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Statistical Characterization of Solar Photovoltaic Power Variability at Small Timescales: Preprint
Integrating large amounts of variable and uncertain solar photovoltaic power into the electricity grid is a growing concern for power system operators in a number of different regions. Power system operators typically accommodate variability, whether from load, wind, or solar, by carrying reserves that can quickly change their output to match the changes in the solar resource. At timescales in the seconds-to-minutes range, this is known as regulation reserve. Previous studies have shown that increasing the geographic diversity of solar resources can reduce the short term-variability of the power output. As the price of solar has decreased, the emergence of very large PV plants (greater than 10 MW) has become more common. These plants present an interesting case because they are large enough to exhibit some spatial smoothing by themselves. This work examines the variability of solar PV output among different arrays in a large ({approx}50 MW) PV plant in the western United States, including the correlation in power output changes between different arrays, as well as the aggregated plant output, at timescales ranging from one second to five minutes
Modeling mesothelioma risk factors from amphibole fiber dimensionality: mineralogical and epidemiological perspective
“Your Pants Won’t Save You”
The politics of “Black Respectability” foreground Black citizens’ individual and collective responsibility to prioritize self-policing, polish, and propriety. Proponents believe that the steady performance of restraint and decorum is critical and that any departure from that repertoire can result in punishment. The belief that racially minoritized youth must earn respect and autonomy, rather than see those rights protected as a standard afforded to all community members, may not be widely held by younger Black people. The following study makes use of interview data collected from 23 Black Baltimore City millennials who shared their perspectives on the social and political contexts that led to Freddie Gray’s death while in Baltimore Police custody. When discussing police officers’ pursuit of citizens who match Freddie Gray’s outward appearance, younger respondents resisted the demands of Black Respectability Politics and, instead, asserted their right to pass through their neighborhoods absent state-sanctioned harassment. This study features an exploration of how generational membership moderates legal socialization, attitudes about personal responsibility for police profiling, and beliefs about the right to the same full spectrum of freedoms and protections enjoyed by majority citizens. Implications for critical race theory, legal cynicism, and intergenerational coalition building are also discussed
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