Results 61 to 70 of about 29,160 (315)
Implication of pulsar timing array experiments on cosmological gravitational wave detection
Gravitational waves provide a new probe of the Universe which can reveal a number of cosmological and astrophysical phenomena that cannot be observed by electromagnetic waves.
Jun’ichi Yokoyama
doaj +1 more source
Virgo and the worldwide search for gravitational waves [PDF]
VIRGOLarge interferometric detectors of gravitational waves are approaching their design sensitivities and the plans for second generation detectors, expected to start the gravitational wave astronomy, are already under way.
Flaminio, R. +413 more
core +1 more source
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley +1 more source
Anatomy of non-leptonic two-body decays of charmed mesons into final states with η′
We show that D → Pη′ decay amplitudes, where P = K, π, η, cannot be simply related to their D → Pη counterparts with a single η 0–η 8 mixing angle. We propose a novel, consistent treatment of η 0–η 8 mixing for application in D → Pη and D → Pη′ decays ...
Carolina Bolognani +3 more
doaj +1 more source
Exploring String Axions with Gravitational Waves
We explore the string axion dark matter with gravitational waves in Chern–Simons gravity. We show that the parametric resonance of gravitational waves occurs due to the axion coherent oscillation.
Jiro Soda, Daiske Yoshida
doaj +1 more source
Light-cone distribution amplitudes of light mesons with QED effects
We discuss the generalization of the leading-twist light-cone distribution amplitude for light mesons including QED effects. This generalization was introduced to describe virtual collinear photon exchanges at the strong-interaction scale ΛQCD in the ...
Martin Beneke +3 more
doaj +1 more source
Quintessence and gravitational waves
We investigate some aspects of quintessence models with a non-minimally coupled scalar field and in particular we show that it can behave as a component of matter with $-3 \lesssim P/ρ\lesssim 0$. We study the properties of gravitational waves in this class of models and discuss their energy spectrum and the cosmic microwave background anisotropies ...
Riazuelo, Alain, Uzan, Jean-Philippe
openaire +2 more sources
Soft Robotic Snake with Tunable Undulatory Gait for Efficient Underwater Locomotion
This study designs an underwater soft snake robot using 3D‐printed soft actuators, controlled by specific signals to generate sinusoidal undulation. Results show a positive correlation between speed and swing amplitude, with optimal performance at 2/3π phase offset, PLA tail, 1.2 voltage growth rate, and 6s undulation period achieving a maximum speed ...
Huichen Ma, Junjie Zhou, Raye Yeow
wiley +1 more source
Revisiting stochastic gravitational wave background in the strong signal case
Weak-signal limit is often used in estimating stochastic gravitational-wave background (SGWB) intensities. This approximation fails and the signal-to-noise ratio (SNR) can be much weaker when background signals are loud compared to the detector noise. In
Zheng-Cheng Liang +4 more
doaj +1 more source
Motivated by the first search for the rare charged-current B decay to four leptons, $$\ell \bar{\nu }_\ell \ell ^{(\prime )} \bar{\ell }^{(\prime )}$$ ℓ ν ¯ ℓ ℓ ( ′ ) ℓ ¯ ( ′ ) , we calculate the decay amplitude with factorization methods. We obtain the $
Martin Beneke +3 more
doaj +1 more source

