Results 101 to 110 of about 5,925 (246)

Fast optical variability in supergiant X-ray binaries

Context. Recent studies of massive stars using high-precision space photometry have revealed that they commonly exhibit stochastic low-frequency variability. Aims.
D. Di Filippantonio, J. Fabregat, P. Reig   +2 more
core   +1 more source

Probing the composition of sub-millisecond rotating compact stars by r-modes instability

, 2012
We investigate the implications of the r-modes instability on the composition of a compact star rotating at a sub-millisecond period. In particular, the only viable astrophysical scenario for such an object, wich might present inside the Low Mass X-ray ...
Giuseppe Pagliara, Drago, Alessandro, Alessandro Drago, Pagliara, Giuseppe   +3 more
core   +1 more source

A Knowledge‐Based Approach for Understanding and Managing Additive Manufacturing Data

Advanced Engineering Materials, EarlyView.
Additive manufacturing processes generate a large amount of data. Effectively managing, understanding, and retrieving information from this data remains a major challenge. Therefore, we propose an ontology‐based approach to integrate heterogeneous data, enable semantic queries, and support decision‐making.
Mina Abd Nikooie Pour, Prithwish Tarafder, Anton Wiberg, Huanyu Li, Johan Moverare, Patrick Lambrix   +5 more
wiley   +1 more source

Creating Ti–Fe α/β Alloys by Diffusion‐Driven Solid‐State Processing

Advanced Engineering Materials, EarlyView.
This study proposes making alloys containing fast diffusing elements that are difficult to produce by ingot metallurgy, by diffusion‐driven solid‐state HIP processing of elemental powders and low‐temperature homogenisation. Here, novel Fe‐Ti α–β alloys are formed having fine α–β lamellae, a small β prior grain size without significant intermetallics ...
Jiaqi Xu, Xun Zhang, Jack M. Donoghue, Albert D. Smith, Rahul Unnikrishnan, Rhys Thomas, Vahid Nekouie, Jie Luo, Dongchen Hu, Michael Preuss, Philip J. Withers   +10 more
wiley   +1 more source

Sizing up the population of gamma-ray binaries

, 2017
International audienceContext. Gamma-ray binaries are thought to be composed of a young pulsar in orbit around a massive O or Be star with their gamma-ray emission powered by pulsar spin-down.
Martin, Pierrick, Dubus, Guillaume, Guillaume Dubus, Pierre-Olivier Petrucci, Nicolas Guillard, Guillard, Nicolas, Pierrick Martin, Petrucci, Pierre-Olivier   +7 more
core   +1 more source

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

Advanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov, Oleksandr Bobukh, Christian Klose, Florian Nürnberger, Hans Jürgen Maier   +4 more
wiley   +1 more source

A General Extension Theorem for Binary Relations

Journal of Economic Theory, 1999
First a lot of properties (besides the generally known) for binary relations \(B\) on a set \(X\) are defined: Let \(\Delta\) be the identity relation on \(X\) and \(T_B\) the transitive closure of \(B\), \(B^-:=(X\times X)\setminus B\), \(B^{-1}: =\{(y,x) |(x,y)\in B\}\); \(P_B:= B\setminus B^{-1}\) is called the asymmetric part of \(B\).
openaire   +2 more sources

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Periastron advance in black hole binaries

, 2011
The general relativistic (Mercury-type) periastron advance is calculated here for the first time with exquisite precision in full general relativity. We use accurate numerical relativity simulations of spinless black-hole binaries with mass ratios 1/8?m1/
Mroué, A., Sago, Norichika, Barack, Leor, Tiec, A., Abdul H. Mroué, Pfeiffer, Harald P., Barack, L., Buonanno, Alessandra, Norichika Sago, Mroué, Abdul H., Pfeiffer, H., Le Tiec, Alexandre, Buonanno, A., Harald P. Pfeiffer, Sago, N., Taracchini, Andrea, Alexandre Le Tiec, Andrea Taracchini, Leor Barack, Alessandra Buonanno, Taracchini, A.   +20 more
core   +1 more source

Two involutions on binary trees and generalizations

Advances in Applied Mathematics
This paper investigates two involutions on binary trees. One is the mirror symmetry of binary trees which combined with the classical bijection $φ$ between binary trees and plane trees answers an open problem posed by Bai and Chen. This involution can be generalized to weakly increasing trees, which admits to merge two recent equidistributions found by
Yang Li, Zhicong Lin, Tongyuan Zhao
openaire   +3 more sources