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1
Demil, Karim. „Formes modulaires de Maass et formes quadratiques indéfinies“. Bordeaux 1, 1990. http://www.theses.fr/1990BOR10601.
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Les formes de maass jouent un role important dans la theorie des formes modulaires non-analytiques, en liaison avec l'etude de siegel sur la theorie des formes quadratiques indefinies. Apres introduction de certains operateurs differentiels, on etudiera quelques correspondances entre formes de maass et formes modulaires holomorphes, ainsi que la projection holomorphe des formes de maass. On verra ensuite des identites entre des fonctions theta associees a des corps quadratiques reels et des fonctions theta associees a des corps quadratiques imaginaires
2
Remón, Adell Dionís. „Formes d'ona de Maass i aplicacions = Maass waveforms and applications“. Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396139.
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Aquesta memòria està dedicada principalment al tractament computacional de les formes d’ona de Maass i a la consideració d’algunes aplicacions pràctiques derivades del seu estudi. Per abreujar, designarem aquestes funcions, simplement, amb el nom de formes de Maass. Les formes de Maass són funcions infinitament diferenciables que presenten comportaments periòdics (és a dir, automorfs) respecte de grups fuchsians. Des d’un punt de vista numèric, podem dir que les formes de Maass són força més misterioses que les formes automorfes habituals, que són funcions meromorfes. D’aquestes, i especialment quan el grup d’automorfia és un subgrup de congruència del grup modular, se’n coneixen nombrosos exemples numèrics, alguns dels quals es remunten al segle XIX, mentre que ha estat únicament en els darrers anys que s’han obtingut alguns exemples explícits de formes de Maass, referits tots ells a subgrups de congruència del grup modular. D’entrada, la tesi contempla una exposició i una implementació d’algoritmes existents pel càlcul de desenvolupaments a l’entorn de la punta de l’infinit de formes de Maass respecte de subgrups de congruència del grup modular. Tot seguit proposem un conjunt d’algoritmes que, d’acord amb la filosofia de [BT07a] i [BT07b], s’orienten cap a l’obtenció dels desenvolupaments de formes de Maass a l’entorn de punts no necessàriament cuspidals. Aquests algoritmes es tracten en el cas modular i, també, en el cas quaterniònic, en què el grup fuchsià prové de les unitats d’un ordre d’una àlgebra de quaternions racional indefinida. El caràcter discontinu dels grups fuchsians ha estat emprat en el disseny dels anomenats algoritmes de reducció de punts, els quals han resultat bàsics per als objectius anteriors. Al mateix temps, hem fet ús d’aquests algoritmes de reducció de punts pel disseny de codis nous de transmissió de dades en xarxes sense fils i aptes, per tant, per als mòbils que emprem diàriament. Per causa del seu origen, els hem anomenat codis fuchsians.
La memòria està dividida en tres parts i un apèndix. La primera part comprèn del capítol 1 al cap´ıtol 4. Conté una exposició teòrica dels grups fuchsians així com també el desenvolupament d’eines computacionals orientades a les aplicacions posteriors del treball. La segona part comprèn els capítols 5 al 8. En ella presentem les formes de Maass i els conceptes destinats al càlcul dels seus desenvolupaments. La tercera part, que comprèn els capítols 9 i 10, és la dedicada al disseny dels codis fuchsians per a la transmissió de dades. A l’apèndix s’hi troba un resum en anglès.
3
Menes, Thibaut. „Grandes valeurs des formes de Maass sur des quotients compacts de grassmanniennes hyperboliques dans l’aspect volume“. Electronic Thesis or Diss., Paris 13, 2024. http://www.theses.fr/2024PA131059.
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Soient n > m = 1 des entiers tels que n + m >= 4 soit pair. On prouve l’existence, dans l’aspect volume, de formes de Maass exceptionnelles sur des quotients compacts de la grassmanienne hyperbolique de signature (n,m). La méthode repose sur le travail de Rudnick et Sarnak, étendu par Donnelly puis généralisé par Brumley et Marshall en rang supérieur. Celle-ci combine un argument de comptage et une relation de périodes permettant de montrer qu’une certaine période distingue les relèvements thêta depuis un groupe auxiliaire. La structure de niveau est définie relativement à cette période et le groupe auxiliaire qui intervient est U(m,m) ou Sp_2m(R), de sorte que (U(n,m),U(m,m)) ou (O(n,m),Sp_2m(R)) soit une paire duale réductive de type 1. La borne inférieure s’exprime naturellement, à un facteur logarithmique près, comme le quotient des volumes avec la structure de congruence principale sur le groupe auxiliaireLet n > m = 1 be integers such that n + m >= 4 is even. We prove the existence, in the volume aspect, of exceptional Maass forms on compact quotients of the hyperbolic Grassmannian of signature (n,m). The method builds upon the work of Rudnick and Sarnak, extended by Donnelly and then generalized by Brumley and Marshall to higher rank. It combines a counting argument with a period relation, showingthat a certain period distinguishes theta lifts from an auxiliary group. The congruence structure is defined with respect to this period and the auxiliary group is either U(m,m) or Sp_2m(R), making (U(n,m),U(m,m)) or (O(n,m),Sp_2m(R)) a type 1 dual reductive pair. The lower bound is naturally expressed, up to a logarithmic factor, as the ratio of the volumes, with the principal congruence structure on the auxiliary group
4
Griffin, Michael John. „Applications of Harmonic Maass Forms“. Thesis, Emory University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3708974.
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In this thesis, we prove various results in the theory of modular forms and harmonic Maass forms, representation theory, elliptic curves and differential geometry. In particular, we give a broad framework of Rogers-Ramanujan identities and algebraic values; we prove that Ramanujan's mock theta functions satisfy his original conjectured definition; and we show that certain harmonic Maass forms which arise naturally from the arithmetic of elliptic curves encode central L-values and L-derivatives involved in the Birch and Swinnerton-Dyer conjecture. We also prove a conjecture of Moore and Witten connecting the regularized u-plane integral on the complex projective plane with Donaldson invariants for the SU(2)-gauge theory. In our final two applications, we turn to moonshine phenomena. Monstrous Moonshine relates the Fourier coefficients of certain modular functions to values of the irreducible characters of the Monster group--the largest of the sporadic simple groups. We give the asymptotic distribution of these character values, answering a question of Witten with applications to mathematical physics. The Umbral Moonshine conjectures relate the the values of irreducible characters of prescribed finite groups with the Fourier coefficients of distinguished mock modular forms. Gannon has proved this for the special case involving the largest sporadic simple Mathieu group. We complete the proof in the remaining cases.
5
Zhao, Peng. „Quantum Variance of Maass-Hecke Cusp Forms“. The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243916906.
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Salazar, Nathan. „Resonance for Maass forms in the spectral aspect“. Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3179.
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Let ƒ be a Maass cusp form for Γ0(N) with Fourier coefficients λƒ(n) and Laplace eigenvalue ¼+k2. For real α≠0 and β>0 consider the sum:
∑nλƒ(n)e(αnβ)Φ(n/X), where Φ is a smooth function of compact support. We prove bounds on the second spectral moment of this sum, with the eigenvalue tending toward infinity. When the eigenvalue is sufficiently large we obtain an average bound for this sum in terms of X. The method is adopted from proofs of subconvexity bounds for Rankin-Selberg L-functions for GL(2)×GL(2). It contains in particular the Kuznetsov trace formula and an asymptotic expansion of a well-known oscillatory integral with an enlarged range of Kε≤L≤K1-ε. The same bounds can be proved in the same way for holomorphic cusp forms.
