Skip to main content

Home/ TOK Friends/ Group items tagged mutation

Rss Feed Group items tagged

Filter: All | Bookmarks | Topics Simple Middle
sanderk

Is Pain a Construct of the Mind? - Scientific American - 0 views

www.scientificamerican.com/...is-pain-construct-of-mind

pain mind science brain science emotions research

shared by sanderk on 21 Oct 19 - No Cached
  • Clear Lake found that Rogers could recruit an abnormally high number of muscle fibers. But was this ability because of a freak genetic mutation? Another possibility, which Rogers thinks is more likely, is the way he processes pain when he strains those muscles.
  • What if, instead of superpowered muscles, Rogers has a normal—though extremely well exercised—body, and his abilities arise because he can withstand more pain than most mere mortals?
  • Rogers reasons that, unlike in the dentist's office—where he has no control over the pain that is inflicted on him—he has direct executive control over pain that he inflicts on himself. “I know it's coming, I have an idea of what to expect and I can decide to ignore it,” he says. Confronted with severe pain, most people fear that they will damage their body permanently if they persist, so they stop well before they are in real danger, Rogers explains.
  • ...2 more annotations...
  • Maybe Rogers's muscle cells are normal, and he experiences pain as most of us do but chooses to disregard it when he feels in command.
  • An illusion is a perception that does not match the physical reality. Is pain, then, as with illusions, a mind construct that some people can decide to turn off? As you will see in the studies that follow, pain varies as a function of mood, attentiveness and circumstances, lending support to the theory that pain is an emotion.
  • sanderk on 21 Oct 19
     
    During practice, my coaches always say that I need to overcome pain but I never knew how. I found this article interesting because it says that pain is an emotion. I have never thought that pain could even be close to an emotion. It is interesting how the world's strongest man can just ignore the pain and keep doing these incredible feats. Controlling one's pain must either be a skill or just a natural-born gift. Like in TOK, we must practice skills such as controlling our emotions. If pain is an emotion, then theoretically, I could control it. I am going to test this out in my life and see if I can control my own pain during exercise.
blythewallick

Brave new world: Simple changes in intensity of weather events 'could be lethal' -- Sci... - 0 views

www.sciencedaily.com/...190930131549.htm

research science

shared by blythewallick on 19 Oct 19 - No Cached
  • "It is difficult to predict how organisms will respond to changes in extreme events because these events tend to be, by definition, quite rare," Botero said. "But we can have a pretty good idea of how any given species may respond to current changes in this aspect of climate -- if we pay attention to its natural history, and have some idea of the climatic regime it has experienced in the past."
  • develop an evolutionary model of how populations respond to rare environmental extremes. (Think: 500-year floods.) These rare events can be tricky for evolution because it is difficult to adapt to hazards that are almost never encountered
  • Haaland and Botero also found that factors speeding up trait evolution are generally likely to hinder -- rather than favor -- adaptation to rare selection events. Part of the reason: High mutation rates tend to facilitate the process of adaptation to normal conditions during the long intervals in between environmental extremes.
  • ...4 more annotations...
  • "Our results challenge the idea that species that have been historically exposed to more variable environments are better suited to cope with climate change," Botero said.
  • The simple framework that Haaland and Botero describe can be applied to any kind of environmental extreme including flooding, wildfires, heatwaves, droughts, cold spells, tornadoes and hurricanes -- any and all of which might be considered part of the "new normal" under climate change.
  • "In this case, our model suggests that the typical inhabitants of these places are likely to be more vulnerable to hotter temperatures than to longer or more widespread heat waves."
  • "While this simple conservation action is unlikely to completely shift the balance from a 'conservative' to a 'care-free' evolutionary response to extreme events, it may nevertheless reduce the strongest vulnerability of these 'conservative' lizard populations," Botero said. "It might just buy them enough time to accumulate sufficient evolutionary changes in their toes and limbs to meet the new demands of their altered habitat."
Javier E

