19 papers · ranked by Valyu relevance
Dorothea Golze, Marc Dvorak, Patrick Rinke
The GW approximation in electronic structure theory has become a widespread tool for predicting electronic excitations in chemical compounds and materials. In the realm of theoretical spectroscopy, the GW method provides access to charged excitations as measured in direct or inverse photoemission spectroscopy. The…
Jerrold Franklin
Green's functions for Neumann boundary conditions have been considered in Math Physics and Electromagnetism textbooks, but special constraints and other properties required for Neumann boundary conditions have generally not been noticed or treated correctly. In this paper, we derive an appropriate Neumann Green's…
Caio Lewenkopf, Eduardo R. Mucciolo
We describe how to apply the recursive Green's function method to the computation of electronic transport properties of graphene sheets and nanoribbons in the linear response regime. This method allows for an amenable inclusion of several disorder mechanisms at the microscopic level, as well as inhomogeneous gating…
Markus Rosenkranz, Nitin Serwa
Stieltjes boundary problems generalize the customary class of well-posed two-point boundary value problems in three independent directions, regarding the specification of the boundary conditions: (1) They allow more than two evaluation points. (2) They allow derivatives of arbitrary order. (3) Global terms in the form…
Priya Priya, Mainak Sadhukhan
The quest for an approximate yet accurate kinetic energy density functional is central to the development of orbital-free density functional theory. While a recipe for closed-shell systems has been proposed earlier, we have shown that it cannot be naively extended to open-shell atoms. In this present work, we…
Brahim Ben Ali, Mohammed Tayeb Meftah
In this work, we present a new result which concerns the derivation of the Green function relative to the time-independent Schrodinger equation in two dimensional space. The system considered in this work is a quantum particle that have an energy E and moves in an axi- symmetrical potential. Precisely, we have assumed…
Srinivasarao Thota
Objectives In this paper, we present and employ symbolic Maple software algorithm for solving initial value problems (IVPs) of partial differential equations (PDEs). From the literature, the proposed algorithm exhibited a great significant in solving partial differential equation arises in applied sciences and…
Alberto Cabada, P. Franco
arguments Authors: ['Alberto Cabada' 'P. Franco'] In this work, we study nonlocal differential equations with particular focus on those with reflection in their argument and piecewise constant dependence. The approach entails deriving the explicit expression of the solution to the linear problem by constructing the…
Muhammad Adil Khan, Arshad Iqbal, Muhammad Suleman, Yu-Ming Chu
In the article, we establish the left Riemann-Liouville fractional Hermite-Hadamard type inequalities and the generalized Hermite-Hadamard type inequalities by using Green’s function and Jensen’s inequality, and present several new Hermite-Hadamard type inequalities for a class of convex as well as monotone functions.
Gianluca Tirimbo, Vivek Sundaram, Björn Baumeier
Many-body Green's function theory in the GW approximation with the Bethe--Salpeter equation (BSE) provides a powerful framework for the first-principles calculations of single-particle and electron-hole excitations in perfect crystals and molecules alike. Application to complex molecular systems, e.g., solvated dyes…
Alexander Domoshnitsky, Irina Volinsky
The impulsive delay differential equation is considered (Lx)(t) = x′(t) + ∑i=1mpi(t)x(t − τ*i(t)) = f(t), t ∈ [a, b], x(t**j) = βjx(t**j − 0), j = 1,…, k, a = t0 < t1 < t2 < ⋯<t**k < t**k+1 = b, x(ζ) = 0, ζ ∉ [a, b], with nonlocal boundary condition lx = ∫abφ(s)x′(s)ds + θx(a) = c, φ ∈ L**∞[a, b]; θ, c ∈ R*. Various…
Giacomo Po, Nikhil Chandra Admal, Markus Lazar
We derive the Green tensor of Mindlin's anisotropic first strain gradient elasticity. The Green tensor is valid for arbitrary anisotropic materials, with up to 21 elastic constants and 171 gradient elastic constants in the general case of triclinic media. In contrast to its classical counterpart, the Green tensor is…
Shou-Qing Jia
The finite difference time domain (FDTD) algorithm and Green function algorithm are implemented into the numerical simulation of electromagnetic scattering by ordinary objects in Schwarzschild space-time. FDTD method in curved space-time is developed by filling the flat space-time with an equivalent medium. Green…
Javier Pacheco-Labrador, Tarek S. El-Madany, Christiaan van der Tol, M. Pilar Martin + 7 more
Semi-arid grasslands and other ecosystems combine green and senescent leaves featuring different biochemical and optical properties, as well as functional traits. Knowing how these properties vary is necessary to understand the functioning of these ecosystems. However, differences between green and senescent leaves are…
Eric P. Knoshaug, Peipei Sun, Ambarish Nag, Huong Nguyen + 8 more
An explosion of sequenced genomes and predicted proteomes enabled by low cost deep sequencing has revolutionized biology. Unfortunately, protein functional annotation is more complex, and has not kept pace with the sequencing revolution. We identified unannotated proteins in three model organisms representing distinct…
Beenish Khan Khattak, Afshan Naseem, Mehran Ullah, Muhammad Imran + 2 more
'Sami El Ferik' 'Ashkan Memari'] The need for environmental protection and involvement of ecological aspects in the business operations is forcing the organizations to re-examine their action plans and rebuild their supply chain activities. Many organizations are incorporating environmental rules and regulations in…
Kiran Patil
The environmental and climate issues facing across the world are widely recognized as serious problems. Therefore, green technologies and ecological sustainable development is need of the hour as the quality of life is worsening. We have had major progress in technology causing depletion of natural life sustaining…
John Erik Vanston, Alexandra E. Boehm, William S. Tuten, Austin Roorda
When single cones are stimulated with spots of 543-nm light presented against a white background, subjects report percepts that vary between predominately red, white, and green. However, light of the same spectral composition viewed over a large field under normal viewing conditions looks invariably green and highly…
Justin Chalker, Rumana Hossain, Veena Sahajwalla
The principles of Green Chemistry and Engineering were formalised more than 20 years ago to guide us toward a safe and sustainable future. This framework is as important as ever in the development of chemical technologies that support human well-being while addressing the complex challenges we face in sustainability.…