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Robot dog can stifle weeds by blasting them with a blowtorch

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Robot dog can stifle weeds by blasting them with a blowtorch

A Spot robot equipped with a blowtorch for tackling weeds

Dezhen Song et al. (2024)

A robot dog equipped with a blowtorch could be used to stop weeds growing on farms, potentially offering a replacement for harmful herbicides.

Even highly targeted herbicides can cause environmental problems, affecting local wildlife, and “superweeds” are quickly evolving resistance to the most common weed-killers like glyphosate.

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In search of an alternative solution, Dezhen Song at Texas A&M University and his colleagues have developed a weed control system that uses a brief burst of heat from a propane-powered torch controlled by a robotic arm, attached to a Spot robot manufactured by Boston Dynamics.

Rather than incinerate the weeds, the robot is designed to identify and heat up the centre of the plant, which can stop it growing for several weeks, says Song. “The weeds don’t die – you just suppress their growth so it gives your crop a chance to fight the weed.”


Song and his team first tested the flame nozzle to make sure they could accurately target the weeds’ centre. Then they deployed the robot in a cotton field planted with weeds native to Texas, like common sunflower (Helianthus annuus) and giant ragweed (Ambrosia trifida). In five trials, they found that the robot could locate and torch the weeds with an average of 95 per cent of the flame focused on the weed.

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One large limitation is the battery life of the Spot robot, which can only run for around 40 minutes in this setup before it needs to be charged, says Song, but the team is working on upgrading to a longer-lasting device. They are also looking at equipping the robot dog with an electrocution device capable of delivering more than 10,000 volts, which will stop weed growth for longer, he says.

“People have been using some forms of fairly broad, imprecise flames to kill weeds on other machines – that’s been around for a while, but I’ve never seen a precision thing like this,” says Simon Pearson at the University of Lincoln, UK. The success of the robot will depend on how accurately it can cast its flame and avoid damaging valuable crops, he says.

Article amended on 24 July 2024

The article was amended to more accurately describe the burning tool and the robot’s battery life.

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Y Combinator’s next Demo Day will include in-person seats for top VCs, Garry Tan says

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Y Combinator’s next Demo Day will include in-person seats for top VCs, Garry Tan says

Y Combinator CEO Garry Tan wants to bring the famed accelerator’s Demo Day presentations back as in-person events by the end of the year.

During Tan’s opening remarks during Wednesday’s YC summer cohort Demo Day, he said this week’s Demo Day presentations will, “knock on wood,” be the final ones held entirely online. Tan added that the accelerator’s first fall cohort Demo Day, which will take place on December 4, will include an in-person element.

Demo Days are like the graduation events for startups that complete its program, where they pitch their products to investors and others in the tech ecosystem. Tan said that in-person seats will be limited and reserved for decision-making investors who have invested at least $50,000 into YC companies within the last two years.

“Think about it this way, you all now have four must-be-at events per year in San Francisco where you can catch up with friends and see the future all at the same time,” Tan said of the planned in-person event to the VCs watching online.

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This switch back to in-person Demo Days is a logical move. While both the accelerator program and its Demo Days went to an online, virtual format in 2020 due to the COVID-19 pandemic, the program itself returned to being an in-person event and has been so for two years now. Meanwhile, YC has been an instrumental part of encouraging more startups to locate themselves in the Bay Area generally, and San Francisco in particular. In addition to its accelerator program, it throws numerous other in-person events for its alumni and the startup community.

Y Combinator recently expanded the number of startup cohorts each year from two to four, adding both a fall and spring batch. The first fall cohort kicks off on September 29. YC’s first spring program will launch in 2025.

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Open Frame Server Rack | MI-7631 (Features)

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Open Frame Server Rack | MI-7631 (Features)



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Why California is suing ExxonMobil for ‘perpetuating the lie’ of plastic recycling

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Why California is suing ExxonMobil for ‘perpetuating the lie’ of plastic recycling

California is going after ExxonMobil over what it calls a “campaign of deception” about plastic recycling.

The Golden State filed suit against the oil giant this week, alleging that it has misled consumers for years by marketing recycling as a way to prevent plastic pollution. Plastic is difficult and relatively costly to recycle, and very little of it ever gets rehashed, but the industry sold recycling as a feasible solution anyway.

