Skip to main content

Home/ Long Game/ Group items tagged layscience

Rss Feed Group items tagged

anonymous

Your Commute Is Killing You - 2 views

shared by anonymous on 10 Jun 11 - Cached
  • This week, researchers at Umea University in Sweden released a startling finding: Couples in which one partner commutes for longer than 45 minutes are 40 percent likelier to divorce.
  • Commuting is a migraine-inducing life-suck—a mundane task about as pleasurable as assembling flat-pack furniture or getting your license renewed, and you have to do it every day.
  • First, the research proves the most obvious point: We dislike commuting itself, finding it unpleasant and stressful.
  • ...8 more annotations...
  • That unpleasantness seems to have a spillover effect: making us less happy in general.
  • Long commutes also make us feel lonely.
  • Those stressful hours spent listening to drive-time radio do not merely make us less happy. They also make us less healthy.
  • It is commuting, not the total length of the workday, that matters, he found. Take a worker with a negligible commute and a 12-hour workday and a worker with an hourlong commute and a 10-hour workday. The former will have healthier habits than the latter, even though total time spent on the relatively stressful, unpleasant tasks is equal.
  • overall, people with long commutes are fatter, and national increases in commuting time are posited as one contributor to the obesity epidemic.
  • So, in summary: We hate commuting. It correlates with an increased risk of obesity, divorce, neck pain, stress, worry, and sleeplessness. It makes us eat worse and exercise less. Yet, we keep on doing it.
  • Why do people suffer through it? The answer mostly lies in a phrase forced on us by real-estate agents: "Drive until you qualify."
  • But wait: Isn't the big house and the time to listen to the whole Dylan catalog worth something as well? Sure, researchers say, but not enough when it comes to the elusive metric of happiness. Given the choice between that cramped apartment and the big house, we focus on the tangible gains offered by the latter. We can see that extra bedroom. We want that extra bathtub. But we do not often use them. And we forget that additional time in the car is a constant, persistent, daily burden—if a relatively invisible one.
  •  
    "Long commutes cause obesity, neck pain, loneliness, divorce, stress, and insomnia." - By Annie Lowrey - Slate Magazine
anonymous

Talking to Machines - 1 views

  •  
    "We begin with a love story--from a man who unwittingly fell in love with a chatbot on an online dating site. Then, we encounter a robot therapist whose inventor became so unnerved by its success that he pulled the plug. And we talk to the man who coded Cleverbot, a software program that learns from every new line of conversation it receives...and that's chatting with more than 3 million humans each month. Then, five intrepid kids help us test a hypothesis about a toy designed to push our buttons, and play on our human empathy. And we meet a robot built to be so sentient that its creators hope it will one day have a consciousness, and a life, all its own. "
  •  
    I spent a while trying to find the Authors @Google video I watched a while back, where she explains her step from tech enthusiast towards the wary. At the end, it becomes more of a direct attack on computers that act humans.
anonymous

There was scale and structure before history - 0 views

  • even if genetics is not determinate or even fundamentally specially insightful, it will at least sharpen the discussions, and move scholars away from arguments of rhetorical excess.
  • The “demic diffusion” model to some extent seems to play into this, where simple demographic population growth due to the ability of farmers to extract more calories per unit of land allowed them to “swamp” the hunter-gatherers.
  • the major problem with these models is that they downplay by understandable omission the higher order social complexity of institutions and identities which characterize humans.
  • ...5 more annotations...
  • The Inca for example did not have full elaborated literacy, and yet had political dominion and cultural hegemony from Ecuador to central Chile.
  • the genetic references are thin and somewhat outdated
  • I think the genetics is now making a stronger case for disruption, confusion, and replacement, than is acknowledged in this article.
  • we must look to punctuation of cultural and demographic change as the norm, rather than the exception. The old diffusion models may be predicated on a level of smoothness and gradualism in historical and social process which are simply not feasible.
  • The long pause of agriculture on the north European plain was partly probably the structural constraint because of the poor fit between southern crops and northern climes. But once a sufficient fit was operative did that naturally result in the rapid sweep of farmers north? Perhaps not.
  •  
    "Until relatively recently the spread of agriculture in Europe, and to some extent the whole world, was pigeon-holed into two maximalist models: cultural or demographic diffusionist. Neither of these models were maximalist in that they denied the impact of culture or demographics in totality, but they tended to be rhetorically brandished in a manner where it was clear which dynamic was the dominant mode of explaining the nature of cultural and genetic variation and their origins."
anonymous

