Results 101 to 110 of about 210,118 (339)

Gravitational Waves. Introduction to the Gravitational Wave Equation

open access: yes, 2023
Gravitational Waves represent the transport of Gravitational Energy through Space. Equation (103) represents the “Gravitational Wave Equation”. The article presents a new theory in physics which explains the interaction between gravity and light with mathematical results close to General Relativity (15 digits beyond the decimal point equal result) and
openaire   +1 more source

Feline‐Inspired Robot Enabled by Combustion‐Driven Actuators for Agile Motion and High‐Payload Obstacle Traversal

open access: yesAdvanced Science, EarlyView.
Inspired by nature's competitive maneuvers, this study introduces a combustion‐driven soft actuator that powers a multi‐modal “Jump‐and‐Fly Catbot” (JFC). With millisecond response, high‐force output (over 70 times its weight) and precise control (error within 5%), the robot can jump, fly, hover, and escape from challenging environments, achieving ...
Hongkuan Ma   +4 more
wiley   +1 more source

Probing the speed of scalar induced gravitational waves from observations

open access: yesEuropean Physical Journal C: Particles and Fields
The propagation speed of gravitational waves is a fundamental issue in gravitational theory. According to general relativity, gravitational waves propagate at the speed of light.
Jun Li, Guang-Hai Guo, Yongcan Zu
doaj   +1 more source

Analysis of negative flow of gravitational waves

open access: yesSistemnì Doslìdženâ ta Informacìjnì Tehnologìï, 2019
In this article, we made the mathematical explanation of the anti-gravitational waves, by the inspiration that we got from the observed positron in cosmic rays.
Yoshio Matsuki, Petro I. Bidyuk
doaj   +1 more source

Robust Smart Superhydrophobic Cilia

open access: yesAdvanced Science, EarlyView.
To date, ciliated surfaces cannot withstand mechanical damage because cilia/wires are inherently fragile. By aligning magneto‐responsive, flexible, superhydrophobic microwires on the sidewall of vertical frames, the frames act as armors to protect microwires from mechanical damage; when needed, the microwires re‐align uprightly under a magnet field to ...
Chuanqi Wei   +4 more
wiley   +1 more source

Thermoelastic effects in Bragg reflectors as a potential bottleneck for XFELs with megahertz repetition rate

open access: yesCommunications Physics
Bragg reflectors are essential for beam transport in X-ray free-electron laser (XFEL) facilities. On interaction with Bragg reflectors, a part of the pulse energy will be absorbed, causing the propagation of displacement waves due to rapid thermal ...
Immo Bahns   +4 more
doaj   +1 more source

Damping of gravitational waves by matter

open access: yes, 2017
We develop a unified description, via the Boltzmann equation, of damping of gravitational waves by matter, incorporating collisions. We identify two physically distinct damping mechanisms -- collisional and Landau damping.
Baym, Gordon   +2 more
core   +2 more sources

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

open access: yesAdvanced Electronic Materials, EarlyView.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

Monte Carlo Evaluations of Gamma-Ray and Radio Pulsar Populations

open access: yesThe Astrophysical Journal
Based on well-grounded Galactic neutron star populations formed from radio pulsar population syntheses of canonical pulsars (CPs) and millisecond pulsars (MSPs), we use the latest Fermi Large Area Telescope catalog (4FGL-DR4) to investigate the ...
Shawaiz Tabassum, Duncan R. Lorimer
doaj   +1 more source

Variations of the Energy of Free Particles in the pp-Wave Spacetimes

open access: yes, 2018
We consider the action of exact plane gravitational waves, or pp-waves, on free particles. The analysis is carried out by investigating the variations of the geodesic trajectories of the particles, before and after the passage of the wave.
Carneiro, F. L.   +3 more
core   +1 more source

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