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1
Deppermann, Thomas. "Resonanzstruktur des Zerfalls D±s-]p+p-p± [D s pi pi pi]." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965231968.
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Götzen, Klaus. "Untersuchung des Zerfalls D+-s-]K+K-p+p-p+- [D s K K pi pi pi]." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969509898.
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Bencheikh, Bencherki. "Etude des résonances produites dans les réactions pi-p(pi#0 omega) n and pi-p(pi#0pi#0 omega) n at 100 gev." Chambéry, 1990. http://www.theses.fr/1990CHAMS013.
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Dans le cadre de la spectroscopie des mesons formes de quarks legers, on etudie les reactions pi-p(pi#0 omega) n, (pi#0pi#0 omega) n mesurees a 100 gev par l'experience na12 au cern. Apres une breve description de l'appareillage experimental, la selection des evenements pi#0 omega ainsi que la soustraction du bruit de fond sont appliquees. Le spectre de masse des evenements pi#0 omega selectionnes est domine par les mesons b#1 et rho#3. L'analyse a petit transfert d'impulsion a permis de mettre en evidence une resonance vers 2. 1 gev de nombres quantiques j#p#c=1##, i#g=1#+. Celle-ci est compatible avec les deux mesons-vecteurs attendus dans la region de 2 gev dans le cadre du modele des quarks. Une structure est aussi observee a grand transfert d'impulsion a 1. 6 gev. Celle-ci pourrait correspondre a l'excitation radiale du meson b#1 ou a l'etat 2## attendus tous les deux dans le modele des quarks. L'etude des evenements pi#0pi#0 omega selectionnes a permis de montrer clairement l'existence d'une structure a 1. 9 gev dans le spectre de masse du systeme (pi#0b#1). Celle-ci est tout a fait compatible avec les etats hybrides qqg predits par certains modeles bases sur qcd
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Denz, Holger. "Differential cross sections in p±p [pi ± p] scattering at low energies." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972028021.
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Masetti, Lucia. "Measurement of the K± -> p+p-e±v(-)e [K ± pi + pi - e + - (-) v e] form factors and of the pp [pi pi] scattering length a00." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981815189.
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Lang, Michael. "Aufbau des GDH-Experiments und Messung der Helizitätsabhängigkeit von [gamma]p-> pp+p- [gamma p p pi + pi-] von der Schwelle bis 800 MeV." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971983550.
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Stanislaus, Thanthirimudalige Don Shirvel. "A study of the reaction p+p-->p+p+[pi][superscript 0] from 320 MeV to 500 MeV." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/29429.
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The reaction p+p → p+p+π⁰ has been studied from threshold up to 500 MeV, by detecting the decay 7-rays of the π⁰ in coincidence in two large NaI crystals (TINA and MIN A). It was possible to measure the energy spectra, the differential cross sections and the asymmetry of the π⁰.
The total cross sections and the angular distribution parameter b (defined by [Formula Omitted] determined in this measurement are consistent with previous measurements, but are of a much higher precision. The value obtained for b is very small indicating that most of the π⁰ mesons are isotropically distributed in the centre of mass. Assuming the energy spectra predicted by Gell-Mann, we have deduced the intensities of the Ss, Ps and Pp transitions by a global fit to all the energy spectra and the resulting cross sections. For Ss we obtained [Formula Omitted] which is smaller and more accurate than the previous measurements. A model independent [Formula Omitted] would have an uncertainty of about 6 µb.
We have compared our results with those of the reaction n+p → N + N + π± and found them to be fairly similar. Any difference would demand inelasticities in the 1=0 channels, but the total cross sections indicate that σ₀₁ is small. The centre of mass pion energy spectra for pp → ppπ⁰ and np → nnπ⁺ are also similar. However a large cosΦ term is observed in the π± differential cross sections from the np reaction which is an indication of a significant value for σ₀₁.
The analysing powers are fairly large and negative. This is the first measurement
of this observable, although evidence from the reaction ¹³C(p, π⁻) had suggested that the asymmetry in the free pn → ppπ⁻ reaction might be positive.Science, Faculty of
Physics and Astronomy, Department of
Graduate
8
Hofman, Gertjan J. "[Pi]p analyzing powers from 87 to 269 MeV." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25069.pdf.
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Ricciardulli, Vittorio. "Analisi dello spettro di massa invariante j/psi pi+ pi- in collisioni p-p a sqrt(s) = 8 tev con il rivelatore cms." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6617/.
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In questo lavoro di tesi è stato studiato lo spettro di massa invariante del sistema J/psi pi+ pi-, m(J/psi pi+ pi-), in collisioni protone-protone a LHC, con energia nel centro di massa sqrt(s)) pari a 8 TeV, alla ricerca di nuovi stati adronici. Lo studio è stato effettuato su un campione di dati raccolti da CMS in tutto il 2012, corrispondente ad una luminosità integrata di 18.6 fb-1. Lo spettro di massa invariante m(J/psi pi+ pi-), è stato ricostruito selezionando gli eventi J/psi->mu+ mu- associati a due tracce cariche di segno opposto, assunte essere pioni, provenienti da uno stesso vertice di interazione. Nonostante l'alta statistica a disposizione e l'ampia regione di massa invariante tra 3.6 e 6.0 GeV/c^2 osservata, sono state individuate solo risonanze già note: la risonanza psi(2S) del charmonio, lo stato X(3872) ed una struttura più complessa nella regione attorno a 5 GeV/c^2, che è caratteristica della massa dei mesoni contenenti il quark beauty (mesoni B). Al fine di identificare la natura di tale struttura, è stato necessario ottenere un campione di eventi arricchito in adroni B. È stata effettuata una selezione basata sull'elevata lunghezza di decadimento, che riflette la caratteristica degli adroni B di avere una vita media relativamente lunga (ordine dei picosecondi) rispetto ad altri adroni. Dal campione così ripulito, è stato possibile distinguere tre sottostrutture nello spettro di massa invariante in esame: una a 5.36 GeV/c^2, identificata come i decadimenti B^0_s-> J/psi pi+ pi-, un'altra a 5.28 GeV/c^2 come i candidati B^0-> J/psi pi+ pi- e un'ultima allargata tra 5.1 e 5.2 GeV/c^2 data da effetti di riflessione degli scambi tra pioni e kaoni. Quest'ultima struttura è stata identificata come totalmente costituita di una combinazione di eventi B^0-> J/psi K+ pi- e B^0_s-> J/psi K+ K-.
