We introduce a scheme to obtain the deconvolved density of states (DOS) of the tip and sample, from scanning tunneling spectra determined in the constant-current mode (z-V spectroscopy). The scheme is based on the validity of the Wentzel-Kramers-Brillouin (WKB) approximation and the trapezoidal approximation of the electron potential within the tunneling barrier. In a numerical treatment of z-V...

This paper describes an MOS current-mode sample-and-hold (S/H) circuit that potentially operates with a sub-1.5 V supply voltage, 20 MHz clock frequency, and less than 0.1% linearity. A newly developed voltage-to-current converter suppresses the voltage change at an input terminal and achieves low-voltage operation with superior linearity. Sample switches are differentially placed at the inputs...

current age of the offender, age of first conviction, prior criminal history, and prior arrest history (Nochajski & Stasiewicz, 2006). Males are more likely than females to receive a subsequent DUI charge (C’de Baca et al., 2001; De Michele & Lowe, 2011; Nochajski & Stasiewicz, 2006) and are mainly between 30 and 40 years old (Beck et al., 1999; C’de Baca et al., 2001; Stasiewicz et al., 2007; ...

A current mode sample and hold circuit is presented in this paper at 180nm technology. The major concerns of VLSI are area, power, delay and speed. Hence, we have used a MOSFET in triode region in the proposed architecture for voltage to current conversion instead of a resistor being used in previously proposed circuit. The proposed circuit achieves high sampling frequency and with more accurac...

A numerical study is made of current distribution in small Hall bars with disorder. It is observed , in particular, that in the Hall-plateau regime the Hall current tends to concentrate near the sample edges while it diminishes on average in the sample interior as a consequence of localization. Also reported is another numerical experiment on a related, but rather independent topic, the breakdo...

The strontium ion, in water-soluble forms, is one of the major pollutant in drinking water. Therefore, a simple, rapid, selective, and sensitive potentiometric carbon paste electrode was developed to measure strontium ion in real samples with complex matrices. To prepare the potentiometric sensor, a synthetic ligand ((E)-4-(((2-amino-4-chlorophenyl)imino)methyl)-5-(hydroxymethyl)-2-methyl pyrid...