Materials Literature
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Polystyrene (PS) has a wide range of technological applications due to the excellent bulk properties, but does not possess the unique surface properties for applications that require wettability, printability or cell adhesion. The following work focuses on surface modification of polystyrene by different techniques to…
The influence of magnetic-wave field on the thermal conductivity and microhardness of dispersion-filled polymer composites materials is examined
Proyecto de Graduación (Licenciatura en Ingeniería en Construcción). Instituto Tecnológico de Costa Rica, Escuela de Ingeniería en Construcción, 2012.
Katı madde taşınımının önceden hesaplanabilmesi, taşkın kontrolünde, barajlarda, sulama şebekelerinde vs. bu yapıların en iyi şekilde tasarlanmasında ve kullanımında etkili parametrelerden biridir.Bu çalışma kapsamında katı madde taşınımı problemi bir boyutlu olarak sonlu hacimler yöntemi kinematik dalga yaklaşımı ile…
Zuckersäureester zeichnen sich durch eine außerordentliche Reaktivität an ihren Carbonylfunktionen aus und vor allem die Aminolyse dieser aktivierten Ester ist von Interesse, da sie um Größenordnungen schneller abläuft als die von einfachen Estern. Die Amide entstehen hierbei schon bei Raumtemperatur auf der Minuten-…
TiFe intermetallic compound powder was coated by polymers polytetrafluoroethylene (PTFE) and polymethyl methacrylate (PMMA) using the mechanical treatment in high-energy planetary ball mill. The resulting metal-polymer composites have been studied by electron microscopy, differential scanningcalorimetry, thermogravime…
Compression of pipe parts in matrixes with funnel angles in 300, 450 and 600 is analyzed. The forms of loss of stability and corresponding to them parameters of initial thick-walled pipe parts and the tools are revealed. It is received quantitative evaluation of a thickening of the wall of the swaged pipes for a numbe…
The development of clean, sustainable chemical processes is a key priority towards meeting the growing demand for synthetic functional chemicals, while balancing rapidly depleting natural resources. The selective oxidation (selox) of crotyl alcohol to crotonaldehyde and the selective hydrogenation of benzyl cyanide to…
Les états spatialement localisés sont des solutions physiques possédant une structure spatiale particulière en une région bien définie d'un domaine structuré différemment. Nous nous intéressons aux états spatialement localisés susceptibles de se former lorsqu'une convection d'origine thermique est couplée à une convec…
The intensification of fast exothermic reactions can be achieved by using microstructured reactors (MSR) which provide improved mass & heat transfer rates leading to higher overall reaction kinetics. But for highly exothermic reactions the heat evacuation becomes not efficient enough and unwanted hot spots are formed.…
\n\t\t\t\t\tThe effects of strain rate on compressive and tensile strength of fly ash based geopolymer concrete were investigated experimentally. Four mixes of geopolymer concrete using different alkaline solutions and under vary curing conditions were prepared. One mix of ordinary Portland cement (OPC) concrete was p…
1 Dipartimento di Scienze dell’Ambiente e del Territorio, Universita degli Studi di Milano Bicocca, Milano, 20126 2 Dipartimento di Chimica Inorganica Metallorganica e analitica, Universita degli Studi di Milano, Milano, 20133 3 Dipartimento di Fisica, Universita degli Studi di Milano, Milano, 20133 4 INFN Genova e Di…
It is hard to deny that LED dresses look cool, but designing with LEDs might seem a bit limited because if LEDs are placed too far from the microcontroller, construction often becomes more complex. Even with highly conductive thread, the length of the thread becomes an issue if you use threads that are too long becaus…
In this work we examine the performance of particle-based models with respect to the Ni-YSZ composite anode system. The conductivity and triple-phase boundary (tpb) of particle-based systems is estimated. The systems considered have mono-dispersed particle size distributions, bi-modal particle size distributions with…
In article various ways of the description of a microrelief of the processed surface are considered. Merits and demerits for visualization of the processed rough blanket are considered
A numerical model of a paper sheet was created using a Level-Set method to analyse a vacuum dewatering process. A 2D representation of the paper model was created in Matlab with randomly positioned circular fibres and identical orientation in one dimension. The model considers the influence of the forming fabric which…
Bu çalışmada endüstride yatak çeliği olarak kullanılan 21NiCrMo2 çeliği ağırlıkça %100 B2O3, %70 B2O3 +%30 SiC, %70 B2O3 +% 30 B4C, % 30 B2O3 + %70 SiC, %30 B2O3 + %70 B4C pasta karışımları kullanılarakplazma pasta borlanmıştır. Plazma pasta borlama (PPB) işlemi, 700, 750 ve 800 °C de 2, 5 ve 7 saat süresince%70H2 – %…
The forecast and assessment of a thermal condition of the person in protective clothes in difficult conditions of the environment is carried out by means of mathematical modeling. In this time various approaches of geometrical representation of the system «Person — Clothes — Environment» are used. In this article the…
The article is devoted to the disturbed region of the bar during the action of constant longitudinal load. The dynamics of the construction is described by new specified univariate dynamical equations of longitudinal strain. These equations are derived from asymptotic-group analysis of three-dimensional dynamical equa…
The paper reviews modern centrifugal pumps used in housing and communal services. It gives the opportunity of their classification. New methods of their recovery are studied and new technologies with polymeric compound materials.