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Dissertations / Theses on the topic 'Effect Magnus'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

CORREA, CARLOS JOSE. "EXPERIMENTAL STUDY OF THE MAGNUS EFFECT." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1985. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=33498@1.

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O efeito magnus é verificado experimentalmente em túnel de vento, para escoamentos com números de Reynolds variando de 1,3 x 10 elevado 4 a 4,3 x 10 elevado a 4. Os resultados são avaliados em termos absolutos e adimensionalizados. Levando-se em conta as incertezas provenientes do método de ensaio, são feitas comparações com da dos obtidos por outros pesquisadores. São avaliadas as possibilidades de utilização do efeito em captação de energia eolica, e é também realizado um estudo da influência da forma de Magnus na trajetória de projetis estabilizados giroscopicamente.<br>The Magnus effect is

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2

Jinbo, Maro. "Contribuições ao projeto de sistemas eólicos de efeito magnus com rastreamento da máxima potência." Universidade Federal de Santa Maria, 2016. http://repositorio.ufsm.br/handle/1/12032.

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This work deals with an unconventional wind energy conversion system, in which the wind turbine has rotating cylinders rather than traditional blades. These cylinders can be driven by a brushless DC motor. The turbine operates on the physical principle called Magnus Effect. It presents the mathematical modeling of Magnus turbine and based on this modeling were carried out simulations in PSIM® software. It was implemented and was tested MPPT algorithms type HCC (Hill Climbing Control) for DC brushless motor control for operating the cylinders and hence the power generated by the Magnus turbine.

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3

Silva, Ricardo Galdino da. "Estudo numérico de movimentação de partículas em escoamentos." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-08032007-181139/.

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No trabalho desenvolvido estudaram-se as forças que atuam em uma partícula quando esta se movimenta em escoamentos, com intuito de obter uma metodologia capaz de representar o movimento de uma partícula em um escoamento. A equação do movimento da partícula foi integrada numericamente considerando os termos de massa aparente, arrasto estacionário, arrasto não estacionário (forças de Boussinesq/Basset) e forças de sustentação; efeito Magnus e efeito Saffman. O método dos volumes finitos foi utilizado para simulação do escoamento. Na análise das forças utilizamos tanto experimentos quanto simulaç

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4

Neumüller, Georg. "On Control and stabilisation of floating wind platforms with the help of CFD analysis and the Magnus effect." Thesis, KTH, Numerisk analys, NA, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213973.

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With new technologies and possibilities arising both in the renewable energy sector as well as in the field of Computational Fluid Dynamics, this thesis describes the simulation of vortex- induced vibrations for floating wind turbine platforms. The aim is to control and stabilize floating wind platforms with the help of CFD and the Magnus effect. The Magnus effect shall hereby be used to reduce the wakes behind the cylinder and thereby not only move the cylinder, but also reduce vibrations. Therefore this thesis consists of three main sets of experiments. The first set simulates vortex-induced

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5

Ribas, Glauco Salomão Ferreira. "Uma proposta para motivar o aluno a aprender mecância no ensino médio : abordagem com tecnologias de informação e comunicação." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/173055.

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Não porque faltem bons alunos, mas pelo motivo de que aprender Física é importante, por se tratar de uma cultura necessária a qualquer cidadão de uma sociedade e não apenas aos mais vocacionados, trago uma sugestão para que a predisposição em aprender Física dos alunos de ensino médio melhore. Assim este trabalho se ocupa em apresentar recursos e atividades que buscam aproximar a vida do aluno contemporâneo ao ensino de Física, através de uma abordagem com tecnologias de informação e comunicação (TICs). Nosso foco disciplinar é o ensino de Mecânica em um ambiente favorável à aprendizagem signi

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6

Денисов, Станіслав Іванович, Станислав Иванович Денисов, Stanislav Ivanovych Denysov, et al. "Minimal Set of Equations for Drift of Ferromagnetic Nanoparticles Induced by Magnetic Fields in Fluids." Thesis, Sumy State University, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67955.

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Recently, it has been established that ferromagnetic nanoparticles subjected to a periodic force and a non-uniformly rotating magnetic field can drift in a viscous fluid due to the Magnus effect. Because the drift phenomenon is of interest for applications such as particle separation, in this work we present a minimal set of equations for describing this phenomenon when a periodic force is induced by a gradient magnetic field.

