Results 101 to 110 of about 51,014 (299)
Spatiotemporal mapping the usable space of free‐roaming equids across the western United States
Wildlife Society Bulletin, EarlyView.Identification of the inter‐decadal (2010‐2011) enhancement‐degradation gradients in the usable space for wild equid Herd Management Areas in the Great Basin, USA. Abstract Management of feral equids in the American West is hindered by the lack of a formal habitat map and monitoring system.
Alexander Hernandez +3 more
wiley +1 more source
Nanjing Hangkong Hangtian Daxue XuebaoDynamic stall significantly limits the flight performance of helicopters. To reveal the mechanism behind the variations in aerodynamic moments and damping characteristics under unsteady freestream， a numerical simulation method for the unsteady flow ...
GAO Yuan +4 more
doaj +1 more source
The flow physics of helicopter brownout
, 2010 The formation of the dust cloud that is associated with low-level helicopter operations in desert environments has been simulated using the Vorticity Transport Model together with a coupled model to represent the entrainment and subsequent transport of ...
Brown, R.E. +2 more
core
High Voltage, EarlyView.ABSTRACT Power lines in synthetic‐aperture radar (SAR) images are reflected as point signatures, which fluctuate annually in both the azimuth and range directions. A novel framework is proposed in this paper to evaluate the four‐dimensional dynamic status of power line sag using those point signatures in time‐series SAR images.
Sijie Ma +4 more
wiley +1 more source
GENERATION OF AN ADVANCED HELICOPTER EXPERIMENTAL AERODYNAMIC DATABASE
, 2009 The GOAHEAD-consortium was created in the frame of an EU-project in order to create an experimental database for the validation of 3D-CFD and comprehensive aeromechanics methods for the prediction of unsteady viscous flows including rotor dynamics for ...
Sheng, W. +6 more
core
High-Fidelity Optimization Framework for Helicopter Rotors
, 2009 An optimization framework for helicopter rotors based on high-fidelity coupled CFD/CSM analyses is presented. For this purpose the optimization software DAKOTA has been linked to a parametric geometry unit, a mesh generation unit and a fluid-structure ...
Imiela, Manfred
core
Value in the ‘valley of the shadow of death’—When the user is no longer the value arbiter
Australian Journal of Public Administration, EarlyView.Abstract The Public Service Logic (PSL) user‐centric perspective on value creation has been one of its main critiques. Scholars argue that for some real‐world applications, such as emergency services, where users cannot engage with service offerings, the PSL must consider the roles of other service actors beyond just facilitators.
Higor Leite, Stephen Osborne
wiley +1 more source
, 1960 Video footage from the WBAP-TV television station in Fort Worth, Texas, to accompany a news story about a helicopter at the Bell Helicopter plant in Hurst attempting to break a world ...
WBAP-TV (Television station : Fort Worth, Tex.)
core +1 more source
‘Reinventing’ the Beach? Lessons from a Local Development Plan in the French Riviera
The Political Quarterly, EarlyView.Abstract Coastal squeeze is now so tangible both globally and locally that the focus of scientific debate has expanded from the erosion of beaches to the risk of their disappearance. In this context, it is crucial to explore local development plans that aim to preserve the long‐term existence of a beach.
Isabelle Bruno, Grégory Salle
wiley +1 more source
Dynamic Stall Mechanisms of Pitching Airfoil: IDDES Study Across Different Mach Numbers
Applied SciencesThis study investigates dynamic stall mechanisms of a pitching NACA 0012 airfoil through high-fidelity computational fluid dynamics (CFD) simulations.
Simeng Jing +4 more
doaj +1 more source