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Engineering News

Reconstructing global climate through Earth’s history — ScienceDaily

A key component when forecasting what the Earth’s climate might look like in the future is the ability to draw on accurate temperature records of the past. By reconstructing past latitudinal temperature gradients (the difference in average temperature between the equator and the poles) researchers can predict where, for example, the jet stream, which controls storms and temperatures in the mid-latitudes (temperate zones between the tropics and the polar circles), will be positioned. The trouble is, many of the existing…

Scientists develop artificial intelligence system for high precision recognition of hand gestures

(Left to Right) Members of the NTU study include research fellow Pan Shaowu, Professor Chen Xiaodong, Director of the Innovative Centre for Flexible Devices (iFLEX) and first author Wang Ming from the School of Materials Science & Engineering. Credit: NTU Singapore Scientists from Nanyang Technological University, Singapore (NTU Singapore) have developed an Artificial Intelligence (AI) system that recognizes hand gestures by combining skin-like electronics with computer vision. The recognition of human hand gestures by AI systems has been a valuable…

Under pressure, nontoxic salt-based propellant performs well

This photo shows combustion structure of 80 percent HAN-water at 3.0, 6.0, and 10.0 Mpa. Credit: University of Illinois Dept. of Aerospace Engineering In smaller spacecraft such as CubeSat satellites, a salt-based monopropellant is showing promise. It can be used both in high-thrust chemical propulsion for fast time-sensitive maneuvers, and electric mode for slow maneuvers, such as orbit maintenance. Now, researchers in the Department of Aerospace Engineering at the University of Illinois at Urbana-Champaign have more knowledge about how it…

Fireflies shed light on the function of mitochondria — ScienceDaily

Tiny factories float inside our cells and provide them with almost all the energy they need: the mitochondria. Their effectiveness decreases when we get older, but also when we face many diseases such as diabetes, cancer or Parkinson’s. This is why scientists are increasingly interested in how they work. At EPFL, a team has developed a protocol to measure their activity live in living animals. Described in Nature Chemical Biology, the method relies on the molecule responsible for the firefly’s…

New super-resolution method reveals fine details without constantly needing to zoom in — ScienceDaily

Since the early 1930s, electron microscopy has provided unprecedented access to the alien world of the extraordinarily small, revealing intricate details that are otherwise impossible to discern with conventional light microscopy. But to achieve high resolution over a large specimen area, the energy of the electron beams needs to be cranked up, which is costly and detrimental to the specimen under observation. Texas A&M University researchers may have found a new method to improve the quality of low-resolution electron micrographs…

Microcontroller Sends Voltage and Frequency via Low-Cost Modules

Download this article in PDF format. This project pairs a set of 8-bit microcontrollers with a 433-MHz industrial, scientific and medical (ISM) band transmitter/receiver. The FS1000A RF transmitter has a range of up to 200 m; the XY-MK-5V RF receiver operates at 5 V and uses only 4 mA (Fig. 1). These modules are readily available and used in projects with platforms like Arduinos. 1. The FS1000A RF transmitter (right) has a range of up to 200 m. The XY-MK-5V…

Coffee stains inspire optimal printing technique for electronics

Particle trajectories of drying droplets, with red arrows showing the trajectory end. Credit: Tawfique Hasan Have you ever spilled your coffee on your desk? You may then have observed one of the most puzzling phenomena of fluid mechanics—the coffee ring effect. This effect has hindered the industrial deployment of functional inks with graphene, 2-D materials, and nanoparticles because it makes printed electronic devices behave irregularly. Now, after studying this process for years, a team of researchers have created a new…

IR Camera Captures Defects in 3D Printing

Small defects in 3D printed metal parts limit their performance and are roadblocks preventing the technology from being more widely used. Researchers at Argonne National Laboratory theorized that the defects stemmed from small voids in the cooled printed metal. The voids (porosity) can make printed components prone to cracking and other failures. To check their theory, they used a 3D printer with an IR camera, a common option, to film the printing process from above. It monitored and recorded temperature…

The technology behind fighting harassment on LinkedIn

Co-authors: Grace Tang, Montinee Khunvirojpanich, and Ting Chen LinkedIn is an active professional community where our members come to stay informed, build meaningful relationships, and find a job. In order for members to confidently engage in this community, they have to feel safe. This sense of safety is at risk when spam, inappropriate, or harassing content is shared on the platform. This content is not tolerated on LinkedIn, and we have rolled out proactive and reactive measures that employ a combination…