Results 241 to 250 of about 307,407 (286)

Review on Uniaxial Negative Thermal Expansion of Tr‐Zr Superconductors

open access: yesMetalMat, EarlyView.
In this paper, we review recent research progress of a study of uniaxial negative thermal expansion (NTE) along the c‐axis with transition (Tr) metal zirconide TrZr2 and TrZr3 superconductors. We introduce the unique thermal expansion properties of TrZr2 and TrZr3 and the flexibility of controlling thermal expansion properties.
Yuto Watanabe, Yoshikazu Mizuguchi
wiley   +1 more source

Local environment and sampling bias drive parasite prevalence estimates in freshwater fish communities

open access: yesOikos, EarlyView.
Parasite occurrence and infection estimates vary through time and space, making understanding the underlying drivers highly complex. Comparative studies based on empirical data must consider the factors of variation involved in estimating infection metrics in natural populations to make appropriate and reliable comparisons. Using a multi‐scale approach,
Juliane Vigneault   +2 more
wiley   +1 more source

Sustainable two‐step functionalization of carbon fibers (CFs) with polyethyleneimine and investigation of curing kinetics in composite materials

open access: yesPolymer Composites, EarlyView.
We followed the functionalization steps outlined in the figure to obtain carbon fibers (CFs) functionalized with branched polyethyleneimine (b‐PEI). The entire process was carried out under mild conditions, including plasma activation and low‐temperature heating, using an eco‐friendly solvent (water).
Edoardo Albertini   +7 more
wiley   +1 more source

Performance analysis of solid‐state shear milling of plastic particles

open access: yesPolymer Engineering &Science, EarlyView.
Solid State Shear (S3M) Milling of Plastic Particles: Flow Features and Particles Size Reduction. Abstract The paper presents an analysis of plastic particles flow and breakage in a solid‐state shear mill (S3M). This mill resembles the traditional stone mill used for flour milling. Particle flow and their breakage are modeled as being the result of the
H. Benkreira   +9 more
wiley   +1 more source

Computational Study for Structures and Electronic Properties of (RhAl)2O3 and (RhGa)2O3 Alloys for Optimal p‐Type Heterostructures in Group‐III Sesquioxides

open access: yesphysica status solidi (b), EarlyView.
Schematics of calculated alignments of the valence band maximum (VBM) and conduction band minimum (in eV) for α‐Al2O3, α‐Ga2O3, α‐Rh2O3, and α‐(Rh0.54Al0.46)2O3, β‐(Al0.5Ga0.5)2O3, and β‐(Rh0.25Al0.75)2O3 alloys obtained by hybrid density functional calculations are presented. The zero of energy axis is set to the VBM of α‐Al2O3.
Kenta Matsubara   +2 more
wiley   +1 more source

Anticlastic Curvature and Material Freedom

open access: yesphysica status solidi (b), EarlyView.
Anticlastic curvature occurs in bent bars for positive Poisson's ratio; synclastic curvature occurs for negative Poisson's ratio provided the material is homogeneous and elastic. Some planar negative Poisson's ratio materials exhibit anticlastic saddle curvature rather than convex curvature in bending due to effects of 3D structure.
Roderic Lakes
wiley   +1 more source

A System of Degenerate Parabolic Equations

SIAM Journal on Mathematical Analysis, 1990
The system of two nonlinear equations which arises in plasma physics is considered. The equations are of degenerate parabolic type. The global existence theorem for the Cauchy problem is proved. The proof is based on the Lagrangian transformation, thus using a particular structure of the system.
BERTSCH, MICHIEL, Kamin, S.
openaire   +3 more sources

Nonuniqueness of solutions of a degenerate parabolic equation

Annali di Matematica Pura ed Applicata (1923 -), 1992
We give some results about nonuniqueness of the solutions of the Cauchy problem for a class of nonlinear degenerate parabolic equations arising in several applications in biology and physics. This phenomenon is a truly nonlinear one and occurs because of the degeneracy of the equation at the points where u=0.
BERTSCH, MICHIEL, Dal Passo, R, Ughi, M.
openaire   +5 more sources

Degenerate and Singular Parabolic Equations [PDF]

open access: possible, 2011
Let E be an open set in \(\mathbb{R}^{N}\) and for T > 0 let E T denote the cylindrical domain E × (0, T].
Emmanuele DiBenedetto   +2 more
openaire   +1 more source

Home - About - Disclaimer - Privacy