Furthermore, we prove similar bounds for
∑nλf(n)λg(n)e(αnβ)Φ(n/X),
where g is a holomorphic cusp form. As a corollary, we obtain a subconvexity bound for the L-function L(s, f ×g). This bound has the significant property of breaking convexity even for the trivial bound toward the Generalized Ramanujan Conjecture.
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Debonne, Patrick Gérard. „Théophagie et formes polynésiennes“. Polynésie française, 2004. http://www.theses.fr/2004POLF0003.
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La recherche concerne l'aporie de l'anthropologie symbolique maussienne (Marcel Mauss 1872-1950) et très généralement la symbolique du temps dans les formes en Océanie (pétroglyphes, décorations, dessins primitifs, tatouages, etc. . . ). Cette recherche se construit en quatre étapes. Attente et Tabou : Les questions sur l'attente sociale de Marcel Mauss n'ont pas reçu de réponses satisfaisantes. L'examen du ‘blocage' théorique, l'impasse des psychologies de ‘l'émotion' et la question du tabou polynésien sont renouvelés pour mettre en évidence les fausses pistes de l'anthropologie contemporaine. Attente sociale et tabou sont reliés pour relire l'Essai sur le Don où les questions du don et du temps sont posées aporétiquement : pour donner, il faudrait ne rien attendre, et donc qu'est-ce qu'attendre ? Les lectures sociologiques et culturalistes ne saisissent pas la symbolique sociale, méconnaissent le symbolique et la ‘pragmatique' que Mauss cherchait à fonder. Cette étape saisit l'actualité de la question posée et ouvre le débat. Anthropologie et Psychanalyse : L'anthropologie pseudo-freudienne prétend réfléchir une ‘pragmatique' en la sortant de son domaine symbolique et donc il est nécessaire de revenir historiquement sur les relations entre les deux disciplines. Cette étape reprend les éléments historiques et méthodologiques. Théophagie et Formes de la ‘persona' : La ‘consommation' du présent autorise une symbolique océanienne fondatrice. Un fantasme anthropologique universel condense tous les stades de l'oralité polynésiennes. Comment permettre l'appréciation culturelle du peuple polynésien après l'Essai sur le Don ? Lier l'analyse des contre-investissements refoulant ce fantasme à l'apparition de ‘signifiants' formels du ‘temps' dans les formes et tatouages. Force refoulante contre la pulsion cannibalique, la représentation théophagique océanienne apparaît comme un ‘masque formel'. Cette étape situe la clef fondamentale pour saisir une symbolique socialeThis research work deals specifically with the aporia of Maussian symbolical anthropology (Marcel Mauss 1872-1950) and more generally with the symbolism of time in Oceanian forms (petroglyphs, decorations, primitive drawings, tattooings, etc. . . ). It is divided into four parts. Expectations and Taboo : The questions asked by Mauss about social expectations have never been satisfactorily answered. A reappraisal of the theoretical ‘block', the dead-end of the psychology of ‘emotions' and the theme of Polynesian taboo is proposed to show how contemporary anthropology has been led astray. Social expectations and taboo are linked to inspire a second reading of The Gift in which both themes of gift and time are aporetically tackled. If giving and expecting are mutually exclusive, what does expecting mean ? Cultural and sociological interpretations fail to grasp social symbolism, are unaware of the symbolic system and pragmatics which Mauss was attempting to found. This first stage stresses the topicality of our work and open the debate. Anthropology and Psychoanalysis : Pseudo-Freudian anthropology claims to be giving birth to a ‘pragmatics' by taking it out of its symbolical realm. It is therefore necessary to historically look back on the relationships that the two sciences have been entertaining. This second stage takes up again the historical and methodological elements. Theophagy and Forms of the ‘Persona' : The ‘consumption' of the present renders possible a founding Oceanian symbolic system. A universal anthropological fantasy condenses all the phases of Polynesian orality. How does The Gift affect our cultural perception of the Polynesians ? By tying up the analysis of the counterinvestments repressing that fantasy to the apparition of formal ‘signifiers' of time in forms and tattoos. Force aimed at the cannibalistic drive, the Oceanian theophagous representation looks like a ‘formal mask'
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Qin, Huan. „Averages of fractional exponential sums weighted by Maass forms“. Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5607.
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The purpose of this study is to investigate the oscillatory behavior of the fractional exponential sum weighted by certain automorphic forms for GL(2) x GL(3) case. Automorphic forms are complex-values functions defined on some topological groups which satisfy a number of applicable properties. One nice property that all automorphic forms admit is the existence of Fourier series expansions, which allows us to study the properties of automorphic forms by investigating their corresponding Fourier coefficients. The Maass forms is one family of the classical automorphic forms, which is the major focus of this study.
Let f be a fixed Maass form for SL(3, Z) with Fourier coefficients Af(m, n). Also, let {gj} be an orthonormal basis of the space of the Maass cusp form for SL(2, Z) with corresponding Laplacian eigenvalues 1/4+kj^2, kj>0. For real α be nonzero and β>0, we considered the asymptotics for the sum in the following form Sx(f x gj, α, β) = ∑Af(m, n)λgj(n)e(αn^β)φ(n/X) where φ is a smooth function with compactly support, λgj(n) denotes the nth Fourier coefficient of gj, and X is a real parameter that tends to infinity. Also, e(x) = exp(2πix) throughout this thesis.
We proved a bound of the weighted average sum of Sx(f x gj, α, β) over all Laplacian eigenvalues, which is better than the trivial bound obtained by the classical Rankin-Selberg method. In this case, we allowed the form varies so that we can obtain information about their oscillatory behaviors in a different aspect. Similar to the proofs of the subconvexity bounds for Rankin-Selberg L-functions for GL(2) x GL(3) case, the method we used in this study includes several sophisticated techniques such as weighted first and second derivative test, Kuznetsov trace formula, and Voronoi summation formula.
9
Savala, Paul. „Computing spectral data for Maass cusp forms using resonance“. Diss., University of Iowa, 2016. https://ir.uiowa.edu/etd/3182.
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The primary arithmetic information attached to a Maass cusp form is its Laplace eigenvalue. However, in the case of cuspidal Maass forms, the range that these eigenvalues can take is not well-understood. In particular it is unknown if, given a real number r, one can prove that there exists a primitive Maass cusp form with Laplace eigenvalue 1/4 + r2. Conversely, given the Fourier coefficients of a primitive Maass cusp form f on Γ0(D), it is not clear whether or not one can determine its Laplace eigenvalue. In this paper we show that given only a finite number of Fourier coefficients one can first determine the level D, and then compute the Laplace eigenvalue to arbitrarily high precision. The key to our results will be understanding the resonance and rapid decay properties of Maass cusp forms. Let f be a primitive Maass cusp form with Fourier coefficients λf (n). The resonance sum for f is given by SX(f;α;β) = Εn≥1λf(n)‑Φ(n/X) e(αnβ) where φ ∈ Cc∞((1, 2)) is a Schwartz function and α ∈ R and β, X > 0 are real numbers. Sums of this form have been studied for many different classes of functions f, including holomorphic modular forms for SL(2, Z), and Maass cusp forms for SL(n,Z). In this paper we take f to be a primitive Maass cusp form for a congruence subgroup Γ0(D) ⊂ SL(2, Z). Thus our result extends the family of automorphic forms for which their resonance properties are understood. Similar analysis and algorithms can be easily implemented for holomorphic cusp forms for Γ0(D). Our techniques include Voronoi summation, weighted exponential sums, and asymptotics expansions of Bessel functions. We then use these estimates in a new application of resonance sums. In particular we show that given only limited information about a Maass cusp form f (in particular a finite list of high Fourier coefficients), one can determine its level and estimate its spectral parameter, and thus its Laplace eigenvalue. This is done using a large parallel computing cluster running MATLAB and Mathematica
10
Candelori, Luca. „Towards a p-adic theory of harmonic weak Maass forms“. Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:8881/R/?func=dbin-jump-full&object_id=92409.
