Can not sign up to "Super User" with existing Stack Exchange Account?

I have an account in Stack Overflow and several other Stack Exchange sites. Originally, my account was tied to my Facebook account but not anymore.   I am trying to log in/sign up to , but both log in/sign up pages only offer the option to use an existing Google+/Facebook account, or alternatively Wordpress, openID, etc.  Usually, when I sign up to a new Stack Exchange site, I am given the option to use my existing Stack Exchange account, but not with Super User.    I tried accessing the Stack Exchange site, and in my profile page, under "accounts" I can see Super User. However, when I click to go to that site, the top bar shows the "log in" button instead of my name/avatar.  What is going on?  EDIT: Of course, there is also the option to enter my e-mail address and password, which I ended up doing, and I could finally log into my (existing) Super User account.


Cross-referencing pictures - show picture not its caption

I have Picture X.Y:Photo1 and I am using  \label{pic:Photo1}   and   \ref{pic:Photo1}   to reference it. The outcome is something like: ...which you can see in picture X.Y. When I click on X.Y it is supposed to display the Photo1, but there is only its caption on top of the displayed part of page and I have to scroll a bit to see the picture itself. I want the picture to be shown right after clicking on the reference. Is there a way to do this? Thanks in advance.


Automatic bounty not awarded to an accepted answer

According to the current  (November 2020):  How is a bounty awarded? ... If you do not award your bounty within 7 days (plus the grace period), the highest voted answer created after the bounty started with a minimum score of 2 will be awarded half the bounty amount (or the full amount, if the answer is also accepted). If two or more eligible answers have the same score (their scores are tied), the oldest answer is chosen. If there's no answer meeting those criteria, no bounty is awarded to anyone.  my accepted answer in this question  should have been awarded the bounty but it did not. As you can see in the  the bounty started by the question author at Oct 28 03:23 2 minutes after accepting my answer at Oct 28 03:21. And today after the grace period has ended, the system did not automatically awared any of the bounty, not even the half (200 out off 400 bounty) on a 6 times upvoted answer with the message "Bounty Ended with no winning answer by Community♦". I've got automatic bounties in the past and I know it's working, so, I'd like to know what I'm missing here and what case did this Q/A hit and didn't get any bounty automatically awarded.


Line: 6, Column: 1 : CPU time limit exceeded

List<Integer> intList = new List<Integer>(); intList.add(11); intList.add(12); intList.add(13); intList.add(14); while(intList.iterator().hasNext()){  }   why is the CPU time limit exceeding here ?


Select and Display 'Suggested Tags' for All Posts Based on Related Questions (or other logic)

Tags should be suggested based on related questions When you start typing a title, you get a bunch of related questions:  When you click in the tag space however, you don't get any suggestions (save on meta):  Now if you are working within a programming framework, this works great. You say, "My question is about !" and you're off to the races. But what if you're on a site which doesn't fit in to default frameworks quite so nicely?  What the heck am I supposed to tag my question with?  What I'm currently doing (trying to get hired! errrr, ) My job title/source of my problem () My industry ()  (the suggestions for SO are a much more helpful , , ) Can't we give the user a bit better context? We already have the related questions being displayed, and those questions have tags, right?  Wouldn't it be absolutely awesome if you clicked in the tag box, and based on the related questions it gives you some suggestions even before typing based on the related questions to what you're asking? You know, something like this:  This would make it easier for many of the not-so-easily-classified sites in the SE network to save time on tag cleanup and make it easier for users to find related questions, and to tag appropriately. It is such a simple and obvious improvement, it doesn't even need freehand red circles on it! For reasons unknown, something similar to this is already implemented for Meta. For instance this is what it shows me for this post:  I have no idea how these are decided, but they aren't appearing on SE or on TW for me, only Meta SO. TL;DR Suggest tags. I don't care if you ignore the methods or design suggested above. At the end of the day, suggest tags to new users and make SE just a wee bit more civilized.


I hope someone here can help me out. So, I'm switching from zbrush to blender because of licensing issues and I'm having a bit of a problem with simple sculpting work. I already increased the resolution of my model with the multi res modifier and tried different types of dynamic topology modes but I always get weird artifacts with most brushes ( see image below) Does anyone know what the problem is and what I can do to fix it? Thanks in advance!