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7

Петровський, Михайло Васильович, Михаил Васильевич Петровский, Mykhailo Vasylovych Petrovskyi та ін. "Метод електромагнітної сепарації феромагнітних наночастинок у суспензіях з урахуванням теплових флуктуацій". Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67919.

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Спрямований транспорт (дрейф) однодоменних феромагнітних частинок у в’язкій рідині, який можна використати для сепарації частинок за розміром і намагніченістю, виникає внаслідок синхронізованої дії на них змінної сили електричної природи, яка викликає їх коливальний рух, та зовнішнього однорідного магнітного поля, яке породжує змінний момент сил і викликає їх нерівномірне обертання. Фізичною причиною виникнення дрейфового руху є ефект Магнуса, тобто вплив обертання частинки на її траєкторію.

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8

Rutkauskienė, Rasa. "Levels of magnesium compounds of different solubility in predominant soil types in Lithuania, effects on agricultural plants." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2013. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130916_111245-03922.

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In Europe the views on the demand of magnesium by agricultural plants as well as on the need for magnesium fertilization are different. In European countries uses different methods for determining the available magnesium content in soil. Different assessment of soil characteristics in different countries as well as very unequal magnesium fertilization rates for crops have encouraged us to review the methods of determining available magnesium in soil and the effect of magnesium fertilizer on plants. The appropriateness of applying the magnesium determination methods commonly used in different s

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9

Amjad, Asma. "Exchange coupling in molecular magnets: Zero, one and three dimensions." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/5755.

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Molecular magnets with different dimensionality, whether they are zero-dimensional single-molecule magnets (SMM) or one-dimensional single-chain magnets (SCM) are very interesting, since they allow probing the fundamental aspects bordering quantum and classical physics at the nanoscale level. This dissertation covers experimental studies of two Mn-based exchange-coupled molecule-based magnets and two Co-based single-chain magnets, using both dc Hall-effect magnetometry and electron paramagnet resonance (EPR) techniques. In these multi-dimensional systems, the spin of the molecule exhibits quan

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10

Barhoumi, Rabei. "Positioning and addressing single molecule magnets with an STM tip." Thesis, Strasbourg, 2019. https://publication-theses.unistra.fr/restreint/theses_doctorat/2019/BARHOUMI_Rabei_2019_ED182.pdf.

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Les aimants moléculaires de type TbPc2 avec leur anisotropie magnétique élevée associée à des temps de relaxation longs de l’aimantation sont de bons candidats pour le codage et l’enregistrement de l’information. Leur robustesse et leur propension à s’arranger en réseaux se prêtent bien à une étude de leur structure électronique et magnétique par STM/STS à très basse température (4.5 K). Dans ce travail de thèse, il a été possible de mettre en évidence un écrantage Kondo des électrons π et 4f de la molécule de TbPc2 par les électrons du substrat métallique. Les propriétés magnétiques de la mol

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11

Rodríguez, Cortéz Carlos Alfonso. "Effect of thermal magnons onedge fluctuations innanomagnets." Thesis, Uppsala universitet, Materialfysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-451961.

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12

Weaver, Andrea Lynn. "The Effect of a Lingual Magnet on Fricative Production: An Acoustic Evaluation of Placement and Adaptation." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1009.pdf.

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13

Subedi, Pradeep. "Collective effects in Single Molecule Magnets." Thesis, New York University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3602734.

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<p> Single molecule magnets (SMMs), such as Mn<sub>12</sub>-acetate, are composed of transition metal ions and consists of identical molecules with large ground-state spin (<i>S</i> = 10) and a strong uniaxial anisotropy (65 K). Below about 3 K, Mn<sub>12</sub>-acetate exhibits magnetic hysteresis with steps at specific values of longitudinal magnetic field due to resonant quantum tunneling between spin up and down projections along the easy axis. The intermolecular exchange interactions between spins on molecules are quite small and spins are considered to be independent and non-interacting.

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14

Le, Goff Anne. "Figures d'impact : tunnels, vases, spirales et bambous." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00489654.

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Nous étudions expérimentalement différentes figures d'impacts de solides sur des liquides. Dans un premier temps, nous lançons à grande vitesse une bille dans un bain. Nous mesurons sa décélération et en déduisons la force exercée par le fluide sur la bille. Nous montrons ainsi qu'une mousse fortement cisaillée se comporte comme un fluide visqueux. Lors de ces impacts violents, de l'air est entraîné dans le bain par le projectile. Il se forme alors au sein du liquide une cavité que nous caractérisons : elle prend la forme d'un tunnel dans la mousse, d'un vase dans une huile visqueuse, et d'une

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15

Chan, Hung-chiu Kingsley. "Cast keepers for dental magnets : effects of laboratory procedures /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31490335.

