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Schnorr, Randolf. "Die Gemeinschaft nach Bruchteilen : ([section][section] 741-758 BGB) /." Tübingen : Mohr Siebeck, 2004. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=012799586&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Hall, Courtney D., Steven L. Wolf, and Z. Kapasi. "Section 7: Geriatrics." Digital Commons @ East Tennessee State University, 2013. https://dc.etsu.edu/etsu-works/466.
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Book Summary: The 4th Edition of the gold standard of rehabilitation resources is now in full color and thoroughly revised and updated to reflect the art and science of practice today!
A compendium of frequently used, but rarely memorized information organized for easy reference, it covers an extraordinary breadth of topics—from the full range of basic scientific information (neuroanatomy and clinical neurology, osteology and clinical orthopedics, general anatomy, cardiac and pulmonary anatomy) to the treatments and methods used in modern rehabilitation practice.
With its outcome and evidence-based focus and several expert contributors, this text is a must for PT’s at any stage in their career.
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Lamo, Ana Rosa. "Cross section distribution dynamics." Thesis, London School of Economics and Political Science (University of London), 1996. http://etheses.lse.ac.uk/1448/.
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This thesis contains four chapters. Each chapter constitutes an empirical exercise in which I apply econometric ideas on studying the dynamics of large cross sections of data (Random Fields). Three of them concern the empirics of convergence and the fourth analyses business cycle fluctuations. The first, "Notes on Convergence Empirics: Some Calculations for Spanish Regions," describes the econometric methods for studying the dynamics of the distributions and how to characterise convergence in this framework, explains why the standard cross-section regression analysis is misleading when testing for convergence and then performs some calculations for regions in Spain. The second chapter, "Dynamics of the Income Distribution Across OECD Countries", considers its baseline hypotheses to be those generated by the Solow growth model. Using sequential conditioning, it studies whether the convergence hypothesis implications can be shown to hold for the OECD economies. It finds that neither absolute nor conditional convergence, in the sense of economies approaching the OECD average, has taken place. The third chapter, "Cross Sectional Firm Dynamics: Theory and Empirical Results", extends ideas of distribution dynamics to a discrete choice setting, and extends the reasoning of Galton's Fallacy to the logit model. It provides evidence of the tendency of firm sizes to converge for the US chemicals sector by analysing dynamically evolving cross-section distributions. Finally, the fourth chapter, "Unemployment in Europe and Regional Labour Fluctuations" applies distribution dynamics ideas to a business cycle setting. It analyses the dynamics of employment for 51 European regions from 1960 to 1990, addressing the issue of whether regional shocks have aggregate effects on unemployment or the opposite. It uses a model for non-stationary evolving distributions to identify idiosyncratic and aggregate disturbances.
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Hillan, Edith M. "Outcomes of Caesarean section." Thesis, University of Glasgow, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257964.
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Johnson, Daniel B. (Daniel Bryant). "Building, landscape and section." Thesis, Massachusetts Institute of Technology, 1992. http://hdl.handle.net/1721.1/67406.
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Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1992.Includes bibliographical references (p. 96-97).
All buildings have in their section a relationship to the landscape on which they are sited. Therefore we as inhabitants of these buildings may or may not have a relationship with the landscape. It is the supposition of this thesis that the relationship is important, understandable, and assimilable. Selected buildings and their landscapes were examined to reveal some of these relationships. A notebook where observations, processes, thoughts and works were recorded, was used as a method of inquiry. Finally a design which draws on the assimilated knowledge of the building/landscape relationship is put forward.
by Daniel B. Johnson.
M.Arch.
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WANG, YONGBING. "STRUCTURAL BEHAVIOR AND DESIGN OF TWO CUSTOM ALUMINUM EXTRUDED SHAPES IN CUSTOM UNITIZED CURTAIN WALL SYSTEMS." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1147722350.
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Riccio, Ciro. "Mesure du flux et de la section efficace des antineutrinos dans le détecteur proche de l'expérience T2K." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS013/document.
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T2K (Tokai to Kamioka) est une expérience d’oscillation de neutrinos muoniques sur une longue ligne de base, située au Japon. Elle est conçue pour mesurer le changement de saveur des neutrinos d’un faisceau produit à l’aide d’un accélérateur au laboratoire JPARC de Tokai. Les détecteurs proche et lointain sont placés légèrement hors axe par rapport au faisceau. Depuis la découverte en 2013 de l’apparition de neutrinos électroniques, T2K a inversé la polarité des cornes magnétiques intervenant dans la production du faisceau, afin de produire un faisceau d’antineutrinos et d’augmenter la sensibilité de l’expérience à la violation de la charge-parité dans le secteur leptonique. Le faisceau produit est alors dominé par les antineutrinos muoniques avec une composante mesurable de neutrinos muoniques. L’analyse simultanée, dans les données prises avec le faisceau de neutrinos et le faisceau d’antineutrinos, des interactions par courant chargé dans le détecteur proche ND280, permet de réduire l’impact sur les analyses d’oscillation des incertitudes liées au flux de (anti)neutrinos et à leur section efficace d’interaction. Les données de ND280 permettent également de mesurer les sections efficaces d’interaction des antineutrinos d’énergie proche de 600 MeV. La bonne connaissance du processus d’interaction des (anti)neutrinos avec les noyaux atomiques est cruciale pour interpréter les résultats de l’expérience en termes d’oscillations. De nombreux modèles théoriques ont été développés pour décrire les effets nucléaires lors des interactions des (anti)neutrinos, mais une vison globale cohérente n’a pas encore émergé. En particulier, des mesures variées de section efficace d’interaction par courant chargé sans production de pion dans l’état final suggèrent la possibilité pour les neutrinos d’interagir avec des paires de nucléons corrélés, entrainant l’éjection de plus d’un nucleon hors du noyau (composante dite “multi-nucléon”). Divers modèles ont proposé des estimations différentes de ce processus et une mesure précise et sans ambiguité n’est pas encore disponible. Ce travail de thèse se concentre sur trois études. La première détaille la sélection des interactions de neutrinos muoniques par courant chargé dans le détecteur proche hors axe. Dans un premier temps l’échantillon de données était divisé en deux selon le nombre de traces chargées de l’événement, puis l’accumulation de davantage de données a permis la séparation de l’échantillon en trois lots selon le contenu en pions de l’événement. La seconde étude consiste en la mesure simultanée de la section efficace d’interaction des neutrinos et des antineutrinos muoniques par courant chargé, conduisant à un état final sans pion mesuré dans le détecteur ND280. Ces sections efficaces sont extraites en fonction de l’impulsion et de l’angle du muon issu de l’interaction, permettant ainsi d’évaluer la somme, la différence et l’asymétrie entre les sections efficaces des neutrinos et des antineutrinos. La somme permet d’isoler la composante d’interférence vecteur-axial de la section efficace, et la différence est sensible à la composante multi-nucléons. L’asymétrie permet d’estimer directement le biais éventuel sur la mesure de la phase de violation de CP dû à la modélisation des sections efficaces, dans