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Cryptosystem based on the elliptic curve with a high degree of resistance to damage on the encrypted images
2020
IEEE Access
Preserved Fulltext
image and the decrypted image with damage. ...
INDEX TERMS Elliptic curve, noise in encrypted images, chaos, S-box, median filter. ...
ACKNOWLEDGMENT The authors would like to thank the Instituto Politécnico Nacional of México (Secretaría Académica, Comisión de Operación y Fomento de Actividades Académicas COFAA, SIP, and CIDETEC), and ...
doi:10.1109/access.2020.3042475
fatcat:a5cr7uft3ngpzgit75vodcc65a
Strong Gravitational Lenses in a Cold Dark Matter Universe
[article]
2004
arXiv
pre-print
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evidence for the cold and collisionless dark matter. ...
We use two complementary statistics, lensed arcs and quasars, to probe the mass distributions. ...
We make color-color cuts based on the colors expected of elliptical galaxies (Fukugita et al. 1995) : g − r > 1.5, r − i > 0.7, and i − z > 0.2 for elliptical galaxies at z 0.5. ...
arXiv:astro-ph/0408573v1
fatcat:xy3d74hgyvdjhaomwahopkpjoi
First Steps Toward a Method for Estimating Cosmological Parameters using Strong Lensing, X-ray and Dynamics Total Mass Estimates
[article]
2017
arXiv
pre-print
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In addition to the replication of the Grillo et al. (2015) models, with two cluster scale halos and 175 circular cluster member mass-density profiles, we created models using elliptical mass-density profiles ...
for the cluster members and models where we optimize the cluster member scaling relation slopes. ...
The Fermat Potential The Fermat potential is one of the fundamental equations of gravitational lensing, and in some ways, a more proper approach to the lensing formalism [SKW06] . ...
arXiv:1703.02533v3
fatcat:cuxzmuigivah5a2g3f7vtyalka
Some exactly solvable models of urn process theory
2006
Discrete Mathematics & Theoretical Computer Science
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The corresponding generating functions are expressed in terms of certain Abelian integrals over curves of the Fermat type (which are also hypergeometric functions), together with their inverses. ...
International audience We establish a fundamental isomorphism between discrete-time balanced urn processes and certain ordinary differential systems, which are nonlinear, autonomous, and of a simple monomial ...
The authors are grateful to Philippe Chassaing, Yoshiaki Itoh, Nicolas Pouyanne, Philippe Robert, Aleksandar Sedoglavić, Brigitte Vallée, and Jacques-Arthur Weil for many stimulating discussions and valuable ...
doi:10.46298/dmtcs.3506
fatcat:lfx7327ncbb2lnuywwjro35kl4
On the inversion methods of strong gravitational lensing
2008
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The resulting model is able to reproduce, in detail, all the observed strong lensing features of this cluster, favors the NIS radial profile over NFW, and predicts an intriguing 5 arc sec shift between ...
center of the mass and the X-ray emission. ...
THEOREM. ...
doi:10.11588/heidok.00008121
fatcat:7dc6cehgbnghxeag4vcynk3qui
Deep Learning Gauss-Manin Connections
[article]
2020
arXiv
pre-print
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We train neural networks that can quickly and reliably guess the complexity of the Gauss-Manin connection of a pencil of hypersurfaces. ...
compute the periods of 96% of smooth quartic surfaces in projective 3-space whose defining equation is a sum of five monomials; from the periods of these quartic surfaces, we extract their Picard numbers and ...
Deep learning can be used to find elliptic fibrations [HL19] , to recognize isomorphism classes of groups and rings [HK19] , and for approximating the solutions of high-dimensional partial differential ...
arXiv:2007.13786v1
fatcat:cv2c35dalnazvldhao4mgslacy
Inversion of Love waves from ambient noise arrays: Application in the Mygdonia basin areaΑ
2019
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The Love wave group velocity maps depict the main 2-D basin features and the geometry of the outcropping bedrock is well resolved. ...
Also, the 3-D Vs model is in good correlation with independent geological, geophysical and geotechnical information. ...
