Results 1 to 10 of about 24,580 (311)

Greenberg Approximation and the Geometry of Arc Spaces [PDF]

open access: greenCommunications 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.
Johannes Nicaise, Julien Sebag
openalex   +6 more sources

Tensile strength of Co-Cr and Zr substructures on titanium abutments with different geometries [PDF]

open access: yesBMC Oral Health
Background This study aimed to evaluate the effects of different abutment geometries, abutment materials (Cobalt–Chromium and Zirconium), and cement types on the tensile strength of cement-retained implant-supported restorations in vitro. Methods A total
Zeynep Uzgur, Nihal Özcan, Saadet Atsü
doaj   +2 more sources

Autonomous Reactivity Control (ARC) — Principles, geometry and design process [PDF]

open access: greenNuclear Engineering and Design, 2016
The Autonomous Reactivity Control (ARC) system was developed to ensure inherent safety performance of Generation-IV reactors while having a minimal impact on reactor performance and economic viabil ...
Staffan Qvist   +5 more
openalex   +3 more sources

Lidar arc scan uncertainty reduction through scanning geometry optimization [PDF]

open access: yesAtmospheric Measurement Techniques, 2016
Doppler lidars are frequently operated in a mode referred to as arc scans, wherein the lidar beam scans across a sector with a fixed elevation angle and the resulting measurements are used to derive an estimate of the n minute horizontal mean wind ...
H. Wang   +3 more
doaj   +4 more sources

Numerical Investigation on Drag Reduction Mechanisms of Biomimetic Microstructure Surfaces [PDF]

open access: yesBiomimetics
Biomimetic microstructured surfaces offer a promising passive strategy for drag reduction in marine and aerospace applications. This study employs computational fluid dynamics (CFD) simulations to systematically investigate the drag reduction performance
Jiangpeng Liu   +4 more
doaj   +2 more sources

The geometry of $$(t\mod q)$$-arcs

open access: yesDesigns, Codes and Cryptography, 2023
Abstract In this paper, we give a geometric construction of the three strong non-lifted $$(3\mod 5)$$ ( 3 mod 5 )
Sascha Kurz   +3 more
openaire   +5 more sources

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

Application of Grey Relational Analysis for Optimizing Weld pool geometry parameters of Pulsed Current Micro Plasma Arc Welded AISI 304L stainless steel sheets [PDF]

open access: greenInternational Journal of Advanced Design and Manufacturing Technology, 2013
Pulsed Current Plasma Arc Welding (PCPAW) is one of the most widely used welding processes in sheet metal manufacturing industry. In any fusion arc welding process, the weld bead geometry plays an important role in determining the mechanical properties ...
SIVAPRASAD KONDAPALLI   +2 more
doaj   +1 more source

Prediction of deposition bead geometry in wire arc additive manufacturing using machine learning

open access: yesJournal of Materials Research and Technology, 2022
The deposition bead geometry in the arc strike zone is often abnormal compared with that in the middle deposition zone. The accumulation of these errors in the deposition process results in defects in the overall geometry of the deposition bead.
Won-Jung Oh   +2 more
doaj   +1 more source

Two gas metal arc welding process dataset of arc parameters and input parameters

open access: yesData in Brief, 2021
The dataset was collected from experiments using the gas metal arc welding (GMAW) process. The experiments were planned with Central Composite Design to obtain a greater variety of data.
Rogfel Thompson Martinez   +2 more
doaj   +1 more source

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