Remove comma between two fields (instiution and series) in .bst file

I'm trying to format bibtex entries of type unpublished (for Working Papers) like those of type article. That is, institution + series shall be formatted as if it was the name of the journal.  This is my bibtex entry:  @unpublished{SomeKey,     title = {bst files are difficult},     year = {2015},     author = {Author, Unknown},     series = {Discussion Paper},     institution = {Bibtex-Institute} }   To do so, I'm tweaking the  style:  FUNCTION {unpublished} { output.bibitem   list.label.output   " \harvardyearleft " list.year * "\harvardyearright " * output.nonnull   author "author" item.check   title.field field.used =     { skip$ }     { format.title quote "title" output.check }   if$   institution emphasize output   series emphasize output   new.block   fin.entry }   which outputs  Author, U. (2015), 'bst files are difficult', Bibtex-Institute, Discussion Paper. How do I get rid of the comma between the fields institution and series?  The original function was:  FUNCTION {unpublished} { output.bibitem   list.label.output   " \harvardyearleft " list.year * "\harvardyearright " * output.nonnull   author "author" item.check   title.field field.used =     { skip$ }     { format.title "title" output.check }   if$   new.block   note "note" output.check   fin.entry   write.url }


Is there a way to evaluate,   $$ \large \cos x \cdot \cos \frac{x}{2} \cdot \cos \frac{x}{4} ... \cdot \cos \frac{x}{2^{n-1}} \tag*{(1)} $$  I asked this to one of my teachers and what he told is something like this,   Multiply and divide the last term of $(1)$  with  $\boxed{\sin \frac{x}{2^{n-1}}}$  So, $$ \large \frac{\cos \frac{x}{2^{n-1}} \cdot \sin \frac{x}{2^{n-1}}}{\sin \frac{x}{2^{n-1}}} \\ \tag*{(2)} $$ $$ \large \implies \frac{\sin (2x)}{2^n \cdot \sin \frac{x}{2^{n-1}}} \\ $$ $$ \large \implies \frac{\sin (2x)}{2^n \cdot \frac{\sin \frac{x}{2^{n-1}}}{\frac{x}{2^{n-1}}} \cdot \frac{x}{2^{n-1}}} \tag*{(3)} $$  Now, as $n \to \infty$ , we have $x \to 0$, Using this, $\lim$ we have,   $$ \boxed{ \lim_{x \to 0} \frac{\sin x}{x} = 1} $$  Using this in $(3)$, we have,  $$ \large \boxed{\frac{\sin (2x)}{2x}} \tag*{(4)} $$  All the steps sort of make sense. My doubts are,    How do I do this for other trigonometric ratios? How does the step 2 happen?    I need help looking into it more intuitionally.   Please provide necessary reading suggestions.   Regards.


How to change the language from German to English in MiKTeX?

Since I have a German Windows system, it seemed that my MiKTeX installed German interface automatically. Anyone knows how to get rid of this and have an English MiKTeX installed?


The question is the following: Assume $f: \mathbb{R} \rightarrow \mathbb{R}$ is continuous, and for all $x \neq 0$, $f'(x)$ exists. If $\lim_{x \rightarrow 0} f'(x) = L$ exists, does it follow that $f'(0)$ exists?  My intuition is that this does not have to hold in general. However, I keep finding counter examples such that $f'(0)$ exists where $\lim_{x \rightarrow 0} f'(x) = L$ does not exist, which is obviously not the original question.


Difference between gravity and standing on a platform accelerating upwards at 9.81 m/s^2

So, according to Einstein's theory of general relativity, gravity is not a force instead it is a consequence of objects with mass deforming spacetime, right? And so, according to him, there is no difference between standing on a platform accelerating upwards at 9.81 m/s^2 and standing on Earth, right? But, there is a difference. At least, I think it's a valid difference. If you drop two apples from a high altitude on Earth, not only will they accelerate downwards at 9.81m/s^2 but they will also slightly move towards each other because the Earth is a sphere and gravity acts radially inwards pulling the two apples closer to each other. But if you drop the apples from the same height above the accelerating platform, the apples will only appear to accelerate downwards at 9.81 m/s^2 but will not move towards each other like they would on Earth. Why is this true? Is this even a valid difference? If it isn't, why isn't it?


How do I rotate an object along it's own axis (windmill)

I'm trying to rotate the blades of a windmill for an animation but the windmill is already at an angle. When I keyframe it on it's own axis (after pressing control + alt + space) and rotate it the blades spin inwards during the animation before coming back at the end. I've tried locking the other axis but that keeps the blades from rotating back to the right orientation. Also, whenever I rotate the object 360 degrees it turns the 360 into a really small number (0.0001) so it plays forward hallway then backwards (with a 180 degree keyframe halfway). Any help would be appreciated!.


Modifying File GDB Feature Class Features Using QGIS

I've installed the File GDB API using the OSGEO4W advanced installation when installing QGIS. I've had a bit of trouble with it initially and have posted a few questions with some helpful Stack members. I can now open File geodatabase feature classes in QGIS and start an edit session, but the only thing I can do is create new features using the 'Add Feature' tool. I cannot edit existing features because the 'Move Features', 'Node Tools', 'Delete Selected Features' and the 'Cut, Copy and Paste Features' Tools are all greyed out.  I've tested this using both ArcGIS 10.0 and 10.1 file geodatabases with the same result. The tools are greyed out except the 'Add Feature' tool even though the layer is selected and active.  I tested to see if I can get the tools to be active by using an ESRI Shapefile and this works which leads me to believe that the API isn't working as I think it should.....or maybe I'm just being a bonehead. Has anyone else experienced this behavior? Should I be able to modify existing features or should I only be able to create new ones?


if $|f(x)-f(y)|\le |x-y|^{\sqrt 2}$ then is $f$ a constant function?

if $f: \mathbb{R}\to \mathbb{R}$ satisfies $$|f(x)-f(y)|\le |x-y|^{\sqrt{2}}$$ for all $x,y\in \mathbb{R}$ ,then is f increasing ,decreasing or constant? in my view ,it is clear that $|f(x)-f(y)|$ is not zero so it is not constant. And since the rate of change is positive so the function would be increasing.Is my solution correct or wrong?


I tried to fix this problem by reading the answers to the questions on this forum related to this topic, but I did not find any solution. Could you help me, please? The thing is that I have to break a long equation with an initial bracket...Because of that, I am not able to use neither split nor align...Here the text  \begin{equation} u_{i}^{n+1} = \frac{1}{2} \hat u_m^n e^{Ii\phi_m} \left\{ \frac{1}{2} \left(e^{I\phi_m}+e^{-I\phi_m}+2\right)  -\frac{\Gamma}{2} \left(e^{I\phi_m} + e^{-I\phi_m}\right) - \Gamma \left[ \frac{1}{2} \left(e^{I\phi_m} + e^{-I\phi_m}\right) - \frac{\Gamma}{2} \left(e^{I\phi_m} + e^{-I\phi_m} -2\right)\right] \right\}. \notag \end{equation}


How does the fabric of space-time bends?

So I get the analogy of the fabric of space-time bending as a sheet would bend with the weight of a ball on it, but that explains the "outside" how would the fabric warp inside the earth? Like the "line" passing through the center of the earth, would it be bent? What about some meters around it?


Having trouble understand the proof of Rouché's Theorem

I am trying to understand this proof of Rouché's theorem, but I am missing the logic of the last and most crucial step. Here are the assumptions:     Suppose that $ f $ and $ g $ are analytic inside and on a regular   closed curve $ \gamma $ and that $ |f(z)| \gt |g(z)| $ for all $ z > \in \gamma $. Then $$ \mathcal{Z}(f + g) = \mathcal{Z}(f) \text{ inside > } \gamma $$   The proof goes as follows:  First note that $ f \neq 0$ on $ \gamma $ since otherwise $ |g| \lt 0 $ which doesn't make any sense. So, we can write the following:  $$ \mathcal{Z}(f + g) = \frac{1}{2\pi i} \int_{\gamma}\frac{(f+g)'}{(f+g)} = \frac{1}{2\pi i} \int_{\gamma} \frac{(f(1 + \frac{g}{f}))'}{f(1 + \frac{g}{f})} = \frac{1}{2\pi i} \int_{\gamma} \frac{f'}{f} + \frac{1}{2\pi i} \int_{\gamma} \frac{(1 + \frac{g}{f})'}{(1 + \frac{g}{f})} $$  We know $ f $ is analytic, so $ \frac{1}{2\pi i} \int_{\gamma} \frac{f'}{f}  = \mathcal{Z}(f) $ by the argument principle. What I don't know is, why is $ \frac{1}{2\pi i} \int_{\gamma} \frac{(1 + \frac{g}{f})'}{(1 + \frac{g}{f})} = 0$?


I'm looking for a way to compare two lapses of time.   If the second lapse or part of it is in the first one -> return false. Although, if the first one or a part of it is in the second one -> return false too.   I feel like I didn't have to skive math lessons...  I got   // first lapse $a = strtotime('2016/05/04 22:50'); $b = strtotime('2016/05/20 22:15'); // second lapse $y = strtotime('2016-05-12 12:00'); $z = strtotime('2016-05-20 10:00');  if (($y >= $a && $y <= $b) || ($z >= $a && $z <= $b) || ($a >= $y && $a <= $z) || ($b >= $y && $b <= $z))      return false;   But it's quiet confuse in my brain. I'm not sure it does what it supposes to do. Thank you.  Edit   I found my question was duplicated


I'm not aware of everything that is in The Flash lore (comics, animated series, etc.) but I did watch some of it to notice that, I never saw an explanation on how he can breathe when running? By that, I mean, the faster you run, the more you would normally breathe. I understand it's either probably just omitted for the plot/because it's fiction, or maybe it's explained somewhere I overlooked. As for which instance of "The Flash" I'm referencing... well, I wouldn't know myself given I don't know enough of the lore (as already stated) but I guess it can be taken as a "general" question, rather than specific.


Harouni of course became familiar with this   ubiquitous man, who not only accompanied him on   his tours of inspection, but morning and night could   be found standing on the master bed rewiring the   light fixture or in the bathroom poking at the water   heater. Finally, one evening at teatime, gauging the   psychological moment, Nawab asked if he might say   a word. The landowner, who was cheerfully filing his   nails in front of a crackling rosewood fire, told him   to go ahead.      “Sir, as you know, your lands stretch from here to   the Indus, and on these lands are fully seventeen tube   wells, and to tend these seventeen tube wells there is   but one man, me, your servant. In your service I have   earned these gray hairs”—here he bowed his head to   show the gray—“and now I cannot fulfill my duties   as I should. Enough, sir, enough. I beg you, forgive   me my weakness. Better a darkened house and proud   hunger within than disgrace in the light of day.   Release me, I ask you, I beg you.”      The old man, well accustomed to these sorts of   speeches, though not usually this florid, filed away at   his nails and waited for the breeze to stop.   “What’s the matter, Nawabdin?”   This excerpt from the SAT practice test is questioned. It asks for the purpose of the second paragraph. The choices are as follows:  A) flatter Harouni by mentioning how vast his lands are. B) boast to Harouni about how competent and reliable Nawab is. C) emphasize Nawab’s diligence and loyalty to Harouni. D) notify Harouni that Nawab intends to quit his job tending the tube wells.   The answer is C. But, why is it not D. Can anyone please explain? Thank you for your help


Why is "messenger" the term instead of "messager"?

