Updated Feb. 15, 2024 at 5:00 p.m.* OULU — It’s a little paradise for studying and innovating. With its many cafés, huge beanbags for napping, fab lab for 3D printing and several hairdressers, the ultramodern university in Oulu, Finland, is not your typical university. A private 5G network on the roof provides super-connectivity to the 14,000 students. Some 400 sensors monitor temperature, humidity, sunshine… crucial information in this snow-covered corner of Lapland, just 200 kilometers from the Arctic Circle. On this winter’s day, the thermometer dips to minus 15 °C and the sun sets at 3 p…