Results 51 to 60 of about 13,806 (183)

Synthesis of Boronic Acid‐Cross‐Linked Diene‐Based Polymers via Free‐Radical Copolymerization

Chemistry – An Asian Journal, Volume 21, Issue 2, 28 January 2026.
ABSTRACT Conjugated diene polymers cross‐linked with boronic acid functionalities were synthesized via free‐radical copolymerization of styrylboronic acid and isoprene or myrcene. The polymerization proceeded with an identical boron incorporation to the comonomer feed in a 1,4‐specific manner.
Manami Kawamoto, Shin‐ichi Kihara, Subrata Dolui, Mari Nishizono, Yuushou Nakayama, Takeshi Shiono, Ryo Tanaka   +6 more
wiley   +1 more source

Blade Shape Optimization and Analysis of a Propeller for VTOL Based on an Inverse Method

Applied Sciences, 2022
With the rapid development of vertical takeoff and landing (VTOL) aircraft, the blade design of a propeller suitable for VTOL aircraft with a wide range of operating conditions has become a challenging and popular task.
Xinglu Xia, Dongli Ma, Liang Zhang, Xing’an Liu, Keran Cong   +4 more
doaj   +1 more source

Experimental Evaluation of Electric Powertrain System for Unmanned Aerial Vehicles

Engineering Reports, Volume 8, Issue 1, January 2026.
Electric Powertrain Performance Metrics and Selection Workflow for UAVs. ABSTRACT With the growing use of unmanned aerial vehicles (UAVs) in both civil and military applications, optimizing electric powertrain systems is essential to enhance endurance, efficiency (η$$ \eta $$), and mission adaptability.
Srikanth Goli, Dilek Funda Kurtuluş, Imil Hamda Imran, Taiba Kouser, Abdulrahman Aliyu, Luai M. Alhems, Azhar M. Memon   +6 more
wiley   +1 more source

Rancang Bangun Sensor Radar Sense And Avoid Uav Untuk Smart System Teletransport Alat Kesehatan

Jurnal Teknologi Informasi dan Ilmu Komputer, 2021
Perancangan sensor radar untuk  sense and avoid (SAA) sistem pesawat tanpa awak (UAV) bertujuan agar operasi teletransport alat kesehatan dengan UAV VTOL berjalan dengan aman terhindar dari kecelakaan tabrakan di udara.
Agus Hendra Wahyudi
doaj   +1 more source

Ringed Seal (Pusa hispida) Abundance in Isfjorden, Svalbard, After 20‐Years of Climate Change and a Concomitant Survey Hiatus

Marine Mammal Science, Volume 42, Issue 1, January 2026.
ABSTRACT Ringed seals (Pusa hispida) in Svalbard, Norway, are suspected to be declining due to a significant reduction in land‐fast sea ice, which serves as an essential breeding habitat, but were last surveyed in 2002. We address this data gap by conducting Uncrewed Aerial Systems (UAS) aerial surveys throughout Isfjorden (including adjacent small ...
Marc Rams i Rios, Kit M. Kovacs, Christian Lydersen, Rolf Anker Ims, Andrew Lowther   +4 more
wiley   +1 more source

Design of attitude solution algorithm for tail-sitter VTOL UAV

Journal of Hebei University of Science and Technology, 2016
The tail-sitter Vertical Takeoff and Landing (VTOL) Unmanned Aerial Vehicle(UAV), flying in a fixed-wing model, overcomes many shortcomings of traditional fixed-wing UAVs, and inherits the advantage of high overall efficiency, which means it has great ...
Donghui LIU, Lele XI, Mengran NIU, Xiaoyun SUN, Nan SHI   +4 more
doaj   +1 more source

Quantifying the latitudinal representivity of in situ solar wind observations [PDF]

, 2020
Advanced space-weather forecasting relies on the ability to accurately predict near-Earth solar wind conditions. For this purpose, physics-based, global numerical models of the solar wind are initialized with photospheric magnetic field and coronagraph ...
Lang, Matthew, Lawless, Amos S., Lockwood, Mike, Owens, Mathew J., Riley, Pete   +4 more
core   +1 more source

Research on Independent Reference Model–Based Anti‐Interference Control for Quadrotor

Journal of Control Science and Engineering, Volume 2026, Issue 1, 2026.
The quadrotor is vulnerable to internal model parameters uncertainty and external airflow. In order to guarantee that the quadrotor tracks the reference signal quickly and smoothly under the influence of external airflow interferences and internal parameter uncertainties, an independent reference model–based anti‐interference control algorithm was ...
Jun Li, Haili Lang, Xiaotong Wu, Hongwei Liu, Deepali   +4 more
wiley   +1 more source

Design & Implementation of an Electric Fixed-wing Hybrid VTOL UAV for Asset Monitoring

Journal of Aerospace Technology and Management, 2023
Fixed-wing unmanned aerial vehicles (UAVs) offer the best aerodynamic efficiency required for long-distance or high-endurance applications, albeit their runway requirement for take-off and landing in comparison with quadcopters, helicopters, and ...
Sarvesh Sonkar, Prashant Kumar, Yuvaraj Tanjore Puli, Riya Catherine George, Deepu Philip, Ajoy Kanti Ghosh   +5 more
doaj  

Thermal–Structural Assessment of a Convergent Nozzle for UAV Applications Using Advanced Steady‐State Thermal Analysis

Journal of Engineering, Volume 2026, Issue 1, 2026.
This study presents an in‐depth structural evaluation of the convergent nozzle in a microgas turbine engine (MGTE), focusing on the performance of various lightweight materials used in aerospace applications. The research investigates both structural and aerothermal characteristics of the nozzle under realistic operating conditions.
Darshan Kumar Jayaram, Gopinath Vinayagam, Beena Stanislaus Arputharaj, Vijayanandh Raja, Arpan Hazra   +4 more
wiley   +1 more source