#include<iostream> using namespace std;  class A  {    int a;    int b;    public:    void eat()    {       cout<<"A::eat()"<<endl;    } };  class B: public A {    public:    void eat()    {        cout<<"B::eat()"<<endl;     }  };  class C: public A {     public:    void eat()     {        cout<<"C::eat()"<<endl;     }  };  class D: public B, C {  };  int foo(A *ptr) {  ptr->eat();  } main() {  D obj; foo(&(obj.B)); //error. How do i call with D's B part.  }   The above foo call is a compile time error.  I want to call foo with obj's B part without using virtual inheritance. How do i do that.   Also, in case of virtual inheritance, why the offset information need to be stored in the vtable. This can be determined at the compile time itself. In the above case, if we pass foo with D's object, at compile time only we can calculate the offset of D's A part.


Source: If $f \in L^2$ , then $\hat{f} \in L^2$ and $2\pi ||f||_{L^2} = ||\hat{f}||_{L^2}$, where $\hat{f}$ is the fourier transform

This claim turned up in one of my lectures, but there was no proof or source for it given (We don't have a textbook for this course). Does anyone have anymore information on this theorem, or an idea where I can learn more about it?   EDIT: Looking at the Wiki article, they say that the following holds $${\displaystyle \int _{-\infty }^{\infty }\|f(x)\|^{2}\,dx=\int _{-\infty }^{\infty }\|{\widehat {f}}(\xi )\|^{2}\,d\xi }$$  but then go on to say      A more precise formulation is that if a function is in both L1(R) and   L2(R), then its Fourier transform is in L2(R)   What do they mean, "both in $L^2$ and $L^1$" ? The above formula clearly states that if the left side is finite, ie $f$ is in $L^2$, then the right side is finite, ie $\hat{f}$ is in $L^2 $?  EDIT2: I think I get it, it is becuse they have defined the Fourier transform to only be applicable to $L_1$ functions, so they RHS might not exist if $f$ is not in $L_1$


Is this the correct intuition behind the covariant derivative? If not can you please show me how to covariant derivative is related to the directional derivative?  The covariant derivative can be thought of as a generalisation of the directional derivative to non Euclidean spaces. The directional derivative is a mapping which takes as input some tangent vector at a point $p\in \mathbb{R}^n$ and a scalar field $f(x^1, x^2,....,x^n)$ and returns a real number. Since we are working in $\mathbb{R}^n$ we can acknowledge that there exists a map $F: \mathbb{R}^n \to \mathbb{R}^n$ which is to be considered a vector field. Due to the geometry of $\mathbb{R}^n$ we can think of points as vectors and vectors as points and hence the directional derivative acting on scalar fields can naturally be thought of as acting on vector fields. However for a general manifold M, the notion of a derivative acting on vector fields does not arise naturally from that of a derivative which acts on functions, the reason being that we cannot assign to each point $p\in M$ a 'tangent vector in $M$' due to the fact that a vector field in one coordinate chart will not be consistent with a vector field in some other chart. In general the basis of tangent space at $p\in M$ is different to that of $q\in M$, a connection provides a way of relating the two tangent spaces in such a way that permits vector fields to be differentiated in a way that is consistent with notion of the directional derivative on $\mathbb{R}^n$.


What happened for them to ban Apparition in Hogwarts?

In the new trailer for the new Fantastic Beasts film, it shows people apparating into Hogwarts yet apparition is banned on the Howarts grounds, so I was wondering if anyone knew why it got banned or what happened?


How to move multiple folders to another directory?

How can I move multiple folders into another directory ? For example, I would like to move the folder 000/ 001/ 002/ to train/000/ train/002 train/003. Is there a simple command that I can use like  mv --from 000/ 001/ 002/ --to train/000/ train/002 train/003


How to enable Play Store auto-update for just a few apps?

