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Search Results: 1 - 10 of 473075 matches for " T. M. Nagiev "
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The Theory of Coherent Synchronized Reactions: Chemical Interference Logics  [PDF]
T. M. Nagiev
Materials Sciences and Applications (MSA) , 2015, DOI: 10.4236/msa.2015.62019
Abstract: Various types of possible interactions between reactions are discussed. Some of them are united by the general idea of chemical reaction interference. The ideas on conjugated reactions are broadened and the determinant formula is deduced; the coherence condition for chemical interference is formulated and associated phase shifts are determined. It is shown how interaction between reactions may be qualitatively and quantitatively assessed and kinetic analysis of complex reactions with under researched mechanisms may be performed with simultaneous consideration of the stationary concentration method. Using particular examples, interference of hydrogen peroxide dissociation and oxidation of substrates is considered. Therefore macrokinetic theory of coherent synchronized reactions is offered.
Meixner Oscillators
Natig M. Atakishiyev,Elchin I. Jafarov,Shakir M. Nagiev,Kurt B. Wolf
Physics , 1998,
Abstract: Meixner oscillators have a ground state and an `energy' spectrum that is equally spaced; they are a two-parameter family of models that satisfy a Hamiltonian equation with a {\it difference} operator. Meixner oscillators include as limits and particular cases the Charlier, Kravchuk and Hermite (common quantum-mechanical) harmonic oscillators. By the Sommerfeld-Watson transformation they are also related with a relativistic model of the linear harmonic oscillator, built in terms of the Meixner-Pollaczek polynomials, and their continuous weight function. We construct explicitly the corresponding coherent states with the dynamical symmetry group Sp(2,$\Re$). The reproducing kernel for the wavefunctions of these models is also found.
Changes in the Institutional Context of the Ombudsman System in the Republic of Hungary in 2012  [PDF]
Máté Szabó
Beijing Law Review (BLR) , 2012, DOI: 10.4236/blr.2012.33015
Abstract: After the landslide electoral victory of the Fidesz-KDNP in 2010, the new Hungarian government with a two-thirds majority in Parliament adopted a new Constitution which significantly modified the previous institutional structure. Written by the former Commissioner for Civil Rights (as the Ombudsman of general competence used to be called) who is now Commissioner for Fundamental Rights, this article describes, analyses and evaluates the changes which terminated the previous Ombudsman system consisting of four Commissioners and established an independent authority to uphold information rights on the one hand, and a unified Ombudsman structure with increased responsibilities and powers on the other hand.
Removal of Malachite Green Dye from Aqueous Solutions onto Microwave Assisted Zinc Chloride Chemical Activated Epicarp of Ricinus communis  [PDF]
M. Makeswari, T. Santhi
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.52023

Competitive adsorption of malachite green (MG) in single and binary system on microwave activated epicarp of Ricinus communis (MRC) and microwave assisted zinc chloride activated epicarp of Ricinus communis (ZRC) were analyzed. The preparation of ZRC from Ricinus communis was investigated in this paper. Orthogonal array experimental design method was used to optimize the preparation of ZRC. Optimized parameters were radiation power of 100 W, radiation time of 4 min, concentration of zinc chloride of 30% by volume and impregnation time of 16 h, respectively. The MRC and ZRC were characterized by pHzpc, SEM-EDAX and FTIR analysis. The effect of the presence of one dye solution on the adsorption of the other dye solution was investigated in terms of equilibrium isotherm and adsorption yield. Experimental results indicated that the uptake capacities of one dye were reduced by the presence of the other dye. The adsorption equilibrium data fits the Langmuir model well and follows pseudo second-order kinetics for the bio-sorption process. Among MRC and ZRC, ZRC shows most adsorption ability than MRC in single and binary system.