That’s why California wants to hold ExxonMobil accountable for the role it says the company played in filling landfills and waterways with plastic. Plastics are made with fossil fuels, and California says ExxonMobil is the biggest producer of single-use plastic polymers.

California wants to hold ExxonMobil accountable

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ExxonMobil defended itself in an emailed response to The Verge, writing: “For decades, California officials have known their recycling system isn’t effective. They failed to act, and now they seek to blame others. Instead of suing us, they could have worked with us to fix the problem and keep plastic out of landfills.”

The Verge spoke with California Attorney General Rob Bonta about plastic recycling and the allegations California makes in the landmark lawsuit.

This interview has been lightly edited for length and clarity.

I think a lot of people around my age grew up thinking that recycling plastic is a good thing. Why go after ExxonMobil over recycling? 

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It’s a difficult confrontation of a truth, especially since ExxonMobil and others have been so successful at perpetuating the lie.

A 14-year-old who I met yesterday was just distraught over the fact that all of the plastic items that she carefully selected to make sure they have the chasing arrows on it and then make sure that after she used it, she placed it thoughtfully and diligently in the blue container for recycling — that 95 percent of the time, that item was not recycled. Instead, it went into the landfill, the environment, or incinerated. And so she was having a hard time, and I’m sure she’s not alone, and others will have the same difficulty getting their head around the actual truth.

It’s really important for us, in my view, to confront problems. You need to face problems to fix them. One of them is a major problem created by ExxonMobil. They have perpetuated the myth of recycling. They have been engaged in a decadelong campaign of deception in which they have tried to convince the public that recycling of plastics, including single-use plastics, is sustainable when it’s not. When they know that only 5 percent is recycled [in the US].

Why would they say that if they knew that it wasn’t true? Well, because it increases their profits. It makes people buy more. If people buy plastics and believe that no matter how much they use, how frequently they use it, if they engage in a single-use throwaway lifestyle, they’re still being good stewards of the environment because it’s all recyclable and will be reused again somewhere in someone else’s household as a plastic product — they’re much more likely to buy more. And that’s exactly what’s happened. 

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Your office says it “uncovered never-before-seen documents” as part of its investigation into the role fossil fuel companies play in causing plastic pollution. Can you give examples of what you found? Did anything surprise you? 

What some of the new documents that have not been seen before really get at is this type of greenwashing by ExxonMobil called advanced recycling.

The documents reveal to us that this newest, latest, purportedly greatest form of recycling is neither advanced nor is it recycling. It’s an old technology. They basically heat the plastic so that it melts into its smallest component parts, and that’s been used before Exxon and Mobil merged. Each experimented with it and then decided to no longer pursue it.

And the process doesn’t actually recycle plastic into other plastic, which is what people think they mean when their plastic is being recycled. But 92 percent of what advanced recycling turns plastic waste into is transportation fuel and other chemicals and resins and materials. It’s mostly fuel for your car, fuel for your boat, fuel for your plane. It’s burned once and emitted into the air, into the environment. That is not recycling.

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What would California get out of winning this case? 

Right now, the harm to California from ExxonMobil’s lies and deception and the myth of recycling are a billion dollars a year in taxpayer-funded cleanup and damage in terms of the plastic pollution crisis that we’re facing. 

Here are the things that we would get if we win this case, and we believe we will. We will get an injunction that says ExxonMobil can no longer lie and can no longer perpetuate the myth of recycling. That they need to tell the truth going forward — they can’t say that things can be recycled when they can’t. 

We’ll also get an abatement fund, which will be funded by billions of dollars from ExxonMobil. It will pay for ongoing plastic pollution in California that harms our people, our environment, our natural resources. It will pay for a re-education campaign so that people can learn that recycling is only 5 percent of plastic waste, 95 percent is not recycled. It could also be used to further research on microplastics, which are invisible plastic particles that are in our bodies, in the air, in our food, in our water, and to see what the human impact is of that. 

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We’ll also get a disgorgement of profits, which means that any profits that were wrongly secured by ExxonMobil because of their lies would have to be turned over. We also have some civil penalties and some fees that we’re seeking.