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Olivetto, René [Verfasser], Kathrin [Akademischer Betreuer] Bringmann und Sander [Akademischer Betreuer] Zwegers. „Harmonic Maass Forms, Jacobi Forms, and Applications to Lie Superalgebras / René Olivetto. Gutachter: Kathrin Bringmann ; Sander Zwegers“. Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1064693350/34.
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Olivetto, René Verfasser], Kathrin [Akademischer Betreuer] [Bringmann und Sander [Akademischer Betreuer] Zwegers. „Harmonic Maass Forms, Jacobi Forms, and Applications to Lie Superalgebras / René Olivetto. Gutachter: Kathrin Bringmann ; Sander Zwegers“. Köln : Universitäts- und Stadtbibliothek Köln, 2014. http://d-nb.info/1064693350/34.
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Zapata, Theo Allan Darn. „Formas automórficas e as L-funções de Hecke-Maass e Rankin Selberg“. reponame:Repositório Institucional da UnB, 2006. http://repositorio.unb.br/handle/10482/2584.
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Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Exatas, Departamento de Matemática, 2006.Submitted by wesley oliveira leite (leite.wesley@yahoo.com.br) on 2009-11-25T16:08:33Z No. of bitstreams: 1 2006_TheoAllanDarnZapata.pdf: 585718 bytes, checksum: 6c3355de7df60627ab844ddbb518297a (MD5)
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Neste trabalho estabelecemos propriedades analíticas e aritméticas de duas L- funções automór cas para o grupo modular, as de Hecke-Maass e Rankin-Selberg. A partir das quais, obtemos limitantes superiores para somas de coe cientes de formas automór cas cuspidais. ________________________________________________________________________________________ ABSTRACT
In this work we estabilish analytical and arithmetical proprieties of two auto- morphic L-functions for the modular group, those of Hecke-Maass and Rankin- Selberg. From these, we obtain upper bounds for sums of the coe cients of auto- morphic cusp forms.
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Cheung, Ling-ling Mayella. „Media education in Hong Kong the underlying forces /“. Click to view the E-thesis via HKUTO, 2001. http://sunzi.lib.hku.hk/hkuto/record/B31972408.
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Nowland, Kevin John. „Properties of SU(2, 1) Hecke-Maass cusp forms and Eisenstein series“. The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543417235410827.
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Green, Nathan Eric. „Integral Traces of Weak Maass Forms of Genus Zero Odd Prime Level“. BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4161.
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Duke and Jenkins defined a family of linear maps from spaces of weakly holomorphic modular forms of negative integral weight and level 1 into spaces of weakly holomorphic modular forms of half integral weight and level 4 and showed that these lifts preserve the integrality of Fourier coefficients. We show that the generalization of these lifts to modular forms of genus 0 odd prime level also preserves the integrality of Fourier coefficients.
17
Ruslim, Franky. „Flow phenomena in cake washing driven by mass forces“. Göttingen Cuvillier, 2008. http://d-nb.info/99160492X/04.
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Rohloff, Marc [Verfasser], und Winfried [Akademischer Betreuer] Kohnen. „Construction of Harmonic Maass Forms in Small Weight / Marc Rohloff ; Betreuer: Winfried Kohnen“. Heidelberg : Universitätsbibliothek Heidelberg, 2017. http://d-nb.info/1180985877/34.
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Thompson, James K. (James Karl) 1972. „Two-ion control and polarization forces for precise mass comparisons“. Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17011.
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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2003.Includes bibliographical references (leaves 195-199).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
We have improved the ability to compare the masses of single ions by an order of magnitude to a fractional accuracy of [approx.] 7 x 10-12. This is done by simultaneously confining two ions in a Penning trap, and simultaneously comparing their cyclotron frequencies which are inversely proportional to the masses. The precision of the previous technique of alternately trapping the two ions was completely limited by magnetic field noise. Our new technique reduces the impact of both magnetic field and trap voltage noise by more than three orders of magnitude. We can measure and control the relative motion of the two ions in the Penning trap. We have developed a new mode coupling technique to park the ions on a shared magnetron orbit of diameter 1 mm but on opposite sides of the trap. We superpose on top of this magnetron motion the small cyclotron orbits of 150 [mu] diameter needed to simultaneously compare the cyclotron frequencies. The Coulomb interaction keeps the separation of the cyclotron guiding centers constant, thus minimizing cyclotron frequency perturbations due to ion-ion interactions. The ions spatially average magnetic field inhomogeneities and electrostatic imperfections at the magnetron frequency of 5 kHz. We have developed techniques to precisely measure and systematically vary the ion-ion separation. The control techniques are critical for exploring systematic errors.
(cont.) We discovered that we are sensitive to induced charge distributions within our molecular ions. As an ion moves on its cyclotron motion, it experiences a motional electric field which can polarize the ion. The induced charge distribution then leads to a systematic cyclotron frequency shift. Since the polarizability of the ion depends on its quantum state, we can monitor the quantum rotational state of a single CO+ molecule by measuring its cyclotron frequency. From the size of the observed cyclotron frequency shifts between rotational states, we determine the electric dipole moment of the CO+ to be 1.025(15) eao. This novel example of a polarization force has not been observed previously.
by James K. Thompson.
Ph.D.
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Cheung, Ling-ling Mayella, und 張玲玲. „Media education in Hong Kong: the underlying forces“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31972408.
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Gallant, Aaron T. „Penning trap mass measurements to test three-body forces in atomic nuclei“. Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55610.
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Recent theoretical studies have shown that three-nucleon forces are important for understand- ing neutron-rich nuclei, and for the formation of nuclear shell structure. In particular, theory can not reproduce the N = 28 magic number in ⁴⁸Ca using two-body interactions. This magic number is only reproduced with the inclusion of three-nucleon forces. Further along the calcium isotopic chain, the three-nucleon interaction predicts new magic numbers at N = 32 and 34, while calculations with phenomenological interactions predict a magic number at N = 32, but disagree on the magicity of N = 34. An other theoretical tool that has been under significant pressure since the advent of precision mass measurements is the isobaric multiplet mass equation, in which the binding energies of states in an isobaric multiplet should vary quadratically with the z-projection of the isospin. This is a consequence of the isospin dependent component of the nuclear Hamiltonian and Coulomb interactions. We test the predictions of phenomenological and three-nucleon interactions through mass measurements of ²⁰'²¹Mg, ⁵¹'⁵²Ca, and ⁵¹K with the TITAN Penning trap mass spectrometer. The measured mass excesses were ME(²⁰Mg) = 17477.7(18) keV, ME(²¹Mg) = 10903.85(74) keV, ME(⁵¹Ca) = 36339(23) keV, ME(⁵²Ca) = 34245(61) keV, and ME(⁵¹K) = 22516(13) keV. With the calcium and potassium mass measurements, we show that the calculations with three-nucleon forces are able to correctly predict the two-neutron separation energies. In the A = 20 and 21 isobaric multiplets, neither the phenomenological nor the three-nucleon based interactions are able to reproduce the measured behaviour.Science, Faculty of
Physics and Astronomy, Department of
Graduate
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Schwagenscheidt, Markus [Verfasser], Jan Hendrik [Akademischer Betreuer] Bruinier, Nils [Akademischer Betreuer] Scheithauer und Jens [Akademischer Betreuer] Funke. „Regularized Theta Lifts of Harmonic Maass Forms / Markus Schwagenscheidt ; Jan Hendrik Bruinier, Nils Scheithauer, Jens Funke“. Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2018. http://d-nb.info/1151638854/34.
