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Everything posted by Sensei
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Can a silver dollar be used to santize water?
Sensei replied to Elite Engineer's topic in Biochemistry and Molecular Biology
Microscope view of Silver while touching bacteria This is also worth reading https://en.wikipedia.org/wiki/Medical_uses_of_silver According to this Silver could make antibiotics thousands times more effective http://www.nature.com/news/silver-makes-antibiotics-thousands-of-times-more-effective-1.13232 But Argyria is not what you would like to have... https://en.wikipedia.org/wiki/Argyria (better to have Argyria than die anyway for mortal human, I guess) -
Restaurant owner installs fridge outside to feed the homeless http://www.independent.co.uk/news/world/asia/restaurant-owner-installs-fridge-outside-to-feed-the-homeless-a6963861.html "Minu Pauline, owner of the Pappadavada restaurant, in Kochi, southern India, was moved to combat both food waste and hunger after seeing people scavanging waste food from bins."
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saposjoint.net is blocking me, and I am not able to see what you wrote about Cl-38. Please be so kind and explain in what amount Cl-38 was found, what was other people interpretations, you said that you disagree with them, and then share your own interpretation.
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Cranks, Crackpots, and Speculators - this one's for you...
Sensei replied to imatfaal's topic in Science News
You should pin this thread in Speculations forum section. They won't find it in Science News.. -
The real life experience can lead to posttraumatic stress disorder, PTSD. https://en.wikipedia.org/wiki/Posttraumatic_stress_disorder ps. I see your nickname. There were a few cases that gamer committed suicide in the real world, after death of his/her player in game. But these are very rare events. https://en.wikipedia.org/wiki/Video_game_addiction#Notable_deaths This comment should not be understood as "request to ban computer games". They can also cure somebody else. There is time for game, there is time for learning, there is time for friends and sport, and other activities. I have often played f.e. Counter-Strike, and Counter-Strike: Source, while waiting for restart of map, making exercises (joining sport and entertainment) ps2. OTOH, your nickname suggest you are already addicted. Not sure what for telling inside of nickname on the science forum, you play some game.
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Lighter Flame inside Nasal Cavity.
Sensei replied to panther123's topic in Anatomy, Physiology and Neuroscience
If you are not writing from Intensive care unit already, you're fine.. Nonsense. Make scientific experiment: Take cigarette lighter, and piece of raw meat with bone some inside, turn it on, and keep that way. After a few seconds, you will still be able to hold piece of meat with fingers. Not serious change of temperature. And meat in the worst case will have slightly changed color. Are you cooking? Grilling? How long it takes to make a dinner on pan which has 200 C or so.. ? None. If it would pass through, you would be already dead, unable to breath for too long time, because fire needs Oxygen to keep burning, which is in air. Scientific experiment: burn candle, place on it glass up side down, observe fire. Blink and fire is gone. No access to Oxygen.. Somebody would be long time dead.. Skull is made of Calcium Phosphate and Calcium Carbonate CaCO3. Trying to burn it is like trying to burn egg shell with cigarette lighter. Are you able to? You would spend plentiful of time, and make cooked egg. Make experiment. Try burning egg. Better use blowtorch.. The main issue with such injures are pathogens. People seriously injured by flames are all the time on morphine or similar painkillers to not feel the pain.. http://www.hindawi.com/journals/ijpedi/2010/825657/ "Morphine has the lowest lipid solubility of all the opioids, which accounts for its slow entry into the brain and subsequent delayed onset of clinical effect. Its peak analgesic effect occurs 10–20 minutes after IV administration of a bolus dose of 0.1 mg/kg. While administering morphine as continuous infusion, younger children should be managed in a High Dependency or Intensive Care area. (Dosage for children 6 months of age is 0–12.5 g/kg/hour and for children 6 months of age is 0–25 g/kg/hour.) Rate and dosage should be adjusted according to child’s pain and sedation scores. Morphine PCA can be used in children 5 years who have the ability to understand the workings of a PCA [28]. Bolus dose is usually 20 g/kg with a lockout interval of five minutes and background infusion of 4 to 8 g/kg/hour. In children who have difficulty pressing the “demand” button, this modality may be inappropriate. In this instance, it can be delivered by NCA (nurse controlled analgesia)—usually in a high dependency setting. Bolus dose is 20 g/kg with a background infusion of 0–20 g/kg/hour and a lock out interval of 20–60 minutes. Criteria for administration of a bolus dose are if the pain score is seven or more on a scale of 0–10 and the sedation score no greater than one. Respiratory rate should be above minimum rate for the age of the child and oxygen saturation must be monitored by continuous pulse oximetry." Painkillers are often button press released to blood by patients who are awake. -