l’analyse d’oscillation de neutrinos. La dernière partie de la thèse étudie la proposition d’utiliser la technologie dite de multi-PMT pour le detector Hyper-Kamiokande, version à plus grande échelle de Super-Kamiokande, ainsi que la possibilité d’étudier le flux de neutrinos avec un détecteur basé sur le rayonnement Cherenkov dans l’eau, et placé à environ 2 km de l’origine du faisceau de neutrinos. Un multi-PMT est une sphère de plastique contenant 26 tubes photomultiplicateurs, qui pourrait améliorer l’efficacité des futurs détecteurs basés sur le rayonnement Cherenkov dans l’eauT2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment installed in Japan and designed to measure neutrino flavor oscillation using an off-axis neutrino beam produced at the J-PARC accelerator facility in Tokai. Since its discovery of electron neutrino appearance in 2013, T2K has switched its beam magnet polarities to run in antineutrino beam mode in order to enhance its sensitivity to the charge-parity violation in the leptonic sector. The beam is dominated by muon antineutrinos, but it also contains a sizable contamination from muon neutrinos. The analysis of both neutrino and antineutrino charged-current interactions in the off-axis near detector ND280, provides a significant reduction of the flux prediction and cross-section modeling systematic uncertainties in the oscillation analysis. ND280 data also gives us the opportunity to measure antineutrinos cross-sections at the energy around 600 MeV. Information on (anti)neutrino scattering is vital for the interpretation of neutrino oscillation. Many theoretical models have been developed to describe the nuclear effects in (anti)neutrino scattering, but a consistent picture has yet to emerge. In particular, various measurements of charged-current cross-section without production of pions in the final state have suggested the presence of another channel where neutrinos interact with pairs of correlated nucleons and more than one nucleon is knocked-out from the nucleus (multi-nucleon component). Various models have proposed different estimations of such process and a precise and unambiguous measurement is not yet available. This thesis work is focused on three different arguments. First the selections of CC interactions of muon neutrinos in antineutrino beam in the off-axis near detector. In a first iteration this sample has been divided into two sub-sample based on the track multiplicity, then with more statistic a separation into three sub-samples based on the pion content in each event was possible. Then on the simultaneous measurement of the double-differential muon neutrino and antineutrino charged-current cross-section without pions in the final state using the off-axis near detector. The neutrino and antineutrino cross-sections will be simultaneously extracted as a function of muon momentum and angle with a likelihood fit, including proper estimation of the correlations, allowing the evaluation of the sum, difference and asymmetry between the two cross-sections. The sum isolates the axial-vector interference term of the cross-section, and the difference enhances the sensitivity to the multinucleon component. The asymmetry is a direct estimation on any possible bias due to mismodeling of (anti)neutrino interactions on the measurement of the CP violation phase in neutrino oscillation. The last topic concerns the proposal of the multi-PMT technology as detector for Hyper-Kamiokande, the upgrade of Super-Kamiokande, and the intermediate water v Cherenkov proposed to study the neutrino flux at ~2 $km$ from the beam production point. A multi-PMT is a plastic sphere filled with 26 photomultiplier tube that could improve the efficiency of the Cherenkov detectors foreseen in the future
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Bérézowsky, Isabelle. "Ansprüche des Arzneimittelgeschädigten gegen den pharmazeutischen Unternehmer nach [section][section] 84, 84a AMG /." Aachen : Shaker, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015408734&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Askew, Claire Louise. "The axe of the house (Section A) ; 'Entangled in biographical circumstances' (Section B)." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/9449.
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The axe of the house is a collection of poetry written and collated over three and a half years. The vast majority of the poems are about women: these are women’s voices usually recounting specifically female experiences. Many of these female poems were informed by the confessional mode, as appropriated and transmuted by the contemporary women writers I read and studied. The collection begins with confessions of my own in poems like “Anne Askew’s ashes” and “Jean,” and then moves on to include love poems like “Prayer” and “Gulls,” which are also at least partially autobiographical. Also confessional, but not autobiographical, are the poems at the centre of this collection. These are poems in which women from various different walks of life speak about their inner lives. Some of these women, like the speakers of “Hate mail” and “Silver Ghost,” are my own creation, while others, like “Mrs Rochester,” are borrowed from elsewhere. These poems examine intimate relationships from various angles: marriages, one night stands and vicious rivalries are all explored via a first person narrative. Body image is also a common theme. There are a few poems which are more overtly political, delivering feminist messages about the ways patriarchal society portrays and often ostracises women. “Harpies,” for example, looks at women who are seen to have no sexual worth, while “The picture in your mind when you speak of whores” concerns women whose only perceived worth is sexual, dismissing the various marginalising stereotypes that exist around sex workers. The collection moves farthest away from its examination of the female experience in the poems towards the end. However, these poems form a travelogue in which privilege of various kinds is examined and critiqued. Poems like “Witch” and “Belongings” are still concerned with the lives of women, while “Big heat” uses a female narrator to examine the more recognised privileges of wealth and mobility. These ideas recur in poems like “Barcelona diptych” and “Highway: Skagit County, WA,” but the poems that round off the collection are also attempts to capture a sense of place and space. Throughout this work, there are poems that are particularly interested in liminal space: several of the poems in the collection, including “Poltergeistrix” and “The women” look at the hours and days immediately after death. The space between travel destinations is also liminal, and these final poems attempt to make sense of it – finally succeeding with “Hydra,” which delivers a sense of acceptance and advocates living ‘in the moment’. The critical section, “Entangled in biographical circumstances,” looks afresh at the female confessional poem, most commonly associated with Sylvia Plath, Anne Sexton and Adrienne Rich. With reference to the works of these literary foremothers, I focus on the ways in which a new generation of women poets has been inspired to adopt this mode. As well as noting the often hostile response of male critics to confessional work by female writers, I examine the very different ways in which Sharon Olds, Sapphire and Liz Lochhead work in the confessional tradition to produce poetry that speaks candidly about the inner lives of women. I also discuss the ways in which the work of these three poets has influenced and shaped my own poetry.
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Hartmann, Henning Karl. "Grenzen der Befugnisse des Insolvenzverwalters bei der Gesamtanspruchsliquidation nach [section][section] 92, 93 InsO /." München : von Göler, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?id=2850186&prov=M&dokv̲ar=1&doke̲xt=htm.
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Noak, Torsten. "Drittzueignung und 6. Strafrechtsreformgesetz : zur Neuregelung der [section][section] 242, 246 und 249 StGB /." Baden-Baden : Nomos-Verl.-Ges, 1999. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=008779351&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Benito, Miguel. "Better consistency of the UDC system moving Medicine from section 61 to section 4." UDC Consortium, 2007. http://hdl.handle.net/10150/105244.
