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Category: Computer Engineering

In first, 3-D printed objects connect to WiFi without electronics

UW engineers have developed the first 3-D printed plastic objects that can connect to other devices via WiFi without using any electronics. The 3-D printed attachment above can sense how much laundry soap is being used — and automatically order more when the bottle is running low. Credit: Mark Stone/University of Washington Imagine a bottle of laundry detergent that can sense when you’re running low on soap—and automatically connect to the internet to place an order for more. University of…

OAuth with PHP Part Two: refreshing & revoking tokens

This is a follow up to part 1 that talks about creating access tokens from authorization codes. At the end of the first part of our PHP journey with OAuth, we had two scripts: an index.php that would begin the OAuth process and a callback.php that would accept the result from Square and use the provided authorization code to create an access token that your application can use to use Square’s APIs on a merchant’s behalf. Your newly minted access…

Recent web performance fixes on Airbnb listing pages

We have been hard at work migrating the airbnb.com core booking flow into a single-page server-rendered app using React Router and Hypernova. At the beginning of the year, we rolled this out for the landing page and search results with good success. Our next step is to expand the single-page app to include the listing detail page. airbnb.com listing detail page: https://www.airbnb.com/rooms/8357 This is the page you visit when deciding which listing to book. Throughout your search, you might visit…

Panasonic develops unique vacuum insulated glass based on its plasma display panel technology

Credit: Panasonic Panasonic Corporation today announced it has developed and succeeded in mass production of thin, high-performance vacuum insulated glass by applying technologies the company accumulated in the development and manufacturing of plasma display panels (PDPs). The glass achieves a heat transfer coefficient (Ug value) of 0.7 (W/m²K), the industry’s top-class insulation performance for glass with a total thickness of 6 mm, which is equal to or greater than triple glass containing argon gas with a total thickness of about…

A smart, portable and miniaturized system that can analyze sweat

Credit: EPFL / Alain Herzog EPFL researchers have teamed up with startup Xsensio to develop a tiny, fully portable system that can encapsulate and analyze biomarkers in a person’s sweat. The low-power system, which fits on a chip measuring under 1 cm2, was presented this week at the International Electron Devices Meeting (IEDM) in San Francisco. The miniature chip was developed by researchers at EPFL’s Nanoelectronic Devices Laboratory (Nanolab), headed by Professor Adrian Ionescu, working in association with startup Xsensio.…

Things You Should Know About Arc Flashing at High Voltages

Arc flashing is a serious issue in electrical systems involving medium and high AC voltages. Any time there is a electrical system that utilizes high voltages, the design of the wires must include thick enough insulation to prevent a flash over from occurring. Unfortunately, preventing this from occurring does not end after the design. There are many reasons that arcing can happen. The following are a few things to understand about this phenomenon as well as a few things to…

IPvlan overlay-free Kubernetes Networking in AWS

Lyft is pleased to announce the initial open source release of our IPvlan-based CNI networking stack for running Kubernetes at scale in AWS. cni-ipvlan-vpc-k8s provides a set of CNI and IPAM plugins implementing a simple, fast, and low latency networking stack for running Kubernetes within Virtual Private Clouds (VPCs) on AWS. Background Today Lyft runs in AWS with Envoy as our service mesh but without using containers in production. We use a home-grown, somewhat bespoke stack to deploy our microservice…

NEST360’s low-cost jaundice detector passes first test in Africa

BiliSpec is a low-cost, battery-powered reader designed to diagnose jaundice by immediately quantifying serum bilirubin levels from a small drop of whole blood. Credit: Jeff Fitlow/Rice University The first clinical study of a low-cost, hand-held jaundice detector invented by Rice University students couldn’t have come at a better time for NEST360°, an international team of scientists, doctors and global health experts preparing for a Dec. 11 competition for $100 million from the MacArthur Foundation. The money would allow the team to…

Research finds that consuming encapsulated placentas has little to no effect on postpartum mood and maternal bonding; detectable changes shown in hormones — ScienceDaily

A groundbreaking study by UNLV researchers shows that taking placenta capsules has little to no effect on postpartum mood, maternal bonding, or fatigue, when compared to a placebo. Consuming the placenta (in pill form) following childbirth is an increasingly popular trend in industrial countries, such as the United Kingdom, France, Germany, Australia, and the United States. Although precise estimates are not yet available, most experts agree there are many thousands of women in the U.S. alone who practice maternal placentophagy.…

cDC2 dendritic cells key to vaccine effectiveness — ScienceDaily

In vaccination, a certain subpopulation of dendritic cells is vital to triggering the body’s adaptive immune system, report researchers at The Jackson Laboratory (JAX), Yale University and Astra-Zeneca. Their findings have important implications for vaccine delivery, as the usual method, intramuscular injection, is likely not the most effective way to target those dendritic cells. Vaccines train the immune system to fight a given pathogen (e.g., bacteria or virus), known generally as an antigen, by simulating a natural infection. When an…