This paper proposes a stochastic optimization model for the day-ahead scheduling in power systems, which incorporates the hourly demand response (DR) for managing the variability of renewable energy sources (RES). DR considers physical and operating constraints of the hourly demand for economic and reliability responses. The proposed stochastic day-ahead scheduling algorithm considers random ou...

BACKGROUND In this randomized, double-blind study, the authors compared the effectiveness of a sequential epidural bolus (SEB) technique versus a standard continuous epidural infusion (CEI) technique of local anesthetic delivery. Both techniques used the same hourly dose of local anesthetic. METHODS Sixteen gynecologic patients undergoing abdominal surgery received postoperative epidural anal...

rainfall spatial analysis methods are very helpful since there are not enough rainfall gauge stations and watersheds are scattered in large extent. there are many different methods for estimating average precipitation such as; arithmetic method and thiessen polygon. however, the arrangement and location of data and their correlations are not considered by classic methods. thus, geostatistical t...

Forest evapotranspiration is one of the main components in the regional water budget. A comparison between measured and estimated eddy covariance (EC) data, considering the Katerji–Perrier (KP), Todorovic (TD) and Priestley–Taylor (PT) actual evapotranspiration methods, was carried out. These models, relying on more easily obtainable data, are valuable when long-term direct measurements are not...

A simplified mathematical model of parabolic-trough solar thermal power plants, which allow one to carry out an energetic characterization the main parameters that influence field performance, was evaluated through a comparison simulation results. Two geographical locations were selected evaluate proposed in this work—one each hemisphere—and design considerations according with practical/operat...

BACKGROUND Alcohol use is a major and unpredictable driver of emergency department (ED) visits. Regional Twitter activity correlates ecologically with behavioral outcomes. No such correlation has been established in real time. OBJECTIVES The objective was to examine the correlation between real-time, alcohol-related tweets and alcohol-related ED visits. METHODS We developed and piloted a se...

OBJECTIVES To examine the effect of staffing level on time observed in bed during the daytime in nursing home (NH) residents. DESIGN Descriptive, cross-sectional study. SETTING Thirty-four southern California NHs. PARTICIPANTS A total of 882 NH residents: 837 had hourly observation data, 777 had mealtime observations, 837 completed interviews, and 817 completed a physical performance test...

The scale-invariant behavior of air pollutant concentration (APC) time structure was investigated by applying the box counting method to APC time series. One-year series of hourly average APC observations, including O3, CO, SO2, NO, NO2, and PM10 which were obtained from urban, traffic, and national park air monitoring station at Taipei (Taiwan), were transferred into a useful compact form thro...