This paper illustrates notions of volatility associated with power systems spot prices for electricity. The paper demonstrates a frequency-domain method useful to separate out periodic price variations from random variations. It then uses actual observed price data to estimate parameters such as volatility and the coefficient of mean reversion associated with the random variation of prices. It ...

In recent decades, due to increasing prices of fossil fuels and environmental pollution resulting from the increased energy demand, researches on renewable energy sources have attracted lots of researcher’s attention. Limited investing sources and environmental issues are important factors effecting electricity generation sector. Minimizing costs and environmental damages are issues being consi...

ADVERTISEMENT RETURN TO ISSUEEditorialNEXTPutting the World Back Together and Announcing 2021 ACS Nano Award Lecture LaureatesHolly BunjeHolly BunjeMore by Holly Bunjehttps://orcid.org/0000-0002-3085-9890, Yan LiYan LiMore Lihttps://orcid.org/0000-0002-3828-8340, Luis M. Liz-MarzánLuis Liz-MarzánMore Liz-Marzánhttps://orcid.org/0000-0002-6647-1353, Jill E. MillstoneJill MillstoneMore Millstoneh...

There is debate regarding the correlation between in vitro susceptibility testing and clinical response to therapy for Bacteroides bacteremia. We conducted a prospective multicenter observational study of 128 patients with bacteroides bacteremia. Outcome was correlated with results of in vitro susceptibility testing of Bacteroides isolates recovered from blood and/or nonblood sites, determined ...

Advances in technology and operator experience, and increased use of angiography early after myocardial infarction have led to greater use of percutaneous transluminal coronary angioplasty (PTCA) for chronic, total coronary artery occlusions. To better assess long-term outcome, 257 consecutive patients with successful PTCA of a total occlusion with late angiographic follow-up from 464 patients ...

Percutaneous cardiopulmonary bypass (PCB) was hmtttuted in 30 initially stable patients who developed either ctadiac arrest refractory to resuscitatton (n = 7) or cardiogenic shock (mean arts rial biood pressure cB0 mm Hg unresponsive to fluid resuscttation or vv) (n = 23) after a cation laboratory complication. Events leadhrg to collapse included abrupt closure during pe muaneous transkrminal ...