Discussion Definition and 284 Threads

Conversation is interactive communication between two or more people. The development of conversational skills and etiquette is an important part of socialization. The development of conversational skills in a new language is a frequent focus of language teaching and learning. Conversation analysis is a branch of sociology which studies the structure and organization of human interaction, with a more specific focus on conversational interaction.

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  1. A

    Would it be offtopic to make a thread to discuss a preprint?

    Would it be offtopic to create a thread to invite people to discuss a preprint on Arxiv?
  2. kittyfish

    Music Does anyone here like Will Wood / Will Wood and the Tapeworms?

    I need to find more fans of them and would love to discuss their albums!!!! I really love ICIMI and it's most definitely my favorite out of all of them. Um, It's Kind of a Lot has such a chokehold on me and it's the most relatable song ever. I also love Mitski, Msi (not them, just the music), a...
  3. emac-917

    How Can We Foster Engaging Discussions Together?

    Hello everyone, Looking forward to some interesting discussions and to learning from all of you!
  4. V

    Which forum to post personal theories for discussion

    Hi My name is Virendra Singh Rawat, I am 63 years old male, staying at Indore, India. I did my B.Tech in Metullurgy from IIT Kanpur, India in 1985. I have no formal qualification or training in any dedicated field. I am fascinated by sky and love to see the dance of heavenly bodies. For 20 years...
  5. G

    I I want a good reference to a discussion of the meaning of "the speed of light is constant"

    I am interested in making an observation that involves the speed of light. It is widely stated that the speed of light is constant, but without saying what that means. I need to be precise, and would like a reference to an acknowledgement of the problem. When people talk about the speed of...
  6. H

    What is the meaning of 'Hapless'?

    I always thought it meant "incompetent," but the dictionary says "unlucky." Huh. I now say that hapless is used as a euphemism for incompetence.
  7. M

    Mazen Dh. Mechanical engineer in infrastructure field

    Hope to participate in discussions and find answers about certain topics like anti water hammer design.
  8. Priyo137

    Seeking a platform to discuss physics

    As a physics enthusiast high-school student, I often run into troubles engaging with physics problems. In PF, I am going to seek a place for physics discussions. Thanks.
  9. J

    Are you a physics enthusiast? Join our forum for engaging discussions!

    I am a retired associate professor from an engineering college. I am a fan of physics. I have published many papers in scientific journals and mathematical journals. I am very happy to join this forum.
  10. S

    Is Wikipedia considered to be an appropriate source for discussion?

    I was just reading a thread which cited a Wikipedia article; I had thought that Wikipedia is to be considered as unreliable as the Public Broadcasting System (i.e., that has programs like NOVA, etc.), and therefore not appropriate since it is "pop science".
  11. haushofer

    I Does Superfluid Dark Matter provide a successful explanation for MOND?

    I was glancing through https://arxiv.org/abs/1605.07458 I don't fully get why scale invariance kicks in below a certain acceleration. Is this because the centripetal force becomes constant? I do see that Newton's second law with the centripetal force included is scale invariant. This symmetry...
  12. hagopbul

    Seeking Financial Benefit from Scientific Innovation: A Discussion

    Hello All : hope all are fine and well : during my scientific reading i may found a way to enhance the efficiency of some sort of simple engines , now i am working on a prototype which should be ready in few weeks for testing , the question is what next ? i am interested in solid state...
  13. PCNerdz

    B Can Push Travel Faster Than Light?

    Been thinking about this since I was 12. Suppose you had a 1 lightyear long pole, and on the other end was a button 1 inch away that activates a light. The light is powerful enough for you to see it 1 lightyear away. You push the pole 1 inch forward. How long does it take for the light to reach...
  14. F

    B Quantum entanglement and energy conservation

    As my current studies have proven conservation of energy is a universal law. How is it possible for two entangled particles to be equally or similarly affected when a force or energy is applied to a single member of the entangled pair? The production of such a pair would be invaluable to...
  15. A

    I QM and mental states,sure this isn’t philosophical discussion

    Various people like VN,Wigner thinks QM links to mental states,we know that. People introduced decoherence to kick consciousness out of the realm,as we widely accept.But even Zurek himself admits that there is a fundamental problem of why we only perceive one state and that solving the problem...
  16. DennisN

    Dune (2021) movie discussion (incl. spoilers)

    This is a thread for discussing the SF movie Dune (2021). Please post your opinions and reviews of the movie here, which may contain spoilers. There will be spoilers in this thread so please don't read it if you haven't seen the movie and don't like it spoiled! My short review: I really liked...
  17. ergospherical

    A Rindler Horizon Subtleties: Advanced Discussion

    [Mentors' note: thread spun off from https://www.physicsforums.com/threads/equivalence-principle-and-rindler-horizons.1007879/] [Disclaimer] Definitely not B Level, but possibly of interest: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.084029 discusses the Rindler horizons of an...
  18. D

    I Discussion about quantum mechanics and spacetime

    Robert Lawrence Kuhn: It seems that special relativity suggests time is like gravity and electromagnetism, not built into the absolute fabric of reality like logic and causation. David J Gross: Yes, time is dynamical. The phenomena are dynamical and are labeled by what we call time. Including...
  19. A

    Is Nuclear Energy Beneficial for the Future?

