Results 51 to 60 of about 350,084 (285)
Modelling and Optimizing an Open-Pit Truck Scheduling Problem
Discrete Dynamics in Nature and Society, 2015 This paper addresses a special truck scheduling problem in the open-pit mine with different transport revenue consideration. A mixed integer programming model is formulated to define the problem clearly and a few valid inequalities are deduced to ...
Yonggang Chang, Huizhi Ren, Shijie Wang
doaj +1 more source
Valid inequalities for problems with additive variable upper bounds [PDF]
Mathematical Programming, 1999 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Atamtürk, Alper +2 more
openaire +2 more sources
The Power of Unity: Collective Action and Smallholder Agricultural Performance in West Africa
Agribusiness, EarlyView.ABSTRACT We analyze the impact of collective action through farmer‐based organizations (FBOs) on smallholders' farm performance and income inequality in Ghana, Benin, The Gambia, and Mali. We find that FBO membership increases cereal yield in Ghana and The Gambia, legume yield in Mali, ruminant numbers in Benin and The Gambia, and total farm income in ...
Emmanuel Donkor +3 more
wiley +1 more source
A note on the theorem on differential inequalities
Electronic Journal of Qualitative Theory of Differential Equations, 2005 It is proved that if a linear operator $\ell:C([a,b];\mathbb{R})\rightarrow L([a,b];\mathbb{R})$ is nonpositive and for the initial value problem $$u''(t)=\ell(u)(t)+q(t),\quad u(a)=c_1,\quad u'(a)=c_2 $$ the theorem on differential inequalities is valid,
H. Stepankova
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Local exclusion and Lieb-Thirring inequalities for intermediate and fractional statistics
, 2013 In one and two spatial dimensions there is a logical possibility for identical quantum particles different from bosons and fermions, obeying intermediate or fractional (anyon) statistics.
Lundholm, Douglas, Solovej, Jan Philip
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The Role of Certifications in Improving Household Food Security Among Peruvian Farmers
Agribusiness, EarlyView.ABSTRACT Achieving global food security requires sustainable transformations in agri‐food systems. Voluntary Sustainability Standards (VSS) such as Organic and Fairtrade aim to internalize certain social and environmental costs while promoting more equitable value distribution, improved market access, and sustainable production practices.
Lisa‐Marie Schulte, Awudu Abdulai
wiley +1 more source
COVID-19 and Social and Health Inequalities in Italy: A Syndemic Approach
e-cadernos ces, 2023 The article begins by introducing three questions that make the Italian case of health inequalities during the COVID-19 pandemic particularly interesting and goes on to discuss the problem of an appropriate and valid model to analyse the outbreak ...
Guido Giarelli
doaj +1 more source
Advanced Intelligent Discovery, EarlyView.A physics‐guided machine learning framework estimates Young's modulus in multilayered multimaterial hyperelastic cylinders using contact mechanics. A semiempirical stiffness law is embedded into a custom neural network, ensuring physically consistent predictions. Validation against experimental and numerical data on C.
Christoforos Rekatsinas +4 more
wiley +1 more source
The Development of Multiple Intelligence Based Textbook
Malikussaleh Journal of Mathematics Learning, 2021 This study aims to develop multiple intelligence-based textbooks seventh grade junior high school students with material on equations and inequalities. It is hoped that the results of the development of this textbook can improve student learning outcomes,
S Suwanto, Azrina Purba
doaj +1 more source
Entanglement and Spontaneous Symmetry Breaking in Quantum Spin Models
, 2003 It is shown that spontaneous symmetry breaking does not modify the ground-state entanglement of two spins, as defined by the concurrence, in the XXZ- and the transverse field Ising-chain.
A. Osterloh +20 more
core +1 more source