PURKH (E-Journals)
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Minimization of Optical Rogue Waves Formation based on Hamiltonian approach
Get PDFIt is well known that Benjamin-Feir instability plays a crucial role in generating underseas rogue waves, for which its formation process can be carried out within a short period of time, but causing devastating threats to our natural habitats. One can attempt to control or stabilize such nonlinear plane waves via self-dissipation, provided that amplitude of such waves is sufficiently low. For rogue waves with higher amplitude, it suffices to observe the stable wave patterns underseas, and makes use of damping techniques to recover its original amplitude into normal amplitudes. Currently, there is a lack of specialized mathematical tools for analyzing underlying physics of these large magnitude nonlinear rogue waves. In this paper, we provide a framework of mathematical model for formation of rogue waves, and demonstrate statistical properties of optical rogue waves through Hamiltonian approach (that is widely used in statistical mechanics field). Next, we formulate new optimization criteria for minimizing its intensity by making use of first-order Riccati differential equation, and outline several important physical factors that we need to control in reality. This opens a new door for mitigating detrimental effects from fiber nonlinearity in optical communications
Finite Difference Approximation for Caputo-Fabrizio Time Fractional Derivative on Non-Uniform Mesh and Some Applications
Get PDFThis study presents the numerical approximation method for the nonsingular fractional derivative known as the Caputo-Fabrizio fractional derivative on uniform and nonuniform mesh. It has been found that the accuracy of the utilized fractional derivative can be improved on nonuniform mesh compare to the uniformone. In contrast to the previous literatures, the accuracy of nonsingular fractional derivative is highly weighted by the fractional order and the memory kernel
Thermodynamics of Dipolar Hard Sphere System
Get PDFThe thermodynamic properties of real physical systems are greatly influenced by the inter particle interactions. Recent experimental progress in trapping and cooling of molecular gases creates great interest in the study of gases with dominant dipole-dipole interactions with electric or magnetic dipole moments. In this paper we use mean field method to find out the non ideal equation of state and thermodynamic properties of a dipolar system
Fractal structure of the positive free-air gravity anomalies within the Balkan Peninsula
Get PDFThe investigations of the fractal structure and properties of the different geophysical elements is new and fast developing area of research among the geophysical society. The fractal properties of the earthquake clusters, faults and folds at different scale, even the plutonic bodies and other elements of the positive landforms are the most exploited areas of research. In our caste the special attention is paid to the gravity field (free-air anomalies) as the most expressive element of the surface elevated structures and their influence to the relief. The Balkan Peninsula is well known as the one of the most variable Earth’s surface elevation area in the world. The fractal properties of gravity field in such area could be useful to try to establish formal relationships to the surface elevation, as well as to prove the possibility to get some information about the self-organization and the origin of the mountain landforms in the same area
Complexation of 1,4-bis (3-(2-pyridyl) pyrazol-1-ylmethyl) benzene (1,4-PPB) with Cu (II), Co (II), and Ni (II):: Spectrophotometric Studies in Mixed Solvent (EtOH-H2O)
Get PDFThe stability and composition of the complexes of 1,4-bis (3-(2-pyridyl) pyrazol-1-ylmethyl) benzene (1,4-PPB) with Cu (II), Co (II), Ni (II): have been investigated using spectrophotometric method in mixed (1:1) solvent of ethanol and water. Various experimental parameters, which include pH, ionic strength, solvent composition, and time, have been studied. The stoichiometry and formation constant of each complex have been evaluated using Job's method. Spectrophotometric results show the formation of 1:1 complexes with stability order of Co > Ni > Cu. Molar absorptivity values of the complexes have also been determined
Rape among Mexican youth and young adults
Get PDFRape disproportionately affects women and men between the ages of 12 and 24. Using data obtained from the National Longitudinal Youth Survey (ENAJUV, 2010), this study aims to present the prevalence and factors associated with rape among these populations. The results indicated that 2.9 percent of sexually initiated youth and young adults between the ages of 12 to 29 reported having been forced to engage in sexual intercourse at least once in their lives. The multivariate analysis indicates that rape among young adults, but particularly among youth is shaped by social inequalities of gender, generation, ethnic-race affiliation (for example) which structure individual-level experiences, cultural representations, rape scripts and state and institutional responses. These findings are discussed within the context of the social construction of accessible gendered bodies and sexuality in the Mexican context, and within the framework of rape supportive culture and normative heterosexuality prevailing in this country
Astroarchaeology research methods
Get PDFAstroarchaeology is one of the most difficult scientific directions in archeoastronomy, because in addition to the time continuum of astronomical situations in the sky in certain historical times, it is necessary to take into account factors of local character – the horizon line, the estimated time of day, the allegedological and religious and religious concepts of the corresponding historical time on the archaeological site. To help the archeologists, there are astronomical programs that astroarchaeology methods, but for the competitive use of them need more astroarcheological courses, perhaps online learning
The Legal System in Relation to International Adoption in Spain: Present and Future
Get PDFInternational adoptions are an increasingly common assumption in a globalized society. The Spanish legal system through the International Adoption Act fully resolves the classical problems of private international law. In addition, a new regulation is planned to develop the more complex aspects such as the accreditation regime of certification entities
A Semi-Analytical Method for The Solution of Linear And Nonlinear Newell-Whitehead-Segel Equations
Get PDFThe aim of this work is to use a semi-analytical method “Reduced Differential Transform Method (RDTM)” for the solution of linear and nonlinear Newell-Whitehead-Segel Equations (NWSE). RDTM does not require linearization, transformation, discretization, perturbation or restrictive assumptions. To determine the performance measure of the RDTM, two illustrative examples were considered. The comparative study of the results obtained via the RDTM was compared with that of the exact solution. Hence, RDTM offers solutions with easily computable components as convergent series and is an alternative approach that overcomes the shortcoming of complex calculations of differential transform method