Just wondering how we got from message to messenger instead of message to *messager?  When and why did this happen with this word? I'm not really interested in the rule so this isn't a duplicate, more interested in this word specifically.


Why didn't Thor take Loki's sceptre at the end of The Avengers?

At the end of The Avengers, Thor takes Loki as prisoner & also takes the Tessaract, to be placed in Asgard.   But why didn't he also take Loki's sceptre with him?   It was a source of power & mind control which was later revealed to be the Mind Infinity Stone.


How to change font type faces in table row?

Is possible to change font faces in whole row on similar way as it is possible for columns?  \documentclass{article}     \usepackage{array}      \begin{document} \begin{tabular}{>{\bfseries}c *{4}{c}}     \hline  A & B & C & D\\% text in this row should bold or italic ...     \hline  1 & 2 & 3 & 4\\  5 & 6 & 7 & 8\\     \hline \end{tabular}     \end{document}   For example, is possible to define macro similar to macro `\rowcolor`` defined in , which will change font face in just one table row?


Nearby wi-fi channels - What is the level of interference?

Speaking of 2.4ghz networks, if my neighbor chooses channel 3, at 20mhz I know that this will also interfere with channels 1, 2, 4 and 5. What I would like to know is what is the level of interference? For example, if I choose channel 4, would it be practically the same thing as choosing channel 3? Would it have a lower degree of interference, practically the same or much less? If I chose channel 5, would it be better than channel 3 or 4? Or practically the same? (remembering that my neighbor is on channel 3).


The description of the  spell in D&D 5e says:  You touch one object that is no larger than 10 feet in any dimension. Until the spell ends, the object sheds bright light in a 20-foot radius and dim light for an additional 20 feet. (...)  Can I cast the Light cantrip on an 11-foot pole? On one hand, 11 is greater than 10. This would suggest that the answer to my question is "no". On the other hand, I could put an 11-foot pole in a 10×10×10-foot box. This would suggest that the answer is "yes". I don't expect that the success of an adventure will hinge on the answer to this question any time soon, but I would like to understand how dimensions are supposed to work.


How would I say two triangles are congruent?

There is a sign to signify two triangles are congruent. It looks like this: ≅. How would I do this in latex?


A dense, uncountable subset of reals whose complement is also dense and uncountable in every interval

Does there exist a dense set of reals which is uncountable in every interval, whose complement is also dense and uncountable in every interval? So, for example, the union of positive rationals and negative irrationals would not work for my question.


I've seen over and over again the request to .  To solve this, the SO engine can learn from the corrections the users perform for a given tag. If there is a big occurrence of "editions" it means that one is common tagging error. The system can learn from these corrections and suggest the most popular one.  So here's how it would work:   The user tags the question with a misspelled (or not so common) tag   e.g. tag = finaly   The system checks for tags correction count.   The larger the number of "fixes" performed in the past, the more weight is given to a suggestion (so just a couple of fixes won't trigger anything).  If the "Did you mean" threshold is reached the system shows the the question and prompts: "Did you mean Finally?" with a link to accept the suggestion (just like google does). If the user click the link, it means the tag is accepted (this would count as a correction too, giving more wight to the suggestion) .  If the user ignores the suggestion nothing happens, the user entered tag is used.   References:


paramiko. answering questions asked by equipment

I'm trying to set a new password on a router using paramiko. In Ubuntu terminal it looks like that:  admin:~$ ssh admin@IP_address IP_address's password: password You logged in: router command line : router_1>set_password Changing admin's password type old password : type new password : retype new password :   So when I'm trying to do the same with python as soon as it comes to set password   import paramiko ssh = paramiko.SSHClient() ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy()) ssh.connect(hostname='IPaddress', username='admin', password='password') stdin, stdout, stderr = ssh.exec_command(command='set_password')   it pops out a window or a line asking to input old password  Is it possible to input thous passwords automatically ?


Is an extended spring gain mass from potential energy?

Is it true that when a spring is extended, potential energy is stored in spring and result in gain of mass of the spring?


I know it seems unlikely to accumulate sufficient amount of antimatter to let it collapse under its own weight to become a black hole(maybe the gravity works differently I don't know) since they will definitely react aggressively with ordinary matter which made up most of our known universe producing energy.  My question is can we accelerate antimatters and then let them collide with enough energy to produce a tiny black hole? would this tiny black hole shares similar properties with its normal counterparts?  Oops I almost forgot what kind of particles are produced in the abovementioned collision? (e.g. antiproton-antiproton)


apt update hangs - error message in Ubuntu 16.04

I cannot update Ubuntu 16.04 due to the following error:   Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable) E: Unable to lock directory /var/lib/apt/lists/   How should I proceed in trying to update?


How can I reveal these groups inside of collections in blender 2.9

I have project that I worked on in blender 2.6/2.7x and now Im decided to switch to blender 2.9 but  when I open that file I'v got some groups which are gread out and dont see them i view port. How can I make them visable again ?


Using Lenovo Legion Y540 With 256 SSD+1TB HDD: There is 160gb Free Storage available in SSD , but i'm not able to shrink the drive(Only 25GB is getting shrinked). So how can I install Ubuntu on SSD? Will it be better to Install on HDD? Please help me out , I tried a lot but can't figure it out ALSO , how to install it on HDD I'm a first time Installer of linux* Laptop: Lenovo Legion Y540 RAM : 8GB SSD : 256GB HDD : 1 TB BIOS : UEFI


How can I tell Ubuntu to automatic turn the primary screen of when I connect a secondary screen?  Case: I have my primary monitor connected through a Display port, and sometimes I connect a tv through a HDMI port. When I do this the desktop expands with a blank desktop on the TV.  Instead I want the primary monitor to automatic turn off, and stay turned off, as long as the HDMI is connected to the TV. So that the full desktop is visible on the TV instead. And the primary monitor to turn back on, when the TV is disconnected.  Is that possible?


I have a table as shown below.My question is:How can I convert columns into rows?BTW,I'm using Microsoft SQL Server 2005.  my input Data    ONAY_ID  sip_RECno    KULLANICI       ONAY    1           1         user1          true    2           1         user2          true    3           1         user3          false    4           1         user4          true   Output would be   sip_RECno  user1     user2    user3     user4           1          true     true    false    true


On the circle $S^1$ there is the usual , i.e. the group isomorphic to $\{e^{i\varphi}\mid \varphi\in[0,2\pi)\}$ with complex multiplication as group operation. This group is a topological group in the sense that $S^1$ is a topological space and the group operation and the inverse are continuous.     Question: Are there other topological groups on $S^1$ essentially different from the circle group, assuming $S^1$ with the standard topology? What about other abelian topological groups?   My question was motivated by  other post. The group described there turned out to be just the usual one.  Two notes:   I am looking for groups involving all of $S^1$, not only a subset. Especially no subgroups of the circle group. I am looking for groups not isomorphic to the circle group.


Do we need the Axiome of Choice in proving a Sequentially Compact Metric Space is Totally Bounded?

I'm really wondering if the Axiom of Choice is essential in this proof.


How to recover a deleted file from /data partition?

I factory reset my rooted Android M phone but now I realize that there was a file in the /data directory which I need.  Is it possible to create an image (.img or something similar) of the /data partition so that I could run some recovery software for ext4 on that image? I have a little knowledge about ADB.


I have two domains (.com and .co.uk) with different websites. In .co.uk domain I have a good ranking and my idea is to redirect the .co.uk domain to .com. I think I have to use 301 redirect.  My questions is, I have two different websites, the two websites are different but with the same categories and some products, I have to create only one redirect of home to home or a should create other pages like similar products, categories and other similar pages in both sites?  The created backlinks usually goes to homepage, so I thought I just needed to redirect the homepage.  I don't want to lose the ranking and have problems with Google crawl.


Find the residue of $\frac1{z-\sin z} $at its pole.

$f(z)=\frac{1}{z-\sin z}$  Now $z-\sin z=z-(z-\frac {z^3}{3!}+\frac{z^5}{5!}\cdots)$  After solving $z=0$ is a pole of order $3$ for $f(z)$ and $$f(z)=\frac1{z^3(\frac1{3!}-\frac{z^2}{5!}+ \cdots  )}$$ What is next?


I found CD images for the 18.10 beta, but I'm wondering if there is a way to upgrade OTA. I have the bionic-proposed box checked, but there is still nothing.


Doubt about the existence of a limit at infinity

From what I know, limits only exist if both side limits exist and are equal: $${\lim_{x\to a}f(x) = L}$$ $$if$$ $${\lim_{x\to a^+}}f(x) = {\lim_{x\to a^-}f(x) = L}$$   But can this be applied to limits at infinity? In that case: $${\lim_{x\to \infty}f(x) = L}$$ $$if$$ $${\lim_{x\to +\infty} f(x)} = {\lim_{x\to -\infty}f(x) = L}$$  Is this correct or ${\lim_{x\to \infty}f(x)}$ should be taken as ${\lim_{x\to +\infty}} f(x)$ ?


What is the abstract idea behind energy?

Many theories use something called energy to explain reason behind certain phenomenon, but I have not been able to grasp the idea of energy. Maybe it is because I have grown in a society where the word energy has a completely different meaning, I don't really care about that though.   When I started studying about energy, I got acquainted to a physical quantity called Work, which is defined as $W = F . s$. I never really understood why this quantity was defined. And moving on, I got to know that "Energy is the ability of a system to do work". After reading this relationship, I certainly didn't have any sense, any reason behind this relationship between energy and work. I simple mechanics, I always thought that if an object has energy, it can provide a force. But never understood why we say that "if an object has energy, then it can provide not just force, but $F . s$ , which is work". So my first question is: Why have we defined work to know what energy is? And why only $W = F . s$?  Then, when I accepted this unusual fact(to me atleast), I encountered the equation $E = mc^2$, or mass-energy equivalence. I have read many resources stating the mass can be converted to energy and vice-versa (even my book uses this statement), which seems highly against my intuitive sense of what energy is.  I know this question has been asked at Phys. SE previously, I have also read the answer to it. But still, there is a confusion in my mind as to what energy is.  Before asking my main question, I would like to share my thoughts as to what energy seems to me. When I think of energy, I think that if an object has energy, it can provide a force. That's it. What else it can do, because all forms of energy that we have, whether its Kinetic, Potential, Electric, even Heat(in which particles vibrate and thus exert a force on near particles), all of them exert a force.   I also read an answer on Phys. SE regarding this question, in which an answerer put on the views of Feynman, which stated that "energy is something that is conserved, it is a numerical value that remains constant, no matter what process has occurred. It is a law of nature".   So my final question: With all these confusions regarding what is energy, why do we use Work to define energy Mathematically(like energy has unit Joule, the same unit as work)? And why are my thoughts regarding energy are not true, even when we encounter forces with most of the energies? Or even simply, not including any mathematics, what is the idea behind energy?


Prove that there do not exist nonzero integers $a$ and $b$ such that $a^2=3b^2$.

Well, by intuition, of course there is doesn't exist any nonzero integers, but how would you prove that? I was thinking of doing the GCD of $a$ and $b$ is $1$, but that leads me to nowhere.


What is the best way to store potatoes that were already cut?