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Over 45 years ago it was decided to move the class 4 for Language to the section 8 together with Literature. Since then class 4 has not been used. A recent master thesis at the school of librarianship in Boras , â UDC, A Proposal to Basic Class 4â by Fredrik Hultqvist, (Magisteruppsats; 2006:39) proved the possibility of moving Medicine from the
section 61 to the empty class 4. This is not a new idea, but has never been implemented. Reasons are given to support this proposal, based on the need to find a better collocation of the subject while at the same time providing a solution for shorter notations.
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Krug, Steffen. "Large section ceramic injection moulding." Thesis, Queen Mary, University of London, 2000. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1852.
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Ceramic injection moulding is already established as a production technique for complex shaped ceramic components. However the process is limited to thin section mouldings generally not exceeding a wall thickness of 10 mm. The global objective of this work is to describe and understand the aetiology of defects which preferentially appear in thick injection moulded ceramics, and to find ways to overcome these problems. The following stages are examined mould-filling, solidification, binder removal and sintering. Different moulding techniques; conventional moulding, modulated pressure moulding, insulated sprue moulding and low hold pressure moulding were applied. Moulding thicknessw as systematicallyv aried (15,20,25, and 35 mm).. Hold pressures and times were closely controlled and found to be decisive processing parameters for defect creation. The use of insulated sprue moulding prevented void formation in 25 nun thick mouldings and the application of low and constant hold pressures (>5 MPa) led to a reduction of residuals tressesin the mouldings. An intensive study was carried out on the binder removal stage in which the catalytic removal of the polyacetal binder enabled removal of the binder from sections of 35 nun thickness. The reaction and transport kinetics during binder removal were studied and close observations were made out on various defects which could appear during interrupted binder removal. Differential shrinkage of the ceramic components during sintering was studied and could be tracked back to flow-induced particle alignment during mould filling. The sintering behaviour of the alumina feedstock used in this study was compared with an equiaxed zirconia powder injection moulding suspension. The phenomenon of jetting in large section mouldings and the creation of spherulites during solidification of the polymer were found to influence moulding structure.
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Tosetti, Elisa. "Cross section dependence in panels." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611351.
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Li, Xiang. "Compressive Radar Cross Section Computation." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40073.
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Compressive Sensing (CS) is a novel signal-processing paradigm that allows sampling of sparse or compressible signals at lower than Nyquist rate. The past decade has seen substantial research on imaging applications using compressive sensing. In this thesis, CS is combined with the commercial electromagnetic (EM) simulation software newFASANT to improve its efficiency in solving EM scattering problems such as Radar Cross Section (RCS) of complex targets at GHz frequencies. This thesis proposes a CS-RCS approach that allows efficient and accurate recovery of under-sampled RCSs measured from a random set of incident angles using an accelerated iterative soft thresh-holding reconstruction algorithm. The RCS results of a generic missile and a Canadian KingAir aircraft model simulated using Physical Optics (PO) as the EM solver at various frequencies and angular resolutions demonstrate good efficiency and accuracy of the proposed method.
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Scarbrough, William T. "NACA four-digit airfoil section generation using cubic parametric curve segments and the golden section /." Online version of thesis, 1992. http://hdl.handle.net/1850/11033.
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Milković, Lilian Maria. "Das digitale Zeitalter - Segen oder Fluch für die wissenschaftliche Informationsversorgung? : Verfassungsrechtliche und europarechtliche Bewertung der Schrankenbestimmungen [section] 52a UrhG, sowie [section][section] 52b und 53a UrhGE." kostenfrei, 2008. http://www.opus-bayern.de/uni-wuerzburg/volltexte/2008/2892/.
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Laub, Malte. "Die Risikoallokation bei verzögerten Überweisungen : eine rechtsdogmatische und rechtsökonomische Untersuchung der [section][section] 676a ff. BGB." Hamburg Kovač, 2009. http://www.verlagdrkovac.de/978-3-8300-4626-4.htm.
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Kunkel, Felix Robert Eberhard. "Bloßer Verkehrsschutz statt widerspruchsfreier Dogmatik? : zur Entstehung, Begründung und Entwicklung der [section][section]932-935 BGB /." Frankfurt am Main [u.a.] : Lang, 2009. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=017556633&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Cooke, Gordon Michael Eyre. "The structural response of steel I-section members subjected to elevated temperature gradients across the section." Thesis, City University London, 1987. http://openaccess.city.ac.uk/8337/.
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This work is primarily concerned with the structural response of steel I-section beams and columns heated along one flange to the elevated temperatures likely to be reached in real fires in buildings or ISO 834 fire resistance tests. Experiments have employed nominally full size models, heated using high powered, ceramic insulated, electrical heating elements at temperatures up to 1000°C. The experiments have been conducted on: a non-loaded, simply supported beam; a design-loaded, simply supported beam; a non-loaded 2-span beam on simple supports; and design-loaded, pin-ended columns free to bow about both axes. Load, displacement and temperature data have been recorded and analysed for a number of heating, imposed loading and restraint conditions likely to be met in practice. One of the experiments simulates the loading and restraint conditions used in the BS 1476 : Part 8 : 1972 standard fire resistance test on beams. The data may be used as benchmarks for the validation of analytical studies. Simple theories f or the bowing displacements of non-loaded members having temperature gradients across the section have been derived and validated not only with the model experiments but also with data from full scale compartment fires in a collaborative programme of research undertaken by the British Steel Corporation Swinden Laboratories and Fire Research Station. The practical application of the theory has been demonstrated in other ways. A finite element method, using the PP.FEC program, has also been used which takes account of phase transformation - the sudden temporary shrinkage in steel as it is raised above a temperature of 720°C - but it has not proved possible to use PAFEC for plasticity analyses of beams or columns at elevated temperatures. The phenomenon of' reverse direction bowing has been observed In the model column tests and this confirms observations made by other workers.
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NOVO, MARCELA SILVA. "ARBITRARY CROSS SECTION WAVEGUIDES: ANALYSIS OF MODAL FIELDS AND OF DISCONTINUITIES BETWEEN ARBITRARY CROSS SECTION WAVEGUIDES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2003. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3781@1.
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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIORNo presente trabalho o método de Rayleigh-Ritz é utilizado na determinação dos campos modais e dos números de onda de corte em guias de onda de seção arbitrária. Inicialmente, o método é aplicado com funções de base polinomiais, sendo a seção transversal do guia aproximada por um polígono convexo. Este tipo de função limitou o número de modos que podem ser calculados, uma vez que polinômios de grau alto geram instabilidades computacionais e overflow. Utilizando a mesma metodologia, os campos modais em guias de onda superquadráticos são analisados. Entretanto, as funções de base polinomiais são substituídas por funções trigonométricas, produzindo um modelo numérico capaz de computar um grande número de modos em um tempo de execução razoável. Os guias superquadráticos constituem uma classe de guias uniformes, incluindo guias circulares, elípticos, quase retangulares e outros de seções intermediárias. Conseqüentemente, eles são úteis na construção de diversos dispositivos em guias de onda, incluindo transições de diferentes seções, tais como circular para elíptica e circular para retangular. O método do casamento de modos é aplicado na determinação da matriz de espalhamento de descontinuidades entre guias superquadráticos. Diversas aplicações numéricas são apresentadas e comparadas com resultados obtidos através de outras técnicas.
