To prevent the spread of the COVID-19 pandemic, 2019 has seen unprecedented demand
for medical equipment and supplies. However, the problem of waste treatment has not yet …

Due to the rapid change of population structure, leading to lower birth rates and quick aging
rates, the demand for blood supply is increasing significantly. In most countries, blood …

The cash on delivery (CoD) is currently one of the significant payment mechanism in many
develo** countries' E-commerce systems. A transaction between a seller and a purchaser …

Most of the current decentralized blockchain approaches have disadvantages that need to
be improved to have efficiency and completion. First, there is no motivation for any …

Nowadays, due to rapid changes in the population structure, which results in lower fertility
rates and rapid aging, the demand for blood supply is increasing a lot. In most countries …

Nowadays, medical healthcare always plays a vital role for humans in society, especially
problems related to personal health records due to its security and sensitivity. For each …

Traditional commercial systems face many problems in terms of transportation, information
latency, and reliability, thus affecting the whole process. Blockchain technology and smart …

Abstract Internet of Things (IoT), currently, is one of the most rapidly develo** technology
trends. However, at present, users, devices, and applications using IoT services mainly …

Abstract The Internet of Things currently is one of the most interesting technology trends.
Devices in the IoT network towards mobility and compact in size, so these have a rather …

Smart contracts are computer protocols that facilitate, verify, and execute the negotiation or
execution of a contract, or that render a contractual term unnecessary. Blockchain and smart …