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Michaud, Yonnel. "Etude phénoménologique de la réaction d'échange de charge (pi)-p -> (pi)[n à haute énergie]." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10097.
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La presente these est consacree a l'etude de la reaction d'echange de charge pion negatif proton donne pion nul neutron. Cette reaction fait partie des processus quasi-elastiques, caracterises par de petits moments transferes, et donc non interpretables par la chromodynamique quantique. Le modele de glauber, utilise avec succes dans le cadre de la diffusion elastique, est exploite ici pour l'etude de la reaction d'echange de charge. Une interaction effective entre quarks, incluant un terme central et un terme spinorbite, est employee afin de rendre compte de l'echange du meson rho. Les resultats obtenus permettent de conclure a la nature diffractive de la reaction etudiee, mais ne permettent pas de determiner avec precision les rayons moyens des densites de quarks interagissants
11
Striley, David L. "Large transverse momentum [pi]⁰ meson production by 0.5 TeV/c p, [pi]+ and K+ incident on beryllium /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9737874.
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Baier, Martin. "Synthese elongierter Diaza-p-Donor-Cavitäten [Diaza-pi-Donor-Cavitäten]." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974320226.
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Bauer, Andreas. "Spontaneous magnetic flux induced by ferromagnetic p-junctions [pi-junctions]." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974358290.
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Fets, Louise Victoria. "The role of PI(4,5)P₂ signalling in Dictyostelium chemotaxis." Thesis, University of Cambridge, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.609753.
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Yıldızhan, Şeref. "Kreuzkonjugierte p-Elektronensysteme [pi-Elektronensysteme] auf dem Weg zum Ur-Indigo /." [S.l.] : [s.n.], 2006. http://www.digibib.tu-bs.de/?docid=00011590.
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Axe, Elizabeth Louise. "DFCP1 : an atypical PI(3)P binding protein involved in autophagy." Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613924.
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Paes, Jose Tadeu de Souza. "Aplicação do modelo de Chou-Yang ao espalhamento elástico [pi] - p." [s.n.], 1985. http://repositorio.unicamp.br/jspui/handle/REPOSIP/278067.
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Orientador: Jose Bellandi FilhoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Fisica Gleb Wataghin
Made available in DSpace on 2018-07-15T00:18:26Z (GMT). No. of bitstreams: 1 Paes_JoseTadeudeSouza_M.pdf: 1210994 bytes, checksum: 4ab629269bccd716193e0df2c539f815 (MD5) Previous issue date: 1985
Resumo: Faz-se um estudo do espalhamento elástico p-p no intervalo de energia 5,15 £ Ös £ 19,3 GeV. Através de um ajuste dos dados experimentais da seção de choque elástica calcula-se, aplicando o modelo de Chou-Yang, o fator de forma e o raio quadrático médio do p- comparando-os com os dados experimentais
Abstract: p-p elastic differential scattering data, in the interval 5.15 £ Ös £ 19.3 GeV, have been analyzed using the model of Chou-Yang. From the adjusted experimental data to the calculated curve of the model, values of the form factor and average square radius of the negative pion have been obtained.
Mestrado
Física
Mestre em Física
18
Yang, Lixu. "Non-covalent interactions in solution." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8097.
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Non-covalent interactions taking place in solution are essential in chemical and biological systems. The solvent environment plays an important role in determining the geometry and stability of interactions. This thesis examines aromatic stacking interactions, alkyl-alkyl interactions, edge-to-face aromatic interactions, halogen bonds and hydrogen…hydrogen interactions in solution. Chapter 1 briefly introduces the different classes of non-covalent interactions, in addition to the state-of-the-art models and methods for investigating these weak interactions. The chapter finishes with a focus on dispersion interaction in alkanes and arenes. Chapter 2 investigates dispersion interactions between stacked aromatics in solution using a new class of complexes and thermodynamic double mutant cycles (DMCs). In extended aromatics, dispersion was detected as providing a small but significant contribution to the overall stacking free energies. Chapter 3 concerns the experimental measurement of alkyl-alkyl dispersion interactions in a wide range of solvents using Wilcox torsion balances. The contribution of dispersion interactions to alkyl-alkyl association was shown to be very small, with DMC, QSPR method and Hunter's solvation model. Chapter 4 studies edge-to-face aromatic interactions in series of solvents. In the open system, edge-to-face aromatic interactions were found to be sensitive to the solvent environment. The solvent effects were complicated and cannot be rationalised by a single parameter. Further analysis is needed. Chapter 5 describes a preliminary approach to investigate organic halogen…π interactions in solution using supramolecular complexes and torsion balances. Chapter 6 is a preliminary investigation of the ability of hydrogen atoms to act as H bond acceptors in silane compounds. Computations and 1H NMR demonstrated a weak interaction between silane and perfluoro-tert-butanol.
19
Schappel, Jörg. "Alternierende p-konjugierte [Pi-konjugierte] Blockcopolymere mit definierten Blocklängen Synthese und Charakterisierung /." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982146531.
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Mitchell, W. P. R. "p-Fold intersection points and their relation with #pi#'s(MU(n))." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377731.
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Kolp, Christopher Jay. "Investigations into cycloconjugation in heterocycles : is d-p [pi] overlap a factor /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487681148540852.
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Chai, Zhengwei. "Study of the N to Delta Transition via p({rvec e}, e'{rvec p}){pi}{sup 0} Reaction." Washington, D.C : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Energy Research ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2003. http://www.osti.gov/servlets/purl/816501-VTYjov/native/.
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Thesis (Ph.D.); Submitted to the Massachusetts Inst. of Tech., Cambridge, MA (US); 1 Oct 2003.Published through the Information Bridge: DOE Scientific and Technical Information. "JLAB-PHY-03-174" "DOE/ER/40150-2571" Zhengwei Chai. 10/01/2003. Report is also available in paper and microfiche from NTIS.
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Mikulskis, Andrius. "Kintamosios struktūros reguliatorių taikymo elektromechaninėse vykdymo sistemose tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2009~D_20090828_133808-10267.