In the present work, the modal fields and cutoff wavenumbers of arbitrary cross section waveguides are determined using the Rayleigh-Ritz method. Initially, the method is applied to waveguides with cross section approximated by a convex polygon. Polynomial basis functions are used. Such basis functions limit the number of modes that can be computed, since polynomials of high degree generate computer instabilities and overflow. Using the same methodology, the modal fields of superquadric waveguides are analyzed. Polynomial basis functions are replaced by trigonometric functions, however, producing an efficient numerical model capable of computing a large number of modes with a reasonable computer time. Superquadric waveguides constitute a class of uniform waveguides that include circular, elliptical, almost rectangular waveguides and a series of intermediate cross section waveguides. As a consequence they are quite useful in the construction of several devices, including transitions between waveguides of different cross sections, such as circular to elliptical and circular to rectangular. The mode matching technique is applied to the determination of the scattering matrix of discontinuities between superquadric waveguides. Several numerical applications are presented and compared to results obtained from other techniques.
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Khador, Majd. "Cyclic behaviour of external diaphragm joint between steel I-section beam and circular hollow section column." Thesis, University of Warwick, 2015. http://wrap.warwick.ac.uk/66903/.
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Tubular columns own many structural and architectural advantages that, in certain cases, make them more favourable than open-section columns in steel moment-resisting frames. These advantages are sometimes underexploited due to the relative lack of design guidance on their moment joints to open-section beams, in particular on semi-rigid joints with special detailing for seismic actions. Different configurations of I-beam to tubular column joints have been investigated in the past, including through, internal and external diaphragm joints. This project investigates experimentally the cyclic behaviour of an external diaphragm joint between a steel I-beam and a circular hollow section column. The proposed joint includes two diaphragm plates (DPs) welded to the outer circumference of the column and bolted to the I-beam flanges with two tapered cover plates (TCPs). A web stub is welded to the column face and bolted to the I-beam web. Full-scale laboratory experiments were conducted to investigate the hysteretic response and energy dissipative performance of the proposed joint under cyclic loading. TCPs were integrated in the joint to act as replaceable sacrificial components that dissipate most of the energy whilst the rest of the joint components remain elastic to minimise the post-seismic repair. The test specimens were identical except their TCPs that had the same geometry but differed in steel grade, size of bolt-holes, use of stiffeners or bolt preloading force. The use of higher grades of steel for the TCPs and stiffening them imposed higher strain demands in the beam and DPs and dissipated less energy than the joints with lower grades and unstiffened TCPs, respectively. The results confirmed that the main energy dissipation fuse in these joints was yielding in the TCPs while the other components remained elastic. Connection slippage created a second fuse for energy dissipation when the bolt preloading force was properly controlled, and the rotation of the plastic hinge region exceeded the minimum threshold of 25mrad for medium ductility class structures.
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Bezzel, Adelheid. "Therapie im Maßregelvollzug - und dann? : eine Verlaufsuntersuchung an forensischen Patienten ([section][section] 63 und 64 StGB)." kostenfrei, 2008. http://www.opus-bayern.de/uni-regensburg/volltexte/2009/1096/.
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Britton, Michael C. "Practical square cross-section helical antennas." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0001/MQ43337.pdf.
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Bringloe, James Benjamin. "Chromosome pairing in Rosa section caninae." Thesis, University of East London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365904.
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Al-Dore, Talal Abdul-Jabbar Abdul-Wahab. "Cold drawing of asymmetric section bars." Thesis, University of Bradford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278783.
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Fa-jun, Chen. "Variation within Fusarium section Moniliforme (= Liseola)." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292709.
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Abhakorn, Pongrapeeporn. "The cross-section of stock returns." Thesis, University of York, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428059.
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SILVA, WILSON FERREIRA DA. "ANALYSIS OF COMPLEX SECTION WIRE ROPES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1996. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=19738@1.
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A análise teórica de cabos de aço é bastante complexa. Durante anos, muitos tipos de cabos de aço têm sido testados experimentalmente para as mais diversas aplicações. No início dos anos 70, foi desenvolvido por Costello, um modelo teórico para prever as tensões de contacto entre os arames de uma perna de um cabo de aço. A partir deste modelo teórico, que possibilitou o estabelecimento das equações de equilíbrio de cada elemento do cabo, diversos trabalhos foram desenvolvidos na tentativa de solucionar as equações de cabos. Este sistema de equações é não linear e deve ser resolvido numericamente para os casos genéricos. Em 1994, uma aproximação linear para estas equações foi desenvolvida por Velinsky. Estas equações lineares de equilíbrio de cabos foram posteriormente generalizadas para geometrias e construções complexas.
Este trabalho apresenta o desenvolvimento de um programa para análise de cabos de aço de geometria complexa. O trabalho inicialmente apresenta o estudo das deformações de um arame helicoidal. Diversos destes arames formam as pernas, que enrolados posteriormente produzirão os cabos de aço. As deformações do cabo de aço são estudadas a partir da deformação individual de cada uma das pernas que o constituem. O programa desenvolvido neste trabalho considera o comportamento de cabos de aço composto por qualquer número de pernas (estas com qualquer número de arames). Estes cabos de aço podem ainda ter ou não núcleo interno. Os algoritmos utilizados pelo programa baseiam-se nas equações desenvolvido por Phillips e Costello em 1993. Os resultados obtidos por este programa são comparados com diversos resultados experimentais e numéricos disponíveis na literatura. O programa se mostrou capaz de simular o comportamento em cabos de construção complexa. Carregamentos compostos pela combinação de tração, com torção e flexão e ainda o efeito da passagem do cabo por roldanas e tambores de enrolamento em guindastes foram testados. As tensões e deformações obtidas nas mais diversas geometria de cabos com ou sem núcleo interno mostraram excelente concordância em todas as comparações feitas.The theorical analysis of wine rope is rather complex. Over the years, may types of wine rope have been tested experimentally for various applications. In the early 1970, Costello developed a theorical model to predict the contact stress in the individual wires of a strand. This model led to a series of papers on the solution of their equations of equilibrium. These equations are highly nonlinear and must be solved numerically on the computer. Approximate linear equations have been derived by Velinsky et al (1994), and generealized for any kind of wire rope by others. This work shows the development and results of a computer program that has been developed to analyze complex cables. The analysis of a rope begins with a study of the deformation of a helical wire in a strand. By the deformation of all wires in a given strand, one determines the response of that strand. Again by the deformation of all strands in the rope, one determines the response of a rope. The program developed treats in a realistic manner the deformation and stress of ropes having or not internal-wire-ropes cores. The algorithms is built around the original nonlinear equation of Philips and Costello (1993). Numerical results is presented and compared with the experiments reports in the literature. The program is capable of simulating bahavior in various situations and complex constructions for rope loaded in tension with twisting and bending over a sheave or drum. The stress and strain of diferents wire ropes habving an internal-wire-rope core (IWRC) are obtained eficiently in all experiments. The results show that the presented implementation produce minimum variation between the theory or the expected results. Results may be extended to include other consideration of rope behavior as contact stress and friction effect.
