A Tesla Roadster launched into space with a spacesuit-clad mannequin at the wheel has completed its first lap of the sun.
SpaceX, the aerospace company founded by Elon Musk, was blasted into orbit from Cape Canaveral last year and it is hoped that it will veer close to Mars and Earth during the course of its time among the stars.
According to tracking website Where Is Roadster?, the red sports car has now completed a solar orbit, having been cruising through the void for more than 18 months.
Who knew?
Not only are the batteries eco-friendly, but they are powerful as well. The researchers found a way to make them last longer and provide more electricity batteries by using silicon anodes — an electrode through which the current enters into an electrical device — instead of traditional graphite.
“Today graphite is used as the main commercial material for fabricating the anode electrodes,” Cengiz Ozkan, a professor of mechanical engineering at UC Riverside explained.
“We replaced graphite in the anodes with our new nanosilicon material derived from waste glass bottles,” he continued. “In the half-cell configuration, our batteries demonstrate performance about four times higher compared to graphite anode batteries.” Researchers at the University of California, Riverside’s Bourns College of Engineering used a three-step process to use a discarded glass bottle into lithium-ion batteries.
Homicide kills far more people than armed conflict, says new UNODC study
VIENNA/NEW YORK, 8 July (UN Information Service) – Some 464,000 people across the world were killed in homicides in 2017, surpassing by far the 89,000 killed in armed conflicts in the same period, according to the Global Study on Homicide 2019 published today by the United Nations Office on Drugs and Crime (UNODC).
“The Global Study on Homicide seeks to shed light on gender-related killings, lethal gang violence and other challenges, to support prevention and interventions to bring down homicide rates,” said UNODC Executive Director Yury Fedotov. “Countries have committed to targets under the Sustainable Development Goals to reduce all forms of violence and related death rates by 2030. This report offers important examples of effective community-based interventions that have helped to bring about improvements in areas afflicted by violence, gangs and organized crime.”
Posted in sustainability
Haidar el Ali’s reforestation project has planted 152 million mangrove buds in southern Senegal over the past decade!
SAN ANTONIO — April 8, 2019 — A team of Southwest Research Institute and General Electric (GE) engineers have designed, built and tested the highest temperature supercritical carbon dioxide (sCO2) turbine in the world. The turbine was developed with $6.8 million of funding from the U.S. Department of Energy (DOE) Solar Energy Technologies Office (SETO), in addition to $3 million from commercial partners GE Research, Thar Energy, Electric Power Research Institute, Aramco Services Company and Navy Nuclear Laboratory. Additionally, the DOE’s Advanced Research Projects Agency — Energy (ARPA-E) Full-Spectrum Optimized Conversion and Utilization of Sunlight (FOCUS) program provided financial support and extended the test program to validate advanced thermal seals.
Copyright © 2019 by the American Association for the Advancement of Science (AAAS)
On humans are many, and widespread across Earth. Respiratory and cardiovascular effects of air pollution have long been recognised, and account for the majority of air pollution-related deaths. There is also a strong link between poor air quality and the incidence of lung cancer.
Globally, ambient (outdoor) air pollution causes an estimated 25 per cent of all adult deaths from heart disease, 24 per cent from stroke, 43 per cent from chronic obstructive pulmonary disease and 29 per cent from lung cancer. Household (indoor) air pollution also leads to a wide variety of similar diseases and is one of the top five causes for premature death across the world. Current estimates put the death toll from household and ambient air pollution combined at 7 million deaths a year.
Hyundai is teasing a new 1970s-inspired electric car concept set to be unveiled at the IAA Frankfurt Motor Show next month.
Over the last few years, Hyundai has been going through a bit of a transition.
They are one of the few automakers still heavily invested in hydrogen fuel cell vehicles as the alternative to fossil fuels.
Mexico-based startup Biomitech has developed an artificial tree that it claims is capable of sucking up the equivalent amount of air pollution as 368 living trees. In doing so, it could be a game-changer for polluted cities lacking enough free space to plant a forest of real trees.
Self-assembled materials are attractive for next-generation materials, but their potential to assemble at the nanoscale and form nanostructures (cylinders, lamellae etc.) remains challenging. In a recent report, Xundu Feng and colleagues at the interdisciplinary departments of chemical and environmental engineering, biomolecular engineering, chemistry and the center for advanced low-dimension materials in the U.S., France, Japan and China, proposed and demonstrated a new approach to prevent the existing challenges. In the study, they explored size-selective transport in the water-continuous medium of a nanostructured polymer template formed using a self-assembled lyotropic H1 (hexagonal cylindrical shaped) mesophase (a state of matter between liquid and solid). They optimized the mesophase composition to facilitate high-fidelity retention of the H1 structure on photoinduced crosslinking.
The resulting nanostructured polymer material was mechanically robust with internally and externally crosslinked nanofibrils surrounded by a continuous aqueous medium. The research team fabricated a membrane with size selectivity at the 1 to 2 nm length scale and water permeabilities of ~10 liters m−2 hour−1 bar−1 μm. The membranes displayed excellent anti-microbial properties for practical use. The results are now published on Science Advances and represent a breakthrough for the potential use of self-assembled membrane-based nanofiltration in practical applications of water purification.
Membrane separation for filtration is widely used in diverse technical applications, including seawater desalination, gas separation, food processing, fuel cells and the emerging fields of sustainable power generation and distillation. During nanofiltration, dissolved or suspended solutes ranging from 1 to 10 nm in size can be removed. New nanofiltration membranes are of particular interest for low-cost treatment of wastewaters to remove organic contaminants including pesticides and metabolites of pharmaceutical drugs. State-of-the-art membranes presently suffer from a trade-off between permeability and selectivity where increased permeability can result in decreased selectivity and vice-versa. Since the trade-off originated from the intrinsic structural limits of conventional membranes, materials scientists have incorporated self-assembled materials as an attractive solution to realize highly selective separation without compromising permeability.
Any future colonization efforts directed at the Mars all share one problem in common; their reliance on a non-existent magnetic field. Mars’ magnetosphere went dark about 4 billion years ago when it’s core solidified due to its inability to retain heat because of its small mass. We now know that Mars was quite Earth-like in its history. Deep oceans once filled the now arid Martian valleys and a thick atmosphere once retained gasses which may have allowed for the development of simple life. This was all shielded by Mars’ prehistoric magnetic field.
When Mars’ magnetic line of defense fell, much of its atmosphere was ripped away into space, its oceans froze deep into the red regolith, and any chance for life to thrive there was suffocated. The reduction of greenhouse gasses caused Mars’ temperature to plummet, freezing any remaining atmosphere to the poles. Today, Mars is all but dead. Without a magnetic field, a lethal array of charged particles from the Sun bombards Mars’ surface every day threatening the potential of hosting electronic systems as well as biological life. The lack of a magnetic field also makes it impossible for Mars to retain an atmosphere or an ozone layer, which are detrimental in filtering out UV and high energy light. This would seem to make the basic principles behind terraforming the planet completely obsolete.
I’ve read a lot of articles about the potential of supplying Mars with an artificial magnetic field. By placing a satellite equipped with technology to produce a powerful magnetic field at Mars L1 (a far orbit around Mars where gravity from the Sun balances gravity from Mars, so that the satellite always remains between Mars and the Sun), we could encompass Mars in the resulting magnetic sheath. However, even though the idea is well understood and written about, I couldn’t find a solid mathematical proof of the concept to study for actual feasibility. So I made one!
