte, sowie in Regionen mit eher schlechten ökonomischen Bedingungen sind. Aber auch die getrennte Analyse für Frauen zieht eine positive Bilanz. Hier erweist sich die Förderung als besonders wirksam, da die berufliche Selbständigkeit (im Gegensatz zur abh. Beschäftigung) anscheinend eine bessere Vereinbarkeit von Familie und Beruf ermöglicht. Abschließend lässt sich somit feststellen, dass die Förderung der beruflichen Selbständigkeit eine sinnvolle Strategie darstellt, da insbesondere bestehende Hürden für benachteiligte Gruppen am Arbeitsmarkt beseitigt und diese Personen langfristig in den Arbeitsmarkt integriert werden. Im nächsten Abschnitt der Dissertationsschrift wird die Aufnahme einer geringfügigen Beschäftigung während der Arbeitslosigkeit untersucht. In Deutschland können arbeitslose Personen bis zu 15 Stunden/Woche eine Beschäftigung aufnehmen, wobei ein Zuverdienst bis 165 Euro/Monat keine Auswirkung auf den Bezug von Arbeitslosengeld hat. Hierzu greifen arbeitslose Personen insbesondere auf die geringfügige Beschäftigung (genannt „Mini-Job“) zurück, da diese für die Arbeitslosen selbst abgabenfrei ist und Arbeitgeber nur einen reduzierten Beitrag zur Sozialversicherung sowie Einkommensteuer zahlen. Das erhöhte Einkommensniveau während der Arbeitslosigkeit sowie der enge Kontakt zum Arbeitsmarkt können unterschiedliche Wirkungen generieren. Es zeigt sich, dass die Aufnahme einer geringfügigen Beschäftigung grundsätzlich keinen signifikanten Einfluss auf die Arbeitslosigkeitsdauer hat, jedoch im Anschluss an die Arbeitslosigkeit zu längeren Beschäftigungsphasen führt. Die Untersuchung der Effektheterogenität zeigt, dass die geringfügige Beschäftigung während der Arbeitslosigkeit die Arbeitslosigkeitsdauer für Langzeitarbeitslose verkürzt und zu insgesamt stabileren Beschäftigungsphasen für diese Personengruppe führt. Das Ergebnis ist von hoher politischer Relevanz, da die Möglichkeit einer Zusatzbeschäftigung während der Arbeitslosigkeit anscheinend ein effektives Instrument zur Bekämpfung von Langzeitarbeitslosigkeit darstellt. Abschließend beschäftigt sich die Dissertationsschrift mit der Untersuchung der Effektivität von AAP zur Verbesserung der Arbeitsmarktchancen von arbeitslosen Jugendlichen. Jugendliche sind im Gegensatz zu Erwachsenen häufiger von Arbeitslosigkeit betroffen, da sie über geringere Such- bzw. Arbeitserfahrung verfügen. Die Bekämpfung von Jugendarbeitslosigkeit steht daher im Fokus der AAP. Vor diesem Hintergrund ist es erstaunlich, dass bisher nur wenig über die Wirksamkeit von AAP für arbeitslose Jugendliche bekannt ist bzw. für Deutschland hierzu noch überhaupt keine Erkenntnisse existieren. Die Dissertationsschrift liefert nun erstmalig Evidenz zur Wirksamkeit von AAP für arbeitslose Jugendliche in Deutschland. Die untersuchten Programme (außer Arbeitsbeschaffungsmaßnahmen) erhöhen die Beschäftigungswahrscheinlichkeit der Teilnehmer gegenüber den Nicht-Teilnehmern. Allerdings zeigt sich auch, dass arbeitslose Jugendliche ohne bzw. mit Hauptschulabschluss weniger von einer Programmteilnahme profitieren als Jugendliche mit einer höheren Schulbildung. Hier scheint noch Optimierungsbedarf zu bestehen, indem die Ausgestaltung der AAP stärker auf die Bedürfnisse von geringqualifizierten Jugendlichen eingehen sollte.
Thorburn, Patricia Jane. "Effect of non-starch hydrocolloids on starch processing." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423624.
Повний текст джерелаHansson, Annie. "Stark Spectroscopy, Lifetimes and Coherence Effects in Diatomic Molecular Systems." Doctoral thesis, Stockholm : Department of Physics, Stockholm University, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-650.
