Woven City: Toyota plant intelligente Stadt am Fuß des Fujiyama

Viele Techniken lassen sich nur in der Anwendung wirklich gut testen. Der japanische Konzern Toyota baut ein Testfeld für Techniken für Smart City, autonomen Verkehr und Heimautomation: eine eigene Stadt auf einem stillgelegten Fabrikgelände. (Smart C…

Viele Techniken lassen sich nur in der Anwendung wirklich gut testen. Der japanische Konzern Toyota baut ein Testfeld für Techniken für Smart City, autonomen Verkehr und Heimautomation: eine eigene Stadt auf einem stillgelegten Fabrikgelände. (Smart City, Roboter)

How Ars tests Wi-Fi gear (and you can, too)

The tools and methodology we test Wi-Fi with are open source—so you can use them, too.

Behold the glory: four refurbished Chromebooks, each with an additional Linksys WUSB6300 Wi-Fi adapter for out-of-band control and communications.

Enlarge / Behold the glory: four refurbished Chromebooks, each with an additional Linksys WUSB6300 Wi-Fi adapter for out-of-band control and communications. (credit: Jim Salter)

After our review of Google's Nest Wi-Fi kit last fall, we received an unexpected request: Ars reader GerbilMagnus hopped into the comments and asked for an explainer about how we test Wi-Fi.

Machination minutiae hadn't necessarily struck us as something of interest, but ask and you shall receive dear readers. Today, we're taking GerbilMagnus' lead and taking readers behind the scenes of our Wi-Fi testing process—we'll also toss in a little theory and practice along the way. If you want to try our methods at home, know up front that you don't necessarily have to replicate our entire test setup to start seeing useful results for yourself. But if you want to put the latest and greatest mesh gear through the gauntlet, we'll absolutely cover everything from top to bottom before we're done.

Why we run complex tests

Most professional Wi-Fi tests are nothing more than simple Internet speed tests—set up a router or mesh kit, plop a laptop down 10 feet away, and let 'er rip. The idea here is that the highest top speed at close range will also translate into the best performance everywhere else.

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AMD’s third shoe finally drops at CES 2020—7nm Zen 2 mobile CPUs

Intel focused on AI acceleration—but AMD went unapologetically hard on gaming.

AMD has really been bringing the heat to Intel this year, with incontestable wins for its 7nm CPUs in the desktop space, high-end desktop space, and server space. The one thing everybody has been waiting with bated breath for is mobile—while Intel brought limited supplies of high-performance 10nm Ice Lake parts to market, AMD has remained pretty silent about mobile. The most I could ever get out of my AMD folks was a sort of "we can't talk about that yet," with suspicious little yellow feathers floating out of their mouths, but no real detail.

Yesterday at CES, that final shoe dropped—Ryzen 4000 mobile is here, and it brings AMD's recent trademark of high core and thread counts and jaw-dropping low TDPs to the mobile arena. The flagship U-series part, Ryzen 4800u, offers eight cores/16 threads on only 15W TDP, and although we've got nobody's word for it yet but AMD Performance Labs', it appears to whip the high-end Ice Lake i7-1065G7 solidly across the board in tests ranging from Cinebench R20 to 3DMark, Adobe Premiere, and more.

Of course, performance is only half the battle in ultralight form factors—power consumption is the other. It shouldn't be any surprise that AMD is showing massive performance-per-watt increases over the first two generations of mobile Ryzen, given those performance numbers with a 15W TDP. The bigger question—and one that can't be so quickly answered—is how well Ryzen 4000 series systems will idle. And unfortunately, that's not a question AMD can entirely control themselves.