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Įprasti elektromechaninių vykdymo sistemų dinamikos optimizavimo metodai – kiekybinis ir simetrinis optimumai turi savų privalumų bei trūkumų ir yra pagrįsti pastovios struktūros greičio reguliatoriais: proporciniu (P) ir proporciniu integruojančiu (PI). Siekiant suderinti kiekybinio ir simetrinio optimumų tiekiamus privalumus bei pašalinti jų trūkumus, užtikrindamas elektromechaninės vykdymo sistemos greičio dinaminį nuokrypį neviršijantį 5 % ir nulinį greičio statinį nuokrypį ištirtas P-PI valdymo dėsnio kintamos struktūros reguliatorius. Remiantis ITAE integraliniu kokybės rodikliu nustatyta geriausią elektromechaninės vykdymo sistemos dinamikos kokybę užtikrinanti greičio reguliatoriaus valdymo dėsnio perjungimo parametro priklausomybė nuo statinės apkrovos. Atlikti elektros pavaros su kintamos struktūros greičio reguliatoriumi veikimo imitacijos tyrimai MATLAB/Simulink programa. Nustatyta, kad P-PI kintamos struktūros reguliatorius užtikrina nuo 60,7 % iki 83,15 % geresnę elektromechaninės vykdymo sistemos dinamikos kokybę nei pastovios struktūros simetrinio optimumo reguliatorius (PI). Tačiau naudojant P-PI kintamos struktūros reguliatorių gaunama nuo 2,76 % iki 13,67 % blogesnė sistemos dinamikos kokybė nei PI-P-PI kintamos struktūros reguliatoriaus atveju.Classical dynamics optimization methods of the electromechanical servo drives are the quantitative and symmetrical optimums. These methods have advantages and disadvantages and are based on the fixed structure velocity controllers – proportional (P) and proportional-integrating (PI). In order to coordinate the advantages and eliminate disadvantages of the quantitative and symmetrical optimum methods have been investigated the P-PI variable structure velocity controller in the electromechanical servo drive. The P-PI variable structure velocity controller ensures that the dynamic error does not exceed 5 % and enables avoiding the static velocity error. According to the ITAE (Integral of Time multiplied by Absolute Error) quality indicator it was determined the control law switching parameter dependence on the static load ensuring the best dynamical quality of the electromechanical servo system. The investigations have been accomplished simulating the electromechanical servo system with P-PI variable structure velocity controller using MATLAB/Simulink program. It has been determined that P-PI variable structure velocity controller ensures from 60,7 % to 83,15 % better dynamical quality of the electromechanical servo system compared to the fixed structure controller (PI) of the symmetrical optimum. But using P-PI variable structure velocity controller the dynamical quality declines from 2,76 % to 13,67 % compared to the PI-P-PI variable structure velocity controller.
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Klundt, Michael. "Von der sozialen zur Generationengerechtigkeit? : polarisierte Lebenslagen und ihre Deutung in Wissenschaft, Politik und Medien." Wiesbaden VS, Verl. für Sozialwiss, 2008. http://www.springerlink.com/content/r4mw4v/?p=6924cbb414304c82815c678101243d3f&pi=0.
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Wang, Yifei [Verfasser], and Kai [Akademischer Betreuer] Schweda. "Charmed Meson Reconstruction in the D*+ -> D0 (K- pi+) pi+ Decay Channel in p-p Collisions at sqrt(s) = 7 TeV with the ALICE Experiment / Yifei Wang ; Betreuer: Kai Schweda." Heidelberg : Universitätsbibliothek Heidelberg, 2013. http://d-nb.info/1177811081/34.
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Grimm, Stephan Michael. "Theoretische Untersuchung von p-Bindungssystemen [Pi-Bindungssystemen] im Restricted-open-shell-Kohn-Sham-Modell." [S.l.] : [s.n.], 2005. http://edoc.ub.uni-muenchen.de/archive/00004747.
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Paap, Joachim. "Neuartige p-Organyle [pi-Organyle] der schweren Alkalimetalle und des Magnesiums Synthese und Festkörperstrukturen /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97280689X.
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Chłopek, Krzysztof. "Experimental study on iron complexes containing N,N'-coordinated o-diiminobenzosemiquinonate p [Pi] radicals." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975914685.
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Kress, Jochen. "Entwicklung und Installation eines Zentralkalorimeters und Messungen der Reaktion pp-]ppp+p- [pp pp pi+ pi-] mit spin-polarisierten Protonen am Flugzeitspektrometer COSY-TOF." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=969111258.
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Schouwink, Peter. "Optische Eigenschaften von p-konjugierten [pi-konjugierten] Modellsystemen Modifikation der Wechselwirkung von Licht mit Materie /." [S.l.] : [s.n.], 2002. http://ArchiMeD.uni-mainz.de/pub/2002/0047/diss.pdf.
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Chen, Zhijian. "P-stacks [pi-stacks] based on self-assembled perylene bisimides structural, optical, and electronic properties /." Doctoral thesis, [S.l.] : [s.n.], 2006. https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-19940.
