Well File:


Adaptive Energy Management for Self-Sustainable Wearables in Mobile Health

arXiv.org Artificial Intelligence

Wearable devices that integrate multiple sensors, processors, and communication technologies have the potential to transform mobile health for remote monitoring of health parameters. However, the small form factor of the wearable devices limits the battery size and operating lifetime. As a result, the devices require frequent recharging, which has limited their widespread adoption. Energy harvesting has emerged as an effective method towards sustainable operation of wearable devices. Unfortunately, energy harvesting alone is not sufficient to fulfill the energy requirements of wearable devices. This paper studies the novel problem of adaptive energy management towards the goal of self-sustainable wearables by using harvested energy to supplement the battery energy and to reduce manual recharging by users. To solve this problem, we propose a principled algorithm referred as AdaEM. There are two key ideas behind AdaEM. First, it uses machine learning (ML) methods to learn predictive models of user activity and energy usage patterns. These models allow us to estimate the potential of energy harvesting in a day as a function of the user activities. Second, it reasons about the uncertainty in predictions and estimations from the ML models to optimize the energy management decisions using a dynamic robust optimization (DyRO) formulation. We propose a light-weight solution for DyRO to meet the practical needs of deployment. We validate the AdaEM approach on a wearable device prototype consisting of solar and motion energy harvesting using real-world data of user activities. Experiments show that AdaEM achieves solutions that are within 5% of the optimal with less than 0.005% execution time and energy overhead.

The Morning After: Sony reveals PlayStation VR2 specs


Of course, the year when many media outlets and companies decide to skip on attending CES in person, Sony decides this is the year to make some news at its press conference. While we got more news on its EV plans, and next-gen TVs, Tom Holland was also drafted into the showcase to promote the forthcoming Uncharted feature film. Then it hit us with a barrage of specs for the highly anticipated next-gen PlayStation VR headset. It will, of course, be compatible with the PS5 and the VR2 Sense controllers we've already seen. It will have a display resolution of 2,000 x 2,040 pixel per eye, a 110-degree field of view, and be capable of 90 to 120Hz frame rates, all while supporting 4K HDR.

These Will Be The Hot Topics At CES 2022


CES 2022 will put the spotlight on electric vehicles, digital health, the metaverse and other hot technologies when the trade show officially opens on Wednesday. But the resurgent Covid-19 pandemic threatens to overshadow the innovations on display. CES 2022 officially runs Jan. 5-7, but preshow media events begin on Monday. The upcoming show will be a hybrid event with an in-person conference in Las Vegas along with an online component for those who can't attend the physical show. On Friday, organizers shortened the physical show by one day.

Ring Video Doorbell 4 review: pre-roll is a battery bell gamechanger

The Guardian

The latest iteration of Amazon's battery-powered Ring doorbell adds a new feature to capture the early details of events most competitors would miss without needing to be plugged in. It tops Ring's battery-powered range, which starts at £89. The look and basic function of the Doorbell 4 is very similar to Ring's older models. It has a camera with night vision, motion sensors and a large doorbell button. When someone pushes the button Ring's signature chime plays and an alert is sent to your phone. You can view a live feed and speak through the doorbell using the app from anywhere with internet.

Ring Video Doorbell 4 review: Great for people deep in the Ring ecosystem; just good for everyone else


Ring now offers seven video doorbell models, and as you might have guessed, the company is running out of ways to differentiate them. The Ring Video Doorbell 4 looks virtually identical to the Ring Video Doorbell 3 (and the battery-only Ring Video Doorbell 2, for that matter), and it delivers the same 1080p resolution. Like the model 3, the Ring Video Doorbell 4 can operate on either battery power or your existing doorbell wiring, and both models support dual-band Wi-Fi networks (2.4- and 5GHz). That leaves color pre-roll video previews (more on that in a bit) as the only additional feature you'll get for the extra $20 in cost. As is typical of Ring home-security products, you'll need to sign up for a subscription to unlock all the Ring Video Doorbell 4's capabilities.

Get the Ring Video Doorbell 3 for cheap before Black Friday


SAVE $60: Get the Ring Video Doorbell 3 for just $139.99 through Nov. 4. Just because you're home all day doesn't mean you should skimp on home security. Video doorbells can help you with package deliveries, visitors, and keep your home safe and secure. Plus, it's a perfect product to let you get started on your dream smart home. The Ring Video Doorbell 3 is on sale in Best Buy's early Black Friday Deal for its Prime Day price of $139.99.

Ring 3 Plus vs. Ring (second-gen): Two new Ring video doorbells duke it out

USATODAY - Tech Top Stories

Since Ring launched its first video doorbell in 2014, the popular Amazon-owned smart home brand has dominated the smart doorbell market, churning out three new doorbells this year alone. That said, with so many smart video doorbells at your disposal, you might be scratching your head trying to make a decision. To help you in your quest, we're taking a closer look at the differences between two of Ring's most popular new releases: the Ring Video Doorbell (second-gen), an upgrade to Ring's original video doorbell, and the new Ring Video Doorbell 3 Plus. Here's how these two popular doorbells stack up. The Ring Video Doorbell (second-gen) is more affordable than the Ring Video Doorbell 3 Plus. Typically, video doorbells cost between $100 and $200, and Ring's most recent doorbell cameras pretty much hit this sweet spot.

The $100 Ring Video Doorbell gets a feature-packed upgrade, finally


Amazon-owned Ring has unleashed a few upgraded versions of the six-year-old Ring Video Doorbell over the years, including the $230 Video Doorbell 3 Plus that went on sale in April, yet the original $100 Ring Video Doorbell has remained on sale as a budget option. Now comes word that the $100 model is finally getting its own update. Available for pre-order now and slated to ship on June 3, the second-generation Ring Video DoorbellRemove non-product link will keep the original's $100 price tag while adding new features such as improved video resolution, privacy zones, an additional "near" motion zone, and more. Starting with the basics, the revamped Ring Video Doorbell boosts its video resolution to 1080p, versus 720p for the first-generation model, along with "crisper" night vision and "improved" two-way audio quality. The new Video Doorbell features "privacy zones" that let you specify areas in the camera's 155-degree field of view that you don't want recorded or displayed in the Ring App's live view, while an additional "near zone" allows for motion detection in areas that are between five and 15 feet in front of your home.

Ring Video Doorbell 2 review: deal with doorsteppers from your own sofa

The Guardian

The Ring Video Doorbell 2 adds the convenience of a front-door intercom to pretty much any home, and with minimal DIY skills required, meaning it's never been easier to get rid of doorsteppers. There have long been wifi-connected doorbells, for those envious of flat-dwelling friends with video intercoms adding that extra barrier between them and the outside world, but most of them require some sort of wiring to install. The Ring Video Doorbell 2 has a rechargeable battery, which means there's no need to wire it into the mains or a low voltage circuit. But is a rechargeable video doorbell actually any good? The Ring Video Doorbell 2 is essentially a big battery-powered doorbell with a camera in the top of it, which video calls your phone or tablet when someone presses the button.