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Poltash, Alex. "Repealing Section 1031: The Economic Impact." Scholarship @ Claremont, 2016. http://scholarship.claremont.edu/cmc_theses/1280.
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The purpose of this paper was to assess the impact of a modification and or repeal of section 1031 in the U.S. Tax code. Specifically, this paper focused on a "revenue-neutral" repeal effect in which the additional proceeds from the repeal of section 1031 would go towards decreasing the corporate income tax rate. Overall, the treasury would remain neutral. The implications of this potential repeal were wide. The macroeconomic effect on the economy appeared to be negative, all other things being equal. GDP is predicted to fall by .11% each year. Additionally, Investment will be negatively affected with the decreased liquidity of "exchangeable" assets due to longer holding periods of these assets. Investors should expect to hold these assets longer to decrease their effective tax rate over the life of the investment. Investment is predicted to decline by $7 billion. Real Estate will be the industry that will ultimately be affected the most by a repeal situation as the real estate sector uses like-kind exchanges more frequently than in any other industry. Overall, we can expect to see small declines in macroeconomic factors due to the repeal of this provision that has been benefiting investors for decades.
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Ng, Hei-Fat Isaac. "Image processing for seismic section interpretation." Thesis, University of Surrey, 1993. http://epubs.surrey.ac.uk/844146/.
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In this thesis we investigate the applicability of image processing and pattern recognition techniques to seismic section analysis and interpretation in oil exploration. A seismic section obtained from seismic reflection prospecting is an acoustic image which displays the cross section of the subsurface structure. The data is employed by the seismic interpreters to infer the probable location of underground resources such as hydrocarbon accumulations. However, the task is labour intensive and must be performed by human experts with sound geological and geophysical knowledge and experience. The interpretation procedure is based on visual inspection, data comparison, geologic reasoning and decision making to confirm any subsurface reserves. Hence, automating the task could have a tremendous impact in terms of speeding up the interpretation task and giving more consistent interpretation results by virtue of minimizing the element of human subjective judgement. Much work is still required to develop an automatic analysis/interpretation system. Moreover, even a partial automation of the interpretation process would bring important productivity benefits. In this context, we limit the scope of investigation herein and place the emphasis on extracting geologic events from seismic images/sections based on perceived textural appearance of the data. We adopt the stance that seismic section data can be perceived as a texture image where the character of each distinct geologic event is manifest in its textural appearance. First we quantify such seismic textures using texture representation techniques suggested in the literature. Based on the representation we develop various methods for extracting important geological events from the data automatically. In this thesis, we propose two new approaches regarding the problems of extracting seismic events at the regional and local scales: Regional scale - Seismic Section Segmentation: Image regions of different textural appearance may represent distinct geologic regions. Thus by segmenting a seismic section into regions of homogeneous textural properties it should be possible to identify and delimit regions of different seismic and therefore geological character. A supervised segmentation scheme based on the Bayesian decision rule and using a multiresolution data representation is developed and is demonstrated on seismic images with good results. Local scale - Seismic Horizon Extraction: The perceived seismic texture is constituted by seismic horizons which are caused by a change in the acoustic impedance across the subsurface rock layers and are an indication of rock boundaries in the Earth's subsurface. The seismic horizon extraction procedures result in a line map of the subsurface rock boundary structure. However, the continuity of seismic horizons is invariably corrupted by noise and variation of lithology. Hence, we develop a new robust approach using a probabilistic relaxation labelling technique with a view to automatically locate the seismic horizons and preserve their continuity. The significance of the work is twofold: firstly it provides information to the interpreter which supplements or enhances visual information available in the seismic data which otherwise are less obvious and may be ignored. Secondly, it serves as a building block for more advanced automatic analysis/interpretation system.
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Ольховик, Віталій Леонідович, Виталий Леонидович Ольховик, Vitalii Leonidovych Olkhovyk, and J. I. Amaefuna. "Features vaginal birth after cesarean section." Thesis, Видавництво СумДУ, 2012. http://essuir.sumdu.edu.ua/handle/123456789/27539.
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Yu, Dmytruk A. "PHILOSOPHICAL MEANING OF THE GOLDEN SECTION." Thesis, Національний авіаційний університет, 2017. http://er.nau.edu.ua/handle/NAU/28072.
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Britton, Michael C. (Michael Charles) Carleton University Dissertation Engineering Electronics. "Practical square cross-section helical antennas." Ottawa, 1999.
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Uslu, Kadir. "Evaluation Of Pile Driving Lead Section." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000212.
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Kang, Robin. "Heart frontal section and hypertrophic cardiomyopathy /." Online version of thesis, 2010. http://hdl.handle.net/1850/11651.
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Porter, James Mark. "Phylogenetic systematics of Gilia section Giliandra." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186416.
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Nuclear ribosomal internal transcribed spacer (ITS) DNA sequences are used to (1) estimate the phylogeny of thirty-six members of Polemoniaceae and (2) estimate the phylogeny of twenty-five populations, representing fifteen named species of Gilia section Giliandra. Analyses evaluating robustness estimations suggest that the earliest branching events are not resolvable using ITS sequences. Evidence is presented to suggest that the genus Gilia, as currently interpreted, is polyphyletic, comprised of at least three independent lineages. Species currently included in Gilia sect. Giliandra represent a monophyletic lineage, independent of the "true Gilias," but sharing common ancestry with G. latifolia. The evolution of reproductive systems is evaluated, using a phylogeny of the fifteen diploid species of Giliandra, derived from a combined sequences and morphological data. Although P/O differs significantly between autogamous and xenogamous classes of species, there is no major changes in P/O associated with the transition from xenogamy to autogamy relative to changes in P/O within xenogamous and autogamous lineages. There is a major decrease in pollen production associated with this transition. It is also shown that changes in pollen and ovule production are uncorrelated.
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Price-Brenner, Paul Alan. "Concerto for viola section and orchestra." Diss., University of Iowa, 2017. https://ir.uiowa.edu/etd/5605.
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Concerto for Viola Section and Orchestra is a two-movement work lasting nineteen minutes. Its first movement in entitled Frenetic, and the second, Song and Finale, is made up of a slow and fast section. The concerto is scored for piccolo, two flutes, two oboes, two clarinets in B-flat, bass clarinet, two bassoons, two horns in F, two trumpets in C, tenor trombone, bass trombone, four percussion, a section of seven violists, violins 1, violins 2, violoncellos, and double basses.
