Results 41 to 50 of about 1,458,190 (338)

Analysis of Flow Structures and Global Parameters across a Heated Square Cylinder in Forced and Mixed Convection

open access: yesAtmosphere, 2022
In the present study, numerical simulations are performed to identify the role of Reynolds number (Re), Richardson number (Ri) and free-stream orientations (α) on flow structures, aerodynamic parameters and heat transfer characteristics for the ...
Rashid Ali, Nadeem Hasan
doaj   +1 more source

Initial results from a field campaign of wake steering applied at a commercial wind farm – Part 1

open access: yesWind Energy Science, 2019
. Wake steering is a form of wind farm control in which turbines use yaw offsets to affect wakes in order to yield an increase in total energy production. In this first phase of a study of wake steering at a commercial wind farm, two turbines implement a
P. Fleming   +18 more
semanticscholar   +1 more source

Field experiment for open-loop yaw-based wake steering at a commercial onshore wind farm in Italy

open access: yesWind Energy Science, 2020
. The concept of wake steering on wind farms for power maximization has gained significant popularity over the last decade. Recent field trials described in the literature not only demonstrate the real potential of wake steering on commercial wind farms ...
B. Doekemeijer   +14 more
semanticscholar   +1 more source

Formation Flight of Fixed-Wing UAVs: Dynamic Modeling, Guidance Design, and Testing in Realistic Scenarios

open access: yesAerospace
Autonomous unmanned flight based on fixed-wing aircraft constitutes a practical and economical solution for transport missions to remote destinations or disadvantaged communities, for which their payload and range represent interesting figures of merit ...
Carlo E.D. Riboldi, Marco Tomasoni
doaj   +1 more source

Sleep EEG Derived From Behind-the-Ear Electrodes (cEEGrid) Compared to Standard Polysomnography: A Proof of Concept Study

open access: yesFrontiers in Human Neuroscience, 2018
Electroencephalography (EEG) recordings represent a vital component of the assessment of sleep physiology, but the methodology presently used is costly, intrusive to participants, and laborious in application.
Annette Sterr   +13 more
doaj   +1 more source

Orexin and MCH neurons: regulators of sleep and metabolism

open access: yesFrontiers in Neuroscience, 2023
Sleep-wake and fasting-feeding are tightly coupled behavioral states that require coordination between several brain regions. The mammalian lateral hypothalamus (LH) is a functionally and anatomically complex brain region harboring heterogeneous cell ...
Hanan Bouâouda, Pawan Kumar Jha
doaj   +1 more source

Anthropogenic signals recorded in an ice core from Eclipse Icefield, Yukon Territory, Canada [PDF]

open access: yes, 2001
Trends in the annual flux of sulfate and nitrate in a new ice core collected at an elevation of 3017 m on Eclipse Icefield, 45 km northeast of Mt. Logan were examined to determine the effect of anthropogenic activity on precipitation chemistry in the ...
Wake, Cameron P, Yalcin, Kaplan
core   +3 more sources

Research on Unsteady Wake Characteristics of the NREL 5MW Wind Turbine Under Yaw Conditions Based on a LBM-LES Method

open access: yesFrontiers in Energy Research, 2022
The yaw of a large-scale wind turbine will change the aerodynamic performance of its substructures. In view of this, this article applied a LBM-LES method to numerically simulate the yawed MEXICO wind turbine and compared the numerical results with the ...
Feifei Xue   +6 more
doaj   +1 more source

Receiver Design for Realizing On-Demand WiFi Wake-up using WLAN Signals

open access: yes, 2012
In this paper, we design a simple, low-cost, and low-power wake-up receiver which can be used for an IEEE 802.11-compliant device to remotely wake up the other devices by utilizing its own wireless LAN (WLAN) signals.
Ito, Tetsuya   +5 more
core   +1 more source

Improving practical sensitivity of energy optimized wake-up receivers: proof of concept in 65nm CMOS

open access: yes, 2016
We present a high performance low-power digital base-band architecture, specially designed for an energy optimized duty-cycled wake-up receiver scheme. Based on a careful wake-up beacon design, a structured wake-up beacon detection technique leads to an ...
Andersson, Oskar   +4 more
core   +1 more source

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