Повний текст джерелаRiz, Luca. "Spin polarization effects in neutron stars." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/253498.
Повний текст джерелаRiz, Luca. "Spin polarization effects in neutron stars." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/253498.
Повний текст джерелаWisniewski, John Patrick. "The effect of age and metallicity on Be circumstellar disk formation /." See Full Text at OhnioLINK ETD Center (Requires Adobe Acrobat Reader for viewing), 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=toledo1124412024.
Повний текст джерелаTypescript. "A dissertation [submitted] as partial fulfillment of the requirements of the Doctor of Philosophy degree in Physics." Bibliography: leaves 328-333.
Shamekh, Salem Sassi. "Effects of lipids, heating and enzymatic treatment on starches /." Espoo [Finland] : Technical Research Centre of Finland, 2002. http://www.vtt.fi/inf/pdf/publications/2002/P460.pdf.
Повний текст джерелаAltevogt, Torsten. "Der optische Start-Effekt mit quantisiertemStrahlungsfeld." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2000. http://dx.doi.org/10.18452/14465.
Повний текст джерелаThe theoretical description of spectroscopic experiments usu ally relies on a semiclassical approach where the matter system is described in terms of quantum mechanics while the radiation field is treated classically. This approach does n ot work well for systems with a strong coupling between the matter system and photons of the radiation field. The latter can be the case within an optical resonator.In this thesis, additional effects of a quantized radiation field are inves tigated on a pump-probe experiment for detecting the optical Stark effect. One significant effect is that the lineshape of the shifted resonance displays the photon statistics of the pump field. For small pump detuning probe gain results in a frequency regime where the semiclassical treatment predicts absorption. This effect is refered to nonclassical gain. For larger ensembles of two-level systems, additional substructures and resonances appear within the probe absorption spectrum. Also non- diagonal elements of the field density matrix can be detected in such an experiment. In order to describe a more complex matter systems, the optical Stark effect has been treated in terms of a density matrix approach with quantized radiation fields. For a quantitative description of nonclassical gain, higher correlation terms had to be treated properly. Moreover, conserved quantities were taken into account in approximate decouplings. The density matrix approach was applied to the description of the optical Stark effect on impurity-bound excitons in semiconductors. These systems are of high interest as their narrow resonances might allow the demonstration of fine effects of the quantized radiation field.
Coquard, Marie-Pierre. "Effet Stark dans les molécules tétraédriques." Dijon, 1994. http://www.theses.fr/1994DIJOS049.
Повний текст джерелаPuzeras, Eduardas. "Evolutionary effects in helium core burning star atmospheres." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2011. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2011~D_20111102_110919-19082.
Повний текст джерелаŠiuolaikiniai astronominiai stebėjimai leidžia įtarti, kad „standartinis“ žvaigždžių evoliucijos modelis yra nepilnas ir turi būti patikslintas, įvedant „papildomą“ maišymąsi. Disertacija yra skirta Galaktikos raudonosios sankaupos žvaigždžių cheminės sudėties tyrimui ir maišymosi procesų sukeltų cheminės sudėties pokyčių mažos masės žvaigždžių atmosferose tyrimui bei papildomo maišymosi teorinių modelių įvertinimui. Tam tikslui buvo gauti ir ištirti 62-jų Galaktikos raudonosios sankaupos žvaigždžių ir 9 padrikojo spiečiaus NGC 7789 žvaigždžių didelės skiriamosios gebos spektrai, nustatyti žvaigždžių pagrindiniai parametrai ir cheminė sudėtis. Tyrimas patvirtino hipotezę, kad Galaktikos sankaupos žvaigždės yra santykinai jauni Saulės metalingumo objektai, susiformavę per pastaruosius keletą milijardų metų. Tirtose žvaigždėse buvo įvertintos maišymosi procesų pasekmėje pasikeitusių anglies ir azoto gausų vertės. Pademonstruota, kad sankaupos žvaigždės gali būti išskirtos į skirtingas evoliucines grupes pagal 12C/13C kriterijų. Nustatyta, kad anglies izotopų santykių vertes Galaktikos sankaupos žvaigždžių atmosferose gerai aprašo šaltojo žemutinių sluoksnių papildomo maišymosi modelis, tuo tarpu termohalinio papildomo maišymosi modelis turi būti papildytas, kad sutaptų su visais stebėjimų rezultatais. Nustatyta, kad anglies izotopų santykiai spiečiaus žvaigždėse yra labiau paveikti maišymosi procesų nei numato dabartiniai teoriniai žvaigždžių evoliucijos modeliai.
