Results 51 to 60 of about 30,315 (234)

Utilising Drones in Agriculture: A Review on Remote Sensors, Image Processing and Their Application

Modern Agriculture, Volume 3, Issue 2, December 2025.
The utilisation of drones in agriculture involves the integration of advanced sensing technologies, data analytics and targeted applications. Drones equipped with sensors such as RGB, multispectral and hyperspectral capture diverse spatial and spectral data.
Chetan Yumnam, Andyco B. Marak, Manish Kumar, Sanjay Khatri, Shravan Kumar, Sapna Soni, K. Kabil, V. Balaji, Ramesh K. Sahni, Satya Prakash Kumar, V. P. Chaudhary   +10 more
wiley   +1 more source

Helicopter anti-torque system using fuselage strakes [PDF]

, 1987
The improvement of the helicopter torque control system is discussed. At low to medium forward speeds helicopter performance is limited by the effectiveness of the means for counteracting main rotor torque and controlling sideslip airloads.
Kelley, Henry L., Wilson, John C.
core   +1 more source

Aerodynamic and acoustic analysis of helicopter main rotor blade tips in hover [PDF]

, 2016
Purpose: The design of main rotor blade tips is of interest to helicopter manufactures since the tip details affect the performance and acoustics of the rotor. The paper aims to discuss this issue.
Barakos, George, Batrakov, Andrei Sergeevich, Garipova, Lyaysan Ildusovna, Kusyumov, Alexander Nikolaevich, Mikhailov, Sergey Anatolievich   +4 more
core   +1 more source

Drone‐Assisted Organ Transport: A Scoping Review of Clinical, Regulatory, and System Readiness

Clinical Transplantation, Volume 39, Issue 12, December 2025.
ABSTRACT Organ transport remains a critical determinant of transplant success, with delays during transfer prolonging cold ischemia time (CIT) and increasing the risk of delayed graft function or organ discard. Uncrewed aerial vehicles (UAVs) have emerged as a potential means to enhance the speed, predictability, and resilience of transplant logistics.
Robson G. Gilmour, Mekhola Hoff
wiley   +1 more source

Time domain System Identification of Longitudinal Dynamics of Single Rotor Model Helicopter using SIDPAC [PDF]

Mehran University Research Journal of Engineering and Technology, 2015
This paper presents a time-domain approach for identification of longitudinal dynamics of single rotor model helicopter. A frequency sweep excitation input signal is applied for hover flying mode widely used for space state linearized model.
Arbab Nighat Khizer, Imtiaz Hussain, Wanod Kumar   +2 more
doaj  

Effect of Airfoil's Attack Angle and Airfoil‐Cylinder Configuration on Turbulence Parameters and Airfoil's Aerodynamic Efficiency

Energy Science &Engineering, Volume 13, Issue 11, Page 5432-5450, November 2025.
The increasing demand for energy in daily life and the finite nature of fossil fuel reserves have driven researchers worldwide to explore renewable energy sources such as wind energy. To optimize the performance and minimize energy losses in vertical wind turbines, parameters such as the airfoil's angle of attack, as well as the horizontal and vertical
Reza Abbaspour, Mitra Yadegari, Abdolamir Bak Khoshnevis   +2 more
wiley   +1 more source

Research of Wind–Wave–Ship Coupled Effects on Ship Airwake and Helicopter Aerodynamic Characteristics

Journal of Marine Science and Engineering
The oceanic wind and waves, as well as the resultant ship motions, significantly impact the ship airwake and the operation of shipborne helicopters. A numerical method coupling wind, wave, ship and helicopter is developed using multiphase flow, in which ...
Kun Zong, Luyao Qi, Yongjie Shi, Wei Han, Shan Ma   +4 more
doaj   +1 more source

Mathematical modeling and investigating the effect of the area of the horizontal stabilizer on the stability of a single-main-rotor helicopter in forward flight [PDF]

مجله مدل سازی در مهندسی, 2019
This paper investigates the effect of the area of the horizontal stabilizer of a single-main-rotor helicopter on its dynamic responses, stability properties, and flight handling quality during forward flights.
Fatemeh Ghaderi, Farid Shahmiri
doaj   +1 more source

Dynamic Stall Characteristics of Thick Wind Turbine Airfoils

Wind Energy, Volume 28, Issue 11, November 2025.
ABSTRACT This paper studies the dynamic stall characteristics of thick flatback and nonflatback wind turbine airfoils. Two airfoils with a maximum thickness of 35%$$ 35\% $$ were studied, with trailing edge thicknesses of 2%$$ 2\% $$ and 10%$$ 10\% $$, respectively.
Mehdi Doosttalab, Carlos Simao Ferreira, Daniele Ragni, Wei Yu, Christof Rautmann   +4 more
wiley   +1 more source

A Research Methodology for Wind Tunnel Investigation of Development and Demise of a Vortex Ring State [PDF]

Problemy Mechatroniki, 2016
The Vortex Ring State (VRS) of the main rotor is one of the threats for the safety of a helicopter. Therefore this phenomenon has been intensively investigated for several years, in order to understand the mechanisms of its development and the ...
Katarzyna SURMACZ, Paweł RUCHAŁA, Wit STRYCZNIEWICZ   +2 more
doaj   +1 more source