Author: The Conversation

John J Reilly, University of Strathclyde ; Anthony (Tony) Okely, University of Wollongong; Catherine Draper, University of the Witwatersrand, and Mark S. Tremblay, University of Ottawa There is increasing concern about the amount of time children and adolescents are spending in recreational screen time. There’s also increasing controversy over whether or not screen time is actually harmful. Since 2016, we (researchers who’ve contributed to the development of the 24-hour movement guidelines for children and adolescents) have led a number of wide-ranging reviews of the scientific evidence on the impact of screen time from infancy to early adulthood. We examined whether…

As Facebook celebrates 15 years of virtual friendship, social science has compiled an expansive body of research that documents the public’s love-hate relationship with its best frenemy. What many once viewed as a confidant has devolved into a messy codependence, mired by ambiguity and mistrust. It’s a relationship that’s both taken for granted, yet extremely high-maintenance, leaving users to wonder whether they should just move on with healthier friends. But it wasn’t always like this. Friendly beginnings At its launch, Facebook was one of the most authentic social networking partners. Existing online networks, like MySpace, had influential parent companies that chaperoned their platforms, pestering users…

It’s a new day not very far in the future. You wake up; your wristwatch has recorded how long you’ve slept, and monitored your heartbeat and breathing. You drive to work; car sensors track your speed and braking. You pick up some breakfast on your way, paying electronically; the transaction and the calorie content of your meal are recorded. Then you have a car accident. You phone your insurance company. Your call is answered immediately. The voice on the other end knows your name and amiably chats to you about your pet cat and how your favourite football team did…

IBM recently unveiled what it claimed was the world’s first commercial quantum computer. While the announcement of the Q System One wasn’t scientifically groundbreaking, the fact that IBM sees this as a commercial product that organisations (if not individuals) will want to use is an important breakthrough. IBM has taken a prototype technology that has existed in the lab for over 20 years and launched it in the real world. In doing so, it marks an important step towards the next generation of computing technology becoming ubiquitous, something the world isn’t yet ready for. In fact, quantum may well prove to be the most…

Never in the history of the mobile phone has there been so much hype about a new technology ahead of its launch than there is with 5G. It seems that the mobile phone operators, handset manufacturers and equipment vendors are locked into a massive global game of one-upmanship, seeking to claim to be the first to achieve something groundbreaking with the technology. But the stakes are high – the mobile industry also desperately needs 5G, whether for new revenue sources, market share or to drive growth. Since mobile phones first appeared in the mid-1980s, the industry has launched several new “generations” of…

The human brain has amazing capabilities making it in many ways more powerful than the world’s most advanced computers. So it’s not surprising that engineers have long been trying to copy it. Today, artificial neural networks inspired by the structure of the brain are used to tackle some of the most difficult problems in artificial intelligence (AI). But this approach typically involves building software so information is processed in a similar way to the brain, rather than creating hardware that mimics neurons. My colleagues and I instead hope to build the first dedicated neural network computer, using the latest “quantum” technology rather…

It’s tempting to give up on data security altogether, with all the billions of pieces of personal data – Social Security numbers, credit cards, home addresses, phone numbers, passwords and much more – breached and stolen in recent years. But that’s not realistic – nor is the idea of going offline entirely. In any case, huge data-collection corporations vacuum up data about almost every American (and many around the world) without their knowledge. https://twitter.com/BeCyberAware/status/1072172860972650498 As cybersecurity researchers, we offer good news to brighten this bleak picture. There are some simple ways to protect your personal data that can still be effective, though they involve changing how you think about your…

If you could pick one measure to evaluate your health, what would you pick? Blood pressure? Cholesterol? These are commonly measured by your GP, but there is something that is more informative: maximal aerobic capacity, otherwise known as VO₂max. This measure tells you your maximum (max) rate (V) of oxygen (O₂) uptake and use during exercise. The greater this is, the better your health. In fact, VO₂max is the best predictor of your risk, at a given point in time, of getting chronic diseases like heart disease, type 2 diabetes or certain cancers, and the best predictor of your chances of living…

If you have a smartphone, it probably is a significant part of your life, storing appointments and destinations as well as being central to your communications with friends, loved ones and co-workers. Research and investigative reporting continue to reveal the degree to which your smartphone is aware of what you’re up to and where you are – and how much of that information is shared with companies that want to track your every move, hoping to better target you with advertising. Several scholars at U.S. universities have written for The Conversation about how these technologies work, and the privacy problems they raise.…

As people increasingly buy and install smart devices in their homes, all those cheap interconnected devices create new security problems for individuals and society as a whole. The problem is compounded by businesses radically expanding the number of sensors and remote monitors it uses to manage overhead lights in corporate offices and detailed manufacturing processes in factories. Governments, too, are getting into the act – cities, especially, want to use new technologies to improve energy efficiency, reduce traffic congestion and improve water quality. The number of these “internet of things” devices is climbing into the tens of billions. They’re creating an interconnected world with the…