Wainwright, C. L. "The effects of spin-orbit coupling on gravitational wave uncertainties." Pomona College, 2007. http://ccdl.libraries.claremont.edu/u?/stc,20.
Повний текст джерелаSommerville, Marion Don. "The effects of non-starch polysaccharides on the hydrolysis, gelatinisation and retrogradation of starch." Thesis, Glasgow Caledonian University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311801.
Повний текст джерелаSchmitt, Carmen. "Modifikation der spektralen Eigenschaften eines einzelnen Moleküls vor einer Oberfläche." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11380381.
Повний текст джерелаLhuissier, Jean-François. "Etude de raies d'argon ionisé élargies par effet Stark." Rouen, 1987. http://www.theses.fr/1987ROUES002.
Повний текст джерелаDonon, Jeremy. "Caractérisation de paires d’ions par spectroscopies IR, UV et rayons X, interprétées par calculs de chimie quantique." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS106.
Повний текст джерелаIon pairs are ubiquitous in nature, from sea water, aerosols, to living organisms. They influence the properties of concentrated ion solutions, and thus play a crucial role in various chemical reactions and biological processes. However, the characterization of ion pairs faces some difficulties: on one hand, several types of pairs coexist, and on the other hand, they are transient species in solution. In this context, this work presents several studies carried out according to three main research studies, backed by an original approach in the gas phase, and then in solution. Firstly, the effects of the electric field produced by the ion pair on the UV spectroscopy of a chromophore in gas phase (Stark effects) are studied. The ion groups can produce an electric field high enough to induce significant electronic Stark effects on a nearby UV chromophore. This study is conducted on model systems (C₆H₅-(CH₂)n-COO⁻,M⁺) with M = Li, Na, K, Rb, Cs and n = 1-3, allowing to vary the electric field experienced by the UV chromophore. These different systems are studied in the gas phase by UV spectroscopy combined with quantum chemistry calculations, as well as by conformation selective IR spectroscopy. Based on the analysis of the electronic Stark effects, precise conformational assignments can be proposed for electronic transitions separated by a few cm-1, without resorting to IR spectroscopy, or frequency calculations. The next study is focused mainly on understanding the environmental effects on ion pairs by microsolvation experiments in gas phase. The pair of sodium acetate ions [CH₃-COO⁻,Na⁺] is studied for the first time in a trimer complex with p-xylene by IR spectroscopy. Microhydration experiments are then carried out on charged ion pairs ([CH₃-COO⁻,M²⁺]; M = Ca, Ba), highlighting two different behaviours depending on the nature of the cation. The final research is to detect and identify the structures formed by the ions in electrolytic solutions by IR and RX spectroscopy. The first experiment is carried out on electrolytic solutions ([CH₃-COO⁻,M⁺]; M = Li, Na and K) by TF-IR spectroscopy by varying the ion concentration. A theoretical study is then carried out in order to propose a theoretical spectrum for each type of pair, and to confront them with experimental spectra in solution. The approach is based on the calculation of the IR signature of pairs ([CH₃-COO⁻,M⁺]; M = Li, Na, K, Rb and Cs) and free anion in solution, where the first solvation layer were described at the quantum level, followed by a solvent continuum. For each type of pair, spectroscopic families, consistent with the experimental data, are identified. This original approach paves way to the identification of supramolecular structures in electrolytic solutions. Finally, the first FZRET experiment in liquid micro-jet is carried out on a potassium acetate solution, providing access to a measurement of the distance distribution between cations and paired anions.In these studies, different methods are used ranging from experiment to theory, from the gas phase to solution. This work illustrates the need to combine several methods in order to obtain additional data and allow a better characterization of the supramolecular organisation of ions and their environment
Tananuwong, Kanitha. "Effect of gelatinization on starch-water interactions /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2004. http://uclibs.org/PID/11984.
