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Optical Detection of Volatile Organic Compounds: A Review of Methods and Functionalized Sensing Materials

open access: yesAdvanced Optical Materials, Volume 13, Issue 27, September 23, 2025.
The focus on volatile organic compounds (VOCs) detection is dictated by the increasing awareness of their impact on human health. In addition, VOCs are increasingly considered novel for early diagnosis of diseases. Among various types of VOC sensor devices, optical detectors play an essential role, offering excellent versatility, fast response time ...
Aleksandra Hernik   +6 more
wiley   +1 more source

Antenna pattern shaping, sensing, and steering study Final report [PDF]

open access: yes
Design of steerable satellite antenna with beam pattern sensing ...
Bigelow, S. C.   +4 more
core   +1 more source

Performance and Airloads Analyses for a Rigid Coaxial Rotor of High-Speed Compound Unmanned Rotorcrafts [PDF]

open access: yesJournal of the Korea Institute of Military Science and Technology, 2020
Young-Min Kwon, Jae-Sang Park
openaire   +1 more source

In-place recalibration technique applied to a capacitance-type system for measuring rotor blade tip clearance [PDF]

open access: yes
The rotor blade tip clearance measurement system consists of a capacitance sensing probe with self contained tuning elements, a connecting coaxial cable, and remotely located electronics.
Barranger, J. P.
core   +1 more source

Tradeoff analysis of technology needs for public service helicopters [PDF]

open access: yes
The design requirements for a family or type of Public Service Helicopter (PSH) is examined which will satisfy the needs of municipal and state governments in the following mission areas: Emergency Medical Service--Airborne Rescue Squad; Law Enforcement;
Bauchspies, J. S.   +2 more
core   +1 more source

An Exploration of the Performance and Acoustic Characteristics of UAV-Scale Stacked Rotor Configurations [PDF]

open access: yes
As interest grows in rotor- and propeller-driven electric vertical takeoff and landing (eVTOL) aircraft for the Urban Air Mobility market, there is a potential for previously studied concepts to reemerge due to the opportunities afforded by novel ...
Fei, Xiaofan   +5 more
core   +1 more source

Design and fabrication of coaxial micro helicopter [PDF]

open access: yes, 2012
In this thesis the design of a coaxial micro helicopter is presented and based on the design, a model is fabricated. The thesis starts with the introduction on the previous models of micro helicopters like the Coax and the Epson.
Mishra, Pratik
core  

Computational Study of NASA's Quadrotor Urban Air Taxi Concept [PDF]

open access: yes
High-fidelity computational fluid dynamics simulations have been carried out in order to analyze NASA's quadrotor urban air taxi concept for urban air mobility, also know as on-demand mobility applications. High-order accurate schemes, dual-time stepping,
Ventura Diaz, Patricia, Yoon, Seokkwan
core   +1 more source

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