Results 81 to 90 of about 167,660 (303)

Subterranean environments contribute to three‐quarters of classified ecosystem services

open access: yesBiological Reviews, EarlyView.
ABSTRACT Beneath the Earth's surface lies a network of interconnected caves, voids, and systems of fissures forming in rocks of sedimentary, igneous, or metamorphic origin. Although largely inaccessible to humans, this hidden realm supports and regulates services critical to ecological health and human well‐being.
Stefano Mammola   +30 more
wiley   +1 more source

Techno-Economic Analysis of Tidal Energy Devices Within the Dinagat Islands in the Philippines

open access: yesChemical Engineering Transactions, 2023
Portions of Surigao del Norte, Southern Leyte Provinces, and Dinagat Islands are pre-identified by the Department of Energy (DOE) as potential deployment sites of tidal energy.
Emmanuel R. Caquilala   +2 more
doaj  

Numerical Research of the Effect of Surface Biomimetic Features on the Efficiency of Tidal Turbine Blades

open access: yesEnergies, 2018
Horizontal-axis axial flow tidal current turbine is regularly used to exploit the kinematic energy in tidal currents. However, the scaling up of tidal current turbine is very difficult.
Wenxian Yang   +2 more
doaj   +1 more source

Resonance locking as the source of rapid tidal migration in the Jupiter and Saturn moon systems [PDF]

open access: yes, 2016
The inner moons of Jupiter and Saturn migrate outwards due to tidal energy dissipation within the planets, the details of which remain poorly understood. We demonstrate that resonance locking between moons and internal oscillation modes of the planet can
Fuller, Jim, Luan, Jing, Quataert, Eliot
core   +2 more sources

Extent, characteristics and policy applications of Key Biodiversity Areas

open access: yesBiological Reviews, EarlyView.
ABSTRACT A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy
Stuart H. M. Butchart   +57 more
wiley   +1 more source

Study on Dynamic Behaviors of Hypoid Gears Under Variable Tidal Current Energy Harvesting Conditions

open access: yesMachines
This study investigates dynamic behaviors of hypoid gear rotor systems under variable tidal current energy harvesting conditions through numerical simulations and experimental validation. The study examines dynamic responses of a hypoid gear rotor system
Dequan Huang   +3 more
doaj   +1 more source

Elucidating the Interplay Between Structure and Electrochemical Behavior in Lignin‐Based Polymer Electrolytes for Potassium Batteries

open access: yesBattery Energy, Volume 4, Issue 2, March 2025.
Three biobased membranes are synthesized by crosslinking oxidized Kraft lignin with poly(ethylene glycol) diglycidyl ether of increasing molecular weights. After incorporation of solvated potassium salts, potassium batteries including these biobased gel polymer electrolytes are able to deliver a maximum specific capacity at 0.05 A g−1 as high as 130 ...
Giuseppe Pascuzzi   +5 more
wiley   +1 more source

Influence of fish scale bionic structure on energy performance of a tidal current turbine

open access: yesInternational Marine Energy Journal
The hydrodynamic performance of the tidal current turbine impeller is crucial for converting energy into electricity as it is considered the core component of the tidal current energy capture device.
XINGYU JIA   +5 more
doaj   +1 more source

Spacetime dynamics of spinning particles - exact electromagnetic analogies

open access: yes, 2016
We compare the rigorous equations describing the motion of spinning test particles in gravitational and electromagnetic fields, and show that if the Mathisson-Pirani spin condition holds then exact gravito-electromagnetic analogies emerge.
A. Barnes   +32 more
core   +1 more source

Virialization of matter overdensities within dark energy subsystems: special cases [PDF]

open access: yes, 2006
The virialization of matter overdensities within dark energy subsystems is considered under the restrictive assumptions (i) spherical-symmetric density profiles, (ii) time-independent quintessence equation of state parameter, w, and (iii) nothing but ...
Caimmi, R.
core   +2 more sources

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