Results 61 to 70 of about 288,588 (293)

Theory of Parabolic Arcs in Interstellar Scintillation Spectra

open access: yes, 2004
Our theory relates the secondary spectrum, the 2D power spectrum of the radio dynamic spectrum, to the scattered pulsar image in a thin scattering screen geometry.
Barney J. Rickett   +12 more
core   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

open access: yesAdvanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur   +5 more
wiley   +1 more source

Automatic detection of arcs and arclets formed by gravitational lensing

open access: yes, 2003
We present an algorithm developed particularly to detect gravitationally lensed arcs in clusters of galaxies. This algorithm is suited for automated surveys as well as individual arc detections.
Bartelmann   +16 more
core   +1 more source

Do Learning Styles Matter? Motivating Learners in an Augmented Geopark

open access: yesEducational Technology & Society, 2019
Augmented reality (AR) technology has recently been applied to outdoor learning in an attempt to overcome the drawbacks associated with traditional teaching environments.
Tien Chi Huang   +2 more
doaj  

On p-competition graphs of loopless Hamiltonian digraphs without symmetric arcs and graph operations

open access: yesTheory and Applications of Graphs, 2022
For a digraph $D$, the $p$-competition graph $C_{p}(D)$ of $D$ is the graph satisfying the following: $V(C_{p}(D))=V(D)$, for $x,y \in V(C_{p}(D))$, $xy \in E(C_{p}(D))$ if and only if there exist distinct $p$ vertices $v_{1},$ $v_{2},$ $...,$ $v_{p ...
Kuniharu Yokomura, Morimasa Tsuchiya
doaj   +1 more source

‘Acies’ and ‘Arces.’ [PDF]

open access: yesThe Classical Review, 1920
n ...
openaire   +2 more sources

Arc permutations [PDF]

open access: yesJournal of Algebraic Combinatorics, 2013
Updated with minor corrections reflecting referee comments.
Elizalde, Sergi, Roichman, Yuval
openaire   +2 more sources

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai   +2 more
wiley   +1 more source

New era towards autonomous additive manufacturing: a review of recent trends and future perspectives

open access: yesInternational Journal of Extreme Manufacturing
The additive manufacturing (AM) landscape has significantly transformed in alignment with Industry 4.0 principles, primarily driven by the integration of artificial intelligence (AI) and digital twins (DT).
Haolin Fan   +12 more
doaj   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira   +4 more
wiley   +1 more source

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