Materials Literature
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The tensile properties of polypropylene (PP) filled with two A-glass beads with the same size, PP/3000 (glass bead surface pretreated with a silane coupling agent) and PP/3000U (no surface pretreatment), have been measured by using an Instron materials testing machine at room temperature, to identify the effects of th…
The temperature and particle size dependencies of the linewidth of spectral holes burned in the ${}^{7}{\stackrel{\ensuremath{\rightarrow}}{{F}_{0}}}^{5}{D}_{0}$ transition of ${\mathrm{Eu}}^{3+}$ ions in ${\mathrm{Eu}}_{2}{\mathrm{O}}_{3}$ are calculated and compared with experiment. The power-low temperature behavio…
Microturbines and fuel cells are currently attracting a lot of attention to meet future users needs in the distributed generation market. This paper addresses a preliminary analysis of a representative state-of-the-art 50-kW microturbine coupled with a high-temperature solid-oxide fuel cell (SOFC). The technologies of…
Abstract A general method is proposed for the synthesis of robust, nonlinear controllers for spatially homogeneous particulate processes described by population balances including time‐varying uncertain variables. The controllers are synthesized via Lyapunov's direct method on the basis of finite‐dimensional approxima…
A structural phase transition and the equation of state of the simple-hexagonal (sh) phase, $P\ensuremath{-}V,$ of phosphorus were investigated at pressures up to 280 GPa using monochromatic synchrotron x-ray diffraction. The $P\ensuremath{-}V$ phase, which was stable above 137 GPa, has shown a structural transition t…
Abstract Catalytic performance of Ir catalysts for reduction of nitric oxide with carbon monoxide in the presence of SO2 and excess oxygen was investigated. NO was selectively reduced with CO on Ir/silicalite in an oxidizing atmosphere containing 1% to 10% O2 in the temperature range of 300-500 °C. The catalytic activ…
A new approach to the numerical modeling of inductive plasmas is presented. The governing magnetohydrodynamic equations are discretized in a second-order accurate finite volume manner. A straightforward pressure-stabilized flow field solver is introduced as an alternative to the staggered-mesh solvers used in traditio…
In previous works, the processing of plasticized PVC reinforced by cellulose nanocrystalline whiskers has been presented, as well as its mechanical behavior in the linear viscoelastic domain. The purpose of this work is now to evaluate and model the plastic behavior of such material. Compression tests are performed in…
We have constructed polymer-stabilized nematic liquid crystals by photopolymerizing diacrylate monomers in the nematic phase. The orientation of the liquid crystal was controlled by the polymer network. We studied the Freedericksz transition in these systems. Experimentally we studied the transition by measuring the c…
Laminated composite beams containing magnetostrictive layers are modeled as distributed parameter systems and the magnetostrictive layers are used to control the vibration suppression. Velocity feedback with constant gain distributed controller is chosen to achieve vibration suppression. A general formulation of the p…
Grinding lanthanum oxide (La 2 O 3 ) with Al 2 O 3 was conducted to investigate their mechanochemical reactions to form lanthanum aluminate (LaAlO 3 ) powder using a planetary ball mill. Grinding for 120 min allowed us to obtain single‐phase LaAlO 3 with a large surface area when transition alumina was used, whereas n…
We have studied the occurrence of superconductivity under pressure in the ${\mathrm{CaSi}}_{2}$ family of compounds, namely the semimetallic trigonal phase and the $\ensuremath{\alpha}\ensuremath{-}{\mathrm{ThSi}}_{2}$-type tetragonal one. Although only the latter is superconducting ${(T}_{c}=1.56\mathrm{K})$ at ambie…
Synopsis Today’s shampoo formulations are beyond the stage of pure cleansing of the hair. Additional benefits are expected, e.g. conditioning, smoothing of the hair surface, improvement of combability and lather creaminess. Cationic polymers play an important role in providing many of those features. Therefore, within…
Abstract Layered polymer/calcium carbonate (CaCO3) composite films have been successfully obtained by alternate repetition of spin-coating of polysaccharides and thin film crystallization of CaCO3 in the presence of an acid polymer. SEM images show layered structures consisting of brick of the inorganic crystal and mo…
Experimental data for the temperature dependence of relaxation times are used to argue that the dynamic scaling form, with relaxation time diverging at the critical temperature T(c) as (T-T(c))(-nuz), is superior to the classical Vogel form. This observation leads us to propose that glass formation can be described by…
The optical properties of ${\mathrm{Nd}}^{3+}$ ions in six different compositions of glasses based on ${\mathrm{GeO}}_{2},$ PbO, and ${\mathrm{Bi}}_{2}{\mathrm{O}}_{3}$ have been investigated by using steady-state and time-resolved laser spectroscopy. Judd-Ofelt parameters were derived from the absorption spectra and…
Ferrite nanocrystals have been synthesized by use of functionalized surfactantsto give nanoparticles doped with 3.5 % in mass of cobalt ions. These nanoparticles can be aligned on a substrate on a very large scale when the particles are deposited in the presence of a magnetic field (see Figure). In the absence of an a…
The crystallization behavior of nitrogen-doped amorphous Ge 2 Sb 2 Te 5 -(N) phase-change thin films was studied by utilizing differential scanning calorimetry, in situ ellipsometry and in situ transmission electron microscopy. The combined analysis of in situ ellipsometry isotherms of amorphous Ge 2 Sb 2 Te 5 -(N) fi…
A systematic study has been made of some of the properties of R2, the most dominant paramagnetic defect produced in type-IIa diamond by electron irradiation. R2 has been produced in high-purity synthetic diamonds, which have been irradiated with 2 MeV electrons in a specially developed dewar, allowing irradiation down…
Decreased hepatocyte adhesion to polymeric constructs limits the function of tissue engineered hepatic assist devices. We grafted adhesion peptides (RGD and YIGSR) to polycaprolactone (PCL) and poly-L-lactic acid (PLLA) in order to mimic the in vivo extracellular matrix and thus enhance hepatocyte adhesion. Peptide gr…