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About pavelcherepan

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  • Birthday 08/09/1984

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  • Favorite Area of Science
    Geology, Physics

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  1. Sum of factorials

    I'm not great at maths, but it seems like you can express sum of factorials as an integral and then I guess, you can just go with sum rule in integration. Not sure what you do afterwards, though. Good luck anyway.
  2. Why only human can get smallpox?

    Nit-picking, but this is not correct.
  3. Vladimir Putin wins Russian election with about 77% of vote

    But that's not what ultimately dismissed him from running for president.
  4. Vladimir Putin wins Russian election with about 77% of vote

    Well, I'm reading and seeing things like: On the other hand: Forbes is a very credible source for wealth figures so if they can't verify assets, this argument is not very solid. I don't doubt that in ~20 years in various high offices Putin did make a nice chunk of money, but $200 billion? Such wealth would be really hard to hide.
  5. Vladimir Putin wins Russian election with about 77% of vote

    Well, maybe not an uprising, but it would be a political suicide. If any president gave Crimea back to Ukraine, they most certainly wouldn't be re-elected. Most Russians consider and have always considered Crimea to be an inherent part of Russia, it would be really hard to convince them otherwise. Would sanctions be lifted? Possibly. But how long would that take? US lifted cold-war era trade restriction (Jackson-Vanek amendment) over twenty years after dissolution of USSR. No reason to assume that largely anti-Russia senate would go and lift sanctions immediately, but people would want immediate positive outcomes if Crimea was ceased. It's really hard to prove that, unless you want to use a tabloid such as Daily Mail as a reputable source.
  6. Vladimir Putin wins Russian election with about 77% of vote

    It already happened... Had Navalny withdrawn from Crimea, there might be an uprising. Overall, people are extremely supportive of taking back Crimea, or whatever else you wish to call it. I said "technically". By constitution, Justice is an independent branch of Russian government. False. He's been arrested and tried for business fraud.
  7. Vladimir Putin wins Russian election with about 77% of vote

    There's a difference between "denying right to vote in a free and fair election" and having a free and fair election that you're certain to win. Technically speaking, it was not Putin who denied Navalny a right to go for president, but Justice system and constitution. Oh, no worries, I have Russian/Ukrainian/Polish roots. Well, historically, Russians do love a strong hand, but more than that after decades of turmoil, Russians love stability. Had someone like Navalny come to power, there would be drastic changes and no one is certain it would be for the better. Not sure which country you're from but few presidents/PMs of major countries don't have blood on their hands.
  8. Vladimir Putin wins Russian election with about 77% of vote

    Well, that last quote is a bit uncalled for. I'm Russian and I was very certain that the result would be as we saw. I didn't vote myself, I was in the middle of nowhere and couldn't get to Melbourne in time to cast my vote, but for the lack of better options, and "against all" option for that matter, I guess I'd vote for Putin as well. Thing is that Putin didn't really have any opponents worthy of mention. I know a lot of people in Russia, who support Navalny and would vote for him, but he was not allowed to run for president. This is one of Putin's strengths, he's very good at getting rid of anyone who might challenge his authority and as a result has no need to forge election results, even though, if need be, he could. There are some other politicians in Russia who are held in very high regard in public opinion and could be worthy contenders, namely the Foreign Minister Sergey Lavrov and the current Defense Minister Sergey Shoigu. Both of Sergeys are very popular; Lavrov is held in high esteem for his intelligence and pro-Russia political views, even if not as nationalist as Putin is. Shoigu was for a long time Emergency Services minister and was highly popular in this role and in the current role also gets a lot of pro points from Russia's involvement in Syria among others. Thing is, though, the reason these two are successful government officials is that they know their place. They will not challenge their boss, even though they could put up a good fight. I would certainly vote for Lavrov, had he gone for president. Maybe they will go for the next presidency, when Putin won't be able to enter the lists. We'' have to wait and see... six more years. Can't remember who said it, but the quote goes something like - "Here in US we had many bad presidents, but when it happened we sort of just waited for them to not be our president any more". In essence, that's the state of things in Russia nowadays. Mind you, Putin is not the worst it could be, we could have another drunk for a president.
  9. As Area54 pointed, science theories usually look into a small subset of data, that's why we have a very old physics joke about "spherical chickens in vacuum". Also for many complex systems (or even relatively simple like 3-body problem) there are no analytical solutions, but only numerical models, and the more conditions you take to describe the system, the higher the computing power required to model such system, which grows exponentially with each new condition. So I'd say it's not that we don't have enough data, it's finding a way to model ecosystems with all the data we currently have available. Hopefully, developments in quantum computing will help.
  10. Vegetarian or not for environment

    ...which in turn is easily countered by saying that removal of meat will require turning large if not all of that pasture land to grow monocultures. Also, the largest amount of pasture land are used by "free range" cattle, sheep, etc., which is much closer to the "nature" than, say, a corn field. The biggest change these areas experience is removal of most of trees to improve grass growth with usually no herbicides/pesticides and other chemicals being used on regular basis. On the other hand, animals being produced in confined enclosure, such as most pork, take very little space for a very large calorific output and very efficient use of space. It seems like the best course of action would be to make "free range" meat produce illegal.
  11. The Logical solution to the Twin Paradox Explained comprehensively

    I'm confused about this part the most. If the transponder on the Earth is pinging at 1 Hz, the twin on the ship in his own FoR should experience 1 ping per second, although at a higher frequency than the source due to blue shift. Why would the ship twin actually experience time as going 3x faster?
  12. Is presidency term adequate?

    I would agree if results of elections were in any way related to the policies a candidate is proposing, but as we have clearly seen in last US elections, policy plays very little role in the final result. It's usually just populist promises by accomplished demagogues which in most cases never get fulfilled. Say we have a very capable leader, who is looking at a long-term scenario, which includes making some sacrifices in short term. This leader essentially has 2.5 years to set these plans in motion, because come election time they can get another Trump as main opponent with little policy ideas, but great skills of raising popular support. As a result all the good ideas can be abandoned. Wouldn't it be better, for example, for the president/PM to be elected for, say, 8 years and mid-way through the term, people would have a vote of confidence, with no actual opposition. If president loses the vote, proper election starts.
  13. Is presidency term adequate?

    I was just wondering what you guys think about the duration of presidency or prime minister term. Is it adequate? Say, with 4-year term in US and many other countries, when a new leader comes to the office it takes time to get a grasp on things and form the government, say it takes 6 months. Then at 3-year mark the next presidency campaign kicks off and now they are distracted from actually trying to do their thing and instead have to appease the public, travel all around the country and defend themselves against the attack of political opponents (or go on attack of their own). That leaves something like 2.5 years out of 4 to actually try and govern the country and implement whatever plans they had before entering the office. Seems like a lot of time being wasted on other things.
  14. White collar work Vs Blue collar work

    I think you and I have different understanding of what a blue collar worker is. You seem to imply that it's mostly some sort of unskilled labor while in fact a lot of blue collar professions require just as expensive and long education as a white collar jobs. Take mechanical/electrical/mining engineering, geology (that's me), processing engineering and whole bunch of other highly skilled professions that are considered "blue collar".
  15. White collar work Vs Blue collar work

    You are speaking like blue collar work is something bad. It isn't.