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Rodrigues, Lívia Riberti 1988. „Análise de impurezas de formas farmacêuticas sólidas por MALDI Mass Spectrometry Imaging (MALDI-MSI)“. [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/312437.
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Orientador: Rodrigo Ramos CatharinoTexto em português e inglês
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas
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Resumo: Atualmente, as doenças cardiovasculares constituem uma das primeiras causas de mortes no Brasil e no mundo. Neste cenário, as estatinas constituem uma notável classe de medicamentos redutores de colesterol e têm sido associadas com uma expressiva diminuição da morbidade e mortalidade cardiovascular para pacientes em prevenção primária ou secundária da doença coronariana. Elas agem inibindo competitivamente a enzima HMG-CoA redutase, através da afinidade destes fármacos pelo sítio ativo da enzima. Esta enzima é responsável por catalisar a conversão do substrato HMG-CoA em mevalonato, um dos precursores do colesterol. A crescente necessidade e busca por medicamentos cada vez mais efetivos traz a preocupação na segurança destes produtos para seus usuários. Neste sentido, o conhecimento das impurezas e produtos de degradação torna-se necessário para garantir sua qualidade. Uma técnica muito utilizada para análises de impurezas e degradantes é a espectrometria de massas, pois é uma técnica sensível e seletiva e permite elucidar as estruturas químicas presentes na formulação do medicamento. Sendo assim, amostras de Atorvastatina cálcica foram analisadas pela técnica de espectrometria de massas por imagem (MALDI-MSI), permitindo a quantificação de impurezas do medicamento através da imagem da distribuição dessa impureza no comprimido. Dessa forma, é possível minimizar o preparo de amostra e obter um melhor conhecimento da formulação
Abstract: Currently, cardiovascular diseases constitute one of the first causes of deaths in Brazil and in the world. In this scenario, the statins are a notable class of medicines and cholesterol reducers have been associated with a significant reduction in cardiovascular morbidity and mortality for patients in primary or secondary prevention of coronary heart disease. They act by inhibiting competitively the enzyme HMG-CoA reductase, through the affinity of these drugs by the active site of the enzyme. This enzyme is responsible for catalyzing the conversion of HMG-CoA to mevalonate substrate, one of the precursors of cholesterol. The growing need and search for increasingly effective drugs brings the concern on the safety of these drugs for their users. In this sense, the knowledge of the impurities and degradation products becomes necessary to ensure their quality. A widely used technique for analysis of impurities and degrading is mass spectrometry, because it is a sensitive and selective technique and allows elucidating the chemical structures of the present formulation of the medicinal product. Thus, samples of Atorvastatin calcium were analyzed by the technique of mass spectrometry imaging (MALDI-MSI), which allows the quantification of impurities from the medicine through the image of the distribution of impurity in the tablet. That way, it is possible minimize sample preparation and get a better understanding of the formulation
Mestrado
Ciencias Biomedicas
Mestra em Ciências Médicas
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Hu, Weiwei. „Characterization of hydrodynamic forces and interfacial phenomena in cell culture processes“. Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1167409370.
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Alfes, Claudia [Verfasser], Jan Hendrik [Akademischer Betreuer] Bruinier, Ken [Akademischer Betreuer] Ono und Nils [Akademischer Betreuer] Scheithauer. „CM values and Fourier coefficients of harmonic Maass forms / Claudia Alfes. Betreuer: Jan Hendrik Bruinier ; Ken Ono ; Nils Scheithauer“. Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1112268723/34.
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Beck, Jonathan R. „Collision velocity dependence of products formed via surface induced dissociation /“. free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025601.
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Lin, Yongxiao. „Subconvex bounds for twists of GL(3) L-functions“. The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152416635614617.
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Radecke, Mark William. „Television and the church the electronic storyteller and the story-formed community /“. Theological Research Exchange Network (TREN), 1999. http://www.tren.com.
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Burdette, Catherine Bowers. „Big Hair and Big Egos: Texan Stereotypes in American Entertainment Media as Formed Through Television Viewing“. Thesis, University of North Texas, 2006. https://digital.library.unt.edu/ark:/67531/metadc5386/.
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This thesis explores the stereotypes of Texans portrayed in American entertainment media, and attempts to identify the reasons for both the existence, and persistence of these images. The study includes a brief history of Texas, and background information on the formulation of stereotypes. Cultivation theory is used to explain the process of stereotypes formed through television viewing. Content analysis of the responses from an on line survey involving 52 participants revealed that people outside the state of Texas have strong perceptions about Texans that are consistent with media representations. As the level of television viewership increased, so did the indelibility of the impressions. Those who watch more television were more likely to perceive the image of Texans as negative, and less likely to change their opinions of Texans after visiting the state.
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Engelbrecht, Alma Margaretha. „Modelling of mass transfer in packing materials with cellular automata“. Thesis, Link to the online version, 2008. http://hdl.handle.net/10019/1914.
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Morris, Ryan K. „Understanding Involuntary Job Loss Among Former Newspaper Staff Photographers“. Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4174.
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This study examines former newspaper photographers' experience with being laid-off from their staff positions. The purpose was to identify emerging themes within the context of involuntary job loss, job satisfaction, and occupational identity via interviews with 8 photojournalists who experienced the phenomenon of being laid-off. The newspaper industry has long been considered both the starting point for young and aspiring photojournalism careers and the most consistent and stable venue for an income. Yet recent changes in the media landscape, particularly economic stress on traditional business models and rapid adoption of digital technology sway the occupational future of photojournalism within newsrooms. The research method employed for this study includes in-depth interviews with a hermeneutical phenomenology approach focused on involuntary job loss, job satisfaction, and occupational identity.
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Molnar, Grant Steven. „The Arithmetic of Modular Grids“. BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6990.
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Let Mk(∞) (Gamma, nu) denote the space of weight k weakly holomorphic weight modular forms with poles only at the cusp (∞), and let widehat Mk(∞) (Gamma, nu) subseteq Mk(∞) (Gamma, nu) denote the space of weight k weakly holomorphic modular forms in Mk(∞) (Gamma, nu) which vanish at every cusp other than (∞). We construct canonical bases for these spaces in terms of Maass--Poincaré series, and show that the coefficients of these bases satisfy Zagier duality.
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Zambra, Ramos Rubén. „Transferencia de masa entre la desembocadura del Río Limarí, Bahía Tongoy y Bahía Barnes. Región de Coquimbo, Chile“. Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/170802.
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Este estudio es parte del proyecto FONDECYT N° 1120234 “Geodinámica y tendencia evolutiva del sistema litoral de la mega ensenada de Coquimbo: hacia una prognosis de amenazas naturales para escenarios de cambios ambientales endógenos y exógenos.Memoria para optar al título de Geógrafo
Se estudia la transferencia de masa entre la desembocadura del río Limarí, bahía Tongoy y bahía Barnes a través de la integración de unidades costeras, identificando las formas de acumulación, las relaciones morfosedimentológicas en los grupos de formas existentes y el transporte de masa en el litoral. Para la identificación de las formas de acumulación en las áreas de estudio, fue necesario realizar una descripción geomorfológica, identificando formas fluviales, fluviomarinas, terrazas marinas y formas eólicas. Para el análisis de las relaciones morfosedimentológicas se hizo necesario realizar análisis granulométrico según los procedimientos de distribución textural y morfoscópico de arenas, además de la mineralogía. Para el transporte de masa litoral se utilizó técnicas cualitativas a través del análisis multitemporal del ambiente de depositación, en un rango temporal de 27 años, analizando imágenes satelitales LandSat de los años 1987,1997, 2004 y 2011. Los resultados alcanzados denotan el fuerte control estructural y la orientación dominantemente oblicua de las bahías como factores que posibilitan la sedimentación de este sistema litoral, operando los principios de efecto de ensenada en éstas. Se considera que la fuente de abastecimiento de las bahías Tongoy y Barnes proviene de la cuenca del río Limarí, pero es necesario también considerar otros medios de transporte de sedimentos que no necesariamente tiene relación con el río ni su zona de descarga. El análisis multitemporal de las imágenes satelitales refleja que la transferencia de masa entre los diferentes sistemas se debe en el período reciente a condiciones que sobrepasen el umbral de transporte de sedimentos, esas condiciones se deben al aumento en la intensidad y torrencialidad de las precipitaciones. Las formas que reflejan cambios en los ambientes de depositación corresponden a flechas litorales y campos dunares las cuales son áreas sensibles a los aportes de sedimentos entre los sistemas.
