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Category: Aerospace Engineering

Fight the Virus: Design a New Ventilation System

When it comes to warding off COVID-19, suppression and mitigation are the two key health measures based on epidemiological modelling. These two strategic non-pharmaceutical interventions—championed by policymakers and health authorities to reduce contact rates in the population, and thereby reduce transmission of the virus—distinctly include a recommendation to avoid discretionary travel to protect against the spread of airborne pathogens. According to Qingyan Chen, a Purdue University air quality expert, air conditioning systems in small spaces are not designed to filter…

To make ultra-black materials that won’t weigh things down, consider the butterfly — ScienceDaily

Set against a piece of black construction paper, the wings of the male cattleheart butterfly look even blacker than black. “Some animals have taken black to an extreme,” said Alex Davis, a graduate student in the lab of Duke University biologist Sönke Johnsen. The butterflies they study are 10 to 100 times darker than charcoal, fresh asphalt, black velvet and other everyday black objects. As little as 0.06% of the light that hits them is reflected back to the eye.…

Celebrating International Women’s Day: Meet the Women Building Uber’s Global Platform

Around the world, Uber’s technical teams build the platforms that power our dynamic suite of mobility services, from food delivery and freight to ridesharing and scooter rentals. These engineers, data scientists, product managers, program managers, and many other technologists both ship the products our customers rely on and support the operational needs of our rapidly growing company. Part of what makes Uber special is the diversity of perspectives and backgrounds that make up our workforce. To celebrate International Women’s Day,…

Keeping Up with Advances in Capacitor Technology

Capacitors. These seemingly simple devices are an integral part of virtually every electronic design. It’s been noted that capacitors account for more items in most circuit bills-of-material (BOMs) than any other component. This is certainly true when it comes to power-conversion systems. And with the advent of higher-frequency power conversion, just as with magnetic components, a range of technical issues must be addressed in both the design and selection of capacitors. The Power Sources Manufacturers Association’s (PSMA) Capacitor Committee and…

Atomic vacancy as quantum bit — ScienceDaily

Although boron nitride looks very similar to graphene in structure, it has completely different optoelectronic properties. Its constituents, the elements boron and nitrogen, arrange — like carbon atoms in graphene — a honeycomb-like hexagonal structure. They arrange themselves in two-dimensional layers that are only one atomic layer thick. The individual layers are only weakly coupled to each other by so-called van der Waals forces and can therefore be easily separated from each other. Physicists from Julius-Maximilians-Universität Würzburg (JMU) in Bavaria,…

What it Takes to be a Commercial Aviation Jet Engine Lubricant

Lubricants used in the aviation world are subject to significantly different performance demands than those in other industries. Those demands also change as the engine and airframe designs change. So, as aircraft equipment evolves, so do the lubricants. Also, the restrictive and regimented regulatory environment for aviation is like nothing else. The Tasks Lubricants handle many important functions in jet engines. The most important is absorbing and removing heat from bearings. Heat then gets passed from the lubricant to the…

Smartphones, smart cars, smart… bandages?

Xueju “Sophie” Wang and Carolyn Crumley collaborated to develop a sensor-integrated bandage that can help improve healing rates for people with diabetic foot ulcers. COLUMBIA, Mo. – Nerve damage that leads to a loss of feeling or numbness in the feet is a big problem for the millions of Americans living with diabetes. As a result, foot ulcers can go untreated leading to infections and even amputations. Now, researchers at the University of Missouri are developing a bandage with “smart” capabilities…

Quadrupling turbines, US can meet 2030 wind-energy goals — ScienceDaily

The United States could generate 20% of its electricity from wind within 10 years, without requiring any additional land, according to Cornell University research published in Nature Scientific Reports. “The United States currently produces about 7% of its electricity from wind energy,” said Sara Pryor, professor in the Department of Earth and Atmospheric Sciences. “This research shows that a quadrupling of the installed capacity of wind turbines from 2014 levels will allow us to attain the goal of 20% of…

Analysis of a portion of the data looks at nearby stars that could see Earth transiting sun — ScienceDaily

The Breakthrough Listen Initiative today (Friday, Feb. 14) released data from the most comprehensive survey yet of radio emissions from the plane of the Milky Way Galaxy and the region around its central black hole, and it is inviting the public to search the data for signals from intelligent civilizations. At a media briefing today in Seattle as part of the annual meeting of the American Association for the Advancement of Science (AAAS), Breakthrough Listen principal investigator Andrew Siemion of…

Arduino for the Pros | Electronic Design

The FCC’s auction, over the last five years, of L-band (1.4 to 1.8 GHz) and S-band (2.2 to 2.4 GHz) microwave frequencies to commercial broadband providers is driving a mandatory migration to the less-populated C-band (4.4 to 5.2 GHz) frequency by U.S. military test ranges (see figure). These test ranges historically used L/S spectrum for telemetering aircraft and missiles. The auctions provided $2 billion of spectrum reallocation funding. It was funneled to test ranges across the country to fund the…