Graphene offers a unique system to investigate transport of Dirac Fermions at p-n junctions. In a magnetic field, combination of quantum Hall physics and the characteristic transport across p-n junctions leads to a fractionally quantized conductance associated with the mixing of electron-like and hole-like modes and their subsequent partitioning. The mixing and partitioning suggest that a p-n j...

We demonstrate a versatile approach to perform lensless imaging at x-ray wavelength. A special design of a sample holder allows recovery of the low spatial frequency information of the sample from the Patterson map of the measured diffraction. As a result, the phase can be reconstructed from an oversampled x-ray diffraction pattern alone, eliminating the need to resort to a low-resolution image...

We calculate the mode-dependent transmission probability of massless Dirac fermions through an ideal strip of graphene (length L, width W, no impurities or defects) to obtain the conductance and shot noise as a function of Fermi energy. We find that the minimum conductivity of order e2/h at the Dirac point (when the electron and hole excitations are degenerate) is associated with a maximum of t...

596 All Rights Reserved © 2013 IJARECE Abstract — Unlike text, videos are difficult to analyze. For the analysis of videos these videos should be divided into different shots, by determining the shot boundaries[12]. This division of the videos is termed as Video shot-boundary detection (VSBD), which is useful for various different purposes like editing, indexing, mixing, etc[5]. This detection ...

Simulations and experiments are used to study extreme-ultraviolet (EUV) laser drilling of submicrometer holes. The ablation process is studied with a 2D Eulerian hydrodynamic code that includes boundfree absorption processes relevant to the interaction of EUV lasers with a solid material. Good agreement is observed between the simulated and measured ablated depths for on-target irradiances of u...

We present commissioning data for the POLISH instrument obtained on the Hale 5-m telescope. The goal of this high precision polarimeter is to constrain orbital inclination of high mass X-ray binaries and to therefore obtain independent mass estimates for their black hole companions. We have obtained photon shot noise limited precision on standard stars, and we have measured the polarization of ...

We present high angular resolution radio snap-shot observations of seven nearby low-luminosity active galaxies (LLAGN) from the NUclei of GAlaxies (NUGA) survey. The observations were conducted with MERLIN and EVN/VLBI at 18 cm and 6 cm. At all observed angular resolutions and frequencies, we find indications for extended emission in about ∼ 40% of the sources, consistent with the decrease of f...

Wepresent the results of an energy-dependent timing analysis of Ginga data from the black hole candidates GS 112468 and GX 339-4 in their Very High State (VHS). Large variations with energy of the timing properties are seen in both sources. The break frequency of the band-limited noise increases with energy, indicating considerable spectral changes on sub-second timescales. Quasi-periodic oscil...

This article proposes a model for stock prices which incorporates shot-noise effects. This means, that sudden jumps in the stock price are allowed, but their effect may decline as time passes by. Our model is general enough to capture arbitrary effects of this type. Generalizing previous approaches to shot-noise we in particular allow the decay to be stochastic. This model describes an incomple...