Showing 2,421 - 2,440 results of 2,815 for search '"helicopters"', query time: 0.15s Refine Results
  1. 2421
  2. 2422
  3. 2423

    Research on Pilot Control Strategy and Workload for Tilt-Rotor Aircraft Conversion Procedure by Xufei Yan, Ye Yuan, Renliang Chen

    Published 2023-08-01
    “…This paper studies the pilot control strategy and workload of a tilt-rotor aircraft dynamic conversion procedure between helicopter mode and fixed-wing mode. A nonlinear flight dynamics model of tilt-rotor aircraft with full flight modes is established. …”
    Get full text
    Article
  4. 2424
  5. 2425
  6. 2426

    Remote mobile health service utilization post 2005 Kashmir-Pakistan earthquake. by Chan, E, Kim, J

    Published 2010
    “…By comparing users of a remote mountainous stationary clinic and a mobile helicopter outreach clinic in Neelam Valley, 4 months post Pakistan-Kashmir earthquake, this study aims to: (i) compare the demographic and disease profile of health service users, (ii) examine how acute and chronic disease patterns vary with clinical settings, and (iii) discuss the potential implications to mobile emergency clinical service planning acute phase of natural disaster in remote areas. …”
    Journal article
  7. 2427

    Review Concerning Violence. Directed by Göran Olsson. Produced by Final Cut for Real, Helsinki Filmi Oy, Louverture Films. 2014 by Murrey, A

    Published 2015
    “…Göran Olsson’s filmic account of what is perhaps Frantz Fanon’s (1961) most famous chapter in The Wretched of the Earth, “Concerning Violence,” opens as a soldier, from his secure vantage point in a hovering helicopter, shoots a horned bull as it races across an open field. …”
    Journal article
  8. 2428

    Out-of-Plane Compression Behaviour of Aluminum Alloy Large-Scale Super-Stub Honeycomb Cellular Structures by Song Lin, Meini Yuan, Bing Zhao, Beibei Li

    Published 2023-01-01
    “…The research results are beneficial to the application and development of large-scale super-stub honeycomb structures in structural engineering, such as the helicopter landing platforms, the base of fluid and gas tanks and ship decks.…”
    Get full text
    Article
  9. 2429

    Mechanical Performances of Lightweight Sandwich Structures Produced by Material Extrusion-Based Additive Manufacturing by Sebastian Marian Zaharia, Larisa Anamaria Enescu, Mihai Alin Pop

    Published 2020-08-01
    “…Finally, the three honeycomb, diamond-celled and corrugated core typologies were used in the leading edge of the wing and were impact tested and the results created favorable premises for using such structures on aircraft models and helicopter blade structures.…”
    Get full text
    Article
  10. 2430

    AIRBORNE CAMERA SYSTEM FOR REAL-TIME APPLICATIONS – SUPPORT OF A NATIONAL CIVIL PROTECTION EXERCISE by V. Gstaiger, H. Römer, D. Rosenbaum, F. Henkel

    Published 2015-04-01
    “…For this purpose a camera system was developed to be operated from a helicopter with light-weight processing units and microwave link for fast data transfer. …”
    Get full text
    Article
  11. 2431

    Implementation of a mechanical CPR device in a physician staffed HEMS – a prospective observational study by Simon Rauch, Giacomo Strapazzon, Monika Brodmann, Ernst Fop, Christian Masoner, Lydia Rauch, Alessandro Forti, Urs Pietsch, Peter Mair, Hermann Brugger

    Published 2018-04-01
    “…Abstract In this prospective, observational study we describe the incidence and characteristics of out of hospital cardiac arrest (OHCA) cases who received mechanical CPR, after the implementation of a mechanical CPR device (LUCAS 2; Physio Control, Redmond, WA, USA) in a physician staffed helicopter emergency medical service (HEMS) in South Tyrol, Italy. …”
    Get full text
    Article
  12. 2432

    Review of the State-of-the-Art of Brain-Controlled Vehicles by Amin Hekmatmanesh, Pedro H. J. Nardelli, Heikki Handroos

    Published 2021-01-01
    “…This review focuses on the most relevant topics on brain-controlled vehicles, with a special reference to the terrestrial BCV (e.g., the mobile car, car simulator, real car, graphical and gaming car) and the aerial BCV, also called BCAV (e.g., real quadcopters, drones, fixed wings, graphical helicopter, and aircraft) controlled by using bio-signals, such as electroencephalogram (EEG), Electrooculogram (EOG), and Electromyogram (EMG). …”
    Get full text
    Article
  13. 2433

    Forest Fire Spread Simulation and Fire Extinguishing Visualization Research by Qingkuo Meng, Hao Lu, Yongjian Huai, Haifeng Xu, Siyu Yang

