Results 11 to 20 of about 1,099,145 (281)

Rigidity of critical metrics for quadratic curvature functionals

Journal de Mathématiques Pures et Appliquées, 2023
In this paper we prove new rigidity results for complete, possibly non-compact, critical metrics of the quadratic curvature functionals $\mathfrak{F}^{2}_t = \int |\operatorname{Ric}_g|^{2} dV_g + t \int R^{2}_g dV_g$, $t\in\mathbb{R}$, and $\mathfrak{S}^2 = \int R_g^{2} dV_g$. We show that (i) flat surfaces are the only critical points of $\mathfrak{S}
Catino, Giovanni, Mastrolia, Paolo, Monticelli, Dario D.   +2 more
openaire   +2 more sources

Stability and integration over Bergman metrics [PDF]

, 2014
We study partition functions of random Bergman metrics, with the actions defined by a class of geometric functionals known as `stability functions'. We introduce a new stability invariant - the critical value of the coupling constant - defined as the ...
Klevtsov, Semyon, Zelditch, Steve
core   +1 more source

Critical Review of Data, Models and Performance Metrics for Wind and Solar Power Forecast

IEEE Access, 2022
Global climatic changes and increased carbon footprints provided the main impetus for the decrease in the use of fossil fuels for electricity generation and transportation.
V. Prema, M. S. Bhaskar, Dhafer Almakhles, N. Gowtham, K. Uma Rao   +4 more
doaj   +1 more source

CO₂-equivalence metrics for surface albedo change based on the radiative forcing concept: a critical review [PDF]

Atmospheric Chemistry and Physics, 2021
Management of Earth's surface albedo is increasingly viewed as an important climate change mitigation strategy both on (Seneviratne et al., 2018) and off (Field et al., 2018; Kravitz et al., 2018) the land. Assessing the impact of a surface albedo change
R. M. Bright, M. T. Lund
doaj   +1 more source

Early hyperoxia and 28-day mortality in patients on venoarterial ECMO support for refractory cardiogenic shock: a bicenter retrospective propensity score-weighted analysis

Critical Care, 2022
Background The mortality rate for a patient with a refractory cardiogenic shock on venoarterial (VA) extracorporeal membrane oxygenation (ECMO) remains high, and hyperoxia might worsen this prognosis.
Mouhamed Djahoum Moussa, Christophe Beyls, Antoine Lamer, Stefan Roksic, Francis Juthier, Guillaume Leroy, Vincent Petitgand, Natacha Rousse, Christophe Decoene, Céline Dupré, Thierry Caus, Pierre Huette, Mathieu Guilbart, Pierre-Grégoire Guinot, Patricia Besserve, Yazine Mahjoub, Hervé Dupont, Emmanuel Robin, Jonathan Meynier, André Vincentelli, Osama Abou-Arab   +20 more
doaj   +1 more source

Complex Deformation of Critical Kähler Metrics [PDF]

Journal of Mathematical Study, 2017
In this paper, we use Pacard-Xu's methods to discuss the complex deformation of constant scalar curvature metrics in the case of fixed and varying complex structures. Moreover, we also discuss the complex deformation of Kähler Ricci solitons.
openaire   +2 more sources

What is critical global health?

Medicine Anthropology Theory, 2016
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Vincanne Adams
doaj   +1 more source

Evaluating true BCI communication rate through mutual information and language models. [PDF]

, 2013
Brain-computer interface (BCI) systems are a promising means for restoring communication to patients suffering from "locked-in" syndrome. Research to improve system performance primarily focuses on means to overcome the low signal to noise ratio of ...
Arnold, Corey, Pouratian, Nader, Speier, William   +2 more
core   +2 more sources

Critical Robertson-Walker universes [PDF]

, 2019
The integral of the energy density function $\mathfrak m$ of a closed Robertson-Walker (RW) spacetime with source a perfect fluid and cosmological constant $\Lambda$ gives rise to an action functional on the space of scale functions of RW spacetime ...
Eshkobilov, Olimjon, Musso, Emilio, Nicolodi, Lorenzo   +2 more
core   +2 more sources

Power system resilience assessment considering critical infrastructure resilience approaches and government policymaker criteria

IET Generation, Transmission & Distribution, 2021
The electric power system is one of the most important critical infrastructures of a country. Recently, the number of natural and man‐made disasters is increased, which can impose extensive damages and costs to the power system.
Habibollah Raoufi, Vahid Vahidinasab
doaj   +1 more source