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Chou, Hsin. "Von der Differenz zur Alterität : das Verhältnis zum Anderen in der Fortschreibung von Identitätssuche in den Romanen Die Überläuferin und Stille Zeile sechs von Monika Maron." Freiburg, Br. [Rombach], 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3004758&prov=M&dokv̲ar=1&doke̲xt=htm.
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Persson, Jacob. "Magnon-Phonon Coupling." Thesis, Uppsala universitet, Materialteori, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-377297.
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Recent experimental and theoretical studies have found evidence of coupled interactions between magnons and phonons. The aim of this study is to construct a model of coupled magnons and phonons, as well as analysing their frequency spectrum. The model is derived by quantizing spin and lattice degrees of freedom, and the frequency spectrum is derived by solving the equations of motion. We found that both the strength and the composition of the coupled interactions affect the frequencies of magnons and phonons, with emphasis on the magnons. Their frequencies are imaginary close to the center of the Brillouin zone, which opens questions for future research.
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Mook, Alexander [Verfasser]. "Topological magnon materials and transverse magnon transport : [kumulative Dissertation] / Alexander Mook." Halle, 2017. http://d-nb.info/1142155307/34.
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Ertl, Nancy, and Zossi Zdravkovic. "En påse på magen." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-26791.
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Bakgrund: Att få en stomi är en stor kroppslig förändring som påverkar det dagliga livet. Detta kan göra de flesta patienter osäkra och påverka självbilden. Sjukdom som kan kräva en stomioperation är Kolorektalcancer, vilket är vanligt i västvärlden. I Sverige förekommer årligen ca 3000 nya fall av koloncancer och ca 1700 fall av rektalcancer. Det är sjuksköterskans ansvar att informera och undervisa patienter samt förvissa sig om att patienten förstår given information. Sjuksköterskan ska även uppmärksamma patienter som ej själva uttrycker informationsbehov eller har speciella informationsbehov. Syfte: Att genom en litteraturstudie belysa stomiopererades erfarenheter av bemötande och information från vårdpersonal. Metod: Litteraturstudien utfördes enligt viss systematik och all data som presenteras i resultatet kommer från vetenskapliga studier som primärkällor. För att finna bästa möjliga forskningsresultat inom det valda ämnet utfördes sökningar i databaserna CINAHL och PubMed. Resultatet baserades på sju vetenskapliga studier. De teman som utsågs i studierna var bemötande, information samt kroppsuppfattning och sexualitet. Resultatet visade att det var viktigt att bli bemött som en unik individ. Deltagarna i studierna uttryckte vikten av att deras frågor blev tagna på allvar och att de fick svar. Patienter som upplevde sig ha haft en dialog med vårdpersonalen upplevde att de själva kunde fatta beslut eller lämna över detta till vårdpersonalen. Bristfällighet i informationen orsakade frustration och osäkerhet som påverkade patienternas förståelse av beslut och vad dessa tillförde. Många kände sig främmande för stomin när de först såg den. En känsla av att vara annorlunda, minskad självrespekt och självkänsla beskrevs samt avsky och emotionell chock. Både män och kvinnor uppgav oro över sexuallivet och att de kände sig mindre attraktiva.Background: To get a stoma is a big bodily change that affects everyday life. This can make most patients unsure of themselves and affect self-image. One disease that can result in a stoma operation is Colorectal cancer, which is common in the western world. In Sweden, around 3000 new cases of colon cancer and approximately 1700 cases of rectal cancer are discovered. It is the nurses’ responsibility to educate and inform patients and to be sure that the patient understands the given information. The nurse should also notice patients that do not express information needs or have special information needs. Aim: through a literature review, to illuminate the experiences of those has undergone a stoma operation regarding treatment and information given from healthcare staff. Method: The literature review was carried out according in a systematic way and all data represented in the result comes from scientific studies as primary sources. To find the best research result within the chosen subject searches were made in the CINAHL and PubMed databases. The result was based on seven scientific articles. The themes chosen in the studies were treatment, information and body image and sexuality. The result showed that it was important to be treated like a unique individual. The participants in the studies expressed the importance of their questions being taken seriously and that they were answered. Patients that felt that they had had a dialog with the health care staff felt that they could make their own decisions or leave this over to the health care staff. A lack of information caused frustration and uncertainty that affected patients understanding of decisions and what they brought. Many felt alienated by the stoma when they first saw it. A feeling of being different, lack of self-respect and self-esteem was described, along with disgust and emotional chock. Both men and women mentioned anxiety over their sex-life and that they felt less attractive.
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Nielsen, Larsson Emma. "En klump i magen." Thesis, Malmö högskola, Lärarutbildningen (LUT), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-34903.
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Mobbning är ett problem som rör såväl vuxna som barn. Skolan är en plats där alla ska känna sig trygga ändå går många barn dit med en klump i magen. Arbetet mot mobbning ställer stora krav på skolorna och det krävs kunniga och engagerade lärare. Genom att lyssna på vad elever har för tankar kring ämnet kan pedagoger dra stor lärdom. Syftet och frågeställningen med detta arbete är att ta del av vad elever har för tankar kring mobbning. Resultatet baseras på den enkät jag låtit elever i årskurs 3-5 svara. Arbetet redogör också för tidigare forskning kring ämnet. Jag tar också upp identitetsteori och sociala grupper. Slutsatsen är att många av eleverna någon gång har känt sig retade, utanför och ensamma. Några har även blivit slagna. Ytterst viktigt är att man tar barnen på allvar, även om det de upplever inte klassas som mobbning. Det visade sig att många av eleverna var väldigt öppna i sina svar och slutsatsen jag drar av detta är att det på var skola bör finnas enkätundersökningar för att ta reda på hur stämningen i klassen är. Viktigt när jag gjorde detta arbete var att lärarna i de berörda klasserna valde att följa upp min undersökning. Barnens tankar och erfarenheter kring mobbning väckte en del frågor hos mig men även förståelse för hur de tänker.
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Bondesson, Ida, and Ida Rovin. "Lite historia rensar magen." Thesis, Malmö högskola, Lärarutbildningen (LUT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-28111.
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Vi har valt att göra vårt examensarbete i form av ett utvecklingsarbete där ett ämnesövergripande projekt har planerats och genomförts. Utgångspunkten för projektet har varit SVT:s “Historieätarna”. Syftet har varit att undervisa utifrån “den lilla historien” för att fördjupa elevers historiemedvetande och historiska intresse samt att levandegöra historien genom att låta eleverna laga och äta mat från 1800-talets Sverige. De ämnen vi har valt att förena är det teoretiska ämnet historia och det mer praktiskt orienterade ämnet hem- och konsumentkunskap. Genom intervjuer med lärare, observation av lektioner och elevenkäter har vi undersökt vilken nytta man kan dra av ett projekt som vårt. Projektet genomsyras av begreppen “den lilla historien”, historiemedvetande och intresse. Resultatet visar att både lärare och elever gagnas av ämnesövergripande arbete i skolan förutsatt att man är villig och har möjlighet att lägga tid på det. Att anlägga ett underifrånperspektiv på historieundervisningen och att utgå ifrån ”den lilla historien” och elevens vardag då man undervisar i historia visar sig vara ett bra upplägg för elever då det är lättare att förstå stora sammanhang om man börjar i någonting man redan känner till.
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Addison, Joan Elizabeth. "William Mason : a study." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/william-mason-a-study(c6999db0-6aaf-4f9a-958a-f3094d1f5589).html.
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This thesis is an examination of the work of William Mason, an eighteenth-century poet who, though highly regarded in his own time, is little known in ours. The thesis seeks to revalidate Mason as a poet worthy of attention in the twenty-first century. The Introduction contextualises Mason, both socially and culturally. Emphasis is given to the importance of Whig politics in his life and works, and to the influence upon him from an early age of the philosophy of John Locke. Attention is also drawn to Mason’s ability as an innovative adaptor of ancient genres, the importance to him of Milton’s verse, and the relevance of his ‘public’ poetry to modern Britain. The first part of Chapter One provides an overview of Mason’s poetic trajectory, from his popularity in the eighteenth century to his decline in the nineteenth. The general loss of interest in eighteenth-century poetry, and its revival in the twentieth, is considered. In the second part of the chapter, Mason’s youthful poetic claim to be the literary and moral descendant of Milton and Pope is examined in the context of his early monody, and its innovative purpose and style. Attention is drawn to the intertextuality that informs much of the poetry discussed in this thesis. The treatment of the Pindaric ode in the hands of earlier poets, and Mason’s far more authentic one, are subsequently discussed. Examples are given which illustrate Mason’s successful treatment of the genre, and of his concern with the preoccupations of the age. In Chapter Two Mason’s georgic, The English Garden, is examined. Consideration is given to Mason’s choice of Miltonic form, to the poet’s employment of his subject, gardening, as a representation of the state of the nation, and to the poet’s personal involvement in the verse in a variety of manifestations. His success in matching subject to form is demonstrated. Mason’s correspondence with Walpole concerning the American war, his collaboration with William Burgh, and his use of prose as well as poetry for political purposes, are discussed. Chapter Three provides a brief account of the attitudes to satire from the late seventeenth century to Pope’s death, and goes on to look at Mason’s own satire. His satires are discussed in the context of his political and literary relationships with Walpole, Gray, Pope and Churchill, and his concern with the issue of slavery is foregrounded. The individual satires are examined, and examples explored of Mason’s novel and varying employment of the genre in the service of his Whig viewpoint. The Conclusion draws together the points made in the body of the text, and claims a place for Mason amongst the eighteenth-century poets rediscovered by recent scholarship.
