Today I've received several messages of people distributing invites for .  The first red flag is that the only way to participate is by being invited, which smells like a pyramid scheme. If it was something legitimate, why only allow entering with an invite? Just for marketing purposes?  The second red flag is that it's a thing full of beautiful promises but has nothing concrete at all.  On the other hand:   I don't see the "scammers" getting anything at all out of this: looks like you only have to give your name and email. There's not an "entry fee" like the usual pyramid schemes. Apparently reputable people are involved (creators of PayPal)? Does this mean anything?   So what's the point? Is there any logic in this? How does this work?
I was recently invited to join InitiativeQ via a friend on Facebook. The underlying idea makes rough sense to me (as a non finance expert). However their 'hook' seems to be that early adopters will get free money later down the line when the currency launches (the earlier you adopt, the more currency you will receive). Looking at the website, there is a big button with the text Reserve $128,957 (I assume that's their idea of what the dollar value of my reservation will be if it launches).  The website's production quality suggests it is not a scam, however the language suggests strongly that it is. Is this a scam, a get rich quick scheme? Or am I being overly paranoid?
How to snap and align 2 objects Hi! I'm a beginner learner and I'd like to know how to snap these three objects. I'd like to snap the two cylinders with the different faces of the cube. The short one on the left and the highest cylinder on the top of the cube. I'd like to have the center of the cylinder aligned with the center of the cube (the base of the cylinder inscribed into the face of the cube)  I'm sorry for bad explanation I hope someone can help me  Thanks!   I add a screenshoot in which you can see what I have to do   Thanks again if someone can help me with this! How did Rita know she lost the power? In Edge of Tomorrow, Emily Blunt's character, Rita Vrataski, had the time-resetting power previously.  She details the backstory of how she gained it, and how she lost it.  However, how did she know when she lost the power?  It's only triggered when the wielder dies.  Obviously she didn't die after losing the power, so how did she know the power was gone? Just looking for the difference between   2&gt;&amp;- 2&gt;/dev/null |&amp; &amp;&gt;/dev/null &gt;/dev/null 2&gt;&amp;1   and their portability with non-Bourne shells like tcsh, mksh, etc. How can I get more of this macro photo in focus? How to add a custom icon or symbol to a flag link? I'm working on a 'sample request' implementation for a commerce site using , , sessions and a little custom code.  I'd like to add an icon or a symbol to let people know that an item they are viewing has been flagged.  I'm not sure exactly how to approach this, I can imagine perhaps adding a conditional field that displays an image or check box that is then changed by  or ajax, or perhaps something more complicated in JavaScript?  It could really be as simple as adding a checkbox that is checked or unchecked as the flag link is clicked or maybe even changing the css/html on click to be identified as marked.   Anyway, grateful for any advice here. Hide and seek game $A$ and $B$ go to the Senate to play a game of Hide-and-Seek. There are $100$ rooms in the Senate, and $B$ picks one of them and hides there till the game ends.  $A$, at the beginning of every turn, picks one room and searches in it. Since he is human and thus fallible, he only has a $60\%$ chance of finding $B$ if she is in fact hiding in the room. If he fails to find her in the room, $B$'s score increases by one, and the next turn starts, whereupon $A$ must pick another room to check (he can also check the same room again). $B$ remains in the room she initially chose.  Given that $A$ and $B$ play with perfect strategies, what is the expected value of $B$'s score at the end of the game?  I tried with $1$ room. There is only one hiding place for $B$. So the expected score of $$B = \sum_{n=1}^{\infty}0.4^{n-1}0.6(n-1)=\frac{2}{3}.$$ $GL_n(\mathbb F_q)$ has an element of order $q^n-1$ For fixed prime power $q$ show that the general linear group $GL_n(\mathbb F_q)$ of invertible matrices with entries in the finite field $\mathbb F_q$ has an element of order $q^n-1$.   I tried to show this question with showing diagonal matrix but i can't find element directly  competible with order i think i am on wrong way please give me clue ? Doing a little reading over the break (The Probabilistic Method by Alon and Spencer); can't come up with the solution for this seemingly simple (and perhaps even a little surprising?) result:     (A-S 1.6.3) Prove that for every two independent identically distributed real random variables $X$ and $Y$,   $$Pr[|X-Y| \leq 2] \leq 3 Pr[|X-Y| \leq 1].