Tag Archives: disrupts

The Doorway Effect: How Entering a New Room Disrupts Your Train of Thought

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Don’t worry; you’re not alone in experiencing this unsettling phenomenon.

Since 2006, psychologists at the University of Notre Dame in Indiana have been researching a cognitive phenomenon known as the doorway effect. In a significant study, they utilized virtual reality technology to illustrate how volunteers who walked through a doorway into a different room exhibited a notable decline in their memory of the items within the room.

The researchers provide a three-part explanation for this intriguing effect. Our memories are categorized into episodes, and reminiscing about information from previous episodes can be challenging. Crucially, passing through a doorway generates a new episode or “event boundary,” complicating the recall of information from the prior memory episode.

These findings imply that doorways possess a fascinating effect on our cognitive processes. However, a team from the University of Queensland offered a more nuanced perspective. They found that moving through doorways leading to the same room had minimal impact on memory retention. This may be due to insufficient contextual changes to establish event boundaries. Interestingly, the doorway effect only influenced memory when participants were distracted by a secondary task during the transition.

The Queensland team’s observations align with daily experiences, where distractions often lead to forgetfulness about our initial intentions upon entering a new space. This suggests that the doorway effect is most pronounced when transitioning between significantly different contexts, such as moving from the living room to the garden.

These new insights also indicate potential strategies for mitigating forgetfulness. When you enter a room with a specific task in mind, try to concentrate on your goal. If that proves difficult, jotting down a note on your hand can be a helpful reminder.

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Source: www.sciencefocus.com

Amazon Rainforest Faces Drought as Deforestation Disrupts Atmospheric Rivers

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Deforestation in the Amazon

Vast areas of the Amazon rainforest are cleared for cattle ranching

Michael Dantas/AFP via Getty Images

The alarming rate of deforestation is significantly diminishing rainfall patterns across the Amazon, indicating that this vital rainforest could hit a catastrophic tipping point sooner than previously anticipated.

Research from 1980 to 2019 indicates that rainfall in the southern Amazon basin has diminished by 8 to 11 percent, based on satellite data and rain gauge readings. During this same time frame, tree cover in the region has shrunk by 16 percent, primarily due to deforestation linked to beef cattle ranching.

Contrastingly, deforestation has been less pronounced in the northern Amazon Basin, where precipitation has only shown minor increases that lack statistical significance.

Recent research highlights that deforestation contributes to arid conditions within a 300-kilometer radius. This new analysis reveals that this effect spans over a basin wider than 3,000 kilometers, suggesting that deforestation harms not just forests, but also the productivity of adjacent ranches and soybean farms, according to Dominique Spracklen from the University of Leeds.

“Some in agribusiness may perceive sections of the forest as underutilized land. Yet, these forests play a crucial role in maintaining regional rainfall, which in turn benefits our agricultural practices,” Spracklen explains.

Global warming is exacerbating the drying of the Amazon, culminating in extreme droughts and unprecedented wildfires in 2024. However, atmospheric studies led by Spracklen and colleagues indicate that deforestation is responsible for 52 to 75 percent of the decline in rainfall.

Moisture from the Atlantic Ocean is transported by prevailing winds into the Amazon, where it precipitates as rain. Plants contribute to this cycle as evaporation and transpiration return about three-quarters of that water to the atmosphere. Further downwind, it falls again as rain through multiple cycles, creating “flying rivers” that distribute moisture across the rainforest.

When forested areas are destroyed, over half of the rainwater is redirected to rivers and subsequently returns to the ocean, depleting the moisture available for the flying rivers and leading to reduced rainfall. Additionally, this diminishes atmospheric instability necessary for storm cloud formation, Spracklen and his team discovered.

As fewer trees slow down the wind, it tends to pick up speed, removing more moisture from the area.

Unlike previous research, this study employs a combination of data and modeling to effectively illustrate how deforestation impacts rainfall patterns, asserts Yadvinder Malhi from Oxford University.

“The atmosphere becomes smoother and, in a sense, slipperier. There’s reduced friction with the ground, enabling moisture to travel further out of forested regions,” Malhi notes, emphasizing the significance of secondary atmospheric processes often overlooked in prior studies.

Scientists voice concerns that the cumulative impact of heightened temperatures, drought, and deforestation could push the Amazon rainforest to a tipping point where it transitions into a savannah ecosystem, although the timeline for this transition remains uncertain. Spracklen and his colleagues found that climate models may underestimate the influence of deforestation on rainfall by as much as 50 percent, implying that the rainforest could face significant threats earlier than anticipated.