As the title says, I'd like to enable auto-update for trusted apps (e.g. Google apps), but if I open the app in Play Store and check Auto-update, I get the question "Auto-update is currently disabled for all apps. Do you want to enable it? You can always change this in Settings. Data charges may apply." Now, if I select Yes, auto-update is turned on for all apps and I have to deselect each one separately.  What I'm looking for is a way to enable auto-update, deselect all apps from auto-update and manually select which apps are allowed to auto-update (i.e. opt-in instead of opt-out).  Running stock 4.2.2 on Sony Xperia Z. I haven't rooted the device so solutions without root are preferred.  EDIT: The situation turned even worse. Now, if I have several apps waiting to be upgraded and I select Update all, I get a popup for each and every app asking "Auto-update has been disabled for [app], are you sure you want to update?". Seems like we're being driven to enable auto-update for all apps, and I don't like it.


I commented on my friend post and the friend replied "Your Point Being?". But I didn't understand the meaning of "Your Point Being?". What is the meaning of "Your Point Being?".


Possibility of making dark energy equivalent with dark matter

I was curious whether it is possible to make dark energy equivalent to dark matter.   Can this unification be done?  If it can, why do scientists prefer to separate dark energy from dark matter?


Differentiable approximation of the absolute value function

Are there any good approximations of the absolute value function which are $C^2$ or at least $C^1$? I've thought about working with exponentials and then adding in more terms to keep the function from growing too fast away from zero, but I was hoping to find something a bit neater.


"forced to make due with"  I don't know it doesn't sound right to me, is it grammatically correct?


Show that $\{e_{n}\}_{n=0}^{\infty}$ is a Schauder basis of $(c,\|\cdot\|_{\infty})$ under the . Here, $c$ is the collection of all convergent sequences. Also, let $e_{0} = \{1,1,1,\ldots\}$ and $e_{n} = \{0,0,\ldots,1,0,\ldots\}$ where the $1$ is in the $n$th position.    The fact that $e_{0}$ is defined this way is a source of confusion for me. Starting with the typical arguments for a Schauder basis proof, I can't find a way to reconcile this.   Does anyone have any insight into this proof?


Display error message if same record exist with combination of some fields?

I have taken three fields from case object called AccountName, IntegrationTo__c and SfType__c (checkbox).  I have created one case record with a specific combination of three fields.  For the second time I create a record with that combination, then  display error message only if SfType__c is true in first record otherwise allow  for record creation.  trigger AvoidDuplicate on Case(before insert)  {          set<string> newNameSet = new set<string>();     newNameSet = new set<string>();      set<string> newEmailSet = new set<string>();      set<string> dbNameSet = new set<string>();      set<string> dbEmailSet = new set<string>();      for(Case newLead : trigger.new){          newNameSet.add(newLead.Account.Name);          newEmailSet.add(newLead.IntegrationTo__c);      }      for(Case dbLead : [select id, Case.Account.Name, IntegrationTo__c from Case where IntegrationTo__c IN: newEmailSet OR Case.Account.Name IN: newNameSet]){          dbNameSet.add(dbLead.Account.Name);          dbEmailSet.add(dbLead.IntegrationTo__c);      }      for(Case newLead : trigger.new){          if(dbNameSet.contains(newLead.Account.Name) && dbEmailSet.Contains(newLead.IntegrationTo__c))              newLead.addError('You are inserting Duplicate Case');      }  }   i wrote this this not checking the account field name and integration__c values only with combination of account and integration__c shows error


Let $X$ be a normed space and $Y$ be a finite dimensional subspace of $X$. Show that there is a projective $P\in B(X)$ such that $Im P=Y$. Hint: First Solve for $dimY=1$ then generalize the solution for any finite dimensioanl spaces. Here since $Y$is  finite dimensional subspace of a normed space so it is closed. However we are not given that $X$ is banach, so we cannot use any theorem about projective in banach spaces!. **The question stated in  is not quite the same, I think. Can someone, suggest a way to solve the question using the hint.


What is this flicker I get while tracking a camera?

After having my camera tracked, I decided to put in a cube for testing. But then I've noticed this strange artifact where every object kinda flickers and changes it's rotation.


The following infinite sums produce remarkable results.  $1+2+3+4+...=-\frac{1}{12}$   $1-2+3-4 +...=\frac{1}{4}$   So how are these results compatible with the statement; that integers are closed under addition? Analysis and algebra seem to disagree here.      Is this some sort of abuse of notation?   Is this an example of inconsistent statements under the logicians meaning of the word inconsistent?    And are there any other examples of seemingly contradictory statements from history or presently?  Note. I'm not asking for a proof of the results.