What Do We Lose If We Lose Twitter? - The Atlantic - 0 views

www.theatlantic.com/...672158

social media twitter effect

shared by Javier E on 17 Nov 22 - No Cached
  • What do we lose if we lose Twitter?
  • At its best, Twitter can still provide that magic of discovering a niche expert or elevating a necessary, insurgent voice, but there is far more noise than signal. Plenty of those overenthusiastic voices, brilliant thinkers, and influential accounts have burned out on culture-warring, or have been harassed off the site or into lurking.
  • Twitter is, by some standards, a niche platform, far smaller than Facebook or Instagram or TikTok. The internet will evolve or mutate around a need for it. I am aware that all of us who can’t quit the site will simply move on when we have to.
  • ...15 more annotations...
  • Perhaps the best example of what Twitter offers now—and what we stand to gain or lose from its demise—is illustrated by the path charted by public-health officials, epidemiologists, doctors, and nurses over the past three years.
  • They offered guidance that a flailing government response was too slow to provide, and helped cobble together an epidemiological picture of infections and case counts. At a moment when people were terrified and looking for any information at all, Twitter seemed to offer a steady stream of knowledgeable, diligent experts.
  • But Twitter does another thing quite well, and that’s crushing users with the pressures of algorithmic rewards and all of the risks, exposure, and toxicity that come with virality
  • t imagining a world without it can feel impossible. What do our politics look like without the strange feedback loop of a Twitter-addled political press and a class of lawmakers that seems to govern more via shitposting than by legislation
  • What happens if the media lose what the writer Max Read recently described as a “way of representing reality, and locating yourself within it”? The answer is probably messy.
  • here’s the worry that, absent a distributed central nervous system like Twitter, “the collective worldview of the ‘media’ would instead be over-shaped, from the top down, by the experiences and biases of wealthy publishers, careerist editors, self-loathing journalists, and canny operators operating in relatively closed social and professional circles.”
  • many of the most hyperactive, influential twitterati (cringe) of the mid-2010s have built up large audiences and only broadcast now: They don’t read their mentions, and they rarely engage. In private conversations, some of those people have expressed a desire to see Musk torpedo the site and put a legion of posters out of their misery.
  • Many of the past decade’s most polarizing and influential figures—people such as Donald Trump and Musk himself, who captured attention, accumulated power, and fractured parts of our public consciousness—were also the ones who were thought to be “good” at using the website.
  • the effects of Twitter’s chief innovation—its character limit—on our understanding of language, nuance, and even truth.
  • “These days, it seems like we are having languages imposed on us,” he said. “The fact that you have a social media that tells you how many characters to use, this is language imposition. You have to wonder about the agenda there. Why does anyone want to restrict the full range of my language? What’s the game there?
  • in McLuhanian fashion, the constraints and the architecture change not only what messages we receive but how we choose to respond. Often that choice is to behave like the platform itself: We are quicker to respond and more aggressive than we might be elsewhere, with a mindset toward engagement and visibility
  • it’s easy to argue that we stand to gain something essential and human if we lose Twitter. But there is plenty about Twitter that is also essential and human.
  • No other tool has connected me to the world—to random bits of news, knowledge, absurdist humor, activism, and expertise, and to scores of real personal interactions—like Twitter has
  • What makes evaluating a life beyond Twitter so hard is that everything that makes the service truly special is also what makes it interminable and toxic.
  • the worst experience you can have on the platform is to “win” and go viral. Generally, it seems that the more successful a person is at using Twitter, the more they refer to it as a hellsite.
Javier E

If We Knew Then What We Know Now About Covid, What Would We Have Done Differently? - WSJ - 0 views

www.wsj.com/...covid-lessons-learned-9dd5566f

politics us history crisis culture policy trump pandemic response science psychology