I am beginner enthusiast. I was trying to make lights under my bed by following this tutorial:    It worked for me with a 1 meter color RGB led strip. However, when I put a white LED 5 meter strip, it can not go bright enough and it seems to be at 30% brightness.   The only MOSFET I have at home is IRF520. Is this the reason for my dim light? If yes, what kind of MOSFET would fit? Is there a way I can learn to calculate it?


Inductive Proof that $k!<k^k$, for $k\geq 2$.

Call $P(k): k!<k^k$, for $k\geq 2$ Test it out with 2, and it's true ($2<4$).   Assume that $P(k)$ is true for some $k\geq2$.  Then show that $P(k+1)$ is true.   $P(k+1): (k+1)!<(k+1)^{k+1}$  Ministep: $(k+1)!=k!(k+1)$ Ministep: $(k+1)^{k+1}=(k+1)^{k}(k+1)$    $k!(k+1)<(k+1)^{k}(k+1)$  Can I just pull out that (k+1) and call it a day? That will make $k!<(k+1)^{k}$.   We're already assuming that $k!<k^k$, for some integer $k\geq 2$, and I don't think I need to prove that $k^{k}<(k+1)^{k}$. I mean, I guess I could go prove that as well, but let's assume for the moment that I don't have to. Since we're assuming the original $P(k)$ is true, I should be able to write $k!<k^{k}<(k+1)^{k}$ right? That would prove the $k+1$ case. Is this the correct way to go about things? It seems too easy, but makes sense.  Thanks for confirmation and/or pointing out mistakes!


Why are my objects invisible and in the wrong places?

When I add an object, it is invisible. When I change to evee, it turns black, and when I move around the view, it takes away from the black and makes it grey. Then when I turn to cycles it turns grey like in solid view. I've already tried rolling back my drivers, and it doesn't effect anything. I am using Blender 2.81. Everything was normal for a while, then all of the sudden I added an object and it was invisible. When I restarted my computer, it did the same thing but only when I was close. The origin and outline are still there. My clip start was set very low, but even when I change it it didn't change anything. One time when this was happening, I deleted everything, then added a new cube. It was displayed as one of the old cubes, but the outline was not in the right place. When I add more objects, some of them disappear and others display the wrong shape. This only happens in object mode, and going into edit mode fixes it. This only happens every so often, and seems to just magically be fixed.


Decompose into Partial Fraction. Image Added.

I really had no idea how to write these questions out without copying and pasting them onto here, so I am sorry for that..I hope adding a picture is fine. I would appreciate any kind of help, and if you dont mind suggesting a useful website, or video that can explain these problems to me. Thank you


On a MacBook Pro with OS X 10.9.1 (13B42) with both the trackpad and a Bluetooth "magic mouse" I observe an excessive amount of (especially) horizontal scrolling.  A trivial touch to the mouse (or touching the trackpad with two fingers) may result in dozens of (especially horizontal) scroll events. This is especially pronounced in Excel, Firefox, and Emacs (which notice horizontal scrolls) but not in Terminal and Outlook (which mostly ignore them).  Mouse tracking in system settings is set to the 3rd notch (out of 10).  It is possible to disable or reduce horizontal scroll events?


What is the place of "say" between 2 direct speeches

I read a book, and I see that: "Oh - the black hat," I say. "No!" says Shami. "The blue hat is nicer." We watch and wait. In the end, the woman takes the blue hat. "Hurray!" says Shami. ‘Where is she?’ Leon says every day ‘Oh stop it, Leon,’ says Shami. I want to know what is the situation to use "say + S" and "S + say" Thank you


There is a square that vertices are (0,0) (0,2) (2,0) (2,2)

A point P satisfies following condition  : The straight line passing through P and dividing the area of the square  by 1:3 does not exist.  Can we know the locus of P and the area of the locus ?  I think it has to do with logarithm function..


I have this question that I think  may be interesting to all maths' lovers.  We have $5$ rooms in a row : Room $1$-Room $2$-Room $3$-Room $4$-Room $5$.   There is a little mouse in one of the rooms. А cat tries to catch the mouse and put his leg into one room. If the mouse is in this room then he catches the mouse, otherwise the mouse moves to a nearest room. Тhen the cat again chooses any room etc.  What is the cat's algorithm for catching the mouse?


How is Zeno's Dichotomy Paradox resolved according to physics?

I always thought of quantum space and quantum time as a solution, but then i figured out that "quantum space-time" is not actually true(yet). I've also heard of the calculus approach and limits, but i don't see how the paradox is resolved since limits tell you what happens as you approach a value not at that value itself.  What's the solution?


View full history for powershell, not just current session

Powershell now handily remembers history from previous sessions, and I can get to earlier commands simply by using the up-arrow. What I would like though is to be able to display this history, but I can't figure out how to do it.  The command get-history for some reason only seems to be able to display the history for the current session. Even passing the -count option doesn't help.  At the moment the only way I can get to a previous command is to manually up-click through all previous commands to find the one I'm looking for. This obviously can be quite tedious if the command was run a while ago.  Is there some trick to make get-history work correctly, across sessions. This list is obviously stored somewhere, so it aught to be possible to display it.  edit: This isn't a duplicate question. This is about accessing the full history which is already recorded by Powershell, not about adding a new (custom) way to save session history. Those other questions and associated answers were relevant before Powershell had the ability to automatically record full command history.


Blender 2.81 screen upon loading  so, all of a sudden i'm having issues now with blender. i uninstalled and reinstalled blender 2.81 and 2.9, and they are both having the same issue upon initial loading. NONE of the preferances has been changed or anything. this is a picture of the stock cube that is given everytime. and as you can see in the screenshot, the viewport shading is set on wireframe, so i should be able to see it all, but i don't. i've checked all the settings and everything and nothing helps. i installed it on a seperate computer, on the off chance that it was my desktop going bad, but alas, on my laptop it is having the very same issue, new install and everything. if anyone else is having this problem and has fixed it, please let me know!!! i am in the middle of developing a video game and now i can't use blender to 3d model anything anymore.


Can't bootUbuntu 64-bit using Virtual Box on host Windows 7 64-bit

The error I get says,     This kernel requires and x86-64 CPU, but only detected an i686 CPU.   Unable to boot - please us a kernel appropriate for your CPU.   I have Enabled I/O APIC.


conditional expectation under bivariate normal

When $X$, $Y$ are bivariate normal, how can we calculate the conditional expectation $E(X\mid X>Y)$? A more concrete setting of this general problem can be referred .


If you are spinning an object using a mass-less string with constant speed in a vertical circle, and when the object is at an angle with the vertical, what happens to the component of weight in the tangential direction?  $$mg \cos\theta + T = \frac{mv^2}{R}$$ $$mg \sin\theta =\ ?$$  or am I completely wrong in assuming no tangential acceleration?


Exactly why coefficient of $x^ky^{n-k}$ is $C(k,n)$

in combination when we have a binomial lattices like $(x+y)^n$ the coefficient of $x^ky^{n-k}$ is equal with $C(k,n)$ ...  for example we have $(x+y)^4$ so we have this $4$ factor $(x+y)(x+y)(x+y)(x+y)$ and we want to find the coefficient of $x^2y^2$ ?  I want a complete answer thanks !!


So in my text I have this code running \centering \includegraphics{right} \end{figure}  However, when I compile the tex, I get this image:  I don't have this image in my file directory and the folder looks like this:  And the image that should show up is this:  So can someone tell me if this is a latex thing (I am using texworks) or is something wrong with my computer. It only happens with this specific file and not anything else.


Is there any difference between “which” and “that”?

What is the difference between the words which and that?  For example I have the following sentences:   “I have a car which is blue.” “I have a car that is blue.”   Are there any rules specifying usage of which and that?


Problems with Partitions After Remove Windows

I've recently removed the Windows partition  keeping Ubuntu as single OS. The way I did it was through an Ubuntu Live boot-drive, using the Try Ubuntu option. In Gparted I simply removed the referred partition. This is what Gparted shows:  /dev/sda1..fat16....39.19 MiB  unnallocated..unnallocated..281.78 GiB  /dev/sda4..(KEY)..extended..183.94 GiB  ../dev/sda6..ext4..180.03 GiB  ../dev/sda5..(KEY)..linux-swap..3.91 GiB  unnallocated..unnallocated..1.02 MiB    My problem is that I can not expand my ext4 partition. My goal is to make the unallocated space usable. Can anyone help me?  I would like to clean up this partitions too, keeping just what I use.


Do the new iPhone 12 and 8th Gen iPad use the same wall adapter?

I recently just bought a slew of apple products, including an iPhone 12 Pro and an 8th gen iPad. This is the first time I've used iOS devices as daily drivers and I've been warned a few times not mix up the wall adapters for the iPhone and iPad as they draw different current. However, it's a bit confusing as they look identical. I figured the small text on the charger would give me the info I need to discern between the two, however they appear to be identical as well. They're both model A2305 with the same info on input and output voltage and current. The only difference is the long string of characters after the Made in China notice. One ends with AP and the other with AH. Do the newest generation of iDevices use the same wall adapter, or was a perhaps given a bad adapter?


SQL Server How to array a comm separated field

I'm need to separate out this table as follows:    I've heard this may be possible using a CURSOR function? Can anyone help please?  Select id, tag from mytable


How many possible electromagnetic wavelengths are possible?

Disclaimer: Please keep in mind that I am a young highschool student with no background in physics, this research was done in the course of an hour, and my reasoning could very well be wrong.  After a short conversation about color, I did some thinking, and read  The answer claims that there are $\infty^{\infty}$ colors   My first problem is the definition of colors, I'm going to simplify this (although it's not the same thing) as electromagnetic frequencies. This is what I mean when I refer to color in the rest of this question  The problem with $\infty^{\infty}$ colors is that the plank length exists. This causes two problems to arise with $\infty^{\infty}$. If $l_p$ is assumed to exist (as it is), this means the smallest distance in the universe is $l_p$. So, all wavelengths of light can be divided into a set, of the wavelengths produced by objects at $0^{\circ}$ Kelvin to $\infty^{\circ}$ Kelvin. According to this logic, there are simply $\infty$ colors.  Things are complicated further, when you introduce the Plank Temperature ($P_t$). $P_t$ is the theoretical limit temperature of the universe (at least for the purposes of light and color) Because an object hotter than $P_t$ will produce light with wavelengths shorter than $l_p$. This would introduce an upper limit on colors too.  Wouldn't this mean that the total number of possible colors is equal to however many plank lengths difference there is between an electromagnetic wave produced by a 0 degree object and a $l_p$ object? And therefor far less than $\infty$? Does this reasoning make sense at all?


Why ln -s creates relative broken links?