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Hashfunktion: SHA-1 ist endgültig kaputt

Ein Hashwert soll eindeutig sein, doch für SHA-1 gilt das nicht mehr. Forscher zeigten nun, dass sie verschiedene Dateien auffüllen können, um den gleichen SHA-1-Hash zu erzeugen und illustrierten dies anhand von GnuPG-Signaturen. (SHA-1, Verschlüsselu…

Ein Hashwert soll eindeutig sein, doch für SHA-1 gilt das nicht mehr. Forscher zeigten nun, dass sie verschiedene Dateien auffüllen können, um den gleichen SHA-1-Hash zu erzeugen und illustrierten dies anhand von GnuPG-Signaturen. (SHA-1, Verschlüsselung)

Kaufberatung: Die richtige CPU und Grafikkarte

Grafikkarten und Prozessoren wurden 2019 deutlich besser, denn AMD ist komplett auf 7-nm-Technik umgestiegen. Intel hat zwar 10-nm-Chips marktreif, die Leistung stagniert aber und auch Nvidia verkauft nur 12-nm-Designs. Wir beraten bei Komponenten und …

Grafikkarten und Prozessoren wurden 2019 deutlich besser, denn AMD ist komplett auf 7-nm-Technik umgestiegen. Intel hat zwar 10-nm-Chips marktreif, die Leistung stagniert aber und auch Nvidia verkauft nur 12-nm-Designs. Wir beraten bei Komponenten und geben einen Ausblick. Von Marc Sauter (PC-Hardware, Prozessor)

Facebook Sees Copyright Abuse as One of the Platform’s Main Challenges

Facebook says that it takes abuse and misuse of copyright takedowns very seriously. The company sees this type of abuse as one of its main challenges and it spends a lot of time making sure that legitimate content isn’t blocked. The social media giant made these statements in a recent “Article 17” stakeholder meeting at the EU Commission.

Source: TF, for the latest info on copyright, file-sharing, torrent sites and more. We also have VPN reviews, discounts, offers and coupons.

When it comes to targeting infringement, Facebook has rolled out a few anti-piracy initiatives over recent years.

In addition to processing regular takedown requests, the company has a “Rights Manager” tool that detects infringing material automatically and allows owners to take down or monetize the content.

In a recent meeting organized by the European Commission, Facebook explained in detail how this automated system works. The meeting was organized to create a dialogue between various parties about possible solutions for the implementation of Article 17.

In Facebook’s presentation Dave Axelgard, product Manager for Rights Manager, explained how automated matching of copyrighted content takes place on the social media network. He also detailed what actions rightsholders can take in response, and how users can protest misuse and abuse of the system.

The EU meeting was attended by a wide range of parties. In addition to copyright holders, it also included various people representing digital rights organizations. Facebook made it clear that it keeps the interests of all sides in mind. It specifically highlighted, however, that abuse of Rights Manager is a serious concern.

“We spend much of our time building systems to avoid blocking legitimate content,” Axelgard mentioned during his presentation.

“The way that inappropriate blocks occur is when rightsholders gain access to Rights Manager despite our application process, who attempt to upload content to the tool that they do not own.”

Another form of overblocking that takes place is when copyright holders upload content that they don’t own. This can happen by mistake when a compilation video is added, which also includes content that’s not theirs.

Facebook works hard to catch and prevent these types of misuse and abuse, to ensure that its automated detection system doesn’t remove legitimate content. This is also something to keep in mind for the implementation of possible ‘upload filters’ with the introduction of Article 17.

“Misuse is a significant issue and after operating Rights Manager for a number of years, we can tell you it is one of the most sensitive things that need to be accounted for in a proportionate system,” Axelgard says.

Facebook tries to limit abuse through a variety of measures. The company limits access to its Rights Manager tool to a select group of verified copyright holders. In addition, it always requires playable reference files, so all claims can be properly vetted.

The social media network also limits the availability of certain automated actions, such as removal or blocking, to a subset of Rights Manager users. This is in part because some smaller rightsholders may not fully understand copyright, which can lead to errors.

Finally, Facebook points out that misuse of its Rights Manager tool constitutes a breach of its Terms of Service. This allows the company to terminate rightsholders that repeatedly make mistakes.

“If we find that Rights Manager is being misused, then under our Rights Manager terms we have the ability to terminate someone’s access to the tool. We really do want to stress how important it is that platforms have the ability to adjust access and functionality related to these powerful technologies to avoid misuse,” Axelgard notes.

