Results 31 to 40 of about 46,847 (189)

On Estimation of Reliability Functions for the Extended Rayleigh Distribution under Progressive First-Failure Censoring Model

open access: yesAxioms, 2023
When conducting reliability studies, the progressive first-failure censoring (PFFC) method is useful in situations in which the units of the life testing experiment are separated into groups consisting of k units each with the intention of seeing only ...
Mahmoud Hamed Abu-Moussa   +2 more
doaj   +1 more source

Pupils of African Heritage, Mathematics Education and Social Justice [PDF]

open access: yes, 2007
This article focuses on pupils of African heritage in learning mathematics in the midst of the debate on race and inequality in educational provision. It discusses the widespread notions about the challenging nature of mathematics as a subject to learn ...
Glevey, Kwame
core   +1 more source

The Impact of Using a Distance Learning Network on Building Teachers' Communities of Practice in Egypt [PDF]

open access: yes, 2006
This research is a case study of using a distance learning network for teachers’ professional development in Egypt. It aims to investigate the impact of using Egypt’s National Network for Distance Training (NNDT) in developing teachers’ knowledge and on ...
Banks, Frank, Gouda, Amal
core   +1 more source

Clifford Algebras and Euclid's Parameterization of Pythagorean Triples

open access: yes, 2012
We show that the space of Euclid's parameters for Pythagorean triples is endowed with a natural symplectic structure and that it emerges as a spinor space of the Clifford algebra $\mathbb{R}_{2,1}$, whose minimal version may be conceptualized as a 4 ...
Kocik, Jerzy
core   +1 more source

Remarks on the Egyptian 2/D table in favor of a global approach (D composite number) [PDF]

open access: yes, 2014
Egyptian decompositions of 2/D as a sum of two unit fractions are studied by means of certain divisors of D, namely r and s. Our analysis does not concern the method to find r and s, but just why the scribes have chosen a solution instead of another.
Bréhamet, Lionel
core   +2 more sources

Enhancing Finite Mathematics with Global Awareness [PDF]

open access: yes, 2002
This paper describes the project of modifying the course, Finite Mathematics, to meet a Global Awareness course requirement. The components of the revised course are described, including topics, in-class activities, and student evaluation methods, along ...
Hydorn, D. L.
core   +1 more source

Improving the acoustic performance of flexible polyurethane foam using biochar modified by (3-aminopropyl)trimethoxysilane coupling agent

open access: yesScientific Reports
This study aims to investigate the potential of integrating natural biochar (BC) derived from eggshell waste into flexible polyurethane (FPU) foam to enhance its mechanical and acoustic performance.
Ahmed Abdelhamid Maamoun   +6 more
doaj   +1 more source

Wearable Electrospun Piezoelectric Mats Based on a PVDF Nanofiber–ZnO@ZnS Core–Shell Nanoparticles Composite for Power Generation

open access: yesNanomaterials, 2023
This work adopted a strategy to use new functional high-performance piezoelectric materials for sustainable energy production in wearable self-powered electrical devices.
Nehal Ali   +3 more
doaj   +1 more source

Spectroscopic study of the coloring techniques used in Egyptian ceramics from the ptolemaic and roman period

open access: yesHeliyon, 2022
The manufacture of the Egyptian Faience through the periods of Ptolemaic and roman shows intense use of polychrome; our main concerns in this research are investigating the parameters controlling the blue color variation and the production of the apple ...
Nehal Ali   +2 more
doaj   +1 more source

La práctica matemática en el Antiguo Egipto. Una relectura del Problema 10 del Papiro Matemático de Moscú

open access: yesAnuario de la Escuela de Historia Virtual, 2015
Mathematics, as a social and cultural construct, is not an ahistorical and enduring entity, but is subject to developments and vicissitudes of human communities from which they arose.
Héctor Horacio Gerván
doaj  

Home - About - Disclaimer - Privacy