Повний текст джерелаAltevogt, Torsten. "Der optische Stark-Effekt mit quantisiertem Strahlungsfeld." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=96172773X.
Повний текст джерелаMitchell, Angela. "The effect of temperature on starch synthesis." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243060.
Повний текст джерелаLynn, Andrew. "The effect of processing on starch granules." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/1503.
Повний текст джерелаWallwork, Meredith Anne Blesing. "Investigation of the physiological basis of malting quality of grain developing under high temperature conditions." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09PH/09phw215.pdf.
Повний текст джерелаUEHARA, VANESSA B. "Efeito da radiacao gama em properiedade da farinha de banana verde." reponame:Repositório Institucional do IPEN, 2011. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9950.
Повний текст джерелаMade available in DSpace on 2014-10-09T14:06:17Z (GMT). No. of bitstreams: 0
Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
Laurentin, Alexander. "Starch pyrodextrins : in vitro fermentation and physiological effects." Thesis, University of Glasgow, 2004. http://theses.gla.ac.uk/4917/.
Повний текст джерелаMoura, Ricardo Acioli. "The effect of physical aging, starch particle size, and starch oxidation on thermal-mechanical properties of poly(lactic acid)/starch composites." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/169.
Повний текст джерелаBaubock, Michael, and Michael Baubock. "Effects of Spin on Neutron-Star Observations." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621065.
Повний текст джерелаKhelfaoui, Fethi. "Modèles de profils Stark d'ions : multicharges dans les plasmas chauds." Aix-Marseille 1, 1991. http://www.theses.fr/1991AIX11358.
Повний текст джерелаGibb, Kevin. "The quantum confined Stark effect and Wannier Stark ladders in InxGa1-xAs quantum wells and superlattices." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7704.
Повний текст джерелаSanzharov, Maxim. "Spectroscopie rovibrationnelle de l'éthylène : Effet Stark : Application à l'éthylène dans les zéolithes." Phd thesis, Université de Bourgogne, 2010. http://tel.archives-ouvertes.fr/tel-00545878.
Повний текст джерелаRaballand, Wilfried. "Spectroscopie rovibrationnelle et Stark des molécules X2Y4 : application à l'éthylène." Dijon, 2005. http://www.theses.fr/2005DIJOS036.
Повний текст джерелаThis thesis is devoted to the spectroscopy of ethylene in the aim of studying the molecule trapped in zeolites. The first part deals with the tensorial model adapted to the symmetry of the isolated molecule: formalism, Hamiltonian and transition moments. To take the strong electric fields existing into zeolites into account, an extension of the model to the Stark effect is proposed in the second part. The third part describes the programs of the D2hTDS software which have been built for the calculation and analysis of X2Y4-type molecule spectra. The fourth part presents applications to the calculation and analysis of zero-field and Stark ethylene spectra. In particular, the model has been tested on the zero-field analysis of the ground state, the nu2 and nu12 bands. A weak field calculation of the nu7 band and a strong field simulation of the nu12 band have been performed, as well as a study of the alignment of the molecule as a function of the field
Saab, Mohamad Yehia. "Photochimie organique guidée par pulses laser : Applications : Benzopyrane et Pyrazine." Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20014/document.
Повний текст джерелаThe ring-opening photoisomerization of benzopyran, which occurs via a photochemical route involving a conical intersection,has been studied with quantum dynamics calculations using the multi-configuration time-dependent Hartree method (MCTDH). We introduce a mechanistic strategy to control the conversion of benzopyran to merocyanine with laser pulses. We use asix-dimensional model developed in a previous work for the potential energy surfaces (PES) based on an extension of thevibronic-coupling Hamiltonian model (diabatization method by ansatz), which depends on the most active degrees of freedom. The main objective of these quantum dynamics simulations is to provide a set of strategies that could help experimentalists tocontrol the photoreactivity vs. photostability ratio (selectivity). In this work we present:(i) a pump-dump technique used tocontrol the photostability, (ii) a two-step strategy to enhance the reactivity of the system: first, a pure vibrational excitation inthe electronic ground state that prepares the system and, second, an ultraviolet excitation that brings the system to the firstadiabatic electronic state; (iii) finally the effect of a non-resonant pulse (Stark effect) on the dynamics
Shukri, Radhiah. "Effects of amylose content and chemically cross-linking starch on in-vitro digestibility and extrusion of starch." Diss., Kansas State University, 2013. http://hdl.handle.net/2097/15636.