I have an issue with ln -s on Ubuntu 14.04, while using it in the following scenario:  $ cd ~/programming/tmux/ $ ln -s tmux ~/bin/tmux $ ls -l ~/bin/tmux lrwxrwxrwx 1 USER USER 4 sie 31 11:02 /home/USER/bin/tmux -> tmux   Why is it like so? When I create it giving the absolute path everything works fine:   $ ln -s ~/programming/tmux/tmux ~/bin/tmux $ ls -l ~/bin/tmux lrwxrwxrwx 1 USER USER 4 sie 31 11:02 /home/USER/bin/tmux -> ~/programming/tmux/tmux


My MWE is as follows:  \documentclass[paper=a4, fontsize=12pt]{article} % A4 paper and 11pt  % font size \usepackage[english]{babel} % English language/hyphenation \usepackage{amsmath,amsfonts,amsthm} % Math packages  \begin{document}     \begin{align*} (\mathbf{n}\cdot \mathbf{\sigma}) \sigma&=\mathbf{0}     \end{align*} \end{document}   But the results show \mathbf{\sigma} and \sigma the same. Why?


jquery onclick change css background image

am using this code to get menu tab.when i mouseover on the tab the tab image will change, similarly i want to change the image of tab onlick using jquery.i used the below code to do this but i was not able to get it.how can i do this.            <title>Css Menu</title>     <link rel="stylesheet" type="text/css" href="css/style.css">

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How can I have commas displayed in jQuery numbers

I am trying to animate numbers to count up to the number specified in a div. This works but I would like the number to include the necessary commas. For example 62000000 should display as 62,000,000 - is there a way to do this by adding the commas to the numbers in my div or by having js add the commas automatically? Demo   $(function(){     var current = 0;     var finish = jQuery('#statAssistance .statNum').text();     var miliseconds = 3000;     var rate = 100000;      var counter = setInterval(function(){          if(current >= finish) clearInterval(counter);          $("#statAssistance .statNum").text("$" + current);          current = parseInt(current) + parseInt(rate);     }, miliseconds / (finish / rate)); });


Can I use Launchpad to replace the ubuntu software centre?

I found  there's loads of applications to choose from there it seems like all of them. You've got to add the ppa, update then install the applications. This can be pretty cumbersome if you plan on installing a few with the terminal.  Is there a launchpad application that replaces the ubuntu software centre? Does the synaptic package manager index everything in launchpad? maybe that's what I'm looking for let me know cheers :)  After asking


I need a good word for the object a care-taker is taking care of. The term will be used in scientific environment, more specifically in IT: we have an application which is "monitoring" other applications's status and in case it senses some "deviation" from normal behaviour it takes specific actions (restart, allocate more resources, etc, not relevant).   But I just don't know how to call these "applications that some other application takes care of" ...


How can I unlock an iPod touch which has VoiceOver enabled?

My iPod touch 5th generation has VoiceOver enabled and is not letting me into my home screen. Triple-pressing the home button doesn't work. How can I unlock my device?


I placed Auriel's Bow in a chest at Nightcaller Temple. When I came back it was gone, what do I do? I'm playing on XBox, not PC.


Moving dead ahead: rhumb line, great circle or none

I think I understand the whole rhumb line and great circle idea but I can't seem to find an answer on this question. Suppose I am driving a car (i don't use ship because I don't want to put the constant compass bearing idea on the table) and that I can move for quite a long distance on land (across Russia for example) without any obstacles. If I keep the steer fixed so that the car moves dead ahead will I be following a rhumb line, a great circle or none of these.  I've found this on wikipedia:     If you were to drive a car along a great circle you would hold the steering wheel fixed, but to follow a rhumb line you would have to turn the wheel, turning it more sharply as the poles are approached   but everything else I've found seems to contradict this. And yet I'm not sure if keeping the steer fixed means fixed dead ahead or fixed turned at 30 degrees left for example.  EDIT After a request to give some examples of contradicting information found on the internet I edit my question to quote an example:       The problem for navigation is that sailing a true great circle would   require constant changes in the course steered   I now understand that what the writer of this text probably refers to when writing course steered is holding the compass indication unchanged. But this way of phrasing it is (at least to a not native english speaker like me) very confusing. In my mind "sailing a true great circle would require constant changes in the course steered" means that i have to constantly turn the ship's steering wheel in order to reach my destination.  I had found some similar examples which I can't find again now. But the greatest problem was I couldn't find any other source stating clearly that moving dead ahead equals following a great circle.  However, stating that "everything else I've found seems to contradict this" was a bit of an exaggeration and I apologize for it.


I have Dell Laptop " N 5110 "    How do make 2 finger scrolling work + 2 fingers zoom in & zoom out work How to Fn + f3 To lock touchpad How to configure 1 2 3 as shown in pic   3.1 For Ubuntu Software Center  3.2 For System Settings  3.3 For Screen Off      Nothing Work & i did google but find nothing   xinput list ⎡ Virtual core pointer                             id=2 [master pointer  (3)] ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)] ⎜   ↳ PS/2 Generic Mouse                        id=13   [slave  pointer  (2)] ⎣ Virtual core keyboard                          id=3   [master keyboard (2)]     ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]     ↳ Power Button                              id=6    [slave  keyboard (3)]     ↳ Video Bus                                 id=7    [slave  keyboard (3)]     ↳ Video Bus                                 id=8    [slave  keyboard (3)]     ↳ Power Button                              id=9    [slave  keyboard (3)]     ↳ Sleep Button                              id=10   [slave  keyboard (3)]     ↳ Laptop_Integrated_Webcam_HD               id=11   [slave  keyboard (3)]     ↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]     ↳ Dell WMI hotkeys                          id=14   [slave  keyboard (3)]


Should we really allow thank you comments?

From the :     We’ve started with user research, and we’re keeping an open mind to all ideas. There are opportunities to work on things like reviewing site copy for inclusive language. Maybe it’s time we re-visited things like our “no pleases or thank yous’” rule. (It serves a valuable purpose by keeping signal high, but also suggests that we just might be Zuckerbots who aren’t even trying very hard to pass as actual humans). In any case, here are some areas we’re planning to focus on first:   This has received very little notice, among all the other controversies resulting from the post, but should we really allow thank you posts? Won't it clog up the site?  There's no reason to allow thank you posts. All it would result in is an inane amount of notification and tons of visual clutter in the comments.


I'm curious why rockets are so big in their size. Since both the gravitational potential one need to overcome in order to put thing into orbit, and the chemical energy burned from the fuel, are proportional to the mass, so if we shrink the rocket size, it would seem to be fine to launch satellites. So why not build small rocket say the size of human? I can imagine small rocket would be easier to manufacture in large quantities and easier to transport. And maybe someone can make a business out of small rocket, carrying one's own satellite.


Stop LaTeX from breaking an inline math equation

I hope this question was not asked before. At least I haven't found it. I have an inline math equation and LaTeX is breaking it into two parts. In this case I'd prefer to have the whole and short equation in one line. Is there any way I can do that? I already tried to put it into a \mbox but that destroyed the whole layout. Here is an example:  \documentclass{minimal} \usepackage{siunitx} \begin{document} A text with an inline equation which is broken in to two parts but is not wanted right here $v_{initial} = \SI{1000}{m/s}$. \end{document}   Here the result would be:  A text with an inline equation which is broken in to two parts but is not wanted right here v_{initial} = 1000m/s.


Why can't I declare a friend through a typedef?

Does anyone know why typedefs of class names don't work like class names for the friend declaration?  class A { public: };  class B : public A { public:    typedef A SUPERCLASS; };  typedef A X;  class C { public:    friend class A;             // OK    friend class X;             // fails    friend class B::SUPERCLASS; // fails };


Should I flag obviously wrong answers as NAA?

I came across some scenarios like these:     Case 1: Obviously not true       Q: Why does the sun rise and fall every day?   A: Because the Earth .   A2: Because .     Case 2: Letting the OP do what is declared not to       Q: How can I charge my phone without a charger?   A: Try the USB ports on your computer.   A2: Go buy a charger.    Case 3: Attempt to joke (despite looking like a real answer)       Q: What's this round bird in bright red? [An image]   A: It may be a rare or mutated species of sparrow.   A2: It's a .   A3: It's an .    Should I flag A2/A3 as NAA in those cases?


I have the list of figures and the list of tables, and I want them to appear at the end of the Contents List. See in the following image:   that the list of Figures and Tables are at the beginning of the contents, but i want them at the end. How can I do that?   Thank you.


Did Lupin truly suggest that Sirius thought Lupin was a spy to the Dark Lord?

In Harry Potter and the Prisoner of Azkaban chapter 19, when Peter Pettigrew is in a really tight situation, he is pleading to Remus Lupin this way.     ‘Remus!’ Pettigrew squeaked, turning to Lupin instead, writhing imploringly in front of him. ‘You don't believe this … Wouldn't Sirius have told you they'd changed the plan?’      ‘Not if he thought I was the spy, Peter,’ said Lupin. ‘I assume that's why you didn't tell me, Sirius?’ he said casually over Pettigrew's head.      ‘Forgive me, Remus,’ said Black.      ‘Not at all, Padfoot, old friend,’ said Lupin, who was now rolling up his sleeves.    (In that conversation changing the plan refers to using Peter as the Secret-Kepper instead of Sirius.)  Had Sirius really believed at some point that Lupin was the spy?  Was Lupin suggesting it seriously that Sirius would believe that?    I have the impression that neither of them actually thought that.  Lupin had been convinced that Peter was guilty from the point when he saw him in the map, and at this point they managed to convince Harry as well.  Lupin may have had enough of Peter's pointless objections and wanted to get over with this conversation as fast as possible, which is why he said this, and Sirius went along.  But other readers didn't seem to have perceived the dialog that way.  What's the truth?


The most intuitive way to input credit card expiry dates

So the two options I am considering is a drop down for months, showing the number followed by an abbreviated month, e.g. 02 Feb. Or a text field, that splits the numbers into the format MM / YY. With a placeholder MM / YY.  Which is the most likely to convert for an expiry date, open to other options.


iOS unable to hide toolbar UIbarButtonItem

I am unable to find the way to hide a UIbarButtonItem set on a toolbar. The button is properly declared and linked on IB. However the following line does nothing,  self.botoVolver = nil;


A generalization of the Law of Iterated Expectations

I recently came across this identity:  $$E \left[ E \left(Y|X,Z \right) |X \right] =E \left[Y | X \right]$$  I am of course familiar with the simpler version of that rule, namely that $E \left[ E \left(Y|X \right) \right]=E \left(Y\right) $ but I was not able to find justification for its generalization.   I would be grateful if someone could point me to a not-so-technical reference for that fact or, even better, if someone could lay out a simple proof for this important result.


Why do people rule out local hidden variables?

I bet the automatic response to my question would be "Bell's theorem" and of course I am not disputing Bell's proof. I am however uncertain of one of his assumptions.  The so called "no conspiracy" assumption states that we somehow posses this magical thing called free will which makes us able to break free from the causal chain of events that make us measure the $y$-axis instead of the $x$-axis and so on in experiments. Obviously this makes little sense once reviewed under the light of logic. What this naturally implies is that, if a theory is fully deterministic, it is instantly super-deterministic.  Simon Kochen and John Conway published a theorem in 2009, , which simply-put states: either everything is deterministic (super-deterministic) or every particle has free will.  Among the few who accept this to the fullest extent is Gerard 't Hooft. He has proposed that what we call sub-atomic particles are really just templates and that there is a realm beneath the quantum where the true fabric of reality is "hidden". By accepting determinism he escapes Bell's theorem (due to not having to accept the "no conspiracy" assumption) and can construct a local, deterministic and realist hypothesis of reality. In Gerard 't Hooft's model there is cellular automata somewhere near the Planck scale which gives rise to the "emergent quantum mechanics".  This means that there exist no superpositions in objective reality, the cat is always either dead or alive, no collapse of wave functions, no branching universes, non-locality or retro-causality.  The big question for me is basically: Why do people have such a hard time accepting determinism? Some will object and say "oh but it's SUPER-determinism", but that makes no sense whatsoever, either everything is determined (determinism) or only somethings are (quasi-determinism). By accepting it we escape Bell's theorem. Bell himself was well aware of this and mentioned it a few times in interviews in the 80's.  I know some are concerned that if we accept complete determinism we can no longer do science because it's all a HUGE CONSPIRACY. Gerard 't Hooft has answered critics who bring up this here: , section 6.  Additionally, another author who has taken a deeper look into the worries of "conspiracies" in QM interpretations is Peter J. Lewis in his paper  (also ).  So to all of you who dismiss local hidden variables I ask: Why?


