Results 1 to 10 of about 145,729 (122)

Hardgrove grindability index and approximate work index of sodium feldspar [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2019
The purpose of this research was to study the feldspar of Nopphitam District, Nakhon Si Thammarat Province, Thailand with emphasis on Hardgrove grindability and determination of the approximate work index. Feldspar samples were collected, prepared, and
Chairoj Rattanakawin, Aung Lay Tin
doaj   +2 more sources

Characteristics of Mae Moh lignite: Hardgrove grindability index and approximate work index [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2012
The purpose of this research was to preliminarily study the Mae Moh lignite grindability tests emphasizing onHardgrove grindability and approximate work index determination respectively.
Wutthiphong Tara, Chairoj Rattanakawin
doaj   +1 more source

Analysis of modified second-grade fluids in thin film configurations employing the asymptotic homotopy perturbation method [PDF]

open access: yesScientific Reports
This article investigates the steady, incompressible and non-isothermal thin film flow of a modified second grade fluid under both conditions that is, lifting and drainage.
M. Mossa Al-sawalha   +5 more
doaj   +2 more sources

Stable Weak Approximation at Work in Index-Linked Catastrophe Bond Pricing [PDF]

open access: yesRisks, 2017
We consider the subject of approximating tail probabilities in the general compound renewal process framework, where severity data are assumed to follow a heavy-tailed law (in that only the first moment is assumed to exist). By using the weak convergence of compound renewal processes to α -stable Lévy motion, we derive such weak approximations ...
Krzysztof Burnecki, Mario Giuricich
openaire   +3 more sources

Complexity of Solutions Combination for the Three-Index Axial Assignment Problem

open access: yesMathematics, 2022
In this work we consider the NP-hard three-index axial assignment problem. We formulate and investigate a problem of combining feasible solutions. Such combination can be applied in a wide range of heuristic and approximate algorithms for solving the ...
Lev G. Afraimovich, Maxim D. Emelin
doaj   +1 more source

Cancer cells optimize elasticity for efficient migration [PDF]

open access: yesRoyal Society Open Science, 2020
Cancer progression is associated with alternations in the cytoskeletal architecture of cells and, consequently, their mechanical properties such as stiffness.
Ahmad Sohrabi Kashani   +1 more
doaj   +1 more source

How to measure the territorial economic impact of the COVID-19 pandemic in contexts with scarce regional data?

open access: yesREGION, 2021
In this paper we propose an index to approximate the territorial economic impact of the COVID–19 pandemic in contexts with scarce or outdated regional data, which is often the case in developing countries.
Andrés Niembro, Carla Daniela Calá
doaj   +1 more source

Application of a Deep Neural Network to Phase Retrieval in Inverse Medium Scattering Problems

open access: yesComputation, 2021
We address the inverse medium scattering problem with phaseless data motivated by nondestructive testing for optical fibers. As the phase information of the data is unknown, this problem may be regarded as a standard phase retrieval problem that consists
Soojong Lim, Jaemin Shin
doaj   +1 more source

Nonlinear Vibration of an Electrostatically Actuated ‎Functionally Graded Microbeam under Longitudinal Magnetic ‎Field [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2021
In this work, we develop a model of an electrostatically actuated functionally graded (FG) microbeam under a longitudinal magnetic field based on the Euler-Bernoulli beam and nonlocal strain gradient theories to investigate the nonlinear vibration ...
Dang Hieu   +3 more
doaj   +1 more source

Prediction of lightning flash density with the WRF model [PDF]

open access: yesAdvances in Geosciences, 2010
The Lightning Potential Index (LPI) is a measure of the potential for charge generation and separation that leads to lightning flashes in convective thunderstorms. It is calculated from model simulated updraft and microphysical fields. It was designed to
B. Lynn, Y. Yair
doaj   +1 more source

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