Повний текст джерелаDepartment of Grain Science and Industry
Yong Cheng Shi
This study focused on in-vitro digestibility and pasting properties of cross-linked (CL) starch with different amylose contents and different cross-linking levels, as well as physicochemical properties of extruded wheat flours with different amylose contents and functionality of amylopectin and cross-linking in improving the textural and physical properties of oat flour extrudates. Starch was CL by phosphorylation using a mixture of sodium trimetaphosphate and sodium tripolyphosphate at the ratio of 99:1 under alkaline condition. The digestibility of highly CL maize starches with different amylose contents was determined by Englyst, Available Carbohydrate Dietary Fiber and Association of Official Analytical Chemists (AOAC) Method 991.43 methods. CL waxy and normal maize starch granules swelled much more at higher temperatures, resulting in significantly lower total dietary fiber content than high-amylose maize starch. The alkali treatment study on low levels of cross-linking in starch affected the ratios of total bound phosphate esters which changed the degree of starch swelling, crytallinity and pasting properties of the CL starch. The study on the mechanism of the digestive enzymes and the extent of digestion during the incubation of CL wheat starch in AOAC Method 2009.01 showed progressive digestion after 16 h of incubation, which may not reflect in-vivo response in human. Extrusion of normal and waxy wheat flours resulted in the breakdown of starch and an increase in the insoluble protein, which affected the textural and structural properties of extrudate. High energy input played a major role in radial expansion of normal hard wheat extrudate, whereas higher amylopectin in soft waxy wheat flour was a dominant factor in determining the radial expansion when compared to normal soft wheat. Inclusion of soft waxy wheat in the oat flour formulations at 18% moisture content improved the textural and structural properties of extrudates. Low cross-linking level of CL waxy maize starch in oat flour formulation increased the void fraction and reduced the breaking strength of extrudates, whereas higher cross-linking levels of CL starches improved the resistant starch level on oat flour formulation but had very poor structural and textural properties.The study offers a good insight on the properties and digestibility of CL starch, as well as using low levels of CL starch to improve textural properties of nutritional extruded products. In addition, study on the extrusion of wheat flours with different amylose and protein contents provides knowledge on the influence of chemical compositions and energy input on the physico-chemical properties of extrudates.
Olsson, Erik. "Effects of Citric Acid on Starch-Based Barrier Coatings." Doctoral thesis, Karlstads universitet, Institutionen för ingenjörs- och kemivetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-27127.
Повний текст джерелаBaksidestext With growing environmental concerns, efforts are made to replace petroleum based materials with renewable alternatives such as starch. In this work, dispersions based on starch were used to produce coated papers which act as barrier against substances that can adversely affect the food quality such as water and oxygen. However, since starch is both a hydrophilic and hygroscopic material, this barrier material becomes problematic to use at high relative humidity. Citric acid was utilized as cross-linker for starch and it was found to reduce the moisture sorption, diffusion and swelling at high relative humidity. Both cross-linking and hydrolysis due to the low pH affected the barrier properties significantly, but in opposing directions. By controlling these two reactions it was possible to achieve reduced gas permeability. Starch nano-composites were produced by incorporating montmorillonite clay, to the barrier dispersion. It was seen that the suspension viscosity was reduced by poly(ethylene glycol) and citric acid adsorption on the clay. Also, a tendency for improved barrier properties with reduced aggregate volume fraction and reduced swelling was observed. It was also seen that up scaling this formulation to pilot scale was possible and promising results were achieved.
Renewable Functional Barriers
Akeel, Ali, and Manisha Gubhaju. "Digital marketing and its effects on Start-up business." Thesis, Högskolan i Gävle, Avdelningen för ekonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-35217.
Повний текст джерелаHaas, Helge. "Effet Stark quantique dans les puits de CdTe/CdZnTe et développement d'un dispositif photoréfractif." Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10146.
Повний текст джерелаLepine, Franck. "Imagerie de photoélectrons, sonde de la dynamique : des atomes ... aux adrégats." Lyon 1, 2003. http://tel.archives-ouvertes.fr/docs/00/04/69/40/PDF/tel-00006433.pdf.