Balance can be one of the main problems with writing a work for solo viola and orchestra. While the viola’s timbre makes it an enticing instrument, there is a restriction that keeps it from easily projecting over an orchestra. Composers have devised several methods for solving the problem. For example, Paul Hindemith was careful not to over orchestrate in his concerto entitled Der Schwanendreher. By limiting the number of cellos and basses to four and three respectively, and by omitting violins and other violas altogether, Hindemith thinned out and removed timbres that might obstruct the viola.
In my concerto for a section of violas, I also consider orchestration as a solution to the problems of balance and projection. However, I focus on the soloists in contrast to the orchestra. By composing for seven violas, I utilize the thickness of sound achieved through chorusing. Using any combination of the violas, it becomes easier for the listener to perceive the viola timbre. Furthermore, this use of multiple violas allows for more complex counterpoint in solo passages, something a single instrument is not able to manage on its own. This piece is not a concerto grosso in any sense. The soloists do not perform as a smaller chamber ensemble extending from the larger orchestra. Instead, the soloists are treated as a single entity. They act as one unit, using seven performers to do the work of one soloist.
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Arsenault, Caroline. "Development of a new design method for the cross-section capacity of steel slender I-sections." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/33548.
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Ce mémoire présente la recherche effectuée concernant le développement d’une nouvelle méthode de dimensionnement spécifiquement dédiée aux sections en acier en I très élancées par l’entremise de l’Overall Interaction Concept (O.I.C.). Le comportement en section est défini par deux comportements extrêmes, soit la résistance et l’instabilité pure. Les méthodes de calculs couramment utilisées dans les normes nécessitent d’abord de classer la section pour ensuite calculer les propriétés de la section efficace. Ces méthodes comportent quelques incohérences ainsi qu’un manque de précision. Une nouvelle méthode de dimensionnement qui considère la section entière – qui ne requiert donc plus de calculer les propriétés efficaces – et l’interaction entre les plaques peut et doit être développée. La considération des imperfections tant géométriques que matériels permet d’atteindre une plus grande précision, et l’utilisation d’outils numériques performants permet également d’augmenter l’efficacité des calculs. L’Overall Interaction Concept permet de calculer rapidement la résistance en section en fonction de l’élancement relatif généralisée, au moyen de courbes d’interaction. L’objectif principal de cette maîtrise est donc d’adapter l’O.I.C. aux sections ouvertes en I très élancées, comme celles utilisées dans le domaine des ponts, soumises à des cas de chargement simples (compression pure ou flexion d’axe fort seulement). Un modèle numérique a d’abord été développé en réalisant entre autres une étude de densité de maillage et des études sur les imperfections géométriques et matérielles à utiliser. Cette dernière étude doit être fait minutieusement et les choix effectués doivent être justifiés convenablement puisqu’aucune donnée expérimentale n’est disponible pour calibrer le modèle. Une fois le modèle fiable développé, une campagne numérique comptabilisant plus de 3500 simulations a été faite, permettant ainsi d’analyser l’effet de certains paramètres sur la résistance en section. Sur la base de ces simulations numériques, une proposition de méthode de dimensionnement a été faite en fonction des paramètres déterminants, c’est-à-dire le choix des contraintes résiduelles, du type de chargement et des propriétés géométriques géométrique de la section par l’entremise du paramètre μ. La formulation d’Ayrton-Perry a été adaptée pour définir les courbes d’interaction servant à prédire la résistance. En parallèle au développement de la méthode, des études ont été effectuées pour comparer les résultats obtenus pour la résistance en section selon les normes canadiennes, américaines et européennes avec les résultats obtenus numériquement. Ainsi, il a été possible d’observer la capacité d’amélioration des méthodes couramment utilisées tant en termes de précision que de simplicité.This dissertation presents research developments related to the design of very slender open steel sections through the Overall Interaction Concept (O.I.C.). The cross-sectional behaviour is defined by two extreme, ideal behaviours: pure resistance and pure instability. Methods used in the current standards need to classify the section, and, in the case of bridge sections, to calculate effective properties. This method presents some inconsistencies, as well as accuracy issues. A new design approach considering the whole section – and by that interaction between plates – was developed. By including the geometrical and material imperfections, more accuracy can be reached, and using numerical tools can increase the efficiency as well. The Overall Interaction Concept allows to calculate fast the resistance of a cross-section by using a generalized relative slenderness, so-called interaction curves. The main aim of this master is to adapt the O.I.C. to very slender open I-sections subjected to simple load cases (major-axis bending moment and pure compression). A numerical model has been developed by carry out mesh density study, and imperfections studies. This part had to be carefully detailed and assessed since no experimental data can be available to calibrate the numerical models. Once a reliable model was settled, a numerical campaign of more than 3500 simulations has been undertaken, allowing to analyse the effects of many key parameters. Based on these numerical simulations, design proposals were made as based on the identified governing parameters, i.e. the residual stresses pattern, load case and geometrical properties by means of newly-proposed parameter μ. An extension of the Ayrton-Perry formulation is finally used to define crosssection interaction curves. Besides, systematic comparison with Canadian, American and European Standards are done with the results from numerical simulations allowing to observe the improvement capacity of the current methods, in terms of accuracy and simplicity.
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Liss, Camilla, and Sandra Pålsson. "Amningsduration vid sectio och vaginalförlossning : Breastfeeding duration at cesarean section and vaginal delivery. Apopulationbased register study." Thesis, Högskolan Dalarna, Omvårdnad, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-6214.
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Bakgrund: Amning är av stor betydelse för det nyfödda barnet och mamma, både ur närings- och trygghetsaspekter. Tidigare studier om sambandet mellan förlossningssätt och amning visar motstridiga resultat; vissa studier indikerar att sectio påverkar amningen negativt medan andra studier inte visar på något samband.Syftet: Att undersöka huruvida det finns demografiska och hälsorelaterade skillnader hos mammor gällande förlossningssätt samt om förlossningssätt påverkar amningsdurationen upp till två månaders ålder.Metod: Studien har en populationsbaserad kohortdesign och omfattar n= 35250 mamma-barn par i Örebro- och Uppsala län, där barnet fötts åren 1993-2001. Statistiska analyser har genomförts med Chi-square test, binär logistisk regressionsanalys och multivariat logistik regressionsanalys.Resultat: Visade att mammor som förlösts med sectio ammade i lägre utsträckning vid två månaders ålder i jämförelse med mammor som förlösts vaginalt. Många riskfaktorer identifierades för en ökad risk att förlösas med sectio: län, hälsofaktorer hos mamma och barn, paritet, mammans ålder, rökning samt socioekonomiska faktorer. Resultatet kan hjälpa barnmorskan i hennes profession, genom att kunskap erhålls om dessa samband. Barnmorskan kan därmed identifiera riskfaktorer, arbeta förebyggande och underlätta initieringen av amning.Konklusion: Barnmorskor kan med hjälp av denna studie öka medvetenheten hos vårdpersonal angående sectioförlösta mammors behov av extra stöd vid initiering av amning.