The strong focus on misuse was welcomed by digital rights groups, including Communia. However, it also raised some eyebrows among rightsholders.

Mathieu Moreuil of the English Premier League, who represented the Sports Rights Owner Coalition, asked Facebook whether the abuse of Rights Manager really is the company’s main challenge.

“I think it’s definitely one of our main challenges,” Axelgard confirmed, while noting that Facebook also keeps the interests of rightsholders in mind.

Overall, Facebook carefully explained the pros and cons of its system. Whether it is an ideal tool to implement Article 17 in EU countries is another question. In its current form Rights Manager isn’t, as it doesn’t allow all copyright holders to join in.

Also, Rights Manager works with audio and video, but not with digital images, which is another major restriction.

On the other hand, there are pitfalls from a consumer perspective as well. Automated systems may be very good at detecting copyrighted content, but Facebook confirmed that they currently can’t make a determination in respect of copyright exemptions such as parody and fair use.

“Our matching system is not able to take context into account. It’s just seeking to identify whether or not two pieces of content matched to one another,” Axelgard said, responding to a question from Communia’s Paul Keller.

This shortcoming of automated filters was also confirmed by Audible Magic, the popular music matching service that’s used by dozens of large companies to detect copyright infringements.

“Copyright exceptions require a high degree of intellectual judgment and an understanding and appreciation of context. We do not represent that any technology can solve this problem in an automated fashion. Ultimately these types of determinations must be handled by human judgment,” Audible Magic CEO Vance Ikezoye said.

As noted by Communia, the most recent stakeholder meeting once again showed that automated content recognition systems are extremely powerful and very limited at the same time.

If any of these technologies become the basis of implementing Europe’s Article 17 requirements, these shortcomings should be kept in mind. Or as Facebook said, a lot of time and effort should go into preventing legitimate content being blocked.

A video of the full stakeholder meeting is available on the European Commission’s website. A copy of Facebook’s slides is available here (pdf).

Source: TF, for the latest info on copyright, file-sharing, torrent sites and more. We also have VPN reviews, discounts, offers and coupons.

Artega Karo: Die elektrische Isetta kommt im April

Angekündigt war die elektrische Version des Kultautos Isetta für 2019. Ein Rechtsstreit zwischen den beiden Projektpartnern verzögerte die Entwicklung des Elektroautos jedoch. Inzwischen sind die Hindernisse für die E-Knutschkugel ausgeräumt. (Elektroa…

Angekündigt war die elektrische Version des Kultautos Isetta für 2019. Ein Rechtsstreit zwischen den beiden Projektpartnern verzögerte die Entwicklung des Elektroautos jedoch. Inzwischen sind die Hindernisse für die E-Knutschkugel ausgeräumt. (Elektroauto, Technologie)

Foto-Morphing: Regierung verteidigt Passbildterminals in Ämtern

Fotohändler wehren sich gegen die Pflicht zu biometrischen Passbildaufnahmen in den Behörden. Doch die Bundesregierung hält ihre Pläne für bürgerfreundlich und kostengünstiger. (Biometrie, Datenschutz)

Fotohändler wehren sich gegen die Pflicht zu biometrischen Passbildaufnahmen in den Behörden. Doch die Bundesregierung hält ihre Pläne für bürgerfreundlich und kostengünstiger. (Biometrie, Datenschutz)

Icann: Gemeinnützige Kooperative will .org selbst kaufen

Statt die Top-Level-Domain .org einem Finanzinvestor zu überlassen, will eine Kooperative .org nun selbst kaufen. Mit dabei sind die Wikipedia-Chefin, Icann-Gründer und der technische Betreiber von .org. (Internet, DNS)

Statt die Top-Level-Domain .org einem Finanzinvestor zu überlassen, will eine Kooperative .org nun selbst kaufen. Mit dabei sind die Wikipedia-Chefin, Icann-Gründer und der technische Betreiber von .org. (Internet, DNS)