The time-between-event (TBE) charts are used to monitor the failure rate λ by examining the time interval T between events. This article proposes a two-sided CUSUM chart (the balanced two-sided CUSUM chart) for detecting both increasing and decreasing shifts in λ. The performance studies show...

We focus on the impact of migrants' remittances on consumption patterns in China. Using a large homogenous sample of rural households surveyed in 2001 and 2004, we find that remittances are spent on nonhousing consumption expenditures at the margin, virtually dollar-for-dollar, when we...

First-principles calculations based on density functional theory were used to study the high-pressure phases of both ZnF<Subscript>2</Subscript> and CdF<Subscript>2</Subscript>. We found that the sequence of the pressure-induced phase transitions is: Rutile (P4<Subscript>2</Subscript>/mnm) ↦ CaCl<Subscript>2</Subscript> (Pnnm) ↦ PdF<Subscript>2</Subscript> (Pa-3) and CaF<Subscript>2</Subscript> (Fm3m) ↦ PbCl<Subscript>2</Subscript> (Pnma) ↦...</subscript></subscript></subscript></subscript></subscript></subscript></subscript></subscript>

We study the transport properties of model networks such as scale-free and Erdös-Rényi networks as well as a real network. We consider few possibilities for the trnasport problem. We start by studying the conductance G between two arbitrarily chosen nodes where each link has the same unit...

Wetlands in irrigated agricultural areas have great environmental benefits as agricultural pollution sinks; but agricultural development and water resources redistribution have caused these wetlands to diminish rapidly worldwide. This is the case in the YinNan Irrigation District (YNID) in the...