Results 51 to 60 of about 93,016 (319)

Strong gravitational lensing by multiple galaxies [PDF]

Mon.Not.Roy.Astron.Soc. 327 (2001) 339, 2001
We discuss strong gravitational lensing by multiple objects along any line of sight. The probability for strong gravitational lensing by more than one lens is small, but a number of strong lens systems in which more than one separate lens contribute significantly to the lensing potential will be detected in the large sample of lens systems compiled ...
arxiv   +1 more source

Electrospinning Technology, Machine Learning, and Control Approaches: A Review

Advanced Engineering Materials, EarlyView.
Electrospinning produces micro‐ and nanoscale fibers, holding great promise in biomedical engineering. Industrial adoption faces challenges in controlling fiber properties, reproducibility, and scalability. This review explores electrospinning techniques, modeling, and machine learning for process optimization.
Arya Shabani, Gorkem Anil Al, Nael Berri, Bernardo Castro‐Dominguez, Hannah S. Leese, Uriel Martinez‐Hernandez   +5 more
wiley   +1 more source

Exoplanet Searches by Future Deep Space Missions

EPJ Web of Conferences, 2011
The search for exoplanets could benefit from gravitational lensing if we could get to 550 AU from the Sun and beyond. This is because the gravitational lens of the Sun would highly intensify there any weak electromagnetic wave reaching the solar system ...
Maccone C.
doaj   +1 more source

IMAGES DISTRIBUTION OF BINARY SYMMETRICAL GRAVITATIONAL LENS

Odessa Astronomical Publications, 2019
In this paper, we study the distribu- tion of images from a point source in N - point gravi- tational lenses. It is well known that in a Schwarzschild lens (N = 1) from a point source, there are always two images.
A. T. Kotvytskiy, S. D. Bronza, V. Yu. Shablenko   +2 more
doaj   +1 more source

Exploring Quantum Geometry Created by Quantum Matter

Physics, 2022
Exactly soluble models can serve as excellent tools to explore conceptual issues in non-perturbative quantum gravity. In perturbative approaches, it is only the two radiative modes of the linearized gravitational field that are quantized.
Abhay Ashtekar
doaj   +1 more source

Galaxy mergers and gravitational lens statistics [PDF]

The Astrophysical Journal, 1994
We investigate the impact of hierarchical galaxy merging on the statistics of gravitational lensing of distant sources. Since no definite theoretical predictions for the merging history of luminous galaxies exist, we adopt a parametrized prescription, which allows us to adjust the expected number of pieces comprising a typical present galaxy at z=0.65.
Hans-Walter Rix, Edwin L. Turner, Dan Maoz, Masataka Fukugita   +3 more
openaire   +4 more sources

Roulette‐Inspired Physical Unclonable Functions: Stochastic yet Deterministic Multi‐Bit Patterning through the Solutal Marangoni Effect

Advanced Functional Materials, EarlyView.
Geometric multi‐bit patterning based on dynamic wetting and dewetting phenomena creates roulette‐like Physical Unclonable Function (PUF) labels with stochastic yet deterministic properties. This method leverages the solutal‐Marangoni effect for high randomness while achieving deterministic multinary patterns through polygonal confinement of binary ...
Yeongin Cho, Jeongsu Pyeon, Hanhwi Jang, Gwangsik Mun, Jaimin Kang, Byong‐Guk Park, Geon Yeong Kim, Hyoungsoo Kim, Yeon Sik Jung   +8 more
wiley   +1 more source

Polyacrylic Acid Copolymers as Adhesion‐Adapted Model Materials for Cleaning Tests

Macromolecular Chemistry and Physics, Volume 224, Issue 1, January 2023., 2023
Acrylic acid (AA) copolymers adhere physically to metallic surfaces and are used for production of layers which shall mimic real filmic contamination layers for cleaning tests. To further adjust the polymers to the reference contaminations the polarity of the copolymers is varied not only by the percentage of carboxy groups but also by additional ...
Susanne Höhne, Carolin Böhm, Vincent Eisenrauch, Christian Girsule, Enrico Fuchs, Marc Mauermann, Petra Uhlmann   +6 more
wiley   +1 more source

A Systematic Review of Strong Gravitational Lens Modeling Software [PDF]

, 2012
Despite expanding research activity in gravitational lens modeling, there is no particular software which is considered a standard. Much of the gravitational lens modeling software is written by individual investigators for their own use. Some gravitational lens modeling software is freely available for download but is widely variable with regard to ...
arxiv   +1 more source

Gravitational lens interference

The Astrophysical Journal, 1991
The consequence of the existence, when a lens is present, of two propagation paths from a source to the observer is investigated. Attention is focused on quasars as background sources; however, the results received are general and apply to pulsars and stellar sources as well. 12 refs.
Toby Falk, J. B. Peterson
openaire   +2 more sources