shared by Javier E on 12 Mar 23 - No Cached
  • For much of 2020, doctors and public-health officials thought the virus was transmitted through droplets emitted from one person’s mouth and touched or inhaled by another person nearby. We were advised to stay at least 6 feet away from each other to avoid the droplets
  • A small cadre of aerosol scientists had a different theory. They suspected that Covid-19 was transmitted not so much by droplets but by smaller infectious aerosol particles that could travel on air currents way farther than 6 feet and linger in the air for hours. Some of the aerosol particles, they believed, were small enough to penetrate the cloth masks widely used at the time.
  • The group had a hard time getting public-health officials to embrace their theory. For one thing, many of them were engineers, not doctors.
  • ...37 more annotations...
  • “My first and biggest wish is that we had known early that Covid-19 was airborne,”
  • , “Once you’ve realized that, it informs an entirely different strategy for protection.” Masking, ventilation and air cleaning become key, as well as avoiding high-risk encounters with strangers, he says.
  • Instead of washing our produce and wearing hand-sewn cloth masks, we could have made sure to avoid superspreader events and worn more-effective N95 masks or their equivalent. “We could have made more of an effort to develop and distribute N95s to everyone,” says Dr. Volckens. “We could have had an Operation Warp Speed for masks.”
  • We didn’t realize how important clear, straight talk would be to maintaining public trust. If we had, we could have explained the biological nature of a virus and warned that Covid-19 would change in unpredictable ways.  
  • We didn’t know how difficult it would be to get the basic data needed to make good public-health and medical decisions. If we’d had the data, we could have more effectively allocated scarce resources
  • In the face of a pandemic, he says, the public needs an early basic and blunt lesson in virology
  • and mutates, and since we’ve never seen this particular virus before, we will need to take unprecedented actions and we will make mistakes, he says.
  • Since the public wasn’t prepared, “people weren’t able to pivot when the knowledge changed,”
  • By the time the vaccines became available, public trust had been eroded by myriad contradictory messages—about the usefulness of masks, the ways in which the virus could be spread, and whether the virus would have an end date.
  • , the absence of a single, trusted source of clear information meant that many people gave up on trying to stay current or dismissed the different points of advice as partisan and untrustworthy.
  • “The science is really important, but if you don’t get the trust and communication right, it can only take you so far,”
  • people didn’t know whether it was OK to visit elderly relatives or go to a dinner party.
  • Doctors didn’t know what medicines worked. Governors and mayors didn’t have the information they needed to know whether to require masks. School officials lacked the information needed to know whether it was safe to open schools.
  • Had we known that even a mild case of Covid-19 could result in long Covid and other serious chronic health problems, we might have calculated our own personal risk differently and taken more care.
  • just months before the outbreak of the pandemic, the Council of State and Territorial Epidemiologists released a white paper detailing the urgent need to modernize the nation’s public-health system still reliant on manual data collection methods—paper records, phone calls, spreadsheets and faxes.
  • While the U.K. and Israel were collecting and disseminating Covid case data promptly, in the U.S. the CDC couldn’t. It didn’t have a centralized health-data collection system like those countries did, but rather relied on voluntary reporting by underfunded state and local public-health systems and hospitals.
  • doctors and scientists say they had to depend on information from Israel, the U.K. and South Africa to understand the nature of new variants and the effectiveness of treatments and vaccines. They relied heavily on private data collection efforts such as a dashboard at Johns Hopkins University’s Coronavirus Resource Center that tallied cases, deaths and vaccine rates globally.
  • For much of the pandemic, doctors, epidemiologists, and state and local governments had no way to find out in real time how many people were contracting Covid-19, getting hospitalized and dying
  • To solve the data problem, Dr. Ranney says, we need to build a public-health system that can collect and disseminate data and acts like an electrical grid. The power company sees a storm coming and lines up repair crews.
  • If we’d known how damaging lockdowns would be to mental health, physical health and the economy, we could have taken a more strategic approach to closing businesses and keeping people at home.
  • t many doctors say they were crucial at the start of the pandemic to give doctors and hospitals a chance to figure out how to accommodate and treat the avalanche of very sick patients.
  • The measures reduced deaths, according to many studies—but at a steep cost.
  • The lockdowns didn’t have to be so harmful, some scientists say. They could have been more carefully tailored to protect the most vulnerable, such as those in nursing homes and retirement communities, and to minimize widespread disruption.
  • Lockdowns could, during Covid-19 surges, close places such as bars and restaurants where the virus is most likely to spread, while allowing other businesses to stay open with safety precautions like masking and ventilation in place.  
  • The key isn’t to have the lockdowns last a long time, but that they are deployed earlier,
  • If England’s March 23, 2020, lockdown had begun one week earlier, the measure would have nearly halved the estimated 48,600 deaths in the first wave of England’s pandemic
  • If the lockdown had begun a week later, deaths in the same period would have more than doubled
  • It is possible to avoid lockdowns altogether. Taiwan, South Korea and Hong Kong—all countries experienced at handling disease outbreaks such as SARS in 2003 and MERS—avoided lockdowns by widespread masking, tracking the spread of the virus through testing and contact tracing and quarantining infected individuals.
  • With good data, Dr. Ranney says, she could have better managed staffing and taken steps to alleviate the strain on doctors and nurses by arranging child care for them.
  • Early in the pandemic, public-health officials were clear: The people at increased risk for severe Covid-19 illness were older, immunocompromised, had chronic kidney disease, Type 2 diabetes or serious heart conditions
  • t had the unfortunate effect of giving a false sense of security to people who weren’t in those high-risk categories. Once case rates dropped, vaccines became available and fear of the virus wore off, many people let their guard down, ditching masks, spending time in crowded indoor places.
  • it has become clear that even people with mild cases of Covid-19 can develop long-term serious and debilitating diseases. Long Covid, whose symptoms include months of persistent fatigue, shortness of breath, muscle aches and brain fog, hasn’t been the virus’s only nasty surprise
  • In February 2022, a study found that, for at least a year, people who had Covid-19 had a substantially increased risk of heart disease—even people who were younger and had not been hospitalized
  • respiratory conditions.
  • Some scientists now suspect that Covid-19 might be capable of affecting nearly every organ system in the body. It may play a role in the activation of dormant viruses and latent autoimmune conditions people didn’t know they had
  •  A blood test, he says, would tell people if they are at higher risk of long Covid and whether they should have antivirals on hand to take right away should they contract Covid-19.
  • If the risks of long Covid had been known, would people have reacted differently, especially given the confusion over masks and lockdowns and variants? Perhaps. At the least, many people might not have assumed they were out of the woods just because they didn’t have any of the risk factors.
« First ‹ Previous 41 - 44 of 44
Showing 20▼ items per page