The best AI chatbots of 2025: I tested ChatGPT, Copilot, and others to find the top tools now

I pushed eight free AI chatbots to their limits, from writing stories to generating images, to build ZDNET's chatbot-by-chatbot guide to help you decide which is right for you.
IEEE

A New Reconfigurable True Random Number Generator and Physical Unclonable Function Unified Chip With On-Chip Auto-Calibration

Abstract: True random number generator (TRNG) and physical unclonable function (PUF) have been extensively used to secure low-cost Internet of Things (IoT) endpoints. In this paper, a lightweight ...
IEEE

A Wideband Bi-Directional 6-bit Passive Vector-Sum Phase Shifter Optimized Using Greedy Algorithm in 65-nm CMOS

Abstract: A wideband 6-bit bi-directional passive vector-sum phase shifter (PVSPS) implemented in 65-nm CMOS technology is presented. The design employs two high-bit attenuators as gain tuning ...
TechCrunch

Sam Altman says ChatGPT has hit 800M weekly active users

OpenAI CEO Sam Altman said Monday that ChatGPT has reached 800 million weekly active users, marking an increase of adoption among consumers, developers, enterprises, and governments. “Today, 4 million ...
BBC

Alarming number of people now vape, says WHO

More than 100 million people, including at least 15 million children, use e-cigarettes, fuelling a new wave of nicotine addiction, the World Health Organization, external (WHO) is warning. Children ...
TechRadar

Huge numbers of managers admit to using AI to convincingly draft or revise performance reviews - and I fear it will only accelerate the death of traditional HR

AI writers are quietly replacing authentic communication in many workplaces today AI-generated performance reviews leave employees questioning trust and management’s empathy Managers admit to using AI ...