INTRODUCTION The human heart is one of the most important organs in our body. It continuously pumps blood throughout the body and supplies oxygen and nutrients to every organ. To perform this function properly the heart needs a regular electrical signal that controls its heartbeat. Sometimes, the hearts natural electrical system does not work properly. The heartbeat may become too slow, irregular or abnormal. This condition can make a person feel tired, dizzy, weak or even cause fainting. In such situations a pacemaker can help control the heart rhythm. A pacemaker is a small medical device designed to monitor the hearts electrical activity and provide electrical impulses when needed. Traditional pacemakers have already saved millions of lives. However modern technology is taking pacemakers to the next level. Smart pacemakers combine cardiac technology with sensors, wireless communication, data analysis and intelligent algorithms. Instead of simply providing electrical stimulation thes...
1. Introduction Blockchain Technology is one of the most transformative innovations of the modern digital era. Unlike traditional centralized record-keeping systems that rely on a single authority, Blockchain distributes information across a network of computers, making it transparent, secure, and resistant to tampering. It can record transactions, track ownership, and verify identities without needing a middleman. This technology is reshaping industries, financial systems, government services, and business operations across the world. In simple words, Blockchain is a digital ledger shared across many computers, where each new entry is grouped into a “block” and linked to the previous one, forming a chain. Once a block is added, it becomes extremely difficult to alter, which builds trust between parties who may not even know each other. Imagine a shared notebook that thousands of people hold copies of at the same time. Whenever a new entry is written, everyone's copy is updated and...