Повний текст джерелаThis thesis concerns the study of the desexcitation of clusters and atoms by photoelectron imaging. The first part is interested in thermionic emission of a finite size system. A 3D-imaging set-up allows us to measure the time evolution of the kinetic energy spectrum of electrons emitted from different clusters (Wn-, Cn-, C60). Then we have a direct acces to the fundamental quantities which caracterize this statistical emission : the temperature of the finite heat bath and the decay rate. The second part concerns the ionization of atomic Rydberg states placed in a static electric field. We performed the first experiment of photoionization microscopy which allows to obtain a picture which is the macroscopic projection of the electronic wave function. Then we have acces to the detail of the photoionization and particularly to the quantum properties of the electron usually confined at the atomic scale
Lepine, Franck Bordas Christian. "Imagerie de photoélectrons, sonde de la dynamique des atomes ... aux adrégats /." [S.l.] : [s.n.], 2003. http://tel.archives-ouvertes.fr/docs/00/04/69/40/PDF/tel-00006433.pdf.
Повний текст джерелаFossati, L., S. E. Marcelja, D. Staab, P. E. Cubillos, K. France, C. A. Haswell, S. Ingrassia, et al. "The effect of ISM absorption on stellar activity measurements and its relevance for exoplanet studies." EDP SCIENCES S A, 2017. http://hdl.handle.net/10150/624504.
Повний текст джерелаNagai, Yasuko. "The effect of modified ADP-glucose pyrophosphorylase activity on starch metabolism In planta." Pullman, Wash. : Washington State University, 2008. http://www.dissertations.wsu.edu/Thesis/Fall2008/y_nagai_120108.pdf.
Повний текст джерелаTitle from PDF title page (viewed on Mar. 10, 2009). "Department of Molecular Plant Sciences." Includes bibliographical references.
Cury, Luiz Alberto. "Ressonâncias Stark e tunelamento em heteroestruturas semicondutoras." Universidade de São Paulo, 1987. http://www.teses.usp.br/teses/disponiveis/54/54131/tde-19052009-112933/.
Повний текст джерелаIn this work the quasi-bound and virtual levels of both electrons and holes are determined in the case of coupled AlxGa1-xAs-GaAs quantum wells in the presence of an external electric (Voltage) perpendicular to the layers. The heterostructures field of AlxGa1-xAs-GaAs are mimicked by a set of unidimensional quantum well potentials. We employ the envelope function approximation and solve the usual effective mass Schrödinger Equation. The electronic levels are then determined by using the exact solution of Schrödinger Eq. in terms of Airy functions into the wells and barriers and an Iteraction Matrix formalism with the Phase-shift method. Our results are in a good agreement with the experimental results of optical measurements. Motivated by the unusual properties of double-barriers devices we investigated the resonant tunneling of electrons through multi-barriers. The transmission Coefficient as a function of energy of the incident electron is determined by using an Interaction Matrix formalism. This method can be very useful in the interpretation of experimental results in semiconductor devices. We also calculate the tunneling current density as a function of applied voltage in the case of a double-barrier in order to interpret recent experimental results.
Durand-Noyer, Agnès. "Effet Stark de la molécule ICl : états pendulaires." Toulouse 3, 1995. http://www.theses.fr/1995TOU30294.
Повний текст джерелаPellerin, Stéphane. "Etude de la région cathodique d'un arc soufflé : déterminations des probabilités de transition et des élargissements Stark de raies d'argon II." Orléans, 1994. http://www.theses.fr/1994ORLE0053.
Повний текст джерелаFielding, Helen H. "The Stark effect in atomic and molecular Rydberg states." Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314877.
Повний текст джерелаOyman, Sena. "Cellular integrity : its effect on in-vitro starch digestion." Thesis, University of Nottingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440288.
Повний текст джерелаHuang, Xuan. "Monolithically integrated quantum confined stark effect tuned semiconductor lasers." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368167.
Повний текст джерелаYuh, Howard Yung-Hao. "The Motional Stark Effect diagnostic on Alcator C-Mod." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34976.
Повний текст джерелаThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 265-271).
