Results 11 to 20 of about 22,322 (302)

On partial geometries arising from maximal arcs [PDF]

open access: yesJournal of Algebraic Combinatorics, 2021
The subject of this paper are partial geometries $pg(s,t,α)$ with parameters $s=d(d'-1), \ t=d'(d-1), \ α=(d-1)(d'-1)$, $d, d' \ge 2$. In all known examples, $q=dd'$ is a power of 2 and the partial geometry arises from a maximal arc of degree $d$ or $d'$ in a projective plane of order $q$ via a known construction due to Thas \cite{Thas73} and Wallis ...
Mustafa Gezek, Vladimir D. Tonchev
openaire   +3 more sources

Greenberg Approximation and the Geometry of Arc Spaces [PDF]

open access: yesCommunications in Algebra, 2010
We study the differential properties of generalized arc schemes, and geometric versions of Kolchin's Irreducibility Theorem over arbitrary base fields. As an intermediate step, we prove an approximation result for arcs by algebraic curves.
Nicaise, Johannes, Sebag, Julien
openaire   +5 more sources

Geometrical Relations Between Slab Dip and the Location of Volcanic Arcs and Back‐Arc Spreading Centers

open access: yesGeochemistry, Geophysics, Geosystems, 2023
A global study of subduction zone dynamics indicates that the thermal structure of the overriding plate may control arc location. A fast convergence rate and a steep slab dip bring a hotter mantle further into the wedge corner, forming arc volcanoes ...
Goeun Ha   +2 more
doaj   +1 more source

Experimental and Numerical Analysis on TIG Arc Welding of Stainless Steel Using RSM Approach

open access: yesMetals, 2021
This study involves the validating of thermal analysis during TIG Arc welding of 1.4418 steel using finite element analyses (FEA) with experimental approaches.
Sasan Sattarpanah Karganroudi   +6 more
doaj   +1 more source

Arcs and ovals in infinite {$K$}-clan geometry [PDF]

open access: yesBulletin of the Belgian Mathematical Society - Simon Stevin, 1998
Let \(F=GF(q)\) be the Galois field with \(q\) elements. A \(q\)-clan is a set \({\mathcal C}\) of \(q\), \(2\times 2\) matrices over \(F\) whose pairwise differences are anisotropic, i.e., define quadratic forms that represent 0 only trivially. Associated with a \(q\)-clan \({\mathcal C}\) is a flock \({\mathcal F}({\mathcal C})\) of a quadratic cone ...
Bader, Laura, O'Keefe, Christine M.
openaire   +5 more sources

Process Control Methods in Cold Wire Gas Metal Arc Additive Manufacturing

open access: yesMetals, 2023
Cold wire gas metal arc (CWGMA) additive manufacturing (AM) is more productive and beneficial than the common electric arc processes currently used in wire arc additive manufacturing (WAAM).
João B. Bento   +3 more
doaj   +1 more source

Gravity modelling of the Tyrrhenian-Calabrian-Ionian subduction system

open access: yesFrontiers in Earth Science, 2023
This study provides a lithospheric-scale model along the Ionian Subduction zone in Southern Italy, contributing to the seismotectonic investigation of a region which is affected by relevant historical seismicity.
A. Akimbekova   +7 more
doaj   +1 more source

Comparison of Properties and Bead Geometry in MIG and CMT Single Layer Samples for WAAM Applications

open access: yesMetals, 2021
The process of Wire Arc Additive Manufacturing (WAAM) utilizes arc welding technology to fabricate metallic components by depositing material in a selective layered fashion.
Harley Stinson   +3 more
doaj   +1 more source

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