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Strehlow, Kimberly Anni. "(Re)casting the self in memory narratives Monika Maron's Stille Zeile sechs, Animal triste and Pawels Briefe /." Bowling Green, Ohio : Bowling Green State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1241134994.
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Rodrigues, Lindon Johnson Freitas. "Frases magn?ticas, polaritons magn?ticos e modos magnetost?ticos em filmes e cristais magn?nicos de terras-raras." Universidade Federal do Rio Grande do Norte, 2015. http://repositorio.ufrn.br/handle/123456789/21011.
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Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Neste trabalho, primeiramente abordamos o estudo das fases magn?ticas em filmes finos e ultrafinos de H?lmio (Ho) no intervalo de temperatura entre 20K e 132 K, onde mostramos que o tamanho do filme, os efeitos de superf?cie e a aplica??o do campo magn?tico externo alteram significativamente o diagrama de fases magn?ticas de terra-rara. Tamb?m constatamos uma redu??o correspondente a intensidade do campo magn?tico externo necess?rio para saturar a magnetiza??o e para filmes ultrafinos o estado helicoidal n?o ir? se formar. Usamos o calor espec?fico e a susceptibilidade magn?tica como ferramentas auxiliares para explorar e discutir a natureza das transi??es de fase na presen?a de campo magn?tico externo, temperatura e efeitos magn?ticos externos. Neste caso a presen?a de um campo externo d? origem as fases magn?ticas Fan e Spin slip. Em seguida, estudamos os pol?ritons magn?ticos, que s?o excita??es elementares em cristais, em multicamadas peri?dicas compostas do terra-rara Dispr?sio (Dy) e Fluoreto de zinco (ZnF2), que define um cristal magn?nico. Na presen?a de um campo magn?tico externo e em uma determinada temperatura, os efeitos do comportamento efetivo dos pol?ritons magn?ticos fazem surgir novos modos de superf?cie. Tamb?m, no estudo dos pol?ritons de volume, surge uma regi?o de dispers?o, que ? bastante conhecida na literatura dos grafenos, como regi?o de ?gap zero?. Apresentamos ainda um estudo dos modos magnetost?ticos para complementar nossos resultados. Essas novas propriedades s?o explicadas pelo comportamento efetivo dos pol?ritons magn?ticos em uma multicamada peri?dica. Usando o modelo do meio efetivo podemos explicar, por exemplo, o comportamento an?malo (hiperb?lico) na rela??o de dispers?o dos pol?riotns magn?ticos. Em suma, discutimos os resultados e apresentamos novas perspectivas para o estudo dos pol?ritons e modos magnetost?ticos nessa nova ?rea de pesquisa, chamada de cristais magn?nicos.
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McCabe, Cathal. "The poetry of Derek Mahon." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249904.
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Sigmon, Ashley. "Manon and the Chevalier d'Or." OpenSIUC, 2017. https://opensiuc.lib.siu.edu/theses/2144.
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Lathuillière, Marjorie. "Influence de la fragmentation des populations et des stratégies de reproduction et de dispersion sur la diversité génétique des populations de magots(macaca sylvanus)." Tours, 2002. http://www.theses.fr/2002TOUR4013.
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L'influence des stratégies de dispersion et de reproduction et de la fragmentation des populations sur les caractéristiques génétiques des magots (Macaca sylvanus) a été étudiée. Dans un groupe, plusieurs mâles se reproduisent chaque année. Quand un groupe atteint une grande taille, sa cohésion sociale diminue, entraînant sa division qui se fait entre lignées matriarcales et selon des relations affiliatives préalables entre femelles. Bien que les femelles soient philopatriques et que les mâles migrent, les degrés d'apparentement femelle-femelle et mâle-mâle sont voisins et faibles dans un groupe en accroissement. La division d'un groupe entraîne un apparentement intra-groupe élevé entre femelles. Elle contribue à une augmentation de la différenciation génétique inter-groupes tandis que les stratégies de reproduction et de dispersion des mâles favorisent le brassage. La structure génétique des populations dépend de l'équilibre entre ces processus. Les caractéristiques sociales du magot expliquent sans doute la bonne diversité génétique de l'espèce malgré la fragmentation de ses populations, mais la diversité allélique diminue avec leur tailleWe studied whether the fragmentation of populations and behavioural strategies influenced the genetic characteristics of Barbary macaques (Macaca sylvanus). In a given group, several males were involved in reproduction every year. While reaching a maximum size, group fissioned due to a decrease in social cohesion. This occurred between matrilines and respected the affiliative relationships between females before splitting. Although females are philopatric and males disperse, in a growing group, the within-group relatedness between females and between males didn't greatly differ and were low. On the contrary, group fission greatly increased female-female relatedness. Fission contribute to the genetic structuring of populations whereas reproduction and dispersal strategies favour gene mixing. The genetic structure results from a balance between these two processes. Social characteristics of Barbary macaques likely explain their relatively high level of genetic diversity despite the fragmentation of their populations, but the allelic diversity is varied with population size
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Cloke, Tsui Ho-ning. "The world around Suzie Wong." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38698353.
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Queudeville, Manon [Verfasser]. "Uteroglobinexpression in präimplantativen Kaninchenembryonen / Manon Queudeville." Aachen : Shaker, 2008. http://d-nb.info/1161303464/34.
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António, Bruno Alexandre Zeverino. "Coherent magnon transport through magnetic nanoclusters." Master's thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13761.
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Mestrado em FísicaThe main goal of this thesis is to study the transmittance of single magnons through magnetic nanoclusters. Our approach relies on the Matsubara-Matsuda transformation, which maps a magnonic circuit of a magnetic cluster connected to 1D leads into a hard-core boson system. The transmittance of non-interacting magnons is computed by solving a system of Nc +2 coupled Schrödinger equations (where Nc is the number of sites of the cluster). In the case of interacting magnons an approximate method was followed which relies in a similar tunnelling perspective. We address the e ects in the transmittance of the quantum interference of the magnonic modes, variable coordination number in the cluster, and the possibility of di erent magnetizations of the nanocluster. Zeeman splitting and anisotropies (J 6= Jz) are also addressed but dipole-dipole interactions are not considered. The transmittance of magnons through a frustrated magnetic cluster is discussed.
O objetivo principal desta tese é estudar a transmitância de magnões únicos através de nanoaglomerados magnéticos. A nossa abordagem baseia-se na transformação de Matsubara-Matsuda, que mapeia um circuito magnónico de um aglomerado magnético ligado a os unidimensionais num sistema de bosões hard-core. A transmitância de magnões sem interação é calculada através da resolução de um sistema de Nc + 2 equações de Schrödinger (onde Nc é o número de sítios do circuito). No caso de magnões com interação foi seguido um método aproximado baseado numa perspectiva de efeito túnel similiar. São discutidos os efeitos na transmitância causados pela interferência quântica dos modos magnónicos, número de coordenação variável no aglomerado e a possibilidade de diferentes magnetizações do aglomerado. É também discutido em detalhe a transmitância de magnões através de clusters magnéticas frustradas.
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Nevole, Josef. "Dvouosý pohon s EC motory Maxon." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217619.
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The content of this master´s thesis is compact complex piece of knowledge from semestral projects 1 and 2. These semestral projects deal with analysis two-axle servo - drive, most common methods design regulators, design regulators and their simulation. Further was analysed quality regulation integral criteria, whereupon connect simulation circular and linear interpolation. Simulation was effected by force of Matlab Simulink. In one’s chapter was tested effect feedforwards to regulation. In closing parts is acquaint with control section position EPOS, and programming environment Open PCS company Maxon. In this environment was biaxial drive with EC motors Maxon and control section EPOS P 24/5 programmed. Results was discusseds with simulation.
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Boll, Katharina. "Erinnerung und Reflexion : retrospektive Lebenskonstruktionen im Prosawerk Monika Marons /." Würzburg : Königshausen & Neumann, 2002. http://catalogue.bnf.fr/ark:/12148/cb388767747.