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As a traditional industrial pigment, perylene bisimide (PBI) dyes have found wide-spread applications. In addition, PBI dyes have been considered as versatile and promising functional materials for organic-based electronic and optic devices, such as transistors and solar cells. For these novel demands, the control of self-organization of this type of dye and the investigation of the relationship between the supramolecular structure and the relevant optical and electronic properties is of great importance. The objective of this thesis focuses on gaining a better understanding of structural and functional properties of pi-stacks based on self-assembling PBIs. Studies include the synthesis and characterization of new functional PBI dyes, their aggregation in solution, in liquid crystalline state and on surfaces, and their fluorescence and charge transport properties. An overview of the formation, thermodynamics and structures of pi-stacks of functional pi- conjugated molecules in solution and in liquid crystalline phases is given in Chapter 2. Chapters 3 and 4 deal with the pi-pi aggregates of new, highly fluorescent PBIs without core-substituents. In Chapter 3, the self-assembly of a PBI with tridodecylphenyl substituents at imide N atoms both in solution and condensed phase has been studied in great detail. In condensed state, the dye exhibits a hexagonal columnar liquid crystalline (LC) phase as confirmed by DSC, OPM and X-ray diffraction analysis. The columnar stacking of this dye has been further confirmed by atomic force microscopy (AFM) where single columns could be well resolved The charge transport properties this dye have been investigated by pulse radiolysis-time resolved microwave conductivity (PR-TRMC) measurements. To shed more light on the nature of the pi-pi interaction of the unsubstituted PBIs, solvent depend aggregation properties have been investigated in Chapter 4. The studies are further extended from core-unsubstituted PBIs to core-substituted ones (Chapter 5 and 6). In Chapter 5, a series of highly soluble and fluorescent core-twisted PBIs that bear the same trialkylphenyl groups at the imide positions but different bay-substituents and were synthesized. These compounds are characterized by distortions of the perylene planes with dihedral angles in the range of 15-37° according to crystallographic data and molecular modeling studies. In contrast to the extended oligomeric aggregates formed for planar unsubstituted PBIs, this family of dyes formed discrete pi-pi-stacked dimers in apolar methylcyclohexane as concentration-dependent UV/Vis measurements and VPO analysis revealed. The Gibbs free energy of dimerization can be correlated with the twist angles of the dyes linearly. In condensed state, several of these PBIs form luminescent rectangular or hexagonal columnar liquid crystalline phases with low isotropization temperatures. The core-twisting effect on semiconducting properties has been examined in Chapter 6. In this chapter, a comparative study of the electrochemical and the charge transport properties of a series of non-substituted and chlorine-functionalized PBIs was performed. While Chapters 3-6 focus on one-component dye systems, Chapter 7 explored the possibility of a supramolecular engineering of co-aggregates formed by hydrogen-bonded 2:1 and 1:1 complex of oligo(p-phenylene vinylene)s (OPVs) and PBIs. Covalently linked donor-acceptor dye arrays have been prepared for comparison. Concentration and temperature-dependent UV/Vis spectroscopy revealed all hydrogen-bonded and covalent systems form well-ordered J-type aggregates in methylcyclohexane. With these hydrogen-bonded OPV-PBI complexes, fibers containing p-type and n-type molecules can be prepared on the nano-scale (1-20 nm). For the 2:1 OPV-PBI hydrogenbonded arrays hierarchically assembled chiral superstructures consisting of left-handed helical pi-pi co-aggregates (CD spectroscopy) of the two dyes that further assemble into right-handed nanometer-scale supercoils in the solid state (AFM study) have been observed. All of these well-defined OPV-PBI assemblies presented here exhibit photoinduced electron transfer on sub-ps timescale, while the electron recombination differs for different systems.Thus, it was suggested that such assemblies of p- and n-type semiconductors might serve as valuable nanoscopic functional units for organic electronicsAls traditionsreiches in industriellem Maßstab produziertes Pigment finden Perylenbisimid (PBI)-Farbstoffe Verwendung in vielen verschiedenen Anwendungsgebieten. Außerdem sind diese Farbstoffe aufgrund ihrer vielseitigen funktionellen Eigenschaften aussichtsreiche Kandidaten für auf organischen Materialen basierende elektronische und optische Einheiten, wie z.B. Transistoren oder Solarzellen. Für diese neuen Herausforderungen ist die gezielte Kontrolle bzw. Steuerung der Selbstorganisation dieser Farbstofftypen sowie die Erforschung des Zusammenhangs zwischen der supramolekularen Struktur und den optischen und elektronischen Eigenschaften von großem Interesse. Ziel dieser Arbeit war es daher, ein besseres Verständnis für strukturelle und funktionelle Eigenschaften pi-gestapelter Chromophore am Beispiel selbst-aggregierender PBI-Farbstoffe zu entwickeln. Dies umfaßt die Synthese und die Charakterisierung neuer funktioneller PBI-Farbstoffe, die Untersuchung ihrer Aggregate in Lösung, in flüssigkristallinen Phasen, Dünnschichten auf verschiedenen Oberflächen, sowie der Fluoreszenz- und Ladungsträgertransporteigenschaften. Ein Überblick über den Selbstaggregationsprozess, die thermodynamischen Eigenschaften und die Strukturen von pi-Stapeln verschiedener funktioneller pi-konjugierter Moleküle in Lösung und in flüssigkristallinen Phasen wird in Kapitel 2 gegeben. Kapitel 3 und 4 beschäftigen sich mit den pi-pi-Aggregaten neuartiger, stark fluoreszierender PBIs ohne Kernsubstituenten. In Kapitel 3 wurde das Aggregationsverhalten eines PBIs mit Tridodecylphenyl-Substituenten an den Imid-N-Atomen sowohl in Lösung als auch in der kondensierten Phase sehr detailiert untersucht. In der kondensierten Phase wurde eine kolumnar-hexagonale flüssigkristalline (LC) Phase mittels Differenzialkalorimetrie (DSC), optischer Polarisationsmikroskopie und Pulverröntgendiffraktometrie nachgewiesen. Die eindimensionale Stapelanordnung wurde zudem mittels Rasterkraftmikroskopie (AFM) bestätigt, welche ausgedehnte kolumnare Strukturen ergaben. Die Ladungstransporteigenschaften dieses Farbstoffes wurden mittels „pulse radiolysis-time resolved microwave“ (PR-TRMC) Experimenten untersucht. Zur weiteren Aufklärung der Natur der pi-pi-Interaktion des unsubstituierten PBI wurden in Kapitel 4 die lösungsmittelabhängigen Eigenschaften untersucht. Die Studien wurden zudem ausgedehnt von kernunsubstituierten auf kernsubstituierte PBIFarbstoffe. In Kapitel 5 werden die Synthesen einer Reihe sehr gut löslicher, fluoreszierender, nichtplanarer PBI-Farbstoffe vorgestellt, welche dieselben Trialkylphenylimidisubstituenten, jedoch unterschiedliche Bay-Substituenten tragen. Für diese Substanzen wurden mittels kristallographischer Daten sowie quantenchemischer Berechnungen Diederwinkelwinkel im Bereich 15 bis 37° ermittelt. Im Gegensatz zu den ausgedehnten oligomeren Aggregaten des planaren PBI bildet diese Farbstoffklasse aufgrund der Verdrillung des aromatischen Kerns in apolaren Lösungsmitteln wie Methylcyclohexan diskrete pi-pi-gestapelte Dimere. Die Freie Enthalpie für die Dimerisierung korreliert dabei linear mit dem Verdrillungswinkel. In der kondensierten Phase bilden einige dieser PBI-Farbstoffe fluoreszierende, rektangulare bzw. hexagonale kolumnare LC Phasen mit niedrigen Klärtemperaturen. In Kapitel 6 wurden die Auswirkungen des Verdrillungswinkels auf die Halbleitereigenschaften untersucht. Es wurden vergleichende Studien der elektrochemischen Eigenschaften sowie der Ladungsträgertransporteigenschaften einer Serie unsubstituierter und chlorfunktionalisierter PBI-Farbstoffe durchgeführt. Während in Kapitel 3-6 der Fokus auf Einkomponenten-Farbstoffaggregaten lag, wurde in Kapitel 7 die Möglichkeiten einer supramolekularer Anordnung von Co-Aggregaten untersucht, welche durch wasserstoffbrückengebundene 2:1 und 1:1 Komplexe zwischen Oligo(p-phenylenevinylenen) (OPVs) und PBIs aufgebaut sind. Mit diesen wasserstoffbrückengebundenen OPV-PBI Komplexen lassen sich eindimensionale Aggregate auf der Nanoskala erzeugen, welche aus p- und n-halbleitenden Molekülen bestehen. Für die wasserstoffbrückengebundenen 2:1 OPV-PBI Komplexe wurden Anordnungen beobachtet, welche chirale Überstrukturen mit links-drehenden, helicalen pi-pi- Co-Aggregaten (CD-Spectroscopie) aufweisen, die sich wiederum in rechts-drehenden Superhelices bündeln (AFM-Studien). Während für alle OPV-PBI Aggregate photoinduzierte Elektronentransferprozesse im subps Zeitskalenbereich beobachtet wurden, unterschieden sich die Rekombinationsraten je nach System beträchtlich. Somit ist diese Art von organisierten nanoskopischen p- und n-halbleitenden funktionellen. Bausteinen aussichtsreich für verschiedene Anwendungen in der Organischen Elektronik
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Nemer, Sérgio Nogueira. "Avaliação da força muscular inspiratória (Pi Max), da atividade do centro respiratório (P 0.1) e da relação da atividade do centro respiratório/força muscular inspiratória (P 0.1 / Pi Max) sobre o desmame da ventilação mecânica." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/5/5150/tde-02082007-104326/.
