Results 51 to 60 of about 5,160 (221)
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.ABSTRACT Freshwater habitats are globally threatened by various anthropogenic pressures, resulting in reduced habitat quality and diminished biodiversity. Due to their sensitivity to environmental change, mayflies are commonly used in biomonitoring programs worldwide.
Marina Vilenica +8 more
wiley +1 more source
Effects of sediment erosion in guide vanes of Francis turbines [PDF]
, 2016 Erosive wear of turbine components has been a major operational challenge for the runoff-river hydropower plants across the basins of Himalaya in Asia.
Thapa, Biraj Singh
core +1 more source
High resolution data reveal fundamental steps and turns in animal movements
Ecological Monographs, Volume 96, Issue 2, May 2026.Abstract Animal movement paths display substantial complexity and variability, promoting efforts to identify universal rules and models that best describe them. Using high‐resolution (≥10 Hz) movement from 43 vertebrate species spanning diverse taxa, body sizes, and lifestyles, we show that paths are universally composed of straight‐line steps ...
Richard M. Gunner +68 more
wiley +1 more source
The physics of H-Darrieus turbine starting behavior [PDF]
, 2014 This paper provides a resolution to the contradictory accounts of whether or not the Darrieus turbine can self-start. The paper builds on previous work proposing an analogy between the aerofoil in Darrieus motion and flapping-wing flow mechanisms.
Grant L. Ingram +7 more
core +1 more source
Advances in Mechanical EngineeringBased on the velocity similarity theory, a test system for sediment wear flow around Francis turbine runner blades was established. The sediment wear test was carried out on the surface of Francis turbine runner blades with severe sediment wear before ...
Bing Yao +6 more
doaj +1 more source
Energy Technology, Volume 14, Issue 4, April 2026.This article provides a comprehensive review of loss mechanisms in the generation stage of energy systems, covering fossil, nuclear, and renewable technologies. It examines their environmental and operational implications and shows how overlooking generation losses distorts efficiency assessments.
Pooya Parvizi +4 more
wiley +1 more source
Advances in Mechanical EngineeringThe Francis turbine stability is impacted significantly by the flow characteristics in its draft tube. In the case of a Francis turbine in a hydropower plant, numerical simulations were undertaken at the maximum and rated heads, respectively, under three
Yuanhang Hou +7 more
doaj +1 more source
Flow Modeling in the Wake of a Francis Turbine with Hydraulic Charge: Case of Songloulou-Cameroon [PDF]
Journal of Applied Fluid MechanicsCavitation in hydraulic installations is still a major concern when it comes to producing electricity. We are aware of the danger of cavitation and the damage it can cause.
R. D. Wafo +4 more
doaj +1 more source
Oikos, Volume 2026, Issue 4, April 2026.Plasticity of diel activity rhythms may be a key element for adaptations of wildlife populations to changing environmental conditions. In the last decades, grizzly bears Ursus arctos in the Greater Yellowstone Ecosystem (GYE) have experienced notable environmental fluctuations, including changes in availability of food sources and severe droughts ...
Aurora Donatelli +4 more
wiley +1 more source
Advances in Mechanical Engineering, 2015 As the key component of a hydroelectric power generation system, hydraulic turbine plays a decisive role in the overall performance of the system. There are many sandy rivers in the world, and turbines working in these rivers are seriously damaged ...
Hua Hong +5 more
doaj +1 more source