A solar-powered rocket might be our ticket to interstellar space

Researchers tapped by NASA just conducted a first test of a decades-old concept.

A solar-powered rocket might be our ticket to interstellar space

Enlarge (credit: Haitong Yu | Getty Images)

If Jason Benkoski is right, the path to interstellar space begins in a shipping container tucked behind a laboratory high bay in Maryland. The set up looks like something out of a low-budget sci-fi film: One wall of the container is lined with thousands of LEDs, an inscrutable metal trellis runs down the center, and a thick black curtain partially obscures the apparatus. This is the Johns Hopkins University Applied Physics Laboratory solar simulator, a tool that can shine with the intensity of 20 suns. On Thursday afternoon, Benkoski mounted a small black and white tile onto the trellis and pulled a dark curtain around the set-up before stepping out of the shipping container. Then he hit the light switch.

Once the solar simulator was blistering hot, Benkoski started pumping liquid helium through a small embedded tube that snaked across the slab. The helium absorbed heat from the LEDs as it wound through the channel and expanded until it was finally released through a small nozzle. It might not sound like much, but Benkoski and his team just demonstrated solar thermal propulsion, a previously theoretical type of rocket engine that is powered by the sun’s heat. They think it could be the key to interstellar exploration.

Read 14 remaining paragraphs | Comments

Covid-19 und die wundersame Reproduktionszahl des RKI

Warum das Robert-Koch-Institut bei der Berechnung der Infektionsentwicklung danebenliegt. Und wie es an sozialmedizinischen Herausforderungen scheitert

Warum das Robert-Koch-Institut bei der Berechnung der Infektionsentwicklung danebenliegt. Und wie es an sozialmedizinischen Herausforderungen scheitert

One hell of a send-off: Pandemic Legacy: Season 0 wraps a stylish board game series

A big new “legacy” board game arrives with Cold War vibes.

One hell of a send-off: Pandemic Legacy: Season 0 wraps a stylish board game series

Enlarge

Welcome to Ars Cardboard, our weekend look at tabletop games! Check out our complete board gaming coverage at cardboard.arstechnica.com.

When Pandemic Legacy: Season 1 was released in 2015, it was met with a rave reaction from players. A campaign-based take on the original Pandemic, it dropped fans into the familiar role of medics battling to eradicate deadly viral strains before they spread around the globe and destroy humanity.

The game’s biggest draw was a storyline which unfolded over multiple play sessions, with diseases mutating and cities falling into chaos as a sinister conspiracy spread its tendrils across the world. Along the way, players put stickers on the board, destroyed cards, and opened sealed compartments to reveal hidden components, permanently changing the game in response to their own actions. A sequel, Pandemic Legacy: Season 2, took the action decades into the future, exploring a world wracked by the events of the first game. Now, there’s a third and final installment, taking players back to the dangerous days of 1962 and the height of simmering tensions between the United States and the Soviet Union.

Read 12 remaining paragraphs | Comments

New MPA Subpoena Targets Private BitTorrent Tracker & Locally Significant Pirate Sites

The MPA and Alliance for Creativity and Entertainment regularly obtain DMCA subpoenas against Cloudflare, often targeting the most significant pirate sites globally. Interestingly, a new subpoena obtained this week appears to target sites that are important to specific regions, notably around Europe. It also includes, to our knowledge, the first attempt to learn more about a private BitTorrent tracker.

From: TF, for the latest news on copyright battles, piracy and more.

ACE logoIn what appears to be an increasing trend, global anti-piracy coalition Alliance For Creativity and Entertainment regularly heads off to court in the United States to obtain information about pirate site operators.

The weapon of choice is the DMCA subpoena, a number of which are targeted at domain registrars and US-based Cloudflare, the CDN company utilized by thousands of pirate sites. In many cases, these subpoenas seek to obtain intelligence on the world’s largest streaming and torrent portals for use in enforcement and policy activities.

A new subpoena obtained this week, however, suggests that ACE has an interest in learning about who is operating sites that are popular on a local level.

Sites That Appear to Evade Blocking in the UK

Since 2011, the UK High Court has handed down a number of blocking injunctions targeting pirate sites. Official data is a tightly held secret but it’s believed that thousands of URLs are blocked by the country’s ISPs, mostly targeting giants such as The Pirate Bay, RARBG, and similar well-known platforms.

Despite maintaining that blocking leads to “meaningful increases in legal online consumption”, the MPA hasn’t made any blocking requests for years, leading to other sites increasing their traffic. These include MagnetDL, for example, whose traffic relies heavily on the UK market.

