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#1996 | |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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Quote:
Basically she's taking the existence of Hawking radiation to mean that something escapes a black hole and therefore negates it from ever reaching a singularity. Math is here: http://arxiv.org/abs/arXiv:1409.1837 I'm not sure what to think...
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Posts: 48,137
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#1997 | |
Space Cadet and Aczabel
Join Date: Aug 2000
Location: Kanab, UT, USA
Casino cash: $9333275
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Quote:
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Thanks, Trump for the civics lesson. We are learning so much about RICO, espionage, sedition, impeachment, the 25th Amendment, order of succession, nepotism, separation of powers, 1st Amendment, obstruction of justice, the emoluments clause, conflicts of interest, collusion, sanctions, oligarchs, money laundering and so much more. |
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Posts: 40,584
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#1998 |
Space Cadet and Aczabel
Join Date: Aug 2000
Location: Kanab, UT, USA
Casino cash: $9333275
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OK I she what she is saying. This applies to a star collapsing into a black hole not a supermassive black hole like exists at the center of galaxies.
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Thanks, Trump for the civics lesson. We are learning so much about RICO, espionage, sedition, impeachment, the 25th Amendment, order of succession, nepotism, separation of powers, 1st Amendment, obstruction of justice, the emoluments clause, conflicts of interest, collusion, sanctions, oligarchs, money laundering and so much more. |
Posts: 40,584
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#1999 |
Yum! Buc Marshmellows!
Join Date: Apr 2006
Location: None of your business
Casino cash: $2229963
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Science is boring. Art is way more cool!
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Posts: 163,537
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#2000 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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Science of tattooing... slowmo awesomeness happens at 3:15......
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Posts: 48,137
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#2001 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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I feel terrible about how many of these got me....
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Posts: 48,137
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#2002 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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Young glass mantis eating a blue bottle fly. Because science.......
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#2003 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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That's just awesome...
NASA To Reformat Opportunity Rover’s Memory From 125 Million Miles Away After more than a decade roaming the Red Planet, NASA’s Opportunity rover needs to have its flash memory reformatted in order to resolve computer resets that are interfering with the rover’s science activities. “Flash-memory induced resets have increased in occurrence, preventing meaningful science until this problem can be corrected,” NASA said in an update. The resets, which number a dozen during the month of August, have been occurring with increasing frequency, prompting the rover team to make plans for reformatting the rover’s flash memory. “The flash reformatting is a low-risk process, as critical sequences and flight software are stored elsewhere in other non-volatile memory on the rover,” according to John Callas, project manager for NASA’s Mars Exploration Rover Project. Flash memory is a type of storage commonly used in smartphones and othe digital devices. Over time, individual memory cells can be worn-out due to repeated use. Reformatting erases the memory and identifies bad memory cells so they can be marked to be avoided. This will be the first time Opportunity’s flash memory has been reformatted since it landed on Mars, currently around 125 million miles away from NASA’s Jet Propulsion Laboratory. However, this kind of maintenance has been performed before with the rover’s twin, Spirit, back in 2009 to resolve a series of, what NASA is calling, “amnesia events.” Opportunity, which recently set the record for the longest distance traveled by a rover on another world, has been operating on Mars for over 10 years. If all goes to plan, the little rover that could will be roaming the Red Planet for many years to come.
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#2004 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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I've posted something similar before. But this still absolutely amazes me about the moon...
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#2005 |
Ain't no relax!
Join Date: Sep 2005
Casino cash: $1008919
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Apparently, sleeping in space really sucks... and Ambien walrus in on the space station pretty much all the time.....
