We present a simple theoretical model for the diffusion of free carriers in layered semiconducting compounds, for which a small concentration of dopants (guest layers) disturb the system conductance, resulting in a strong anisotropy across and along the layers, which depends on the temperature of the system, as well as on the barrier lowering caused by the applied voltage. This model is based o...

The characteristics of host-guest systems, such as molecular recognition, complexation, encapsulation, guest composition, and dynamic exchange, are manifested by changes in the chemical shifts (Δω) in the NMR spectrum. However, in cases where NMR signals cannot be detected, due to low concentrations, poor solubility, or relatively fast exchange, an alternative is needed. Here, we show that by u...

When attackers have compromised a system and have some certain control over the victim system, retaining that control and avoiding detection becomes their top priority. To achieve this goal, various rootkits have been proposed. However, existing rootkits are still detectable as long as defenders can gain control at a lower-level, such as the operating system level or the hypervisor level, or th...

The characteristics of host–guest systems, such as molecular recognition, complexation, encapsulation, guest composition, and dynamic exchange, are manifested by changes in the chemical shifts (Du) in the NMR spectrum. However, in cases where NMR signals cannot be detected, due to low concentrations, poor solubility, or relatively fast exchange, an alternative is needed. Here, we show that by u...

A new unsymmetric guest compound comprising ferrocene and azobenzene moieties was synthesized and can form a host-guest system with beta-cyclodextrin (beta-CD) complexed. The complexation stoichiometries and sites of the ensembles can be selectively controlled by reversible redox and photoirradiation.

There is a huge semantic gap between file system and storage in servicing an I/O request. In a virtual environment the gap increases even more, as the hypervisor’s I/O scheduler is not aware of the semantics of the I/O request that the application issues. To address this limitation and to retain the semantics of the I/O requests in a virtualized environment, we tag each I/O request from the gue...