It is studied that mass transfer between the Limarí river mouth, Tongoy bay and Barnes bay across of the integration of costal units, identifying accumulation forms, morphosedimentological, relations in the groups of existing forms and the mass transport in the coast. For identifying forms of accumulation in the areas of study, it was necessary to make a geomorphological description, identifying fluvial forms, river-marine, marine terraces and aeolian forms. For the analysis of morphosedimentological relations, it became necessary to perform granulometric analysis according to the procedures of textural distribution and sand morphocopic, including the mineralogy. For the transport of littoral mass we used qualitative techniques through the multitemporary analysis the depositional environment, a temporary range of 27 years, analyzing Landsat satellite images of the years 1987, 1997, 2004 and 2011. The results show the strong structural control and oblique orientation dominantly of the bays as factors that enable the sedimentation of the coastal system, operating the effect of cove principles in them. It is considered that the source of supply for Tongoy and Barnes bays comes from Limarí river basin, but it is also necessary to consider other transport means of sediments that does not necessarily have relation to the river or its discharge zone. The multi-temporal analysis of satellite images reflects that the mass transfer between the different systems ocurred in the recent period due to conditions that exceeded the threshold of sediment transport, these conditions are due to increase in the intensity and heavy rainfall. The forms that reflect changes in the deposition environments correspond to coastal arrows and dune fields which are sensitive areas to the contributions of sediments between systems.
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Rydevik, Axel. „Drug Metabolites Formed by Cunninghamella Fungi : Mass Spectrometric Characterization and Production for use in Doping Control“. Doctoral thesis, Uppsala universitet, Avdelningen för analytisk farmaceutisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-220906.
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This thesis describes the in vitro production of drug metabolites using fungi of the Cunninghamella species. The metabolites were characterized with mainly liquid chromatography-mass spectrometry using ion-trap and quadrupole-time-of-flight instruments. A fungal in vitro model has several advantages e.g., it is easily up-scaled and ethical problems associated with animal-based models are avoided. The metabolism of bupivacaine and the selective androgen receptor modulators (SARMs) S1, S4 and S24 by the fungi Cunninghamella elegans and Cunninghamella blakesleeana was investigated. The detected metabolites were compared with those formed in vitro and in vivo by human and horse and most phase I metabolites formed by mammals were also formed by the fungi. The higher levels of bupivacaine metabolites in the fungal samples allowed an extensive mass spectrometric structural characterization which shows that the fungi are relevant metabolic models. Glucuronides are important drug metabolites but they are difficult to synthesize. The discovery that the fungus Cunninghamella elegans formed large amounts of glucosides led to the idea that they could be used to form glucuronides. A new concept was developed where a fungal incubate containing a SARM S1 glucoside was mixed with the free radical tetramethylpiperidinyl-1-oxy (TEMPO), sodium bromide and sodium hypochlorite which produced a glucuronide. Isolation and characterization by nuclear magnetic resonance spectroscopy proved that the new method could produce glucuronides for use as reference material. An investigation of reactive metabolite formation of the drugs paracetamol, mefenamic acid and diclofenac by the fungus Cunninghamella elegans was performed. It was demonstrated for the first time that the fungus could produce glutathione, glutathione ethyl-ester, cysteine and N-acetylcysteine conjugates that are indicative of a preceding formation of reactive intermediates. A comparison with conjugates formed by human liver microsomes showed that both models formed identical metabolites. The presented investigations prove that Cunninghamella fungi are relevant drug metabolism models. They show that the fungi to a large extent forms the same metabolites as mammals and that they can produce metabolites for use as reference material in, e.g. doping control. It was also demonstrated that the fungal model can be used in the important assessment of drug toxicity.
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Koski, Jennifer Rose. „Radiatively induced ignition of PMMA in the presence of forced convection“. Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/15886.
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Vandermar, Scott R. „Assessing critical mass staff support in the Comptroller Office, Naval Air Forces Command, U.S. Pacific Fleet (COMNAVAIRPAC)“. Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA302933.
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Bennett, Carol L. „Activity level and body mass index: An analysis of the Canadian Forces Health and Lifestyle Information Survey“. Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26851.
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The increasing prevalence of overweight status and obesity among the general population is a major public health concern. There is debate surrounding the role of recreational physical activity in the prevention of weight gain at the population level.
This study examined the cross-sectional association between overweight status and obesity and recreational physical activity in a large representative sample of members of the Canadian Armed Forces (n = 4749) using polytomous logistic modelling. A systematic review of the literature looking at the longitudinal relationship between activity level and body mass was conducted and a health promotion intervention was developed.
After adjustment for several significant covariates, recreational energy expenditure was significantly and inversely associated with the prevalence of class I obesity compared to normal weight classification (OR 0.94, 95% CI 0.90-0.97), but was not significantly associated with the odds of having a BMI classified as either overweight or obese class II/III (OR 1.01, 95% CI 0.98-1.03; OR 0.93, 95% CI 0.85-1.02) versus having a BMI classified as normal.
This study suggests efforts to prevent overweight status and obesity at the population level could profitably address physical activity habits but need to consider the multi-factorial nature of the problem.
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Craig, Adriane B. „The role of public affairs in the military-media relationship /“. Search "ADA379993" in "Accession number" field, 2000. http://stinet.dtic.mil/str/tr4%5Ffields.html.
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Milliron, Craig W. „Shifting focus: assessing the role of U.S. Army Special Forces in the counterproliferation of weapons of mass destruction“. Thesis, Monterey, California: Naval Postgraduate School, 2014. http://hdl.handle.net/10945/42687.
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Approved for public release; distribution is unlimitedThe role of U.S. Army Special Forces (SF) in the counterproliferation of weapons of mass destruction (WMD) has been minimal in recent years. As globalization leads to increased ability of both states and non-state actors to acquire WMDs, the efforts of Army SF should increase accordingly. Focusing on nuclear weapons, this thesis argues that Army SF elements are ideally positioned to contribute to the counterproliferation mission through the use of the global special operations forces (SOF) network. Utilizing the regional expertise of Army SF and its network of foreign military and government contacts achieved through years of sustained relationships, it serves as an ideal opportunity for strengthening counterproliferation capabilities across the world. Rather than focusing exclusively on the interdiction of WMDs by specialized SOF elements, this thesis recommends shifting to Phase Zero—before WMDs are present—with a focus on building partner capacity to combat WMDs. It examines the adaptation of existing Army SF programs and authorities in order to focus them on WMD and compares this to Army SF augmenting existing non-SOF counterproliferation programs. Finally, it explains how these missions can build relationships within the global SOF network for future operations against proliferators and lead to improved international security.