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Neumann, Christian. "Reform der Anschlussdelikte Begünstigung, Strafvereitelung und Hehlerei ([section][section] 257 ff. StGB) ; Reformdiskussion und Gesetzgebung seit 1870 /." Münster : Verl.-Haus Monsenstein und Vannerdat, 2007. http://d-nb.info/995805725/34.
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Rune, Mawethu Siyabulela. "Application of Section 189 and Section 189A of the Labour Relations Act 66 of 1995 as amended." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1281.
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Economies worldwide have become more integrated and competitive due to the phenomenon of globalisation and its antecedents, which are improved technological communication, the use of technology in production, ever improving management of skills as well as standards of education. Amongst the consequences have been changing demands and rising expectations in terms of employee remuneration, job security and conditions of work. This has at the same time been accompanied by employers expecting greater profit. Against this backdrop, this treatise seeks to interrogate and to explain the processes that should constitute fair, rational and justifiable employee dismissal for operational purposes. This is done bearing in mind the global economic crisis and its impact on employees. The treatise constitutes an attempt to carve a cushioning mechanism for employees in the midst of the global economic storm. We consider the inadequacies of common law principles. We also submit that section 189 in its present form and its application by courts do not provide for substantive fairness interrogation when dealing with dismissal for operational reasons. We explore the legislative framework, interpretation by leading academics as well as applications by courts of section 189A, which prescribes that if dismissal is based on operational reasons, consideration must not only be based on substantive and procedural fairness but also that proper consideration of alternatives must have been explored before dismissal is effected.
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Émond, Danny. "Section création: Le repaire des solitudes - Section réflexion critique: La construction du personnage dans la nouvelle contemporaine." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28255/28255.pdf.
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Münch, Matthias. "Die Abziehbarkeit von Finanzierungskosten im Einkommen- und Körperschaftsteuerrecht : insbesondere [section] 3c Abs. 1 und Abs. 2 EStG, [section] 8b Abs. 3 und Abs. 5 KStG sowie [section] 8a KStG /." Hamburg : Kovač, 2006. http://www.verlagdrkovac.de/3-8300-2597-1.htm.
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Meyer-Conde, Marco. "Measurement of absolute Drell-Yan cross-sections using a 190-GeV π⁻ beam at the COMPASS-II experiment." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS472/document.
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La prise de données réalisée en 2015 par la collaboration COMPASS au CERN a permis de collecter un nombre significatif de paires de muons de grande masse. Ces dernières proviennent de l’interaction d’un faisceau de pions négatifs d’impulsion 190 GeV/c sur des cibles d’ammoniac (NH₃), d’aluminium (Al) ou de tungstène (W). Ce travail de thèse décrit les différentes étapes d’analyse des données de Drell-Yan dans la région de masse entre 4.3 et 8.5 GeV/c², depuis la reconstruction des traces du pion incident et des muons diffusés, jusqu’à l'extraction des sections efficaces finales. Ces étapes comprennent la détermination du flux incident et des densités des trois cibles, l’évaluation des différentes efficacités expérimentales, le calcul de l’acceptance de l’appareillage par simulation Monte-Carlo et la réduction des données à des paires de muons. Présentées en fonction de la variable de Feynman xF et de l’impulsion transverse pT, les sections efficaces Drell-Yan sont comparées aux calculs théoriques aux ordres NLO et NNLO, ainsi qu’aux résultats des expériences antérieures. Une interprétation plus poussée des résultats donnera accès aux distributions des partons dans le pion et à l’étude des effets de la matière froide dans les noyauxThe COMPASS collaboration at CERN collected a significant amount of Drell-Yan data in 2015. The measured lepton pairs originate from the interaction of a negatively charged pion beam at 190 GeV/c with ammonia targets (NH₃), aluminum (Al) or tungsten (W). The analysis step using the Drell-Yan data are discussed in the mass range between 4.3 and 8.5 GeV/c², starting from the reconstruction of the incoming pion beam and the scattered muons, until the extraction of the Drell-Yan cross-sections. These steps include the determination of the incoming beam flux and the three target densities, the overall efficiency of the experimental apparatus, the acceptance of this spectrometer using Monte-Carlo simulations, and the reduction of the initial data to muon pairs. The Drell-Yan cross-sections, expressed in terms of the scaling variable xF and the transverse momentum pT, are compared with theoretical predictions at NLO and NNLO, as well as some previously published results. An advanced interpretation of these results would give access to the partonic distribution of the pion and lead to the study of cold nuclear matter effects
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Mulholland, Daniel J. "Distribution of aerofoil section lift from section pitching moment applied to a dynamic model for aircraft poststall departure." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-02132009-172236/.
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Salvador, Castiñeira Paula. "Neutron-induced fission cross section of 240,242Pu." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/284746.
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A recent sensitivity analysis done for the new generation of fast reactors [1] has shown the importance of improved cross section data for several actinides. Among them, the neutron-induced fission cross section of 240,242Pu requires a level of accuracy of 1-3% and 3-5%, respectively, from the current status of 6% and 20%. Moreover, nearly all the measurements in the literature have been done relative to 235U(n,f). Therefore, using other references samples such as 237Np or 238U will provide the scientific community with more valuable data.
The work was carried out at the Institute for Reference Materials and Measurements (JRC-IRMM). The Van de Graaff accelerator was used for producing a quasi-monoenergetic neutron flux in the energy range of 0.3MeV to 3MeV. Protons were accelerated thanks to a potential difference. A neutron producing target was placed at the end of the beam line: 7Li(p,n)7Be or T(p,n)3He. Then, a twin Frisch-grid ionization chamber (TFGIC) was used as detector. The setup of the detector consists in a common cathode, two anodes and two grids. In the cathode the sample under study and the reference sample are placed in a back-to-back configuration. Each electrode is connected to a preamplifier, and then to a 100MHz 12 bit waveform digitizer. All raw signals are stored for an offline analysis using C++ under the ROOT framework.
All the samples used were produced by the target preparation group at JRC-IRMM. The enrichment of the plutonium samples was of 99.89% for 240Pu and of 99.97% for 242Pu. The plutonium masses were chosen to minimize their alpha activity (0.8MBq for 240Pu and 0.1MBq for 242Pu). Three different reference fission cross sections were employed: 235U(n,f), 238U(n,f) and 237Np(n,f). The mass of all the reference samples used was remeasured by means of low geometry alpha counting or/and by a single grid ionization chamber. The mass uncertainty of each sample was lower than 2%.