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Teusch, Christian. "Die einreihige fortlaufende Allschichtnaht am Magen-Darmtrakt." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=969073917.
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Hegel, Karl [Verfasser]. "De Aristotele et Alexandro Magno / Karl Hegel." Berlin : Humboldt-Universität zu Berlin, 2000. http://d-nb.info/1183000952/34.
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Boventer, Isabella Rahel [Verfasser]. "Cavity Magnon-Polariton Spectroscopy / Isabella Rahel Boventer." Mainz : Universitätsbibliothek Mainz, 2019. http://d-nb.info/1196893624/34.
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Marcus, Stålhammar. "Band Structures in Magnon-Phonon Coupled Systems." Thesis, Uppsala universitet, Materialteori, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-304823.
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Jatoba, Luciana de Jesus. "Alelopatia em Pteridium arachnoideum (Kaulf.) Maxon. (Dennstaedtiaceae)." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/7979.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Pteridium plants are ferns (monilopytes) distributed all around the globe. These plants are considered problem species as they invade recently abandoned or burned areas, and areas under anthropogenic impacts. In Brazil, Pteridium arachnoideum (Kaulf.) Maxon. has become an important problem species at the Cerrado (Tropical Savanna) and Atlantic Forest biomes. To understand the mechanisms underlying invasive plants success are one of the greatest challenges of the last decades. Among the interaction that can influence this success, we find allelopathy. However, untill now we have few evidences for this phenomenon on these plants, especially from the isolation and indentification of secondary metabolites with activities related to allelopathy. Therefore, the present work aimed to evaluate the allelopathy role by direct phytotoxicity and abiotic changes in Pteridium arachnoideum (Kaulf.) Maxon. dominance in the areas it invades. To do so, the bioguided phytochemical study of this plant tissues and litter was performed, as well as the evaluation of the phytotoxic activity of phenolic compounds present in its litter and of its isolated and identified secondary metabolite against the early development of sesame, verifying the presence of this compound in the soil, its quantification, and evaluation of its interactions with physical and chemical soil characteristics. The phytochemical study led to the isolation and identification of a majoritarian compound in the plants green fronds and litter, the proanthocianidin selligueian A. This is the first time this compound is described for P. arachnoideum, as well as for the Dennstaediaceae family. Selligueain A showed phytotoxic activity against wheat coleoptiles elongation, with inhibitory activity over 71%, and IC50 of 0.69 mM. The poliphenols enriched fraction extracted from P. arachnoideum litter exert inhibitory activity against the early development of bioindicators species, native and invasive species of the Cerrado biome, specially over the development of these seedlings roots, besides activity against the metaxylem cells of sesame, and against chlorophyll content of sesame and the native weed Setaria parviflora. The allelopathic potential of the main poliphenolic compound of P. arachnoideum, selligueain A, was also evaluated against the early growth of sesame seedlings, promoting root and shoot growth in all the concentrations tested. Sesame seedlings grown in the presence of selligueain A showed smaller metaxylem cells when compared to the control, in the concentrations of 0.3 mM e 1 mM, with 50.82% inhibition in the greatest concentration and IC50 value of 0.98 mM. There was no activity of selligueain A against chlorophyll content of these seedlings. Analyses of extracts of soil collect under a P. arachnoideum patches pointed to the presence of selligueain A as major compound in soil solution, and, therefore, as a putative allelochemical produced by this plant. The concentration observed for this compound in the soil raged between 0.02 and 0.65 mM. According to allelopathic potential results, this concentration rage is sufficient to act over cooccurring plant species, promoting P. arachnoideum dominance. The presence of P. arachnoideum in Cerrado areas alters the chemical conditions of the soil, especially regarding N and Al, when compared to the presence of U. decumbens. Additionally, Al concentration is correlated to litter mass and to selligueain A concentration at the sites sampled. These results corroborates the hypothesis of allelopathy as a dominance mechanism of this plant in the areas where it occurs, with the first report of an allelochemical for a Pteridium species, by direct phytotoxic activity as well as by controlling Al concentration at those areas.
Plantas do gênero Pteridium são samambaias (monilófitas) e estão distribuídas em todo mundo. São consideradas espécies problemas pois invadem áreas recentemente queimadas, abandonadas ou sob impacto antrópico. No Brasil, Pteridium arachnoideum (Kaulf.) Maxon. apresenta-se como uma importante espécie problema do Cerrado e da Mata Atlântica. Compreender os mecanismos que governam o sucesso de plantas com comportamento invasor tem se mostrado um dos maiores desafios das últimas décadas. Dentre as interações que podem influenciar este sucesso está a alelopatia. No entanto, poucas são as evidências apresentadas até então para este fenômeno, especialmente a partir do isolamento e identificação de substâncias do metabolismo secundário destas plantas. Assim, o objetivo deste trabalho foi avaliar o papel da alelopatia por fitotoxicidade direta e alterações abióticas na dominância de P. arachnoideum nas áreas em que ocorre. Para isso, foi realizado estudo fitoquímico biodirigido de diferentes órgãos e serrapilheira desta planta, avaliação da atividade fitotóxica dos polifenóis e do metabólito secundário isolado e identificado sobre o desenvolvimento inicial da espécie bioindicadora gergelim, identificação da presença deste composto no solo, sua quantificação e avaliação de sua interação com características físicoquímicas do solo. O estudo fitoquímico levou ao isolamento de um composto majoritário presente em suas frondes verdes e serrapilheira desta planta, a proantocianidina selligueina A. Esta é a primeira vez que este composto é descrito para P. arachnoideum, assim como para a família Dennstaediaceae. A selligueina A apresentou atividade fitotóxica sobre o alongamento de coleóptilos de trigo, com atividade inibitória acima de 71%, e IC50 de 0,69 mM. A fração enriquecida em polifenóis extraídos da serrapilheira de P. arachnoideum exerceu atividade inibitória sobre o desenvolvimento inicial de espécies bioindicadoras, nativa e invasora do Cerrado, especialmente sobre o desenvolvimento das raízes dessas plântulas, e atividade sobre as células do metaxilema de gergelim, e sobre o conteúdo de clorofila de gergelim e de capim rabo-de-raposa. O potencial alelopático do principal composto polifenólico desta planta, selligueina A, também foi testado sobre o crescimento inicial de gergelim, promovendo inibição do comprimento final do caule e da raiz de plântulas de gergelim em todas as concentrações testadas. Plântulas de gergelim crescidas na presença de selligueina A apresentaram células do metaxilema menores do que o as do controle nas concentrações de 0,3 mM e 1 mM, com inibição de 50,82% na maior concentração e IC50 de 0,98 mM. Não houve atividade de selligueina A sobre o conteúdo de clorofila dessas plântulas. Análises dos extratos de solo coletado sob manchas de P. arachnoideum apontaram a presença de selligueina A como composto majoritário na solução do solo, e, portanto, como aleloquímico produzido por esta planta. As concentrações do composto no solo variaram entre 0,02 e 0,65 mM. De acordo com resultados de potencial alelopático essa faixa de concentração seria suficiente para potencialmente atuar sobre espécies co-ocorrentes, favorecendo a dominância de P. arachnoideum. A presença de P. arachnoideum em áreas de Cerrado altera condições químicas do solo, especialmente com relação à concentração do nutriente N e de Al, quando comparada à presença de braquiária (U. decumbens). Além disso, a concentração de Al se encontra correlacionada à massa de serrapilheira e à concentração de selligueina A nas áreas amostradas. Estes resultados corroboram a hipótese de alelopatia como mecanismo de dominância dessa planta nas áreas em que ocorre, com a primeira descrição de um aleloquímico para uma espécie do gênero Pteridium, que apresenta atividade não apenas por fitotoxicidade direta, mas também por ação indireta, ao controlar a concentração de Al nessas áreas.
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Luvualo, Nginamau Engrácia Simão. "Recrutamento e seleção na Macon Transportes, LDA." Master's thesis, Instituto Superior de Economia e Gestão, 2016. http://hdl.handle.net/10400.5/12534.
