Materials Literature
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To reduce the environmental impact of mechanical parts, an approach integrating structural design and material selection was studied. Adding the discrete variable of material, a hybrid optimization model was built with the aim of minimizing environmental impact and based on an ordinary structure optimization model. An…
The influence of polarity on orientational elasticity and on structures formed in the director field is studied in free-standing smectic films. Periodic stripe patterns and 2π-walls in a magnetic field are investigated. Measurements are performed on a nonpolar racemic mixture, on an optically pure ferroelectric compou…
Whatever our specific field of expertise, we all have to deal with interfaces, whether we are involved in designing the large interfaces in high voltage cable accessories or whether we try to tailor the interface properties on a very small scale in nanocomposites. Whereas many of us study the properties of new insulat…
The raman scattering (RS) spectra of graphene on semi-insulating and conductive 6 H -SiC substrates formed by preliminary and additional annealing of silicon carbide at various temperatures are studied. The degree of perfection of the graphene films and sizes of its clusters are estimated. It is shown that the tempera…
Multiferroic composite magnetoelectric (ME) sensors are based on the elastic coupling of a magnetostrictive phase and a piezoelectric phase. A deformation of the magnetostrictive phase causes strain in the piezoelectric phase and thus an induced voltage. Such sensors may be applied both for static as well as for dynam…
The structural changes in DNA caused by the combined effects of TiO2 nanoparticles (TiO2 NPs) and doxorubicin (DOX) were investigated along with their corresponding inhibitory roles in the growth of T47D and MCF7 cells. The UV-visible titration studies showed that DOX+ TiO2 NPs could form a novel complex with DNA. The…
For this contribution, different oscillation modes of a 20 microliter water droplet on the hydrophobic surface of a silicone rubber insulator under tangential AC electric field stress were investigated, using a high speed camera. Since the deformation of water droplet increases the local electric field stress at the t…
This study reports the structure and the magnetic properties of Zn1−x Ni x S nanocrystalline films with Ni composition ratios of 0.05 ≤ x ≤ 0.2. Thin films of Zn1−x Ni x S were deposited on Corning glass substrates by using an electron-beam evaporation method. X-ray diffraction patterns revealed single- phase films wi…
We have fabricated multi-layer graphene (MLG) wiring and demonstrated a resistivity of the same order as Cu and reliability better than Cu. The MLG was synthesized epitaxially by chemical vapor deposition (CVD) on an epitaxial Co film, resulting in quality and electrical properties as good as those of a graphite cryst…
The air-retaining property of the hydrophobic surface can be widely employed in many applications. This study is carried out to enhance this property by biomimicking the structure ofSalvinia molestafloating leaves, which features hydrophilic patches on a superhydrophobic structure. Different from the existing lotus st…
A new approach has been made to determine electroconductive properties of a textile product on the basis of the idea of Van der Pauw method. This method is used to determine only two characteristic resistances associated with four electrodes. Surface resistivity of the sample is not determined because this technique r…
In this research, the renewable source, tapioca starch (TS) is used as the subject to improve the degradability of injection moulded plastic packaging. The TS blended with low density polyethylene (LDPE) was melt compounded using a twin screw extruder at screw speed at 70-80 rpm, barrel temperature range at 150, 130,…
The polarized Raman spectra of deuterated potassium dihydrogen phosphate crystals with different deuterium concentrations are measured. With the increasing deuterium concentration, the Raman peaks which are assigned as the internal vibrations of the (H/D) 2 PO − 4 anion shift to lower wavenumbers. This red-shift contr…
Studies of woven fabric comfort properties have aroused the interest of researchers in recent years. Although studies on the structures of woven terry fabrics are rather limited, the study of the comfort properties these fabrics will reveal new approaches regarding the subject. The terry-structured fabrics, used in ba…
Magnetite thin films (10–300 nm) are deposited on different substrates including single crystals ((0001)-Al 2 O 3 , (001)-Si, (110)-SiO 2 ), textured polycrystalline oxide underlayers (ZnO), amorphous glass, at temperature from room temperature to 550 °C by the pulsed laser deposition technique. Strong (111)-texture c…
Measurement of partial discharge (PD) in high voltage equipment is widely used in condition assessment and performance maintenance of the insulation system. One of the methods to evaluate PD data from condition monitoring activities is by analysing PD signals captured from the PD detection equipment. In high voltage p…
SBA-15 type ordered silicas possessing amino groups attached onto their surfaces were prepared by using two different functionalization methodologies. These matrices were used for the cephalexin adsorption from aqueous solution and further kinetic study of its release into physiological solution. The materials were ch…
This paper investigates the impacts of weave structures and weft density on the Poisson's ratio of worsted fabric under uniaxial extension. In this study nine groups of worsted fabrics comprising of three weave structures (twill 2/2, twill 3/1 and hopsack 2/2), each produced in three different weft densities were exam…
Insulation systems are subjected to environmental stresses such as temperature and moisture. These atmospheric stresses cause ageing of polymeric dielectric materials through change in material properties. Under application of DC field, ageing might affect the accumulation of space charge within the dielectric materia…
Atualmente há um expressivo aumento no consumo de cimento, aliado à crescente preocupação ambiental inserida dentro do processo industrial. Com o intuito de amenizar impactos gerados pelo consumo de matéria-prima e emissão de CO2 para a atmosfera, foi realizado um estudo em laboratório no qual a escória do forno panel…