Materials Literature
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We study grain-scale mechanical and geometrical features of partially crystallized packings of frictional spheres, produced experimentally by a vibrational protocol. By combining x-ray computed tomography, 3D image analysis, and discrete element method simulations, we have access to the 3D structure of internal forces…
Continuous hydrogenation of glucose to sorbitol was studied in an experimental set-up with parallel screening multiphase reactors.
The dielectric function of orthorhombic ${{\mathrm{Cu}}_{2}\mathrm{CdGeS}}_{4}$ and ${{\mathrm{Cu}}_{2}\mathrm{CdSiS}}_{4}$ single crystals (space group $Pmn{2}_{1}$) is measured experimentally in the spectral range of 0.7--5.2 eV, and the results are interpreted via comparison with ab initio calculations. Polarized R…
ABSTRACT This article demonstrates the successful fabrication of thin‐film‐composite (TFC) membranes containing well‐defined soft‐hard‐soft triblock copolymers. Based on “hard” polyimide (PI) and “soft” polydimethylsiloxane (PDMS), these triblock copolymers (PDMS‐b‐PI‐b‐PDMS), were prepared via condensation polymeriza…
Thermal effects in transparent laser crystals and ceramics are generally an unwanted consequence of the pumping process: temperature gradients give rise to an unevenly distributed refractive index variation and a distortion of the optical surfaces crossed by the laser beam (thermal lens); birefringence due to thermome…
Abstract To overcome the well‐known carbon electrodes surface fouling of phenols, we report on a simple and rapid method for the preparation of a disposable porous Cu‐modified graphite pencil electrode (Cu‐GPE) for sensing 4‐nitrophenol (4‐NP). The bare‐ and Cu‐modified graphite pencil electrodes were characterized by…
High speed motors that develop rotational speeds in excess of 5000 rpm are necessary for centrifugal and screw compressors, blowers, grinding machines, mixers, pumps, machine tools, textile machines, drills, handpieces, aerospace, flywheel energy storages, etc. The actual trend in high speed electromechanical drives t…
The plastic anisotropy of AA3103 sheets in the cold-rolled condition (H18 temper) and in the fully annealed condition (O temper) was studied experimentally and numerically in this work. The microstructure and texture of the two materials were characterized and the anisotropic plastic behaviour was measured by in-plane…
Previously unknown ladder-type heteroacenes were synthesized in just two steps from aromatic amines, 2-nitrobenzaldehydes, and biacetyl. A recently discovered multicomponent process affording 1,4-dihydropyrrolo[3,2-b]pyrroles was followed by the Cadogan reaction, which resulted in simultaneous closure of two additiona…
Charge equalization of series connected energy storage elements (batteries and super-capacitors) has significant ramifications on their life and also reduces their operational hazards. This paper reviews the current status and art of power electronics converter topologies employed for charge equalization of Li-ion bat…
Electrical machines have been widely used for many applications, ranging from electric and hybrid electric vehicles, renewable energy including wind power generators, more electric aircrafts, industrial drives, automations, to domestic appliances etc. This paper overviews the recent developments in innovative electric…
Thermal conductance measurements are performed on individual polystyrene nanowires using a novel measurement technique in which the wires are suspended between two bi-material microcantilever sensors. The nanowires are fabricated via electrospinning process. Thermal conductivity of the nanowire samples is found to be…
A novel sample holder is introduced which allows for temperature dependent soft x-ray absorption spectroscopy of liquids in transmission mode. The setup is based on sample cells with x-ray transmissive silicon nitride windows. A cooling circuit allows for temperature regulation of the sample liquid between -10 °C and…
Bubble formation from paper insulation during overload is important to understand because it can cause a transformer to fail. This phenomenon has been investigated in a mineral oil-paper system, but not in vegetable oil. This study investigated bubble formation during overload in a vegetable oil impregnated paper syst…
Thermoresponsive core-shell microgels with degradable core are synthesized via surfactant based free radical polymerization using N,N'-(1,2-dihydroxy-ethylene)bis(acrylamide) (DHEA) as a cross-linker for core preparation. The 1,2-glycol bond present in DHEA is susceptible to NaIO4 solution, and thus, the structure can…
The Orbital-Angular-Momentum (OAM)-carrying radio waves may provide extra rotational degree of freedom, which may potentially increase channel capacity and spectrum efficiency for future wireless communications. It has been demonstrated that circular antenna array could radiate OAM-carrying radio beam by feeding each…
During the entire period of transformer's service, the internal parts get ageing gradually. But the aging degree of each part cannot be observed directly. To correctly master the condition of the transformer contributes to the prediction of the risk and reliability of the transformer, and also, this is the foundation…
The transmission characteristics of microwaves passing through one-dimensional plasma photonic crystals (PPCs) have been investigated by experiment and simulation. The PPCs were formed by a series of discharge tubes filled with argon at 5 Torr that the plasma density in tubes can be varied by adjusting the discharge c…
Highly advanced phase-change hybrids (PCHs), which consist of a phase-change material and conjugated polymer, were developed for new sensor and actuator applications. PCH films with excellent characteristics were obtained simply by depositing various molten paraffin waxes (PWs) in situ onto poly(diphenylacetylene) (PD…
In this present study, the microstructural and mechanical behaviour of Al-Mg-Si alloy matrix composites reinforced with silicon carbide (SiC) and Corn cob ash (An agro‑waste) was investigated. This research work was aimed at assessing the suitability of developing low cost- high performance Al-Mg-Si hybrid composite.…