Is it true that group of real numbers under addition isomorphic to group of complex numbers under addition

Is it true that set of all real numbers under addition isomorphic to set of all complex numbers under addition


Question: let $f$ be an entire function on $\mathbb{C}$ and let $g(z)=\overline{f(\bar{z})}$ then which of the following is/are correct?  (a) if $f(z) ∈\mathbb{R}$ for all $z∈\mathbb{R}$ then $f=g$  (b) if $f(z)∈\mathbb{R}$  for all $z∈\{z : Im\text{ $z$ }=0\}∪\{z : Im\text{ $z$ }=a\}$ for some $a>0$ then $f(z+ ia)=f(z-ia)$ for all $z∈\mathbb{C}$  (c) if $f(z)∈\mathbb{R}$  for all $z∈\{z : Im\text{ $z$ }=0\}∪\{z : Im\text{ $z$ }=a\}$ for some $a>0$ then $f(z+ 2ia)=f(z)$ for all $z∈\mathbb{C}$  (d) if $f(z)∈\mathbb{R}$  for all $z∈\{z : Im\text{ $z$ }=0\}∪\{z : Im\text{ $z$ }=a\}$ for some $a>0$ then $f(z+ ia)=f(z)$ for all $z∈\mathbb{C}$  My attempt: clearly, if $z∈\mathbb{R}$ then $\bar{z}=z∈\mathbb{R}$. Hence if $f(z)∈\mathbb{R}$ then $f(\bar{z})=f(z)∈\mathbb{R}$ so that $g(z)=\overline{f(\bar{z})}=f(\bar{z})=f(z)$ for $z$ in $\mathbb{R}$ hence (a) is correct.  But as beginner i am unable to prove or discard (b), (c), (d). I am stuck on this from hours, Please help me..


How to focus on an element using jQuery?

I have following html
    Click me    <select>        <option value="1" selected="selected">1</option>        <option value="2">2</option>        <option value="3">3</option>        <option value="4">4</option>    </select>
   jQuery:  $('span').on('click', function () {    $('select').focus();  });   What I want to do is when I click on span tag the select menu needed to be focused and dropped down without changing the structure. I spent hours to find a solution for this but I couldn't.


How can I find a formula for $$\sum_{k=1}^n k2^k$$  I'd also appreciate if someone could indicate some materials about this subject.


How to change the bracketed references at the end of an article to parenthesis, i.e., [1] to (1). The journal in question wants (1) at end of the article not [1] which I get with latex \article.


Is it possible to win a cricket match by 0 wickets?

Suppose we have an ODI match between Team A and Team B. Team B batted first and scored 300 / 6 in 50 overs. After 49.5 overs, Team A reaches 300 / 9. Player X, who is on strike, is on 98. He wants to complete his century. In the following situation, what happens:   A legal ball is bowled, and the the batsman hits it straight to a fielder at long on. Both the batsmen start running and complete a run. Player X turns back for another run. His partner is busy celebrating their win and does not turn back. The fielder throws the ball towards the bowler's end. Player X, seeing that his partner is not turning back, tries to return back. It's a direct hit, and Player X is out.   The score is now 301 / 10, and Team A has won, but by how many wickets? 0?


Looking for a Simple Argument for "Integral Curve Starting at A Singular Point is Constant"

Let $U$ be an open subset of $\mathbf R^n$ and $V:U\to\mathbf R^n$ be a differentiable vector field on $U$. Let $\mathbf p\in U$ be a singular point of $V$, that is, $V(\mathbf p)=\mathbf 0$.     Then the only integral curve which starts at $\mathbf p$ is the constant curve.   I know that one could simply use the theorem of "uniqueness of integral curves" and in fact adapt the same proof for this particular case.  But is anybody aware of a simple argument for this?


An Open Interval and a Half-open Interval are not Homeomorphic

As the topic, how can I prove it?     Prove that (a,b) and [a,b) in R are not homeomorphic metric space.   I'm pretty weak on this section (homeomorphism) and I don't have any clue to figure it out.  Please help me, thank you.


If $A$ and $B$ are two matrices, and $AB=I$ (of suitable order) is $BA=I$ always true?

It is said that a matrix $A$ is said to be invertible if there exists a matrix $B$ such that $AB=I=BA$, but if we only know $AB=I$, can we be sure that $BA=I$?


How do I pre-install a program on a Live CD to boot?

I would want "program.deb" to be pre-installed to a Ubuntu Live CD.


Decomposition of measure in probability measures

Let $m$ be a $\sigma$-finite measure on sigma-algebra $A$ of subsets of $X$.     How do I prove that there exist probability measures $(m_n)_{n\in \mathbb{N}}$ on $A$ and coefficients $c_n>0$ such that $$m(U)=\sum_n c_nm_n(U)?$$   I know that a $\sigma$-finite measure means that there exist subsets $(X_n)_{n\in \mathbb{N}}$ such that $X=\cup_n X_n$ and $m(X_n)<\infty$. And a probability measure is such that $m_n(X)=1$. But how can I use these to prove the statement?


How to add a background image into blender?

I'm new to blender and im trying to put an image into blender. These are the steps I'm taking:    shift A to add an image in N to bring the properties panel enable background image than chose the image I want   is there a step I'm missing? I've seen multiple questions on this but I just can't work them out I am in in orthographic view but the image doesn't show up. I want to use it so that I can make a rig and compare it


Why does a cup with 100 g water float when placed on another cup with 50 g of water?

Imagine we have cup A with 50 g of water and cup B (smaller in width than A) with 100 g of water. Now put cup B into cup A. If the width of both cups are of comparable size then the cup with 100 g of water floats. It does not touch the bottom of cup B.   Now think about  of flotation. It says that the weight of displaced liquid = weight of the floating object. However in this case the bottom cup has only 50 g of water. How can an object float without displacing water equal to its own weight? Am I not applying Archimedes principle correctly or because of both things beings of comparable size Archimedes principle does not apply?


Where's the Rainbow Jetpack gone in Jetpack Joyride?

When I first started playing Jetpack Joyride I recalled the Rainbow Jetpack, but at some point it seems to have disappeared from the store and now I can't get the Hippy Achievement.  Any idea how to get it? I thought perhaps installing an older version might still have it, but I don't have a copy in iTunes to roll back to. Has it ever come up on sale in the store?  FYI, the  doesn't seem to give any more info either.


How would I hide objects that would normally clip through eachother during animation

So, I'm creating a model where two parts would very visibly clip through each other. I had assumed there would just be some clever trick to hide this, and just worked on other parts thinking I'd find out how to hide the clipping later. Well as you can probably tell, I have yet to find a clever solution. Anything I can do or do I have to just work around it? Screenshots for clarification:


I want to block certain URLs on browsers. I don't want to block whole site. For example, I want to block , but not whole  domain. Is there any way I can do it?


$|f(z)| \leq M|z|^n$, then $f$ is a polynomial of degree $\leq n$

Let $f$ be an entire function and suppose there is a constant $M$, and an integer $n \geq 1 $ such that $|f(z)| \leq M|z|^n $ for large $|z|$. Show that $f$ is a polynomial of degree $ \leq n$.


Is it possible for reviewers to mistakenly reject a quality paper?

If I am not wrong, turbo codes was submitted to the ICC conference and rejected but accepted later on.  I want to know if there are other similar works (strong works) that were rejected at first but then accepted and considered revolutionary.


"UID" (unique identifier) - half abbreviation, half initialism. What it is?

According to Your Dictionary¹:  Abbreviations: St. for Street and Saint, Mr. for mister Acronyms: radar for radio detection and ranging Initialisms: aka for also known as, FBI for Federal Bureau of Investigation  The difference between acronymns and initialisms is that acromyms form new words, while initialisms are pronounces letter-by-letter. People who are familiar with programming, databases, or library science are well familiar with the ID abbreviation, which stands for identifier. But there is another one "thing", UID, which stands for unique identifier. It doesn't look as a pure abbreviation (because there are two words) or a pure initialism (because the first words is trimmed to two letters). So what it is? ¹


The range of the heights of the female students in a certain class is 13.2 inches, and the range of the heights of the male students in the class is 15.4 inches. Which of the following statements individually provide(s) sufficient additional information to determine the range of the heights of all the students in the class? Indicate all such statements. "A The tallest male student in the class is 5.8 inches taller than the tallest female student in the class. "B The median height of the male students in the class is 1.1 inches greater than the median height of the female students in the class. "C The average (arithmetic mean) height of the male students in the class is 4.6 inches greater than the average height of the female students in the class.  What does the term "sufficient" mean?


It has been stated several times here and probably elsewhere that the first population III stars were  to undergo H-to-He fusion via the CNO cycle as there was  at the point of the first stars forming, and they were stuck with the pp chain.   What I have a question about though is that it has been shown that  in primordial nucleosynthesis. This means there was around 10^65 carbon-12 nuclei already in existence which seems to indicate there would definitely be a non-zero probability of the CNO cycle being able to function in the earliest stars. It may have not been quite as dominant as it is today in high mass stars but it seems like it would have had an impact right from the beginning.    So how come it is still stated that the CNO cycle couldn't have happened in the earliest stars when it seems that the material needed for it was already present (granted not nearly in as high amount as it is today)?


Hypothetically you are put in math jail and the jailer says he will let you out only if you can give him 707 digits of pi. You can have a ream of paper and a couple pens, no computer, books, previous pi memorization or outside help.  What is the best formula to use? Where best will result in the least margin of error (most important) and is decently quick (second importance).  707 probably seems arbitrary, but I got it from here:   Also I don't really understand how he could use that formula because I thought you need a table to get arctan values or it would probably take a long time to make values of arctan to use in the formula, but that isn't too important.  I asked this question today because it celebrates the most accurate pi day for the next 100 years :)


How can the universe be homogeneous and isotropic while it has started with a big bang?

We assume the universe has been shaped by a explosion "Big Bang" but from what I understand explosions make the environment "not" homogeneous and "not" isotropic. If that's right how can we assume the universe is homogeneous and isotropic? or am I wrong about the meaning of homogeneous and isotropic?


Is it disadvantageous to have recommendation letters from postdoctoral fellows rather than professors?

I am a math PhD student in a US university and also a teaching assistant. This fall I’m expecting to apply for jobs. I’m looking for math lecturer/instructor jobs.   However, when I worked as a teaching assistant I did not actually teach a course. Instead, I did recitations, grading and assisting. So I cannot get teaching letters from the department. Hence, I’m thinking to get letters from the instructors that I did recitations, who are postdoctoral fellows.   Would it be disadvantageous to have recommendation letters from postdoctoral fellows rather than professors?  EDIT: I don’t consider my post to be a duplicate because that post doesn’t solve my issue. It has inconsistent answers. One answer says Professor is better, other says postdoctoral fellow is better. Thank you.


