The investigation of Scharzschild solution using new one transform leads to the spherical solution of light path. Spherical solution forms space-time wormhole with finite throat. It was shown that wormhole throat diameter could by manipulated by changing value of Schwarzschild radius. Using symmetric formulation of Maxwell’s equations one can obtain the physical time negative solution. Detailed...

For travelling waves with nonzero boundary conditions, we justify the logarithmic Korteweg– de Vries equation as the leading approximation of the Fermi-Pasta-Ulam lattice with Hertzian nonlinear potential in the limit of small anharmonicity. We prove control of the approximation error for the travelling solutions satisfying differential advance-delay equations, as well as control of the approxi...

Consider the following broadcasting process run on a connected graph G=(V,E). Suppose that k≥2 agents start vertices selected from V uniformly and independently at random. One of has message she wants to communicate other agents. All perform independent random walks G, with being passed when an agent knows meets does not know message. The time ξ(G,k) is it takes spread all Our ultimate goal gai...

Introduction: Among the United Arab Emirates (UAE) population more and more people now consider travelling abroad. This is potentially problematic because travelling enhances exposure between hosts and pathogens and so people that travel are putting their health at risk. This concern makes it necessary that public education is provided to inform people of the risks of travellin...

Abstract There is a tension between Dispositionalism––the view that all metaphysical modality grounded in actual irreducible dispositional properties––and the possibility of time travel. This due to fact Dispositionalism makes it much harder solve potentiality-based version grandfather paradox. We first present paradox, stating following theses are inconsistent: 1) travel possible, 2) powers fu...

Klein-Gordon chains are one-dimensional lattices of nonlinear oscillators in an anharmonic on-site potential, linearly coupled with their first neighbours. In this paper, we study the existence in such networks of spatially localized solutions, which appear time periodic in a referential in translation at constant velocity. These solutions are called travelling breathers. In the case of travell...

The travelling salesman problem is to find a shortest path from the travelling salesman’s hometown, make the round of all the towns in the set, and finally go back home. This paper investigates the travelling salesman problem with fuzzy random travelling time. Three concepts are proposed: expected shortest path, (α, β)-path and chance shortest path according to different optimal desire. Corresp...

BACKGROUND The accessibility to health centers is a limitation to the use of preventive and curative health centers. AIM To assess geographic accessibility using a parameter that integrates information about the use of preventive services and travelling time from home to the health center. MATERIAL AND METHODS We analyzed target geographical areas of 10 community centers located at the Nort...