    I am a student at high school who just finished a paper about nuclear energy and I really learned a lot from it. I found the topic interesting and really enjoyed learning about it. I now am searching out more people who know about it and as much information as I can fins while having good...
  20. A

    I Is Heart Rate Invariant in Different States of Motion?

    just something i think about, maybe it difficult to answer. i know, from study, that any observer moving along his world-line - in any state of motion - will not himself notice any difference to the rate which time passes for him. example: his heart-rate will feel normal (well, so long as he...
  21. Monsterboy

    Building a discussion forum like PF

    I want to work on a personal project, a web application similar to PhysicsForums just to understand how everything works. I have some basic questions. 1. What kind of database is ideal for a discussion forum like this ? SQL or NoSQL ? 2. Which frontend and backend technologies are used to...
  22. jk22

    Is Education Merely Imposing Professors' Beliefs on Learners?

    At the base isn't education just imposing prof's beliefs and way of acting to learners ? So it lasts only if learners copy, but everyone knows that the system is kidding and contradictory, so isn't education fragile ? That's why the profs control and eventually punish discrepancies between what...
  23. Algr

    Would a worldwide quarantine help? --moved to general discussion

    Summary:: Covid 19: How effective would a two week worldwide lockdown be? How effective would a two week worldwide lockdown be against Covid 19? In March when the news first hit, the US went swiftly into a hard lockdown. But things have mostly let up since then with mostly just masks, and...
  24. Epsilon Eridani

    Hypothetical discussion on the effect of magnetic fields on planets

    Ok, so I have long been fascinated with magnetic fields and their mysterious nature. I've been wondering what would happen when the magnetic field of Earth gets bent/disturbed/rippled by some extraneous force. I am aware the extent of effects that magnetic fields have on a planet is great, but I...
  25. S

    A Exploring Bragg/von Lau Scattering: A Discussion of X-Ray Experiments

    Overview of thread: 1. Quick derivation of bragg scattering 2. Discussion of modern xray experiments as they relate to bragg/fraunhofer 3. Summary of points. Bragg/von Lau Scattering: (I will be following Ashcroft if you want to sing along, pg 98-99) Imagine you have light incident on some...
  26. bryanso

    Understanding Feynman's Discussion of the Parallel Axis Theorem

    https://www.feynmanlectures.caltech.edu/I_19.html "Suppose we have an object, and we want to find its moment of inertia around some axis. That means we want the inertia needed to carry it by rotation about that axis. Now if we support the object on pivots at the center of mass, so that the...
  27. Adesh

    I Why integrals took 2000 years to come up in a rigorous manner?

    Archimedes Riemann integral is one of the most elegant achievements in mathematics, I have a great admiration for it. Mr. Patrick Fitzpatrick commented on it as Archimedes first devised and implemented the strategy to compute the area of nonpolygonal geometric objects by constructing outer...
  28. A

    What are the key features to consider when sketching a curve?

    a.) 4 critical values b.) there are no points of inflection c.) 2 local maxes and mins d.)
  29. Adesh

    Isn’t “kicked out” a derogatory term?

    It is expected from civilised folks to use respectful terms for others. I personally find “kicked out” a very derogatory and insulting remark :-) . How do you see that? (Especially if it is from someone who is classified as civil and meant for someone who is also civil).
  30. Adesh

    Our great mentor Berkeman has changed his avatar

    Hello everyone! I was surprised to find Mr. Mike Berke has changed his avatar. Earlier there used to be a very high CC motorbike in his avatar and that caused me to believe that our mod used to drive that bike (at high speed, like some racer) but now seeing his avatar I found he is a very calm...
  31. S

    Free easy to use discussion forum for U3A group?

    Hi, I am the leader of a University of the Third Age discussion group which has just been suspended due to the ongoing Coronavirus situation. I am hoping to be able to continue our discussions online in some way. All group members are tech savvy enough to use email, and search the internet...
  32. Vanadium 50

    I Discussion of free neutron lifetime

    I'm splitting this off the proton radius thread. The first measurements of the neutron lifetime worked as follows: you get a nuclear reactor as a neutron source and open a port in it to get a beam of neutrons. You count the number of neutrons in the beam and the number of protons (from neutron...
  33. Negatratoron

    Discussion Thread on the "Massless Charge" Perpetual Motion Machine

    Imagine a massless (or very light-weight) charge that is glued to a rod undergoing sinusoidal motion along an axis. The acceleration of this charge produces electromagnetic waves, which can be harvested for energy, and this energy can be used to power the continued sinusoidal motion as well as...
  34. hamin4

    Ethical Discussion -- Engineering used to create innovation versus destruction

    I have always wondered about the ethical aspect of engineering in general. Considering engineers of all kind are responsible for the creation of some of the worlds most useful and innovative technology and some of the most destructive, do engineers feel that they may hold responsibility in what...
  35. user366312

    What Are Static, Dynamic, Transient, and Persistent Proxies?

