Results 11 to 20 of about 1,998,737 (342)

Temperature-Modulated Micromechanical Thermal Analysis with Microstring Resonators Detects Multiple Coherent Features of Small Molecule Glass Transition

open access: yesSensors, 2020
Micromechanical Thermal Analysis utilizes microstring resonators to analyze a minimum amount of sample to obtain both the thermal and mechanical responses of the sample during a heating ramp.
Maximilian Karl   +4 more
doaj   +1 more source

Progressive failure analysis of helicopter rotor blade under aeroelastic loading

open access: yesAviation, 2020
Unlike metal structure, composite structures don’t give any clue till the fatal final collapse. The problem is more complicated when applied load on the structure is aeroelastic in nature. Under such loading, composite laminate experiences stresses.
Kamran Ahmad   +3 more
doaj   +1 more source

Beam shaping using Gaussian beam modes [PDF]

open access: yesJournal of the Optical Society of America A, 2010
A beam shaping method is presented where a diffractive optical element (DOE) is designed by optimizing the complex mode coefficient weights of a set of Gaussian beam modes. This method is compared with the more standard unidirectional approach. Differential evolution is used for the optimization in both the unidirectional and Gaussian beam mode ...
Lavelle, John, O'Sullivan, Créidhe
openaire   +3 more sources

How Modes Shape Casimir Physics

open access: yesInternational Journal of Modern Physics A, 2022
Modes have steadily influenced the understanding of physical systems through time. At least since the prediction of the Casimir effect, they also play a very important role in Casimir physics and in the understanding of the different phenomena typical of this research field.
openaire   +2 more sources

Correlation of Short Pitch Rail Corrugation with Railway Wheel-Track Resonance at Low Frequencies of Excitation

open access: yesVibration, 2020
As much as there has been a significant increase in the development of railway systems in recent years, one of the significant drawbacks on this mode of transport is ground-borne vibrations and noise emanating from vehicle-track interaction in service ...
Bingo Masiza Balekwa   +1 more
doaj   +1 more source

Dynamic Characterization of Cercal Mechanosensory Hairs of Crickets

open access: yesInsects, 2012
Previous dynamic characterizations of the cercal mechanosensory hairs of crickets have generally been limited to the first resonant frequency and associated deflection shape.
Joel M. Book, Samuel F. Asokanthan
doaj   +1 more source

SCALING OF OPERATIONAL MODE SHAPES USING SENSITIVITY ANALYSIS [PDF]

open access: yesمجله مدل سازی در مهندسی, 2009
Recently, identification of dynamic properties of structures such as bridges, towers and building, which are not easy to excite, is possible by measuring only the output responses. Due to measuring only the responses when the structure is excited only by
محمد مهدی Khatibi   +2 more
doaj   +1 more source

Microbubble shape oscillations excited through ultrasonic parametric driving\ud [PDF]

open access: yes, 2010
An air bubble driven by ultrasound can become shape-unstable through a parametric instability. We report time-resolved optical observations of shape oscillations (mode n=2 to 6) of micron-sized single air bubbles.
Dollet, Benjamin   +7 more
core   +5 more sources

Influence of Mechanical Properties on Modal Analysis of Natural Fiber Reinforced Laminated Composite Trapezoidal Plates

open access: yesJournal of Natural Fibers, 2021
Present work concentrates on modal parameters of laminated composite plates composed of natural fibers reinforced with unsaturated polyester resin. The selected jute and ramie fibers underwent alkaline treatment to improve mechanical properties.
D.R. Rajkumar   +2 more
doaj   +1 more source

Numerical calculations of diffraction losses in advanced interferometric gravitational wave detectors [PDF]

open access: yes, 2007
Knowledge of the diffraction losses in higher-order modes of large optical cavities is essential for predicting three-mode parametric photon-phonon scattering, which can lead to mechanical instabilities in long-baseline gravitational wave detectors.
Barriga, Pablo   +3 more
core   +1 more source

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