Results 51 to 60 of about 20,391 (185)
Method for shaping and aiming narrow beams [PDF]
, 1981 A sonar method and apparatus is discribed which utilizes a linear frequency chirp in a transmitter/receiver having a correlator to synthesize a narrow beamwidth pattern from otherwise broadbeam transducers when there is relative velocity between the ...
Heyser, R. C.
core +1 more source
Best chirplet chain: near-optimal detection of gravitational wave chirps
, 2005 The list of putative sources of gravitational waves possibly detected by the ongoing worldwide network of large scale interferometers has been continuously growing in the last years.
Archana Pai +12 more
core +3 more sources
Validation of new satellite rainfall products over the Upper Blue Nile Basin, Ethiopia [PDF]
Atmospheric Measurement Techniques, 2018 Accurate measurement of rainfall is vital to analyze the spatial and temporal patterns of precipitation at various scales. However, the conventional rain gauge observations in many parts of the world such as Ethiopia are sparse and unevenly ...
G. T. Ayehu +5 more
doaj +1 more source
Entanglement in the adiabatic limit of a two-atom Tavis-Cummings model
, 2008 We study the adiabatic limit for the sequential passage of atoms through a high-Q cavity, in the presence of frequency chirps. Despite the fact that the adiabatic approximation might be expected to fail, we were able to show that for proper choice of ...
B M Garraway +5 more
core +1 more source
The three-dimensional carrier-envelope-phase map of focused few-cycle pulsed Gaussian beams [PDF]
, 2018 We derive an analytical expression that describes the complete three-dimensional carrier-envelope phase (CEP) distribution of in the focal volume of ultrashort pulsed Gaussian beams focused by spherical mirrors or lenses. The focal CEP map depends on the
Horváth, Zoltán L. +2 more
core +2 more sources
Water Science and TechnologyThe advancement of data-driven models contributes to the improvement of estimating rainfall–runoff models due to their advantages in terms of data requirements and high performance.
Sarunphas Iamampai +3 more
doaj +1 more source
Investigaciones GeográficasAccurate precipitation estimation is essential for water resource management, especially in tropical regions where the spatial and temporal variability of rainfall presents significant challenges.
Maycow Douglas de Oliveira Silva +3 more
doaj +1 more source
Coherent Control of Ultracold Collisions with Chirped Light: Direction Matters
, 2006 We demonstrate the ability to coherently control ultracold atomic Rb collisions using frequency-chirped light on the nanosecond time scale. For certain center frequencies of the chirp, the rate of inelastic trap-loss collisions induced by negatively ...
H. J. Metcalf +8 more
core +1 more source
Prospects for multi-messenger extended emission from core-collapse supernovae in the Local Universe
, 2019 Multi-messenger emissions from SN1987A and GW170817/GRB170817A suggest a Universe rife with multi-messenger transients associated with black holes and neutron stars.
Amati, Lorenzo +5 more
core +1 more source
, 2011 Temporal coherence of individual signal or idler beam, determined by the spectral correlation property of photon pairs, is important for realizing quantum interference among independent sources. To understand the effect of chirp on the temporal coherence
A. B. U’Ren +7 more
core +1 more source