Results 41 to 50 of about 2,926,685 (388)
IMA Journal of Numerical Analysis, 2004 We discuss the problems arising when computing eigenvalues of self-adjoint operators which lie in a gap between two parts of the essential spectrum. Spectral pollution, i.e. the apparent existence of eigenvalues in numerical computations, when no such eigenvalues actually exist, is commonplace in problems arising in applied mathematics.
Davies, E B, Plum, M
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SSRN Electronic Journal, 2015 This paper estimates the causal impact of party affiliation (Republican or Democrat) of U.S. governors on pollution. Using a regression discontinuity design, gubernatorial election data, and air quality data from U.S. Environmental Protection Agency (EPA), we find that pollution is lower under Democratic governors.
Louis-Philippe Beland, Vincent Boucher
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Petroleum Science, 2017 Novel Mn–Fe–Mg- and Mn–Fe–Ce-loaded alumina (Mn–Fe–Mg/Al2O3 and Mn–Fe–Ce/Al2O3) were developed to catalytically ozonate reverse osmosis concentrates generated from petroleum refinery wastewaters (PRW-ROC).
Yu Chen +7 more
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Emission Characteristics of Hazardous Air Pollutants from Construction Equipment
Aerosol and Air Quality Research, 2020 The emission characteristics of mobile air pollution sources belonging to the non-road sector have yet to be thoroughly investigated, especially when compared to those of on-road vehicles.
Sungwoon Jung +9 more
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Journal of the Egyptian Public Health Association, 2021 Background Human bocavirus (HBoV) is globally distributed and associated with respiratory and enteric infections. Limited data are available about the incidence of HBoV in Egyptian children.
Neveen M. Rizk +5 more
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, 2013 The most common decay used for measuring 2beta_s, the phase of Bs-Bsbar mixing, is Bs -> J/psi phi. This decay is dominated by the colour-suppressed tree diagram, but there are other contributions due to gluonic and electroweak penguin diagrams.
ALAKABHA DATTA +4 more
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Journal of Chemistry, 2023 The exploration of transforming various metals as metal sources into metal organic frameworks (MOFs) has attracted considerable attention in recent years. This study used triethylamine and 5,6-dimethylbenzimidazole (DMBIM) to modify the iron-doped cobalt
Hao Fu +6 more
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Evaluation and analysis of noise levels in Ilorin metropolis, Nigeria [PDF]
, 2010 Evaluation and analysis of noise pollution levels have been carried out to determine the level of noise and its sources in Ilorin metropolis. Noise measurements have been done in the morning, at noon, in the evening, and at night to determine noise ...
Oyedepo, Sunday Olayinka
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Frontiers in Microbiology, 2022 HA, as one of low-carbon pre-treatment technology could be enhanced by packing of iron or iron oxide powder for enhancing the transformation of large molecular weight to generate volatile fatty acids (VFAs) for fuel production.
Yanqiong Wang +4 more
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A triple increase in global river basins with water scarcity due to future pollution
Nature CommunicationsWater security is at stake today. While climate changes influence water availability, urbanization and agricultural activities have led to increasing water demand as well as pollution, limiting safe water use.
Mengru Wang +9 more
semanticscholar +1 more source