Archive for the ‘engineering’ category: Page 8

Jun 29, 2023

Combining nuclear and solar tech could make a powerful pair

Posted by in categories: engineering, nuclear energy, policy, solar power, sustainability

In energy policy debates, nuclear energy and renewable energy technologies are sometimes viewed as competitors.

In reality, they could be better, together.

At the University of Wisconsin-Madison, Ben Lindley, an assistant professor of engineering physics and an expert on nuclear reactors, and Mike Wagner, an assistant professor of mechanical engineering and a solar energy expert, are studying the feasibility and benefits of such a coupling.

Jun 28, 2023

Researchers observe rubber-like elasticity in liquid glycerol for the first time

Posted by in categories: biological, engineering

Simple molecular liquids such as water or glycerol are of great importance for technical applications, in biology or even for understanding properties in the liquid state. Researchers at the Max Planck Institut für Struktur und Dynamik der Materie (MPSD) have now succeeded in observing liquid glycerol in a completely unexpected rubbery state.

In their article published in Proceedings of the National Academy of Sciences, the researchers report how they created rapidly expanding on the surface of the liquid in vacuum using a pulsed laser. However, the thin, micrometers-thick liquid envelope of the bubble did not behave like a viscous liquid dissipating deformation energy as expected, but like the elastic envelope of a rubber toy balloon, which can store and release elastic energy.

It is the first time an elasticity dominating the flow behavior in a Newtonian liquid like glycerol has been observed. Its existence is difficult to reconcile with common ideas about the interactions in liquid glycerol and motivates the search for more comprehensive descriptions. Surprisingly, the elasticity persists over such long timescales of several microseconds that it could be important for very rapid engineering applications such as micrometer-confined flows under . Yet, the question remains unsettled whether this behavior is a specific property of liquid glycerol, or rather a phenomenon that occurs in many molecular liquids under similar conditions but has not been observed so far.

Jun 26, 2023

Northrop Grumman women are at forefront of space exploration

Posted by in categories: engineering, space travel

Image credit: NASA

To mark International Women in Engineering Day (INWED), prime STEM employer Northrop Grumman celebrated some of its women engineers like Sally Richardson, Jill Eskew and Erica Sandoval who are Defining Possible for the next generation, and helping put the first woman on the Moon.

Jun 25, 2023

Key Protein Vital for Structural Integrity of Neurons — Without It Axons Break, Synapses Die

Posted by in categories: education, engineering, neuroscience

Scientists find a protein common to flies and people is essential for supporting the structure of axons that neurons project to make circuit connections.

In a study conducted by MIT

MIT is an acronym for the Massachusetts Institute of Technology. It is a prestigious private research university in Cambridge, Massachusetts that was founded in 1861. It is organized into five Schools: architecture and planning; engineering; humanities, arts, and social sciences; management; and science. MIT’s impact includes many scientific breakthroughs and technological advances. Their stated goal is to make a better world through education, research, and innovation.

Jun 24, 2023

New Study could help Unlock ‘Game-Changing’ Batteries for Electric Vehicles and Aviation

Posted by in categories: chemistry, energy, engineering, sustainability, transportation

Significantly improved electric vehicle (EV) batteries could be a step closer thanks to a new study led by University of Oxford researchers, published today in Nature. Using advanced imaging techniques, this revealed mechanisms which cause lithium metal solid-state batteries (Li-SSBs) to fail. If these can be overcome, solid-state batteries using lithium metal anodes could deliver a step-change improvement in EV battery range, safety and performance, and help advance electrically powered aviation.

One of the co-lead authors of the study Dominic Melvin, a PhD student in the University of Oxford’s Department of Materials, said: ‘Progressing solid-state batteries with lithium metal anodes is one of the most important challenges facing the advancement of battery technologies. While lithium-ion batteries of today will continue to improve, research into solid-state batteries has the potential to be high-reward and a gamechanger technology.’

Li-SSBs are distinct from other batteries because they replace the flammable liquid electrolyte in conventional batteries with a solid electrolyte and use lithium metal as the anode (negative electrode). The use of the solid electrolyte improves the safety, and the use of lithium metal means more energy can be stored. A critical challenge with Li-SSBs, however, is that they are prone to short circuit when charging due to the growth of ‘dendrites’: filaments of lithium metal that crack through the ceramic electrolyte. As part of the Faraday Institution’s SOLBAT project, researchers from the University of Oxford’s Departments of Materials, Chemistry and Engineering Science, have led a series of in-depth investigations to understand more about how this short-circuiting happens.

Jun 23, 2023

The chip patterning machines that will shape computing’s next act

Posted by in categories: computing, engineering

The first lithography tools were fairly simple, but the technologies that produce today’s chips are among humankind’s most complex inventions.

When we talk about computing these days, we tend to talk about software and the engineers who write it. But we wouldn’t be anywhere without the hardware and the physical sciences that have enabled it to be created—disciplines like optics, materials science, and mechanical engineering. It’s thanks to advances in these areas that we can fabricate the chips on which all the 1

Semiconductor lithography, the manufacturing process responsible for producing computer… More.

Jun 23, 2023

Researchers solve temperature problem for source-gated transistors

Posted by in categories: computing, engineering, nanotechnology

Low-cost, flexible displays that use very little energy could be a step closer, thanks to an innovation from the University of Surrey that solves a problem that has plagued source-gated transistors (SGT). The study has been published by IEEE Transactions on Electron Devices.

Dr. Radu Sporea, project lead from the University of Surrey, said, We used a rapidly emerging semiconductor material called IGZO or indium-gallium-zinc oxide to create the next generation of source-gated transistors. Through nanoscale contact engineering, we obtained transistors that are much more stable with temperature than previous attempts. Device simulations allowed us to understand this effect.

This new design adds to SGTs and retains usual benefits like using low power, producing high signal amplification, and being more reliable under different conditions. While source-gated transistors are not mainstream because of a handful of performance limitations, we are steadily chipping away at their shortcomings.

Jun 22, 2023

NASA volunteers are about to enter simulated Mars habitat

Posted by in categories: engineering, habitats, health, space travel

Four volunteers are about to enter a simulated Mars habitat where they’ll spend the next 378 days as part of ongoing preparations for the first crewed mission to the faraway planet.

The specially designed, enclosed habitat at NASA’s Johnson Space Center in Houston, Texas, will host Alyssa Shannon, Ross Brockwell, Kelly Haston, and Nathan Jones from Sunday, June 25. The team’s experience spans science, engineering, and health, and each member will use their specific skills during their stay.

The mission will be the first of three one-year Mars surface simulations, called CHAPEA (Crew Health and Performance Exploration Analog).

Jun 22, 2023

Using electric fields to control the movement of defects in crystals

Posted by in categories: computing, engineering

An international team of researchers, led by University of Toronto Engineering Professor Yu Zou, is using electric fields to control the motion of material defects. This work has important implications for improving the properties and manufacturing processes of typically brittle ionic and covalent crystals, including semiconductors—a crystalline material that is a central component of electronic chips used for computers and other modern devices.

In a new study published in Nature Materials, researchers from University of Toronto Engineering, Dalhousie University, Iowa State University and Peking University, present real-time observations of dislocation motion in a single-crystalline that was controlled using an external electric field.

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Jun 22, 2023

The Insane Engineering of MRI Machines

Posted by in categories: biotech/medical, engineering

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