New method generates precisely controlled graphene microbubbles with perfectly spherical curvature for lenses — ScienceDaily

Tiny bubbles can solve large problems. Microbubbles — around 1-50 micrometers in diameter — have widespread applications. They’re used for drug delivery, membrane cleaning, biofilm control, and water treatment. They’ve been applied as actuators in lab-on-a-chip devices for microfluidic mixing, ink-jet printing, and logic circuitry, and in photonics lithography and optical resonators. And they’ve contributed remarkably to biomedical imaging and applications like DNA trapping and manipulation.

Given the broad range of applications for microbubbles, many methods for generating them have been developed, including air stream compression to dissolve air into liquid, ultrasound to induce bubbles in water, and laser pulses to expose substrates immersed in liquids. However, these bubbles tend to be randomly dispersed in liquid and rather unstable.

According to Baohua Jia, professor and founding director of the Centre for Translational Atomaterials at Swinburne University of Technology, “For applications requiring precise bubble position and size, as well as high

Read More
Read More

Amazon Luna, spherical Echo speakers, Fire TV, a flying Ring camera and more: Every new product announced this fall

Amazon surprised us at its Fall Devices and Services event with its new Luna cloud-gaming service, along with the expected updates to its line of Echo, Fire TV and Ring products. The event helps Amazon generate buzz as we roll into the holiday shopping season, and for the first time, Prime Day. (The annual sale is usually held in July, but this year it is slated to start on Oct. 13.) That means putting Alexa everywhere — inside homes and out — and addressing privacy concerns, which were big storylines in 2019 for both Ring and Alexa. In today’s life-at-home existence, with millions of us hunkered down for the long haul, the connected house concepts that Amazon has been developing for years have become more relevant than ever. 

screen-shot-2020-09-24-at-1-09-09-pm.png

Amazon/Screenshot by Caitlin Petrakovitz/CNET

The company’s Echo and Fire TV products will be its first to earn sustainability badges, and

Read More
Read More

Amazon launches spherical Echo and flying camera drone

Amazon has announced a full range of new spherical Echo devices, new motorised smart display, a camera drone that flies around your house, a game-streaming service and more.



Photograph: Amazon


© Provided by The Guardian
Photograph: Amazon

In a streaming presentation, the firm showed off a smorgasbord of new devices from its various brands, including Ring, Eero Fire and Echo.



a close up of a ball: The new 2020 Amazon Echo is a fabric covered ball with improved sound. Photograph: Amazon


© Provided by The Guardian
The new 2020 Amazon Echo is a fabric covered ball with improved sound. Photograph: Amazon

The new standard Echo ditches its cylindrical shape for a fabric-covered ball design with Amazon’s characteristic light-ring in the base to indicate when it is listening to you. It has a new 3in woofer and two tweeters with Dolby processing for stereo sound and automatic adjustment to the acoustics of your room.



Next generation Amazon Echo is a fabric-covered sphere while new Ring Always Home Cam can fly around your house to record security events.


© Photograph: Amazon
Next generation Amazon Echo is a fabric-covered sphere while new Ring Always Home Cam can fly around

Read More
Read More

Amazon unveils spherical Echo speakers, flying indoor security camera, and cloud gaming service

Amazon unveiled a new lineup of spherical Echo devices, an autonomous flying indoor Ring security camera, a new cloud gaming service, and new features to help Alexa converse and interact more naturally with users.

The flurry of news came Thursday morning during the company’s annual Devices & Services event, a virtual version of a fall tradition in which the company typically shows its newest Echo speakers and other Alexa-enabled devices.

Luna, the cloud gaming service, will cost $5.99/month during an early access period. It will be available on Fire TV, Mac, Windows PCs, iOS and later Android, going head-to-head with similar offerings from Microsoft and Google. Amazon will offer a dedicated game controller for the service, available for $49.99, which connects directly to the cloud to let gamers switch quickly between devices. Games can also be played with a keyboard and mouse or a Bluetooth game controller. Luna integrates with

Read More
Read More