Results 31 to 40 of about 2,188,732 (293)

Attenuation laws for galaxies with different star formation histories, based on the SDSS images [PDF]

open access: yesSerbian Astronomical Journal, 2009
Attenuation curves (laws) in the optical part of the spectrum (from about 3500 A to 9000 A) are determined for galaxies with different star formation histories (SFHs) using images in five photometrical bands from the Sloan Digital Sky Survey (SDSS ...
Vince O.
doaj   +1 more source

MCNP simulation of X-ray beam for a 15 MV medical linear accelerator

open access: yesHe jishu, 2021
BackgroundThe application of high-energy medical electron accelerators in the radiotherapy becomes more and more widespread. Study of the radiation source and shielding of high-energy medical electron accelerators has been the focus of attention ...
DENG Lei   +7 more
doaj   +1 more source

On the spectrum of sizes of semiovals contained in the Hermitian curve

open access: yesEuropean Journal of Combinatorics, 2016
Some constructions and bounds on the sizes of semiovals contained in the Hermitian curve are given. A construction of an infinite family of 2-blocking sets of the Hermitian curve is also presented.
BARTOLI, DANIELE   +3 more
openaire   +5 more sources

On the spectrum of genera of quotients of the Hermitian curve [PDF]

open access: yesCommunications in Algebra, 2018
We investigate the genera of quotient curves $\mathcal H_q/G$ of the $\mathbb F_{q^2}$-maximal Hermitian curve $\mathcal H_q$, where $G$ is contained in the maximal subgroup $\mathcal M_q\leq{\rm Aut}(\mathcal H_q)$ fixing a pole-polar pair $(P,\ell)$ with respect to the unitary polarity associated with $\mathcal H_q$.
Montanucci M., Zini G.
openaire   +2 more sources

Automatic Extraction of Surface Wave Dispersion Curves Using Unsupervised Learning and High‐Resolution Tau‐p Transform

open access: yesEarth and Space Science, 2023
Dispersion curves for surface wave recordings are required input for many surface wave inversion methods to image subsurface shear wave velocity distribution, while the conventional extraction of dispersion curves requires significant amount of human ...
Hai Yao   +4 more
doaj   +1 more source

Residual stiffness characterization of FRP laminates under random block spectrum

open access: yesPolymer Testing, 2021
The fiber reinforced polymer/plastic (FRP) laminates are often subjected to random block spectrum loading in engineering. The simplified regular load in the laboratory fatigue tests is not sufficient to describe the actual fatigue damage history of FRP ...
Piao Li   +3 more
doaj   +1 more source

Infinitely many new curves of the Fučík spectrum

open access: yesAnnales de l'Institut Henri Poincaré C, Analyse non linéaire, 2015
In this paper we present some results on the Fučík spectrum for the Laplace operator, that give new information on its structure. In particular, these results show that, if Ω is a bounded domain of \mathbb{R}^{N} with
Riccardo Molle, PASSASEO, Donato
openaire   +3 more sources

Seismic fragility curves for integral concrete bridge in Bulgaria [PDF]

open access: yesGrađevinski Materijali i Konstrukcije
The determination of seismic behavior is a major issue concerning civil engineers nowadays. The development of computer systems has led to an increasing use of various analytical approaches for determining the seismic response of buildings and structures.
Iliev Alexander, Stefanov Dimitar
doaj   +1 more source

Machine learning and algebraic approaches towards complete matter spectra in 4d F-theory

open access: yesJournal of High Energy Physics, 2021
Motivated by engineering vector-like (Higgs) pairs in the spectrum of 4d F-theory compactifications, we combine machine learning and algebraic geometry techniques to analyze line bundle cohomologies on families of holomorphic curves. To quantify jumps of
Martin Bies   +5 more
doaj   +1 more source

Investigation of a discrete Sturm–Liouville problem with two-point nonlocal boundary condition and natural approximation of a derivative in boundary condition

open access: yesMathematical Modelling and Analysis
The article investigates a discrete Sturm–Liouville problem with one natural boundary condition and another nonlocal two-point boundary condition. We analyze zeroes, poles and critical points of the characteristic function and how the properties of this
Kristina Bingelė, Artūras Štikonas
doaj   +1 more source

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