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Mestrado em Gestão de Recursos HumanosO presente Trabalho Final de Mestrado reflete no desenvolvimento de um estágio curricular, com duração de três meses na área de Recursos Humanos, departamento de Recrutamento e Seleção da empresa Macon Transportes Lda. O objetivo deste trabalho passa pela apresentação detalhada das atividades relacionadas com o processo de recrutamento e seleção desenvolvidas na empresa Macon. O desafio atual é a condução do processo de contratação que, na maioria das vezes é falho por falta de critérios e instrumentos adequados e que na maioria das vezes pode gerar grandes perdas financeiras e perda de tempo. Desta feita, a primeira parte do relatório é dedicado ao enquadramento teórico, seguindo-se uma breve apresentação da instituição (MACON Transportes, Lda.), na terceira parte, foram apresentadas e detalhadas as atividades realizadas ao longo do estágio, e subsequentemente na quarta foram pormenorizadas as atividades desenvolvidas na empresa no período do estágio e por fim, foram elaboradas as discussões e conclusões e apresentadas as limitações e sugestões. O objetivo final do relatório de estágio é descrever as funções exercidas e as tarefas efetuadas, explicitando a relação entre a formação obtida ao longo do curso de mestrado e a sua aplicação no trabalho na empresa.
This present Masters Degree Final Work, reflects the development of an curricular internship, with a duration of three months in Human Resources area, department of Recruitment and selection of Macon Transport Lda company. The objective of this work goes through the detailed presentation of activities related to the procedure for recruitment and selection developed in Macon Company. . The current challenge is to leading the hiring process that most of the times it´s flawed for lack of criteria and instrument that in most of the times can cause great financial and time losses. By this, the first part of the report is dedicated to the theoretical framework, followed by a brief presentation of the institution (MACON Transportes, Lda.), in the third part, we were presented and detailed the activities carried out throughout the internship, and subsequently in the fourth they were detailed the activities developed at the company at internship period and finally were prepared the discussions and conclusions and brought the limitations and suggestions. The ultimate goal of internship report is to describe the functions exercised and performed tasks, explaining the relation between the training obtained along master course and its application at work in the company
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Hegel, Karl von [Verfasser]. "De Aristotele et Alexandro Magno / Karl Hegel." Berlin : Humboldt-Universität zu Berlin, 2000. http://nbn-resolving.de/urn:nbn:de:kobv:11-100246286.
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Scheffs-Endres, Barbara. "Sonate nº 2 e sonatine de Milosz Magin: a ideia do compositor na interpretação do executante." Doctoral thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/11959.
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This Doctoral Thesis is the first study about the interpretation of the Sonate Nº2 and the Sonatine for piano composed by Milosz Magin (1929-1999). The composer was also an excellent pianist and a great interpreter of the works of Frédéric Chopin. The dissertation combines the scores and the recordings of the Sonate Nº2 and the Sonatine made by Milosz Magin, shares them with the reader, interprets them and therefore, presents a personal conception about the interpretation of these works. The understanding of the composer's musical language, obtained through the analysis of the compositional processes of Milosz Magin and piano interpretations recorded by him is the basis for the interpretation of the Sonate Nº2 and the Sonatine. The individual and practical organization of these works made by the author of the dissertation takes into consideration this basis. Besides registering the author's personal experience of the said works, the dissertation has also the aim of helping other interpreters to find their own interpretative expressions regarding these pieces. Therefore, this dissertation starts from the point of view of the performer and it is written in a form of 'practical guide', which includes the examples in multimedia format, i.e., in video and audio formats;
Resumo:
Esta tese de doutoramento é o primeiro estudo sobre a interpretação quer da Sonate Nº2 quer da Sonatine para piano do compositor Milosz Magin (1929-1999). Milosz Magin foi também um excelente pianista e um grande intérprete das obras de Frédéric Chopin. Reunindo as partituras e gravações da Sonate Nº2 e da Sonatine, realizadas por Milosz Magin, esta tese compartilha-as com o leitor, analisa-as e em consequência apresenta uma concepção pessoal da interpretação das referidas obras. O entendimento da linguagem musical do compositor, obtido através da análise dos processos composicionais e das interpretações pianísticas gravadas por Milosz Magin, constitui o fundamento para a interpretação da Sonate Nº2 e da Sonatine. A elaboração prática destas obras, realizada pela autora, leva em consideração a dita base. Esta experiência está documentada e tem também o objectivo de ajudar outros intérpretes a que encontrem as próprias expressões interpretativas destas peças musicais. Sendo assim, este trabalho parte do ponto da vista do executante e está escrito na forma dum guia prático, que inclui exemplos em formatos áudio e vídeo.
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Ara?jo, Carlos Alexandre Amaral. "Polaritons em materiais magn?ticos nanoestruturados." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16662.
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Previous issue date: 2007-06-15In this work we present a theoretical study about the properties of magnetic polaritons in superlattices arranged in a periodic and quasiperiodic fash?ons. In the periodic superlattice, in order to describe the behavior of the bulk and surface modes an effective medium approach, was used that simplify enormously the algebra involved. The quasi-periodic superlattice was described by a suitable theoretical model based on a transfer-matrix treatment, to derive the polariton's dispersion relation, using Maxwell's equations (including effect of retardation). Here, we find a fractal spectra characterized by a power law for the distribution of the energy bandwidths. The localization and scaling behavior of the quasiperiodic structure were studied for a geometry where the wave vector and the external applied magnetic field are in the same plane (Voigt geometry). Numerical results are presented for the ferromagnet Fe and for the metamagnets FeBr2 and FeCl2
Neste trabalho apresentamos um estudo te?rico sobre as propriedades dos polaritons magn?ticos em super-redes organizadas em padr?es peri?dico e quasiperi?dico. Na super-rede peri?dica, objetivando descrever o comportamento destes modos, tanto no volume quanto na superf?cie, foi utilizada a teoria do meio efetivo, que facilita enormemente a ?lgebra envolvida. Para a superrede quasi-peri?dica usamos um conveniente modelo te?rico baseado no trata mento da matriz-tranfer?ncia, para derivar a rela??o de dispers?o, utilizando as equa??es de Maxwell (incluindo efeitos de retardamento). Aqui, encontramos um espectro fractal caracterizado por uma lei de pot?ncia para a distribui??o de bandas de energia. A localiza??o e o comportamento de escala da estrutura quasi-peri?dica s?o estudadas numa geometria onde o vetor de onda e o campo aplicado est?o no mesmo plano (geometria de Voigt). Resultados num?ricos s?o apresentados para o ferromagneto Fe e para os metamagnetos FeBr2 e FeCl2
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Silva, Ubiratan Correia. "Produ??o e estudo de multicamadas magn?ticas em substrato flex?vel." Universidade Federal do Rio Grande do Norte, 2015. http://repositorio.ufrn.br/handle/123456789/20691.
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Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq)
Multicamadas magn?ticas s?o a base para a produ??o de dispositivos spintr?nicos e possuir o dom?nio na produ??o de tais multicamadas ? fundamental para obter avan?os nesta ?rea, e nos ?ltimos anos est? em destaque a produ??o de dispositivos spintr?nicos flex?veis. Devido a essa tend?ncia, o objetivo do presente trabalho ? produzir multicamadas magn?ticas depositadas em substrato flex?vel utilizando a t?cnica de Magnetron sputtering dc. Tr?s conjuntos de amostras foram confeccionados. O primeiro conjunto, constitu?do de tricamadas do tipo CoFe=Cu(t)=CoFe com diferentes espessuras do espa?ador met?lico. O Segundo conjunto, composto por dois subgrupos de multicamadas CoFe=Cu com a presen?a do IrMn como buffer layer ou cap layer. O terceiro conjunto, constitu?do por multicamadas de Permalloy (Py=Ta e Py=Ag) em substrato da Kapton e substrato de vidro. Para a investiga??o das propriedades magn?ticas, foram realizadas medidas de magnetometria de amostra vibrante, resson?ncia ferromagn?tica e magnetoimped?ncia (MI). Todas executadas em temperatura ambiente e com campo magn?tico aplicado sempre no plano da amostra. Para a an?lise estrutural, a t?cnica de difra??o de raios-X foi usada. Os resultados das tricamadas mostraram a apresen?a de uma anisotropia uniaxial, para a amostra com espa?ador de 4;2 nm. Para a multicamada com a presen?a do IrMn entre a camada buffer e FM, os resultados das propriedades magn?ticas est?ticas e din?micas apresentaram comportamento isotr?pico. Para a multicamada com a presen?a do IrMn entre a camada FM e a cap layer, os resultados das propriedades magn?ticas est?ticas apresentaram o comportamento magn?tico de uma estrutura tipo v?lvula de spin. Entretanto houve uma diverg?ncia com resultados das medidas de resson?ncia ferromagn?tica, a qual foi justificada devido ? contribui??o dos gr?os inst?veis e est?veis para a anisotropia rod?vel e anisotropia de polariza??o (Exchange bias) na interface ferromagn?tica-antiferromagn?tica. Para a terceira s?rie de amostras, os resultados apresentaram comportamentos semelhantes da MI cujo espa?ador foi a prata (Ag), para ambos os substratos e varia??o significativa nas amostras com o espa?ador por Ta onde foi poss?vel associar a varia??o da magnetoimped?ncia entre os substratos de vidro e flex?vel, ao estresse compressivo na amostra de substrato flex?vel.
