Materials Literature
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Amélioration de la puissance des transformateurs piézoélectriques par gestion de l'échauffement L’objectif de cette étude est d’améliorer les performances des transformateurs piézoélectriques en terme de courant de sortie et de puissance pour des applications d’alimentation DC/DC, grâce à la gestion de l’échauffement.…
Made available in DSpace on 2017-07-10T18:08:02Z (GMT). No. of bitstreams: 1 Vinicius Muller.pdf: 5054743 bytes, checksum: 4684dd9325f819006bfd84424d666674 (MD5) Previous issue date: 2014-07-04
Grande parte dos componentes mecânicos e estruturas são solicitados por carregamentos que variam com o tempo e frequentemente falham por fadiga. Neste sentido, é indubitável que o modo de falha por fadiga seja considerado no projeto mecânico de componentes, equipamentos e estruturas sujeitas a carregamentos cíclicos.…
Barium stannate (BaSnO3) and strontium stannate (SrSnO3) are perovskites type oxyde that have cubic (Pm3m) and orthorhombic (Pbnm) structures, respectively. These materials have received much attention due to their interesting physical and chemical characteristics, leading to a variety of technological applications. I…
The role of nanoinclusions in the formation of the microstructure of weld metal of high-strength low-alloy steel with bainitic ferrite structure is showed. The features of the influence of nanoinclusions chemical composition on formation of the ferritic phase are analyzed.
Safety is a key concern for the North American railroad industry, particularly for their employees. However, in one particular area there is an identified urgent need for a novel solution that helps protect them better than the current approach: track worker safety. Railroad employees and contractors are required to w…
Au delà du simple dépôt d’énergie obtenu par des lasers à impulsions longues, le laser femtoseconde conduit à la création de forces agissant sur la matière qui impriment une nanostructuration en volume dans la silice classée dans les dommages de type II. Si on s’avérait capable de maîtriser ces forces, on pourrait alo…
Les nanoparticules ont soit une origine naturelle soit une origine anthropique. De par l’évolution technologique, l’homme produit des quantités croissantes de nanoparticules susceptibles de se retrouver dans l’environnement. Afin de prévenir les risques inhérents à ces rejets, pour la santé humaine ou l’environnement,…
This study applies the nonlinear finite element analysis software LS-DYNA to conduct a numerical simulation of damage mode of reinforced concrete slab under complex boundary condition subjected to air blast load. The factors affecting damage model of reinforced concrete slab, standoff distance and explosives location,…
scholarly work of the highest quality from all subfields of political science.PSRM seeks research that applies rigorous methods to empirical or theoretical problems and promotes a rigorous scientific approach to the study of politics.Work at the intersection of political science and related disciplines such as economi…
The ligands of nickel catalysts are optimized to establish a living system of “Negishi-type catalyst-transfer polycondensation” (NCTP). Eisuke Goto, Saki Nakamura, Susumu Kawauchi, Hideharu Mori, Mitsuru Ueda, and Tomoya Higashihara report on page 2287 (DOI: 10.1002/pola.27243) on the use of a zincate complex as a syn…
Dans cette these, les caracteristiques de l’adsorption de dithiols sur des metaux sont etudiees en utilisant principalement l’XPS a haute resolution sur synchrotron, TOF DRS at LEED. L’objectif est de caracterise les couches auto-assemblees de dithiols formees par evaporation sous vide, comprendre la transition de dit…
Připrava a charakterizace fosfazenových derivatů, hexachloro-cyklo-triforfazenu. Jako funkcni skupiny byly využity PhO- a CF3CH2O-. Derivaty byly charakterizovany pomoci 31PNMR, IR. Derivaty byly použity jako aditiva do komercnich polymerů, vlakněny pomoci technologie Nanospider. U netkaných textilii byla ověřena přit…
Active turbulence in dense active systems is characterized by high vorticity on a length scale that is large compared to that of individual entities. We describe the properties of active turbulence as momentum propagation is screened by frictional damping. As friction is increased, the spacing between the walls in the…
Resonator absorbers are widely used for tuning the acoustic characteristics of spaces. This thesis extends the research with a resonator prototype with adjustable acoustic characteristics (absorption and diffusion) by using two movable perforated plates with 4 sections, all containing different depths. Presented tools…
Luminescent lanthanides emitting in the near-infrared (NIR) region of the electromagnetic spectrum have interesting properties, which continue to attract an escalating attention for their use in bioanalytical and optical imaging applications. For lanthanide sensitization, it is favorable to have a molecular entity wit…
L’optimisation des microstructures de surface est un facteur primordial pour améliorer les propriétés et la durée de vie des matériaux. Pour le traitement des aciers inoxydables, la nitruration est un procédé adéquat permettant l’augmentation de la dureté et de la résistance à l’usure par formation d’une austénite «ex…
A doença gordurosa não alcoólica do fígado (DGNA) é a doença hepática mais\ncomum no mundo ocidental. Trata-se de uma doença espectral, que pode evoluir de uma esteatose\nhepática simples para esteato-hepatite não alcoólica, culminando em cirrose. Um dos fatores que\nparece ser responsável pela progressão dessa doença…
Made available in DSpace on 2017-07-10T18:08:02Z (GMT). No. of bitstreams: 1 Vinicius Muller.pdf: 5054743 bytes, checksum: 4684dd9325f819006bfd84424d666674 (MD5) Previous issue date: 2014-07-04
Barium stannate (BaSnO3) and strontium stannate (SrSnO3) are perovskites type oxyde that have cubic (Pm3m) and orthorhombic (Pbnm) structures, respectively. These materials have received much attention due to their interesting physical and chemical characteristics, leading to a variety of technological applications. I…