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ข่าวที่ 1 - 20 จากทั้งหมด 2052
Researchers develop viable, environmentally-friendly alternative to Styrofoam
Washington State University researchers have developed an environmentally-friendly, plant-based material that for the first time works better than Styrofoam for insulation. The foam is mostly made from nanocrystals of cellulose, the most abundant plant material on earth. The researchers also developed an environmentally friendly and simple manufacturing process to make the foam, using water as a solvent instead of other harmful solvents. The work, led by Amir Ameli, assistant professor in the School of Mechanical and Materials Engineering, and Xiao Zhang, associate professor in the Gene and Linda School of Chemical Engineering and Bioengineering, is published in the journal Carbohydrate Polymers....
Reversible chemistry clears path for safer batteries
Researchers at the University of Maryland (UMD) and US Army Research Lab (ARL) have taken a critical step on the path to high energy batteries by improving their water-in-salt battery with a new type of chemical transformation of the cathode that creates a reversible solid salt layer, a phenomenon yet unknown in the field of water-based batteries....
Radical desalination approach may disrupt the water industry
Hypersaline brines—water that contains high concentrations of dissolved salts and whose saline levels are higher than ocean water—are a growing environmental concern around the world. Very challenging and costly to treat, they result from water produced during oil and gas production, inland desalination concentrate, landfill leachate (a major problem for municipal solid waste landfills), flue gas desulfurization wastewater from fossil-fuel power plants, and effluent from industrial processes. If hypersaline brines are improperly managed, they can pollute both surface and groundwater resources. But if there were a simple, inexpensive way to desalinate the brines, vast quantities of water would be available for all kinds of uses, from agriculture to industrial applications, and possibly even for human consumption....
Plastic gets a do-over: Breakthrough discovery recycles plastic from the inside out
Scientists have made a next-generation plastic that can be recycled again and again into new materials of any color, shape, or form. Researchers have designed a recyclable plastic that can be disassembled into its constituent parts at the molecular level, and then reassembled into a different shape, texture, and color again and again without loss of performance or quality.....
MIT and NASA engineers demonstrate a new kind of airplane wing
A team of engineers has built and tested a radically new kind of airplane wing, assembled from hundreds of tiny identical pieces. The wing can change shape to control the plane's flight, and could provide a significant boost in aircraft production, flight, and maintenance efficiency, the researchers say.....
Methane-consuming bacteria could be the future of fuel
Known for their ability to remove methane from the environment and convert it into a usable fuel, methanotrophic bacteria have long fascinated researchers. But how, exactly, these bacteria naturally perform such a complex reaction has been a mystery. Now an interdisciplinary team at Northwestern University has found that the enzyme responsible for the methane-methanol conversion catalyzes this reaction at a site that contains just one copper ion. This finding could lead to newly designed, human-made catalysts that can convert methane—a highly potent greenhouse gas—to readily usable methanol with the same effortless mechanism.....
ทีมนักวิจัยด้านวัสดุศาสตร์และวิศวกรรมจากมหาวิทยาลัยแคลิฟอร์เนีย วิทยาเขตลอสแอนเจลิส (ยูซีแอลเอ) ของสหรัฐฯ ได้ความคิดแปลกแหวกแนวในการพัฒนาเซลล์สุริยะ หลังจากที่สมาชิกในทีมผู้หนึ่งดื่มกาแฟยามเช้าและพูดติดตลกกับเพื่อนร่วมงานว่า เซลล์สุริยะก็อาจจะต้องการตัวช่วยเพิ่มพลังในการทำงาน เหมือนกับที่กาเฟอีนช่วยให้คนเราสดชื่นกระปรี้กระเปร่าขึ้นเช่นกัน มีการทดลองใช้กาเฟอีน (Caffeine) ทำปฏิกิริยากับแร่เพอรอฟสไกต์ (Perovskite) ซึ่งเป็นวัสดุเก็บเกี่ยวแสงที่ใช้ในการผลิตเซลล์สุริยะชนิดหนึ่ง หลังจากที่ทีมผู้วิจัยนึกขึ้นได้ว่าสารกระตุ้นกาเฟอีนในกาแฟเป็นสารประกอบอัลคาลอยด์ ซึ่งมีโครงสร้างโมเลกุลที่อาจจะทำปฏิกิริยากับแร่ดังกล่าวและเพิ่มประสิทธิภาพในการเปลี่ยนแสงเป็นพลังงานไฟฟ้าได้มากขึ้น....
Your future air conditioner might do way more than just cool your house
Roland Dittmeyer, an engineer at Germany's Karlsruhe Institute of Technology, sees a lot of potential here. AC units, especially in big residential or commercial buildings, suck in masses of air, sometimes all day long. In a paper published Tuesday in the journal Nature Communications, Dittmeyer and a team of researchers propose that AC units be employed for a dual purpose: gulping the potent heat-trapping gas carbon dioxide out of the air while also cooling homes and offices.......
Samsung patent reveals wraparound smartphone display concept
Samsung may not have perfected foldable screens quite yet, but the Korean tech giant has some other wild ideas up its sleeve. A new patent awarded to Samsung last week reveals an ambitious phone concept that includes a screen that wraps around the entire device, from front to back. The patent was first spotted by the tech website Let's Go Digital........
Iridescent fish inspires a new color-changing device
The prototype device mimics the neon tetra’s Venetian blind mechanism of changing its colors. A common aquarium fish has given researchers the inspiration for a new type of color-shifting device (ACS Nano 2019, DOI: 10.1021/acsnano.9b00822). The technology might one day provide soldiers with camouflage or form the basis of a new type of display screen, the researchers say.....
Autonomous weed control via smart robots
Soybean fields are becoming increasingly infested with a glyphosate-resistant weed called 'palmer amaranth.' One pesticide currently used for controlling it is 'Dicamba,' but it has devastating effects on adjacent areas, because it tends to drift when sprayed during windy conditions. Researchers report that they have now developed a drift-free, weed-specific applicator, which will pave the way for autonomous weed control with smart robots....
Adhesive formed from bee spit and flower oil could form basis of new glues
Researchers are looking to a bee 'glue' as a model for a bioinspired adhesive because of its unique properties and ability to remain sticky through a range of conditions....
New, more realistic simulator will improve self-driving vehicle safety before road testing
University of Maryland computer scientist Dinesh Manocha, in collaboration with a team of colleagues from Baidu Research and the University of Hong Kong, has developed a photo-realistic simulation system for training and validating self-driving vehicles. The new system provides a richer, more authentic simulation than current systems that use game engines or high-fidelity computer graphics and mathematically rendered traffic patterns....
3-D printer threads electronic fibers onto fabrics
The potential for wearable electronics goes far beyond smart watches, but our current options for battery packs and circuit boards don't make for the most comfortable E-socks. One solution, being developed by scientists in ...
VRKitchen: An interactive virtual environment to train and test AI agents
A team of researchers at the University of California Los Angeles (UCLA), under the supervision of Prof. Song-Chun Zhu, has developed an interactive 3-D virtual environment for training and evaluating AI systems. Their platform, called VRKitchen, was recently presented in a paper pre-published on arXiv....
‘Forever chemicals’ no more? These technologies aim to destroy PFAS in water
Researchers are developing a battery of new treatments to better target and ultimately obliterate fluorinated contaminants in water supplies....
Looking back and forward: A decadelong quest for a transformative transistor
Smartphones contain billions of tiny switches called transistors that allow us to take care of myriad tasks beyond making calls—sending texts, navigating neighborhoods, snapping selfies and Googling names. These switches involve an electrically conducting channel whose conductivity can be changed by a gate terminal, which is separated from the channel by a dielectric film that's a mere 5 to 6 atoms thick....

