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72 articles to explore · Page 5

Key fob inside a driver's pocket communicating wirelessly with antennas around a car for passive keyless entry

AutomobilesExplainer

How Does Your Car Know the Key Is in Your Pocket?

Learn how keyless entry uses antennas, radio signals and encrypted authentication to detect a key fob, unlock the car and verify the key is inside.

9 Sept 202616 min read

Cricket scoring event travelling from a stadium through a live data platform to apps, websites and devices around the world

CricketExplainer

How Does a Cricket Score Update Almost Instantly Around the World?

Learn how a cricket score travels from the ground to data providers, servers, APIs, apps and websites around the world within seconds.

9 Sept 202615 min read

Mechanical typewriter, modern laptop and smartphone connected by the same QWERTY keyboard layout

GadgetsExplainer

Why Is a Keyboard QWERTY Instead of ABCDE?

Why aren't keyboard letters arranged alphabetically? Learn how QWERTY evolved from early typewriters, why its exact origin is debated and why we still use it.

9 Sept 202612 min read

Mobile payments, ATM, card and bank transfers flowing through authentication, payment switches, fraud checks and core banking systems

Banking & FinanceExplainer

How Do Banks Process Millions of Transactions Every Day?

Learn how core banking systems, payment switches, databases, queues, fraud checks, reconciliation and settlement let banks process enormous transaction volumes safely.

8 Sept 202616 min read

Illustration showing a student learning while awake and the brain reorganising newly learned information during sleep.

EducationExplainer

Why Does Sleep Matter So Much for Learning and Memory?

Learn how sleep helps the brain encode new information, consolidate memories and prepare for learning—and why all-nighters can work against you.

8 Sept 202612 min read

Banking app and website connecting through encryption, authentication and firewall layers to secure bank account systems

Banking & FinanceExplainer

How Do Banking Apps and Websites Keep Your Money Safe?

Learn how banking apps and internet banking use encryption, multi-factor authentication, device binding, secure sessions, fraud monitoring and protected bank systems to safeguard your account.

7 Sept 202617 min read

Smartwatch shining green light into the wrist and detecting reflected light changes caused by pulsing blood

GadgetsExplainer

How Does a Smartwatch Measure Your Heart Rate?

Learn how smartwatch heart-rate sensors use green LEDs, photodiodes and signal processing to detect your pulse—and why readings can sometimes be wrong.

7 Sept 202614 min read

Cricket DRS review combining video replay, edge detection and ball tracking after an LBW appeal

CricketExplainer

How Does DRS Work in Cricket?

Learn how cricket's DRS works, including player reviews, UltraEdge, ball tracking, LBW decisions, Umpire's Call and when teams lose a review.

6 Sept 202615 min read

Cricket ball passing the bat while a synchronized audio waveform shows a spike used for UltraEdge edge detection

CricketExplainer

How Does UltraEdge Know Whether the Cricket Ball Touched the Bat?

Learn how UltraEdge combines sensitive audio with synchronized slow-motion video to help umpires decide whether a cricket ball touched the bat or glove.

6 Sept 202614 min read

Large naturally aspirated engine and smaller turbocharged engine feeding into vehicle performance factors including power, weight and gearing

AutomobilesExplainer

Why Doesn't a Bigger Engine Always Mean a Faster Car?

Engine size is only one part of performance. Learn how turbocharging, horsepower, weight, gearing, traction and aerodynamics determine how fast a car is.

6 Sept 202613 min read

Bank system authorizing a ₹5,000 withdrawal while an ATM selects notes from denomination-specific cash cassettes

Banking & FinanceExplainer

How Does an ATM Know Your Balance—and Dispense Exactly the Right Cash?

Learn how an ATM asks your bank for authorization, receives balance or approval information, selects notes from cash cassettes and checks the cash before dispensing it.

5 Sept 202615 min read

ATM sending a secure withdrawal request through an ATM network to the customer's bank and receiving approval before dispensing cash

Banking & FinanceExplainer

How Does an ATM Communicate With Your Bank?

Follow an ATM withdrawal from card insertion and encrypted PIN entry through the ATM switch, NFS or card network, bank authorization and cash dispensing.

4 Sept 202615 min read