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Sensei

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Everything posted by Sensei

  1. It's high time to stop thinking of humans as something special. Animals make and use tools. Animals build houses. Birds create quite complex structures. Even insects. Try "Forgot your password?" https://scienceforums.net/lostpassword/ Maybe you just logged in through Google/Facebook/X?
  2. The short answer is that everything is physics and chemistry. Outside world ("the environment" you mention) influences blood contents and cell contents, different neurotransmitters are created and used, different hormones are used, the chemical balance changes, etc. etc. All put together has some bearing on how DNA is interpreted during cell division, and which genes are activated and which are not. From the net: "Cortisol, a stress hormone, can affect gene expression by modifying DNA methylation or by acting on glucocorticoid receptors, which can lead to changes in protein production and cellular processes. Gene recession, or gene silencing, can result from these changes, such as through increased DNA methylation, which impairs gene access and function" https://en.wikipedia.org/wiki/Cortisol "expression" and 'gene expression" is several times mentioned even on the Wikipedia article. Search the net ("the name of hormone + expression") for other hormones and similar articles. "Hormones, particularly steroid hormones like estrogen, progesterone, cortisol, and testosterone, can directly influence gene expression. These hormones, or others like thyroid hormone, retinoic acid, and calcitriol, often act by binding to intracellular receptors that then act as transcription factors, regulating which genes are turned on or off. " ps. Can't you write one coherent post? Try using ChatGPT to rewrite your questions. ps2. I don't believe they didn't write about it in the books. You didn't read carefully. It's in the first paragraph of the articles on Wikipedia!
  3. The immune system is good enough to allow the spread of DNA to the next generation i.e. having children. Modern people live a lot longer than your ancient predecessors. In the past, people did not live at all to the age at which people live now, and serious DNA damage begins in them leading to the formation of cancer cells. Cancer is a modern disease. Damage can be caused by pollution of air, water, and consequently food, can be the result of an unhealthy lifestyle (carcinogenic foods and drugs), exposure to carcinogenic substances during life (firefighter, coal miner, steel worker, welder, oilman, construction worker, etc.). The incidence of cancer increases with age, i.e. a person has passed on his DNA to his offspring and has not participated in the process of natural selection. The median age of a cancer diagnosis is 67 years. Early unhealthy life, with cigarettes and drugs, in unhealthy environment, could damage DNA already. Diagnosis can come decades later.
  4. If you need a program, you search the web and download it. The next time you have a need, don't do it. Write it yourself. Start with something simple. E.g. in Linux you need cat, ls, mkdir, rm, mv, etc. etc. Write them yourself. Equal copies 1:1 in C/C++ from scratch. When they are ready, start adding the new functionality they lack. During development, you should find inspiration for what is missing. Another idea, buy a VPS, and domain, if you don't already have one. Learn how to use SSH, how to install Apache HTTP server, DNS server, VNC server, POP3/IMAP servers, FTP servers, etc. etc. etc. OVH has the cheapest VPS for ~$50 per year.
  5. What for? It's just that kind of hype to confuse laymen who don't understand anything. Western governments have already put in place regulations allowing themselves to circumvent passwords on any social network at any time, without knowing the password or even permission from the owners of those social networks. On each of them they force people to use 2FA. With 2FA with phone as 2nd device, you don't need to know any password (and hack encrypted transmission) to login into somebody system..
  6. Has Google gone bankrupt or what? https://www.google.com/search?q=science+experiments+rats+stimulation+of+brain+starve e.g. https://www.sciencedirect.com/science/article/abs/pii/0023969071900518 "Self-starvation and rewarding brain stimulation: Effects of chlorpromazine and pentobarbital Abstract Given the choice between rewarding brain stimulation and food, albino rats with electrodes placed in or near the medial aspect of the medial forebrain bundle (M-MFB) ignored food and self-stimulated. Subjects with electrodes placed in the lateral aspect of MFB (L-MFB) also self-stimulated, but did not ignore food. In M-MFB animals pretreated with chlorpromazine (CPZ, 2 mg/kg, ip), self-stimulation was reduced and self-starvation was attenuated. When the same subjects were pretreated with pentobarbital (PENT, 8 mg/kg, ip), self-stimulation was not reduced, but self-starvation was attenuated." Wikipedia https://en.wikipedia.org/wiki/Brain_stimulation_reward
  7. Some animals, when their brains are stimulated by appropriate chemicals or appropriate electrical impulses, can even die of starvation. They stop looking for food, stop all their normal activities, and just live in constant euphoria until they die. Of course, scientists are helping them in this experiment..