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Introdução: a hipótese deste estudo é de que a Pressão inspiratória máxima, Pressão de oclusão traqueal e sua razão podem predizer a evolução do desmame da ventilação mecânica em uma população mista de Terapia Intensiva. Métodos: A Pi Max , P 0.1 e a razão P 0.1 / Pi Max foram mensuradas em setenta pacientes consecutivos , intubados ou traqueostomizados, e ventilados mecanicamente, que preencheram os critérios para desmame da ventilação mecânica. Após a mensuração da Pi Max, P 0.1 e ainda da freqüência respiratória e volume corrente em litros com o cálculo da relação FR/VC e do produto P 0.1 x FR/VC, os pacientes foram submetidos a um teste de respiração espontânea. Os pacientes que toleraram o teste de respiração espontânea e não precisaram retornar para a ventilação mecânica no período de 24 horas foram considerados desmamados. A sensibilidade, especificidade, valor preditivo positivo, valor preditivo negativo, diagnóstico de acurácia e a área sob a curva ROC (receiver operating characteristic curve) foram calculadas. Resultados: Os valores médios da P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foram de 2,49±1,2, -34,6±13, 0,07±0,01, 75,4±33 e 184,6±123 respectivamente para os pacientes desmamados e 4,36± 2,0, -32,1±11,0 , 0,15± 0,09, 148,4± 42 e 652,9± 358 para os não desmamados da ventilação mecânica. Todos os índices distinguiram entre os pacientes desmamados e não desmamados, à exceção da Pi Max. A sensibilidade para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foi de 78,85, 65,38, 80,77, 82,69, 88,46 respectivamente. A especificidade para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foi de 72,2, 38,8, 72,2, 83,3, 72,2 respectivamente. Os valores preditivos positivos para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foram respectivamente 89,1, 75,5, 89,3, 93,4 e 90,2. Os valores preditivos negativos para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foram respectivamente de 54,1, 28,0, 56,5, 62,5 e 68,4. O diagnóstico de acurácia para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foi respectivamente de 77,1, 58,5, 78,5, 82,8 e 84,2. As áreas abaixo da curva ROC para a P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC foram respectivamente 0,76± 0,06, 0,52±0,08 , 0,78±0,06, 0,90±0,04 e 0,84±0,05. A comparação da áreas abaixo da curva ROC mostrou que os melhores índices foram a relação FR/VC, o produto P 0.1 x FR/VC e a relação P 0.1 / Pi Max não havendo diferença estatística entre eles. A pior área abaixo da curva ROC foi do índice Pi Max. Os índices de desmame da ventilação mecânica P 0.1, Pi Max e P 0.1/ Pi Max não foram diferentes estatisticamente entre os pacientes intubados e traqueostomizados. Conclusão: os melhores índices foram a relação FR/VC, o produto P 0.1 x FR/VC e a relação P 0.1 / Pi Max não havendo diferença estatística entre eles.Introduction: We hypothesized that maximal inspiratory pressure (Pi Max), airway tracheal occlusion pressure (P 0.1) and its ratio (P 0.1/Pi Max) can be used to predict weaning outcome in a mixed ICU mechanically ventilated patients. Methods: Pi Max, P 0.1 and P 0.1 / Pi Max ratio were measured in seventy consecutive intubated or tracheostomized, mechanically ventilated patients, who fulfilled weaning criteria. After these measurements of Pi Max, P0.1, respiratory rate and expiratory tidal volume (L) with the calculation of f / Vt ratio and the product P0.1x f / Vt , the patients were submitted to a spontaneous breathing trial (SBT) . Those who were able to sustain the SBT and had no need to return to mechanical ventilation in the following 24 hours were considered weaned. The sensitivity, specificity, positive predictive value, negative predictive value, diagnostic accuracy and Receiver- operating-characteristics (ROC) curves for this population were calculated. Results: The mean value of P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC e P 0.1 x FR /VC were 2,49 ±1,2, -34,6± 13, 0,07± 0,01, 75,4±33 and 184,6±123 respectively for the weaned patients and 4,36± 2,0, -32,1±11,0 , 0,15± 0,09, 148,4± 42 e 652,9± 358 for the not weaned patients. All the indexes distinguished between the weaned and not weaned patient, except for the Pi Max. The sensitivity for the P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were respectively 78,85, 65,38, 80,77, 82,69, 88,46. The specificity for P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were 72,2, 38,8, 72,2, 83,3, 72,2 respectively. The positive predictive value for P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were respectively 89,1, 75,5, 89,3, 93,4 e 90,2. The negative predictive value for P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were respectively 54,1, 28,0, 56,5, 62,5 e 68,4. The diagnostic accuracy for P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were respectively 77,1, 58,5, 78,5, 82,8 e 84,2. The area under the ROC curves for P 0.1 , Pi Max, P 0.1 / Pi Max, FR / VC and P 0.1 x FR /VC were respectively 0,76± 0,06, 0,52±0,08 , 0,78±0,06, 0,90±0,04 e 0,84±0,05. The comparison among the areas under the ROC curves showed that the best weaning indexes were f / Vt ratio, the product P 0.1 x f / Vt and the P0.1/ Pi Max ratio with no statistic differences among them. The Pi Max presented the smaller area under the ROC curve. The weaning indexes P 0.1, Pi Max e P 0.1/ Pi Max were not statistically different between intubated or tracheostomized patients. Conclusion: The best weaning indexes were f/Vt ratio , the product P 0.1 x f/Vt and the P 0.1 / Pi Max ratio with no statistically difference among them.
