Results 1 to 10 of about 21,728 (231)

Technology for the Recovery of Lithium from Geothermal Brines

open access: yesEnergies, 2021
Lithium is the principal component of high-energy-density batteries and is a critical material necessary for the economy and security of the United States.
William T. Stringfellow   +1 more
doaj   +1 more source

A new class of infinite products, and Euler's totient

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1994
We introduce some new infinite products, the simplest being(1−y)∏k=2∞∏j∈ϕk(1−ykqj)1/k=(1−y1−qy)1/(1−q),where ϕk is the set of positive integers less than and relatively prime to k, valid for |y|∧|qy| both less than unity, with q≠1.
Geoffrey B. Campbell
doaj   +1 more source

Area-Time Efficient Implementation of the Elliptic Curve Method of Factoring in Reconfigurable Hardware for Application in the Number Field Sieve [PDF]

open access: yesIEEE Transactions on Computers, 2010
A novel portable hardware architecture of the Elliptic Curve Method of factoring, designed and optimized for application in the relation collection step of the Number Field Sieve, is described and analyzed. A comparison with an earlier proof-of-concept design by Pelzl et al.
Kris Gaj   +7 more
openaire   +1 more source

A Decision-Tree-Based Algorithm for Speech/Music Classification and Segmentation

open access: yesEURASIP Journal on Audio, Speech, and Music Processing, 2009
We present an efficient algorithm for segmentation of audio signals into speech or music. The central motivation to our study is consumer audio applications, where various real-time enhancements are often applied.
Lavner Yizhar, Ruinskiy Dima
doaj   +2 more sources

A Spheroid Model for the Role of Shape in Particle Size Analysis

open access: yesKONA Powder and Particle Journal, 2015
Standard procedure in particle size analysis is to express size as an equivalent sphere diameter. As a consequence, results obtained by procedures based on different kinds of response give different results.
Richard Hogg
doaj   +1 more source

Effect of nanoclay particles on some physical and mechanical properties of soils [PDF]

open access: yesJournal of Agricultural Machinery, 2016
Introduction: As a mechanical tillage practices on soil preparation improve soil structure, increase in porosity, better distribution of soil aggregates and eventually modify the physical properties of soil.
H Sharifnasab, N Abbasi
doaj   +1 more source

Six-Dimensional Pose Estimation of Molecular Sieve Drying Package Based on Red Green Blue–Depth Camera

open access: yesSensors
This paper aims to address the challenge of precise robotic grasping of molecular sieve drying bags during automated packaging by proposing a six-dimensional (6D) pose estimation method based on an red green blue-depth (RGB-D) camera. The method consists
Yibing Chen   +5 more
doaj   +1 more source

Some applications of Sieve methods in algebraic number fields

open access: yesManuscripta Mathematica, 1984
Let \(K\) be an algebraic number field of degree \(n=r_ 1+2r_ 2\), with discriminant \(d\) and with ring of integers \(Z_ K\). Denote by \({\mathfrak R}\) the set of integers \(\alpha \in Z_ K\) satisfying \(\alpha\) \(\equiv \gamma \bmod {\mathfrak q}\) (integral ideal), \(Q_ ...
openaire   +1 more source

First-principles prediction of magnetically ordered half-metals above room temperature

open access: yesJournal of Materiomics, 2019
Half-metallicity (HM) offers great potential for engineering spintronic applications, yet only few magnetic materials present metallicity in just one spin channel.
Muhammad Atif Sattar   +3 more
doaj   +1 more source

Interaction effect of zeolite and salt stress in reproductive stage of four canola varieties [PDF]

open access: yesتنش های محیطی در علوم زراعی, 2018
Introduction Canola (Brassica napus L.) is one of the most important plants to produce edible oil in Iran and in the world and also one of the negative factors for crop plants is the relative salinity of irrigation water in some areas of Iran.
Vahid Esmaeilzadeh   +4 more
doaj   +1 more source

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