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Simon, Jacob B., Philip J. Armitage, Rixin Li und Andrew N. Youdin. „THE MASS AND SIZE DISTRIBUTION OF PLANETESIMALS FORMED BY THE STREAMING INSTABILITY. I. THE ROLE OF SELF-GRAVITY“. IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621219.
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We study the formation of planetesimals in protoplanetary disks from the gravitational collapse of solid over-densities generated via the streaming instability. To carry out these studies, we implement and test a particle-mesh self-gravity module for the ATHENA code that enables the simulation of aerodynamically coupled systems of gas and collisionless self-gravitating solid particles. Upon employment of our algorithm to planetesimal formation simulations, we find that (when a direct comparison is possible) the ATHENA simulations yield predicted planetesimal properties that agree well with those found in prior work using different numerical techniques. In particular, the gravitational collapse of streaming-initiated clumps leads to an initial planetesimal mass function that is well-represented by a power law, dN / dM(p) proportional to M-p(-p), with p similar or equal to 1.6 +/- 0.1, which equates to a differential size distribution of dN / dR(p) proportional to R-p(-q), with q similar or equal to 2.8 +/- 0.1. We find no significant trends with resolution from a convergence study of up to 512(3) grid zones and N-par approximate to 1.5 x 10(8) particles. Likewise, the power-law slope appears indifferent to changes in the relative strength of self-gravity and tidal shear, and to the time when (for reasons of numerical economy) self-gravity is turned on, though the strength of these claims is limited by small number statistics. For a typically assumed radial distribution of minimum mass solar nebula solids (assumed here to have dimensionless stopping time tau = 0.3), our results support the hypothesis that bodies on the scale of large asteroids or Kuiper Belt Objects could have formed as the high-mass tail of a primordial planetesimal population.
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Gibbs, Sheila. „Ground reaction forces and control of centre of mass motion during gait : implications for intervention in cerebral palsy“. Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/f8110ed3-fa10-4580-959f-7ac0486e8d7a.
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A question which has arisen clinically is the inability to generate adequate vertical force during the second half of the stance phase in cerebral palsy gait. Neither the mechanism nor the consequences of this inability are understood. It implies that the centre of mass (CoM) is inadequately supported with the potential for collapse of the limb in single support. Normal walking is achieved by the sophisticated control of the neuromuscular and skeletal systems with the purpose of advancing the body with minimum energy expenditure. These control systems are affected by damage to the brain in children with cerebral palsy and result in a multitude of problems which affect their gait making it difficult to determine cause and effect. This study aimed to improve the understanding of the ground reaction forces and motion of the CoM. Objectives The principle objectives were to analyse the supporting forces of the CoM during gait in normal adults, children, and children with diplegic cerebral palsy, by examining the inter-relationships of the vertical and horizontal components of the ground reaction force with the vertical component of motion and temporal parameters of the CoM. Design The study of adults and children’s data was both prospective and retrospective. The study of cerebral palsy data was retrospective. A new software programme was developed to extract specific gait parameters from both normal and cerebral palsy gait patterns. A novel approach to analyse the interaction of motion and force data in normal walking was subsequently developed. Background In normal gait, the vertical component of the ground reaction force forms a double hump where both humps are equal in magnitude and greater than body weight. It is widely accepted that the first hump (FZ1) is associated with deceleration of the downward motion of the CoM as the foot “impacts” the ground and the second hump (FZ2) is the action of “push off” as the body is propelled upwards and forwards. Walking requires force contributions from both legs but traditionally computed three-dimensional (3D) gait analysis packages presents the force data with both legs superimposed, rather than sequentially in time. This gives the impression that there is no period of overlap of the forces and thus ignores the critically important period where the CoM is transferred from one leg to the other during double support. By changing the presentation to view it sequentially in time, plus superimposing the CoM kinematics onto the same scale allowed their interactions to be observed and objectively measured. Methods The kinematic and kinetic data of 53 normal adults, 33 normal children, and 57 diplegic cerebral palsy children were acquired for the study. A new gait cycle, based on CoM motion, was defined to allow analysis of the forces in relation to CoM motion. Software was developed to extract specified parameters from the gait data. Impulse calculations over specific periods (based on the vertical motion of the CoM) allowed analysis of the vertical force contribution of each leg to the vertical support of the CoM. Results The results showed that inadequate generation of vertical force in children with diplegic cerebral palsy was widespread. In approximately 40% of such children there was a reduced ability to generate an adequate FZ2, which resulted in a reduced ability to control of the descent velocity of the CoM. The mean reduction in descent velocity in cerebral palsy was only 54% compared to 86% in adults. Integration of the vertical force and motion of the CoM showed that FZ2 was associated with controlling the descent velocity of the CoM. This reverses the traditionally accepted concept of “impact” and is contrary to the belief that FZ2 is associated with ‘push off’. Conclusions and Relevance This study emphasises the importance of the role of the supporting leg in the second half of stance. Failure to generate an adequate FZ2, which is currently ignored in clinical practice, should be given priority in patient management. This new knowledge has significant implications from a clinical perspective, not only in diplegic cerebral palsy, but in pathologies such as amputees, spina-bifida, and other neuro-muscular conditions.
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Kimball, J. Allen. „America's two-front war : the American media assault on our center of gravity /“. Norfolk, Va. : Joint Forces Staff College, Joint Advanced Warfighting School, 2006. http://handle.dtic.mil/100.2/ADA451319.
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Thesis (M.S. in Joint Campaign Planning and Strategy)--Joint Forces Staff College, Joint Advanced Warfighting School, 2006."14 April 2006." Vita. "National Defense Univ Norfolk VA"--DTIC cover. Includes bibliographical references (p. 71-77). Also available via the Internet.
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Cavagni, Juliano. „Impacto da obesidade em diferentes formas de tratamento da doença periodontal destrutiva : resultados preliminares“. reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/138339.
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Objetivo: Comparar o efeito do tratamento periodontal não-cirúrgico associado ou não a antibiótico nos parâmetros clínicos periodontais em mulheres de peso normal ou obesas após 3 meses de acompanhamento. Materiais e Métodos: Foi realizado um ensaio clínico randomizado, controlado por placebo, em paralelo, incluindo 28 mulheres (35-55 anos) 15 de peso normal e 13 obesas. Fumantes, diabéticas e com sobrepeso não foram incluídas. As pacientes foram alocadas randomicamente para receber placebo ou metronidazol (400mg, 3x/dia durante 10 dias). Todos os dentes receberam raspagem e alisamento radicular subgengival durante o uso da medicação. Os parâmetros clínicos periodontais foram avaliados por um examinador treinado e calibrado no início e 3 meses após o tratamento. Resultados: Todos os parâmetros clínicos apresentaram melhora durante o período de acompanhamento. Placa visível foi maior nos grupos recebendo placebo quando comparado aos que receberam metronidazol; entretanto essa diferença não foi significativa (p=0,50). Sangramento gengival e sangramento à sondagem foram observados em aproximadamente 10% e 25% dos sítios respectivamente, não sendo observadas diferenças significativas entre os grupos (p=0,36 e 0,83, respectivamente). A redução na profundidade de sondagem variou entre 0,59 ± 0,17 e 1,03 ± 0,39mm e o ganho de inserção clínica variou entre 0,34 ± 0,37 e 0,52 ± 0,45mm. Não foram observadas diferenças estatisticamente significativas entre os grupos experimentais para estes parâmetros (p=0,09 e 0,76, respectivamente). Conclusão: Considerando as limitações desta análise preliminar, obesidade parece não afetar negativamente os resultados da terapia periodontal não-cirúrgica. Além disso, não foi observado benefício adicional com o uso do metronidazol.Aim: To compare the effect of nonsurgical periodontal therapy and systemic antibiotic on clinical parameters of normal weight and obese women after 3 months of follow-up. Material and Methods: A double-blind, placebo-controlled, parallel randomized clinical trial was conducted including 28 women (35-55 years-old, 15 normal weight/13 obese). Smokers, diabetics and overweighted women were not included. Patients were randomly allocated to receive placebo or metronidazole (400mg TID for 10 days). All teeth were scaled and root planned while the patients were taking the medication. Clinical measurements were carried out by a calibrated examiner at baseline and 3 months. Results: All clinical parameters improved over the follow-up period. Visible plaque was higher in groups receiving placebo than metronidazole; however, this difference was not significant (p=0.50). Gingival bleeding and bleeding on probing were observed, respectively, in less than ~10% and ~25% of sites and no significant differences were observed among groups (p=0.36 and 0.83, respectively). Probing depth reduction ranged between 0.59 ± 0.17 and 1.03 ± 0.39mm and clinical attachment gain ranged between 0.34 ± 0.37 and 0.52 ± 0.45mm. No significant differences were observed among experimental groups for these parameters (p=0.09 and 0.76, respectively). Conclusion: Within the limitations of these preliminary findings, obesity does not seem to affect negatively the clinical outcomes of nonsurgical periodontal therapy. Moreover, no additional benefit was observed with the use of metronidazole.