Newly-discovered galactic arm means the Milky Way is more warped than we thought - 0 views

  • Here's our current understanding of the Milky Way's geography. The central bar has a huge proportion of our galaxy's stars, and jutting off of it are the two main arms of the spiral, which are the Perseus Arm and the Scutum-Centaurus Arm. The other four arms are mostly just gas and relatively unimportant. Our solar system is close to the Perseus Arm, which extends about 300 degrees around galactic center.
  • The discovery of this new arm provides good evidence that the Scutum-Centaurus Arm is just as large and expansive as the Perseus Arm, suggesting we live in an almost perfectly symmetrical galaxy.
  •  
    "It was back in 1852 that College of New Jersey astronomer Stephen Alexander first suggested the galaxy has a spiral shape. Since then, we've identified at least six arms of that spiral, and in the 1990s we found evidence that there is a star-heavy central bar running through the galactic plane. It's not easy figuring all this out because our neighboring stars tend to obscure the ones further away, making it difficult to identify our galaxy's larger structures with precision."
anonymous

Images capture moment brain goes unconscious - 0 views

  • As the patient goes under, different parts of the brain seem to be "talking" to each other, a team told the European Anaesthesiology Congress in Amsterdam.
  • they caution that more work is needed to understand what is going on.
  • unconsciousness is a process by which different areas of the brain inhibit each other as the brain shuts down.
  •  
    "For the first time researchers have monitored the brain as it slips into unconsciousness. The new imaging method detects the waxing and waning of electrical activity in the brain moments after an anaesthetic injection is administered."
anonymous

How your immune system fires off electrons to repair DNA damage - 0 views

  • One regular offender is the cyclobutane pyrimidine dimer. It's a bulbous ring attached to the elegant double helix of the DNA strand. It latches on to the damaged parts of DNA and is replicated along with them, causing widespread damage. Once it gets started, it can grow until it takes over the system.
  • Fortunately, help is on the way, in the form of an enzyme called photolyase.
  • Photolyase floats around the body, looking for encroachment from the dark side. This enzyme powers itself up using blue light, and then shoots out an electron.
  • ...3 more annotations...
  • Homegrown resistance speeds it along its way. A molecule in the ring allows the electron to move faster along the ring than it could by hoping through the gap in the middle.
  • The whole process takes less than a hundred trillionths of a second, and when the photolyase hits all the right spots with its electron, the ring is blasted away and the DNA repairs itself to form a perfect strand.
  • Photolyase runs through fish and reptilian systems, but is unknown in mammals. Scientists are now trying to find a way to synthesize and mass-produce this enzyme, so that one day we might be able to repair our DNA with a simple lotion.
  •  
    Scientists have found out how a famous sunburn-healing enzyme works. The way it zaps DNA damage sounds so science fictional that it seems like something that happened a long time ago, in a galaxy far, far away.
anonymous

The Core Ideas of Science - 0 views

  • Here’s the web page for the report, a summary (pdf), and the report itself (pdf, free after you register).
  • The first category is “Scientific and Engineering Practices,” and includes such laudable concepts as ” Analyzing and interpreting data.”
  • The second category is “Crosscutting Concepts That Have Common Application Across Fields,” by which they mean things like “Scale, proportion, and quantity” or ” Stability and change.
  • ...2 more annotations...
  • The third category is the nitty-gritty, “Core Ideas in Four Disciplinary Areas,” namely “Physical Sciences,” “Life Sciences,” “Earth and Space Sciences,” and “Engineering, Technology, and the Applications of Science.”
  • Whether or not these concepts and the grander conceptual scheme actually turn out to be useful will depend much more on implementation than on this original formulation. The easy part is over, in other words. The four ideas above seem vague at first glance, but they are spelled out in detail in the full report, with many examples and very specific benchmarks.
  •  
    "A National Academy of Sciences panel, chaired by Helen Quinn, has released a new report that seeks to identify 'the key scientific practices, concepts and ideas that all students should learn by the time they complete high school.'" Conspicuously missing from Discover writeup: methodology. I'd pair that with critical thinking. Are either of those prime requirements, yet?
anonymous