EDM Studies on Aluminum Alloy-Silicon Carbide Composites Developed by Vortex Technique and Pressure Die Casting  [PDF]
M. Kathiresan, T. Sornakumar
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2010, DOI: 10.4236/jmmce.2010.91007
Abstract: Aluminum based metal matrix composites (MMCs) offer potential for advanced structural applications when high specific strength and modulus, as well as good elevated temperature resistance, are important. In the present work, aluminum alloy-silicon carbide composites were developed using a new combination of vortex method and pressure die casting technique. Electrical Discharge Machining (EDM) studies were conducted on the aluminum alloy-silicon carbide composite work piece using a copper electrode in an Electrical Discharge Machine. The Material Removal Rate (MRR) and surface roughness of the work piece increases with an increase in the current. The MRR decreases with increase in the percent weight of silicon carbide. The surface finish of the machined work piece improves with percent weight of silicon carbide.
Reverse Monte Carlo Modeling of the Rigidity Percolation Threshold in GexSe1-x Glassy Networks  [PDF]
Moneeb T. M. Shatnawi
New Journal of Glass and Ceramics (NJGC) , 2015, DOI: 10.4236/njgc.2015.53005
Abstract: Based on Maxwell’s constraint counting theory, rigidity percolation in GexSe1-x glasses occurs when the mean coordination number reaches the value of 2.4. This corresponds to Ge0.20Se0.80 glass. At this composition, the number of constraints experienced by an atom equals the number of degrees of freedom in three dimensions. Hence, at this composition, the network changes from a floppy phase to a rigid phase, and rigidity starts to percolate. In this work, we use reverse Monte Carlo (RMC) modeling to model the structure of Ge0.20Se0.80 glass by simulating its experimental total atomic pair distribution function (PDF) obtained via high energy synchrotron radiation. A three-dimensional configuration of 2836 atoms was obtained, from which we extracted the partial atomic pair distribution functions associated with Ge-Ge, Ge-Se and Se-Se real space correlations that are hard to extract experimentally from total scattering methods. Bond angle distributions, coordination numbers, mean coordination numbers and the number of floppy modes were also extracted and discussed. More structural insights about network topology at this composition were illustrated. The results indicate that in Ge0.20Se0.80 glass, Ge atoms break up and cross-link the Se chain structure, and form structural units that are four-fold coordinated (the GeSe4 tetrahedra). These tetrahedra form the basic building block and are connected via shared Se atoms or short Se chains. The extent of the intermediate ranged oscillations in real space (as extracted from the width of the first sharp diffraction peak) was found to be around 19.6 ?. The bonding schemes in this glass are consistent with the so-called “8-N” rule and can be interpreted in terms of a chemically ordered network model.
The First Sharp Diffraction Peak in the Total Structure Function of Amorphous Chalcogenide Glasses: Anomalous Characteristics and Controversial Views  [PDF]
Moneeb T. M. Shatnawi
New Journal of Glass and Ceramics (NJGC) , 2016, DOI: 10.4236/njgc.2016.63005
Abstract: Anomalous structural characteristics of the so-called first sharp diffraction peak (FSDP) that arises in the total static structure functions of network-forming glasses and liquids at around 1-2?A-1 have been reviewed and discussed in details. Unlike other peaks in the static structure functions, the FSDP has anomalous dependencies on temperature, pressure and composition. Despite the fact that the FSDP is considered as a signature of intermediate range order (IRO) in network-forming glasses and liquids, its structural origin remains unclear and till now, it forms a subject of debate. A brief account for some anomalous characteristics of the FSDP followed by the different controversial interpretations about its structural origin has been reviewed and discussed. Some of the interpretations that seem to be inconsistent with recent experimental results have been ruled out. The most likely structural origins for the occurrence of the FSDP have been highlighted and discussed in details.
Metabolic Syndrome, and Cardiovascular Risk among Mentally Ill Patients  [PDF]
M. Umakanth, T. Gadambanathan
Journal of Biosciences and Medicines (JBM) , 2018, DOI: 10.4236/jbm.2018.68006
Abstract: Patients with serious mental illness have an increased prevalence of the metabolic syndrome in comparison to the general population. Metabolic syndrome is a constellation of cardiovascular risk factors including diabetes, hypertension, obesity and dyslipidemia. It is potentially reversible and may explain the higher incidence of cardiovascular disease in patients with serious mental illness. The aim of the study is to see the prevalence of metabolic syndrome among mentally ill patients and what might be the underlying the cause behind the scene A descriptive, retrospective study was conducted at mental health clinic, Batticaloa, Teaching Hospital (BTH), Sri Lanka. The data were collected over a period of two months from 15th of October to 15th of December 2017. Data were harvested from the medical records. Total 55 mentally ill patient’s medical records were analyzed for this study. Out of 55, females were 30 (54.5%) and males were 25 (45.5%). Furthermore, 30 (54.5%) patients had an evidence of metabolic syndrome. The association of metabolic syndrome among male and female was not statistically significant (P > 0.05). In this study, metabolic syndrome is more prevalent among, patient with trifluoperazine (70%) drug group, risperidone (66.6%) and olanzapine (53.12%).
The integral equations of Compton Scatter Tomography  [PDF]
M. K. Nguyen, T. T. Truong
Open Journal of Applied Sciences (OJAppS) , 2012, DOI: 10.4236/ojapps.2012.24B013
Abstract: Two new Compton Scatter Tomography modalities, which are aimed at imaging hidden structures in bulk matter for industrial non-destructive control (or testing) and for medical diagnostics are shown to be based on the solutions of a special class of Chebyshev integral transforms. Besides their remarkable analytic properties, they can be inverted by existing methods which lend themselves nicely to numerical treatment and provide convergent, stable and fast computation algorithms. The existence of explicit inversion formulas implies that viable new imaging techniques can be developed, which may take over the current ones in a near future.
Working Memory and Reading Development  [PDF]
T. L. Ferreira, C. M. T. Valentin, S. M. Ciasca
Psychology (PSYCH) , 2013, DOI: 10.4236/psych.2013.410A002

Purpose: To evaluate the development of working memory and reading in proficient students from 1st to 4th year of elementary school. Method: Participants were 19 people of both genders, with an average age of 8.26 years, enrolled between the 1st and 4th year of elementary school, who met the proposed inclusion criteria and were proposed and evaluated for working memory and reading level. Results: There’re no significant differences in the level of reading and working memory between genders male and female. The research points to an improved performance of working memory with the increasing age and educational level. The students belonging to the 3rd and 4th year showed better results in the physical assessment of working memory, as well as in the evaluation of the reading level. Conclusion: In this study, it was observed that with the increasing age and schooling, there was an improvement in the performance of working memory, and consequently a better performance in reading. But it cannot be inferred that only the working memory and reading complement themselves bidirectionally, because the literature indicates that other factors also help the development of reading.

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