Results were obtained not only for the neutron-induced fission cross section of 240,242Pu in the region from 0.3 MeV up to 3 MeV, but for the 238U(n,f) cross section and the 237Np(n,f) cross section. The neutron flux from the Van de Graaff was characterized by means of MCNP simulations. A clear influence of the different structures between the neutron producing targets and the deposits was found, specially when the ratios measured involved a fissile sample and a threshold sample. The spontaneous fission of 240,242Pu is, as well, an important correction. Thus, this property was measured independently in this work, reaching an uncertainty lower than 1.3% for both isotopes. More corrections were due to the high electronic threshold needed to not trigger on alpha particles, the fission fragment loss due to the sample thickness, neutron emission anisotropy, etc.
On average the results of the 240,242Pu(n,f) cross section are in agreement with previous experimental data, even though the trend is slightly lower than present evaluations. In the case of 242Pu(n,f) cross section the resonance-peak structure at 1.1 MeV could not be reproduced in any case. The results of the 237Np(n,f) cross section show an increase at the plateau region with respect to the ENDF/B-VII.1 evaluation in the same way as the data from Paradela (2010) [2]. The results for the 238U(n,f) cross section show a higher cross section than the ENDF evaluation but in agreement with the present JEFF 3.2 evaluation.
[1] Uncertainty and target accuracy assessment for innovative systems using recent covariance data evaluations, Volume 26, 2008, OECD-NEA
[2] Paradela, C. et al., Neutron-induced fission cross section of U-234 and Np-237 measured at the CERN Neutron Time-of-Flight (n_TOF) facility.,Physical Review C. 82, 3, 034601 (2010)Un anàlisi de sensitivitat [1] recent per la nova generació de reactors ràpids va mostrar la importància de millorar les seccions eficaç de varis actínids. Entre ells, la secció eficaç de fissió per neutró induït del 240,242Pu requereix una millora en la seva precisió des d'un 6% a un 1-3% pel 240Pu i des d'un 20% a un 3-5% pel 242Pu. A més, quasi bé totes les dades experimentals disponibles a la literatura han estat determinades relatives a la secció eficaç del 235U(n,f). Per tant, la utilització d'altres isòtops com a referències, tal com el 237Np(n,f) o el 238U(n,f), proveirà a la comunitat científica amb dades valuoses. Aquest treball ha estat realitzat a l'Institute for Reference Materials and Measurements (JRC-IRMM). L'accelerador Van de Graaff disponible al JRC-IRMM s'ha emprat per produir un flux de neutrons quasi mono-energètics en el rang de 0.3 MeV a 3 MeV. Els protons van ser accelerats de fer-los impactar amb una mostra de producció de neutrons: 7Li(p,n)7Be o T(p,n)3He. A continuació, una doble cambra d'ionització amb grid (TFGIC) es va emplaçar com a detector consistent en un càtode, dos ànodes i dos grids. En el càtode es situen la mostra a estudiar i la mostra de referència. Cada un dels elèctrodes és connectat a un preamplificador i, a continuació, a un digitilitzador amb una freqüència de 100 MHz i 12 bit. Les senyals originals són emmagatzemades sense cap tractament previ per a un posterior anàlisi. El tractament de dades es va realitzar mitjançant el codi de programació C++ sota el marc de ROOT. Totes les mostres emprades en aquest experiment s'han produït al grup de preparació de mostres del JRC-IRMM. L'enriquiment de les mostres de plutoni era de 99.89% pel 240Pu (0.8MBq) i del 99.97% pel 242Pu (0.1MBq). La massa de les tres mostres de referència (235U(n,f), 238U(n,f) i 237Np(n,f)) també va ser mesurada. La incertesa de cada massa és inferior al 2%. La principal correcció aplicaca als resultats obtinguts ha estat per la caracterització del flux de neutrons mitjançant el codi de simulació Monte Carlo MCNP. Els resultats de les simulacions han mostrat una clara influència de les diferents estructures emplaçades entre la mostra de producció de neutrons i les mostres de fissió. Altres correccions s¿han realitzat per la fissió espontània del 240,242Pu (mesurada independentment en aquest treball amb una incertesa inferior al 1,3%), la deficiència d'esdeveniments a causa del llindar de detecció, l'eficiència del detector, l'anisotropia en l'emissió dels neutrons, etc. Tot i que el principal objectiu va ser l'obtenció de la secció eficaç de fissió per neutró induït del 240,242Pu en la regió de 0.3 MeV a 3 MeV, resultats addicionals han estat obtinguts per la secció eficaç del 238U(n,f) i el 237Np(n,f). Els resultats obtinguts mostren un acord significatiu entre la secció eficaç del 240,242Pu(n,f) i resultats experimentals anteriors, tot i que la tendència és lleugerament inferior a les avaluacions (ENDF/B-VII.1, JEFF 3.1 i JENDL 4.0) disponibles. En el cas de la secció eficaç del 242Pu(n,f), a més, el pic de ressonància al voltant de 1.1 MeV predit per quasi totes les dades experimentals anteriors i les avaluacions actuals no s'ha reproduït en aquest experiment. Els resultats de la secció eficaç del 237Np(n,f) presenten un increment en la regió plana després del llindar de fissió d'un 5-7% respecte l'avaluació ENDF/B-VII.1, i en concordança amb els resultats obtinguts per Paradela (2010) [2]. Finalment, els resultats de la secció eficaç del 238U(n,f) mostren un increment al voltant d'un 7-9% a la zona plana després del llindar de fissió, aquesta predicció concorda amb l'avaluació JEFF 3.2. [1] Uncertainty and target accuracy assessment for innovative systems using recent covariance data evaluations, Volume 26, 2008, OECD-NEA [2] Paradela, C. et al., Neutron-induced fission cross section of U-234 and Np-237 measured at the CERN Neutron Time-of-Flight (n_TOF) facility.,Physical Review C. 82, 3, 034601 (2010)
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Stamatopoulos, Peter G. "Metrics for monitoring section 845 "Other Transactions"." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA374235.
Full textAbstract:
Thesis (M.S. in Management) Naval Postgraduate School, December 1999."December 1999". Thesis advisor(s): David A. Smith, Bill Gates. Includes bibliographical references (p. 171-173). Also available online.
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Tesinsky, Milan. "MCNPX Simulations for Neutron Cross Section Measurements." Licentiate thesis, KTH, Reactor Physics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12929.
Full textAbstract:
This thesis presents MCNPX simulations of the SCANDAL set-up used at the Theodor Svedberg Laboratory for neutron scattering cross-section measurements. The thesis describes processes and data important for the upcoming off-line data analysis. In the experiment, neutrons scattered off the target are converted to protons which are stopped in scintillator crystals. The results of presented simulations include a description of the proton spectra in dependence of the neutron-to-proton conversion angle, calculation of the hit position gates and a study of the converter describing the role of its chemical composition and also the role of other plastic scintillator on the proton spectra.
QC 20100520
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Mohri, K. "Supersonic flow over rectangular-section annular cavities." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501753.
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