In practice, what does it mean for the Newton's method to converge quadratically (when it converges)?

I was studying about the Newton's method (and other root-finding methods) and apparently Newton's method converges quadratically (or more) when it does.     Suppose that the sequence $\{x_k \}$ converges to the number $L$. We say that this sequence converges linearly to $L$, if $\exists$ a number $\mu \in (0, 1)$, such that $$\lim_{k \to \infty} \frac{|x_{k+1} - L|}{|x_{k} - L|} = \mu$$      and $\mu$ is called the rate of convergence.        Similarly, it would converge quadratically to $L$ if       $$\lim_{k \to \infty} \frac{|x_{k+1} - L|}{|x_{k} - L|^2} = \mu$$      where $\mu > 0$.   Why is that?  How can I see in practice if a sequence of iterations of the Newton's method is converging or not quadratically?  I guess I need to check for all $x_k$ that the second limit above is $\mu$ for some $\mu$ greater than $zero$...but how would I check this practically for a real concrete example?


Are there any useful tools / techniques for creating website content inventories?

This is probably wishful thinking but here goes...  Now obviously I don't expect some magical app to crawl a website, summarise each page and detail all the assets within each page (if only!) however is there a crawler of some sort that will trawl a given website and produce a full set of links and respective hierarchy would be invaluable. That would ensure that no pages get missed out as they invariably would through a purely manual inventory.  From there I would be able to see the existing site hierarchies and taxonomy decisions that have been made when building the site, and could use this as the basis for creating a detailed website content inventory.  Whether this be an online application, script or even a useful manual technique other than just manually sitting at the site and following links would be great.


How To Spell Dates Written In Cardinal Numbers In American And British English

How do you spell the following date:  December 6 (AmE)  6 December (BrE)  Do you spell this date as 'December six' or 'December the sixth' in American English?  And in British English, do you spell it as 'Six December' or 'The sixth of December'?


Why is there no dedicated MATLAB community?


How do I debug why stderr is being suppressed?

Running some shell functions and ctrl-c-ing them leads to my stderr being suppressed, such that echo hi >&2 and echo hi > /dev/stderr print nothing. I want to debug this, but I have no idea how to start. How can I check where stderr is redirected to? Doing a exec zsh doesn't solve this problem in an affected shell, which indicates the problem is indeed with a rogue redirection.  I'm on macOS.  I tried:  ll /dev/fd crw--w---- 0,11 evar 12 May 18:32 0 crw--w---- 0,11 evar 12 May 18:32 1 crw-rw-rw-  0,2 root 12 May 18:32 2   Perhaps the issue is that /dev/fd/2 is somehow owned by root?  Update:  lsof -p $$ COMMAND   PID USER   FD   TYPE DEVICE  SIZE/OFF                NODE NAME zsh     69568 evar  cwd    DIR    1,6      1472          8624004142 /Users/evar/Base/Lectures zsh     69568 evar  txt    REG    1,6    618652          8678375637 /usr/local/Cellar/zsh/5.8/bin/zsh zsh     69568 evar  txt    REG    1,6    452676          8677805768 /usr/local/Cellar/pcre/8.44/lib/libpcre.1.dylib zsh     69568 evar  txt    REG    1,6    312924          8678370072 /usr/local/Cellar/ncurses/6.2/lib/libncursesw.6.dylib zsh     69568 evar  txt    REG    1,6    251160          8678375669 /usr/local/Cellar/zsh/5.8/lib/zsh/zle.bundle zsh     69568 evar  txt    REG    1,6    123012          8678375645 /usr/local/Cellar/zsh/5.8/lib/zsh/complete.bundle zsh     69568 evar  txt    REG    1,6     65188          8678375676 /usr/local/Cellar/zsh/5.8/lib/zsh/compctl.bundle zsh     69568 evar  txt    REG    1,6     18220          8678375661 /usr/local/Cellar/zsh/5.8/lib/zsh/terminfo.bundle zsh     69568 evar  txt    REG    1,6     27888          8678375680 /usr/local/Cellar/zsh/5.8/lib/zsh/system.bundle zsh     69568 evar  txt    REG    1,6     17240          8678375681 /usr/local/Cellar/zsh/5.8/lib/zsh/langinfo.bundle zsh     69568 evar  txt    REG    1,6     38064          8678375656 /usr/local/Cellar/zsh/5.8/lib/zsh/parameter.bundle zsh     69568 evar  txt    REG    1,6     22864          8678375674 /usr/local/Cellar/zsh/5.8/lib/zsh/pcre.bundle zsh     69568 evar  txt    REG    1,6     37588          8678375667 /usr/local/Cellar/zsh/5.8/lib/zsh/zutil.bundle zsh     69568 evar  txt    REG    1,6     62316          8678375647 /usr/local/Cellar/zsh/5.8/lib/zsh/complist.bundle zsh     69568 evar  txt    REG    1,6     22620          8678375675 /usr/local/Cellar/zsh/5.8/lib/zsh/stat.bundle zsh     69568 evar  txt    REG    1,6     29076          8678375649 /usr/local/Cellar/zsh/5.8/lib/zsh/zpty.bundle zsh     69568 evar  txt    REG    1,6     18736          8678375668 /usr/local/Cellar/zsh/5.8/lib/zsh/datetime.bundle zsh     69568 evar  txt    REG    1,6     17628          8678375660 /usr/local/Cellar/zsh/5.8/lib/zsh/zleparameter.bundle zsh     69568 evar  txt    REG    1,6     18208          8678375654 /usr/local/Cellar/zsh/5.8/lib/zsh/termcap.bundle zsh     69568 evar  txt    REG    1,6     63728          8678375662 /usr/local/Cellar/zsh/5.8/lib/zsh/computil.bundle zsh     69568 evar  txt    REG    1,6     22440          8678375673 /usr/local/Cellar/zsh/5.8/lib/zsh/sched.bundle zsh     69568 evar  txt    REG    1,6   1534352 1152921500311885154 /usr/lib/dyld zsh     69568 evar    0u   CHR  16,11   0t56261                3469 /dev/ttys011 zsh     69568 evar    1u   CHR  16,11   0t56261                3469 /dev/ttys011 zsh     69568 evar    2w   CHR    3,2 0t1314232                 314 /dev/null zsh     69568 evar   10u   CHR  16,11   0t21049                3469 /dev/ttys011 zsh     69568 evar   11u   CHR   15,9    0t9086                 583 /dev/ptmx


Why the group order has to be prime for pairing-based cryptography

I'm trying to get into pairing-based cryptography and I don't see why the group order of the group G in  the pairing function   e:G*G-> G_t   has to be a prime number.  I don't find an argument why groups of order p^k for a prime number p and some entire number k cannot be used?


Discrepancy between vote counts in Linked list and Related list

While viewing the question , I saw the "Linked" and "Related" questions lists. There is a duplicate question in both lists () but with a discrepancy in the vote counts:


Vi on Linux: show ^M line endings for DOS-format files

On Solaris, if you open a file in vi that has Windows line endings, this shows up as ^M at the end of every line.  On Linux, vi is cleverer and understands the Windows file format, and does not display ^M.  Is there a setting to make Linux vi behave the same as Solaris in this respect?  A common problem for us is copying a shell script off a (Windows) dev box and forgetting to dos2unix it, and then being confused when it doesn't work properly. On Solaris the problem is obvious as soon as you vi the file, but not on Linux.  Thanks.


Let a and b be natural, (a,b) = 1, If ab=c², There are r and r such that a = r² and b = s²

I tried using Bézout's theorem: if $(a,b) = 1$, there are $m,n$ such that $am+bn=1$, $amc+bnc=c$, but it doesn't work, I don't get good result... I know that $a\mid c²$ and $b\mid c²$.


I am new to using blender and I am working on rendering a scene that uses portal lighting, but I am having some render issues and I don't know why. Is there anything I can try to fix this issue?  Denoising didn't seem to make a difference on the picture cloudiness one way or another. Adding more samples helped a lot, but I still have that issue some.  Here's a link to my blender file   Thanks everyone, the advice was very helpful! For anyone else having this problem, try the advice below and primarily lower the number of your light sources in the scene.


Is "people" a countable or a non-countable noun?

I saw these sentences on the Internet:   There are three people here.  A few people didn't enjoy the play.    Now I'm not sure whether people and other collective nouns like team, family and police are countable nouns or uncountable nouns. Is there an explanation for how these words work?


Given $f$ holomorphic at the open unit disc and continuous at the closure of the disc and $f(e^{i\theta})=0,|\theta|\leq \frac{\pi}{2}$. Prove that $f \equiv0$ at the unit disc. My try: I  want to show that on the left semi circle $f=0$ and then i can use MMP,I thought maybe setting $g(z)=f(z)f(-z)$ and then $g(z)=0$ on the boundray and then $g\equiv=0\to f(z)=0$


How to install skype in ubuntu 16.04? Please provide step by step process for installation.


How to remove/hide the entire top panel?  I searched for it but could not find a solution. This thing is really driving my nuts. I could not even imagine that it would be so difficult.    Answers from  topic didn't help me.  This is not what I want.  wmctrl -r ":ACTIVE:" -b toggle,fullscreen  CompizConfig doesn't help too. it leaves top panel half transparent anyway.  sudo apt-get install compizconfig-settings-manager  Also can't install HideTopBar gnome extension.


"Let us wait, and she will do what we want." Are these 2 clauses both independent?

I am getting confused with this little word, and I would be very grateful to know more: I am looking on many , and they all include and in their list of coordinating conjunctions. So that is clear. I cannot find it in the list of subordinating conjunctions, but I just want to make sure Can "and" ever be a subordinating conjunction? In a sentence like  Let us wait, and she will do what we want.  am I right that "and" is a coordinating conjunction uniting two independent clauses? Edit 1: I underline that my query concerns the particular use of the conjunction "and" in a sentence with conditional meaning, and not coordinating and subordinating conjunctions in general. Edit 2: I had no doubt that "and" can connect any kind of phrases or  clauses (be they subordinate or independent), as long as they are of the same kind. My confusion began when a native speaker claimed that "and" can link an independent clause with a subordinate one. I would appreciate any insight on this.


While reviewing , I was presented with the following:    While the above screenshot is taken from the review history, when the review was presented the only difference was that it didn't have the "Accepted" checkmark.  The post was in the Low Quality Posts review queue, but it seems to be of reasonable length, contains code, an explanation, even the vote count (that might be fudged, I'm not sure).  It appears that such test reviews are way too evident that those are test reviews.  I'm not aware of what mechanism is used to present test reviews, but it's apparent that it needs some bit of overhaul.  [The review in question is


Looking for exercises for my students, I stumbled upon this series $$\sum_{n=1}^{\infty}(-1)^n\frac{1}{\sqrt{1}+\sqrt{2}+\cdots+\sqrt{n}}$$ which can be easily seen to be convergent thanks to the Leibniz Criterion. I forgot tho to put the $(-1)^n$ in the equation and started to try to solve it! Eventually I found out I missed a piece. Anyway I convinced myself that $$\sum_{n=1}^{\infty}\frac{1}{\sqrt{1}+\sqrt{2}+\cdots+\sqrt{n}}$$ should converge anyway, but am unable to prove it!  Thanks!