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16

Bui, Dinh Tri. "Etude expérimentale des actions hydrodynamiques sur une sphère en translation et rotation dans une gamme de nombres de Reynolds intermédiaires." Vandoeuvre-les-Nancy, INPL, 1992. http://docnum.univ-lorraine.fr/public/INPL_T_1992_BUI_DINH_T.pdf.

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On étudie expérimentalement, par une méthode de trajectographie stroboscopique, les actions exercées par un fluide visqueux incompressible sur une sphère en mouvement de translation et rotation simultanées. Le domaine exploré est celui des nombres de Reynolds compris approximativement entre 10 et 100, qui sont ceux que l'on rencontre fréquemment dans le calcul de trajectoires de particules solides en suspension dans un fluide. Les résultats, qui portent essentiellement sur le coefficient de portance, sont tout à fait originaux et contribuent aux connaissances existantes en les complétant par u

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17

Gonzalez, Gabriel. "Electron transport in single molecule magnet transistors and optical [lambda] transitions in the ¹⁵N-V⁻ center in diamond." Orlando, Fla. : University of Central Florida, 2009. http://purl.fcla.edu/fcla/etd/CFE0002740.

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18

Lipfert, Tobias. "Ordering effects in quantum optics." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R007/document.

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En optique quantique, la nature quantique de la lumière se manifeste dans des effets d’ordonnement d’opérateurs, inexistants en optique classique. Cette thèse est consacrée à une étude détaillée de ce type d’effets d’ordonnement dus à la dynamique des systèmes physiques. Nous considérons deux systèmes en particulier, 1) la conversion paramétrique descendante dans un milieu χ (2), et 2) un ion dans un piège de Paul entraı̂né par un champ classique; décrit par un modèle de Jaynes-Cummings non linéaire. Les effets d’ordonnement dans ces systèmes dynamiques sont étudiés via le développement et l’a

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19

Lincoln, Derek M. "The electronic structure and field effects of an organic-based room temperature magnetic semiconductor." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1193833038.

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20

Ohm, Thorsten. "Effet tunnel quantique de l'aimantation dans un aimant moleculaire, Fe8." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10187.

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Nous avons étudié les retournements d'aimantation par effet tunnel quantique dans des aimants moléculaires. Nos expériences montrent clairement l'effet tunnel quantique dans l'aimant moléculaire Fe8. Ce système se compose d'un ensemble d'aimants nanoscopiques identiques et orientes parallèlement. Chacune des molécules porte un spin s = 10. Les mesures de relaxation sont faites en utilisant des magnétomètres à squid aux performances uniques. Ces magnétomètres permettent des mesures de haute sensibilité en champ fort, jusqu'a 8 tesla, et aux très basses températures (>50 mK). A haute température

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21

DAMENTO, MICHAEL ANTHONY. "DETECTION OF MAGNETIZATION REVERSAL IN A NEODYMIUM-IRON-BORON MAGNET USING A HALL-EFFECT MICROPROBE." Diss., The University of Arizona, 1986. http://hdl.handle.net/10150/183945.

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Magnetization processes in a sintered Nd-Fe-B permanent magnet (NEOMAX-35) were examined on a small scale using a Hall-effect microprobe with an active area 75 μm on a side. Probes were made by evaporating bismuth through a stencil mask onto glass slides. Experiments were performed by placing a probe onto the polished pole face of a Nd-Fe-B magnet and inserting the probe-magnet assembly into an electromagnet. Barkhausen steps, indicating rapid domain wall motion, were observed (superimposed upon the blank probe signal) in the demagnetization of a fully magnetized magnet. Magnetization traces f

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22

陳鴻釗 and Hung-chiu Kingsley Chan. "Cast keepers for dental magnets: effects of laboratory procedures." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45007706.

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23

BharrathSingh, Kathy. "Prototypes and the perceptual magnet effect in the perception of vowels." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ57602.pdf.

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24

Parois, Pascal. "The effect of pressure on clusters, chains and single-molecule magnets." Thesis, University of Glasgow, 2010. http://theses.gla.ac.uk/1789/.

