Using a three-dimensional classical ensemble method, we investigated the nonsequential double ionization (NSDI) of xenon atoms from near infrared to mid-infrared in spatially inhomogeneous laser fields, and compared with results homogeneous fields. The show that NSDI probability curves are similar between field at short wavelength. With wavelength increasing, high intensities is more suppressed...

WheelFS is a wide-area distributed storage system intended to help multi-site applications share data and gain fault tolerance. WheelFS takes the form of a distributed file system with a familiar POSIX interface. Its design allows applications to adjust the tradeoff between prompt visibility of updates from other sites and the ability for sites to operate independently despite failures and long...

Spatial Data Infrastructures (SDIs) have been identified essential for environmental management and development activities around the world. Meanwhile, development of frameworks to monitor and evaluate SDIs is currently an important research area. This study proposes Balanced Scorecard (BSC) as a framework for evaluation and monitoring the implementation of SDIs. The concept and advantages of B...

Botswana recently embarked on an effort to improve its National Spatial Data Infrastructure (NSDI). This paper takes an example of the country’s effort to improve information for land administration and the problems this effort has had because of a poor spatial data infrastructure. It then discussed how the current effort is likely to have impact on the organization of information for land mana...

Based on the full quantal recollision model and field-free electron impact ionization theory, we calculate the correlated momentum spectra of the two outgoing electrons in strong field nonsequential double ionization (NSDI) of helium to compare with recent experiments. By analyzing the relative strength of binary versus recoil collisions exhibited in the photoelectron spectra, we confirm that t...