Ah-Raihan Blog

  বিটওয়াইজ অপারেটর (Bitwise Operator) — একদম সহজভাবে বুঝে ফেলো প্রোগ্রামিংয়ে আমরা সাধারণত logical operator (যেমন && , || , ! ) ব্যবহার করি শর্ত যাচাই করার জন্য। কিন্তু bitwise operator একটু আলাদা — এটা কাজ করে bit-level এ, মানে সংখ্যার binary রূপের উপর সরাসরি অপারেশন চালায়। এই জিনিসটা competitive programming (CP) এ অনেক দরকারি, কারণ এটা দিয়ে আমরা — দ্রুত কিছু গণনা করতে পারি সেট (set) বা mask হিসেবে সংখ্যা ব্যবহার করতে পারি পারফরম্যান্স বাড়াতে পারি চলো এখন ধাপে ধাপে বুঝে ফেলি। 👇 🧩 ১️⃣  বিটওয়াইজ অপারেটরগুলা কী? অপারেটর নাম কাজ & AND দুই bit-ই 1 হলে 1 ` ` OR ^ XOR দুই bit আলাদা হলে 1 ~ NOT সব bit উল্টে দেয় (1 → 0, 0 → 1) << Left Shift bit গুলোকে বামে সরিয়ে দেয় >> Right Shift bit গুলোকে ডানে সরিয়ে দেয় 🧠 ২️⃣  Bitwise কীভাবে কাজ করে? ধরা যাক: Expression Binary Result Decimal Result Explanation a & b 0001 1 দুই জায়গায়ই 1 থাকলে 1 `a b` 0111 7 a ^ b ...

  AI is not scary: Why we should embrace artificial intelligence Artificial intelligence (AI) is a term that refers to the ability of machines to perform tasks that normally require human intelligence, such as reasoning, learning, decision making, and creativity. AI is often seen as a threat to human jobs, privacy, and even existence, but in this blog post, I will argue that AI is not scary, but rather a powerful tool that can enhance our lives and society in many ways. First of all, AI can help us solve some of the most pressing problems that humanity faces, such as climate change, poverty, disease, and education. AI can analyze massive amounts of data, find patterns and insights, and propose solutions that humans may not be able to discover or implement. For example, AI can help us optimize energy consumption, reduce greenhouse gas emissions, predict natural disasters, diagnose diseases, design drugs and vaccines, and personalize learning. Secondly, AI can augment our capabilitie...

 The Best Free Image Background Remover Online Tools Removing the background from an image can be a tedious and time-consuming task, especially if you don't have access to professional software like Photoshop. Fortunately, there are several free online tools that can help you remove the background from an image quickly and easily. In this blog post, we'll explore the best free image background remover online tools and how they can help you create stunning visuals for your projects. Remove.bg Remove.bg is a popular online tool that uses AI technology to automatically remove the background from an image. All you need to do is upload your image, and the tool will do the rest. Remove.bg is free to use for images up to 0.25 megapixels and offers paid plans for larger images. Clipping Magic Clipping Magic is a user-friendly online tool that allows you to remove the background from an image in just a few clicks. The tool uses AI technology to accurately detect the foreground and backg...

  1: What are satellites? A: Satellites are artificial objects that orbit around the Earth, providing various services such as communication, navigation, observation, and research. 2: What are the advancements in satellite technology? A: Some of the latest advancements in satellite technology include CubeSats, laser communication, and artificial intelligence (AI). 3: What are CubeSats? A: CubeSats are miniature satellites that are cheaper and easier to launch than traditional satellites. They are popular among universities and small businesses that want to conduct experiments in space. 4: How do satellites help in communication? A: Satellites enable global communication by transmitting voice, data, and video signals across the world. This is especially useful in remote areas where traditional communication methods are not feasible. 5: How do satellites help in navigation? A: Satellites are used for GPS navigation in vehicles, aircraft, and ships. This technology has become an essen...

The Fascinating World of Satellites: Advancements and Applications Satellites have revolutionized the way we communicate, navigate, and observe our planet. These spacecraft, orbiting around the Earth, provide us with a wealth of information that we wouldn't otherwise have. From tracking weather patterns to predicting natural disasters, satellites have become an essential tool for scientists, governments, and businesses. In this blog post, we'll explore the advancements in satellite technology and its applications in various fields. Advancements in Satellite Technology The history of satellites dates back to the mid-20th century when the first artificial satellite, Sputnik , was launched into space by the Soviet Union. Since then, there have been numerous advancements in satellite technology, making them smaller, lighter, and more efficient. Some of the latest advancements include: CubeSats: These are miniature satellites that are cheaper and easier to launch than traditional sa...

 Tesla: Revolutionizing the Automotive Industry with Innovation and Sustainability Tesla has become a household name when it comes to electric vehicles and sustainable energy solutions. With its cutting-edge technology and innovative designs, Tesla has become a driving force in the automotive industry. In this article, we will explore the history of Tesla, its current lineup of electric vehicles, and the future of sustainable transportation. History of Tesla Founded in 2003 by Elon Musk, Tesla's mission was to accelerate the transition to sustainable energy. Initially, Tesla focused on producing electric powertrains for other automakers, but soon shifted its focus to producing its own electric vehicles. The first Tesla vehicle, the Roadster, was launched in 2008, and the company has been expanding its lineup ever since. Tesla Electric Vehicles Tesla currently offers four electric vehicles: the Model S, Model X, Model 3, and Model Y. Each vehicle offers unique features and benefits,...