  8. There are brass alloys that contain up to 5% tin: https://en.wikipedia.org/wiki/Brass#Brass_alloys Copper reacts with concentrated sulfuric acid: https://www.google.com/search?q=concentrated+sulphuric+acid+copper+reaction
  9. It is possible to pretend in spirit and in front of yourself a liberal, and actually be a conservative.. ;) Sexual activity does not have to result in the begetting of offspring. Unsatisfying sex, is a good indicator that such a relationship has no future. Hence the search for a new partner. I think it is much easier to get satisfying classical sex with a larger partner, because they are simply tighter. I'm a big fan of first date sex. If the sex is successful, that's when you can start talking about something else and start forming a real relationship. Months of dating, or even engagement, and then a first wedding night that turns out to be a “nightmare” is a recipe for wasting one's life. For becoming angry, bitter, prone to cheating, etc. Virginity can be lost only once. No amount of sewing, etc. will change that ;) You cannot expect/demand virginity from your partner if you are not one yourself.
  10. Sensei replied to studiot's topic in Engineering
    People don't learn from their own or others' mistakes. In the UK, all natural forests have been cut down! This post-1920 peak is just a consequence of using more concrete, bricks and stone instead of wood: https://en.wikipedia.org/wiki/Forestry_in_the_United_Kingdom Doing a simple interpolation in 1920 on this graph, it is clear that if it were not for the cessation of timber use, 100% of the UK's forests would have been cleared by 2000. Now you jump in and want to reverse this trend. Good for someone with the mentality of a woodsman and lumberjack. If you don't cut down xxx trees it won't make money. If a butcher doesn't kill yyy animals he won't make money. If a fisherman doesn't catch zzz fish he won't make money, etc. etc. etc. All on a piecework basis without thought. I have no idea what IT has to do with it. There are companies that melt plastic from PET bottles and create filament from it for construction. The machine they show was 3D printed from garbage (material cost zero):
  11. True. I love Labradors. They are so lovely.
  12. ..it seems to me that the Old Testament is filled with just the opposite examples. Starting with Isaac. https://en.wikipedia.org/wiki/Binding_of_Isaac Keeping the commandments also hardly counts as what you say.. Being (relatively) happy is the result of everyone doing the right thing and not committing sins, and other wickedness. In other words, do not do unto another what is not pleasing to you. Unless you are some kind of sado-maso etc. ;) (The Jews of >= 3,000 years ago did not foresee that someone could take pleasure in such things)
  13. I was called to the board like a first-grader. Don't pretend someone else against yourself.. If you are evil, then be evil, and if you are good then be good. If you have the strength to overcome the evil within you, then you can become good.. Being evil is easy, sometimes it keeps you alive, but usually not very pleasant, because hatred eats you up from the inside and destroys you. Being good can also cost you your life, if evil wins, and kills you. The superposition between good and evil in quantum physics is not yet a solved puzzle.. ;) ..or the sources were misrepresented by the winners.. ;) I can easily refute this:
  14. What can be done about this paradox? We will have to reboot the entire Universe! Are you okay with that? ;) Meanwhile, if something is at rest, something is moving, so we can find the reference system in which both objects are moving. This is called the FoR of the center of mass or the FoR of the center of momentum. https://en.wikipedia.org/wiki/Center-of-momentum_frame How about a little physics and/or science.. ? i.e. CoM FoR.
  15. Just like Universe but currently smaller.. ;)
  16. The correct one would be Mister or Sir @pzkpfw, because Asians terms i.e. brother, sister, aunt, uncle, grandma, grandpa, etc. do not work in Europe and an unknown person should be addressed as “Sir", "Madame”, “Mister” or "Lady" etc. if you want to be extremely gently. Referring to someone as “brother” can actually be considered an insult, because you don't really know each other. (In the company where I am often, you see people in their 70s who say “sir” to a salesman who is about 20 years old. In Asia I would expect something like “grandson give me this and this” ;) In my country, everyone we don't know is addressed as “Mr.” or “Mrs.”. (Most people have titles of nobility that they don't brag about..) Otherwise, everything else will be rude. If someone introduces himself by name and says, “Let's call each other ‘you,’” (you can propose it yourself, and wait for confirmation from the other side) then you can switch to a more relaxed form. But the form “brother” is heard only when someone is completely drunk at 3 am.. On a forum I would expect to speak by nickname. ps. From an Asian perspective you should call them “grandpa”... ;) And me you should call "superadmin eternal grandpa".. ;)
  17. Every time you turn on, for example, a Minecraft server, a unique world/universe is created in which artificial intelligences live. Now you have a situation where these AIs are starting to ask who created us.. ;) Even better - the artificial intelligences create their own AIs (from which they can't break away and ask everything and treat as oracle).
