Results 81 to 90 of about 237,124 (270)

Duality and Effective Conductivity of Two-dimensional Two-phase Systems

, 2002
The possible functional forms of the effective conductivity sigma_{eff} of the randomly inhomogeneous two-phase system at arbitrary values of concentrations are discussed.
Anderson, Baxter, Bruggeman, Bulgadaev, Dykhne, Keller, Kirkpatrick, Kirkpatrick, Landauer, Luck, S.A. Bulgadaev, Shklovskii   +11 more
core   +1 more source

An Abstract Nonlinear Temporally Inhomogeneous Equation

Demonstratio Mathematica, 1990
One considers the abstract semi-linear initial value problem (1) \(du/dt=A(t)u+f(t,u)\), \(t\in[0,T]\), \(u(0)=u_ 0\), where \(X\) is a real reflexive Banach space and, for any \(t\in[0,T]\), \(A(t): X\to X\) a closed densely defined linear operator, \(f: \mathbb{R}\times X\to X\) a nonlinear function and \(u_ 0\in X\).
openaire   +1 more source

Unprecedented Spin‐Lifetime of Itinerant Electrons in Natural Graphite Crystals

Advanced Functional Materials, EarlyView.
Graphite exhibits extraordinary spintronic potential, with electron spin lifetimes reaching 1,000 ns at room temperature ‐ over 100 times longer than graphene‐based devices. Magnetic resonance spectroscopy reveals strong anisotropy: out‐of‐plane spins live 50 times longer than their in‐plane counterparts.
Bence G. Márkus, Dávid Beke, Lili Vajtai, András Jánossy, László Forró, Ferenc Simon   +5 more
wiley   +1 more source

Construction of 3D wormhole supported by phantom energy

, 2007
In this article, we have found a series solution of 3D Einstein equations describing a wormhole for an inhomogeneous distribution of phantom energy. Here, we assume equation of state is linear but highly anistropic.Comment: 9 papge, 4 figures.
Alcubierre M, B C Bhui, Carmelli M, F Rahaman, Ford L, Grant A, Ida D, M Kalam, Mansouryar M, Rahaman F, Rahaman F, Rahaman F, S Chakraborty, Visser M   +13 more
core   +1 more source

Growth of Millimeter‐Sized BaTaO2N Single Crystals by an NH3‐Assisted BaCl2 Flux Method

Advanced Functional Materials, EarlyView.
Millimeter‐sized BaTaO2N single crystals are successfully grown from a BaCl2 flux under NH3 flow. Their comprehensive characterization, including dielectric properties, is demonstrated, and the possible growth mechanisms are discussed. Abstract Perovskite‐type oxynitrides have attracted considerable attention due to their excellent photocatalytic ...
Ginji Harada, Mirabbos Hojamberdiev, Hajime Wagata   +2 more
wiley   +1 more source

Diffusion equations in inhomogeneous solid having arbitrary gradient concentration

Condensed Matter Physics, 2017
A quantum kinetic equation is obtained for an inhomogeneous solid having arbitrary gradient concentration and chemical potential. We find, starting from nonequilibrium statistical operator, a new equation to describe atom migration in solid states.
Y. Bilotsky, M. Gasik, B. Lev
doaj   +1 more source

Microsphere Autolithography—A Scalable Approach for Arbitrary Patterning of Dielectric Spheres

Advanced Functional Materials, EarlyView.
MicroSphere Autolithography (µSAL) enables scalable fabrication of patchy particles with customizable surface motifs. Focusing light through dielectric microspheres creates well defined, tunable patches via a conformal poly(dopamine) photoresist. Nearly arbitrary surface patterns can be achieved, with the resolution set by the index contrast between ...
Elliott D. Kunkel, Alec G. Burnett, Katherine E. Scheiber, Hans D. Robinson   +3 more
wiley   +1 more source

An integral equation method in the problem of electromagnetic wave propagation in a space filled with a locally inhomogeneous medium with a graphene layer at the boundary of the inhomogeneity region

Известия высших учебных заведений. Поволжский регион: Физико-математические науки
Background. The purpose of the study is to obtain a hybrid integro–differential equation in the case of an inhomogeneous volumetric graphene-covered obstacle to an electromagnetic wave. Material and methods.
Aleksey A. Tsupak
doaj   +1 more source

An equation for the limit state of a superconductor with pinning sites

Electronic Journal of Differential Equations, 2005
We study the limit state of the inhomogeneous Ginzburg-Landau model as the Ginzburg-Landau parameter $kappa=1/epsilono infty$, and derive an equation to describe the limit state.
Jianzhong Sun
doaj  

Solusi Persamaan keseimbangan Massa Reaktor Menggunakan Metode Pemisahan Variabel

Cauchy: Jurnal Matematika Murni dan Aplikasi, 2015
Mass balance of reactor equation express the change of mass concentration of substances in and out of the closed system. This equation has inhomogeneous boundary conditions, that is the conditions at the time of its entry to the reactor and the ...
Mohammad Syaiful Arif, Mohammad Jamhuri
doaj   +1 more source