Spirolaterals vs INES Maps

Spirolaterals allows you to explore geometric line designs based on applying a simple rule to a number sequence. Be warned though: spirolaterals can be very addictive! You can create your own spirolaterals by entering a number or text like your name. Or you can explore the gallery of 80 spirolaterals by tapping Surprise Me! Spirolaterals raise many interesting questions: Which ones repeat and why? What kinds of symmetry are present? What happens when you use a palindrome or when your numbers increase or decrease by the same amount? I have used Spirolaterals in my math classes for many years, and students always find them fascinating. They try their name or phone number. They try to create some particular pattern. This year some students spent hours trying to create a 4x4 grid! If you create an interesting spirolateral, email me and I may include it in the Surprise Me! gallery in a future version, with full credit to you!

Explore the history of nuclear and radiological incidents around the world. INES Maps is an educational reference app for discovering major nuclear accidents, radiation incidents, criticality events, radioactive material accidents, and other significant events by location, date, and INES level. FEATURES • Explore incidents on an interactive world map • Browse events by INES level • Search by incident name, country, or description • View dates, locations, summaries, and detailed accounts • Sort incidents to find recent events within each level • Open related reference information from the incident details screen • Switch between English and Japanese ABOUT INES The International Nuclear and Radiological Event Scale (INES) is used to communicate the safety significance of nuclear and radiological events. The scale ranges from Level 1 to Level 7, with higher levels representing events of greater significance. ABOUT THE DATA Some incidents occurred before INES was introduced or do not have a confirmed official rating. In these cases, the app may show an estimated or equivalent level based on publicly available information. Historical sources may differ in their reporting of dates, release estimates, exposure levels, and event sequences. Where relevant, the app identifies these uncertainties. DISCLAIMER INES Maps is an independent educational reference app. It is not affiliated with or endorsed by the IAEA, any government agency, regulatory authority, or nuclear facility operator. This app does not provide emergency alerts, real-time radiation monitoring, medical advice, or official safety instructions. For emergencies and current safety information, always follow announcements from the appropriate authorities.