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The current COVID-19 pandemic has T-Shirt significantly altered the quantity and composition of waste generated on the African continent.This new phenomenon, coupled with the indiscriminate disposal of used personal protective equipment (PPEs), poses serious challenges to local authorities, most of whom have limited experience or lack the strategy
In recent years, with the development of blockchain, electronic bidding auction has received more and more attention.Aiming DRY HAIR SHAMPOO at the possible problems of privacy leakage in the current electronic bidding and auction, this paper proposes an electronic bidding auction system based on blockchain against malicious adversaries, which uses
Recently, the problem of discrimination and racism has become particularly acute in American society due to the fact that racism still exists in the subconscious of Americans.This is evidenced by the discriminatory speeches of former US leader Donald Trump, the methods used by the police against the black population and the attitude of the older Pl