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Al, Tubuly Sara Ahmed I. "The production and perception of Libyan Arabic stress patterns by English speaking learners : a comparison with native speakers." Thesis, University of Essex, 2016. http://repository.essex.ac.uk/17923/.
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This dissertation examines the production and perception of some selected stress patterns in Libyan Arabic by English speaking learners and compares them to the production and perception of the native speakers. Two tasks were utilised to investigate the participants’ performance: a picture naming and an identification task. Word patterns covered potential problematic and non-problematic areas. An optimality theoretic approach is adopted in the discussion of the results of the perception and production of stress by the participants (Chapters 5 & 7) while a metrical approach is referred to in the discussion of the Libyan Arabic stress system in Chapter 3. It is found that structural effects (e.g. syllable structure, vowel quality, syllable position or class) have consequences on how the learners perceive and produce stress and on how they use this information in assigning stress. The study found that if the stress patterns match in the L1 and L2, and they follow regular phonological conditions, the learners get these patterns right by just applying the predictable patterns. If the stress patterns are similar but applied differently and they contradict predictable conditions, these unpredictable and/or marked patterns are not accessible in the L2 despite their partial availability in the L1. If a particular stress pattern does not exist in the L1, then the L1 negative transfer effect may appear in the L2. The misperception of stress is not only restricted to L2 learners but native speakers also fail in certain patterns to perceive the stress location. The learners use grammatical class and syllable structure as stress indicators but they show a deviation from the native speakers in using the vowel length cue. The native speakers are more sensitive to vowel length; the absence of vowel length or syllable closure in the stressed syllable in certain patterns prevent the native speakers from perceiving stress accurately.
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Roberts, K. "Production and decay properties of charm in 360 GeV/c#pi#'-p and GeV/cpp interactions." Thesis, University of Liverpool, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377134.
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Kocoloski, Adam (Adam Philip). "Measurement of longitudinal double spin asymmetries of [pi]+/- production in p[over-arrow] + p[over-arrow] collisions at [sqrt]s = 200 GeV at RHIC." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62647.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2010.In title on title page [pi], [over-arrow], and [sqrt] appear as symbols. Cataloged from PDF version of thesis.
Includes bibliographical references (p. 101-105).
Spin dependent measurements provide incisive tests for modern theories of particle physics. The discovery that the integral of the quark helicity distribution is much too small to account for the spin of the proton is an excellent case in point. It inspired an intense period of theoretical scrutiny and a new generation of experiments to study [Delta]g, the helicity distribution of gluons in the nucleon. In particular, the unique polarized proton collider at RHIC enables a class of asymmetry measurements that are directly sensitive to gluon polarization. The STAR experiment at RHIC measures the double spin asymmetry A[subscript LL] for a variety of final states in collisions of longitudinally polarized protons in order to constrain [Delta]g. Asymmetries for mid-rapidity charged pion production benefit from large cross sections and the excellent tracking and particle identification capabilities of the STAR Time Projection Chamber. This thesis presents the first measurements of charged pion A[subscript LL] at STAR. The measurements are compared to predictions based on perturbative QCD calculations and from this comparison model-dependent constraints are placed on the integral gluon polarization [Delta]G.
by Adam Kocoloski.
Ph.D.
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Thái, Minh Thanh 1976. "A GEANT4 simulation of the recoil proton stopping acceptance in the near-threshold γ p [right arrow] [pi]⁰p reaction on a scintillator target." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/36096.
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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.In title on t.p., "[right arrow]" is the symbol and "[pi]" is the lower-case Greek letter.
Includes bibliographical references (leaf 50, 1st group).
The simulation of the recoil proton stopping acceptance in the near-threshold [gamma]p [right arrow] [pi]⁰p reaction on a CH1.1 scintillator target has been carried out using the new state-of-the-art CERN GEANT4 toolkit. The photo-production cross-section was generated to be uniform in cos OCM and OcM- Incident photons with energy uniformly distributed in the range of 150MeV to 250MeV were used. The simulation focused on the effects of the size of the incident photon beam. In additions, the hardening efficiency of the bremsstrahlung photon beam using beryllium absorber was studied.
by Minh Thanh Thái.
S.B.
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Chan, Elsie Kit-ying. "Translation as metaphor : Yan Fu and his translation principles." Thesis, University of Warwick, 2003. http://wrap.warwick.ac.uk/1231/.
