The demand and operation of car service centers

© 2016, Research India Publications.The factors influencing the uneven demand for services are examined, the mechanism of adaptation of car service company to the fluctuations of demand is offered taking into account seasonal factors, the use of probabilistic approach and the principles of queueing theory

Understanding the structure and reactivity of NiCu nanoparticles: An atomistic model

The structure of bimetallic NiCu nanoparticles (NP) is investigated as a function of their composition and size by means of Lattice MonteCarlo (LMC) and molecular dynamics (MD) simulations. According to our results, copper segregation takes place at any composition of the particles. We found that this feature is not size-dependent. In contrast, nickel segregation depends on the NP size. When the size increases, Ni atoms tend to remain in the vicinity of the surface and deeper. For smaller NPs, Ni atoms are located at the surface as well. Our results also showed that most of the metal atoms segregated at the surface area were found to decorate edges and/or form islands. Our findings agree qualitatively with the experimental data found in the literature. In addition, we comment on the reactivity of these nanoparticles.Fil: Quaino, Paola Monica. Universidad Nacional del Litoral. Instituto de Química Aplicada del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Química Aplicada del Litoral.; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Programa de Electroquímica Aplicada e Ingeniería Electroquímica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Belletti, Gustavo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional del Litoral. Instituto de Química Aplicada del Litoral. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Química Aplicada del Litoral.; Argentina. Universidad Nacional del Litoral. Facultad de Ingeniería Química. Programa de Electroquímica Aplicada e Ingeniería Electroquímica; ArgentinaFil: Shermukhamedov, S. A.. Kazan National Research Technological University; RusiaFil: Glukhov, D. V.. Kazan National Research Technological University; RusiaFil: Santos, Elizabeth del Carmen. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Física Enrique Gaviola. Universidad Nacional de Córdoba. Instituto de Física Enrique Gaviola; Argentina. Institute of Theoretical Chemistry; Alemania. Universitat Ulm; AlemaniaFil: Schmickler, Wolfgang. Universitat Ulm; Alemania. Institute of Theoretical Chemistry; AlemaniaFil: Nazmutdinov, Renat. Kazan National Research Technological University; Rusi

Orbital overlap effects in electron transfer reactions across a metal nanowire/electrolyte solution interface

In this paper, we report on calculations of the orbital overlap between Fe(III) and Cr(III) aquacomplexes and different electrode surfaces: Cu(111), Ag (111), Au(111), Pt(111), and corresponding monatomic wires. The electronic structure of the monocrystalline surfaces and nanowires are described in terms of the electronic spillover and density of electronic states at the Fermi level obtained from periodic density functional theory (DFT) calculations. The transmission coefficients (κ) characterizing the first stage of outer-sphere electron transfer for the reduction of aquacomplexes are calculated on the basis of Landau–Zener theory as a function of electrode–reactant separation; the electronic transmission coefficients for the [Cr(H2O)6]3+/2+ redox couple were found to be smaller than those for [Fe(H2O)6]3+/2+. Two different intervals can be clearly distinguished for Cu, Au and Pt: “a catalytic region”, where κ(wire) > κ(Me slab) and “an inhibition region”, where κ(wire) < κ(Me slab). A similar behavior exhibits the coupling constant estimated for a hydrogen atom adsorbed at the Au(111) surface and the Au monatomic wire. These effects originate from some specific features of electronic density profile for metal nanowires: at short distances the electronic density of nanowires is higher compared with the (111) metal surfaces, while at larger separations it decreases more sharply.Fil: Nazmutdinov, Renat R.. Kazan National Research Technological University; RusiaFil: Berezin, Alexander S.. Kazan National Research Technological University; RusiaFil: Soldano, Germán. Universitat Ulm; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Schmickler, Wolfgang. Universitat Ulm; Alemani

A research of technical condition of a paint and varnish covering of a body of the car before holding repair actions

© TJPRC Pvt. Ltd. In the article "Investigation of the technical state of paint and varnish coating of the body of a car before and after repairs" the main results of studies of the technical state of the paint coating of the car body panels in the process of operation before the occurrence of the road accident and after the repair are presented. The relevance of scientific research in this work is that the issues related to the assessment of the technical condition of the body paintwork are not fully understood, especially for cars that are repainted due to damage of varying degrees of complexity as a result of emergencies, mainly after road accidents. The data obtained in this article can be used to analyse the technology of body repair, improve the methods for calculating damage caused by the accident, correcting the amount of natural physical wear of the vehicle, in the educational process for secondary special (professional) and higher educational institutions in the preparation of auto-oriented students. The results of the work make a significant contribution to increasing the efficiency of the operation of cars based on the technical condition of the protective coating of the tail of the body before and after the repair activities related to the preparation and painting operations. The scientific novelty of the article is to obtain the results of observations of the technical condition of the paintwork at the factory and repair painting of the body

Dipole moments of organophosphorus compounds. 16. Conformations of trimethylsilyl groups in some phosphites, phosphates, and phosphonates

1. A study has been made of the dipole moments, Kerr constants, and IR spectra of silicon-containing phosphites, phosphates, and phosphonates. 2. The silicon-containing phosphates and phosphonates exist as equilibrium mixtures of various conformers, the predominant form being that in which the P=0 (S, Se) and (CH3)3SiO groups are in cis orientation. 3. The trimethylsilyl group preferentially occupies a gauche position with respect to the unshared electron pair of the phosphorus atom in compounds containing phosphorus in three-coordination. © 1978 Plenum Publishing Corporation

The demand and operation of car service centers

© 2016, Research India Publications.The factors influencing the uneven demand for services are examined, the mechanism of adaptation of car service company to the fluctuations of demand is offered taking into account seasonal factors, the use of probabilistic approach and the principles of queueing theory

The demand and operation of car service centers

© 2016, Research India Publications.The factors influencing the uneven demand for services are examined, the mechanism of adaptation of car service company to the fluctuations of demand is offered taking into account seasonal factors, the use of probabilistic approach and the principles of queueing theory

The demand and operation of car service centers

© 2016, Research India Publications.The factors influencing the uneven demand for services are examined, the mechanism of adaptation of car service company to the fluctuations of demand is offered taking into account seasonal factors, the use of probabilistic approach and the principles of queueing theory