Editorial

Pages 1-1

• Editorial
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Recent Preventive Methods to Reduce the Infection Diseases by Air Distributions Control

Pages 2-28

Fatma A-M Kassem; Ahmed Farouk AbdelGawad; A. E. Abu El-Ezz; Mofreh M. Nassief; Mohamed Adel

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Updated SI prefixes extension: ronto(r), quecto(q), ronna(R), quetta(Q)

Pages 29-34

Tarek M. El-Basheer; hatem khalaf Mohamed

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A proposed method using t-test for stability check in proficiency testing in tensile and hardness tests

Pages 35-43

Riham Hegazy; Magdy I. Mohamed

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Calibration and uncertainty evaluation for sound level meter utilizing calibrator

Pages 44-53

Mahmoud Younis; Tarek M. El-Basheer; hatem khalaf Mohamed

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Method validation of quantitative FTIR as rapid and green analytical technique for dyes

Pages 54-63

Khaled E Elnagar; Heba A. El-Meged; Ahmed M. Abdel-Razik

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Uncertainty Evaluation in calibration of Engineer’s Steel Rulers and Measuring Tapes; GUM and Monte Carlo Methods

Pages 64-79

Ahmed Mohamed ElMelegy

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