According to a 2022 study, there is a 37% probability that certain regions of the Amazon could vanish by 2100 if global temperatures, currently at 1.4°C, rise to 1.5°C. However, this does not necessarily imply that rainforests will convert into savannahs; it may lead to the emergence of fewer species and scrub forests capable of storing less carbon.

“The Amazon’s sensitivity is greater than we previously imagined, which is troubling,” he states. “We may be closer to the deforestation threshold than we realize, although there remains significant uncertainty surrounding this issue.”

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Source: www.newscientist.com

Cloudflare Outage Disrupts Websites Including LinkedIn and Zoom

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A variety of websites, such as LinkedIn, Zoom, and Downdetector, experienced outages on Friday morning due to another incident involving Cloudflare. This marks the company’s second disruption within a month.

Cloudflare reported that the outage was triggered by adjustments made to their firewalls intended to protect customers from a widespread software vulnerability disclosed earlier this week, clarifying it was not the result of a cyber attack. Previously, another issue was observed concerning their application programming interface.

The incident lasted approximately 30 minutes, concluding shortly after 9 a.m. Japan time. This follows a larger Cloudflare outage in mid-November that impacted platforms like X, OpenAI, and Spotify, along with online games such as League of Legends.

The underlying issue was identified as “configuration files that are automatically generated to manage threat traffic,” which exceeded expected sizes, leading to a crash of the software system responsible for handling traffic across various Cloudflare services.

Friday’s malfunction appeared relatively minor, affecting sites including Canva, Shopify, and the India-based brokerage firm Groww, alongside LinkedIn, Zoom, and Downdetector, which tracks online service issues. Downdetector recorded over 4,500 reports related to Cloudflare once the services resumed.

Given the recent series of prominent internet outages, some businesses might be reevaluating their reliance on Cloudflare’s offerings.

Stephen Murdoch, a computer science professor at University College London, noted, “Given these two outages within such a brief timeframe, it’s likely people will begin to question their reliability. They’re not satisfied, and Cloudflare isn’t happy either. They apologize, but it’s premature to determine if there’s a systemic problem, like software misuse, or just unfortunate timing.”

Murdoch emphasized that Cloudflare, known for its global cloud services and cybersecurity, promotes itself on its reliability. Businesses utilize its services for enhanced immunity against specific cyber threats, improved website performance, faster load times, and greater resilience to server failures.

The recent outages from Amazon Web Services, including one in October that affected over 2,000 businesses globally, have sparked discussions among experts about whether major internet services are becoming overly centralized and thus more vulnerable.

“There’s significant centralization occurring,” Murdoch stated. “Cloudflare offers an excellent product and is widely used, which introduces potential vulnerabilities.”

“This highlights yet again how exposed the major tech internet is,” remarked Michał “Risiek” Wojniak, an expert on DNS and internet infrastructure. “This marks the fourth major global outage since October 20th that has drawn the attention of media outside of the tech sphere and affected everyday users around the globe.”

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According to Cloudflare, around 20% of all websites utilize its services in one form or another. The company boasts nearly 300,000 clients in 125 countries and claims to thwart billions of cyberattacks against its users on a daily basis, generating over $500 million (£440 million) each quarter.

Wojniak stated that the recent outages raise questions about Cloudflare’s marketing strategy, which promotes reliability and resilience alongside the common belief that larger enterprises are safer partners than smaller infrastructure providers.

“These companies are growing too large to fail, and their extensive traffic handling means that when they do encounter issues, it leads to significant problems very quickly,” he added.

Conversely, Murdoch suggested that the outages could be an opportunity for Cloudflare. “When AWS went down, its stock price actually increased because people recognized the scale of its usage. [The outage] serves as effective marketing, demonstrating the widespread reliance on Cloudflare.”

Source: www.theguardian.com

Amazon Web Services Outage Disrupts Global Platforms, Shows “Signs of Recovery”

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A significant internet disruption has impacted numerous websites and applications globally, with users experiencing difficulties connecting to the internet due to issues with Amazon’s cloud computing service.

The affected services include Snapchat, Roblox, Signal, and Duolingo, along with various Amazon-owned enterprises, including major retail platforms and the Ring doorbell company.