How should I handle questions which are answered in the comments?

Sometimes I have asked a question which got no answers, but is answered in the comments to the question.  How should I handle these questions? I can't accept an answer, so it is never an accepted question.  For example this one:   (ok here the answer in the comments is from me, but nevertheless I also have others of them)


SPF softfail even when set seemingly correctly

I have my own postfix server, that serves only as a forwarding mail server, i.e. if you send email at admin@mydomain.com, it will arrive into my gmail/whatever else.  My SPF looks as such:  v=spf1 ip4:<IP HERE> a:<DOMAIN HERE> include:_spf.google.com -all   I have verified that when I'm sending emails, they come from ip in the ip4 part:  Received-SPF: SoftFail (protection.outlook.com: domain of transitioning gmail.com discourages use of <SAME_IP_AS_IN_SPF> as permitted sender) Received: from <DOMAIN_FROM_SPF> (<IP_FROM_SPF>) by ...   Gmail won't even put the email into junk - it just never appears in my mailbox anywhere. Their  though marks SPF as ok (though I assume that tool is if I want to relay to the gmail server and they'll send it for me - is the include:_spf.google.com useless in my case? I just want to forward emails from people to my personal address).  In outlook then, the mail is marked as junk. Any idea of what's wrong both with SPF and marking the mail as junk? I also have reverse dns so that my hostname can be resolved to the same ip as above. According to this  tool, my SPF should pass as well.


I have joined my first open source project, and with these projects, obviously come packages containing modules.   Before I delve in, this is the file structure of the project:  -Opensource-Project     -README.md     -main.py     -modules         -__init__.py         -src             -lyrics.py         -tests             -test_lyrics.py   Now inside of test_lyrics.py:  import modules  def test_lyrics():     assert('lyrics' == modules.process_query('paradise lyrics')[0])   When I run this file, I get:  ImportError: No module named modules   I have done research, and have found many past questions suggesting this:  export PYTHONPATH="${PYTHONPATH}:/home/Opensource-Project/modules"   Now, I do this, because this is where the highest level init.py is, in the modules directory.   On top of that when I run:  >>import os >>os.environ["PYTHONPATH"]   It returns   >>:/home/Opensource-Project/modules   And yes, it just remains the variable for the session; once I close the terminal, it is gone.   Lastly, I check .bashrc and .profile, and it is not included in there.   What can I do to permanently add this path for the project and have python recognize these packages? Keep in mind, I am new to professional software development.   Thanks


What force causes massive objects to bend space?

The visualization of gravity as shown by  is pretty good at explaining how massive objects bend space, and such bending causes objects around it to fall towards it (a.k.a: gravity).  However, here's what I do not understand. The reason why the experiment in the video works in the first place, is because real gravity -the one in that room- is acting on the marvels and causing those marvels to bend the sheet. In the real world, there must be a force that causes massive objects to bend space in the first place. What is that force?  To put my question in a simple set of equations:  Experiment: Marvel + Sheet + Real Gravity = Sheet Bending (Fake Gravity).  Real World: Planet + Space + (?) = Space Bending (Real Gravity).  There are other questions about this on StackExchange, but they don't seem to address the missing variable in the equations above.


Cannot detect a lan device on my network

I have a Huawei WiFi router that has 4 ethernet ports. I have connected one of those to my laptop and connected another to device via an ethernet cable (RFID reader). I run the software Advanced IP scanner to scan all the devices on my network. But the connected device (RFID reader) fails to be detected by the software. The RFID reader is powered.   Can someone please explain to me why this frustrating network RFID reader fails to pick up on the software. As mentioned in my other post I want to know the IP address of the reader?


Can you calculate unix timestamps (universal clock) from any planet?

Given the definition of unix timestamp as the number of seconds elapsed since January 1st, 1970 as GMT+0, without leap seconds, is it possible to create a universal clock that will generate the correct timestamp?  Is the current definition of a second      the duration of 9192631770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom.[1] In 1997 CIPM added that the periods would be defined for a caesium atom at rest, and approaching the theoretical temperature of absolute zero (0 K), and in 1999, it included corrections from ambient radiation.[1] Absolute zero implies no movement, and therefore zero external radiation effects (i.e., zero local electric and magnetic fields).   sufficient for this?