A ten channel Motional Stark Effect diagnostic has been installed on Alcator C-Mod to measure the plasma internal magnetic pitch angle profile. The C-Mod MSE measures the local electric field direction by measuring the polarization angle of Balmer-[alpha] n=2) emission from a radially injected hydrogen Diagnostic Neutral Beam (50 keV, 5 A, 50 ms). The Lorentz electric field (EL = v ) and the magnetic field cause the nominally fully degenerate Balmer-[alpha] to split into a partially degenerate multiplet whose components are polarized relative to the local fields. Through careful spectral filtering, MSE measures the polarization angle of select multiplet components using a photoelastic modulator based polarimeter. Investigation of hydrogenic Balmer-[alpha] transitions in crossed E and B fields typical of MSE has led to the discovery of new features of the Stark-Zeeman Balmer-[alpha] multiplet. Three different transitions are found for this EB = ( ... ) configuration. In the regime where the Stark effect dominates over the Zeeman effect, transitions polarize parallel to E, B, or ... with ellipticity a function of the beam velocity. More important for MSE diagnostics is the discovery that multiplet lines (summed over degenerate transitions) will be observed to be orthogonally polarized only for statistical (i.e. equally) upper hybrid state populations.
(cont.) This contradicts the pure Stark case that is typically assumed for MSE, where Stark- lines are always observed to be orthogonal to Stark-[pi] lines. Non-statistical upper hybrid states populations are expected in certain situations including the propagation of beam neutrals through neutral gas, which is often used to calibrate MSE diagnostics in situ. Implementation of MSE on C-Mod required significant optical and optomechanical engineering. Satisfying MSE viewing geometry requirements for a radial beam on C-Mod resulted in an extended periscope inside the vacuum vessel. A successful design with robust performance against disruption accelerations, fatigue, creep, thermal stresses, and impact while being vacuum compatible has been developed for mounting the necessary polarization preserving optics. Full Stokes polarimeter modeling and calibration has been performed for the C-Mod MSE. An invessel apparatus has been constructed that is capable of generating pure, linearly polarized light absolutely aligned (to gravity) at arbitrary angles,circularly polarized light, as well as unpolarized light. This device has been used in situ to measure the MSE response to all possible Stokes vectors. Results have been compared to a Mueller matrix model of MSE including real geometry and one imperfect mirror with an arbitrary s&p phase shift and s&p reflectivity ratio.
(cont.) Geometric and optical properties of MSE have been deduced by matching measured responses with modeled responses. A method for concurrently measuring the PEM retardances has been developed as part of this effort. A complementary calibration technique using DNB injection into a gas-filled torus with known fields capable of measuring in situ optical Faraday rotation was also performed. Results show possible molecular deuterium contamination arising from the fill gas used in the calibration. MSE polarization measurements displayed discrepancies of over 20 with expected values from a vacuum field reconstruction. Motivated by spectral observations, an inclusion of Zeeman polarized D2 molecular emission reconciled measured and modeled values of the linear angle and polarization fraction. Observed on-linearities in angular response and the strong viewing geometry dependency are also reproduced in the model when Zeeman polarized D2 emission is included. Experiments testing this hypothesis are proposed. Pitch angle measurements in plasmas show that MSE has statistical uncertainties of 0.4 for all but the edge channel up to plasma densities of ne = 1.5 x 1020 m-3. This is insufficient to explain remaining discrepancies with magnetic reconstruction results at the plasma edge. While Faraday rotation and PEM retardance changes could play a role, these instrumental effects are also insufficient. Radial electric fields and beam induced charge exchange emission have been suggested as causes for errors in MSE measurements of plasma.
by Howard Yung-Hao Yuh.
Ph.D.
Grossarth, Kyle Louis. "The Effect of Lateral Spacing on the Spring Start." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2554.
Повний текст джерелаBerkowicz, Sharon. "Dynamic Stark Shaping of Molecular Fate." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260056.