The equation of a parabola with vertex at the origin is given by $Ax^2+Bxy+Cy^2+Dx+Ey+F=0$ with the contraints, $B^2-4AC=0$ and $F=0$.  There exists a parametrization as follows: $$r(t)=\left(\begin{array}{cc}at^2+bt\\ct^2+dt\end{array}\right)$$ I believe this is true because Geogebra will show me the numeric parametrization going either direction.  That is, I can put in any $A,B,C,D,E$ or I can put in $a,b,c,d$ and the program will show me the other set. I just have to play by the constraint rules above.  How do I find variables $a,\;b,\;c$  and $d$?  What I have tried?   Brute force. Use a CAS and substitute $x=at^2+bt$ into the general conic form and solve for $y$.  From the mess of terms, I collected the ones where $B^2-4AC$ could be factored away thus reducing the complexity.  What remains is $$r(t)=\left(\begin{array}{cc}at^2+bt\\\frac{-B(at^2+bt)-E\pm\sqrt{(2BE-4CD)(at^2+bt)+E^2}}{2C}  \end{array}\right)$$ This is a parametrization and it will half-graph but it isn't in the correct form. The $y$ term didn't become $ct^2+dt$. I did notice in passing that the root term is somehow related to the eigenvectors.  It was elusive.   Discovery using numerical examples showed me something. In the desired parametrization let the parabola's focal point be $(f_x,f_y),$, then $a=f_x$ and $b=2f_y$ and $c=f_y$ and $d=2f_x$. I can get the focal point by rotating the graph to the vertical with $\lambda x^2+E_1y=0$ (eigenval/vec rotation method) and using $x^2=4py$ to get p and then rotating back again.     I know that "discovery" is sort of an answer to my question, but I really want to know how to derive $a,b,c,d$ rather than my didactic method for finding them.


Are there suspensions or fines for exaggerating contact or flopping to draw fouls in football (soccer)?

In professional football (soccer) matches, players often exaggerate contact or flop to draw fouls.  What actions (suspensions, fines) are soccer organizations, including FIFA or UEFA, doing to prevent this?


I need to  an object to . I'm using . Is there a "standard" way to do this?  My specific situation: I have an array defined as shown below:  var countries = new Array(); countries[0] = 'ga'; countries[1] = 'cd'; ...   and I need to turn this into a string to pass to  like this:  $.ajax({     type: "POST",     url: "Concessions.aspx/GetConcessions",     data: "{'countries':['ga','cd']}", ...


Which one is the right expression? Assuming that this friend is still great today. And for some reason, I regret not telling you earlier about it.  1) I should have told you you are a great friend.  2) I should have told you you were a great friend.  Thank you!


A bird flies between two cars infinite times

The following question and answer is taken from   A naughty bird is sitting on top of the car. It sees another car approaching it at a distance of 12 km. The speed of the two cars is 60 kmph each. The bird starts flying from the first car and moves towards the second car,reaches the second car and come back to the first car and so on. If the speed at which bird flies is 120kmph then 1)the total distance travelled by the bird before the crash is? 2)the total distance travelled by the bird before it reaches the second car for the second time is? 3)the total number of times that the bird reaches the bonnet of the second car is(theoretically)?  I am clear with the explanation available in the mentioned site for 1 and 2.  For the third part, i.e., the total number of times that the bird reaches the bonnet of the second car is(theoretically), answer given is infinite times with the explanation proving the infinite sequence.  But we know it cannot go on infinite times. It has to be a finite number if we look at it practically. How to explain this? I am puzzled because the explanation looks convincing (infinite times) whereas we know it cannot be infinite times. Please help in understanding this contradiction. EDIT: Adding the explanation(below) from  as advised by @DylanSp for clarify and my aim is to understand why it looks as infinite times(theoretically) whereas we know it is finite practically or where my understanding is wrong. (it was a detailed explanation and that is why I have not added initially)  (3) infinite times As explained for the previous case, The bird reaches the second car in $\dfrac{12}{180}=\dfrac{1}{15}$ hour for the first time. In this time, the cars together covers a distance of $\dfrac{1}{15}×120=8$ km and therefore the distance between the cars becomes 12-8=4 km. The bird reaches back the first car in $\dfrac{4}{180}=\dfrac{1}{45}$ hour. In this time, the cars together covers a distance of $\dfrac{1}{45}×120=\dfrac{8}{3}$ km and therefore the distance between the cars becomes $4-\dfrac{8}{3}=\dfrac{4}{3}$ km. Now the bird flies to the second car for the second time. It takes $\dfrac{\left(\dfrac{4}{3}\right)}{180}=\dfrac{1}{135}$ hour for this. In this time, the cars together covers a distance of $\dfrac{1}{135}×120=\dfrac{8}{ 9}$ km and therefore the distance between the cars becomes $\dfrac{4}{3}-\dfrac{8}{9}=\dfrac{4}{9}$ km. The bird reaches back the first car in $\dfrac{\left(\dfrac{4}{9}\right)}{180}=\dfrac{1}{405}$ hour. In this time, the cars together covers a distance of $\dfrac{1}{405}×120=\dfrac{8}{ 27}$ km and therefore the distance between the cars becomes  $\dfrac{4}{9}-\dfrac{8}{27}=\dfrac{4}{27}$ km. Now the bird flies to the second car for the third time. It takes $\dfrac{\left(\dfrac{4}{27}\right)}{180}=\dfrac{1}{1215}$  hour for this. so on. Sine this goes on repeatedly, the bird reaches the bonnet of the second car infinite times(theoretically)


Do physicists need the idea of 'cause' or 'causation' to do physics?   Does it appear in physics, either in theory, answered , or in experiment? In a way analogous to how names and mathematics do.  If not, then it seems like a folk concept which exists only to help us learn physics or be inspired by it.


How to stop Gnome from reordering keyboard layouts?

I am using 3 keyboard layouts (to be exact: English, , Russian). On Unity, when I pressed my "next layout" keybinding, layouts whould only be smitched in the order set in the settings window (English - Latex - Russian - English again...).  On Gnome, the story is completely different: it looks like it switches them in order of usage, like this:   Was on Russian, switched to English. Press keybinding -- back to Russian. Press again -- back to English. Press twice in a row -- Latex! Press once more -- English. Once more -- Latex! Twice -- Russian. Once more -- back to Latex.   If you have only two layouts you will never see a difference.  It's pretty obvious to me that these reorderings require some logic to be implemented, but I would like to turn that off and "freeze" the order. Is there a way, though?


Can you please let me know which of the following sentences is correct? 1 Because of this reason the Auckland is having greater productivity. 2 Because of this reason Auckland is having greater productivity.


I have the following problem:  Let $X_1,..., X_n$ be a sample of independent, identically distributed random variables, with density $$f_{\theta}(x)=\begin{cases} e^{\theta-x}, & \text{if } x\geq \theta\\ 0, & \text{elsewhere}\\ \end{cases}$$  Let $\hat\theta_n$ be the maximum-likelihood estimator (MLE) of $\theta$. I am asked to find the asymptotic distribution of $\sqrt n (\hat\theta_n-\theta)$ and $\hat\theta_n$ efficiency. I will have to prove later that the asymptotic distribution of $ n(\hat\theta_n-\theta)$ is $Exp(1)$, but if I have the first part I think I will able to figure it out.  So far, I computed the MLE, which is $\hat\theta_n=min\{x_i\}$, for $i=0,...,n.$, and the pdf of this MLE is $ne^{n(\theta-x)}$.  Any hints or solutions would be appreciated.


Is it okay to use the same footnote with exact same words in two different chapters of a thesis?

Can I use the same footnote with exact same words in two different chapters? The ibid. is used in case of a repetition of the footnote exact above. But what if I want to use the same footnote in different chapters.


fetching tables name from database by query in php file

Blockquote   sir i want to fetch all the table's name and information about all table as total no. of field etc  with the help of single query in php file .i am using phpmyadmin as mysql please tell me how can i do it.  thanks


Is it safe to combine base64_encode and has hmac sha512 to encrypt passwords?

I'm trying to use base64 and hash_hmac sha512 to hash the passwords and works fine but I'm wonder if this is secure. I read a lot of almost same question and its seems to be to old.  This for a Website, all this is based on php also the password is storing in the database SQL.  Here is how I hash the password  $htmlTageC = "User pass"; $hash = password_hash(base64_encode(hash_hmac("sha512", $htmlTageC, true)), PASSWORD_DEFAULT); #save in to DB   And here is how I compare the hash  $hash = base64_encode(hash_hmac("sha512", $password, true)); if (password_verify($hash, $rowsSesion['pass'])) { }   So like I said This works fine on my test but I'm not sure if this is secure or should I try something else.


I'm receiving data from the port.  This data has date and time.But not formatted.  Example:  '02012019', '090253'   I want to save it to the database and I want to convert this format.  02-01-2019   09:02:53   Is there a function for this? Or is it a problem if I write? It will run 200 times in 5 seconds.  Anybody have a suggestion?


Let $f:(a,\infty)\rightarrow \mathbb{R}$ be a function such that $f$ is bounded in any finite interval $(a,b]$. Prove that $\lim_{x \to \infty} f(x)/x=\lim_{x \to \infty}[f(x+1)-f(x)]$, provided that the right limit exists. Thanks a lot.


I want to dual boot Windows 7 and Ubuntu on my PC, but I think I need a little help since this is the first time I do any dual booting. I'm following the instructions from   My Computer Specs:    Windows 7 Home Premium 64-bit Intel Pentium Dual Core 2.00Ghz 320GB HDD (200GB Free) 4GB RAM   Which version of Ubuntu should I download? will it really work? any other help will be appreciated. Thanks!


How does one show that there is no unbiased estimator of $\lambda^{-1}$ for a Poisson distribution with mean $\lambda$?

Suppose that $ X_{0},X_{1},\ldots,X_{n} $ are i.i.d. random variables that follow the Poisson distribution with mean $ \lambda $. How can I prove that there is no unbiased estimator of the quantity $ \dfrac{1}{\lambda} $?


I am migrating my workflow to ubuntu from windows. I have a macbook pro at home and I really enjoy being able to use the workspaces feature on ubuntu to increase my productivity. As myself being someone that isn't very familiar with doing command line things and hasn't worked with linux a whole lot other than doing basic commands like cd, ls, rm, screen, and sudo. I was wondering what you think would be the best choice for a ubuntu version. I am looking for ease of use as well as stability. I spend most of my time working with eclipse, as well as writing documents.  On a side note, right now I have a pretty high end workstation, but I am using a crappy notebook 2.5 inch 1TB hard drive for my system. Would it be worth it to switch to a top of the line SSD, or would the difference not really be noticeable? How difficult would it be for a newcommer to setup the system with the os and important folders running on a SSD and then other folders for storage running on a HD.


What is the difference between my codes?