The use of "used to" is much more frequent than "use to", but what about "did used to" vs. "did use to"?


Quantum Field Theory from a mathematical point of view

I'm a student of mathematics with not much background in physics. I'm interested in learning Quantum field theory from a mathematical point of view.  Are there any good books or other reference material which can help in learning about quantum field theory? What areas of mathematics should I be familiar with before reading about Quantum field theory?


How does the Dragon's "Solitary Shapeshifter" characteristic work?

On MM 103, the following characteristic can be found:     Solitary Shapeshifters. At some point in their long lives, metallic   dragons gain the magical ability to assume the forms of humanoids and   beasts...   The text seems really ambiguous, and there are a few things I'd like to understand about it:   How does one determine the stats of its alternate form? Can it have more than one alternative form? How long does the transformation take? Can it do this in combat? Can chromatic dragons do this as well?   In the interest of not making this look like distinctly different questions, I want this to be interpreted as more of a "How does this work?" question, and I'd appreciate any resource with further details on the matter.


How can I programmatically change a file's icon?

If I select an icon in Nautilus and select Properties, I can click on the icon presented there. This gives me a file-chooser dialog to select a new icon image.  I would like to do this via a script of some sort so that I can assign the same icon to many files at once. Or take a list of icons and a list of files and assign them to each other.  Is there some way I can accomplish this? Something in bash or Python would be great, but I'll take what I can get.  Please note:   I am not asking how to change the icon for a file type. I am not asking how to change an icon on the launcher.


Cannot find the decision made as indicated in the email and the passport has also not yet been returned

Email from TLScontact states that decision has been made and sent directly to my email however, I haven't seen the email nor received the passport.   Any one who has ever received a similar email and how they retrieved the UKVI email? Dear Customer, TLScontact was notified by UKVI that a decision related to your visa application has been made and communicated directly to you by email. As soon as your passport is ready to be returned, you will receive another email about the collection or the delivery procedure. You can track the progress of your visa application by connecting to your account or by using our Track My Application app.


Is java function's parameter value propagation?

Why does the following code print "1234" rather than "welcome"?I think that String is not a primitive variable,it is an object.So the function "changeStr" get the reference of "str".But the fact is seem like "changeStr" get a copy of the str.Why?  public class Test1 {      public static void changeStr(String str){         str="welcome";     }     public static void main(String[] args) {          String str="1234";         changeStr(str);         System.out.println(str);     } }


Everything is too crowded in dropdown on Area 51

Look at this:        There are several problems:   | help | chat | log out | is on its own line and should be on the same line as Area 51 Right angle thing (∟) is out of place No space between site icon and site name anywhere No space between lines in the "Your Communities" list   Please fix.


While searching in web regarding whether rate of change of acceleration is possible or not; I came across the concept of . I want to know whether photons which can be accelerated can also have jerk or not?


I have a brand new LG G5 phone and randomly ads will pop up. The ads started appearing before I installed any app.  How do I get rid of them?


@misc{rotgdo30j2012agdo31j2012,     author = {{Central Electricity Regulatory Commission}},     title = {{Report on the grid disturbance on {30^{th}} July 2012 and grid disturbance on {31^{st}} July 2012}},     howpublished = {\url{http://www.cercind.gov.in/2012/orders/Final_Report_Grid_Disturbance.pdf}},     year = {2012},     month = {August} }   I am unable to get the superscripts "30^{th}" and "31^{st}" in my bibliography. How can this be achieved?  I am using  \bibliographystyle{ieeetr}


Up&Down vote arrows overlap with "First Posts" explanation panel

When doing posts review, vote arrows overlaps with explanation panel when scrolling down. Probably, just simple z-index issue.    Environment: Chrome (Version 80.0.3987.132 (Official Build) (64-bit))


How old does a question have to be for it to be a late answer?

