The possible time variation of the fundamental constants nature has been an active subject research in modern physics. In this paper, we propose a new method to investigate such speed light $c$ using updated Hubble diagram high-redshift standard candles including Type Ia Supernovae (SNe Ia) and quasars (based on UV-X relation). Our findings show that SNe Pantheon sample, combined with currently...

This paper describes the calculation and simulation results of the Doppler effect on a mobile car with the help of constellation diagram for 8 PSK modulation when the mobile car experienced the Rayleigh fading. Here LMS Linear equalizer is used to optimize the Doppler effect when the mobile Car having speed 30 m/sec and the mobile car is assumed on freeway. The results are taken at three positi...

MIXING ENHANCEMENT BY DUAL SPEED ROTATING STIRRER by Arnaud Goullet Stirring is a well-known means of fluid mixing due to the emergence of complex patterns in the flow, even at low Reynolds numbers. In this work, we consider a stirrer rotating along a circular trajectory at constant speed. The fluid flow, considered incompressible, inviscid and two dimensional (in a circular container), is mode...

The graph-as-picture misconception (GAPm) is a commonly reported error, but basic questions about its prevalence and degree have not been addressed. An interactive educational diagrammatic system was designed to assess and to help students overcome GAPm. Three activities were administered to students (N=48) using touch screen technology: a diagram/picture decision task, a multiple choice questi...

We are given a transportation line where displacements happen at a bigger speed than in the rest of the plane. A shortest time path is a path between two points which takes less than or equal time to any other. We consider the time to follow a shortest time path to be the time distance between the two points. In this paper, we give a simple algorithm for computing the Time Voronoi Diagram, that...

This paper constructs a continuous dual-channel closed-loop supply chain (DCLSC) model with delayed decision under government intervention. The existence conditions of the local stability of the equilibrium point are discussed. We analyze the influence of delay parameters, the adjustment speed of wholesale price, recovery rate of waste products, direct price, carbon quota subsidy, and carbon ta...

Micro-Aerial Vehicles (MAVs) have the advantage of moving freely in 3D space. However, creating compact and sparse map representations that can be efficiently used for planning for such robots is still an open problem. In this paper, we take maps built from noisy sensor data and construct a sparse graph containing topological information that can be used for 3D planning. We use a Euclidean Sign...

The need for high speed communications networks has led the research communities and industry to develop reliable, scalable transatlantic and transpacific fiber-optic communication links. In this paper the optimum Golomb ruler based 2D OCDMA codes has been demonstrated. An OCDMA system based on the discussed 2D codes is designed and simulated on Optisystem. The encoder and decoder structure of ...

Gas bearings have been widely applied to high-speed rotating machines due their low friction and high rotational speed advantages. Nevertheless, gas lubrication is viscosity compressible. It causes the bearing-rotor system easy produce self-excited vibration, which leads instability of rotor hinders increase speed. necessary study nonlinear behaviors aerostatic vibration system, especially cons...