I usually create a object like these:  List<Student> students= new List<Student>();   but when I install the resharper in vs2012,it suggest me to create a object like these:  var students= new List<Student>();   I wonder whether they have the same effect.I think they have the same effect.Will it be better when I use var？


Black screen instead of login screen. Ubuntu 16.04

I have Ubuntu 16.04 alongside with Windows 10. The problem is that after I choose Ubuntu in GRUB such a sequence follows:  Purple screen Screen shut down Black screen, but turned on  I can't see the login screen but I can hear a specific login sound.  Such a situation happens in around 70%. Sometimes Ubuntu boots normally to login screen. What is more, after I switch Ubuntu into "stand-by" mode, when I try to mąkę it work again, similar things happen, the screen is completelly black, but on. How can I solve this problem?  My graphic card is Intel.


Tkinter Python Window Crashing When Slider Updated

Hi guys just wondering if anyone could give me some assistance. Trying to make a python script to control a greenhouse with a raspberry pi, still in early stages at the moment.   Problem is i need a certain section of code to loop so it continually keeps the correct temp, etc i want this to occur as long as a variable is equal to 1 this is controlled by a GUI button (and works fine). Just as a test i got the code to print the temprature (value) from the slider but when its changed the Tkinter window crashes (Not Responding). Anyone know the reason or have a fix.  Entire Code:#  from tkinter import * root = Tk() import time  #--------------------VARIABLES--------------------# ManOverideToggleINT = 0 AUTOMODETOGGLESTATEINT = 0 #------------------TKINTER SETUP------------------# root.title("GREENHOUSE CONTROL - GUI") root.geometry('800x480') #root.attributes('-fullscreen', True) #MAKE IT FULL SCREEN UN-COMMENT WHEN CODE DONE   #---------------CONTROLS AUTO MODE----------------# """ This function will control the greenhouse when manual overide in not engaged (==1), monitor temp, humidity, etc.  MORE RESEARCH NEEDED ON PLANTS NEEDS """ def AUTO():     global AUTOMODETOGGLESTATEINT     while AUTOMODETOGGLESTATEINT == 0:         print(CONSTEMP.get())         time.sleep(5)         """ ############## GPIO PINS NEEDED INPUTS/OUTPUTS ##############          COOLING IF TOO WARM          if (realtemp>CONSTEMP.get()):             print("Cooling activated" + realtemp + " > " CONSTEMP.get() + " (desired)")         COOLING OFF IF TOO WARM          elif (realtemp<CONSTEMP.get()):             print("Cooling deactivted" + realtemp + " < " CONSTEMP.get() + " (desired)")         """         print("AUTO LOOP HERE") #--------------CONTROLS MANUAL MODE---------------# """ Manual mode will allows the user to specify specific conditions inside the green house """ def MANUAL():     global AUTOMODETOGGLESTATEINT     if AUTOMODETOGGLESTATEINT == 1:         print("AUTO REGULATION HAS BEEN TURNED OFF")         print("LOOP UNTILL BACK ON")  #def ToggleWait():   def AUTOMODETOGGLE():     global AUTOMODETOGGLESTATEINT     if AUTOMODETOGGLESTATEINT == 0:         print("Auto Mode OFF")         TOGGLE["text"] = "AUTO REGULATION = OFF"         AUTOMODETOGGLESTATEINT = 1         MANUAL()     else:         print("AUTO REGULATION = ON")         TOGGLE["text"] = "AUTO REGULATION = ON"         AUTOMODETOGGLESTATEINT = 0         AUTO()   TOGGLE = Button(root, text="AUTO REGULATION = ON", command=AUTOMODETOGGLE) TOGGLE.pack() CONSTEMP = Scale(root, orient=HORIZONTAL, length=300, width=50,from_=10,to=40,tickinterval=5,)#25c is optinum CONSTEMP.pack()  root.mainloop()


WiFi Hotspot - using external DHCP server

I've got an iMac set up to share it's wired network connection via WiFi. My MacBook connects to this fine, and is assigned an IP address via DHCP.  However, I'd like to use the MacBook as if it was directly connected to the same network as the iMac. Some addresses on the network do not resolve, and this appears to be because the MacBook is on a different subnet. I'm guessing this is because it's using the iMac as a DHCP server.  Is there a way to have the MacBook share the iMac's network connection, BUT with the MacBook using the same DHCP server as the iMac?  I'd like to avoid manually specifying an IP and subnet.


Why some badges can't be chosen as the "next badge"?

I can't find some badges e.g. unsung hero or famous question for the next badge option. Why?   The screenshot pictures an empty search result for the unsung hero badge:


I noticed that in many documents you encounter $f: X \to Y$ instead of $f \colon X \to Y$. Another example are quantified expressions: $\forall x: P (x)$ versus $\forall x \colon P(x)$. I find the \colon visually more pleasing, however I sometimes think I seem to be the only one, given the overwhelming amount of documents that seem to use :. Is there a rule of thumb to decide where you should use either \colon or :?


Why are questions with poor grammar and/or asked by new users down voted so hard?

This might not be the regular trend but every now or then I see a new user asking a question (that does not fit the Stack Exchange question format) and is downvoted heavily. I'm just trying to understand why and if possible anything can be done instead. I know of a couple of people who essentially make throwaway accounts to ask questions because they don't know how to format their questions and get downvoted for it.


Can I send money to my friend's Steam wallet?

I would like to send someone who already has a Steam account a money gift so that he can buy himself some games.  Is this possible? If so, how?


Software for drawing bayesian networks (graphical models)

I am searching for [free] software that can produce nice looking graphical models, e.g.     Any suggestions would be appreciated.


How do I completely remove Ubuntu/Grub and replace it with the Windows 7 bootloader?

I installed Ubuntu successfully by using acpi=off and nolapic. When I booted into the installed operating system, all that the screen showed was several multi colored bars (This must have been my 10,000th installation attempt.)  I decided to get rid of Ubuntu by simply deleting the partition and re-partitioning it as a blank drive. This caused an error on boot.  error: unknown filesystem. grub rescue>   I reinstalled Ubuntu so I could get Grub working again and boot into Windows 7, but I want grub and Ubuntu gone for good.  I am running the MSI GT683DX with   IntelCore i7-2670QM NVIDIA GTX 570m / 1.5 GDDR5 750GB HDD 7200 RPM 12GB of DDR3 RAM   I also ran the Windows startup repair tool several times. I cannot access my full Ubuntu installation (Although I can get to a terminal through live USB I would prefer to just solve this in Windows).  I tried to run sudo apt-get install boot-info-script but I get  $ sudo apt-get install boot-info-script Reading package lists... Done Building dependency tree        Reading state information... Done E: Unable to locate package boot-info-script     $ sudo fdisk -l Disk /dev/sda: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x9401091d     Device Boot      Start         End      Blocks   Id  System /dev/sda1            2048    23207935    11602944   27  Hidden NTFS WinRE /dev/sda2   *    23207936    23412735      102400   27  Hidden NTFS WinRE /dev/sda3        23412736   888453119   432520192    7  HPFS/NTFS/exFAT /dev/sda4      1449523198  1465147391     7812097    5  Extended Partition 4 does not start on physical sector boundary. /dev/sda5      1449523200  1465147391     7812096   83  Linux  Disk /dev/sdb: 16.0 GB, 16008609792 bytes 255 heads, 63 sectors/track, 1946 cylinders, total 31266816 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000     Device Boot      Start         End      Blocks   Id  System /dev/sdb1   *          32    31266815    15633392    c  W95 FAT32 (LBA)   Partition 4 is 276gb of unallocated space. sda5 is obviously the ubuntu installation. I did not use a swap space partition because I only installed ubuntu so I could boot into windows.  sda1 is the recovery I believe.


Do I add negative ability modifiers to skills?

I'm a new GM and am running a game with new players. I'm helping them make first-level characters. One player's bard has a −1 wisdom modifier and proficiency in perception (a wisdom-based skill). At first level, her proficiency bonus is +2. Does she have a +1 perception bonus or should I ignore the negative and give her +2 because she is proficient in that skill?


How to install Oracle 11gR2 on Ubuntu 14.04?

Please provide me with the guidance to install oracle 11gr2 on Ubuntu 14.04.


How to render a scene with Cycles render and blender internal

My problem is that I have made a in Blender render a plane with grass texture and I have made some rocks in a separate blender file with Cycles render. The problem is that when I do BR then it renders only the plane and the rocks are plain grey and when I do CR then the plane is grey but the rocks are looking good. Hopefully somebody can help me quick how to solve this issue  The video I used to do the rocks:


Can a conductor run out of electrons to cancel external electric fields?

We have studied so far that electric field inside a conductor if no charge is placed inside is zero. But we know that every conductor has only a limited number of electrons.  What happens when ALL the electrons have aligned to cancel the field inside conductor under application of external field and then we increase the field a little bit more certainly there are no more electrons to cancel the field and this additional field must be present inside the conductor now.  I know that practically under electric fields of magnitude that can drag out all electrons from the conductor's body to surface field emission and/or electrical breakdown would be taking place, But is this phenomenon theoretically possible ?


Do you need a visa to transit Abu Dhabi airport?

I'm flying Etihad Airways to Melbourne and I've a 14 hours layover at Abu Dhabi.  Some say that as long as you are inside the airport terminal you don't require a transit visa while some say you need a transit visa if your layover is more than 10 hours.  Can I stay inside the airport without a transit visa?


node[midway] : I don't understand this behaviour

I'd like to do a drawing for a recursive sequence :  \documentclass{article}  \usepackage{tikz}  \begin{document} \begin{center}   \begin{tikzpicture}[rectangle, rounded corners=2pt, minimum     width=1cm, minimum height=0.6cm, >=latex]     \node[draw] (u0) at (0,0) {$u_0$};     \node[draw] (u1) at (3,0) {$u_1=f(u_0)$};     \draw[->] (u0) to[bend right=50] (u1) node[midway, below]{$f$};     \node[draw] (u2) at (6,0) {$u_2=f(u_1)$};     \draw[->] (u1) to[bend right=40] (u2) node[midway, below]{$f$};   \end{tikzpicture} \end{center} \end{document}   But I get all the "$f$" labels below the (u0) node.  Can someone explain what I am doing wrong ?  Thanks.


Integration $I_n=\int _0^{\pi }\sin^{2n}\theta d\theta $

If $I_n=\int _0^{\pi }\sin^{2n}\theta \:d\theta $, show that $I_n=\frac{\left(2n-1\right)}{2n}I_{n-1}$, and hence $I_n=\frac{\left(2n\right)!}{\left(2^nn!\right)2}\pi $  Hence calculate $\int _0^{\pi }\:\sin^4t\cos^6t\:dt$  I knew how to prove that $I_n=\frac{\left(2n-1\right)}{2n}I_{n-1}$, but I am not very good at English, what does it mean Hence $I_n=\frac{\left(2n\right)!}{\left(2^nn!\right)2}\pi $ do we need to prove this part as well or is it just a hint to use? and for the other calculation to find $\int _0^{\pi }\:\sin^4t\cos^6t\:dt$ is there something in the first part that I can do to help me solve this question because otherwise it becomes very long and it's part of the question.


I tried to put some thai sings into a utf8 (utf8_general_ci) mysql database. The data is from the facebook api. In the JSON it looks like \u0e41\u0e15\u0e07\u0e08\u0e49 (original: แตแจ้) and in the database i got some ???? (question marks).  What is the best solution to save this characters into a database?  This is my database connection with mysqli:  $DB = new mysqli('localhost', 'XXX', 'XXXXXX', 'XXXX'); $DB->query("SET CHARACTER SET 'UTF8'"); $DB->set_charset("UTF8");