Author: The Conversation

Many eight- to 12-year-olds are now heavy users of social media such as Instagram and Snapchat – even though most platforms require users to be 13 or over. However, concern over young people’s use of social media tends to focus on older teenagers or young adults – rather than this preteen or “tween” group – and concentrates on specific issues such as cyberbullying or sexting. My new research investigated tweens’ perceptions of social media and the issues they face when engaging with using these platforms. It reveals that while children are aware of dangers such as online predators, what tweens are being taught by parents and schools…

One of the central technologies of artificial intelligence is neural networks. In this interview, Tam Nguyen, a professor of computer science at the University of Dayton, explains how neural networks, programs in which a series of algorithms try to simulate the human brain work. https://www.youtube.com/watch?v=GqAw9OpuE9c&feature=emb_logo Tam Nguyen explains neural networks. What are some examples of neural networks that are familiar to most people? There are many applications of neural networks. One common example is your smartphone camera’s ability to recognize faces. Driverless cars are equipped with multiple cameras which try to recognize other vehicles, traffic signs and pedestrians by using neural networks, and…

Sensors are all around. They are in automatic doors, at cash registers, in doctors’ offices and hospitals. They are used inside the body and outside. Sensors detect aspects of the physical world – matter, energy, force – similarly to a person’s or animal’s senses. But instead of translating the information into nerve impulses, sensors translate them into electrical signals. The signals can be stored, processed on a computer or displayed on a screen. They can be a current or voltage that is constant or varying with time. Sensors answer many important questions such as how well-inflated are a car’s tires, whether ice…

What is your idea of an asteroid? Many people think of them as potato-shaped, inert and perhaps rather dull, pock-marked objects – far away in deep space. But over the last ten years, two Japanese space missions – Hayabusa and now Hayabusa 2 – have dispatched that view to the history books. Asteroids are interesting bodies that may be able to explain how life on Earth came about. The Japanese Space Agency, JAXA, has brought back samples to Earth from the 1km-wide asteroid Ryugu – touching down on December 6 at in South Australia. The first Hayabusa craft returned samples from asteroid Itokawa in 2010, which like Ryugu orbit…

During the first UK lockdown I received an email from my son’s primary school with a list of webcams we might enjoy having a look at. We particularly enjoyed watching and identifying the animals at a particular African watering hole that we could watch, live, online. I continued exploring this world of live-streamed place-based webcams, something I had previously overlooked. I was fascinated by those focusing on city centres, which revealed largely deserted urban landscapes. I left nature-cams and coastal webcams open on my PC monitor as welcome distractions as I worked from home. They offered me a portal to the outside…

Experienced outdoor athletes know that with winter rapidly approaching, the secret to success lies in protecting the core. That is, the body’s core temperature through layering, wicking and a host of ever-improving technical fabrics that prevent the cold, snow and ice from affecting performance.The same could be said for cybersecurity. With organizations and workers now in their ninth month of COVID-19, the time has come to prepare as the threat of cyberattacks becomes even more menacing.Cybersecurity experts predict that in 2021, there will be a cyberattack incident every 11 seconds. This is nearly twice what it was in 2019 (every 19 seconds),…

New research is questioning the popular notion that cybercriminals can make millions of dollars from the comfort of home — and without much effort. Our paper, published in the journal Trends in Organised Crime, suggests offenders who illegally sell cybercrime tools to other groups aren’t promised automatic success. Indeed, the “crimeware-as-a-service” market is a highly competitive one. To succeed, providers have to work hard to attract clients and build up their criminal business. They must combine their skills and employ business acumen to attract (and profit from) other cybercriminals wanting their “services”. And the tactics they use more closely resemble a business…

As the Thanksgiving holiday was winding down, a medical center in Salem, Oregon, found itself in the middle of a frothing social media mess. A nurse named Ashley Grames posted a video on TikTok that went viral in which she mock-confessed to ignoring coronavirus health guidelines. The video – which Grames has since taken down, though it remains available on other feeds – is less than 15 seconds long. And if you’re not familiar with TikTok tropes, the video will seem very weird. The nurse is wearing scrubs and seemingly at a medical facility. She lip-syncs to a short audio clip from “The Grinch” and mocks her…

As more and more good news about vaccines has come pouring in, Zoom has watched its shares tumble. Contrary to nervous markets, however, we believe video conferencing and remote working are here to stay – whether we like it or not. During the pandemic, how and where we work changed for many of us. The UK’s Office for National Statistics revealed that working from home had increased from 5% of the workforce before the pandemic to 47% in April 2020 – less than two months after the pandemic was declared. Hand in hand with this unprecedented rise in homeworking was an equally surprising increase in the use…

Bitcoin is back. Three years after the bubble that inflated its value from US$5,000 to US$20,000 in less than three months burst in spectacular fashion, plunging more than 80%, the cryptocurrency is again on the verge of a record high. In recent days it has been trading above US$19,000, up from US$10,000 in October and US$5,900 in March. The price of Ethereum, the second-largest cryptocurrency by market value, has also surged over the past few months, up from less than US$250 in July to about US$600. There are wild reports that by the end of 2021 Bitcoin could surge to US$100,000,…