Heart rate estimation from electrocardiogram signals is very important for the early detection of cardiovascular diseases. However, due to large individual differences and varying electrocardiogram signal quality, there does not exist a single reliable estimation algorithm that works well on all subjects. Every algorithm may break down on certain subjects, resulting in a significant estimation error. Ensemble regression, which aggregates the outputs of multiple base estimators for more reliable and stable estimates, can be used to remedy this problem. Moreover, active learning can be used to optimally select a few trials from a new subject to label, based on which a stacking ensemble regression model can be trained to aggregate the base estimators. This paper proposes four active stacking approaches, and demonstrates that they all significantly outperform three common unsupervised ensemble regression approaches, and a supervised stacking approach which randomly selects some trials to label. Remarkably, our active stacking approaches only need three or four labeled trials from each subject to achieve an average root mean squared estimation error below three beats per minute, making them very convenient for real-world applications. To our knowledge, this is the first research on active stacking, and its application to heart rate estimation.

Nintendo may be about to give the Switch a refresh. A new report from The Wall Street Journal claims that the company could be planning two new consoles for as soon as this summer. Citing anonymous people "familiar with the matter," the report says that Nintendo is prepping two new devices, a cheaper version of the Switch that would be the equivalent of a Nintendo 3DS replacement as well as a more powerful model, similar to how Microsoft and Sony have each released souped-up versions of their game consoles. The more enhanced Switch, however, won't be as powerful as the Xbox One X or PlayStation 4 Pro and Nintendo has a track record of looking to differentiate its latest products with more than just graphical boosts. Both devices could make appearances at June's E3 gaming event in Los Angeles, the Journal reports.

Technologies Inc. aims to release a mass-market flying motorcycle by 2022, Chief Executive Officer Shuhei Komatsu said. Technologies, which mainly develops small drones, hopes to sell the product, called a "hover bike," in emerging economies in Africa, the Middle East and Asia with poor road infrastructure. Many companies around the world are developing flying cars. Technologies is among those trying to enter the market. "We'll create a (flying) bike first, in order to get flying cars widely used in society eventually," Komatsu said.

Almost 1.5million jobs are at risk of being replaced by robots, a new survey by the Office of National Statistics (ONS) has revealed. Women and young people are at higher risk than other demographics in their jobs. A total of 7.4 per cent of all jobs are under threat, a figure which is slightly down from the 8.1 per cent number from 2011. Almost 1.5million jobs are at risk of being replaced by robots, a new survey by the Office of National Statistics (ONS) has revealed. The ONS analysed the jobs of 20 million people from 2011 and 2017 in England and found that that 7.4 per cents are at high risk of automation.

An online tool has been unveiled which is capable of bringing black and white photographs to life instantaneously by adding colour to them using artificial intelligence. Colourisation of old images is a normally time consuming process which requires specialist training and expensive software. The tool, ColouriseSG, is able to do it for free from only a single digital image and works on iconic historical photographs and old family portraits. Try it for yourself here or via the interactive tool below. The artificial intelligence is able to colourise images for free from only a single digital image and works on iconic historical photographs and old family portraits.

Apple appears to be broadcasting eerie footage from inside of its own headquarters, hours before one of its biggest events in years. Tim Cook and other senior Apple staff are set to take to the stage in Apple's own Steve Jobs Theater later today, announcing the company's new products. Unlike previous events, it will not be releasing hardware or software, but instead showing off new subscription services that allow people access to films, TV and news. That event is set to be livestreamed through Apple's own website. And that video appears to have already begun: with strange footage from inside the theatre itself.

Many rumours have been circulating for Apple's'Show Time' event on 25 March, chief among them a new TV service and a premium news subscription. But a new report now suggests there may also be a gaming subscription service, allowing people to pay one flat fee and get access to a variety of games on their iPhones and iPads. The service could rival Google's recently announced Stadia platform as well as being part of Apple's broader plan to make more money from streaming service subscriptions. We'll tell you what's true. You can form your own view.

Apple is about to take to the stage in California and unveil its latest product. But there will be no moment where a laptop is pulled from an envelope or a phone from a pocket. Because its latest product in one sense doesn't exist physically at all. Instead, its newest announcements will be a series of services: subscription platforms that allow people to sign up to watch TV and films, read the news, and play games. We'll tell you what's true. You can form your own view.

Apple has unveiled the "Apple Card", a fully titanium credit card that is powered by the iPhone. The new release is an extension of Apple Pay, the company said, which allows people to pay with their device by adding their card into it. But they now be able to be issued their credit card by Apple, too. Though the card is largely virtual, people getting one will also be sent a physical card. It will be made of titanium and have the owner's name etched into it, Apple said.

Yes, Apple's new video-streaming service is set to be unveiled later today -- we'll be reporting from the frontlines in San Francisco at 10am PT/1pm ET. Meanwhile, you might have missed Honda's plans for EV cycles, Overwatch changes are actually having an effect on toxic players and we put NVIDIA's RTX ray tracing to the test. Honda is having fun with electric cars, but what about the motorcycle? Don't worry, you'll get your fix soon. The automaker has unveiled prototypes for both the CR Electric dirt bike (above) and the Benly Electric delivery scooter, offering a peek at how it will approach emissions-free transportation on two wheels.