  18. You should start with the basics. Photoelectric effect. https://en.wikipedia.org/wiki/Photoelectric_effect Photon matter interactions: To begin with, search the web for titles appearing in the film + “Wikipedia”. One may wonder why these electrons are depicted as in the thumbnail above.(grouped together): https://en.wikipedia.org/wiki/Aufbau_principle The innermost electrons require higher energy to remove than the outermost electrons (fairly simple and obvious rule): https://en.wikipedia.org/wiki/Ionization_energy which leads us to historical knowledge about spectral lines: https://en.wikipedia.org/wiki/Spectral_line https://en.wikipedia.org/wiki/Balmer_series and https://en.wikipedia.org/wiki/Rydberg_formula If you are interested in history (i.e., a timeline of discoveries) If you need a demonstration of the quantum world with your own eyes, you need to see some kind of particle detector, such as a cloud chamber: other films: https://www.youtube.com/results?search_query=cloud+chamber If a word is incomprehensible, click the link on Wikipedia to see the description.
  19. When you quote from an external source, you should use the “Wrap in quote” option. In my opinion, this is a rarely used option. But when quoting someone from a forum, there are much better tools - because they keep the forum member's ID and date.
  20. Sensei replied to iNow's topic in Politics
    You are not cunning enough. What if the passing was the result of the visit.. A stroke, like a heart attack, can be caused by nervousness and prolonged stress. Adrenaline is released, blood vessels shrink, cholesterol plaques break off, clogging blood vessels and less oxygen reaches a certain area of the brain.
  21. I have a different value from here (but it is from 2000. Maybe current estimates are different): https://en.wikipedia.org/wiki/Carbon_cycle#Ocean "the deep ocean contains far more carbon—it is the largest pool of actively cycled carbon in the world, containing 50 times more than the atmosphere"
  22. Are you talking about "Wrap in Quote" ?
  23. Sensei replied to dimreepr's topic in The Lounge
    You scared the newbies with your profile picture.. Wasn't it www.scienceforums.net before, and now it's scienceforums.net? Such a change has a devastating effect on search engine rankings. All links that search engines have ever recorded are now redirects. robots.txt differs between URLs: https://scienceforums.net/robots.txt https://www.scienceforums.net/robots.txt Sitemap from 1st is providing to http://www.scienceforums.net/sitemap.php I'd change it to https://scienceforums.net/sitemap.php i.e. http -> https and have them on the same domain name. All the links on sitemap here: https://scienceforums.net/sitemap.php are with http instead of https and are with www.scienceforums.net so are all redirects..
  24. "The new ChatGPTs lie like crazy. Hallucinations in every second answer. The latest OpenAI artificial intelligence models for inference give false answers more often than older AIs. It's not clear why." "A few days ago, as we wrote about, OpenAI released new models for inference - including the most important o3 and o4-mini. They perform better than their predecessors in some areas - especially coding and math. Now we have found that, unfortunately, they make up answers much more often than the older OpenAI models. They hallucinate in greater explicit numbers than the company's previous reasoning models - o1, o1-mini and o3-mini - as well as traditional “non-comprehending” OpenAI models such as GPT-4o." "The response rate of new models with fake content is alarmingly high. OpenAI discovered that o3 showed hallucinations in response to as many as 33 percent of questions. This is a result achieved in a special PersonQA tool used by OpenAI.to measure the accuracy of the model's knowledge." "The 33 percent response rate with hallucinations is roughly twice the hallucination rate of OpenAI's previous reasoning models, o1 and o3-mini. These get scores of 16 percent and 14.8 percent, respectively, in the tests here. o4-mini performed even worse in the PersonQA test. In its case, hallucinations occurred in as many as 48 percent of cases." "That new inference models are more likely to lie has also been noticed by Transluce, a laboratory specializing in artificial intelligence research. Its researchers noted, for example, how o3 informed a user that it had run code on a 2021 MacBook Pro. “outside of ChatGPT,” and then copied the numbers into his answer. That's bogus, o3 can't do that." "There are also reports that links to non-existent Web pages, for example, appear in application codes generated by the new models." "No one knows why this is happening. Transluce, in an interview with TechCrunch, speculates that the increase in the number of hallucinations of the new models should be linked to the technique of teaching them through so-called reinforcement. In it, not only do their capabilities grow, but their greatest weaknesses are strengthened as well. " "So now it seems that the AI industry has entered a bit of a dead end. Last year, it focused on developing inference models after techniques to improve traditional AI models began to show declining effectiveness. Reasoning seemed to improve the model's performance on many tasks, without the need for huge calculations and the use of huge amounts of data during training. However, it now seems that reasoning models also have greater hallucination than standard models. As we now know, they are starting to get so big that they often derail the sense of using AI." (Translated by AI ;) ) All the code generated by the older ChatGPT did not work.. Almost useless for beginners, as they will have no idea where to start in order to get it to compile and work..
  25. Sensei replied to iNow's topic in Politics

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