Magnetic multilayers are the support for the production of spintronic devices, representing great possibilities for miniaturized electronics industry. having the control to produce devices as well as their physical properties from simple multilayer films to highly complex at the atomic scale is a fundamental need for progress in this area, in recent years has highlighted the production of organic and flexible spintronic devices. Because of this trend, the objective of this work was to produce magnetic multilayers deposited on flexible substrate using magnetron sputtering dc technique. Three sets of samples were prepared. The first set composed of the trilayer type CoFe=Cu(t)=CoFe with different thickness of the metallic spacer. The second set consists of two multilayer subgroups, CoFe=Cu in the presence of IrMn layer as a buffer and the next multilayer as cap layer. The third set consisting of non-magnetostrictive multilayer permalloy (Py=Ta and Py=Ag) on flexible substrate and glass. The magnetic properties, were investigated by magnetometry measurements, ferromagnetic resonance and magnetoimpedance (MI), measurements were carried out at room temperature with the magnetic field always applied on the sample plane. For structural analysis, the diffraction X-ray was used. The results of the trilayer showed a high uniaxial anisotropy field for the sample with a spacer of 4.2 nm. For the multilayer in the presence of IrMn layer as the buffer, the study of static and dynamic magnetic properties showed isotropic behavior. For the multilayer in the presence of IrMn layer as a cap, the results of static magnetic properties of the magnetic behavior exhibited a spin valve structure type. However there was a disagreement with results of ferromagnetic resonance measurements, which was justified by the contribution of the unstable and stable grain to the rotatable anisotropy and Exchange bias in ferromagneticantiferromagnetic interface. The third serie of samples showed similar results behavior for the MI Ag multilayers spacer in both substrates. There are also significant MI changes with the Ta spacer, possible associated with the compressive stress on the flexible substrate sample.
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Hutchison, Paul. "Discursive life in Thomas Pynchon's Mason & Dixon." Connect to resource, 2006. http://hdl.handle.net/1811/6492.
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Thesis (Honors)--Ohio State University, 2006.Title from first page of PDF file. Document formatted into pages: contains 60 p. Includes bibliographical references (p. 58-60). Available online via Ohio State University's Knowledge Bank.
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Rochlitz, Helmut. "Molekulare Charakterisierung der Muskarinrezeptoren in Magen- und Dickdarmschleimhaut." [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=962763454.
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Mason, Shayne William. "The metabolomics of acute alcohol abuse / S.W. Mason." Thesis, North-West University, 2010. http://hdl.handle.net/10394/5034.
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Alcohol is a substance used and abused by many individuals. The metabolic perturbations caused by excessive alcohol consumption are widespread throughout the human body. One of the primary consequences of alcohol abuse, particularly acute alcohol abuse, is very high levels of NADH formed from excessive ethanol oxidation. A high NADH:NAD+ ratio shifts the redox potential of the cells, shifting the normal physiological equilibrium, particularly within NAD-dependent dehydrogenase-catalyzed reactions. These particular reactions occur within various metabolic pathways, such as: citric acid cycle, glycolysis and branched-chain amino acid catabolism. As such, a disruptive effect within these metabolic pathways results in the slight accumulation of perturbation markers that can be associated with alcohol abuse. Isolation and identification of these widespread perturbation markers is difficult as they only occur in quantities only slightly higher than normal physiological values. Metabolomics makes for a very aptly used technique as it takes a holistic approach, taking into consideration the entire metabolic profile; and, with the aid of bioinformatics, is able to isolate and identify particular variables/metabolites of interest and accredit them as the variables responsible for the greatest variation between control and experimental groups. A novel approach used within this investigation effectively reduced the voluminous metabolomics data generated allowing for more efficient multivariate analysis. Application of three separate statistical models, namely: (1) Unfolding PCA, (2) Cross-sectional PCA, and (3) ANOVA Simultaneous Component Analysis (ASCA), were used for analyzing the complex 3-dimensional data set created within this acute alcohol abuse investigation. Each model presented certain strengths and difficulties. Taking into consideration the results from all 3 models, the first phase of this investigation confidently illustrates the differentiation between control cases and individuals administered an acute alcohol dose and, subsequently allow for variables responsible for this separation to be: identified as variables of importance, selected and categorized into specific pathways and, finally, labelled as perturbation markers. Through experimental observation it was noted that a large number of perturbation markers associated with the branched-chain amino acid pathway were present within the experimental cases. A hypothesis was created from this observation, re-enforcing the principle that metabolomics is a hypothesis-generating system. The subsequent second phase of this investigation involves a targeted experimental protocol aimed at evaluating the proposed hypothesis, with a focus on three secondary metabolites of the isoleucine catabolism pathway (ethylhydracrylic acid, tiglylglycine and 2-methyl-3hydroxybutyric acid). Results of this targeted approach show a definite perturbance, similar to a very minor inherited metabolic disorder, occurs within the isoleucine catabolism pathway in response to an acute alcohol dose. As to our knowledge, no information pertaining to the influences of acute alcohol abuse (or even chronic alcohol abuse) within the branched-chain amino acid pathway exists within the current literature, as of date. As such, the experimental observations presented and evaluated within this investigation provide a novel and more in-depth insight into the ethanol-induced perturbances within human metabolism.Thesis (M.Sc. (Biochemistry))--North-West University, Potchefstroom Campus, 2010.
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Olin, Nathalie, and Renée Roos. "När magen krympte : patientupplevelser före och efter överviktskirurgi." Thesis, Högskolan Kristianstad, Sektionen för hälsa och samhälle, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-12812.
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Bakgrund: Överviktsoperationer ökar i snabb takt runt om i världen i samband med en eskalerande fetmaepidemi. En överviktsoperation innebär stora förändringar i livet och ställer krav på att sjukvårdspersonal är kunniga om dessa förändringar ur patientens perspektiv. Syfte: Syftet med litteraturstudien var att belysa patienters upplevelser före och efter överviktskirurgi. Metod: 13 vetenskapliga artiklar granskades och analyserades. Sammanställningen resulterade i ett tema och fem presenterade underkategorier. Resultat: Överviktskirurgi blev en sista chans till ett bättre liv för patienterna. De hade förväntningar på ett förändrat liv, som i många fall till stor besvikelse inte blev bättre. Patienterna upplevde att den mentala hälsan blev åsidosatt vid överviktskirurgi, varav de önskade att vårdpersonalen la mer fokus på just detta. Slutsats: Då överviktskirurgi är en livsomvälvande process är det viktigt att sjuksköterskan har förståelse för patientens hela upplevelse, även den känslomässiga.Background: The number of bariatric surgeries performed globally is increasing in relation to an escalating obesity epidemic. Bariatric surgery leads to life-changing processes and put demands on health care staff to have knowledge about these changes from the patients’ perspective. Purpose: The purpose of the literature review was to illuminate patients’ experiences before and after bariatric surgery. Method: Thirteen scientific articles were reviewed and analysed. The combination resulted in a theme and five presented subcategories. Results: Bariatric surgery became the last chance to a better life for the patients. They had expectations of a changed life, which in many cases to great disappointment didn’t became better. The patients experienced that the mental health was disacknowledged while going through bariatric surgery and was something they wished that the health care staff had focused more on. Conclusion: Bariatric surgery is a life-changing process, why it’s important for the nurse to understand the experiences of the patient, even the emotional experience.
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Samuelsson, Niclas. "The Magnon-Phonon coupling from a microscopic perspective." Thesis, Uppsala universitet, Materialteori, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385931.
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In this project a microscopic description of the magnon-phonon coupling is rederived. This theory is then used to simulate the thermalization process between the spin and lattice system in NiO. It is argued that the Kusuya-LeCraw process (1 mg + 1 ph into 1 mg) cannot be the reason that the phononic and magnonic systems reach a thermal equilibrium. As a consequence a quasi-stable equilibrium, different from the thermal solution, is reached in less than 1 ps for NiO. Finally, the effect of applying an external magnetic field to the system, breaking the degeneracy between the magnons of opposite polarization, is studied.
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Almeida, Isabel Maria Castelhano Claro de. "Técnicas realistas nas obras autobiográficas de Sindiwe Magona." Master's thesis, Universidade de Aveiro, 2004. http://hdl.handle.net/10773/2755.
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Nos últimos anos temos assistido ao reavivar do realismo, no entanto,
este tem sido hifenizado com tantos outros termos que assumiu um
significado ambíguo. Tentarei, ao longo deste trabalho, classificar o
termo realismo e mostrar as suas técnicas adaptadas à autobiografia.
