Doppler images of the cool spot distribution on the RS CVn-type star HD 106225 are presented. These images, for Epoch 1995.14, were derived using four photospheric lines. The spot distribution is characterized by a large (radius = 20◦) spot at latitude 45◦ and a weak polar spot with an appendage. The polar spot is considerably smaller than similar features found on other RS CVn stars. The rotat...

Flash memory is a leading storage media with excellent features such as random access and high storage density. However, it also faces significant reliability and endurance challenges. In flash memory, the charge level in the cells can be easily increased, but removing charge requires an expensive erasure operation. In this thesis we study rewriting schemes that enable the data stored in a set ...

The relationship between polar geomagnetic variations and the polarity of the interplanetary magnetic sectors' has been studied for the quiet year 1965. It is found that during the day hours a system of ionospheric currents encircles the magnetic poles on every day. The current system may extend up to 15 ø from the pole but is strongest at 8ø-10 ø invariant colatitude. The current direction as ...

Time-resolved observations of a 6′ x 6′ field, containing the position error boxes of the X-ray source 1WGA J1958.2+3232, were performed in June 1999 with the 91 cm Catania telescope, equipped with a Photon Counting Intensified CCD. The star recently proposed as the optical counterpart of the 1WGA J1958.2+3232, exhibited a strong optical modulation with a period compatible with that seen in X-r...

<span lang="EN-US">The automatic modulation classification (AMC) plays an important and necessary role in the truncated wireless signal, which is used modern communications. The proposed convolution neural network (CNN) for AMC based on a method of feature expansion by integrating I/Q (time form) with r/Ɵ (polar order to take advantage two things: first, helps increase features; second th...

The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520 antiprotons were detected in the energy range 0.1–4.2 GeV. In this paper, we report the antiproton spectrum obtained, discuss the origin of cosmic-ray antiprotons, and use antiproton data to probe the eff...

2014 A new series of polar mesogens exhibits both a smectic B phase and a ribbon phase Sc. In this series, an incommensurate hexatic B phase has also been found. In this phase, a long wavelength modulation of the dipolar orientation is superimposed over the in-layer 2D hexagonal array. The structural features of this new phase are compared to those of the normal hexatic B and Sc phases. J. Phys...

As important third-generation semiconductors, wurtzite III nitrides have strong spontaneous and piezoelectric polarization effects. They can be used to construct multifunctional polar heterojunctions or quantum structures with other emerging two-dimensional (2D) semiconductors. Here, we investigate the effect of GaN on interfacial charge transfer electronic properties GaN/MoS2 by first-principl...