World Journal of Engineering Research and Technology (WJERT) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , Indian Science Publications , SOCOLAR, China , International Institute of Organized Research (I2OR) , Cosmos Impact Factor , Research Bible, Fuchu, Tokyo. JAPAN , Scientific Indexing Services (SIS) , Jour Informatics (Under Process) , UDLedge Science Citation Index , International Impact Factor Services , International Scientific Indexing, UAE , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Scientific Journal Impact Factor (SJIF) , Science Library Index, Dubai, United Arab Emirates , Eurasian Scientific Journal Index (ESJI) , Global Impact Factor (0.342) , IFSIJ Measure of Journal Quality , Web of Science Group (Under Process) , Directory of Research Journals Indexing , Scholar Article Journal Index (SAJI) , International Scientific Indexing ( ISI ) , Scope Database , 

World Journal of Engineering
Research and Technology

( An ISO 9001:2015 Certified International Journal )

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.924

ICV : 79.45

News & Updation

  • Article Invited for Publication

    Article are invited for publication in WJERT Coming Issue

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    WJERT Rank with Index Copernicus Value 79.45 due to high reputation at International Level

  • New Issue Published

    Its Our pleasure to inform you that, WJERT November 2022 Issue has been Published, Kindly check it on

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    Its our Pleasure to Inform you that WJERT Impact Factor has been increased from  5.549 to 5.924 due to high quality Publication at International Level


    NOVEMBER 2022 Issue has been successfully launched on 1 November 2022.




Niveen Farid Abdel Maaboud* and Sanaa Mohamed Enany


The pandemic of the Corona virus has increased demand for face masks to prevent the virus from spreading from one person to another. Due to the shortage of medical masks in many circumstances, numerous public health organizations have approved the use of other types of masks as suitable alternatives. Cotton masks are low-cost alternative masks that are popular in developing countries because they can be washed and dried several times and used for up to months. The cotton masks can be one or two layers thick with stretchy earloops. However, if this type of mask is used for an extended period of time, its quality decreases and its capacity to filter out released particles is compromised. Although wearing a mask is partly intended to shield others from inhaled and virus-containing particles, few research have looked into the emission of particles from a face mask into the surrounding air. In this paper, we investigate the emission of micro particles using a micro-dispensing device that simulates exhale while using various masks. The filtering efficiency of cotton masks was found to be lower than that of surgical masks as the study proved that surgical masks minimize external particle emission rates and sizes compared to cotton masks, which confirms the power of medical masks' efficiency. The study was made using the digital in-line holography which could image the emitted particles for digital analysis. The number of particles emitted within a given area allowed us to determine the particle emission rate.

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