In 1 Liter = 0.001 m^3, at temperature 273.15 K and pressure 101325 Pa, there is 0.04464 mol. (f.e. air at sea level and at 0 C temperature) 1L * 1000 = 1m^3 0.04464 mol/L * 1000 = 44.64 mol/m^3 1 mol = 6.022141*10^23 molecules. 44.64 mol = 44.64 * 6.022141*10^23 = 2.6882837424*10^25 molecules. 3 atoms versus 2.69*10^25. Nearly 10^25 times as much. These "3 average atoms per m^3" are accelerated, as they were ejected by stars in f.e. solar flare. Accelerated to significant fraction of speed of light. Blink and these 3 atoms are gone, and new replacement particles are passing through the same region. Not presence of protons or electrons, does not mean that there is no neutrinos (matter), anti-neutrinos (anti-matter), and photons. If somebody is in cosmos between galaxies, still can see galaxies and stars, right? So, photons have to arrive and pass through your reference m^3 of volume. The same with neutrinos and antineutrinos emitted by the all stars, the all galaxies, around him/her. There is ~65 billions of neutrinos passing through every 1cm^2 of area of your body per second just from the Sun.
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What's a good way to earn money with Computer Science?
Sensei replied to fredreload's topic in Computer Science
That depends whether you want to concentrate on enterprise clients, or private clients. Private clients pay immediately, prior receiving software, relatively small amount of money. So there is needed plentiful of them each month. Enterprise clients pay after delay (could be even 90 days, see VAT tax pay delays), when job is done, if it's contracted job, so there is risk you work for nothing if client won't pay ever. Each client will pay much more than private clients. But often it's single time job, that cannot be reused, or resold to multiple clients. Large contract which is not paid (f.e. client bankrupt after receiving it, but didn't pay), could end up in your's company bankruptcy. Because you have to pay VAT tax to government from money that you never saw on eye. Say contract is 1 mln euro, VAT is f.e. 22%, so it's 220,000 euros to pay to government. You should take advance payment and/or split payment to couple smaller chunks while project is progressing (especially modular structure of app). -
In socket library you have couple functions such as: socket() https://msdn.microsoft.com/en-us/library/windows/desktop/ms740506(v=vs.85).aspx It takes couple parameters, whether socket has to be TCP or UDP, ICMP, whether it has to be IPv4 or IPv6 etc. etc. Once you have socket, you should tell socket to which IP to connect, and at which port. It's done by using connect() function: https://msdn.microsoft.com/en-us/library/windows/desktop/ms737625(v=vs.85).aspx IP can be given as series of numbers f.e. 192.168.0.1 or by name. If it's by name you should ask DNS (Domain Name Server), to what IP by numbers it will resolve. gethostbyname() https://msdn.microsoft.com/pl-pl/library/windows/desktop/ms738524(v=vs.85).aspx At the end there has to be used send() function https://msdn.microsoft.com/en-us/library/windows/desktop/ms740149(v=vs.85).aspx Example code using all functions is at the bottom of above MSDN link. Depending what protocol you're using you might want to wait for reply to arrive back using recv() https://msdn.microsoft.com/en-us/library/windows/desktop/ms740121(v=vs.85).aspx If you meant Android gmail application, it's probably using JavaMail API http://stackoverflow.com/questions/2020088/sending-email-in-android-using-javamail-api-without-using-the-default-built-in-a
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If grandpa started shooting to robbers in the Palms Internet Cafe (title from the beginning of video), he had to have gun all the time, since exiting home. Did he knew he will need it exactly this day.. ? Or he carry gun every single day, literally everywhere.. ? Are he so afraid to going outside of his home, that he carry it all the time with him? Carry gun to go to Internet Cafe?! How many years, and days, he was carrying gun everywhere.. ? (75-18)*365=20,805 days ?
