A key issue in climate change is the extent to which there are changes variables that may be consistent with anthropogenically induced change. In this paper an attempt has been made apply two-phase regression model records of long term annual mean surface air temperature over India examine whether any significant trends across country. We find most stations selected for study, show acceleration...

Studies have been made on the phase transition phenomena of an oscillator network model based on a standard Hebb learning rule like the Hopfield model. The relative phase informations—the in-phase and anti-phase, can be embedded in the network. By self-consistent signal-to-noise analysis (SCSNA), it was found that the storage capacity is given by αc = 0.042, which is better than that of Cook’s ...

We use inelastic hard sphere molecular dynamics simulations and laboratory experiments to study patterns in vertically oscillated granular layers. The simulations and experiments reveal that phase bubbles spontaneously nucleate in the patterns when the container acceleration amplitude exceeds a critical value, about 7 g, where the pattern is approximately hexagonal, oscillating at one-fourth th...

This paper uses the supernova data to explore the property of dark energy by some model independent methods. We first Taylor expand the scale factor a(t) and the luminosity distance dL to the fifth order to find out that the deceleration parameter q0 < 0. This result just invokes the Robertson-Walker metric. So the conclusion that the universe is expanding with acceleration is more general. The...

Plasma photocathode wakefield acceleration combines energy gains of tens of GeV m-1 with generation of ultralow emittance electron bunches, and opens a path towards 5D-brightness orders of magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks and advanced light sources. However, an intrinsic by-product of the enormous electric field gradients i...

In the present model, a unified picture of cosmology from early inflation to late acceleration is obtained from f(R)− gravity with nonlinear terms R and R of scalar curvature R. It is discussed that elementary particles and radiation are produced during early inflation. The emitted radiation thermalizes the universe to a very high temperature ∼ 10GeV. The exit of the universe from inflationary ...

This paper deals with an original approach of the Switched Reluctance Machine (SRM) control for the purpose of reducing stator vibrations. Two combined approaches are studied in the aim of reducing the vibratory acceleration generated and thus the acoustic noise. The first one is based on a sinusoidal control of the magnetic phase current and the second one, on an optimal control of piezoelectr...

Near-fault ground motions have caused very much damage in the vicinity of seismic sources during recent earthquakes. It is well known that under specific circumstances, intensive ground shakings near fault ruptures may be characterized by short-duration impulsive motions. This pulse-type motion is generally particular to the forward direction, where the fault rupture propagates towards the site...

Internal combustion (IC) engine is a complex power generating machines and used widely in automotive industry, which the failure rate is high. Carrying out the IC engine fault diagnostic methods have been studied and still a lasting topic for scientists. Crankshaft instantaneous angular acceleration, which evaluated by second derivative of the crankshaft rotation respect to time contains a litt...