You’re the first Filipino American attorney general in California, the state with the most FilAms in the US. I used to live in Long Beach, California, where there’s a big Southeast Asian community and also a lot of air pollution from all the vessel and truck traffic surrounding the port in that area. Does this ever get personal for you — the impact that pollution from oil and gas operations disproportionately has on immigrant communities

My oldest daughter, when she was in high school, she came up to me and she said, “Dad is this weird?” She said, “My friends and I have been talking, and we decided that we don’t want to have kids because we don’t want to bring a new life into a dying planet.” And I will always remember that. That was a gut punch. 

That one made me really think. It made me worry. It kept me up at night. It made me question whether we were on pace to fulfill our duty as elected officials, to pass on to the next generation a better society and world than we’ve had. I thought we might be certainly behind schedule and maybe at the risk of failing when it comes to protecting our climate and making sure that there’s a planet for tomorrow. So, that’s personal.

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Our lived experiences, our values, drive us. But we will also always fulfill our duty, our ethical obligations, and make sure that we’re bringing cases that are strong and sound, based on facts and law. It’s consistent with my values, my lived experiences. The law and the facts all point in the same direction on this case.

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“Perfect storm” – CrowdStrike VP apologizes as Congress hearing into outage begins

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"Perfect storm" - CrowdStrike VP apologizes as Congress hearing into outage begins

Following July 2024 Crowdstrike incident, in which millions of Windows machines crashed due to a broken software update for its endpoint protection software, the company’s senior VP for counter adversary operations, Adam Meyers, appeared at a cybersecurity subcommittee hearing at the US House of Representatives to say the company was “deeply sorry”.

Meyers was left to testify in the absence of CEO George Kurtz who, per The Register, declined to testify. Explaining the issue to lawmakers, Meyers said that the company released 10 to 12 content updates, like the one that caused the major incident, per day, and that a “perfect storm of issues”, described in his written testimony (PDF), conspired to put much of the world’s IT’s systems into meltdown, requiring a manual fix.

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Rack Server, Tower Server & Blade Server (ICT Assignment)

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Assassin’s Creed Shadows release date delayed to 2025

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Assassin's Creed Shadows release date delayed to 2025

Ubisoft has announced its highly-anticipated upcoming game Assassin’s Creed Shadows has been delayed until next year.

Instead of releasing it on 12 November as previously planned, it has been pushed back to 14 February 2025.

It follows the disappointing performance of another of the firm’s major titles, Star Wars Outlaws, and concerns from some about how Ubisoft is being run.

The game’s executive producer Marc-Alexis Cote said the developers “need more time to polish and refine the experience”.

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“We understand this decision will come as disappointing news,” he said.

“But we sincerely believe this is in the best interest of the game.”

In a trading update sent to Ubisoft’s investors, seen by the BBC, the firm – which is headquartered in France – said despite the game being “feature complete” it needed more time.

“The learnings from the Star Wars Outlaws release led us to provide additional time to further polish the title,” it reads.

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Star Wars Outlaws was released in August to strong reviews, but early players complained of bugs and glitches.

In its trading update, Ubisoft notes sales of the game were “softer than expected”, which it seemed to be putting down to a lack of polish.

Mr Cote said the firm would refund fans who had pre-ordered the game, and promised a free expansion to anyone who placed a new pre-order for the revised launch.

When it finally arrives, Assassin’s Creed Shadows will be the first game in the series to be set in Japan – a setting fans have been clamouring for since the series began in 2007.

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The decision to push the game back beyond Christmas – usually a lucrative time for game sales – will not have been made lightly.

But the sales performance of Star Wars Outlaws caused Ubisoft’s shares to take a serious hit, when the firm would have been hoping the game would set it back on course.

They have fallen to a price of 11.32 euros a share at the time of writing – the lowest in a decade.

A minority investor wrote a letter to the board earlier this month calling for the company to either be taken private or sold to an investor.

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Ubisoft co-founder and boss Yves Guillemot said the move to push back Assassin’s Creed Shadows’ launch was a result of the firm’s second quarter performance – which “fell sort of our expectations”.

“We remain committed to creating games for fans and players that everyone can enjoy,” he said.

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