Повний текст джерелаDen dynamiska (ac) Starkeffekten beskriver energiskiftet för elektroniska tillstånd som induceras av ett oscillerande elektriskt fält. Storleken på detta skift ökar med kvadraten av den elektriska fältstyrkan, det vill säga med ljusintensitet. Tillämpningen av denna fundamentala effekt i syfte att omforma molekylära potentialer, och därmed styra kemiska reaktioner, kallas för dynamisk Starkkontroll. Syftet med denna studie var att undersöka hur den dynamiska Starkeffekten påverkar den fotoinducerade dissociationen av molekylärt syre (O2) inom Schumann-Runge kontinuumet, SRC (130–175 nm). Absorption i SRC resulterar i dissociation via det så kallade B-tillståndet, som bildar O (1D) + O(3P), eller via J-tillståndet, som leder till bildandet av O(3P) + O(3P). Båda dessa dissociativa tillstånd har en karaktär som kan beskrivas som en blandning av ett valenstillstånd och ett Rydbergstillstånd. Simuleringar antyder att, till följd av valens- och Rydbergskaraktären hos B och J-tillståndet, leder dynamisk Starkskiftning av de kopplade Rydbergstillstånden till en dramatisk ändring i det relativa utbytet för de två dissociationskanalerna, samt till ett röd- skift av absorptionsspektrumet. Denna studie hade som ändamål att experimentellt testa denna teoretiska förutsägelse. En femtosekundslaser vid 400 nm användes som kombinerat excitations- och kontrollfält, vilket parallellt inducerar en trefoton-övergång in i SRC och ac Starkskiftar potentialerna. En detektionsmetod som mäter variationer i absorptionen för B-kanalen som funktion av pulsintensitet designades och implementerades. I den valda metoden detekteras emission vid 762 nm från O2(b − X)-övergången, vilket i sin tur ger en mätning av O(1D) som genereras från B- kanalen via en energiöverföringsreaktion. De experimentella resultaten stämmer relativt väl överens med simuleringarna. Den uppmätta emissionen vid 762 nm uppvisar ett intensitetsberoende som i stora drag reflekterar ac Stark- skiftningen av potentialerna. Utöver detta finns dock ett stort bidrag från mättnad, vilket försvårar tolkningen av datan. Vi-dare avviker den experimentella datan betydligt vid höga pulsintensiteter, vilket sannolikt tyder på att O(1D) även genereras genom absorption till högre exciterade tillstånd. Slutligen ob-serveras mindre, men tydliga avvikelser vid låga pulsintensiteter. Dessa kan möjligen tillordnas vibrationsresonanser med högre Rydbergstillstånd genom fyrfoton-absorption.
Mondet, Guillaume. "Propriétés radiatives des plasmas de fusion. Emissivité et opacité dans des structures atomiques complexes." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00946767.
Повний текст джерелаDupont, Jean-Marc. "Effet Stark dynamique sous champ intense application à l'interaction laser/molécule." Dijon, 1998. http://www.theses.fr/1998DIJOS034.
Повний текст джерелаZalian-Rahatabad, Cyrus. "Étude de la pulsation des étoiles de type RR Lyrae et de l’effet Blazhko." Thesis, Université Côte d'Azur (ComUE), 2016. http://www.theses.fr/2016AZUR4074/document.
Повний текст джерелаIn this thesis we develop a new theory of the Blazhko effect. We also provide a theoretical justification to the following commonly observed facts: the light curve harmonics decrease; the asymetry of envelopes and sidelobes ; the synchronization of layers and the mode selection. The first part of this thesis is dedicated to the extensive study of a RR Lyrae star presenting the Blazhko effect: S Arae. Firstly, a rigorous definition of harmonic analysis applied to light curves is given. This work, which has never been undertaken in the asteroseismology field, up to now, allows a better interpretation of the usual results of photometric studies. We carry on with the presentation of a software that we have developed, dedicated to frequency analysis: PDM13. After that, we perform the usual analysis of the frequency spectrum of the light curve, which we complete we two rigorous demonstrations of commonly observed facts: the harmonics decrease and the asymmetry induced by modulation. We complete it with a study of the parameters which vary during a Blazhko cycle, on which we will capitalize to understand this modulation effect. The second part begins with a reminder of the basic perturbed and linearized equations of stellar pulsation together with the oscillation mechanisms. We pursue this presentation with a non linear and discrete formalism that we have developed for these equations. This formalism will allow us to underline the importance of synchronization in those stars, but, most of all, it will lead us to a new theory of the Blazhko effect, based on solitons, which will be supported by a new results obtained with the wavelet transform method