Nas obras autobiográficas de Sindiwe Magona To My Children’s Children
e Forced to Grow obtemos um relato verídico do que foi, para uma
mulher negra, crescer e viver na África do Sul. Estes trabalhos
autobiográficos irão ser analisados à luz da perspectiva realista tendo em
conta as características próprias da autobiografia.
ABSTRACT: In the last few years Realism has been revived assuming almost an
‘elastic’ meaning and has been hyphenated with many words. I intend to
clarify the meaning of Realism and how its techniques will appear in
autobiographies. In the autobiographical works by Sindiwe Magona To
My Children’s Children and Forced to Grow we will get a faithful account
of what it was for a black woman to grow up and live in South Africa.
These autobiographical works will be analysed through a Realist
perspective albeit with attention to the characteristics of autobiographical
writing as well.
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Toman, Jiří. "Programování dvouosého pohonu s EC motory typu Maxon." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228121.
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This work describes direction of the two-axle drive with EC motors type MAXON by means of control unit EPOS. Except own direction of EC motors it contains various types progress for proposal parameters of the continuous and discrete regulator with consequence verification and character comparison by means of programming surroundings MATLAB. After the successful simulation verification is introduced most suitable regulator for positional direction of the two-axle drive into the real control units EPOS which they are connected to EC motors MAXON with making sign EC- max 22. Further is realized communication setting among control unit type EPOS P and her subjection unit EPOS. Unit EPOS P is further connected with steering computer by means of serial bus RS 232. Other part these work is program for direction of the two-axle drive copying the inscription MAXON with use linear and circular interpolation. To creation of the program source code is used standard programming language ST. This program is realized in programming surroundings EPOS STUDIO which is added by the producer to control units EPOS.
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Litvack, Leon Barry. "John Mason Neale and the quest for sobornost." Thesis, University of Edinburgh, 1990. http://hdl.handle.net/1842/24073.
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Javaid, Usman. "Modeling of a Tunable Film Bulk Acoustic Resonator and Bandpass Filter Design by using Ferroelectric Film." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-9432.
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Filters having smallest size, high power handling capability, high Q factor, operating frequency up to several gigahertz’s (GHz) and low cost are the demand of the market to use in front end wireless/radio communication systems. In this regard several filter technologies have been introduced and utilized commercially. The increasing demand of such type of filters has opened a new challenge for filter designers. The purpose of this thesis is to design of a Tunable Bandpass Filter based on Barium Strontium Titanate (BSTO) Ferroelectric Film. A single Film bulk acoustic resonator (FBAR) is measured. MASON and Butterworth Van-Dyke (BVD) model are studied and implemented to reproduce the measurements. Simulations are performed by using the Advance Design System (ADS) by Agilent technologies. Simulations and measured data are used to exactly extract the physical and electrical parameters of a single FBAR. FBAR filter topologies are being studied and implemented. Ladder filter topology is selected to design the bandpass filter. The extracted physical and electrical parameters are used to investigate the performance of the filter. The area and the top electrode thickness of the series and shunt resonators are optimized to achieve the bandpass response with maximum out of band rejection, minimum insertion loss and sharper roll off near the pass band. A 3rd order T-type bandpass filter for 5GHz applications is designed. The insertion loss of -2.925 dB is achieved. The filter exhibits the 3dB bandwidth of 176 MHz and out of band rejection of -10 dB. DC bias of 0-25 V is used to analyze the tuning behavior of the filter. The electromagnetic co-simulation is also done in momentum to analyze the parasitic effects between the resonators. The results show the good agreement between the schematic and momentum simulation. Layout and masks are also designed on a 10*10 mm wafer that will be used later to fabricate the filter and further investigations.
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Tatar, Matyas. "Nachweis der Proliferation des Magen- und Darmepithels von neugeborenen und adulten Pferden mittels Ki-67." Wettenberg : VVB Laufersweiler, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974923443.
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Brauch, Katrin. "Male and female reproductive strategies in relation to paternity outcome in Barbary macaques (Macaca sylvanus)." Göttingen Cuvillier, 2007.
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Jensen, Morten R. F. "Far infrared magneto-spectroscopy of bulk and surface magnetic excitations in FeFâ†2." Thesis, University of Essex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361040.
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Mason, Anthony Stuart. "An implementation of web-based groupware application for students at UoL /." Leeds, 2001. http://www.leeds.ac.uk/library/counter2/compstmsc/20002001/mason-a%5Fpdf.zip.
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Mason, Sally Ann. "Web-based virtual reality for surgical training /." Leeds, 2001. http://www.leeds.ac.uk/library/counter2/compstmsc/20002001/mason-s.doc.
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Costa, Antonio Carlos Silva da. "Estudo das propriedades estruturais e magn?ticas de nanoferritas de magn?sio dopadas com n?quel e cobre." PROGRAMA DE P?S-GRADUA??O EM CI?NCIA E ENGENHARIA DE MATERIAIS, 2015. https://repositorio.ufrn.br/jspui/handle/123456789/21540.
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Ferritas de estrutura espin?lio (MFe2O4; M= metal alcalino terroso ou metal de transi??o) desempenham um papel importante na ci?ncia fundamental e na tecnologia moderna. A ferrita de magn?sio (MgFe2O4) e seus compostos dopados tem recebido especial aten??o devido a sua vasta ?rea de atua??o, que inclui aplica??es em m?dia de alta grava??o, cat?lise heterog?nea, adsor??o, sensores e tecnologias magn?ticas, de um modo geral. Suas propriedades estruturais, el?tricas e magn?ticas dependem da composi??o qu?mica, estrutura, tamanho de part?culas, al?m da substitui??o de c?tions nos s?tios A e/ou B que s?o diretamente influenciados pelo m?todo de s?ntese, as condi??es empregadas no processamento desses materiais (temperatura, taxa de aquecimento e tempo). Neste trabalho, ferritas do tipo Mg1-xBxFe2O4 (B= Ni; Cu; x= 0; 0,25; 0,50; 0,75 e 1) foram preparadas pelo m?todo de combust?o assistido por micro-ondas com a finalidade de avaliar tanto o efeito da substitui??o parcial do magn?sio por n?quel e cobre quanto o tratamento t?rmico sobre as propriedades magn?ticas. Os p?s precursores foram tratados termicamente a 600?C, 800?C e 1000?C/2h e caracterizados por An?lise Termogravim?trica (ATG), Difra??o de Raios X (DRX) em conjunto com o Refinamento pelo m?todo Rietveld, Microscopia eletr?nica de varredura (MEV) e Medidas de histerese magn?ticas realizadas ? temperatura ambiente. De acordo com as curvas termogravim?tricas dos p?s precursores, um comportamento semelhante foi observado para ambos os sistemas de amostras, onde o processo de perda total de massa aconteceu basicamente em duas etapas e na faixa de temperatura entre 30 e 500?C para o sistema Mg1-xNixFe2O4 e entre 30 e 400?C para o sistema Mg1-xCuxFe2O4. Os difratogramas de raios X revelaram a forma??o da fase espin?lio MgFe2O4 (ICSD 76176) de estrutura c?bica, e de fases secund?rias como Fe2O3 (ICSD 88418), NiO (ICSD 9866) e CuO (ICSD 87125) para os sistemas estudados. Em rela??o ?s curvas de histerese, verificou-se uma depend?ncia da magnetiza??o em fun??o do teor de dopante e da temperatura de tratamento t?rmico adotada.
The magnesium ferrite (MgFe2O4) and their doped compounds has received special attention due to its wide area of use, including applications in high recording media, heterogeneous catalysis, adsorption, sensors and magnetic technologies. Its structural, electrical and magnetic properties depend on the chemical composition, structure, particle size, and the replacement of cations in the sites A and/or B, which are directly influenced by the synthesis method, the conditions employed in processing these materials. In this work, ferrites of the type Mg1-xBxFe2O4 (B = Ni, Cu; x = 0, 0.25, 0.50, 0.75 and 1) were prepared by combustion method assisted by microwave in order to evaluate both the effect of partial substitution of Mg2+ for Ni2+ and/or Cu2+ as thermal treatment on the magnetic properties. Precursor powders were treated at the temperatures of 600 ?C, 800 ?C and 1000 ?C with 2h level and characterized by Thermogravimetric Analysis (TGA), X-Ray Diffraction (XRD) and refinement by the Rietveld method, Scanning Electron Microscopy (SEM) and magnetic hysteresis measurements at room temperature. According to the TG curves of the precursor powders, a similar behavior was observed for both systems where the total mass loss process occurred in two stages and in the temperature range between 30 and 500 ?C for Mg1-xNixFe2O4 system (x = 0, 0.25, 0.50 and 0.75) and between 30 and 450 ?C for Mg1-xCuxFe2O4 system (x = 0, 0.25, 0.50 and 0.75). The X-ray diffraction revealed the formation of the spinel phase MgFe2O4 (ICSD 76176) of cubic symmetry, and secondary phases such as ?-Fe2O3 (ICSD 88418), NiO (ICSD 9866) and CuO (ICSD 87125), for the studied systems. Regarding the hysteresis curves, there was a dependence of the magnetization as a function of the dopant content and the heat treatment temperature adopted. For Mg0,25Ni0,75Fe2O4 Mg0,75Cu0,25Fe2O4 and samples treated at 1000 ?C showed the highest saturation magnetization values of 41.9 emu/g and 35.76 emu/g, respectively.
