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Pro střední Čechy stačil jeden vysílač • První „mobil“ pendloval od zásuvky k zásuvce • Ze začátku si mohli zavolat pouze milionáři

Téměř dva roky po VirtualBoxu 7, který zásadně zlepšil podporu pro Windows 11, Oracle vydává VirtualBox 7.1. Nástroj pro vytváření a spouštění virtuálních počítačů je bezplatně dostupný pro Windows, macOS, Linux a Solaris. Přináší modernější vzhled, novou ikonu a přepracované nastavení rozdělené ...

Mobilní Navi 32 je na světě. Otázkou je, zda může mít její vydání větší než symbolický význam. Odpověď je v podstatě jasná, nemůže. Důvod navíc zdaleka není jediný…

Jak sledovat rozvodněný potok za chalupou • Kde v Česku právě teď hrozí přívalová povodeň • Kolik vody je zrovna v nádrží na Vltavě

Získání validních dat pro učení může být někdy velice pracné (obvykle jsou potřeba nějací odborníci, kteří data správně klasifikuji), a někdy získání takových dat může být úplně nereálně (z finančních nebo organizačních důvodů).

Zatmění Měsíce je jedním z nejkrásnějších vesmírných jevů, který je možné pozorovat pouhým okem. V noci ze 17. na 18. září 2024 se na obloze odehraje částečné zatmění, které bude navíc výjimečné tím, že bude provázeno superúplňkem, kdy je Měsíc nejblíže Zemi. Zatmění začne v ranních hodinách 18. ...

Největšímu distributorovi pro Hongkong došly zásoby procesorů a tak při reklamaci namísto výměny vrací peníze…

Cybersecurity researchers have uncovered a new malware campaign targeting Linux environments to conduct illicit cryptocurrency mining and deliver botnet malware. The activity, which specifically singles out the Oracle Weblogic server, is designed to deliver a malware strain dubbed Hadooken, according to cloud security firm Aqua. "When Hadooken is executed, it drops a Tsunami malware and deploys

Cybersecurity researchers have uncovered a new malware campaign targeting Linux environments to conduct illicit cryptocurrency mining and deliver botnet malware. The activity, which specifically singles out the Oracle Weblogic server, is designed to deliver a malware strain dubbed Hadooken, according to cloud security firm Aqua. "When Hadooken is executed, it drops a Tsunami malware and deploys Ravie Lakshmananhttp://www.blogger.com/profile/[email protected]

Do not go on holiday to the O Smach Resort

The US Department of the Treasury’s Office of Foreign Assets Control issued sanctions on Thursday against Cambodian entrepreneur and senator Ly Yong Phat, for his "role in serious human rights abuse related to the treatment of trafficked workers subjected to forced labor in online scam centers."…

Na všech herních platformách je každou chvíli nějaká slevová akce. Každý týden proto vybíráme ty nejatraktivnější, které by vám neměly uniknout. Pokud chcete získat hry zdarma nebo s výhodnou slevou, podívejte se na aktuální přehled akcí!

With social media age limits, anti-scam laws, privacy tweaks, and misinformation rules Elon Musk labelled 'fascist'

Australia's government has spent the week reining in Big Tech.…

Illegal goods allegedly shipped to the US labeled as toys or jewels

The US Attorney's Office in the District of Massachusetts has seized more than 350 internet domains allegedly used by Chinese outfits to sell US residents kits that convert semiautomatic pistols into fully automatic guns – and silence them as they fire.…

That would explain this 440GB leak, then

Fortinet has admitted that bad actors accessed cloud-hosted data about its customers, but insisted it was a "limited number" of files. The question is: how limited is "limited"?…

Nastyware seeks creds, mines crypto, and plants ransomware that isnt deployed - for now?

An unknown attacker is exploiting weak passwords to break into Oracle WebLogic servers and deploy an emerging Linux malware called Hadooken, according to researchers from cloud security outfit Aqua.…

Bylo vydáno Ubuntu 22.04.5 LTS, tj. páté opravné vydání Ubuntu 22.04 LTS s kódovým názvem Jammy Jellyfish. Stejně tak Kubuntu 22.04.5 LTS, Ubuntu Budgie 22.04.5 LTS, Ubuntu MATE 22.04.5 LTS, Lubuntu 22.04.5 LTS, Ubuntu Kylin 22.04.5 LTS, Ubuntu Studio 22.04.5 LTS a Xubuntu 22.04.5 LTS.

Nuclear fusion has experienced something of a renaissance in recent years with a host of startups and governments seriously pursuing the idea. UK scientists have now provided a sneak peek of a novel reactor design that could be providing power to the grid by 2040.

Despite a reputation for being a technology that’s always 20 years away, recent years have seen a flurry of investment as optimism grows that its time may finally have come. According to the Fusion Industry Association, last year’s $900 million in new funding brought the total to $7.1 billion.

That optimism doesn’t seem to have been dampened by major delays to ITER, the international collaboration that has long been considered fusion’s flagship project. Building on the knowledge gleaned from ITER and other publicly funded experiments, a host of startups is now betting they can deliver smaller fusion reactors at a fraction of the time and cost.

But it’s not only the private sector pushing to commercialize the technology. In 2019, the UK government provided £300 million in funding for the design of a novel 200-megawatt reactor known as Spherical Tokamak for Energy Production (STEP). And in a series of papers recently published in the Philosophical Transactions of the Royal Society A, its designers have now given a glimpse of what they’ve come up with.

The most common design for a fusion reactor is known as a tokamak, which heats a cloud of ionized gas, known as plasma, until the atoms fuse together and generate huge amounts of energy in the process. The plasma is contained by incredibly strong magnetic fields generated by coils of magnets wrapped around a doughnut-shaped reactor vessel.

STEP follows similar principles but is tall and narrow, more like a cored apple, according to Science. While that might not seem like much of a difference, it means the distance between the center of the reactor vessel and the magnets wrapping around it is smaller than a classic tokamak.

This reduction in distance makes it possible to use smaller, less expensive magnets to contain the plasma and makes the entire design more compact, according to the Financial Times. The shape of a spherical tokamak also produces an inherently more stable plasma, which should improve performance. However, the design does have trade-offs.

Fusion reactors normally use two isotopes of hydrogen fuel called deuterium and tritium. Tritium is incredibly rare though, so reactors generate their own tritium by way of a reaction between the metal lithium and neutrons released by the fusion reaction. This lithium is stored in tritium breeding blankets wrapped around the chamber, which also act as radiation shields to protect the magnets.

The hole in the center of a tokamak normally houses large magnets and a breeding blanket. But with the narrower design of the spherical tokamak there is much less space, so the STEP reactor will have to do away with the blanket and significantly shrink the magnets, or even do away with some.

Fortunately, new high-temperature superconducting tape, which is also being used by many private startups, could help create more compact magnets. But the reactor will have to generate enough tritium using only the blankets on the outer wall of the chamber, which means the team had to come up with an optimized design using liquid lithium and a vanadium alloy.

The reactor’s designers have also opted for an ambitious architecture with joints in the magnets, which will make it possible to open the top of the vessel. This will significantly speed up maintenance jobs and therefore lower operational costs.

However, project leader Paul Methven, told Science that the recently published designs are still far from being set in stone. And while the project has already found itself a site—a retired coal-fired power station in Nottinghamshire county—the project is currently in discussions with the UK government to secure four more years of funding to come up with a final blueprint.

So, whether or not this reactor ever sees the light of day remains to be seen. But it is encouraging to see government investing significant sums to push the technology forward.

Image Credit: STEP