Tehnologia roșie oferă o purificare mai bună și mai ieftină a apei
Marţi, 04 Iunie 2019 10:50
A bouquet of the rose-inspired (or actually tulip-inspired) solar steamers(Credit: Cockrell School of Engineering, The University of Texas at Austin)
"Solar steaming" is an eco-friendly form of water purification in which sunlight is used to heat tainted water, turning it to steam which condenses back into liquid. That clean liquid is then collected as drinking water. A new system offers improved performance, and it copies the structure of the rose flower.
Led by Assoc. Prof. Donglei (Emma) Fan, a team from The University of Texas at Austin started with round pieces of paper that were coated with a black polymer known as polypyrrole – it's particularly good at converting solar light into heat. Those papers were initially just placed flat on the ground in the sunlight, where they showed promise for solar steaming, although they weren't efficient enough for practical use.
Inspired by a book she had read called The Black Tulip, Fan proceeded to try placing multiple papers together in a rose petal-like arrangement, contained within a glass jar. Tainted water was then drawn up into them through a stem-like tube that extended down into a vessel below.
Gallery: Jeep campers, floaty amphibians and other world-exploration rigs of Overland Expo 2019
Luni, 03 Iunie 2019 17:04
Those giant 63-in Sherp tires propel the beast through water, as well as over land(Credit: 4theriders.com / New Atlas)
Overland Expo celebrated its 10th anniversary this year, and the 2019 show proved more than ever that "overlanding" has exploded from barely-recognized travel alternative to aspirational lifestyle. The largest Overland Expo ever welcomed more than 22,000 attendees and 1,500 registered vehicles (and plenty of cool non-registered vehicles, too). We've seen the camper vans of the show, and here we take a tour of everything from neatly packaged utility vehicle campers, to big expedition trucks, to that amphibious Russian rover staring at you just above.
Lacatus ... Comandantul clubului CSA Steaua ( domnul colonel Bixi ) care a alocat un Buget foarte,foarte Important sectiei de fotbal a clubului CSA Steaua isi va da DEMISIA ......................... ????
Loctiitorii comandantului de la CSA Steaua ............................
Cine raspunde din cadrul Ministerului Apararii Nationale de CSA Steaua ce va face ? * Carmen a batut cu 1:0 Csa Steaua in meciul decisiv ptr. locul I in Liga a IV a Felicitari Carmen Bucuresti !!! * Nici anul trecut echipa de fotbal a clubului CSA Steaua nu a ocupat locul I in Liga a IV a, desi si anul trecut au avut un Buget foarte , foarte important........ Va mai pastra sectia de fotbal CSA Steaua , sau o vor Desfiinta ???
Astronomers discover oddball planet that shouldn't be where it is
Sâmbătă, 01 Iunie 2019 13:41
An exoplanet smaller than Neptune with its own atmosphere has been discovered in a Neptunian Desert(Credit: University of Warwick/Mark Garlick)
An international team of astronomers led by the University of Warwick has found a "forbidden" planet orbiting the "Neptunian Desert" of another star. Located 920 light years from Earth, exoplanet NGTS-4b is 20 percent smaller than Neptune, yet it retains an atmosphere despite being close enough to circle its star once every 1.3 days and having a surface temperature of 1,000° C (1,800° F).
The hunt for exoplanets keeps throwing out surprises and the latest is a planet that simply shouldn't be where it is. The accepted wisdom is that planets the size of Neptune or smaller can have atmospheres when they are far away from their host stars, but are airless, rocky planets if they are close in because, unlike those the size of Jupiter and bigger, they haven't enough gravity or powerful magnetic fields to counteract the heat and solar winds from a star at close range.
Discovered by the Next-Generation Transit Survey (NGTS) telescope array at the European Southern Observatory's Paranal Observatory in Chile's infamous Atacama Desert, NGTS-4b is a "forbidden" planet in that it is a Neptune-sized planet with a mass 20 times that of the Earth, it is close in to its star, but it still has an atmosphere.
AVSForum - Reperele CES 2019 Evaluat - Alegerea editorilor CES
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Austria are un nou cancelar, după demisia Guvernului Sebastian Kurz
Joi, 30 Mai 2019 18:11
Conform mediafax.ro ,Preşedintele Austriei, Alexander Van der Bellen, a desemnat-o, joi după-amiază, pe fosta judecătoare Brigitte Bierlein în funcţia de cancelar, în contextul crizei politice de la Viena care a condus la demisia Guvernul Sebastian Kurz.
Brigitte Bierlein a fost desemnată cancelar al Austriei
"O cunosc şi o apreciez pe doamna Bierlein, o persoană prudentă, deschisă şi foarte competentă. Îi încredinţez doamnei Bierlein sarcina de a forma guvernul federal", a declarat Van der Bellen, citat de agenţia de presă APA.
În vârstă de 69 de ani, Brigitte Bierlein este de profesie judecător, iar în ultimul an a fost preşedintele Curţii Constituţionale din Austria.
Cancelarul Brigitte Bierlein ar urma să formeze un guvern de tranziţie, până la organizarea scrutinului parlamentar.