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Schedler, Roland. "Untersuchung von magnetischen Anregungen in CeCu2 mit inelastischer Neutronenstreuung." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1192197040824-69568.
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Inhalt der vorliegenden Dissertation ist die Untersuchung der elektronischen und magnetischen Eigenschaften der Schwerfermionensubstanz CeCu2. Dafür wurden makroskopische Messungen der Magnetisierung, der Suszeptibilität sowie der spezifischen Wärme aus der Literatur miteinander verglichen und eigenen Neutronenstreuexperimenten gegenübergestellt. Ein Teil der Arbeit widmet sich der Entwicklung des neuen Dreiachsenspektrometers PANDA am FRM2 München. Für dieses wurden umfangreiche Simulationen durchgeführt, um zukünftige Leistungsdaten zu spezifizieren. Mit dem Ray - Trace - Simulationspaket McStas wurde das Neutronenstreugerät modelliert und das Zusammenspiel der neutronenoptischen Bauelemente optimiert. Der zweite Teil der Arbeit beschäftigt sich mit Messungen und Rechnungen zum magnetischen Phasendiagramm von CeCu2. Dazu wurden eigene Messungen der Magnetisierung (VSM) und elastische Neutronenstreuexperimente (D23, ILL Grenoble) einer McPhase - Rechnung gegenübergestellt. Der nächste Abschnitt der Arbeit befasst sich mit elastischen und inelastischen Neutronenstreuexperimenten (IN12 & IN20, ILL Grenoble) an CeCu2 Einkristallen. Diese Messungen untersuchen die statischen (Struktur, Phasendiagramm) sowie dynamischen Eigenschaften (Anregungen) in dieser Substanz. Insbesondere beschäftigen sich diese Messungen mit den Dispersionsrelationen der Magnonen in hohen magnetischen Feldern bis zu mu0H = 12 Tesla. Für diese Experimente wurde eine neue Probenbox für den Einsatz in Hochfeldmagneten entwickelt, welche die Probe fixiert und in einer Schutzgasatmosphäre einschließt. In den Messungen wurde eine unerwartete, dispersionslose Anregung gefunden, welche mit dem derzeitigen Spinwellenmodell unverträglich ist. Bei Erhöhung des Magnetfeldes steigt die Anregungsenergie doppelt so schnell, wie von gewöhnlichen Magnonen erwartet wird. Zur Erklärung wird ein neutroneninduzierter pi/2 - Spinflop - Prozess vorgeschlagen. In einer anderen Messung wurde mit polarisierten Neutronen nach dem bisher indirekt nachgewiesenen, ersten angeregten Kristallfeldniveau bei 9 Millielektronenvolt gesucht. Bei wachsenden Temperaturen konnte kaum magnetische Streuintensität unterhalb 10 Millielektronenvolt gefunden werden. Jedoch wurde eine stark verbreiterte Intensität von 8 bis 15 Millielektronenvolt gemessen. Diese Energie korreliert mit dem Übergang zwischen den angeregten Kristallfeldniveaus. Als Ursache für die Verbreiterung wird eine Kristallfeld - Phonon - Wechselwirkung angegeben. Aus dem Vergleich der in verschiedenen Richtungen gemessenen magnetischen Streuintensitäten des 23 Millielectronvolt Kristallfeldüberganges können dessen Übergangsmatrixelemente abgeschätzt werden. Diese wurden den errechneten Werten der veröffentlichten Kristallfeldparametersätze gegenübergestellt. Es zeigte sich, dass die alten Parametersätze die neuen Messdaten nicht beschreiben können. Deshalb wurde ein neuer Satz aufgestellt, welcher erstmals sowohl die makroskopischen Messungen als auch die Neutronenstreuexperimente erklärtIn this thesis, the electronic and magnetic properties of the heavy-fermion system CeCu2 are investigated. For that purpose, measurements of susceptibility, magnetisation and specific heat from literature are compared with each other and are compared with neutron-scattering experiments performed for the present work. One part of the thesis is addressed to the design of the new triple-axis spectrometer PANDA, which is situated at the research reactor FRM2 in Munich. Extensive simulations were performed with the ray - tracing simulation package McStas in order to model this neutron scattering instrument and to optimise its neutron optic elements. The second part of this work deals with measurements and calculations of the magnetic phase diagram of CeCu2. The experiments include the macroscopic magnetisation (VSM) and elastic neutron-scattering measurements (D23, ILL Grenoble). The McPhase calculations are in a good agreement with the experiments. The next part presents elastic and inelastic neutron-scattering experiments (IN12 & IN20, ILL Grenoble) at CeCu2 single crystals. These measurements investigate the static (phase diagram) as well as dynamic properties (excitations) of this compound. Especially, the experiments are concentrated on the investigation of the dispersion relation of magnons in magnetic fields up to mu0H = 12 tesla. For these measurements, a new sample holder suitable for use in high magnetic fields was designed, which fixes the sample in a hermetically sealed containment. In the experiments an unexpected dispersionless excitation was observed, which does not fit the standard magnon model. With increasing magnetic field the energy of this excitation increases with a slope of twice the value expected for regular magnons. A neutron - induced pi/2 spin - flop process is proposed to explain this excitation. In another measurement with polarised neutrons the first excited crystal - field level at 9 millielectronvolt, which has not been directly detected up to now, was investigated. With increasing temperature, only small magnetic scattering intensity occurs below 10 millielectronvolt. >From 8 to 15 millielectronvolt a broad signal was detected, which corresponds to the energy of the transition between the two excited levels. Due to a strong crystal field - phonon interaction, the width is unusually broadened. The transition matrix elements can be estimated from the comparison of the components of the magnetic scattering intensities of the 23 millielectronvolt crystal - field transition. These values were compared with the calculated values from published crystal-field parameter sets. The old sets cannot explain the new measurements. A new set was derived which accounts for the macroscopic measurements and for the neutron - scattering data, too
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Rebou?as, Gustavo de Oliveira Gurgel. "Efeitos de interface em bicamadas magn?ticas." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16623.
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We study magnetic interface roughness in F/AF bilayers. Two kinds of roughness were considered. The first one consists of isolated defects that divide the substrate in two regions, each one with an AF sub-lattice. The interface exchange coupling is considered uniform and presents a sudden change in the defects line, favoring Neel wall nucleation. Our results show the interface field dependence of the threshold thickness for the reorientation of the magnetization in the ferromagnetic film. Angular profiles show the relaxation of the magnetization, from Neel wall, at the interface, to reoriented state, at the surface. External magnetic field, perpendicular to the easy axis of the substrate, favors the reoriented state. Depending, of the external magnetic field intensity, parallel to the easy axis of the AF, the magnetization profile at surface can be parallel or perpendicular to the field direction. The second one treats of distributed deffects, periodically. The shape hysteresis curves, exchange bias and coercivity were characterized by interface field intensity and roughness pattern. Our results show that dipolar effects decrease the exchange bias and coercivity
Estudamos os efeitos de rugosidade magn?tica em interfaces F/AF. Dois tipos de rugosidade foram considerados. O primeiro consiste de defeitos isolados que dividem o substrato em duas regi?es, cada qual com uma sub-rede do antiferromagneto. O acoplamento de troca, atrav?s da interface, ? considerado uniforme, o campo efetivo de interface apresenta uma mudan?a s?bita de sentido na linha de defeitos, favorecendo a nuclea??o de uma parede de N?el. Nossos resultados indicam que h? um limiar de espessura, dependente da intensidade do campo de interface, para o qual a magnetiza??o do filme ferromagn?tico se reorienta na dire??o perpendicular ao eixo f?cil do AF. Perfis angulares mostram como a magnetiza??o relaxa, espacialmente, do estado de parede de dom?nio de N?el, na interface, para o estado de reorientado, na superf?cie. A presen?a de campo aplicado perpendicular ao eixo de anisotropia do AF, favorece o estado reorientado. Para campo aplicado ao longo do eixo de anisotropia do AF, o perfil de magnetiza??o pode evoluir de uma parede de N?el, na interface, para o estado uniforme perpendicular ou paralelo ao campo aplicado, na superf?cie. O segundo trata defeitos distribu?dos, periodicamente, na forma de ilhas quadradas. Fizemos uma caracteriza??o das curvas de histerese, do deslocamento da histerese e da coercividade como fun??o da intensidade do campo de troca e do padr?o de rugosidade da interface. Nossos resultados indicam que efeitos dipolares, nesse padr?o de rugosidade na interface, diminuem o deslocamento da histerese e coercividade
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Monteiro, M?rio Antonio Alves. "Propriedades f?sicas de bicamadas magn?ticas." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/16656.