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Squillaci, Bianca. „Approaches to the detection of adducts formed via the covalent binding of reactive metabolites to proteins“. Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/approaches-to-the-detection-of-adducts-formed-via-the-covalent-binding-of-reactive-metabolites-to-proteins(3b4ccc97-ea77-40d1-bb2b-2c4e70a1424d).html.
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Metabolism of xenobiotic drug molecules can result in the formation of metabolites which are more chemically reactive than the parent drug from which they are derived. These reactive species have the potential to covalently modify biological macromolecules if they are not detoxified. The formation of drug-protein adducts carries a potential risk of clinical toxicities and idiosyncratic adverse drug reactions which can, in severe cases, result in hospitalisation and even death. Current methods for the evaluation of the risk for a drug to cause adverse drug reactions due to drug-protein binding rely on risk factors such as quantitative covalent binding value, structure, dose etc. The objective of this project was to develop methods for the detection of reactive metabolites directly bound to proteins, which could be used in future evaluations of the mechanisms of binding of candidates in drug development. Three compounds known to produce reactive metabolites, acetaminophen, SB-648969 and amodiaquine, were used as tool substrates. In vitro incubations with human liver microsomes and individual cytochrome P450 enzymes (as Supersomes ) were used to produce reactive metabolite species and binding with the incubation proteins evaluated. Analysis of the intact proteins, peptides generated via trypsin digestion of the incubation protein, and amino acids generated via digestion with pronase were evaluated using a combination of LC/MS and LC-MS/MS. Reactive metabolite trapping experiments with glutathione were used to provide information about the likely structure of the bound species and the specificity of binding, and were useful in the development of sensitive targeted precursor ion scanning and multiple reaction monitoring methods. [14C] radiolabelled acetaminophen and SB-649868 were used to assess the quantitative levels of binding (<5% modification of protein in both cases). Radiodetection using accelerator mass spectrometry (AMS) was used to evaluate the stoichiometry of binding and aid the identification of adducted peptides through retention time comparison. Chemical and electrochemical methods were utilised to produce stable solutions of N-acetyl-p-benzoquinone imine (NAPQI) and amodiaquine quinone imine (AQQI), reactive metabolites of acetaminophen and amodiaquine, respectively, which were bound to selected proteins and used as chromatographic and mass spectrometric standards. These methods were used to successfully identify an acetaminophen-modified peptide (T56) of cytochrome P450 CYP2E1. No modified proteins were observed for the SB-649868 incubations, however, examination of the AMS chromatograms for the incubations with acetaminophen and SB-649868 revealed a difference in the stoichiometry of binding, with one modified peptide observed with acetaminophen, and several for the incubations with SB-649868. The detection and identification of drug-protein adducts remains extremely challenging due to the low levels of any adducts observed, which can be exacerbated by binding on multiple sites of a protein; however this project has demonstrated that sensitive and selective LC/MS methods can be successfully developed to identify drug-protein adducts.
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Acirokop, Prudence. „Accountability for mass atrocities : the LRA conflict in Uganda“. Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/23898.
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This thesis addresses accountability for mass atrocities. It presents a case study of Uganda that has undergone a two-decade conflict between the Lord’s Resistance Army (LRA) insurgent group and the national army, the Uganda People’s Defence Armed Forces (UPDF). The government of Uganda has initiated various accountability measures that include international and domestic prosecutions, truth telling, reparations and traditional justice to address international crimes and other human rights violations committed during the conflict. The thesis in particular investigates how all these mechanisms could be used in a way that ensures that Uganda fulfils its international obligations and that the different measures complement each other. The thesis traces the background to the conflict that began in 1986 and explores the consequences of the conflict on the civilian population in Uganda. It alludes to its spread from Uganda to South Sudan and since 2008, to the Democratic Republic of Congo (DRC) and Central African Republic. It argues that the significant and continuous involvement of the government of Sudan from 1994 to 2005 internationalised the LRA conflict. It further finds that both the LRA and the UPDF perpetrated war crimes and crimes against humanity during the conflict. The thesis further discusses the international obligation of Uganda to prosecute, punish and extradite persons responsible for the commission of international crimes and to ensure remedies to victims of such crimes and other human rights violations. It finds that the lapse of Part II of the Amnesty Act that allowed for a ‘blanket amnesty’ leaves room for Uganda to fulfil its international obligations. The thesis further investigates the Agreement on Accountability and Reconciliation and its Annexure reached between the government of Uganda and the LRA in Juba that ushers in the various accountability pursuits in Uganda. It argues that the implementation and successes of the Agreement depends on the consultations, legislations, policies and the establishment and workings of the institutions envisaged that could lead to justice, truth and reparations in Uganda. The thesis finds that the different accountability measures that Uganda is pursuing correspond to the political, social and historical conditions in Uganda, in particular, decades of armed conflict and human rights violations with impunity of perpetrators. It concludes that the success of the accountability undertakings will largely depend on the high calibre of officials and staff of the different institutions and their ability to deal wisely with challenges that will inevitably arise. It further finds that a political will and commitment is essential to ensure adequate investment in technical, material and financial resources and that non-interference of the government in the work of the institutions will ensure success. It concludes that such a political will and commitment, a robust consultation with stakeholders including victim groups and the creation of alliances locally, nationally, regionally and internationally, Uganda’s accountability pursuits will lead to the desired justice, truth and reparations.Thesis (LLD)--University of Pretoria, 2012.
Centre for Human Rights
unrestricted
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Dykes, Alan Philip. „Hydrological controls on shallow mass movements and characteristic slope forms in the tropical rainforest of Temburong District, Brunei“. Thesis, King's College London (University of London), 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364787.
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Saad, Hassanin Alshaimaa [Verfasser], Norbert [Akademischer Betreuer] Seehafer, Gottfried [Gutachter] Mann und Terry [Gutachter] Forbes. „Dynamic coronal mass ejection process and magnetic reconnection / Alshaimaa Saad Hassanin ; Gutachter: Gottfried Mann, Terry Forbes ; Betreuer: Norbert Seehafer“. Potsdam : Universität Potsdam, 2018. http://d-nb.info/1218404116/34.
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Díaz, Ameneiro Purificación. „Pateando el litoral : la construcción del territorio del turismo de masas“. Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/373217.