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This thesis was motivated by turn-of-the-century concerns in Chinese translation studies about the validity of the long-held translation principles proposed by Chinese translator Yan Fu and about the relevance of Yan's paradigmatic translation project to future research. It rereads the translation practice and intellectual thought of Yan Fu by adopting an interdisciplinary approach restructuring past studies that have been isolated in the areas of intellectual history and translation theory. The examination of his translation practice through a series of metaphor suggests, contrary to existing consensus, that faithfulness to the source text is irrelevant to his translation project. His translation principles are not pure literary notions; rather they are tied to the Confucian literary and exegetical tradition. These findings unfold new potentialities for a major research topic that has been challenged as having reached a cul-de-sac and point to a new direction for development in Chinese translation studies. New findings from the field of intellectual history help to clarify existing inconsistencies and political biases concerning Yan Fu's persona and historicize him as a persistent seeker of the Confucian dao. This testifies to the need to reassess his translation project in relation to the Confucian-based Chinese tradition. Close examination of his remarks on translation, correspondence and other writings suggests that his words and deeds are steeped in Confucian poetics, which represents a totally different concept from modern pure literary poetics. His commitment to Confucian ontological faith and ultimate concern for spiritual or cosmological transcendence are similar to the ends of some of the most influential translators in Chinese history and marks a higher level operation of translation as a tool for higher learning than as an occupation. Through translation as-intellectual critique, Yan mended indigenous coordinates for gauging alien propositions and constructed a hybridized discourse for reforming indigenous epistemology and methodology. His manipulative translations, as he claimed in his last extended translation, were intended for metaphorical explication of a certain subject with the source text as a point of departure, rather than an end to return to. Ironically the repercussions of the manipulative evolutionary discourse he engendered became further manipulated by the newer generations and fuelled more violent changes in a system on the verge of a crisis. While this subsequently led to the disruption of the conservative Confucian poetics and the gradual reform agenda he had desired, the reexamination of his translations and translation practice sheds light on system regeneration and the inheritance of Chinese culture in a modern world. The presentation of Yan Fu's translations suggests that he followed the Confucian literary tradition, which allowed exegetical and eisegetical interpretation of classics and commentaries for narrating the dao, and attempted mediation of a changing dao through translation as intellectual critique. Hermeneutical rereading of his xin-da-ya translation principles in relation to the Confucian exegetical tradition frees the study of his principles from recurrent perspectives and offers a systematic approach to the study of xin, da and ya as core values in Confucian poetics meaning faith, decorum and virtue respectively. His exercise of Confucian cosmological faith through translation releases the source text for a dialogue with a broader cosmic text, whereby the interaction of time and tradition-bound discourses obliges the translator to repeatedly highlight and transcend his own interpretive horizons and move the physical text beyond its original psychological and historical contexts, evincing dynamic interaction with the reader. This perspective offers a philosophical dimension to translation and valourizes translation as a virtuous act of conduct in the Chinese tradition and as cosmological transference of concepts and images in human's pursuit of truth and being. The promotion of the complex notion of translation beyond the word itself to the realm of metaphor facilitates exchange between languages and systems at the level of tertium comparationis and enables reasoning at the level of the universal logos. In the present study of Yan Fu, this helps to avoid recurrent arguments and leads to more balanced and constructive perspectives for the future development of a major research topic in Chinese translation studies. It also opens the possibility of exchange between a traditional theory and modern theories and between the Chinese translation tradition and other traditions.
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Dahroj, Fawaz Ahmad. "The effect of modern linguistics on Arabic literary criticism : the stylistic approach and its application to Arabic poetry." Thesis, University of Glasgow, 1998. http://theses.gla.ac.uk/6494/.
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The main objective of this study is to show how "the Stylistic Phenomenon" has entered Arabic literary critical life. It aims to examine "Practical Criticism" in Arabic, which adopts a "stylistic approach". In order to achieve this, however, it is essential to have examined a complete picture of this approach in Arabic literary life in all its aspects, most of which are concerned with issues, of stylistic theory rather than practical stylistics. Efforts have been devoted to establishing it as a separate recognised approach: in the theory of translation, in matters of terminology, in traditional Arabic literary criticism, etc. The "Stylistic Approach" in Arabic literary life, as examined here, also illustrates the whole situation of the real relationship of Arabic literary criticism with modern literary criticism in The West. There are various channels of connection with modern Western literary criticism, such as the translation of the most important works relating to this topic into Arabic, either as monographs or as articles in literary journals. There are also Arab writers who have been educated in The West and who are applying the stylistic approach to Arabic literature. This study shows the connection of Arab scholarship with the modern linguistic revolution in the West, from which the stylistic approach is the fruit. It is clear that the most important figures in modern linguistics, particularly those whose works are influenced by modern Western linguistics or have been affected by modern Western literary criticism, are well-known, and the Arab reader is familiar with Althusser, Bakhtin, Bally, Barthes, Brooks, Chatman, Chomsky, Cohen, Derrida, Foucault, Genette, Jakobson, Levi-Strauss, Saussure and many others.
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Chaudhary, Mohammad Akram. "al-Furūq fī al-lughah by Abū Hilāl al-ʻAskarī : a thesaurus for distinctions of meaning between assumed synonyms in Arabic." Thesis, University of Glasgow, 1985. http://theses.gla.ac.uk/6922/.
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Shih, Pei Chun. "Cross-linguistic transference of politeness phenomena." Thesis, University of Birmingham, 2011. http://etheses.bham.ac.uk//id/eprint/1697/.
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In this thesis, I have examined the screen translation of Japanese politeness into Cantonese dubbing as well as Chinese subtitling at three difference levels: (a) face threatening acts; (b) frequently used politeness markers and (c) discernment aspect of politeness. It is not difficult to find equivalents in the target languages for the politeness strategies exploited in dealing with face threatening acts. However, the indirectness expressed through certain commonly adopted politeness markers (such as negative interrogative) in Japanese cannot be conveyed into our target languages easily. Translators also encounter some difficulties when they deal with the discernment aspect of Japanese politeness (i.e. the distinction between plain, formal and honorific form). Both target languages are able to distinguish politeness of two levels instead of three as observed in the Japanese original. Finally, the screen translation, especially the dubbed version, of the two films that I examined demonstrates the dual role of a translated text as not only a reproduction of the original text but also a text which has its function in the target culture.
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Shagmani, Abulgasem Muftah. "The structure of Libyan Arabic discourse as depicted in two Arabic interviews recorded by the Libyan Jiha'd Studies Centre in Tripoli." Thesis, University of Glasgow, 2002. http://theses.gla.ac.uk/1588/.
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This thesis attempts to investigate the structure of Libyan Arabic discourse in general and interviews as a text-genre text-form in particular. This investigation includes conjunctions and their influence on the cohesion of interviews and certain other textual phenomena, i.e. repetition, parallelism and their unequivocal significance in text cohesion. To this effect, random samples were taken from two Libyan Arabic interviews, i.e. sample text 1 and sample text 2 to who how the structure of these texts is made up. To achieve these objectives, this study uses a semantic, structural and pragma-semio-textual approach to analyse and then translate the texts chosen, as language in this study is considered to be a form of behaviour (Halliday 1973) that cannot be studied in isolation from its social, cultural and contextual contexts in which it is used. Our textual analysis has shown interesting results. First, interviews have their own generic structure and such structure is presented in specific stages. Second, interviews favour the cohesive type of lexical repetition not only for cohesion purposes but also for persuasive functions as well. Third, interviews use many parallel constructions for conviction and persuasive functions.
