Tag Archives: 419爱上海

Dang the rules for naming Jupiters new moons are super strict

by ,

first_img Hey @JupiterLunacy, you should name the newly discovered moon S/2018 J1 Pheraea. Pheraea was involved with Zeus, and their daughter was found and saved by a shepherd, or should I say Sheppard.  #NameJupitersMoons— Carnegie Science (@carnegiescience) February 21, 2019 13 Photos Post a comment But wait. There’s more. Each individual moon has more specific needs. Three of the moons are retrograde (they orbit in an opposite direction to Jupiter’s rotation) and must have names ending in “e,” while the other two must end in “a.”Carnegie wants the public to offers suggestions on Twitter by tweeting to @JupiterLunacy with the hashtag #NameJupitersMoons.Some of the suggestions so far don’t fit the brief, but one viable idea comes from Carnegie Science itself: Pheraea, one of Zeus’ lovers. I was ready to suggest Persephone, but there’s already an asteroid with that name. NASA view of Jupiter looks like an infamous South Park character NASA captures cosmic ‘dolphin’ swimming in Jupiter’s clouds Space Sci-Tech 0center_img Share your voice While the rules seem strict, there are some good reasons for them. The International Astronomical Union, which governs the names of space objects, already has a stringent list of requirements. The moon rules will also keep the new names on theme for Jupiter. Jupiter has 79 known moons, including famous satellites Europa and Io and the likes of Adrastea (Zeus’s foster mom) and Callisto (one of Zeus’s lovers).     We’re lucky there are so many characters in Roman and Greek mythology. As it turns out, sometimes a good name is hard to find. Jupiter swirls Tags Jaw-dropping Jupiter: NASA’s Juno mission eyes the gas giant Jupiter as seen by Hubble. Space Telescope Science Institute Polyphonte, this may be your time to shine.The Carnegie Institution for Science put out a call Thursday asking for the public’s help naming some recently discovered moons found orbiting Jupiter. But don’t get carried away. There are rules. Carnegie announced the 12 moons in mid-2018, and we get a say in draping monikers on five of them. Some of the ground rules are pretty straightforward: 16 characters or less, nothing offensive, nothing too similar to existing moon or asteroid names. You also can’t name them after a living person.Now the tunnel starts to narrow. The moons must be named after characters in Roman or Greek mythology who were either descendants of or lovers of Jupiter (Roman) or Zeus (Greek).  OK, maybe we can still work with that, even though that rules out calling any of them Elon, Moony McMoonFace or Buzz. last_img read more

Digitally printed cyanobacteria can power small electronic devices

by ,

first_img © 2017 Phys.org Explore further Demonstration of inkjet-printed bioenergy wallpaper. 1: Printed photosynthetic organisms in green; 2: Printed CNT anode; 3: Printed CNT cathode; 4: Paper substrate; 5: Solid medium. Credit: M. Sawa et al. Nature Communications The scientists, at Imperial College London and University of Cambridge, have published a paper on the new biophotovoltaic cell in a recent issue of Nature Communications.”Our biophotovoltaic device is biodegradable and in the future could serve as a disposable solar panel and battery that can decompose in our composts or gardens,” coauthor Marin Sawa at University of Arts London and Imperial College London told Phys.org. “Cheap, accessible, environmentally friendly, biodegradable batteries without any heavy metals and plastics—this is what we and our environment really need but don’t have just yet, and our work has shown that it is possible to have that.”In general, biophotovoltaic cells contain some type of cyanobacteria or algae that is phototrophic, meaning it converts light into energy. However, even in the dark these organisms continue to generate some energy by metabolizing their internal storage reserves. So when the organisms are connected to a non-biological electrode, they can function as either a “bio solar panel” when exposed to light or a “solar bio-battery” in the dark.Currently one of the biggest challenges facing biophotovoltaic cells is producing them on a large scale. Typically, the organisms are deposited onto an electrode surface from a bulky liquid reservoir. In the new study, the researchers demonstrated that inkjet printing can be used to print both the carbon nanotube electrode surface and the cyanobacteria on top of it, while allowing the bacteria to remain fully viable. This approach not only allows the cells to be fabricated quickly, but the set-up is also more compact and allows for greater precision in cell design.With these advantages, the inkjet-printed biophotovoltaic cells can generate a maximum current density that is 3-4 times higher than cells fabricated using conventional methods. To demonstrate, the researchers showed that nine connected cells can power a digital clock or generate flashes of light from an LED, illustrating the ability to produce short bursts of relatively high power. The researchers also showed that the cells can generate a continuous power output over the course of a 100-hour period consisting of light and dark cycles.In the future, the researchers plan to develop thin-film biophotovoltaic (BPV) panels and also explore potential applications as integrated power supplies in the areas of point-of-care medical diagnostics and environmental monitoring, both of which benefit from disposable, environmentally friendly biosensors. Another potential application is a bioenergy wallpaper.”The bioenergy wallpaper is a scaled-up application of our BPV system,” Sawa said. “The wallpaper will have carbon-based conductive patterns with electron-producing cyanobacteria. It turns an interior surface into an energy harvester to drive low-power applications like LED lights and/or biosensors, which can, for example, monitor indoor air quality.”The researchers also expect that the power output of the cells can be improved in a variety of ways, such as by improving circuit conductivity, optimizing cell design, and using more resilient organisms. More information: Sawa, M., Fantuzzi, A., Bombelli, P., Howe, C., Hellgardt, K., Nixon, P. “Electricity generation from digitally printed cyanobacteria.” Nature Communications. DOI: 10.1038/s41467-017-01084-4 This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.center_img (Phys.org)—Researchers have used a simple inkjet printer to print a “bio-ink” of cyanobacteria onto a conductive surface, creating a biophotovoltaic cell. Unlike conventional photovoltaic cells that operate only when exposed to light, the cyanobacteria can generate an electric current both in the dark and in response to light. The researchers expect that the cell may serve as an environmentally friendly power supply for low-power devices such as biosensors, and can even be scaled up to print a bioenergy wallpaper. Citation: Digitally printed cyanobacteria can power small electronic devices (2017, November 27) retrieved 18 August 2019 from https://phys.org/news/2017-11-digitally-cyanobacteria-power-small-electronic.html Researchers develop wallpaper bio-solar panel Journal information: Nature Communicationslast_img read more