Results 21 to 30 of about 46,847 (189)

Recycling of bypass cement kiln dust in the production of eco-friendly roof tiles

open access: yesMaterials Research Express, 2023
Most of the research of building materials companies at present focuses on recycling waste to minimize the cost of their products and for the safe disposal of these wastes.
K A M ElNaggar   +3 more
doaj   +1 more source

Intelligent improvement of Kalman filter based on artificial intelligence for sensorless speed estimation and control of DC motors [PDF]

open access: yesFME Transactions
The state estimation is considered as an essential and complex task for accurate and efficient plant control and monitoring in industrial applications. The measuring system including sensors is a significant investments for any control systems to monitor
Essa Mohamed El-Sayed M.   +2 more
doaj   +1 more source

Radiation synthesis and chemical modifications of p(AAm-co-AAc) hydrogel for improving their adsorptive removal of metal ions from polluted water

open access: yesScientific Reports, 2023
The research focuses on utilizing gamma irradiation to synthesize polyacrylic acid-co-polyacrylamide p(AAm-co-AAc) hydrogels. The effect of synthetic parameters on physicochemical features of p(AAm-co-AAc) hydrogls were examined, including acrylic acid ...
Israa Kamal Abdel Maksoud   +5 more
doaj   +1 more source

Fractional-Order Edge Detection Masks for Diabetic Retinopathy Diagnosis as a Case Study

open access: yesComputers, 2021
Edge detection is one of the main steps in the image processing field, especially in biomedical imaging, to diagnose a disease or trace its progress. The transfer of medical images makes them more susceptible to quality degradation due to any imposed ...
Samar M. Ismail   +3 more
doaj   +1 more source

The use of aluminum slag waste in the preparation of roof tiles

open access: yesMaterials Research Express, 2021
Aluminum slag waste generated from the smelting process of bauxite was used to prepare roof tiles samples. Clay was substituted by slag waste in percentages reaching 40% in the basic mix and the plasticity of the obtained mud was determined.
M M Ahmed   +3 more
doaj   +1 more source

Mathematical analysis and simulations for a Caputo-Fabrizio fractional COVID-19 model

open access: yesPartial Differential Equations in Applied Mathematics, 2023
In this paper, a novel approach for modeling the spread of highly infectious and dangerous viruses, particularly focusing on the COVID-19 pandemic is presented.
Waleed Adel   +3 more
doaj   +1 more source

The Role of Professional Development Networks in Reforming Mathematics Education in Egypt [PDF]

open access: yes, 2005
Mathematics is considered to be one of the key areas for growth and development in Egyptian schools (Monk et al., 1999). Therefore, reforming mathematics education has been given priority by the Egyptian Ministry of Education.
Banks, Frank, Gouda, Amal
core  

Mathematical Model of a Thermoelastic Micro-elongated Plate Influenced by Initial Stress and an Upper Load from a Piezoelectric Layer according to Dual-phase-lag Model [PDF]

open access: yesJournal of Applied and Computational Mechanics
The main goal of this work is to investigate how the initial stress affects a thermoelastic micro-elongated layer under a layer of piezoelectric loading using the theory of Lord-Shulman (L-S) with relaxation time and the model of dual-phase-lag (DPL ...
Mohamed Othman   +2 more
doaj   +1 more source

Changing classroom practice in science and mathematics lessons in Egypt : inhibitors and opportunities [PDF]

open access: yes, 2002
Egyptian science and mathematics teachers self-report shows that examinations are viewed as the dominant factor inhibiting changes to classroom practice.
Ghrist, Mary   +3 more
core  

Sofia A. Yanovskaya: The Marxist Pioneer of Mathematical Logic in the Soviet Union [PDF]

open access: yes, 2019
K. Marx’s 200th jubilee coincides with the celebration of the 85 years from the first publication of his “Mathematical Manuscripts” in 1933. Its editor, Sofia Alexandrovna Yanovskaya (1896–1966), was a renowned Soviet mathematician ...
Kilakos, Dimitris
core   +2 more sources

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