soil colloid particles influence soil chemical and physical properties by their surface electrical charge. with respect to the importance of this issue from both agricultural and environmental points of view, charging behavior of a kaolinite sample was studied in the ph range of 4 to 10 and at three background electrolyte concentrations, including 0.005, 0.05, 0.5 m nacl, by potentiometric titr...

Superconductivity has recently been discovered in Pr2Ba4Cu7O15−δ with a maximum Tc of about 15K. Since the CuO planes in this material are believed to be insulating, it has been proposed that the superconductivity occurs in the double (or zigzag) CuO chain layer. On phenomenological grounds we propose a theoretical interpretation of the experimental results in terms of a new phase for the zigza...

In this paper we are presenting preliminary results from 4T technology based CMOS image sensors with global shutter, i.e. all pixels in the active array integrate light simultaneously. The global shutter operation mode is particularly important for high-speed video applications, where the more commonly implemented rolling line shutter creates motion blur. Our chips were fabricated using a 0.18 ...

The transient process of the programming and erasing is very important for a nanocrystalfloating-gate flash memory. In this work, a computer simulation was carried out to investigate the charging, retention and erasing processes of our proposed Ge/Si hetero-nanocrystal floating gate flash memory. The transient gate current, the transient drain current and the average charge in one dot were simu...

In the present paper we describe a search for gases that allow to reduce the energy of the electrical discharge produced in Resistive Plate Chambers (RPCs) operated in streamer mode, by reducing both the operating voltage and the released charge. This can be achieved, with current gas mixtures of argon, tetrafluoroethane (TFE) and isobutane, by reducing the total amount of quenching components ...

Acidic proteins and nucleic acids such as RNA are most readily ionized in electrospray ionization (ESI) operated in negative-ion mode. The multiply deprotonated protein or RNA ions can be used as precursors in top- down mass spectrometry. Because the performance of the dissociation method used critically depends on precursor ion negative net charge, it is important that the extent of charging i...

Abstract — A mixed-mode inner-product vector processor is presented. It performs high-dimensional matrix-vector multiplication on a fine-grain analog array and has a purely-digital interface. The array incorporates charge-mode analog computational cells and row-parallel analog-to-digital converters (ADC). Each of the cells includes a dynamic storage element and a charge injection device computi...

We obtain the quasinormal modes for tensor perturbations of Gauss-Bonnet black holes in d = 5, 7, 8 dimension using third order WKB formalism. The black hole in d = 6 is not considered because of the fact that it is unstable to tensor mode perturbations. For the uncharged Gauss-Bonnet black hole the real part of the frequency increases as the GaussBonnet coupling (α) increases. The imaginary pa...

A high-frequency optical phonon mode of SrTiO3 (STO) was found to assist the high-temperature superconductivity observed recently at the interface between monolayer FeSe and STO substrate. However, the origin of this mode is not clear. Through first-principles calculations, we find that there is a novel polar phonon mode on the surface layers of the STO substrate, which does not exist in the ST...

Quasi one–dimensional conductors which undergo a Peierls transition to a charge density wave state at a temperature TP show a region of one–dimensional fluctuations above TP . The Ginzburg–Landau–Langevin theory for the frequency dependent collective conductivity from conductive fluctuations into the charge density wave state is developed. By inclusion of a phase breaking term the effect of loc...