Drugs in space and sleepless in the shuttle A fascinating study published in today’s Lancet Neurology reports on sleep deprivation in astronauts but also describes the drugs shuttle crew members use to keep themselves awake and help them fall asleep. The study looked at sleep data from 64 astronauts on 80 space shuttle missions along with 21 astronauts on 13 International Space Station missions, and compared it to their sleep on the ground and in the days before space flight. Essentially, in-flight astronauts don’t get a great deal of shut-eye, but what’s surprising is the range and extent of drugs they use to manipulate sleep. Mostly these are the z-drug class of sleep medications (of which the best known is zolpidem, branded name Ambien) but also include benzos, melatonin and an antipsychotic called quetiapine. Here are the sleep-inducing drugs with my comments in square brackets: Zolpidem and zolpidem controlled release were the most frequently used drugs on shuttle missions, accounting for 301 (73%) and 49 (12%) of the 413 nights, respectively, when one dose of drug was reported. Zaleplon use was reported on 45 (11%) of 413 nights. Other sleep-promoting drugs reported by shuttle crew members during the 413 nights included temazepam [sedative anti-anxiety benzodiazepine - similar to Vallium] on 8 (2%) nights, eszopiclone on 2 (<1%) nights, melatonin [hormone that regulates circadian rhythms] on 7 (2%) nights, and quetiapine fumarate [antipsychotic] on 1 (<1%) night. The paper also notes concerns about the astronauts’ use of zolpidem and similar z-drug medications because they can affect mental sharpness, coordination and can lead to unusual and complex ‘sleep-behaviours’. Interestingly, it seems astronauts tend to use these drugs in a rather ad-hoc manner and the consequences of this have clearly not been well thought through. As the Lancet Neurology paper notes: This consideration is especially important because all crew members on a given mission might be taking a sleep-promoting drug at the same time…. crew members reported taking a second dose of hypnotic drugs—most commonly zolpidem—often only a few hours before awakening. Although crew members are encouraged to try such drugs on the ground at home at least once before their use in flight, such preparations probably do not involve multiple dosing or dosing with two different drugs on the same night. Furthermore, such tests do not include any measure of objective effectiveness or safety, such as what would happen in the case of abrupt awakening during an in-flight night-time emergency… sleep-related-eating, sleep-walking, and sleep-driving events have been reported with zolpidem use, leading the FDA to require a so-called black-box warning on all hypnotic drugs stating that driving and performance of other tasks might be impaired in the morning after use of such drugs: “A variety of abnormal thinking and behavior changes have been reported to occur in association with the use of sedative/hypnotics…. Complex behaviors such as ‘sleep-driving’…have been reported. Amnesia, anxiety, and other neuropsychiatric symptoms may occur unpredictably.” However, use of sleep drugs was reported on more than half the nights before extravehicular activities were undertaken. Information on stimulant use by astronauts is hidden in the appendix but caffeine was widely used in space, but less than when on the ground – although possibly due to coffee shortages, and modafinil was used occasionally. Caffeine was widely used throughout all data collection intervals by both shuttle and ISS crewmembers, though supply shortages sometimes led to coffee rationing and reduced consumption aboard ISS. All but eight shuttle mission crewmembers (72/80, 90%) and all but one ISS crewmember (20/21,95%) reported using caffeine at least once during the study… Given the 3-7 hour half-life of caffeine and the sleep disturbances associated with its use, caffeine may have contributed to or enabled the sleep curtailment observed in this population. However, there is no evidence that caffeine accounts for the reduced sleep duration observed during spaceflight, as caffeine consumption was, if anything, reduced during spaceflight. The wakefulness-promoting medication, modafinil, was reportedly used on both shuttle (10 reported uses) and ISS missions (2 reported uses). The use of this wakefulness-promoting medication was reported more frequently in post-flight debriefs. There’s also an interesting snippet that gives the most common reason for sleep disturbance in space: Nocturnal micturition is common in this age group and was the most reported reason for disruptive sleep both on Earth and inflight Not stress, not being surrounded by equipment, not a lack of home comforts, but ‘Nocturnal micturition’ or wetting yourself in your sleep. This is possibly more likely in space due to the fact that bodily cues for a full bladder work less effectively in zero gravity, but one major factor in astronauts wetting themselves was that it a better alternative than waking sleeping colleagues by going to the toilet. The paper notes that this is why many astronauts wear ‘maximum absorbency garments’ – essentially giant nappies – while they sleep.
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#2006 |
Banned
Join Date: Jan 2013
Casino cash: $9998560
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Partial eclipse coming up today. Starts here in Phoenix in about 1.5 hours.
Check your times here: http://www.timeanddate.com/eclipse/in/usa/phoenix |
Posts: 53,803
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#2007 | |
New and Improved
Join Date: Mar 2002
Location: Springfield, Mo.
Casino cash: $198590
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Quote:
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“As a nation, we can endure damaging policies for a four-year term. But we cannot survive a president willing to terminate our Constitution”
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#2008 |
Veteran
Join Date: Nov 2010
Location: KC
Casino cash: $9925938
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[IMG][/IMG]
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Posts: 3,859
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#2009 | ||
Mindful Taoist German
Join Date: Aug 2000
Casino cash: $7571662
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I've wondered about this, and I need someone much smarter than me to explain it, but what prevents us from burning methane/human or animal waste to fuel power?
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#2010 |
Needs more middle fingers
Join Date: Mar 2005
Location: San Diego
Casino cash: $3283063
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We would need a REALLY ****ing big Fart Jar.
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Life is like a dick. Sometimes it gets hard for no reason, but it can't stay hard forever. |
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