Materials Literature
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The goal of this project was to study the economic feasibility of using water lenses to provide low-cost Concentrator PhotoVoltaic (CPV) arrays as an alternative to using conventional optics. We employed numerical analysis of the lens using Finite Element Analysis and ray tracing to conceive a light focusing apparatus…
O presente trabalho abordou um método de caracterização geométrica de materiais porosos a fim de se obter propriedades difusivas funcionalmente gradativas. O objetivo do trabalho é a obtenção de curvas de condutividade resultantes de distribuições de poros segundo uma probabilidade exponencial. Para tal, o material ba…
As ammonia addition is the most widespread latex stabilization method, we investigated the impact of ammonia-stabilization on biochemical and physicochemical indicators of latex in liquid and dry state (thin film) at different storage times (0 to 41 days). For liquid state, measured indicators included surface tension…
Bio-oil upgrading via hydrodeoxygenation (HDO) was investigated using anisole, a model compound, in a novel Externally Agitated (EA) reactor which is expected to enhance gas-liquid-solid mixing. Operating conditions were established based on anisole HDO with 10 wt.% Ni on silica, γ-alumina, and δ-alumina while varying…
Durante los ultimos diez anos, el codigo de seguridad AINA ha sido desarrollado con el objetivo de evaluar la evolucion del plasma y los esfuerzos padecidos por los componentes internos de la vasija en distintos reactores de tipo Tokamak. El presente documento describe el nuevo codigo AINA 4 adaptado a los cuatro dise…
Objective: to carry out the comparative assessment of the intensity and duration of the antibacterial effect of monofilament polypropylene and polyfilament threads made of polyglycolic acid modified with antibiotic-containing coating. Material and methods. The antibacterial activity of thread samples containing an ant…
This dissertation deals with the modeling of inter-laminar contacts in the cores of electrical machines. A series of punching and pressing processes forms random burrs at the edges of electrical sheets. These burrs form random inter-laminar galvanic contacts when pressed. Several numerical formulations based on finite…
In this paper we showed that tot’hema eosin sensitized gelatin (TESG) film can be used for adaptive microlenses fabriacation. The mechanical properties of a pure gelatin film were improved by adding tot’hema solution. We found that the elasticity of TESG film depend on the tot’hema concentration. By stretching the fil…
In this paper, the application of TiO2 nanoparticles in hardfacing of hard, chemical resistant, cobaltbased alloys, is studied. The hardfacing of structural steel specimens are carried out with manual shielded metal arc welding process. The consumables were nickel chromium alloy as a buffer layer and the cobalt alloy…
Le CECAM m’a mandaté dans le cadre du travail de Bachelor, car il souhaitait organiser, structurer, valoriser son fonds d’archives et améliorer sa gestion documentaire. L’approche de son 50ème anniversaire a déclenché de nombreuses réflexions en ce sens. Le présent travail s’est décliné en trois axes. Le premier consi…
La qualite ecologique des eaux des localites soumises a l’exploitation artisanale et clandestine de l’or au niveau du Bandama-Blanc et de ses affluents a ete etudiee entre le 01 et le 15 Avril 2015. Le prelevement du phytoplancton a ete realise a l’aide de la bouteille hydrologique et du filet a plancton, tandis que l…
The service life and mechanical properties of bituminous mixtures are greatly affected by distress problems such as fracture, thermal cracking, and fatigue cracking of the asphalt layers. The fracture and fatigue crack growth (FCG) behavior of bituminous mixtures are difficult to quantify due to material-, test-, and…
We have investigated the superspin dynamics of 5 nm and 10 nm mixed state Mn3O4 nanoparticles utilizing ac-susceptibility and electron paramagnetic resonance measurements. The out of phase component of the ac-susceptibility measurements show a magnetic anomaly below (T < TN) the paramagnetic to ferrimagnetic transitio…
La conjugación bacteriana, a pesar de la gran cantidad de información disponible sobre sus aspectos moleculares, todavía no dispone de una forma sistémica estructurada que esté completamente establecida y que además pueda permitir una aproximación en cierto modo estándar a las tareas de construcción de modelos y su si…
Abstract:\nTo date, cranberry terminal bud cold hardiness has been assessed by controlled freezing tests where levels of damage are evaluated from tissue samples exposed to a range of predetermined sub-freezing temperatures. As in many woody plant buds, freezing stress damage in cranberry is variable across different…
Network-on-Chips (NoCs) have emerged as a communication infrastructure for the multi-core System-on-Chips (SoCs). Despite its advantages, due to the multi-hop communication over the metal interconnects, traditional Mesh based NoC architectures are not scalable in terms of performance and energy consumption. Folded arc…
将Drucker-Prager/Cap塑性模型引入到高硬度W-Cu20粉末轧制有限元分析中,利用巴西圆盘试验、单轴压缩试验以及模压试验得到Drucker-Prager/Cap塑性模型参数,借助商业有限元软件ABAQUS以及Fortran自编的VUSDFLD子程序,建立粉末轧制的有限元模型,并与实际试验进行了比对.结果表明:模拟结果中的板料相对密度和板料厚度与实际实验结果吻合较好,最大误差为4.47%,说明Drucker-Prager/Cap塑性模型对粉末轧制工艺研究有参考意义.
In this work, comprehensive magnetotransport studies have been carried out to examine the electronic and magnetic properties of ferroic perovskite oxide thin films, nanostructures and heterostructures. We employ planar Hall effect (PHE) to probe the in-plane magnetocrystalline anisotropy (MCA) of (La,Sr)MnO3 (LSMO) th…
Susceptibility to intergranular corrosion in welded joints of austenitic stainless steel X5Cr-Ni18-10 was tested. The welding was performed with different intensity of welding current (110 A, 130 A and 150 A). The tests were performed using electrochemical potentiokinetic reactivation method with double loop (DL EPR m…
Vorfalle in der Vergangenheit zeigten, dass Rohrleitungen fur den Transport komprimierbarer Gase und Flussigkeiten u. U. zu duktiler Rissausbreitung neigen, wenn Schaden an den Rohren vorliegen. Um diese Vorfalle zu vermeiden, ist die Kenntnis der Brucheigenschaften von Rohrleitungsstahlen von groser Bedeutung. Haufig…