Results 81 to 90 of about 891,158 (301)

Micro‐habitat selection by boreal woodland caribou improves access to food

Wildlife Biology, EarlyView.
Bio‐logging sensors attached to radiotelemetry receivers have great potential to transform our understanding of the ecological, physiological, and energetic constraints that shape patterns of wildlife movement under field conditions. We used video camera collars to assess microhabitat selectivity by woodland caribou Rangifer tarandus in boreal forests ...
Ian D. Thompson, Philip A. Wiebe, Arthur R. Rodgers, Douglas Reid, James A. Baker, Brent R. Patterson, Eric McNeill, Romain Dejeante, John M. Fryxell   +8 more
wiley   +1 more source

The installation of a common rail diesel engine on a light helicopter of the eurocopter EC120 class

Ingeniería e Investigación, 2016
A feasibility study for the installation of a CRDID (Common Rail Direct Injection Diesel) on a light helicopter is introduced. The total mass available for the CRDID is evaluated starting from fuel consumption and helicopter data.
Leonardo Frizziero, Luca Piancastelli
doaj   +1 more source

Parturition timing and the pre‐ and post‐partum behaviour of female moose assessed using animal‐borne video and movement‐based approaches

Wildlife Biology, EarlyView.
Limited information on moose calving behaviour, including parturition timing, cow‐calf interactions, and pre‐ and post‐partum movement patterns hinder our ability to define calving phenology and habitat use. GPS‐collars were deployed on 89 female moose over five years, including eight collars equipped with animal‐borne video and environmental data ...
Mikaela Borgeaud LeBlanc, Manuelle Landry‐Cuerrier, Vincent Brodeur, Murray M. Humphries   +3 more
wiley   +1 more source

Prediction of pilot workload in helicopter landing after one engine failure

, 2020
This paper presents a method to predict the pilot workload in helicopter landing after one engine failure. The landing procedure is simulated numerically via applying nonlinear optimal control method in the form of performance index, path constraints and
Zhiming Yu, Xufei Yan, Renliang Chen
semanticscholar   +1 more source

Modelling the Four‐Dimensional Power Line Sag Dynamics by Point Signature in Time‐Series Synthetic‐Aperture Radar Images

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, Tao Li, Mahdi Motagh, Yan Liu, Yangmao Wen   +4 more
wiley   +1 more source

Neural Network System for Predicting Anomalous Data in Applied Sensor Systems

Applied System Innovation
This article advances the research on the intelligent monitoring and control of helicopter turboshaft engines in onboard conditions. The proposed neural network system for anomaly prediction functions as a module within the helicopter turboshaft engine ...
Serhii Vladov, Victoria Vysotska, Valerii Sokurenko, Oleksandr Muzychuk, Mariia Nazarkevych, Vasyl Lytvyn   +5 more
doaj   +1 more source

LAWS OF MULTIPHASE FLOW BEHAVIOR IN THE HELICOPTER GAS TURBINE ENGINE INLET DUCT

Авіаційно-космічна техніка та технологія, 2017
The results of finite element modeling of the airflow contains dust particles of various sizes in the helicopter gas turbine engine air inlet duck with mounted and dismounted dust protective device are given.
Я. В. Двирник, Д. В. Павленко   +1 more
doaj   +1 more source

The cost of applying current helicopter external noise reduction methods while maintaining realistic vehicle performance [PDF]

Analytical methods were developed and/or adopted for calculating helicopter component noise, and these methods were incorporated into a unified total vehicle noise calculation model.
Bowes, M. A.
core   +1 more source

Assessment of the Feasibility of an Extended Range Helicopter Operational Standard for Offshore Flights [PDF]

, 2018
The accident rate of rotorcraft has improved signi1cantly over the years but at a slow pace, and in any case the number of accidents per 2ight hours is one or two orders of magnitude higher than that of commercial aircraft, a consideration that could ...
Barakos, George, Ezgi, Akel, Fasiello, Simone, Friesen, Daniel, Ghiasvand, Sara, Huercas, Sergio, Masarati, Pierangelo, Morelli, Myles, Nabi, Hafiz Noor, Pavel, Marilena, Quaranta, Giuseppe, Scaramuzzino, Paolo Francesco, Taymourtash, Neda, White, Mark, Ying, Yu   +14 more
core  

‘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