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Hikima, Noriko. "The effects of processing instruction and re-exposure on interpretation discourse level tasks : the case of Japanese passive forms." Thesis, University of Greenwich, 2010. http://gala.gre.ac.uk/6604/.
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The present study was conducted to investigate possible interpretation discourse level effects of processing instruction and re-exposure to processing instruction on the acquisition of a specific feature of the Japanese linguistics system: namely Japanese passive forms. Processing instruction is a type of focus on form which is framed around the input processing theoretical framework. In order to carry out this investigation two separate experimental studies were conducted. All participants were native English speakers and were randomly assigned to two groups. In both experimental studies, one group received processing instruction which involved an explicit instruction component and structured input practice directed at altering the way L2 learners process input; the other group was used as a control group and received no instruction. Interpretation and production sentence level tasks, and discourse level tasks were used to measure performance after a one day instruction. A pre-test/post-test design was adopted to collect data in both studies. In the second experimental study, the processing instruction group received a re-exposure treatment between the post-test and the delayed post-test. Based on previous research carried out on the effectiveness of processing instruction, it was hypothesised that processing instruction would have positive effects on the accuracy with which subjects interpreted and produced sentences containing Japanese passive forms. A further hypothesis was that the effects of re-exposure to the processing instruction treatment (after the first post-test) would further improve subjects ability to interpret and produce sentences containing Japanese passive forms. A set of two hypotheses were formulated on possible interpretation discourse effects for processing instruction. It was hypothesised that the group receiving processing instruction would improve in its ability to interpret discourse (guided recall: dialogue and story version) containing Japanese passive forms, and that learners in this group, receiving re-exposure to the processing instruction treatment would further improve in their ability to interpret discourse containing Japanese passive forms. Overall the statistical analyses carried out on the raw scores of all the measures used supported the four hypotheses of this study. The results obtained in this research provide clear evidence that processing instruction has positive effects on the acquisition of Japanese passive construction. The present study showed that processing instruction was successful in altering the way in which learners processed the input and its effects had also an impact on the way learners produced Japanese passive construction forms. The main findings of the present study also provided new evidence on the effectiveness of processing instruction in improving learners’ performance on interpretation discourse level tasks. In addition to this, it also provides new evidence that learners receiving re-exposure to the processing instruction treatment between a post-test and a delayed post-test can further improve in their ability to interpret and produce the target feature at sentence level and interpret the target feature at discourse level. The results obtained in the two studies have implications at two levels. At the theoretical level this research provides further support for the role that input processing plays in SLA. At the pedagogical level it demonstrates the effectiveness of processing instruction on the acquisition of a different linguistic feature of the Japanese grammar system (passive forms), not only on an interpretation and production sentence level task but also on an interpretation discourse level task. It also demonstrated the important role of a re-exposure instructional treatment.
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Anber, Mohammed al. "Organic and, or inorganic p-conjugated [pi-conjugated] units in the synthesis of multinuclear transition metal complexes." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=97031387X.
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Ramasamy, Saminathan. "Characterising the pharmacology of a P-superfamily peptide, pi-conopeptide AMIXA, from the venom of Conus amadis." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502363.
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Peptides from venom of marine cone snails are regarded as promising novel ligands in drug discovery race. They are highly specific, up to subtype level, leading to new therapeutic insights for clinical and neuropharmacological research and applications. In this study, a novel peptide AMIXA, belongs to the P-superfamily, has been characterised pharmacologically and is classed as a π-conopeptide according to its pharmacological function.
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Seekoe, Tshepo W. "Mechanism of sarcoplasmic reticulum Ca-ATPase and multidrug resistance P-glycoprotein probed by Pi-HOH oxygen exchange." Doctoral thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/2702.
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Schiller, Carsten. "s-Organyle [Sigma-Organyle] und p-Komplexe [Pi-Komplexe]: Beiträge zur Organometallchemie der Platinelemente Pt, Rh und Ir." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=969898215.
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Wittekindt, Carsten. "Theoretische Untersuchungen zum Einfluss der p-Orbitalreihenfolge [Pi-Orbitalreihenfolge] nichtkonjugierter Alkadiene auf die Regioselektivität ihrer intramolekularen Singulett-Photocycloaddition." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=971683360.
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Ferrari, Fabio. "Measurement of CP asymmetries in $\lambda^0_b \to pk^-$ and $\lambda^0_b \to p \pi^-$ decays at LHCb." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7041/.
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The LHCb experiment has been designed to perform precision measurements in the flavour physics sector at the Large Hadron Collider (LHC) located at CERN. After the recent observation of CP violation in the decay of the Bs0 meson to a charged pion-kaon pair at LHCb, it is interesting to see whether the same quark-level transition in Λ0b baryon decays gives rise to large CP-violating effects. Such decay processes involve both tree and penguin Feynman diagrams and could be sensitive probes for physics beyond the Standard Model.
The measurement of the CP-violating observable defined as ∆ACP = ACP(Λ0b → pK−)−ACP(Λ0b →pπ−),where ACP(Λ0b →pK−) and ACP(Λ0b →pπ−) are the direct CP asymmetries in Λ0b → pK− and Λ0b → pπ− decays, is presented for the first time using LHCb data. The procedure followed to optimize the event selection, to calibrate particle identification, to parametrise the various components of the invariant mass spectra, and to compute corrections due to the production asymmetry of the initial state and the detection asymmetries of the final states, is discussed in detail.
Using the full 2011 and 2012 data sets of pp collisions collected with the LHCb detector, corresponding to an integrated luminosity of about 3 fb−1, the value ∆ACP = (0.8 ± 2.1 ± 0.2)% is obtained. The first uncertainty is statistical and the second corresponds to one of the dominant systematic effects. As the result is compatible with zero, no evidence of CP violation is found. This is the most precise measurement of CP violation in the decays of baryons containing the b quark to date. Once the analysis will be completed with an exhaustive study of systematic uncertainties, the results will be published by the LHCb Collaboration.
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Creusen, Charlotte M. "Phaseneigenschaften von pentakoordinierten 18-e-d8-Übergangsmetall-p-Allyl-Komplexen [18-e-d-8-Übergangsmetall-Pi-Allyl-Komplexen]." Aachen Mainz, 2009. http://d-nb.info/995293791/04.
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Laplace, Sandrine. "Mesure des rapports d'embranchement et recherche de la violation de CP dans les modes B0→ p(pi), pK." Paris 7, 2003. https://tel.archives-ouvertes.fr/tel-00003224.
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