NASA Spacecraft Data Suggest Water Flowing on Mars - 0 views

  • Dark, finger-like features appear and extend down some Martian slopes during late spring through summer, fade in winter, and return during the next spring. Repeated observations have tracked the seasonal changes in these recurring features on several steep slopes in the middle latitudes of Mars' southern hemisphere.
  • "The best explanation for these observations so far is the flow of briny water," said Alfred McEwen of the University of Arizona, Tucson.
  • When researchers checked flow-marked slopes with the orbiter's Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), no sign of water appeared. The features may quickly dry on the surface or could be shallow subsurface flows.
  • ...1 more annotation...
  • "The flows are not dark because of being wet," McEwen said. "They are dark for some other reason."
  •  
    "Observations from NASA's Mars Reconnaissance Orbiter have revealed possible flowing water during the warmest months on Mars."
anonymous

Is your depression caused by brain inflammation? - 0 views

  •  
    "Neuroscientists have linked depression to brain inflammation before, and now a new study suggests further evidence for this theory."
anonymous

The Mind-Reading Salmon: The True Meaning of Statistical Significance - 0 views

  • The p-value is an all-purpose measure that scientists often use to determine whether or not an experimental result is “statistically significant.”
  • The p-value puts a number on the effects of randomness. It is the probability of seeing a positive experimental outcome even if your hypothesis is wrong.
  • Many scientific papers make 20 or 40 or even hundreds of comparisons. In such cases, researchers who do not adjust the standard p-value threshold of 0.05 are virtually guaranteed to find statistical significance in results that are meaningless statistical flukes.
  •  
    "If you want to convince the world that a fish can sense your emotions, only one statistical measure will suffice: the p-value."
anonymous

Ten Great Public Health Achievements-United States, 2001-2010 - 1 views

  •  
    "During the 20th century, life expectancy at birth among U.S. residents increased by 62%, from 47.3 years in 1900 to 76.8 in 2000, and unprecedented improvements in population health status were observed at every stage of life.1 In 1999, MMWR published a series of reports highlighting 10 public health achievements that contributed to those improvements. This report assesses advances in public health during the first 10 years of the 21st century. Public health scientists at CDC were asked to nominate noteworthy public health achievements that occurred in the United States during 2001-2010. From those nominations, 10 achievements, not ranked in any order, have been summarized in this report." July 6, 2011, 306 (1): 36 - JAMA
anonymous

Salt: More confirmation bias for your preferred narrative - 0 views

  • When it comes to health, it’s the hard outcomes we care about. We pay attention to measures like high blood pressure (hypertension) because of the relationship between hypertension and events like heart attacks and strokes. The higher the blood pressure, the greater the risk of these events. The relationship between the two is well established. So when it comes to preventive health, we want to lower blood pressure to reduce the risk of subsequent effects. Weight loss, diet, and exercise are usually prescribed (though often insufficient) to reduce blood pressure. For many, drug treatment is still required.
  • There is reasonable population-level data linking higher levels of salt consumption with higher blood pressure.
  • From a population perspective, interventions that dramatically lower salt intake result in lower blood pressure.
  • ...12 more annotations...
  • the causality between salt consumption, and all of these negative effects, is less clear.
  • So does reducing dietary salt reduce cardiovascular events? That’s the key question.
  • When it comes to clinical practice guidelines, low salt diets are the mainstays of pretty much every set of guidelines on the management of high blood pressure.
  • The evidence supporting the relationship with hard outcomes is robust, but not rock-solid. We don’t have causal data, but we do have considerable epidemiologic evidence to suggest that reducing dietary salt consumption is likely to offer net benefits in the management of hypertension.
  • The vast majority of the salt we eat (75%) is from processed foods. Restaurants are a large source, too.
  • Few foods in their original state are naturally high in salt, and in general, we don’t add that much at the table.
  • Seven studies made up this meta-analysis, including 6,489 patients in total. Three studies looked at those with normal blood pressure, two included patients with high blood pressure, and one was a mixed population, including patients with heart failure. The overall effect? Interventions had small effects on sodium consumption, which led to small effects on blood pressure. There was insufficient information to analyze the effects on cardiovascular disease endpoints.
  • The authors go on to make the following point, which was ignored in the media coverage: Our findings are consistent with the belief that salt reduction is beneficial in normotensive and hypertensive people. However, the methods of achieving salt reduction in the trials included in our review, and other systematic reviews, were relatively modest in their impact on sodium excretion and on blood pressure levels, generally required considerable efforts to implement and would not be expected to have major impacts on the burden of CVD.
  • The authors did not conclude that reducing salt consumption is ineffective.
  • Despite the modest and equivocal results, the authors seem to have lost the narrative on their own research findings: Professor Rod Taylor, the lead researcher of the review, is ‘completely dismayed’ at the headlines that distort the message of his research published today. Having spoken to BBC Scotland, and to CASH, he clarified that the review looked at studies where people were advised to reduce salt intake compared to those who were not and found no differences, this is not because reduced salt doesn’t have an effect but because it’s hard to reduce salt intake for a long time. He stated that people should continue to strive to reduce their salt intake to reduce their blood pressure, but that dietary advice alone is not enough, calling for further government and industry action.
  • The true finding from the Cochrane review is that dietary interventions to reduce salt intake are largely ineffective at reducing salt consumption.
  • Until the data are more clear, you can find the data to support whatever narrative you believe. If you want to demonize salt and ignore other factors that contribute to poor cardiovascular outcomes, you can do that. And if you believe that interventions to reduce salt consumption are misguided and unwarranted, and symptomatic of an overreaching nanny state, then you can find data to support that position, too.
  •  
    "Judging by the recent press reports, the latest Cochrane review reveals that everything we've been told about eating salt, and cardiovascular disease, is wrong."
anonymous