$$ There is a button in the "basic math assistant" which wraps highlighted text in chosen brackets. Is there no keyboard command for this? Hide back faces in 3D View? How do you hide back faces so that you only see faces when its normal is facing the camera? When exporting it for use in a game, the face is rendered in only the direction of its normal, so this would be useful to have something similar. Book: Nanobot apocalypse on Earth, originally used for weather control A few years ago I read an excellent sf book about nanobots that went out of control. In the book they were used for weather control, when they went amok the scientists threw in yet another bunch of nanites and so on, until Earth became uninhabitable, teeming with nanites, I remember the weather also became cold. The planet still could be visited but when they lost cloaking the nanites would attack.   Also, some humans in the book merged with nanites, they could behave benevolently but I forgot the plot too. I only remember fragments of this book, I would like to read it again in English. (loaned a long time ago from a library here in Sweden but they closed the library).   I only know that it was written by an Anglo-American contemporary SF writer, probably 30-55 y.o. Reference for statistical mechanics from information theoretic view I am interested in knowing if some one here knows book/notes for statistical mechanics from the information theoretic viewpoint.  Additional Request from user83014  "Jaynes wrote a paper called Information theory and statistical mechanics (1957). I tried to read this but found it somewhat hard to follow, and I suspect it's because it's one of the earlier works, and that a modern text might be more refined since we've had time to work it out. On the other hand, what I've read from physics textbooks don't explicitly talk about information theoretic concepts like shannon entropy.  "Is there a good modern introduction to the information theoretic view of entropy?" How do I install Skype? I shall assume that the sun is at rest, so before the half mass disappear, the orbit of earth is an ellipse. Sometimes it’s possible to use either a noun adjunct or the possessive case.     the shop door   the shop’s door   However, in certain phrases it’s not OK to do so.     the ship’s crew (the ship crew is wrong)   The questions are:   How can one find out what to use in such cases as “the shop(’s) door” when a noun adjunct option and the possessive case option are available?  How can one know which option is wrong in order to avoid the construction “ship crew”? Is there a difference in meaning between (a) the shop door (b) the shop’s door? How do I draw ovals in TikZ? How can I draw this graph in the pic via tikz. Ways to get free and legal access to research papers as a researcher I’ve discovered that website like ResearchGate offer the possibility to ask the paper editor to provide his paper for free. Many are collaborating.  Are there any other ways for researchers to obtain free access to papers? Information about (simple) mask wearing (concerning covid19) is a complete mystery to me. On several official places it is not recommended for a person without symptoms to wear a mask. For example:    (time 0:20)  or here:    However no explanation is given - which makes me wonder (and even angry). I think everybody should wear a mask because:   Many persons feel ashamed wearing it, even those with symptoms. If everybody wears it, they do not feel ashamed and wear it. As far as I know, one is (wrt covid19) contagious before developing symptoms. So if everybody wears the mask also these people do.   The two above points act as a collective protection.   Simple mask certainly will lower "getting / spreading illness" probability. Of course the "holes" (in a simple mask) are too big to prevent completely virus to enter (or get out when coughing), but it lowers probability! Even if it lowers the transmission probability by e.g. 5%, it might be a lot. As a hypothetical example: it might reduce R0 from 1.02 to 0.97 and so stop the virus spread so fast.   The videos are full of self-contradiction. In the same video    time 0:50 the lady says I should wear a mask if I am in contact with an infected person... why if it is inefficient?  Question: What are reasons for not recommending wearing a mask? About big parenthesis larger than Bigg Time limit on accepting an answer Why is there a 15 minute time limit on accepting an answer in StackOverflow?