We have studied dissociative H2 adsorption on the H/Si~100! surface by means of pseudopotential density functional theory calculations. This work is directly motivated by the observations of Biederman et al. @Phys. Rev. Lett., 83, 1810 ~1999!#: ‘‘H2 adsorption is significantly promoted in an interdimer configuration of two adjacent singly occupied dimers.’’ We find that there is no adsorption b...

This study compared the simulated workplace protection factors (SWPFs) between NIOSH-approved N95 respirators and P100 respirators, including two models of filtering facepiece respirator (FFR) and two models of elastomeric halfmask respirator (EHR),against sodium chloride particles (NaCl) in a range of 10 to 400 nm. Twenty-five human test subjects performed modified OSHA fit test exercises in a...

We have used P element deletion derivatives at defined locations in the Drosophila genome to construct a 100-kb extended P element more than twice the size of any previously available. We demonstrate that this prototypical extended P element is capable of transposition to new sites in the genome. The structural and functional integrity of a transposed extended P element was confirmed using mole...

This study examines the performance of the S&P 100 implied volatility as a forecast of future stock market volatility. The results indicate that the implied volatility is an upward biased forecast, but also that it contains relevant information regarding future volatility. The implied volatility dominates the historical volatility rate in terms of ex ante forecasting power, and its forecast err...

Temperature-independent magnetic viscosity in ferritin has been observed from ∼ 2 K down to 100 mK, proving that quantum tunneling plays the main role in these particles at low temperature. Magnetic relaxation has also been studied using the Landau-Zener method making the system crossing zero resonant field at different rates, α = dH/dt, ranging from 10 −5 to 10 −3 T/s, and at different tempera...

Employment of the <100> channel direction in a strained-Si0.8Ge0.2 p-MOSFET provides a hole mobility enhancement as large as 25% and a parasitic resistance reduction of 20% compared to a <110> strained-Si0.8Ge0.2 channel p-MOSFET, which already has a better mobility and threshold voltage roll-off than the Si p-MOSFET. These results suggest that the <100> strained-SiGe-channel p-MOSFET can be us...

Visible electroluminescence ~EL! is observed at room temperature by current injection into Eu:CaF2 layers containing 7.5 and 8.0 at. % Eu grown by molecular beam epitaxy on lightly doped ~100! p-type silicon. The EL spectra are broad with peaks near 700 and 600 nm, respectively. Room temperature photoluminescence spectra for the same samples exhibited peaks near 420 nm, with higher doped sample...

The implied volatility, calculated using the Black-Scholes model, is currently the most popular method of estimating volatility and is considered by traders to be a significant factor in signalling price movements in the underlying market. Thus, the ability to develop accurate forecasts of future volatility allows a trader to establish the proper strategic position in anticipation of changes in...

The continuum cross sections and analyzing powers from the H, ' He( p, p') and ' He( p, d') reactions were measured for 98.7 and 149.3 MeV polarized protons in the angular range 17.5 to 60'. The H and 'He data show strong quasifree contributions with more ambiguous results for He. These data are compared with distorted-wave impulse approximation calculations based on quasifree nucleon and deute...