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Esta tesis se formula desde la hipótesis de que el litoral es un territorio singular con características propias que propician la localización de usos concretos y el desarrollo de modelos de ocupación territorial específicos que, como tales, deberían ser estudiados y considerados dentro de la
ordenación territorial.
El análisis del crecimiento de población y vivienda en las provincias costeras desde inicios del siglo XX permite cuantificar la incidencia que el turismo ha tenido en la transformación del territorio litoral. La mapificación de las transformaciones urbanas ocurridas a partir de medidos del
siglo XX en la franja costera que va desde Portbou a Ayamonte permite caracterizar las formas de crecimiento del litoral. A partir de estas formas se identifican los patrones de ocupación litorales característicos de una nueva ciudad difusa construida de forma masiva sobre el borde del mar,
por y para la actividad turística, una actividad generadora de urbanidad con unas condiciones diferentes a la de la ciudad tradicionalThis thesis is founded upon the hypothesis that the coastline is a unique territory with particular features that lead to specific uses and to the development of specific land-use models, which, given this specificity, should be viewed within the framework of spatial planning. The analysis of population and housing growth in Spanish coastal provinces since the early twentieth century Purificación permits the quantifying of tourism’s impact upon the transformation of the coastal territory. The mapping of urban transformations in the coastal strip, from Portbou to Ayamonte, during the second half of the twentieth century permits the characterization of the forms of coastal growth. And from these forms of growth it is possible to identify the characteristic occupation patterns of a new form of dispersed coastal city constructed on a massive scale on the coastline, by and for tourism; it as an activity that creates a form of urbanism with conditions vastly different than those of the traditional city.
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Gao, Congwei. „Numerical study of mass and momentum exchanges between side asin and forced oscillating main flow“. Thesis, McGill University, 2014. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=123274.
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The exchanges of mass and momentum between coastal current and its embayment influence the transport and distribution of pollutant and sediment in the current. In this study, a numerical model of forced oscillating flow was developed to study the exchange between the recirculating flow in a side basin and the main-channel flow. The numerical simulations were carried out based on the shallow water equations, using a staggered grid for minimal intervention. Time integration of the shallow water equations was accomplished using the fourth-order Runge-Kutta scheme. A fifth-order finite volume approximation known as weighted essentially non-oscillatory (WENO) scheme was employed for the spatial interpolation. To visualize the mass exchanges and determine the mass exchange coefficient, tracer mass were introduced into the square basin. The flow in the main channel is forced to oscillate. The mass exchange rate as a fraction of the total mass within the basin is shown to be a first-order reaction process. A mass exchange coefficient is then determined for the first-order process. The momentum exchange as a resistance to the main flow is obtained by integrating the momentum flux at the interface along the opening of the side basin to the main flow.Different flow patterns in the basin are identified relating to the amplitude and the period of the forced oscillations. The regular recirculating flow are dependent on the oscillation amplitude but not on the forcing period. At selected periods of forcing however, the flow is excited leading to self-sustained oscillations in the basin. Two kinds of excitations of different feedback mechanism have been identified. The excitation of the first kind occurs when the forced oscillation frequency matches the fundamental and harmonic mode frequencies of the gravity free-surface waves in the basin. The excitation of the second kind is due to vorticity-wave synchronization with the forced oscillation frequency. The excitation of the free-surface waves in the basin does not promote the mass exchange. On the contrary and in contradiction to intuition, it suppresses the circulation inside the basin and thereby leading to a substantial decrease in mass exchange rate between the basin and the main flow. The momentum exchange on the other hand is enormously enhanced by the excitation of the free-surface waves in the basin.Le processus d'échange de masse et la quantité de mouvement entre le courant côtier et son embouchure influence le transport et la distribution de polluants et de de sédiments dans le courant. Dans cette étude, un modèle numérique de flux principal oscillant force a été développé pour étudier l'échange entre le flux de recirculation dans un sous-bassin d'extrémité et son flux principal. Les simulations numériques ont été élaborées basées sur les équations de flux en eau peu profonde dans un repère orthonormé. L'intégration du temps des équations de flux en eau peu profonde a été accomplie en utilisant la programmation du quatrième degré de Runge-Kutta. Un volume d'éléments finis de cinquième degré connu sous le nom de régime pondéré essentiellement non oscillatoire (en anglais WENO) a été utilisé pour l'interpolation spatiale.Pour visualiser les échanges de masse et déterminer le coefficient d'échange de masse, un traceur a été introduit dans le bassin de forme carré. L'écoulement dans le flux principal est forcé d'osciller. Le taux d'échange de masse en fonction de la masse totale dans le bassin est présenté en tant que procédé de réaction de premier ordre. Un coefficient d'échange de masse est ensuite déterminé pour ce procédé de premier ordre. L'échange de moment en tant que résistance au flux principal est obtenu par intégration du flux de la quantité de mouvement au niveau de l'interface sur l'ouverture du sous-bassin d'extrémité.Différents caractéristiques d'écoulement dans le bassin sont identifiés étant reliés à l'amplitude et à la période de forces oscillatoires. Les flux de recirculation réguliers sont dépendants de la force d'amplitude mais non à la période de la force oscillatoire. Cependant, au niveau de certaines périodes de force sélectionnées, l'écoulement est excité afin d'aboutir à des oscillations durables dans le bassin. Deux types d'excitation de différents mécanismes de feed-backs ont été identifiés. L'excitation du premier type survient quand la fréquence de l'oscillation forcée égale les fréquences des modes fondamental et harmonique associés à la force oscillatoire. L'excitation du second type est due à la synchronisation du tourbillon d'onde avec la fréquence de l'onde oscillatoire. L'excitation des ondes à surface libre dans le bassin ne garantit pas l'échange de masse. Dans le cas contraire et dans la contradiction par rapport à l'intuition, ceci supprime la circulation dans la le bassin et ainsi conduit à une diminution importante dans le taux d'échange de masse entre le bassin et l'écoulement principal. De l'autre côté, l'échange de la quantité de mouvement est énormément amélioré par l'excitation des ondes à surface libre dans le bassin.
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Cami, Sonila. „Effects of Body Mass Index and Walking Speed in Gait Biomechanics of Young Adult Males“. Scholarly Repository, 2007. http://scholarlyrepository.miami.edu/oa_theses/86.
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Gait biomechanics of forty male subjects was evaluated at normal and fast walking speeds. The forty subjects composed four groups based on their body mass index, with ten subjects in each of the groups: underweight, normal weight, overweight and obese. To our knowledge this is the first comprehensive 3-dimensional kinetic and kinematic gait analysis of all four groups based on body mass index. The obese subjects walked with significantly slower gait speed by taking shorter steps and strides, while having significantly higher step widths and longer gait cycle times than the other subjects. The obese subjects spent significantly less time in single support and more time in double support than their non-obese counterparts. These adjustments in temporal characteristics for the obese participants may be as a result of the gait compensation for the additional body weight in order to give them the most efficient, stable and balanced walking ability. Body mass index affected significantly the forces and moments at the ankle, knee and hip in the medial-lateral plane while speed effects were more prominent in the sagittal and transverse planes. These results suggest that an increase in the body weight would affect the gait stability while increasing the speed will affect the gait progression. Contrary to most researchers beliefs that an increase of the body weight would increase the forces and moments of the knee in all three planes, this study was able to prove that the actual forces and moments in the medial-lateral plane for the knee joint decrease while the ones in the sagittal plane increase. On the other hand, the hip joint in the medial-lateral plane displays the highest forces and moment for the obese subjects. These results are indicative of a gait compensation related to increasing body weight in the medial-lateral compartment of the lower extremity joints. Recommendations for further studies and follow up experiments are enclosed.