    Published 2023-07-01
    “…In addition, based on the constructed immersive forest scene, this study explored various forms of fire extinguishing methods in the virtual environment, mainly liquid flame retardants such as water guns, helicopter-dropped flame retardants, or simulated rainfall. …”
    Get full text
    Article
  14. 2434

    Numerical study of ice accretion inside an inertial particle separator by Changbo Qiu, Ningli Chen, Yaping Hu, Biao Wang, Songjun Hu

    Published 2022-05-01
    “…The inertial particle separator (IPS) installed before a helicopter engine runs the risk of ice accretion. This paper describes a numerical study of ice accretion inside an IPS. …”
    Get full text
    Article
  15. 2435

    A Robust Model Fitting-based Method for Transmission Line Extraction from Airborne LiDAR Point Cloud Data by Juntao YANG,Zhizhong KANG,Zhou YANG

    Published 2021-09-01
    “…Experiments were performed on LiDAR point cloud data captured from the helicopter and Unmanned Aerial Vehicle (UAV) platform. …”
    Get full text
    Article
  16. 2436

    Polish Medical Air Rescue Crew Interventions Concerning Neonatal Patients by Ewa Rzońca, Grażyna Bączek, Marcin Podgórski, Robert Gałązkowski

    Published 2021-06-01
    “…The purpose of the study was to present the characteristics of Helicopter Emergency Medical Service (HEMS) and Emergency Medical Service (EMS) interventions concerning newborns in Poland. …”
    Get full text
    Article
  17. 2437

    INTEGRATION OF INS AND GNSS FOR GRAVIMETRIC APPLICATION WITH UAS by C. A. Lin, K. W. Chiang, C. Y. Kuo

    Published 2018-09-01
    “…Therefore, this study integrates a navigation-grade INS, iNAV-RQH from iMAR and GNSS from NovAtel to develope an Unmanned Aerial System (UAS) using unmanned helicopter for gravimetric application. The advantages include its good flexibility, and it is an intermediate system between the airborne and terrestrial survey in terms of the coverage and spatial resolution. …”
    Get full text
    Article
  18. 2438

    The cost of research: Lasting effects of capture, surgery and muscle biopsy on brown bear (Ursus arctos) movement and physiology by Alexandra Thiel, Anne G Hertel, Sylvain Giroud, Andrea Friebe, Boris Fuchs, Jonas Kindberg, Anne Randi Græsli, Jon M Arnemo, Alina L Evans

    Published 2023-01-01
    “…In this study, 39 Scandinavian brown bears (Ursus arctos) captured either while hibernating in winter or via helicopter in summer and that underwent surgery as part of a human health project had their movement, body temperature and timing of onset of hibernation compared with those of 14 control bears that had not been captured during the same period. …”
    Get full text
    Article
  19. 2439

    Three-dimensional Imaging Algorithm for Multi-azimuth-angle Multi-baseline Spaceborne Synthetic Aperture Radar by Kuang Hui, Yang Wei, Wang Pengbo, Chen Jie

    Published 2018-12-01
    “…Finally, the effectivenesses of the squint 3D imaging method and 3D point clouds fusion method are verified by point targets simulation experiment with 45° azimuth angle and helicopter simulation experiments with 45° and –45° azimuth angles, respectively.…”
    Get full text
    Article
  20. 2440

    Numerical Simulation of Continuous Tilting Transition of Tiltrotor Aircraft by WU Weiwei, MA Cunwang, ZHANG Lian, SUN Kaijun

    Published 2021-06-01
    “…The aerodynamic configuration of the tiltrotor aircraft is constantly changed during the tilting transition process, and the aerodynamic characteristics is of strongly nonlinear characteristics.Aiming at the complex states of continuous tilting transition for the tiltrotor aircraft, the grid system suitable for the simulation of the continuous tilting transition for the tiltrotor aircraft is established through the moving embedded grid and local coordinate system theory, and based on the RANS equation, a CFD method suitable for unsteady flow field analysis with strongly nonlinear aerodynamic characteristics is established.The method is used to simulate the aerodynamic characteristics of the continuous tilt transition for a certain type tiltrotor aircraft from helicopter mode to fixed wing mode.The results show that the aerodynamic characteristics of the rotors and the airframe have the same trend with the increase of the rotor tilt angle for different tilt transition time.As the rotor tilt angle increase, the lift coefficient of airframe is firstly increased and then decreased, and achieved the maximum value near 40°, which is increased by about 30%in comparison with the initial state and level flight.As the rotor tilt angle, with the increased of collective pitch angle and forward flight speed linearly, the rotor tension coefficient and its vertical component gradually are decreased gradually.With the linear increase of the rotor tilt angle and forward flight speed, the total lift of the tiltrotor aircraft can be kept near the target value by using a suitable nonlinear variation curve of the collective pitch angle.…”
    Get full text
    Article