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Previous issue date: 2007-03-21Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico
The magnetic order of bylayers composed by a ferromagnetic film (F) coupled with an antiferromagnetic film (AF) is studied. Piles of coupled monolayers describe the films and the interfilm coupling is described by an exchange interaction between the magnetic moments at the interface. The F has a cubic anisotropy while the AF has a uniaxial anisotropy. We analyze the effects of an external do magnetic field applied parallel to the interface. We consider the intralayer coupling is strong enough to keep parallel all moments of the monolayer an then they are described by one vector proportional to the magnetization of the layer. The interlayer coupling is represented by an exchange interaction between these vectors. The magnetic energy of the system is the sum of the exchange. Anisotropy and Zeeman energies and the equilibrium configuration is one that gives the absolute minimum of the total energy. The magnetization of the system is calculated and the influence of the external do field combined with the interfilm coupling and the unidirectional anisotropy is studied. Special attention is given to the region near of the transition fields. The torque equation is used to study dynamical behavior of these systems. We consider small oscillations around the equilibrium position and we negleet nonlinear terms to obtain the natural frequencies of the system. The dependence of the frequencies with the external do field and their behavior in the phase transition region is analized
O ordenamento de bicamadas magn?ticas compostas por um filme ferromagn?tico (F) fino acoplado com um filme antiferromagn?tico (AF) ? estudado, considerando que os filmes podem ser descritos por uma pilha de camadas monoat?micas (infinitas) acopladas. O acoplamento entre os filmes ? representado pela intera??o entre os spins das monocamadas da interface. Consideramos que o filme F tem uma anitropia c?bica e os momentos do filme AF sentem a presen?a de uma anisotropia uniaxial. Adicionalmente, os spins que comp?em as camadas da interface sentem a presen?a de uma anisotropia unidirecional. Os efeitos de um capo magn?tico est?tico aplicado paralelo ao plano da interface s?o analisados. Consideramos que a intera??o de troca entre os momentos magn?ticos de uma mesma monocamada ? suficientemente forte para mant?-los alinhados em uma mesma dire??o. Cada camada monoat?mica ? representada por um ?nico vetor (vetor magnetiza??o) proporcional ao momento magn?tico total da monocamada, e a intera??o entre estes vetores ? proporcional a intera??o efetiva entre as monocamadas. A energia magn?tica do sistema ? escrita como a soma das energias de troca, anisotropia e Zeeman, e as configura??es de equil?brio s?o obtidas atrav?s da minimiza??o da energia. A magnetiza??o do sistema ? calculada em fun??o do campo magn?tico dc aplicado e o efeito do meesmo, combinando com a intera??o interfilmes e anisotropia unidirecional, ? investrigado. A aten??o especial ? dada ?s regi?es de campo pr?ximas as transi??es de fase. Usamos a equa??o do torque para estudae o comportamento din?mico desses sistemas. Considerando que os vetores magnetiza??o oscilam em torno da posi??o de equil?brio, com amplitudes suficientemente pequenas para que os efeitos n?o lineares possam ser desprezados, calculamos as "freq??ncias naturais" do sistema dando especial aten??o as duas de menos valor. A depend?ncia das freq??ncias com a intensidade do campo ? determinada e o comportamento nas regi?es de transi??o de fase ? analisado
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Vondran, Sarah, Monica Venner, and Ingrid Vervuert. "Effects of two alfalfa preparations with different particle sizes on the gastric mucosa in weanlings." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-205250.
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Background: Feeding alfalfa hay is often recommended for its buffering components, like protein and calcium, to prevent lesions of the gastric mucosa in horses. Until now, there has been no information regarding the influence of alfalfa particle size on the gastric mucosa. The aim of this study was to investigate the effects of feeding two alfalfa preparations with different particle sizes (alfalfa chaff vs alfalfa pellets) in comparison with grass hay on the gastric mucosa in weanling horses. We hypothesized that feeding a high proportion of fine alfalfa particles
would negatively impact gastric mucosa and that feeding long alfalfa chaff would improve gastric mucosal health in weanlings. Results: Before weaning, the prevalence of gastric mucosa lesions (one or more lesions considering all locations in the stomach) was 84.3 %; at 14 days after weaning, it was almost 100 %. Before and after weaning, most of the lesions were found at the greater curvature of the squamous mucosa and at the lesser curvature. After weaning, gastric
mucosal lesions at the pylorus were significantly more severe in the group fed alfalfa chaff (p = 0.002). In the other regions, no differences related to the feeding regimes were observed. Conclusions: Feeding alfalfa failed to improve gastric mucosal lesion scores in weanlings. Furthermore, foals fed alfalfa chaff had higher lesion scores at the pylorus. Alfalfa leaves contain a superior protein source and high amounts of calcium and magnesium, providing extra nutritional advantages in growing horses. At this time, either traditional grass hay rations or grass hay with alfalfa pellets can be recommended.
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Bellamy, Louis. "George Mason: Slave Owning Virginia Planter as Slavery Opponent?" TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/521.
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The present work investigates the often cited, but poorly supported, notion that Founding Father George Mason was a wealthy, slave-owning Virginian who vehemently opposed slavery. Utilizing Mason's state papers, letters, and other documents, as well as contemporaries' accounts of his speeches, this work will analyze those records' contextual construction, and it will deconstruct both Mason's written and spoken words and his actions and inactions relative to slavery. The goal of this effort is to determine whether Mason, who ostensibly played such an instrumental role in the development of the "rights" of Americans, and who remained a slaveholder—thereby trampling the rights of others—was truly opposed to slavery. Included in this work are chapters relating to the development of chattel slavery in the Tidewater, Virginia region from its inception and to the Mason family's mounting economic and political prominence, particularly the role of slaves in their attainment of that prominence. Two chapters analyze Mason's state papers, his writings on public matters, his public speeches, and other related material with a view towards determining their nexus with slavery and his role in their development. The final chapter focuses narrowly on Mason's personal relationship with slavery, and it includes both Mason's documents and his personal actions, with his documented actions concerning his own slaves meriting special attention. A portion of the chapter compares and contrasts Mason, Washington, and Jefferson on the matter of slave manumission. The argument is made that despite his consequential role in the development of some of America's revered founding documents, relative to his more prominent Virginia political peers, George Mason has garnered on rudimentary evaluation from the collective pens of more than two centuries of historians. Not only has Mason largely missed the genuine accolades befitting a Founding Father, some historians have simply ignored the contradictions of Mason's slave owning and his presumed abhorrence of slavery. Others have offered little more than a passing mention of Mason's slaveryrelated conundrum. Some have noted his slave-holding status, but then mistakenly considered anti-slavery and anti-slave trade as fungible positions and then proceeded to extol Mason's abhorrence of, and fight against, chattel slavery. Still others have claimed the institution was simply an unwelcome legacy entailed upon him. Mason, as an historical subject, stands under-reported, under-analyzed, often embellished, and generally carelessly considered. In spite of the effusive hyperbole of some Mason historians, this thesis argues Mason's apparently strong condemnations of the slave trade and of slavery were themselves strongly nuanced, and his actions (and, perhaps more importantly, his inactions) toward his own slaves run counter to the conclusive judgment of Mason as a slavery opponent. Nevertheless, Mason's statements and political actions—however tepid, and however nuanced—represent important work against the pernicious problem of slavery by a thoughtful, respected, and politically well-positioned Founding Father. This work will demonstrate Mason was likely neither the prescient anti-slavery advocate, as he is generally regarded among historians, nor fully a self-serving demagogue. Indeed, the definitive judgment of George Mason as a slave owning, Virginia planter, and Founding Father who served as a slavery opponent remains elusive.
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Ritzmann, Ulrike [Verfasser]. "Modeling spincaloric Transport : Magnon accumulation and propagation / Ulrike Ritzmann." Konstanz : Bibliothek der Universität Konstanz, 2016. http://d-nb.info/1112944931/34.
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Martínez, Cuéllar José Luis. "Three magnon excitations in alternating quantum spin/bond chains." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/mq23412.pdf.
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Bourg, Manon [Verfasser]. "Virusökologische Untersuchungen zur Bornaschen Krankheit in Bayern / Manon Bourg." Gießen : Universitätsbibliothek, 2018. http://d-nb.info/1163945331/34.
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