BACKGROUND Although intrinsic risk factors contributing to esophageal food impaction are well established, whether social behavior affects its occurrence has not yet been examined. METHODS We conducted a retrospective review of the gastroenterology endoscopy procedural documentation software for the period of 2001-2012 to identify all patients who presented to our emergency department for eso...

In this paper, next-day hourly forecasts are calculated for the energy price in the electricity production market of Spain. The methodology used to achieve these forecasts is based on artificial neural networks, which have been used successfully in recent years in many forecasting applications. The days to be forecast include working days as well as weekends and holidays, due to the fact that e...

The accuracy of forecasting of electrical load for the electricity industry has a vital significance in the renewal of economic structure as well as various equations including: purchasing and producing energy, load fluctuation, and the development of infrastructures. Its short-term forecasting has a significant role in designing and utilizing power systems and in the distribution systems and h...

Sales tax holidays (STHs) are the temporary suspension of state (and some local) sales taxes on selected retail items for a brief period of time. The policy has gained popularity in recent years, beginning in one state in 1997and growing to twenty by 2008. Despite the increased frequency with which states use STHs, little research has been conducted to study how households respond to this tempo...