Results 131 to 140 of about 771,659 (382)
Microlens Parallax Asymmetries Toward the LMC [PDF]
, 1998 If the microlensing events now being detected toward the Large Magellanic Cloud (LMC) are due to lenses in the Milky Way halo, then the events should typically have asymmetries of order 1% due to parallax from the reflex motion of the Earth. By contrast,
Andrew Gould +6 more
core +3 more sources
The Refractometry of Lenses [PDF]
Nature, 1916 IT may be of value to opticians and others to know of a method by which the refractive indices of irregular or unpolished pieces of glass, lenses, or prisms, can be found fairly accurately—i.e. to 1 in the fourth decimal place.
openaire +3 more sources
A Wireless Optogenetic Headstage with Multichannel Electrophysiological Recording Capability
Sensors, 2015 We present a small and lightweight fully wireless optogenetic headstage capable of optical neural stimulation and electrophysiological recording. The headstage is suitable for conducting experiments with small transgenic rodents, and features two ...
Gabriel Gagnon-Turcotte +10 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar +3 more
wiley +1 more source
A seven square degrees survey for galaxy-scale gravitational lenses with the HST imaging archive
, 2014 We present the results of a visual search for galaxy-scale gravitational lenses in nearly 7 square degrees of Hubble Space Telescope (HST) images. The dataset comprises the whole imaging data ever taken with the Advanced Camera for Surveys (ACS) in the ...
Alard +42 more
core +1 more source
Proceedings of the National Academy of Sciences, 2013 Since Galileo, the arrays of lenses in telescopes have revolutionized the way we see planets, moons, and the universe. Now gravitational lenses made of warped spacetime are helping astronomers peer into the farthest corners of the cosmos.
openaire +2 more sources
Lensing point-spread function of coherent astrophysical sources and non-trivial wave effects [PDF]
2024 ApJ 975 79Most research on astrophysical lensing has been conducted using the geometric optics framework, where there exists a clear concept of lensing images. However, wave optics effects can be important for coherent sources, e.g. pulsars, fast raio bursts, and gravitational waves observed at long wavelengths.
arxiv +1 more source
Scalable Fabrication of Height‐Variable Microstructures with a Revised Wetting Model
Advanced Engineering Materials, EarlyView.Height‐variable microstructures are fabricated using a scalable CO2 laser machining approach, enabling precise control of wettability through structural gradients. Classical wetting models fail to capture height‐induced effects, necessitating a revised theoretical framework.
Prabuddha De Saram +2 more
wiley +1 more source
Multiple imaging by gravitational waves [PDF]
, 1997 Gravitational waves act like lenses for the light propagating through them. This phenomenon is described using the vector formalism employed for ordinary gravitational lenses, which was proved to be applicable also to a non-stationary spacetime, with the
Braginsky V. B. +9 more
core +3 more sources
Advanced Engineering Materials, EarlyView.The influence of oxide nanoparticle synthesis route and concentration on microstructure and high‐temperature performance of additively manufactured oxide dispersion‐strengthened steels is investigated. Comparing laser‐generated and chemically synthesized ZrO2 nanoparticles, the study reveals how dispersion quality, crystal structure and particle size ...
Mareen Goßling +12 more
wiley +1 more source