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If object is in the same frame of reference as other object, it's velocity vector is matching velocity vector of other object, therefor Lorentz factor [math]\gamma=\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}[/math] with same v, are the same value. And basically be both equal 1. Analyze situation for Lorentz factor 1.0 at the beginning, then in one object it's going to some higher value (because it's accelerating), and then after some time, it's going back to initial 1.0 value (because it's decelerating). While the other object, reference Earth for example, it's all the time 1.0.
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Internet from Satellite has very large delay. Find at what altitude is some satellite, divide by speed of light, multiply by 2. It's the smallest delay you could have. https://en.wikipedia.org/wiki/Geostationary_orbit "Geostationary orbit is a circular orbit 35,786 kilometres (22,236 mi) above the Earth's equator" 35786 km * 2 / 299792.458 km/s = ~0.239 s If you would send data to satellite, it would transmit to server, server prepare reply, send to satellite, it would transmit to your device, you would have data back after ~0.5 s minimum.
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limit to positive infinity of x minus x
Sensei replied to babipsylon's topic in Analysis and Calculus
Isn't x-x equal to 0? And lim(0) you're interested to calculate.. ? Do you meant? [math]\lim_{x \to +\infty}f(x)=x-x[/math] -
Do a search engine have access to all web servers?
Sensei replied to Alphaplus's topic in Computer Science
No. Search engine downloads pages only that are publicly available from other websites by links, or available on the list of pages revealed by owner of website. Owner can tell Google search engine bot, that some links should not be downloaded and analyzed. If page is every time generated from scratch, and contains completely different content, such page should not be analyzed by search engine bot. Words present in such page, will be not found, the next time user or bot is visiting it. Searching engine bot does not have any special privileges, like admin or hacker could get, to website server or pages. It has the same read-only access like any normal user client web browser. -
Computer analyze data which arrives to sensors. If sensors (f.e. Pitot tube) receive wrong data https://en.wikipedia.org/wiki/Pitot_tube which happened couple times, when f.e. common wasp made nest inside of tube, (after couple days delays of flight in tropics) it started malfunctioning, and after start of airplane, gave wrong data, which autopilot used, and airplanes crashed, as soon as autopilot was turned on. Similar situation happened on Iceland, but instead of nest of wasp, Pitot tube literally froze. Losing stabilizer, disallows fly by human pilot, but computer could handle such special case, at least to land safely (if everything else is fine).. Some pilots tried to keep airplane flying after losing of stabilizer, but it required increase and decrease of power of engine, in right moments. Over and over again, thousands of times. They managed to keep it flying for hours, but could not made it land.. Computer could do it.
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If you love country over what I said first, you're nothing but nationalist... In XX century, middle world wars, fuhrer was telling his boys to kill their beloved dogs, after years of growing up, taking care of them from young child, etc. and these boys (called SS, nazi, gestapo, etc), killed their dog "friends", because they got "order".. That was for teach them to not be used to nobody. If you love your country more than you love your family you will shoot you wife and kids on order of fuhrer?
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They are trained to the most common events, but people that fly worldwide from continent to continent, MUST, be trained to land on the water, SAFELY. As a common procedure. It's not common procedure to land on the water, AFAIK. Water landing that ended up safely can be counted on fingers. That's because pilots have no bloody idea how to behave in such situations. They have no idea how to slowly decelerate speed of aircraft. And what to do next. If they would be trained to land on water, there would be no accidents while hitting water, or afraid of hitting water.. After losing complete control over machine, right, like while ripping off entire Stabilizer at the end. That's critical damage. For this event there would be needed specialized computer program, which would keep airplane flying.
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Love Universe, love humans, love your family.. then you can love your nation.. Not reverse..
