Results 11 to 20 of about 1,077,898 (187)

Some rigidity results on critical metrics for quadratic functionals [PDF]

open access: yes, 2014
In this paper we prove rigidity results on critical metrics for quadratic curvature functionals, involving the Ricci and the scalar curvature, on the space of Riemannian metrics with unit volume. It is well-known that Einstein metrics are always critical
Catino, Giovanni
core   +2 more sources

What is critical global health?

open access: yesMedicine Anthropology Theory, 2016
n ...
Vincanne Adams
doaj   +1 more source

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

open access: yesIET 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

Measuring Resilience in Smart Infrastructures: A Comprehensive Review of Metrics and Methods

open access: yesApplied Sciences, 2023
In today’s world, the safety, economic prosperity, and social well-being of nations depend heavily on highly interconnected critical infrastructures.
Abdulaziz Almaleh
doaj   +1 more source

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

open access: yes, 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   +2 more
core   +2 more sources

Solar Performance Metrics in Urban Planning: A Review and Taxonomy

open access: yesBuildings, 2022
Metrics are instrumental in design assessments. Solar performance metrics help designers to evaluate solar access in cities. Metrics should be used early in the urban planning stages in order to enable sustainable urban development with greater access to
Agnieszka Czachura   +3 more
doaj   +1 more source

Critical Robertson-Walker universes [PDF]

open access: yes, 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   +2 more
core   +2 more sources

Rigidity of critical metrics for quadratic curvature functionals

open access: yesJournal 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   +2 more
openaire   +2 more sources

ABOVEGROUND BIOMASS ESTIMATION USING RECONSTRUCTED FEATURE OF AIRBORNE DISCRETE-RETURN LIDAR BY AUTO-ENCODER NEURAL NETWORK [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Aboveground biomass (AGB) estimation is critical for quantifying carbon stocks and essential for evaluating carbon cycle. In recent years, airborne LiDAR shows its great ability for highly-precision AGB estimation.
T. Li, Z. Wang, J. Peng
doaj   +1 more source

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