The normal distribution fit is shown with red color and a kernel smoothed fit with blue color. The mean and standard deviation of the fitted Gaussian distribution are also given with red color. ...
doi:10.26262/heal.auth.ir.303721
fatcat:dud273bakjdqjbahx2jzzbktmu
Sparse Linear Inversion for Strong Gravitational Lenses Reconstruction, Component Separation from Morphological Component Analysis with Multiple Discrimination Criteria
2018
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Four years of doctoral studies rarely go smoothly and made me go through a lot of ups and downs, both personally and professionally. ...
These are extremely stimulating times and meeting fellow students, postdocs and professors has always made me want to be part of this community to keep exchanging and learning from you. ...
Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts. ...
doi:10.5075/epfl-thesis-8965
fatcat:krsxi5zdarfppcejxn4s4mtcni
Weak Gravitational Lensing by Large-Scale Structures:A Tool for Constraining Cosmology
2013
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We thank Tom Kitching for his help and especially for providing us with the true input ellipticity and FWHM catalog of the Star Challenge PSF images. ...
Many thanks to Tom Kitching for his help and for sharing the shear analysis code. We also thank the GREAT10 Coordination Team for organizing this stimulating challenge. ...
Quality factors per set for "gfit" (left) and "gfit den" (right). The various colors and patterns in the legend indicate the types of features simulated in the sets. ...
doi:10.5075/epfl-thesis-5732
fatcat:sqy3ossf55bp7kuntsyuuvk3le
Gravitational lensing constraints on cosmic structures
2007
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the virial theorem. ...
The dashed histogram shows the observational data. ...
I also thank him for carefully reading my manuscripts, my thesis and for kindly teaching me hystorical and scientific features of the physics world and of all its inhabitants. ...
doi:10.5167/uzh-163692
fatcat:ssn2vwcw2fagfll4wguqlhbsk4
Online) International Journal of Network Security is published both in traditional paper form (ISSN 1816-353X) and in Internet
2016
unpublished
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Acknowledgments This research was supported in part by the National Nature Science Foundation of China (grant number: 61202228) and the College Natural Science Key Project of Anhui Province of China (grant ...
and face dimensions in addition to the dress color and face color. ...
From the Fermat theorem, since gcd(α, p) = 1, we have α p−1 mod p = 1. Hence, for any nonnegative integer c, we have g cN mod p = (α (p−1)/N ) cN mod p == (α p−1 ) c mod p = 1. ...
fatcat:xjcy7wc2hzbhzl3bfxwniqvjhy
Online) International Journal of Network Security is published both in traditional paper form (ISSN 1816-353X) and in Internet
2017
International Journal of Network Security
unpublished
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Accordingly, we propose an enhanced scheme to remedy these security weaknesses, and prove that our scheme is more secure and efficient for network application with several positive properties. ...
s scheme, such as forward secrecy and the wrong password login problem, and proposed an enhanced user password authentication scheme based on smart card. However, we found weaknesses in their scheme. ...
), the 211 Project of Anhui University (Nos 33190187 and 17110099), and the Educational Commission of Anhui Province, China (KJ2015A326). ...
fatcat:nev5sh4gw5c45hffrl3qmchnzi
German Scientists and the Atom Bomb
1959
Science
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Newton “‘to discuss the validity of Kepler’s theory of elliptical orbits”; that “Galileo’s system” became Newton’s first and second laws! ...
Here the color may be compared with color standards or
20 FEBRUARY 1959
PORTABLE LABORATORY
In recent years, semi-micro techniques have gained increased popularity, par- ticularly in the analytical and ...
doi:10.1126/science.129.3347.438-c
fatcat:lujmi3nn4rdxvfndmaei72o7oe
Singularimetry: phase measurement using vortices and caustics
2017
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This thesis investigates singularimetry in both optical and matter wave fields. ...
Using theoretical ideas from singular wave optics, a proportionality between the transverse displacement of the vortices and the phase shift in the object wave was derived and experimentally tested. ...
The Bloch sphere image is a 2D histogram of φ and θ, each of which are calculated for every (x, y) point of the spin field. ...
doi:10.4225/03/58b6546f227d0
fatcat:vusnxb5b7fbwho7slekk2o5khm
Design of large polyphase filters in the Quadratic Residue Number System
2010
2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers
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an intensity histogram to sense objects of interest as a new additional fusion rule. ...
Many algorithms have been presented to correct bleed-through using grayscale and/or color images. ...
doi:10.1109/acssc.2010.5757589
fatcat:ccxnu5owr5fyrcjcqukumerueq
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