The use of Bitcoin causes around 22 megatons in CO2 emissions annually -- comparable to the total emissions of cities such as Hamburg or Las Vegas. That is the conclusion of the most detailed analysis to date of the cryptocurrency's carbon footprint. For their study, an interdisciplinary team of researchers at the Technical University of Munich (TUM) analyzed such data as the IPO filings of hardware manufacturers and the IP addresses of Bitcoin 'miners.'
UTokyo researchers have created an electronic component that demonstrates functions and abilities important to future generations of computational logic and memory devices. It is between one and two orders of magnitude more power efficient than previous attempts to create a component with the same kind of behavior. This fact could help it realize developments in the emerging field of spintronics.
"By combining organ-chip technology and human iPSC-derived tissue, we have created a neurovascular unit that recapitulates complex BBB functions, provides a platform for modeling inheritable neurological disorders, and advances drug screening, as well as personalized medicine," Ben-Gurion University researcher Dr. Vatine says.
Researchers have conducted the first analysis of Bitcoin power consumption based on empirical data from IPO filings and localization of IP addresses. They found that the cryptocurrency's carbon emissions measure up to those of Kansas City -- or a small nation. The study, published June 12 in the journal Joule, suggests that cryptocurrencies contribute to global carbon emissions, an issue that must be considered in climate change mitigation efforts.
By finding a certain kind of defect inside a block of diamond and fashioning a pattern of nanoscale pillars on the surface above it, Penn Engineering researchers can now control the shape of individual photons emitted by the defect. Because those photons carry information about the spin state of an electron, such a system could be used as the basis for compact quantum technologies.
A Vanderbilt researchers is combining her research on low-cost, nanostructured thin films with a device most American adults already own.
Theorized dark matter particles haven't yet shown up where scientists had expected them. So Berkeley Lab researchers are now designing new and nimble experiments that can look for dark matter in previously unexplored ranges of particle mass and energy, and using previously untested methods.
Oxide perovskite crystals have many interesting physical and chemical properties, and materials science engineers would like to fabricate them as two-dimensional layers for use in advanced electronics and, potentially, quantum computers. In a breakthrough, a team led by UCI's Xiaoqing Pan has figured out how to make flexible, free-standing layers of the material.
Cybersecurity researcher Karthik Pattabiraman, an associate professor of electrical and computer engineering at the University of British Columbia, has developed an automated program aimed at foiling smart meter hacking and boosting security in the smart grid.
A new 3-D printed thermoelectric device, which converts heat into electric power with an efficiency factor over 50% higher than the previous best for printed materials -- and is cheap to produce in bulk -- has been manufactured by researchers at Swansea University's SPECIFIC Innovation and Knowledge Centre.