Concept
Angular momentum
Related publications (429)
3D printed large amplitude torsional microactuators powered by ultrasound
Mahmut Selman Sakar, Mehdi Ali Gadiri, Junsun Hwang, Amit Yedidia Dolev
Here, we introduce a design, fabrication, and control methodology for large amplitude torsional microactuators powered by ultrasound. The microactuators are 3D printed from two polymers with drastically different elastic moduli as a monolithic compliant me ...
2024Wave-momentum shaping for moving objects in heterogeneous and dynamic media
Romain Christophe Rémy Fleury, Matthieu Francis Malléjac, Bakhtiyar Orazbayev, Stefan Rotter
Light and sound waves can move objects through the transfer of linear or angular momentum, which has led to the development of optical and acoustic tweezers, with applications ranging from biomedical engineering to quantum optics. Although impressive manip ...
2024Design of a Flexure-Based Flywheel for the Storage of Angular Momentum and Kinetic Energy
Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger
The flywheel is a widespread mechanical component used for the storage of kinetic energy and angular momentum. It typically consists of cylindrical inertia rotating about its axis on rolling bearings, which involves undesired friction, lubrication, and wea ...
2024Leveraging Continuous Time to Understand Momentum When Training Diagonal Linear Networks
Nicolas Henri Bernard Flammarion, Hristo Georgiev Papazov, Scott William Pesme
In this work, we investigate the effect of momentum on the optimisation trajectory of gradient descent. We leverage a continuous-time approach in the analysis of momentum gradient descent with step size and momentum parameter that allows u ...
2024On the Generalization of Stochastic Gradient Descent with Momentum
Volkan Cevher, Kimon Antonakopoulos
While momentum-based accelerated variants of stochastic gradient descent (SGD) are widely used when training machine learning models, there is little theoretical understanding on the generalization error of such methods. In this work, we first show that th ...
Brookline2024Mechanism balancing taxonomy
Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans
The balancing of mechanisms consists in distributing their moving masses, inertias, and elastic components in order to achieve key mechanical properties, such as the elimination of the shaking forces and moments exported onto their supporting structure or ...
2023Multipolar Pseudochirality-Induced Optical Torque
Olivier Martin, Karim Achouri, Andrei Kiselev, Mintae Chung
It has been observed that achiral nanoparticles, such as flat helices, may be subjected to an optical torque even when illuminated by normally incident linearly polarized light. However, the origin of this fascinating phenomenon has so far remained mostly ...
Washington2023Strength and timing of primary and secondary vortices generated by a rotating plate
Karen Ann J Mulleners, Diego Francescangeli
Accurate predictions of how vortices grow, evolve, and separate from aerodynamic objects are desirable for various applications ranging from autonomous aerial vehicles to wind turbines. Here, we present an experimental characterisation of the formation pro ...
2023On A Special Symmetry In The Dynamics Of Complex Systems In A Holographic-Type Perspective
By operating with the Scale Relativity Theory in the dynamics of complex systems, we can achieve a description of these complex systems through a holographic-type perspective. Then, gauge invariances of a Riccati-type become functional in complex system dy ...
UNIV POLITEHNICA BUCHAREST, SCI BULL2023Single-shot Kramers-Kronig complex orbital angular momentum spectrum retrieval
Camille Sophie Brès, Jianqi Hu, Yujie Chen
Orbital angular momentum (OAM) spectrum diagnosis is a fundamental building block for diverse OAM-based systems. Among others, the simple on-axis interferometric measurement can retrieve the amplitude and phase information of complex OAM spectra in a few s ...
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS2023