Kind of feel silly asking this but...I like reviewing, it's fun. At the time of this post I've reviewed 297 First Posts, but only 30 Late Answers, primarily because Late Answers appear less often. This got me thinking:  How old does a question have to be, for an answer by a new user to be considered late?  The Reviewer badge has been awarded 3720 at the times of this post. It would be interesting to see a breakdown of the total for the different types.  Ps. Sorry if this is a duplicate, I did look before I posted. If this information is available, I'm not aware of it, please share.


Can't shrink to available partition volume in Windows

I have 1TB HDD with 800GB free space plus a typical System Reserved partition.    I removed system files before shrinking in Disk Management since suggested shrinking size was no more than 100GB   pagefile hybernate system restore debug info disk clean up   rebooted and performed defrag in c: -> properties -> tools  That gave up to 800GB available shrink size, but still shrinking it in Disk Management to suggested or smaller amount results in      There is not enough space available on the disk(s) to complete this operation   It worked shrinking off small amounts like 100GB


Why is this favorite appearing in my network proflile?

I've noticed that  on Math SE is listed , but not for Math SE account.  I don't recall ever favoriting it, except when I tried favoriting it and unfavoriting it to get rid of it (this did nothing), so I believe it should not be listed as a favorite under any of my accounts (the question also says 0 users have marked it as a favorite). Is this a bug?  If not, what is going on? Note:  (now deleted) since I originally thought is appeared as a favorite on my Math SE account, but I didn't get any answers.


I have set a new matcode environment in order to have some matlab code in my .tex file, using the matlab-prettifier package (combined with the listings package). However, I have a problem with the tilde symbol.     \documentclass{article}  \usepackage[english,greek]{babel} \usepackage[utf8]{inputenc} \usepackage{kerkis}  \usepackage{xcolor} \usepackage{listings} \makeatletter % Avoid the spurious error \AtBeginDocument{%     \expandafter\def\expandafter\originalTeX\expandafter{%         \expandafter\@tempcnta\number253\expandafter\relax\originalTeX}% } % apply the fix \addto\extrasgreek{%     \@tempcnta=128     \@whilenum\@tempcnta<253\do{%         \expandafter\babel@savevariable\expandafter{\expandafter\lccode\the\@tempcnta}%         \lccode\@tempcnta=\@tempcnta         \advance\@tempcnta\@ne     }% }  \usepackage{matlab-prettifier}   \lstnewenvironment{matcode}     {     \selectlanguage{english}      \fontfamily{cmr} \fontsize{8}{10}\selectfont     \lstset{      language=matlab-pretty,                 style=Matlab-editor,                 basicstyle = \ttfamily,                 keepspaces=true,                 escapechar=\#}     }     {     \normalsize     \selectlanguage{greek}     }      \begin{document}     \begin{matcode}     % This is a comment.     [~, a ]      \end{matcode}      \end{document}   If I use the kerkis.sty package, then the result is going to be this one, where I miss the tilde symbol (apparently the tilde symbol is not supported by kerkis):   Ignoring (by commenting) the kerkis.sty package, the result is going to be this one:   Although the tilde symbol is somewhat displaced, at least it is visible. As you can see, I tried to load the cmr font inside the matcode environment, but I had no luck with that. So my question is:     How can I load the cmr font inside my matcode environment, without commenting the command \usepackage{kerkis}?   Edit: In order to override this problem and make the tilde symbol appear, I used the escapechar # and I replaced the tilde symbol in my .tex file, with the command #\texttildelow#, but this is not a neat solution for sure.


I'm new to Python and I want to remove and replace the ({ / / }) with space, the sample below  The original sentence:  NULL ({ / / }) Regina ({ 4 p1 p2 / / }) Shueller ({ 5 p1 p2 / / }) works ({ / / }) for ({ / / }) Italy ({ 14 / / }) 's ({ 15 / / }) La ({ 16 / / }) Repubblica ({ 17 / / }) newspaper ({ 18 / / }) . ({ 38 / / })   Transform to this:  Regina Shueller works for Italy 's La Repubblica newspaper.   I've tried this code but that was not what I expected  Sentence = re.sub(r'[({ / / })]',' ', sentence)