In the UK, Lloyds Bank and its associated brands, Halifax Bank and Bank of Scotland, were impacted, with HM Revenue & Customs also facing challenges accessing their website on Monday morning. Additionally, Ring users in the UK reported non-functioning doorbells on social media.

In the UK alone, there were tens of thousands of reports concerning issues with individual applications across various platforms. Other affected services include Wordle, Coinbase, Slack, Pokémon Go, Epic Games, PlayStation Network, and Peloton.

By 10:30am UK time, Amazon indicated that the issues, which began around 8am, were being addressed, as AWS showed “significant signs of recovery.” At 11 a.m., they confirmed that global services linked to US-EAST-1 had also been restored.

Amazon reported that the problems originated from Amazon Web Services on the East Coast of the U.S. AWS, which is a division providing essential web infrastructure and renting out server space, is the largest cloud computing platform worldwide.

Shortly after midnight (8am BST) in the U.S., Amazon acknowledged “increased error rates and latencies” for its AWS services in the East Coast region. This issue seems to have caused a worldwide ripple effect, as the Downdetector site logged problems from multiple continents.

Cisco’s Thousand Eyes service track internet outages reported a surge in problems on Monday morning, particularly in Virginia, where Amazon’s US-East-1 region is based, noting that AWS confirmed the start of the issues.

Leif Pilling, director of threat intelligence at cybersecurity firm Sophos, stated that the outage seems to be an IT-related issue rather than a cyberattack. The AWS Online Health Dashboard identified problems with DynamoDB, a database system facilitating data access for websites.

“During events like this, it’s natural for concerns of a cyber incident to arise,” he noted. “Given AWS’s extensive and complex footprint, any issue can trigger considerable disruption. It appears that this incident originates from an IT problem on the database side, which AWS prioritizes resolving promptly.”

Dr. Colin Cass Speth, head of digital at human rights organization Article 19, pointed out that the outage underscores the risks of concentrating digital infrastructure in the hands of a few providers.

“There is an urgent need to diversify cloud computing. The infrastructure supporting democratic discourse, independent journalism, and secure communication should not rely solely on a handful of companies,” she stated.

The British government reported that it was in touch with Amazon concerning the internet disruption on Monday.

A spokesperson remarked: “We are aware of an incident affecting Amazon Web Services and several online services dependent on its infrastructure. Through our established incident response structure, we are in communication and working to restore services as quickly as possible.”

Source: www.theguardian.com

A black hole’s colossal outburst disrupts the entire galaxy’s equilibrium.

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We all have bad days, with a monumental striptease here or an expression of anger there, but have you ever thrown a tantrum so bad that it upsets the balance of the entire galaxy?

Well, thanks to you, it turned out like this One particularly badly behaved black hole Observed by XMM-Newton Space Observatory.

If you zoom in on any large galaxy, you’ll find a supermassive black hole that pulls in gas from its surroundings with its immense gravity. As the gas spirals inward, it is squeezed into what is known as an accretion disk, a flat disk of gas orbiting around a massive central object.

Over time, the gas closest to the black hole passes through the point of no return and is essentially chewed up by its immense gravity. However, there’s a twist here. The black hole consumes only a portion of this gas and spits the rest back into space.

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Sometimes, like the naughty black hole discovered by XMM Newton, a black hole doesn’t just spew out a small amount of gas, it spews out its entire meal over hundreds of days. The gas in the accretion disk is thrown off in all directions at such high velocities that it completely wipes out the surrounding interstellar gas.

The effect would be so severe that gas would be blown through space and new stars would no longer be able to form. This completely changes the landscape of the surrounding galaxy where the black hole is found.

Accretion disk surrounding black hole slowly pulls in gas – Credit: European Space Agency

Typically, only black holes with very bright accretion disks spew out gas. These brighter disks typically feature faster “black hole winds” that spew out gas.

“It is extremely rare to observe ultrafast winds, and even rarer to detect winds with enough energy to change the properties of the host galaxy,” the co-authors said. Elias CammonAstronomer at Roma Tre University in Italy.

“The fact that Markarian 817 is [the galaxy in question] These winds occurred for about a year but were not particularly active, suggesting that the black hole may be changing the shape of its host galaxy much more than previously thought. ing. ”

For scientists, this research improves our understanding of how black holes and the galaxies around them interact. Many galaxies appear to have large regions around their centers where few new stars form. This may be explained by the black hole’s wind sweeping away star-forming gas.

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Source: www.sciencefocus.com