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Hello! Michelle Obama for president? I don't see her reading text from prompter.. Regardless she do it, awesome speech. (except "it's the greatest country in the world" etc) Best Regards!
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Pilots should be trained how to land on the water, or on the ground, not exactly in airport..
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As I said it depends WHAT is simulated. If every single particle is simulated, there must be storage to keep them all in memory. Normal programs allocate memory when they need them, and release them when not needed anymore. It leads to fragmentation of memory https://en.wikipedia.org/wiki/Fragmentation_(computing) (you can have 1 GB of memory, but continuous block of memory is f.e. 1 MB, so trying to allocate anything larger than 1 MB will fail, even though 1000x of free memory is available). or to out of memory situations https://en.wikipedia.org/wiki/Out_of_memory In modern times (after invention of MMU), virtual memory is used, if physical memory is gone https://en.wikipedia.org/wiki/Virtual_memory This memory can be extended during running of computer, by plugging more disk (USB).. One could press pause, and wait for disk to arrive, and install. It's not problem when program has been programmed to support such extension and pausing. OTOH, you have 1 gamma photon >1.022 MeV on input prior pair production, after pair production, there are two electron and positron particles to simulate. Increased quantity of particles to bother. Situation is even more "funny" if you try to analyze proton-antiproton annihilation.. Up to 13 (unstable) mesons can be made from this reaction, and each of meson could decay to even more particles (13*2 = 26, 13*3=39) From 2 input to ~40 output? Good that they decay so quickly and annihilate... I would say, quantity of rules (physical laws?) is very small. Very very small. It's code (program) of simulator. It's quantity of particles-quantum objects that's tremendously high. If simulator has to simulate behavior of every single one. (One can imagine plentiful optimization techniques: f.e. instead of processing every single particle independently, group them by velocity vector, if it changes particle goes to different group) Observable universe mass is 10^53 kg https://en.wikipedia.org/wiki/Observable_universe with mass of single proton ~1.66*10^-27 kg https://en.wikipedia.org/wiki/Proton It gives 6.022141*10^79 protons quantity. After fusion simulator don't have to bother about two particles, but just 1 fused nucleus.
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Amnesty International about situation in Turkey http://www.dailymail.co.uk/news/article-3705904/Turkey-coup-plotters-tortured-held-stress-positions-denied-food-water-medicine-says-Amnesty-International.html erdogan committed war crimes and should be arrested ASAP, as he lands anywhere outside Turkey, accused to ordering torturing, beating, raping, etc. arrested oppositionists. His immunity is void from now. So the same members of government and PM.
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In the all my computers, I don't have left side case panel... If you will start hearing weird noise from power supply fan, disconnect computer, dismount power supply, replace its fan. The last time it cost me 17% ($5) of what new power supply cost. Power supply failure is the most common AFAIK thing that is destroyed, because its fan is stopping working, causing it to overheat, and failure of power supply could further damage computer board or other resources connected to it (outside of tolerance voltage for short period of time). If you're electronic engineer, how about putting inside power supply near fan microphone, and then wire to computer USB, and write little application which will be sampling and analyzing sound, compare with how to should sound, and detect anomalies in it and warn you that it's not working properly. It could be fun little project.
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That depends on what exactly is simulated. In games, engine doesn't render entire world around players, where nobody look. Just what player see at the moment is processed and rendered. After rotating head, moving body to other place, it's gone, not processed. Technique f.e. back-face culling https://en.wikipedia.org/wiki/Back-face_culling saves 50% of CPU/GPU time straight away even from what is directly in front of head of player. To have very large landscape game engine splits them to blocks. Say we have 100x100 blocks. 1 block is what player can see by naked eye. If we have f.e. 1 million polygons per block. All blocks have 10 bln polygons. But player can see just 1 mln where he/she is at the moment. 10,000 speed up. Everything to limit needed calculations. Things like fusion in star, does not need to be simulated to every particle, as nobody will observe these reactions with such detail.
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It's exactly what I said many years ago: http://www.scienceforums.net/topic/86677-properties-of-photons-split-from-looking-in-telescope-to-distant-star/#entry839195