Prove the time inversion formula is brownian motion

Let $B=(B_t)_{t\geq 0}$ be a brownian motion. Show the time inversion formula $\hat{B}=(\hat B_t)_t\geq0$ is a brownian motion, where for $t \geq 0$ we set $\hat{B}_0=0$ and $\hat{B}_t=tB_{1/t}$ for $t>0$.  I cant figure out how to do this question , can someone help me ? Thanks


Knowing which java.exe process to kill on a windows machine

When a java based application starts to misbehave on a windows machine, you want to be able to kill the process in the task manager if you can't quit the application normally. Most of the time, there's more than one java based application running on my machine. Is there a better way than just randomly killing java.exe processes in hope that you'll hit the correct application eventually?  EDIT: Thank you to all the people who pointed me to Sysinternal's Process Explorer - Exactly what I'm looking for!


Do I need to put a second article after "and" in the sentence "I am a songwriter and author."?


Point-and-shoot with 50x zoom or DSLR with small zoom?

I am beginner in photography and want to buy a small and cheap camera for learning purposes. I am in a dilemma: should I purchase a point and shoot camera with high zoom (50X) or should I purchase a basic DSLR at the same price.  My budget is not so high but I can get a point and shoot camera for INR 20000. Though there are some DSLR cameras in the same range, the lens quality and Zoom X are not high.  Please recommend, do I get a great point-and-shoot with 50x zoom or a DSLR with small zoom?


I am using autocad for students 2017; I have tried to use the compiled command, but it has not worked. Also, I have tried the command, Mapimport and AutoCad doesn't even found it.   How can I import a shapefile into AutoCad in order to get some measurements I'm interested with?


Story Identification: Human Resistance to Conquering Aliens

This is a story I read back in the late 1990's or early 2000's. It was a sci-fi story and the plot was centered in a city. I believe it was on Earth. There were different tribes of Aliens that fought each other through proxy. Each tribe had augmented humans in different ways and used the humans to fight each other.  I believe there were also robots or cyborgs of some sort.  All of the humans had trackers in their wrists under their tendons. In order to escape, some of them cut the trackers out with a knife. At least one person was able to use a bit of psychic ability where they visualized the tracker being outside of their wrist and then it became so.  That's all I can recall.


I want to prove that$$\binom{2n}{n} \geq \frac{4^n }{ 2n}$$  I tried to solve with Stirling formula and got to  $$\binom{2n}{n} \geq C*\frac{4^n}{ 2n}.$$  I'm not sure how to continue since $C$ could be between $0$ and $1$.  Would greatly appreciate any help.


LWC lightning-datatable Infinite Scrolling Not Working

I am trying to use the built-in infinite loading capabilities of the lightning-datatable. But whenever enable-infinite-loading is set to true, the component repeatedly spams the onloadmore action, even if the user has not scrolled to the bottom of the table.  <template>     <lightning-datatable         key-field="Id"         columns={tableColumns}         data={data}         enable-infinite-loading={isLoaded}         onloadmore={onLoadMoreHandler}>     </lightning-datatable> </template>   import { LightningElement, track } from 'lwc';  export default class App extends LightningElement {     tableColumns = [         {label: 'Number', fieldName: 'Id', type: 'number'},         {label: 'Name', fieldName: 'Name'}     ];      @track data = [];     @track isLoaded = false;      addMoreDataCounter = 0;      connectedCallback() {         this.addMoreData();         this.isLoaded = true;     }      addMoreData() {         const offset = this.data.length;         let newData = [];          for(let i=offset + 1;i<=offset + 100; i++) {             newData.push({                 Id: i,                 Name: 'Test Row #' + i             });         }          this.data = [...this.data, ...newData];          this.addMoreDataCounter++;     }      onLoadMoreHandler() {         console.log('load more');         this.addMoreData();          if(this.addMoreDataCounter === 4) {             this.isLoaded = false;         }     } }   <?xml version="1.0" encoding="UTF-8"?> <LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">     <apiVersion>46.0</apiVersion>     <description>Scroll Issue</description>     <isExposed>true</isExposed>     <masterLabel>Scroll Issue</masterLabel>     <targets>         <target>lightning__AppPage</target>     </targets> </LightningComponentBundle>    In this example, enable-infinite-loading is turned off after the fourth call to addMoreData() to prevent the application from crashing. This component is being used in a single column Lightning App Builder page, where it is the only component. This example is intentionally simplified to generate data on the client side, in order to reproduce the issue in a way that is easy to share.