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This research deals with the investigation of the correlation between the structures of molecules and their magnetic properties as a function of pressure. To do so, different kinds of molecules have been chosen from single-molecules magnets, chains to small molecules. The variety of molecules is necessary to find the best candidates for high pressure X-ray crystallography and high pressure magnetic measurements. Bonds lengths and angles have been successfully altered by using high pressure without the complicating issues of chemical modifications. These structural changes produced a significan

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Bharrathisingh, Kathy 1966 Carleton University Dissertation Psychology. "Prototypes and the perceptual magnet effect in the perception of vowels." Ottawa.:, 2000.

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26

Wang, Hangtian. "Interfacial Engineering of the Magnetism in 2D Magnets, Topological Insulators, and Their Heterostructures." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0206.

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Alors que le nœud critique des circuits intégrés (CI) entre dans la phase 1 nm, les matériaux tridimensionnels traditionnels ne peuvent pas conserver leurs propriétés physiques d'origine et ne peuvent donc pas répondre aux besoins des processus de fabrication des circuits intégrés. Parallèlement, la diminution de la largeur des lignes entraîne également une augmentation inévitable de la consommation d'énergie statique. Par conséquent, la recherche de nouveaux matériaux et de nouvelles technologies pour briser le « mur de taille » et le « mur de puissance » est devenue une direction cruciale da

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27

Prescimone, Alessandro. "Effect of high-pressure on molecular magnetism." Thesis, University of Edinburgh, 2010. http://hdl.handle.net/1842/4619.

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The effect of pressure on a number of magnetically interesting compounds such as single-molecule magnets and dimeric copper and manganese molecules has been investigated to probe the validity of ambient magneto-structural correlations. The first chapter is an introduction to the equipment and methodologies that have been adopted to carry out the experimental high-pressure work. The second chapter reports the first combined high-pressure single crystal X-ray diffraction and high pressure magnetism study of four single-molecule magnets (SMMs). At 1.5 GPa the structures [Mn6O2(Et-sao)6(O2CPh(Me)2

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Guerra, Gabriel Andrés Fonseca. "Study of the longitudinal spin Seebeck effect in hybrid structures with yttrium iron garnet and various metallic materials." Universidade Federal de Pernambuco, 2014. https://repositorio.ufpe.br/handle/123456789/12719.

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Submitted by Daniella Sodre (daniella.sodre@ufpe.br) on 2015-04-08T12:40:55Z No. of bitstreams: 2 DISSERTAÇÃO Gabriel Fonseca.pdf: 3837074 bytes, checksum: e2c9b20882785e374170658d648ee389 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5)<br>Made available in DSpace on 2015-04-08T12:40:55Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO Gabriel Fonseca.pdf: 3837074 bytes, checksum: e2c9b20882785e374170658d648ee389 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2014-03-10<br>Conselho Nacional de Desenvolvimento Cientí

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Danielsson, Oskar. "Wave Energy Conversion : Linear Synchronous Permanent Magnet Generator." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7194.

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Xue, Shaoshen. "Investigation of iron losses in permanent magnet machines accounting for temperature effect." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/19064/.

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Samin, Adib J. Jr. "An analysis of neutron radiation effects on NdFeB permanent magnets." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405899609.

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32

Maurand, Romain. "SQUID à nanotube de carbone : jonction Josephson à boîte quantique, jonction-Ä, effet Kondo et détection magnétique d'une molécule aimant." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00593729.

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La manipulation de la matière au niveau nanométrique a ouvert depuis une quinzaine d'années de nouveaux champs fondamentaux et applicatifs pour les scientifiques et les industriels. Dans ce nouveau paradigme, la nanoélectronique quantique se propose de fonder une nouvelle électronique basée sur les phénomènes quantiques de la matière et plus particulièrement sur la nature quantique des électrons. Ce projet de thèse s'articule autour d'un système électronique quantique hybride supraconducteur/nanotube de carbone (CNT) dénommé nano-SQUID. Ce dispositif présente une boucle supraconductrice conten

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Zhao, Zhidong. "Modeling Shape Effects in Nano Magnetic Materials With Web Based Micromagnetics." ScholarWorks@UNO, 2005. http://scholarworks.uno.edu/td/157.

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This research work focuses on the geometry and shape effects on submicron magnetic material. A web based micromagnetics program is written to model the hysteresis loop of nano magnetic samples with arbitrary geometry shapes and multiple magnetic materials. Three material samples have been modeled with this program along with nano magnets with a variety of geometric shapes. Shape anisotropy has been introduced to a permalloy ring by adding a cross-tie structure with various widths. The in-plane hysteresis loop and reversal behavior have no notable difference in direction parallel to th

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Yu, Riqing. "Metal uptake, assimilation and stoichiometric effects in daphnia magna /." View Abstract or Full-Text, 2002. http://library.ust.hk/cgi/db/thesis.pl?BIOL%202002%20YUR.

