Results 241 to 250 of about 30,307 (306)

Synchronization of coaxial co-rotating tri-exciter with two torsional springs in far-resonance system. [PDF]

Sci Rep
Hou D, Liang Z, Hou Y, Fang P, Du M.
europepmc   +1 more source

Static and Dynamic Analysis of Porous Gas Bearings Lubricated With Air, Refrigerant R‐134a, Helium and Hydrogen

Lubrication Science, EarlyView.
ABSTRACT Porous gas bearings (PGBs) enable high‐speed, oil‐free operation in modern rotating machinery. This study develops a coupled thermo‐hydrodynamic (THD) model for a cylindrical porous gas bearing lubricated with four working fluids—air, R‐134a, helium and hydrogen.
S. Bechiri, B. Bouchehit, B. Bou‐Saïd
wiley   +1 more source

Emergent Synchronization and Self-Organization of Autonomous Nanospinners. [PDF]

Nano Lett
Afsari T, Ahmed S.
europepmc   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source

3D-Printed Device for Efficient Packing of Semisolid Samples in 3.2-mm Rotors Used in Cryoprobe Systems. [PDF]

Magn Reson Chem
Gelardo A, Titaux-Delgado GA.
europepmc   +1 more source

Prototyping an Innovative Ducted Fan System With Multi‐element Wings for the Electric Propulsion of Flying Devices

Macromolecular Symposia, EarlyView.
ABSTRACT This paper presents theoretical aspects and experimental tests for the design and optimization of a novel ducted fan propulsion system, complemented by multi‐element wings inspired by Handley Page and the aerodynamic Channel Wing concept.
Adrian Niță, Magdalena Roşu, Adina‐Mihaela Struț, Nicolae Pop, Mihaiela Iliescu   +4 more
wiley   +1 more source

Guidance Navigation and Control for Quadrotor UAV Using Lyapunov-Based Backstepping. [PDF]

Sensors (Basel)
Sasiadek JZ, Shuker A, Al-Isawi MMA.
europepmc   +1 more source

Research Regarding Manufacturing Process of an Electronic Hybrid Polymer Structure. Design and Technologies for Polymeric and Composites Products

Macromolecular Symposia, EarlyView.
ABSTRACT An electronic hybrid polymer structure represents a product that combines polymeric materials with electronic properties—by incorporating conductive materials (metals or conductive polymers) or through the interaction with organic semiconductors.
Beniamin Constantin Vălimăreanu, Constantin Gheorghe Opran   +1 more
wiley   +1 more source

Enhanced geometry control powered by AI for UAVS with a robotic arm for compensating for disturbances. [PDF]

Sci Rep
Oqda K, El-Gendy EM, Marie HS, Akalla M.
europepmc   +1 more source