Materials Literature
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The graphite structure is self-consistently calculated by use of the all electron Modified Augmented Plane Wave (MAPW) scheme with lattice constants considerably enlarged above the experimental value of graphite. Overall, the band structures of the series are found to be quite similar: the energy levels of the highly…
Equations (13)–(18) in the paper by Touaa & Sekkal [(2012), Acta Cryst. B68, 378–388] are corrected.
In this paper we report a new set of accurate measurements of guided mode resonances coupled in a negative photonic crystal slab. Narrow peaks are visible in the reflection spectrum with a full-width at half maximum (FWHM) of less than 2 nm. In addition to the traditional measurements of the reflected signal, we prese…
Korišteno motorno ulje je jedna od najčešće recikliranih sirovina. Rerafinacija korištenih ulja obezbjeđuje uštedu energetskih i petrohemijskih sirovina, prije svega sirove nafte, i smanjuje zagađenje životne sredine. U ovom radu izvršena su ispitivanja koja imaju za cilj da potvrde mišljenje da se rerafinacijom koriš…
A lateral-grating-assisted lateral co-directional coupler (LGLC) type tunable laser with high optical power and low power consumption is proposed. An approach to reduce the injection current in the gain section, by means of a new laser design, provide the power consumption of the LGLC laser from 0.25 to 0.13 W. The LG…
Two types of square-shaped self-assembled CrN nanoislands of monoatomic layer are fabricated on the Cu(001) substrate. The island edges are commonly oriented along the ⟨110⟩ directions, and the islands locally form a two-dimensional square superstructure. The mean height is either 0.09 or 0.18 nm, and the average late…
The engineering of the propagation constant in integrated silicon nitride waveguides is numerically investigated. We compare several geometrical designs and show that fairly large chromatic dispersion control is obtained when the transversal dimensions are modified.
The purpose of this thesis was to synthesize biodegradable polyesters from a wide array of functionalized ¿-hydroxy acids. The initial strategy was to use amido-functionalized ¿-hydroxy acids and 2-bromopropanoyl bromide to form amido-functionalized cyclic diesters. Then, the resulting cyclic diesters would be used in…
The Stress-Strain Microprobe® (SSM) system that utilizes an in-situ nondestructive Automated Ball Indentation (ABI) test technique was used to monitor the changes in tensile and fracture toughness properties of hydrogen transmission pipeline steels. Fracture toughness was calculated from integration of the ball indent…
In the preparation of small organic paramagnets, these structures may conceptually be divided into spin-containing units (SCs) and ferromagnetic coupling units (FCs). The synthesis and direct observation of a series of hydrocarbon tetraradicals designed to test the ferromagnetic coupling ability of m-phenylene, 1,3-cy…
In this article, the performance to the corrosion of cement mortars added with a petrochemical industry waste, in environments contaminated with chlorides (sodium chloride, NaCl 3.5%) and/or carbonic anhydride, CO2(3% CO2, 65% RH and 25 ° C), is analyzed. A waste, named catalyst catalytic cracking residue (FCC), from…
We clarify via molecular dynamic simulations and theoretical analysis the origin of dislocation creation and void nucleation during uniaxial tensile process in face-centered-cubic (FCC) ductile metals. We show that the dislocations are created through three distinguished stages: (i) Flattened octahedral structures (FO…
In hydrogen diffusion in metals, we have to consider not only the hydrogen flux driven by hydrogen concentration but also the hydrogen flux driven by hydrostatic stress.Such hydrogen diffusion is a multi-physics problem coupled hydrogen diffusion with a stress field.We developed a three-dimensional computer program fo…
Biofilters are used to treat liquid waste effluents or gas waste streams. A high biomass concentration can be maintained within systems treating fluids with attached microorganisms that lead to an efficient treatment with a more compact treatment system. The great problem in biofiltration systems remains that in many…
Laminated fibrous composite plates are finding a wide range of applications in structural design, especially for their light weight and high stiffness and strength. In this article, a genetic algorithm based optimum design method is presented to maximize fundamental frequency of laminated composite plates under any co…
Recently, the researches of hydrogen energy have been developed. However, the hydrogen penetrates into the metal and it causes hydrogen embrittlement. Concerning the investigation of hydrogen embrittlement, in spite of the fact that stile studies have been conducted for many years, the mechanism of hydrogen embrittlem…
We derive ab inito exchange parameters for general non-collinear magnetic configurations, in terms of a multiple scattering formalism. We show that the general exchange formula has an anisotropic-like term even in the absence of spin-orbit coupling, and that this term is large, for instance for collinear configuration…
En este trabajo se presenta el estudio de crecimiento de un tipo de nano estructuras calcopiritas CuGaSe 2 sobre un substrato de Silicio (Si), haciendo uso de un MBE (Molecular Beam Epitaxy) y realizando analisis con un AFM (Atomic Force Microscope) y un SEM (Scanning electron Microscope). El crecimiento se realiza po…
This thesis describes crystallographic, magnetic and electrical studies of some mixed metal perovskites. In the first part, the charge distribution, magnetic and electrical properties of mixed metal rhodium-copper perovskite oxides were investigated. Various series with the general formula Ln1-yAyRh1-2xCuxBxO3 in whic…
This work presents the preparation and characterization of nanofibers of poly (L-lactic acid) (PLLA) / poly (-caprolactone) (PCL) through electrospinning and rotary jet spinning processes for the production of fibers aiming future applications as scaffolds for tissue engineering. The blends were prepared using the two…