We explain the element technologies such as millimeter waves, beamforming, and edge computing that realize '5G', the fifth-generation mobile communication system expected to be the infrastructure for autonomous driving and remote medicine, not just smartphones.
Quantum computers are said to solve calculations that would take supercomputers tens of thousands of years in mere seconds. We explain this entirely new computing paradigm that utilizes the mysterious phenomena of quantum mechanics, 'superposition' and 'entanglement'.
To counter the introduction of the iPhone, Google formed the 'Open Handset Alliance'. We explain how the shift in business model to provide the OS for free changed smartphones around the world.
A magical technology that completes a payment just by touching Suica, PASMO, or Osaifu-Keitai to a ticket gate. This article explains the physical law of 'electromagnetic induction' behind it and the NFC communication standard.
Crawling along the seabed, the thin glass threads connecting the world's continents are known as 'optical fibers'. We explain the physics of 'total internal reflection', which is the reason why light travels through bent glass tubes without leaking, and the mechanism of optical communication that supports the internet.
From smartphones to electric vehicles, "lithium-ion batteries" are essential to modern society. We explain the dynamic chemical reactions of electrons and ions occurring inside them and why they are so light and have such high capacity.
Often thought of as "impossible to solve on your own," the Rubik's Cube can actually be solved by anyone by memorizing a few "algorithms" (sequences). We explain the world of puzzles woven by group theory and mathematics.
Triggering the third AI boom and serving as the foundational technology for ChatGPT and others, 'Deep Learning' allows algorithms modeled after human neural networks to autonomously discover features. We explain how this works.
From home appliances and automobiles to factory machinery, the 'IoT (Internet of Things)' connects all sorts of things to the internet. We explain how sensor technology and communication networks gather data and collaborate with AI to create value.
What does the 's' in 'https' in a website URL mean? We explain how the encryption technology 'SSL/TLS' protects global e-commerce and communication security using a hybrid approach of symmetric and public keys.
The history of the iPhone began with Steve Jobs's legendary presentation in 2007. We look back at the trajectory of the smartphone revolution, from the elimination of physical keyboards to the birth of the App Store.
Mahjong, the intellectual table game from the East woven with 136 tiles. We explain the basic structure of this game with an exquisite balance of luck and skill, how to make melds (mentsu) and pairs (atama), and typical 'yaku' (winning hands).
Bluetooth is indispensable for modern wireless devices. Why does it connect stably without interference? We unravel the technology originating from military use called frequency hopping.
Wi-Fi connects smartphones and PCs to the internet. We explain from the perspectives of physics and communication engineering how invisible radio waves accurately and rapidly transport vast amounts of digital data.
The 'noise cancelling' feature that makes ambient noise disappear the moment you put on your earphones. This article deeply explains the underlying physics principle of 'wave interference' and its technological history.
VPN (Virtual Private Network) is essential for remote work. This article explains the mechanism of creating 'your own safe private tunnel' on the internet, where anyone can peek, using encryption and encapsulation.
A deep dive into Apple's history and technological innovation, from Steve Jobs and Wozniak's garage startup to the iPhone revolution and becoming the world's most valuable company.