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Cheng, Yihong, Kai Chen, and Shufeng Zhang. "Giant magneto-spin-Seebeck effect and magnon transfer torques in insulating spin valves." AMER INST PHYSICS, 2018. http://hdl.handle.net/10150/627032.

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We theoretically study magnon transport in an insulating spin valve (ISV) made of an antiferromagnetic insulator sandwiched between two ferromagnetic insulator (FI) layers. In the conventional metal-based spin valve, the electron spins propagate between two metallic ferromagnetic layers, giving rise to giant magnetoresistance and spin transfer torque. Here, the incoherent magnons in the ISV serve as angular momentum carriers and are responsible for the angular momentum transport between two FI layers across the antiferromagnetic spacer. We predict two transport phenomena in the presence of the

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Xu, Yan 1963 Jan 31. "Effect of quench rate on the coercivity of Nd-Fe-B permanent magnets." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55669.

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37

Shepherd, Marie Norfleet. "The Effects of a Middle School Magnet Program on Eighth Grade Student Performance." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30498.

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Magnet schools were developed in the early 1970s when a large number of urban school districts began seeking alternatives to court-ordered desegregation mandates (Levine and Steel, 1994). Since that time, numerous studies have been conducted on the effectiveness of magnet schools in providing a racially balanced learning environment as well as increasing academic achievement. The purpose of the causal-comparative study was to determine if the math and science magnet program at a middle school affected achievement, attendance, and parent perceptions. This study conducted three differe

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Lipfert, Tobias. "Ordering effects in quantum optics." Electronic Thesis or Diss., Université de Lille (2018-2021), 2019. http://www.theses.fr/2019LILUR007.

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En optique quantique, la nature quantique de la lumière se manifeste dans des effets d’ordonnement d’opérateurs, inexistants en optique classique. Cette thèse est consacrée à une étude détaillée de ce type d’effets d’ordonnement dus à la dynamique des systèmes physiques. Nous considérons deux systèmes en particulier, 1) la conversion paramétrique descendante dans un milieu χ (2), et 2) un ion dans un piège de Paul entraı̂né par un champ classique; décrit par un modèle de Jaynes-Cummings non linéaire. Les effets d’ordonnement dans ces systèmes dynamiques sont étudiés via le développement et l’a

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Bingham, Nicholas Steven. "Magnetism in Complex Oxides Probed by Magnetocaloric Effect and Transverse Susceptibility." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4440.

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Magnetic oxides exhibit rich complexity in their fundamental physical properties determined by the intricate interplay between structural, electronic and magnetic degrees of freedom. The common themes that are often present in these systems are the phase coexistence, strong magnetostructural coupling, and possible spin frustration induced by lattice geometry. While a complete understanding of the ground state magnetic properties and cooperative phenomena in this class of compounds is key to manipulating their functionality for applications, it remains among the most challenging problems facing

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Trijau, Marie. "Approche moléculaire et mécaniste de la réponse transgénérationnelle lors d'une irradiation gamma chronique chez le cladocère Daphnia magna." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0467/document.

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Afin de protéger durablement les écosystèmes face aux rejets planifiés ou accidentels de radionucléides dans l’environnement, il est essentiel d’évaluer l’impact de l’exposition des organismes aux radiations ionisantes sur le long terme, à l’échelle de plusieurs générations. Dans ce contexte, ce travail de doctorat vise à améliorer la caractérisation des processus moléculaires et la prédiction des effets transgénérationnels lors d’une exposition aux radiations gamma. Une approche expérimentale concerne l’étude des modifications épigénétiques radio-induites, c’est-à-dire des modifications des m

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Sorbom, Brandon Nils. "The effect of irradiation temperature on REBCO Jc degradation and implications for fusion magnets." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/120392.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 143-154).<br>Recent advances in high temperature superconductors (HTS) have opened up a new parameter space for the design of tokamak fusion pilot plants. While previously the maximum on-axis field in a superconducting tokamak was limited to ~6 T, HTS allows tokamaks to be designed with much higher on-axis fields, leading to smaller reactor designs. For these designs, it is critical to determine the li

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Wu, Lijian. "Analytical modelling of electromagnetic performance and parasitic effects of permanent magnet machines." Thesis, University of Sheffield, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.647997.