Perhaps aiming to put a dent in this success, the MPA/ACE subpoena obtained this week aims to find out more about MagnetDL’s operator after informing the court that the site helps to distribute the movie Frozen II in breach of Disney’s copyrights. And there are others too.

Knaben.net has only been gaining any significant traffic since the summer but the torrent search engine, which also helps people access blocked sites, is now doing rather well with an estimated two million visitors per month. Interestingly and according to SimilarWeb stats, around a third of that traffic is coming from the UK where the site is not blocked, with just over 5% coming from the US, the next most popular visitor location.

A similar situation can be found in 0123movies.com which has been running for some time, pulling in up to five million visits per month since the summer, with around 30% of those coming from the UK. Only the US comes close in terms of traffic but even that huge nation is relegated to second place.

Continuing on the 123movies theme, 123movies.net has even more traffic but it too is highly reliant on the UK market, with around a quarter of its visitors hailing from the region. 123moviesfree.com is a much smaller operation but again, around 30% of its traffic comes from the UK. The outlier is 0123movie.net, which derives almost 60% of its traffic from the US with the UK trailing behind, albeit with an estimated million visitors per month.

Sites Thriving Around Europe

With millions of visitors per month each, it’s no surprise that sites such as Goldesel.to, HD-Streams.org, and TopStreamFilm.com feature in the DMCA subpoena obtained by ACE/MPA. In these cases, the sites are all heavily reliant upon traffic from Germany with 66%, 65% and 52% traffic share currently hitting the sites.

That being said, there are other sites even more reliant on traffic from specific European countries. Movie and TV show streaming site Cpasmal.info, for example, has almost 92% of its 2 to 4 million monthly visitors arriving from France.

Vidcorn.tv, on the other hand, has around six million monthly visitors, with more than 80% hailing from Spain. And when it comes to reliance on the Italian market, Eurostreamingtv.com is right up there with 97%, with Switzerland, Germany. Belgium and the UK fighting over the remaining 3%.

Finally, an Interesting Outlier

The vast majority of ACE/MPA subpoenas target streaming and public torrent sites but this one contains a notable exception.

Buried away in the list is Ethor.net, an invite-only private tracker specializing in French-language content. According to estimates from 2019, the site ‘only’ has around 20,000 members but with around 100,000 torrents, the site appears to be generating more than a million visits per month, three-quarters of which can be allocated to Canadian users.

As far as we’re aware, this is the first time that a private BitTorrent tracker has made an appearance in a Cloudflare subpoena but at the rate they’re currently being obtained from courts in the US, this probably won’t be the last.

The DMCA subpoena documents can be found here (1,2 pdf), full site list below

0123movie.net
0123movies.com
123movies.net
123moviesfree.com
123movies-free.sc
azm.to
cpasmal.info
ethor.net
eurostreaming.name
eurostreamingtv.com
filmpalast.to
goldesel.to
hdfilme.cx
hdfull.io
hd-streams.org
knaben.net
magnetdl.com
mejortorrentt.net
movidy.co
pctmix.com
pelismart.com
tekilaz.co
rarbgmirror.com
repelishd.tv
seriesflix.to
tirexo.pro
topstreamfilm.com
torrentdownloads.me
vidcorn.tv
videospider.stream
vumoo.to
yesmovies.so
zone-annuaire.top

From: TF, for the latest news on copyright battles, piracy and more.

When AI sees a man, it thinks “official.” A woman? “Smile”

Concerns about bias in image recognition services from Google, Microsoft, and Amazon.

When AI sees a man, it thinks “official.” A woman? “Smile”

Enlarge (credit: Sam Whitney (illustration), Getty Images)

Men often judge women by their appearance. Turns out, computers do too.

When US and European researchers fed pictures of members of Congress to Google’s cloud image recognition service, the service applied three times as many annotations related to physical appearance to photos of women as it did to men. The top labels applied to men were “official” and “businessperson”; for women they were “smile” and “chin.”

Read 17 remaining paragraphs | Comments

Paradoxerweise können Gesellschaften ab einer gewissen Konnektivität zerfallen

Wissenschaftler glauben mit einem Gesellschaftsmodell belegen zu können, dass mit steigender Konnektivität ab einem Kipppunkt die Fragmentierung in feindliche Blasen zunimmt

Wissenschaftler glauben mit einem Gesellschaftsmodell belegen zu können, dass mit steigender Konnektivität ab einem Kipppunkt die Fragmentierung in feindliche Blasen zunimmt