Results 51 to 60 of about 60,869 (311)
King and Cochrane: The technological treadmill and racial inequity in US agriculture
Applied Economic Perspectives and Policy, EarlyView.Abstract Between 1920 and 1969, the number of Black farmers in the US decreased from 14% of all operators to 4%. Using Martin Luther King Jr.'s critique of agricultural policy and Willard Cochrane's theory of the technological treadmill, we explore how racial discrimination was linked to policies that led to structural change in US agriculture.
Jared Hutchins, Jacopo De Marinis
wiley +1 more source
Electronic Journal of Differential Equations, 2011 We obtain the existence and multiplicity of positive $T$-periodic solutions for the difference equations $$ Delta x(n)=a(n,x(n))-lambda b(n)f(x(n-au(n))) $$ and $$ Delta x(n)+a(n,x(n))=lambda b(n)f(x(n-au(n))), $$ where $f(cdot)$ may be singular
Yanqiong Lu
doaj
Advanced Energy and Sustainability Research, EarlyView.This article examines strategies to enhance the sustainability of battery systems in renewable energy through circular economy principles. It discusses recycling techniques, modular battery design, second‐life utilization, and regulatory frameworks. Key barriers include inadequate infrastructure and regulatory gaps.
Williams Chibueze Munonye +5 more
wiley +1 more source
Liouville-type theorems for elliptic Schrödinger systems associated with copositive matrices
Networks and Heterogeneous Media, 2012 We study non-cooperative, multi-component elliptic Schrödinger systems arising in nonlinear optics and Bose-Einstein condensation phenomena.We here reconsider the more delicate case of systems of $m ≥ 3$ components.We prove a Liouville-type nonexistence ...
Philippe Souplet
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A nonexistence result for the Kurzweil integral [PDF]
Mathematica Bohemica, 2002 Summary: It is shown that there exist a continuous function \(f\) and a regulated function \(g\) defined on the interval \([0,1]\) such that \(g\) vanishes everywhere except for a countable set, and the \(K^*\)-integral of \(f\) with respect to \(g\) does not exist.
Jaroslav Kurzweil, Pavel Krejčí
openaire +2 more sources
Agribusiness, EarlyView.Abstract Nucleus outgrower schemes are contractual arrangements where well‐resourced large‐scale farmers (nucleus farmers) are empowered by development support agencies to take charge of smallholder farmers, by providing them with market access and the necessary training on agronomic practices and farm inputs for production.
Dominic Tasila Konja, Awudu Abdulai
wiley +1 more source
Nonexistence theorems for traversable wormholes
, 1999 Gauss-Bonnet formula is used to derive a new and simple theorem of nonexistence of vacuum static nonsingular lorentzian wormholes. We also derive simple proofs for the nonexistence of lorentzian wormhole solutions for some classes of static matter such ...
Agnese A. G. +5 more
core +2 more sources
Advanced Intelligent Discovery, EarlyView.Combining machine learning and probabilistic statistical learning is a powerful way to discover and design new materials. A variety of machine learning approaches can be used to identify promising candidates for target applications, and causal inference can help identify potential ways to make them a reality.
Jonathan Y. C. Ting, Amanda S. Barnard
wiley +1 more source
Nonexistence results of solutions for some fractional $p$-Laplacian equations in $\mathbb{R}^{N}$
Electronic Journal of Qualitative Theory of Differential EquationsIn the present paper, we study the nonexistence of nontrivial weak solutions to a class of fractional $p$-Laplacian equation in two cases which are $sp > N$ and $sp < N$.
Yuxin Chen, Haidong Liu
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Analiza i Egzystencja, 2016 CAN EXISTENCE BE BETTER OR WORSE THAN NONEXISTENCE? PART I The aim of this paper is to examine whether there is any possibility to compare thevalue of someone’s existence with his nonexistence.
Mirosław Rutkowski
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