Materials Literature
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There is a broad range of material choices for on-road and off-road exhaust systems. The final selection of the materials depends on the balance of engineering performance of the materials and the cost. Thermal-cycling resistance of exhaust materials is an extremely important criterion for the long-term durability and…
Dialkyl 2,2′-bipyridine-4,4′-dicarboxylate derivatives are non-mesogenic ligands capable of supporting liquid crystalline phase formation when coordinated with a variety of metals. Herein is described a preliminary study on altering stable temperature ranges of thermotropic mesophases through metal centre selection an…
A fundamental study to experimentally analyze the effect of cavitation in common-rail diesel nozzles on the soot formation process was carried out. The soot content was characterized by measuring the soot radiation, and an original methodology was developed to suitably characterize the soot formation process from this…
Molecular dynamics (MD), coupled with fluorescence data for charged dipeptides of tryptophanyl glutamic acid (Trp-Glu), reveal a detailed picture of how specific conformation affects fluorescence. Fluorescence emission spectra and time-resolved emission measurements have been collected for all four charged species. MD…
Direct injection gasoline engines have the potential for improved fuel economy through principally the engine down-sizing, stratified charge combustion, and Controlled Auto Ignition (CAI). However, due to the limited time available for complete fuel evaporation and the mixing of fuel and air mixture, locally fuel rich…
A dual-frequency circularly polarized offset reflectarray antenna for Ka-band satellite communication is presented. The reflectarray is designed using the concentric dual split-loop element which enables full 360° phase adjustment simultaneously in two separate frequency bands. The elements have been optimized to supp…
In this framework, we deal with the problem of the fast evaluation of the far-field radiated by an ARA. This problem arises to be very relevant when synthesizing such radiating structures, especially when fully exploiting all the available degrees of freedom is mandatory to achieve high performance, since the evaluati…
A simple novel compact independent tri-band printed-IFA loaded with inspired metamaterial for WIMAX-WLAN communication applications is presented in this paper. In addition to the regular printed IFA resonance for lower WLAN band, the metamaterial-inspired loading is exploited to create a second resonance for WIMAX ban…
LEMA
In this work we present a simple reconfigurable reflectarray (RRA) unit cell general topology and implementation, which allows the independent control of the phase and polarization of the reflected electromagnetic wave. The 1-bit phase control (with 180 degrees step) and the polarization selection between two orthogon…
The geometrical model introduced previously by the authors has been extended quantitatively to document changes in angular correlations between and among residues as azurin unfolds. In the early stages of denaturation, these changes are found to be more pronounced than changes in the spatial displacement of residues,…
Se estudió la estructura y dinámica del fitoplancton del embalse Yacyretá en relación con las principalesvariables limnológicas durante el periodo diciembre de 2004 a noviembre de 2005, a 10 años del llenado del embalse.Las muestras cualitativas y cuantitativas fueron recolectadas en 6 estaciones, previamente seleccio…
The mean-field theory for noninteracting disordered electron systems is widely and successfully used to describe equilibrium properties of alloys over the whole range of disorder strengths. However, it fails to take into account the effects of quantum coherence and localizing backscattering effects when applied to tra…
High-gain metamaterial lens antennas offer significant advantages for the construction of compact, high-efficiency, and lightweight antenna systems. Many such antennas use a homogeneous slab of uniaxial Zero-Index Metamaterial (ZIM) to perform the collimation due to the relative simplicity of design and construction,…
The heating and cooling systems are an important issue in the development of fully electric vehicles (FEVs). On the contrary to vehicles with thermal engines, in FEVs there is almost no waste heat available for the heating of the cabin or for the window de-icing and defogging. The cooling of the cabin also demands a l…
In vitro cultures of Blackstonia perfoliata (L.) Hudson, a popular medicinal plant, were initiated. Regenerated plants and callus tissue were obtained and then analysed for secoiridoids.
We have studied the electronic transport behaviour and band offset properties of the epitaxial TiO2−x (x = 0.05)/La0.7Sr0.3MnO3 hetero-structure. The bilayer shows non-linear I-V characteristics at different temperatures as well as negative magneto-resistance with the application of magnetic field. Valence band offset…
Agricultural soil processing belongs to the basic elements in the process of crop production. Currently classic tillage method is decreasing and the only trend has stated as a shallow plowing. Suitable post harvest soil tillage greatly affects yields in the next cycle. The aim of the study is the analysis of abrasive…
Analytical expressions are presented for the intraband dyadic conductivity of graphene, fully taking into account its spatially dispersive nature for arbitrary values of the wavevector and the presence of a possible non-zero Fermi energy level. Such expressions are derived from the semi-classical Boltzmann transport e…
A kinetic study was proposed in pyrolysis process supplementary to thermo-gravimetric analysis. Three different biomasses, hazelnut shell, olive residue, and tea waste, and hazelnut shell and ultra-high molecular weight polyethylene mixture were analyzed kinetically in a batch-type tubular pyrolysis reactor. Reaction…