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Category: Electrical Engineering

New algorithm mimics electrosensing in fish

Credit: Unsplash/CC0 Public Domain While humans may struggle to navigate a murky, turbid underwater environment, weakly electric fish can do so with ease. These aquatic animals are specially adapted to traverse obscured waters without relying on vision; instead, they sense their environment via electric fields. Now, researchers are attempting to adapt these electrosensing techniques to improve underwater robotics. Scientists have spent years studying how weakly electric fish—including the knife fish and elephantnose fish—utilize electricity for navigation. These fish have specialized…

Fish-inspired robots coordinate movements without any outside control

These fish-inspired robots can synchronize their movements without any outside control. Based on the simple production and detection of LED light, the robotic collective exhibits complex self-organized behaviors, including aggregation, dispersion and circle formation. Credit: Self-organizing Systems Research Group Schools of fish exhibit complex, synchronized behaviors that help them find food, migrate and evade predators. No one fish or team of fish coordinates these movements nor do fish communicate with each other about what to do next. Rather, these collective…

Seawater as an electrical cable? Wireless power transfers in the ocean

Credit: CC0 Public Domain Associate professor Masaya Tamura, Kousuke Murai (who has completed the first term of his master’s program), and their research team from the Department of Electrical and Electronic Information Engineering at Toyohashi University of Technology have successfully transferred power and data wirelessly through seawater by using a power transmitter/receiver with four layers of ultra-thin, flat electrodes. In the field of wireless power transfers, seawater behaves as a dielectric with extremely high loss, and achievement through capacitive coupling…

Flexible thermoelectric devices enable energy harvesting from human skin

Conceptual illustration of a compliant TEG with soft electrodes and soft heat conductors (s-HCs) for self-powered circuit applications. The left inset is a photograph of bismuth telluride (Bi2Te3)-based thermoelectric (TE) legs and the right inset is an optical image of a cross-section of the compliant TEG. Scale bars, 5 and 1 mm. Credit: Korea Institute of Science and Technology (KIST) A thermoelectric device is an energy conversion device that uses the voltage generated by the temperature difference between both ends…

Call for Service: Hydraulic Hose Repair

At a Glance: A prospect to service the heavily industrialized areas of Detroit turns into a business opportunity. Pirtek’s business model is built around equipping mobile service vehicles so technicians can visit sites to replace failed hoses on industrial and mobile hydraulic machinery. A mobile technician’s inventory covers 90% of the work they can perform on site. The business’ value proposition is that it runs 24/7 with a one-hour ETA. When the world was subjected to the COVID-19 pandemic last…

Building-in Better Reliability for High-Performance SiC MOSFETs

What you’ll learn: The impact of materials on designing reliable devices. How packaging plays an important role in SiC MOSFET design. Determining the FIT rate for SiC MOSFETs. There’s no doubt that the material properties of wide-bandgap materials like silicon carbide (SiC) allow for higher performance than silicon-based (Si) structures. But matching or even exceeding the reliability of Si devices requires innovations in design and rigorous test and evaluation to meet customer requirements. SiC’s advantage in power switching designs is…

Japan Aims to Eliminate Gas- Powered Vehicles by Mid-2030s

What you’ll learn: Japan will attempt to remove all gasoline-powered vehicles in approximately 15 years. To accelerate the spread of electric vehicles, the government targets slashing the cost of vehicle batteries by more than half to 10,000 yen (US $96.34) or less per kilowatt hour by 2030. The COVID-19 pandemic has done little to reduce the world’s carbon emissions. Despite a brief dip in carbon-dioxide emissions, the world is still heading for a temperature rise in excess of 3°C this…

Diamonds Could Replace Silicon in Some Semiconductors

Many companies working on next-generation nuclear reactors lack the infrastructure, lab facilities and computer models needed to collect the data required to prove to the U.S. Nuclear Regulatory Commission (NRC) that their designs are safe and will work. To give some of these companies a leg up, the U.S. Energy Dept. recently awarded $30 million in initial funding to each of five U.S. teams so they can address the technical, operational and licensing challenges in bringing their designs to market.…

Nearly 300,000 deaths could be averted, depending on how severe isolation measures become — ScienceDaily

This summer, when bars and restaurants and stores began to reopen across the United States, people headed out despite the continuing threat of COVID-19. As a result, many areas, including the St. Louis region, saw increases in cases in July. Using mathematical modeling, new interdisciplinary research from the lab of Arye Nehorai, the Eugene & Martha Lohman Professor of Electrical Engineering in the Preston M. Green Department of Electrical & Systems Engineering at Washington University in St. Louis, determines the…

Evolving Power over Ethernet Expands Power Distribution

What you’ll learn: Advantages of Power over Ethernet in the context of industrial Ethernet. PoE standards continue to evolve to keep pace with increasing power demands. Driver for standards updating is the potential movement toward Gigabit Ethernet.   Industrial Ethernet has disrupted factory automation through its improvement in speed and latency performance. Engineers achieve these conditions by employing 100-Mb/s fast Ethernet in switch mode with full-duplex capability. This design unlocks point-to-point device connectivity, creating an Ethernet solution to help manage…