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Parisot, Florian. "Étude mécaniste des effets transgénérationnels des radiations ionisantes alpha et gamma chez Daphnia magna." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4104/document.

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Les activités anthropiques liées à l'industrie nucléaire contribuent à des rejets continus de radionucléides dans les écosystèmes terrestres et aquatiques. Les travaux réalisés au cours de ce doctorat visent à apporter de nouvelles connaissances relatives aux effets des radiations ionisantes au cours d’une exposition multigénérationnelle de l’invertébré aquatique, Daphnia magna. Une irradiation gamma externe à des débits de doses pertinents du point de vue environnemental a été réalisée sur D. magna pendant trois générations successives. Les résultats mettent en évidence une accumulation et un

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Coulson, I. M. "The effect of temperature on the properties of permanent magnet alloys of the NdFeBCo system." Thesis, University of Sunderland, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380706.

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Meier, Lori T. "The Effect of School Culture on Science Education at an Ideologically Innovative Elementary Magnet School." Digital Commons @ East Tennessee State University, 2010. https://dc.etsu.edu/etsu-works/5915.

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This ethnographic case study investigated how school culture influenced teachers curriculum design and science instruction at an elementary magnet school with an espoused innovative ideology. Data was analyzed using a theoretical framework that emphasizes five interdependent school culture indicators. Findings suggest that the schools culture hinders the effective teaching of science. Despite high levels of perceived efficacy from teachers and administrators, as well as generous lab space and materials to teach science, it was infrequently taught. Given a wide berth to plan their individual

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Wayman, Matthew C. "The Transfer of Volatiles Within Interacting Magmas and its Effect on the Magma Mingling Process." Kent State University Honors College / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ksuhonors1312924338.

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Kieffer, Christophe. "Conception optimale d’un système de refroidissement magnétocalorique à actionneur intégré : Application à la climatisation automobile." Thesis, Besançon, 2012. http://www.theses.fr/2012BESA2035/document.

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La technologie de la réfrigération magnétique présentée dans ce manuscrit constitue une alternative prometteuse à la technologie de production de froid. Le travail effectué a porté tout d’abord sur une étude de la production de froid magnétique et un état de l’art de cette technologie émergente. Nous nous sommes fixés pour objectif de dimensionner et réaliser un réfrigérateur magnétique qui se présente sous la forme d’un actionneur intégré. Le dimensionnement a été réalisé par le biais d’un modèle à éléments finis. Il s’agit d’un dispositif présentant deux entrefers, dont un suffisamment large

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Bourgeois, Jacob. "Modeling effects of adding a flux channel to a planar magnet-coil actuator." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32875.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (p. 38).<br>Planar magnet-coil actuators are used in many different MEMS devices. This report describes one way to improve the actuator range per current input of planar coil actuators. This is accomplished by adding a flux channel around and beneath the actuator's magnet. The Lorentz force is created by putting a current carrying planar coil over a magnet in an actuator assembly. The Lorentz force depends on the current vector and the magnetic field vector. In th

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Mccaskey, Alexander Joseph. "Effects of Electron-Vibron Coupling in Single-Molecule Magnet Transport Junctions Using a Hybrid Density Functional Theory and Model Hamiltonian Approach." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/48026.

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Recent experiments have shown that junctions consisting of individual single-molecule magnets (SMMs) bridged between two electrodes can be fabricated in three-terminal devices, and that the characteristic magnetic anisotropy of the SMMs can be affected by electrons tunneling through the molecule. Vibrational modes of the SMM can couple to electronic charge and spin degrees of freedom, and this coupling also influences the magnetic and transport properties of the SMM. The effect of electron-vibron coupling on transport has been extensively studied in small molecules, but not yet for junctions o

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Constantino, Carlos. "The effect of sewage effluent on trace metal speciation : implications for the biotic ligand model approach." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/7442.

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This research examined the suitability of the biotic ligand model (BLM) approach for assessing environmental risk in surface waters consisting substantially of treated sewage effluent, and the implications of its use within a compliance-based regulatory framework aimed at controlling discharges of metals into the aquatic environment. The results from a series of Daphnia magna acute copper toxicity assays conducted in an undiluted sewage effluent medium demonstrated that BLMs could predict an acute copper toxicity endpoint with suitable accuracy. This finding contributes further support for the

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