Results 111 to 120 of about 113,373 (284)

spTest: An R Package Implementing Nonparametric Tests of Isotropy

Journal of Statistical Software, 2018
An important step in modeling spatially-referenced data is appropriately specifying the second order properties of the random field. A scientist developing a model for spatial data has a number of options regarding the nature of the dependence between ...
Zachary D. Weller
doaj   +1 more source

A method for reconstructing the variance of a 3D physical field from 2D observations: Application to turbulence in the ISM

, 2010
We introduce and test an expression for calculating the variance of a physical field in three dimensions using only information contained in the two-dimensional projection of the field. The method is general but assumes statistical isotropy.
Bensch, Bouchut, Bouchut, Brunt, Brunt, Brunt, Brunt, C. Federrath, C. M. Brunt, D. J. Price, Elmegreen, Federrath, Federrath, Fryxell, Goodman, Hennebelle, Hennebelle, Heyer, Klingenberg, Krumholz, Lazarian, Lucy, Mac Low, Miville-Deschenes, Ostriker, Padoan, Padoan, Padoan, Passot, Price, Price, Reblinsky, Stutzki, Vestuto, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Waagan   +37 more
core   +1 more source

Isotropy of Algebraic Theories

Mathematical Foundations of Programming Semantics, 2018
To every small category or topos one may associate its isotropy group, which is an algebraic invariant capturing information about the behaviour of automorphisms.
Pieter J. W. Hofstra, Jason Parker, P. Scott   +2 more
semanticscholar   +1 more source

Evaluating Energy Absorption Performance of Filled Lattice Structures

Advanced Engineering Materials, EarlyView.
Maximum stress must be considered to robustly evaluate energy absorber designs. This approach was applied to compare all types of absorbers in a single Ashby diagram and determine the utility of filling lattice voids with a second material. High‐performance fillers can improve the performance of lattices that are limited by buckling or catastrophic ...
Christian Bonney, William P. King, Iwona Jasiuk   +2 more
wiley   +1 more source

ISOTROPY ANALYSIS OF METAMATERIALS

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2015
Metamaterials – artificial periodic structures with subwavelength feature sizes – can be characterized with macroscopic electromagnetic properties, like refractive index and wave impedance, just like homogeneous materials.
Arnold Kalvach, Zsolt Szabó
doaj   +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

Numerical Modeling of Tank Cars Carrying Hazardous Materials With and Without Composite Metal Foam

Advanced Engineering Materials, EarlyView.
Large‐scale puncture models consisting of hazardous materials (HAZMATs) tank car with protective steel–steel composite metal foam (S–S CMF) are solved numerically. Tank car plate with added 10.91–13.33 mm thick S–S CMF layer does not puncture. Protective S–S CMF absorbs impact energy, reduces plate deformation, and prevents shear bands formation ...
Aman Kaushik, Afsaneh Rabiei
wiley   +1 more source

Achieving uniform hardness in additively manufactured TA15 alloy via Ni or Cu additions

Materials Research Letters
The coarse columnar grains that typically occur during additive manufacturing introduce mechanical anisotropy. Both to achieve a columnar-to-equiaxed transition (CET) and to investigate the effects of high growth restriction factor elements on the ...
Leyu Cai, Yaojia Ren, Xinyan Liu, Min Song, Ian Baker, Hong Wu   +5 more
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Numerical Exploration of Thermal Shock Resistance in MgO–C Refractories

Advanced Engineering Materials, EarlyView.
A mesostructure‐resolved numerical framework is developed to evaluate the thermal shock resistance of MgO–C refractories. By modeling interface debonding under rapid temperature changes and introducing a modified thermal shock parameter that accounts for mesocracks, the study shows how graphite content and aggregate size influence thermal shock ...
Jishnu Vinayak Gopi, Stephan Roth, Christos G. Aneziris, Bjoern Kiefer   +3 more
wiley   +1 more source