Mass Extinction Easier to Trigger Than Thought - 0 views

  • The cataclysmic extinctions that scoured Earth 200 million years ago might have been easier to trigger than expected, with potentially troubling contemporary implications.
  • Rather than 600,000 years of volcanic activity choking Earth’s atmosphere with carbon dioxide, just a few thousand years apparently sufficed to raise ocean temperatures so potent greenhouse gases trapped in seafloor mud came bubbling up.
  • “It could happen again. It’s only the boundary conditions that we don’t know.”
  • ...5 more annotations...
  • In what scientists call the end-Triassic mass extinction, at least half of all living species simply disappear from the fossil record. The die-off didn’t merely cause ecological disruption. It was so sudden and profound that planetary chemical cycles went haywire for the next several million years.
  • The leading explanation for the extinction invokes extended, climate-altering volcanic activity caused by splitting continental plates, but earlier research by Ruhl suggested a more nuanced and jarring narrative.
  • “A small release of CO2 from volcanoes triggered a small change in the global climate, raising land and ocean temperatures. That led to the release of methane from the seafloor,” said Ruhl.
  • Scientists have raised the possibility that rising global temperatures could release trapped methane into the atmosphere, further raising temperatures and releasing more methane in a feedback loop of warming and planetary disruption. That’s apparently what happened during the end-Triassic extinction.
  • Exactly how much warming would be needed to start the loop anew, and how much methane would flow forth, are open questions. “We could potentially trigger a small increase in ocean temperatures, which triggers methane release,” said Ruhl. “But it’s difficult to quantify how much methane is in the ocean these days. Maybe we have less methane in seafloors now. Maybe we have more.”
  •  
    What a lovely headline! Anyway, humans could have an easier time doing stuff that could obliterate us. Viva evolution!
anonymous

A single mutant gene is responsible for 30% of all mysterious pain - 0 views

  • Yale researchers, working with colleagues in the Netherlands, found that this particular gene is responsible for the horrifically named "Man on Fire Syndrome", a rare disorder marked by pain so severe that it's like...well, I think you can probably guess what it's like.
  • What's more, when the researchers examined 28 patients with peripheral neuropathy that could not otherwise be explained, 30% of the patients showed mutations in the SCNA9.
  •  
    "In the United States alone, 20 million people suffer from peripheral neuropathy, a condition that involves nerve degeneration and sometimes extreme pain, often without any explanation. Now we've found the culprit for this mysterious pain...and it's all one gene's fault. "
anonymous

Stress in the city - 0 views

  • A new international study, which involved Douglas Mental Health University Institute researcher Jens Pruessner, is the first to show that two distinct brain regions that regulate emotion and stress are affected by city living.
  • "These findings suggest that different brain regions are sensitive to the experience of city living during different times across the lifespan," says Pruessner. "Future studies need to clarify the link between psychopathology and these affects in individuals with mental disorders.These findings contribute to our understanding of urban environmental risk for mental disorders and health in general. They further point to a new approach to interface social sciences, neurosciences and public policy to respond to the major health challenge of urbanization."
  •  
    "Being born and raised in a major urban area is associated with greater lifetime risk for anxiety and mood disorders."
anonymous

Scientists are from Mars, the public is from Earth | Bad Astronomy | Discover Magazine - 1 views

  •  
    The American Geophysical Union blog has a link up to a very interesting table, and I feel strongly enough about this topic that I want to share it with you. It's a list of words scientists use when writing or otherwise communicating science, what the scientists mean when they use that word, and most importantly what the public hears.
« First ‹ Previous 81 - 96 of 96
Showing 20 items per page