Results 61 to 70 of about 339,455 (292)
Geofluids, 2020 The poor impermeability of fractured rock induced by excavation and construction is improved through the application of microbial-induced calcite precipitation (MICP), but it is difficult to monitor and evaluate the permeability reduction under a ...
Shuquan Peng +5 more
doaj +1 more source
Simulation studies of space-charge-dominated beam transport in large-aperture ratio quadrupoles [PDF]
Il Nuovo Cimento A, 1993 For many cases of interest in the design of heavy-ion fusion accelerators, the maximum transportable current in a magnetic quadrupole lattice scales as (a/L)/sup 2/ where a is the useful dynamic aperture and L is the half-lattice period. There are many cost benefits to maximizing the usable aperture which must be balanced against unwanted effects such ...
Fawley, W. M. +4 more
openaire +1 more source
The Structure of High Strehl Ratio Point-Spread Functions
, 2003 We describe the symmetries present in the point-spread function (PSF) of an optical system either located in space or corrected by an adaptive o to Strehl ratios of about 70% and higher.
Anand Sivaramakrishnan +7 more
core +1 more source
The Sloan Digital Sky Survey: The Cosmic Spectrum and Star-Formation History [PDF]
, 2002 We present a determination of the `Cosmic Optical Spectrum' of the Universe, i.e. the ensemble emission from galaxies, as determined from the red-selected Sloan Digital Sky Survey main galaxy sample and compare with previous results of the blue-selected ...
Andrew Connolly +20 more
core +2 more sources
Advanced Functional Materials, EarlyView.Controlled laser‐drilling of embedded HfO2 membranes creates three layer nanopores with Gaussian‐shaped cavities sculptured in the supporting layers. These embedded solid‐state nanopores slow DNA translocation by 12‐fold compared to SiNx pores, enabling high‐resolution, label‐free detection of short DNAs, RNAs, and proteins.
Jostine Joby +4 more
wiley +1 more source
, 2015 Using a sample of ~100 nearby line-emitting galaxy nuclei, we have built the currently definitive atlas of spectroscopic measurements of H_alpha and neighboring emission lines at subarcsecond scales.
Barth, Aaron J. +5 more
core +1 more source
Spectral Classification of Galaxies Along the Hubble Sequence [PDF]
, 1995 We develop a straightforward and quantitative two-step method for spectroscopically classifying galaxies from the low signal-to-noise (S/N) optical spectra typical of galaxy redshift surveys. First, using \chi^2-fitting of characteristic templates to the
Willick, Jeffrey A. +2 more
core +2 more sources
Electroactive Liquid Crystal Elastomers as Soft Actuators
Advanced Functional Materials, EarlyView.Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley +1 more source
IEEE Access, 2019 This paper focuses on the shielding effectiveness (SE) prediction of the periodic aperture array on an infinite conductor plane against a plane electromagnetic wave with its wavelength much larger than the size of a unit cell of the array.
Wanxin Bai +4 more
doaj +1 more source
Comparative study on absorbing characteristics of aperture-type and patch-type FSS
Journal of Aeronautical Materials, 2020 Aperture-type and patch-type frequency selective surfaces (FSS) were prepared by using carbon fiber paper containing carbon fiber. Using honeycomb as the matching dielectric layer, microscopic characterization of carbon fiber distribution in carbon fiber
YUAN Xujiong +7 more
doaj +1 more source