Read more at: https://phys.org/news/2019-03-decadelong-quest-transistor.html#jCp
Physicists reverse time using quantum computer
Researchers from the Moscow Institute of Physics and Technology teamed up with colleagues from the U.S. and Switzerland and returned the state of a quantum computer a fraction of a second into the past. They also calculated the probability that an electron in empty interstellar space will spontaneously travel back into its recent past. The study is published in Scientific Reports.....

Read more at: https://phys.org/news/2019-03-physicists-reverse-quantum.html#jCp
Defects help nanomaterial soak up more pollutant in less time
Cleaning pollutants from water with a defective filter sounds like a non-starter, but a recent study by chemical engineers at Rice University found that the right-sized defects helped a molecular sieve soak up more perfluorooctanesulfonic acid (PFOS) in less time...

Read more at: https://phys.org/news/2019-03-defects-nanomaterial-pollutant.html#jCp
China is overtaking US in artificial intelligence: researchers
China is poised to overtake the United States in artificial intelligence with a surge in academic research on the key technology, an analysis published Wednesday showed. The analysis by the Allen Institute for Artificial Intelligence showed China has already surpassed the US in published papers on AI—although many of these were considered "medium-quality" or "low-quality." But the researchers said China is likely to top the US in the most-cited 50 percent of papers this year, the most-cited 10 percent of papers next year, and in the top one percent by 2025....

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