Results 41 to 50 of about 40,632 (210)
Estimating red deer Cervus elaphus population density using drones in a steep and rugged terrain
Wildlife Biology, EarlyView.Precise and accurate information about population density, crucial for wildlife management, is difficult to obtain for elusive species living in dense forests or steep and inaccessible terrain. Using unmanned aerial vehicles (UAVs), we developed a method for obtaining absolute population estimates of ungulates living in steep, rugged, and partly ...
Julie Bommerlund +3 more
wiley +1 more source
Experimental assessment of large mammal population estimates from airborne thermal videography
Wildlife Biology, EarlyView.Wildlife resource management requires reliable, fast, and affordable methods of surveying wildlife populations to develop and adaptively adjust policies. Thermal video from drones can yield high rates of detection over large areas with relative speed and safety.
Julia S. McElhinny +7 more
wiley +1 more source
AerospaceAircraft with a twin vertical tail and leading-edge extension configuration may experience vertical tail buffeting during high-angle-of-attack maneuvering flight.
Zhihai Liang +5 more
doaj +1 more source
Fatigue experience from tests carried out with forged beam and frame structures in the development of the Saab aircraft Viggen [PDF]
A part of the lower side of the main wing at the joint of the main spar with the fuselage frame was investigated. This wing beam area was simulated by a test specimen consisting of a spar boom of AZ 74 forging (7075 aluminum alloy modified with 0.3 ...
Larsson, S. E.
core +1 more source
Who Makes the Far Right? Exploring Membership Application Data of the National Front of Australia
Australian Journal of Politics &History, EarlyView.This paper addresses a problem for scholars examining the question of who supports far right political parties or movements. Due to the semi‐clandestine or oppositional nature of far right groups, historians, as well as those in adjacent disciplines, have often been unable to gain access to sufficient records or data to conduct analysis of who supports
Evan Smith, Lauren Pikó
wiley +1 more source
Topology optimization design of titanium alloy outer cylinder lug structure for landing gear
Materials & DesignWhile A-100 ultra-high-strength steel is widely employed in landing gear, its mass poses a constraint for advancing aircraft performance. To overcome this, the present research introduces two key innovations: the substitution with a lightweight titanium ...
Jiale Shi +6 more
doaj +1 more source
Design and evaluation of a 3 million DN series-hybrid thrust bearing [PDF]
The bearing, consisting of a 150-mm ball bearing and a centrifugally actuated, conical, fluid-film bearing, was fatigue tested. Test conditions were representative of a mainshaft ball bearing in a gas turbine engine operating at maximum thrust load to ...
Eusepi, M., Scibbe, H. W., Winn, L. W.
core +1 more source
Fatigue &Fracture of Engineering Materials &Structures, EarlyView.ABSTRACT Characterization of the crack tip, such as the stress intensity factor (SIF), is a vital step for the assessment of fatigue crack growth and prediction of potential failure in engineering structures. This study investigates the use of thermoelastic stress analysis (TSA) for SIF evaluation, including a methodology for non‐adiabatic stress field
John Codrington +3 more
wiley +1 more source
Certification of damage tolerant composite structure [PDF]
A reliability based certification testing methodology for impact damage tolerant composite structure was developed. Cocured, adhesively bonded, and impact damaged composite static strength and fatigue life data were statistically analyzed to determine ...
Dill, Harold D. +3 more
core +1 more source
Is sleep affected after microgravity and hypergravity exposure? A pilot study
Journal of Sleep Research, Volume 34, Issue 2, April 2025.Summary Sleep is known to be affected in space travel and in residents of the international space station. But little is known about the direct effects of gravity changes on sleep, if other factors, such as sleep conditions, are kept constant. Here, as a first exploration, we investigated sleep before and after exposure to short bouts of microgravity ...
Barbara Le Roy +9 more
wiley +1 more source