Results 21 to 30 of about 340,877 (291)

Implications of a 20-Hz Booster cycle-rate for Slip-stacking [PDF]

open access: yes, 2014
We examine the potential impacts to slip-stacking from a change of the Booster cycle-rate from 15- to 20-Hz. We find that changing the Booster cycle-rate to 20-Hz would greatly increase the slip-stacking bucket area, while potentially requiring greater ...
Eldred, Jeffrey, Zwaska, Robert
core   +1 more source

Michelson Interferometry with the Keck I Telescope [PDF]

open access: yes, 2000
We report the first use of Michelson interferometry on the Keck I telescope for diffraction-limited imaging in the near infrared JHK and L bands. By using an aperture mask located close to the f/25 secondary, the 10 m Keck primary mirror was transformed ...
Buscher D.   +22 more
core   +2 more sources

Effects of fracture aperture and roughness on hydraulic and mechanical properties of rocks : implication of seismic characterization of fractured reservoirs [PDF]

open access: yes, 2005
Roughness and aperture are two important characteristic parameters controlling fluid flow in natural joints and fractures. It has been demonstrated by many authors that knowledge of roughness does not directly lead to that of aperture, and aperture ...
Liu, Enru
core   +1 more source

Measuring cosmic shear with the ring statistics [PDF]

open access: yes, 2009
Commonly used methods to decompose E- and B-modes in cosmic shear, namely the aperture mass dispersion and the E/B-mode shear correlation function, suffer from incomplete knowledge of the two-point correlation function (2PCF) on very small and/or very ...
Bartelmann   +36 more
core   +3 more sources

Noise-robust range alignment method for inverse synthetic aperture radar based on aperture segmentation and average range profile correlation

open access: yesEURASIP Journal on Advances in Signal Processing, 2021
Range alignment is an essential procedure in the translation motion compensation of inverse synthetic aperture radar imaging. Global optimization or maximum-correlation-based algorithms have been used to realize range alignment.
Yue Lu, Jian Yang, Yue Zhang, Shiyou Xu
doaj   +1 more source

Optimized silicon AWG with flattened spectral response using an MMI aperture [PDF]

open access: yes, 2013
We demonstrate compact 12-channel 400 GHz arrayed waveguide grating wavelength demultiplexers (AWG) in silicon with a flattened spectral response. Insertion loss, crosstalk and non-uniformity are -3.29 dB, 17.0 dB and 1.55 dB, respectively. The flattened
Bogaerts, Wim   +4 more
core   +2 more sources

Particle tracking stereomicroscopy in optical tweezers: control of trap shape [PDF]

open access: yes, 2010
We present an optical system capable of generating stereoscopic images to track trapped particles in three dimensions. Two-dimensional particle tracking on each image yields three dimensional position information.
Asavei   +34 more
core   +1 more source

Filtration characteristics of composite filter of woven-nonwoven geotextile in tailings ponds

open access: yesJournal of Industrial Textiles, 2022
Nonwoven geotextiles are widely used in tailings ponds for filtration and drainage, but there is a risk of failure of nonwoven geotextile due to physical clogging.
Sheng Liu   +3 more
doaj   +1 more source

Laser beam shaping in an apodizer with a rectangular serrated aperture

open access: yesКомпьютерная оптика, 2023
Profile transformation of a uniform monochromatic beam with a flat wavefront after the propagation through an apodizer comprising a square serrated aperture and a spatial filter is theoretically considered at the apodizer exit and behind it.
I.M. Sizova
doaj   +1 more source

Photoacoustic tomography of a rat cerebral cortex with a ring-based ultrasonic virtual point detector [PDF]

open access: yes, 2007
We image a rat cerebral cortex in situ by using a ring-based ultrasonic virtual point detector developed previously. Compared to the image generated by a finite-aperture detector, the image generated by the virtual point detector has a uniformly ...
Wang, Lihong V., Yang, Xinmai
core   +2 more sources

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