Results 61 to 70 of about 32,495 (296)
Predators and scavengers: Polar bears as marine carrion providers
Oikos, EarlyView.Scavenging is a foraging strategy widely used across the animal kingdom and apex predators provide a large amount of energy in a food web by provisioning carrion. In the harsh environmental conditions of the Arctic, apex predators such as polar bears Ursus maritimus can provide scavenging opportunities for many species. Carrion can act as a buffer when
Holly E. L. Gamblin +5 more
wiley +1 more source
A Theoretical and Experimental Study of Moderate Temperature Alfa Type Stirling Engines
Energies, 2020 The Stirling engine is a device that allows conversion of thermal energy into mechanical energy with relatively high efficiency. Existing commercial designs are mainly based on the usage of high temperature heat sources, whose availability from renewable
Jacek Kropiwnicki, Mariusz Furmanek
doaj +1 more source
People and Nature, EarlyView.Abstract Conservation performance payments are becoming an increasingly popular instrument to tackle human–wildlife conflicts. In Sweden, Sámi communities practicing reindeer husbandry receive performance payments as compensation for reindeer losses caused by lynxes and wolverines.
Josef Kaiser +3 more
wiley +1 more source
Numerical thermodynamic model of alpha-type Stirling engine
Case Studies in Thermal Engineering, 2018 The objective of this study is to develop accurate practical thermodynamic model for alpha-type Stirling engine with Ross Yoke mechanism. Thermal, pumping, and regeneration loses are considered in developing the thermodynamic model.
Khaled M. Bataineh
doaj +1 more source
Efficient Large‐Area Graphene p‐n Junction Terahertz Receivers on an Integrated Optical Platform
Small Methods, EarlyView.An antenna‐integrated graphene Salisbury screen (AgSS) p‐n junction is engineered to detect radiation at 2.8 THz with room‐temperature noise equivalent powers < 300 pWHz−1/2, response time < 5 ns and a power dynamic range larger than four orders of magnitude.
Leonardo Viti +4 more
wiley +1 more source
Optimization analysis of solar-powered average temperature Stirling heat engine
Journal of Energy in Southern Africa, 2017 This paper investigates the performance of the solar powered dish-Stirling engine using the nonlinearized heat loss model of the solar dish collector and the irreversible cycle model of the Stirling engine.
Khaled M. Bataineh
doaj +1 more source
The Political Quarterly, EarlyView.Abstract In the UK, the new Labour government has linked the intention to deliver more homes to reform of the planning system, which is seen as a key barrier. Two assumptions inform this reform. First, the system is sound, but there are problems with its administration.
Nancy Holman, Alan Mace
wiley +1 more source
Journal of Thermal Science and TechnologyIn recent years, industrial boilers that generate power from biomass have drawn a lot of attention. Nevertheless, a sizable portion of thermal energy is frequently lost to the environment as flue gas throughout the process.
Nik Kechik Mujahidah NIK ABDUL RAHMAN +5 more
doaj +1 more source
Performance Analysis of Stirling Engine Type Alpha Using Thermodynamic Approach Based on Schmidt Theory [PDF]
E3S Web of ConferencesEnvironmental concern and the impact on climate change have spawned various technological innovations for high efficiency engines that save fuel and produce less carbon emissions.
Rahmanto Raden Hengki +2 more
doaj +1 more source
The Power and Efficiency Analyses of the Cylindrical Cavity Receiver on the Solar Stirling Engine
Energies, 2020 The technique of solar dish and Stirling engine combination is the most challenging and promising one. For the efficient conversion of the externally concentrated heat to the usable power, we studied the influences of the wall temperature, inclination ...
Ji-Qiang Li +2 more
doaj +1 more source