    What I understand is, I have written something like this myself. What is a Static Proxy and a Dynamic Proxy then? Also, What is a Transient Proxy and a Persistent Proxy?
  36. Greg Bernhardt

    News Ethiopian Airlines 737 crash discussion

    https://www.cnn.com/2019/03/10/africa/ethiopia-airline-crash-nairobi-intl/index.html There is now a lot of speculation about whether something is seriously wrong with the 737 MAX. https://www.cnn.com/2019/03/10/africa/ethiopian-airlines-crash-boeing-max-8-intl/index.html
  37. Z

    "The theoritical minimum" modern equivalent for solid state?

    Hi, for those who don't know, Landau (Lev Davidovitch Landau) had a famous exam called "The theoretical minimum". That exam had to be passed by any future grad-student of his. That test was extremely extensive and difficult, and the student was supposed to be knowledgeable about many fields of...
  38. V

    Discussion about Altering Automotive Electricity Management

    I'd like to start a thread of thoughts and opinions of a topic that I am considering spending time and money on. Unfortunately, I do not have a very broad knowledge of the engineering intricacies of the topic. I'm really curious if there has been a proposal or workings of a vehicle that uses an...
  39. C

    I Why limited discussion of only looking at history

    When you look at a bird in a tree with binoculars, that is not the bird as it exists at the moment but the bird that was there before the light traveled to the scope, which for practical purposes is the bird. You can shoot the bird of before, and it will fall to the ground. However, when you...
  40. YoungPhysicist

    Quicksilver's true ability discussion

    I just finished watching Xmen:Apocalypse and have several ideas about Peter Maximoff i.e,quicksliver. Minor spoilers ahead:(I will try my best at saying the minimum amount of plot itself, only when nessasary:smile:) First to declaim:The Xmen series are basicly around a group of people that can...
  41. F

    I A discussion on "officially called a planet"

    Forking a subject that was in risk of hi-jacking anther thread here. If the hypothetical TNO "planet 9" is detected , it would not fit the IAU's current criteria of being a planet. What would it be ? For the sake of discussion let's assume 10 Me and estimated likely distance and orbital...
  42. M

    Tips & Tricks for web searches focusing on discussion forum sites

    How can we make a search just focusing on forum sites? Is there any discussion search options in search engines? https://www.makeuseof.com/tag/3-forum-search-engines-to-search-40-000-message-boards/...
  43. benorin

    B The Drunkard's Walk: A Discussion of the Text

    This thread is for us to discuss the text The Drunkard's Walk: How Randomness Rules Our Lives by Leonard Mlodinow, and by that I mean for me to ask questions of you, those of you who will suffer me, my experts in probability, the PhysicsForums readers, on things I'm interested in from the text...
  44. S

    Millennial households in poverty -- Re-launched Discussion

    Hi everyone. As you may know, I had previously started a discussion regarding poverty rates among Millennial households in the US (see the link here for those who may not be familiar). https://www.physicsforums.com/threads/more-millennial-households-in-the-us-are-in-poverty.936087/ After...
  45. DennisN

    What happened at Heathrow airport on Star Wars Day?

    WARNING! This thread contains spoilers for Star Wars: The Last Jedi. If you have not yet seen the movie, we strongly encourage you to turn around and return once you have. Please use this thread for discussions about The Last Jedi, including spoilers. :smile: I have not seen the movie yet, so I...
  46. L

    B Is 'Oumuamua an Alien Spaceship or Just a Cosmic Coincidence?

    Given the evidence available as of today, is it reasonable to believe there is even a miniscule chance that the Oumuamua asteroid was built by aliens? Or is this just sensationalist journalism?
  47. R

    What is the expected value of the area of a triangle formed from a broken stick?

    Here's a math question I've been thinking about lately. We have a stick of length one which is broken in one spot (with that spot chosen randomly and uniformly). Of the two broken pieces we take the one on the right and break it into two pieces in the same manner as before. With our three...
  48. ISamson

    Connecting With Other Arduino Lovers - Join the Discussion!

    Hello, May I ask, are there any Arduino lovers here? I would like to know, because I have just started with Arduino and wish to know who I could ask if I have a problem or interesting project idea... Thank you. P.S. I have the Arduino starter kit.
  49. M

    How does the use of a reflector affect the performance of a receive antenna?

    Do receivers only receive signals or they emit emf?
  50. T

    I Is Time an Illusion? Exploring the Block Universe Theory

    Einstein said, "The distinction between past, present and future is only an illusion, even if a stubborn one." That's my problem--that illusion is so vivid and stubborn. Paul Davies said in his book "About Time": There is only one rational conclusion to draw from the relative nature of...
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