What level is a spell if you cast it without expending a spell slot?

There are ways to cast spells without expending a spell slot such as:  Master Transmuter (PHB 119):     Restore Life. You cast the raise dead spell on a creature you touch   with the transmuter’s stone, without expending a spell slot or needing   to have the spell in your spellbook.   Armor of Shadows (PHB 110):     You can cast mage armor on yourself at will, without expending a spell slot or material components.   Whispers of the Grave (PHB 111):     You can cast speak with dead at will, without expending a spell   slot.   See also: Channel Divinity: Read Thoughts (PHB 59-60), Mystic Arcanum (PHB 108), Beast Speech (PHB 110), Chains of Carceri (PHB 110), Eldritch Sight (PHB 110), Fiendish Vigor (PHB 111), Mask of Many Faces (PHB 111), Master of Myriad Forms (PHB 111), Misty Visions (PHB 111), Otherwordly Leap (PHB 111), Signature Spells (PHB 115), Spell Mastery (PHB 115), Shapechanger (PHB 119), Boon of Spell Mastery (DMG 232) and Boon of Spell Recall (DMG 232).  What level are these spells if you cast them without expending a spell slot?


I get a null pointer error with the object array

I have a 2D object array i'm trying to store the data field "type" from a text file but i get a null pointer error.  Cell[][] worldArray = new Cell[40][40];  for (int i = 0; i < worldArray.length; i++) {         String line = lines.get(i);         String[] cells = new String[40];         cells = line.split(";");         if (cells.length != 40) {             throw new IllegalArgumentException("There are " + i                     + " cells instead of the 40 needed.");         }         for (int j = 0; j < worldArray[0].length; j++) {             worldArray[i][j].type = Integer.parseInt(cells[j]);         }  and this is my Cell class  import java.awt.*;  public class Cell {  public static int cellSize;  public int x;  public int y;  public int type;  Cell(int x, int y, int type) { this.x = x; this.y = y; this.type = type;


Unable to find expected entry 'restricted/source/Sources' in Release file on 14.04

Whenever I am  updating my Ubuntu 14.04.5 LTS Desktop, the following error occurs in terminal:  W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release     Unable to find expected entry 'restricted/source/Sources' in Release file    (Wrong sources.list entry or malformed file)   Can anyone shed some light on how to fix this?  cat -n /etc/apt/sources.list gives me this  1 # deb cdrom:[Ubuntu 14.04.1 LTS _Trusty Tahr_ - Release amd64 (20140722.2)]/ trusty main restricted 2 3 # See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to 4 # newer versions of the distribution. 5 deb http://in.archive.ubuntu.com/ubuntu trusty main restricted 6 deb-src http://in.archive.ubuntu.com/ubuntu trusty main restricted 7 8 ## Major bug fix updates produced after the final release of the 9 ## distribution. 10 deb http://in.archive.ubuntu.com/ubuntu trusty-updates main restricted 11 deb-src http://in.archive.ubuntu.com/ubuntu trusty-updates main restricted 12 13 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 14 ## team. Also, please note that software in universe WILL NOT receive any 15 ## review or updates from the Ubuntu security team. 16 deb http://in.archive.ubuntu.com/ubuntu trusty universe 17 deb-src http://in.archive.ubuntu.com/ubuntu trusty universe 18 deb http://in.archive.ubuntu.com/ubuntu trusty-updates universe 19 deb-src http://in.archive.ubuntu.com/ubuntu trusty-updates universe 20 21 ## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 22 ## team, and may not be under a free licence. Please satisfy yourself as to 23 ## your rights to use the software. Also, please note that software in 24 ## multiverse WILL NOT receive any review or updates from the Ubuntu 25 ## security team. 26 deb http://in.archive.ubuntu.com/ubuntu trusty multiverse 27 deb-src http://in.archive.ubuntu.com/ubuntu trusty multiverse 28 deb http://in.archive.ubuntu.com/ubuntu trusty-updates multiverse 29 deb-src http://in.archive.ubuntu.com/ubuntu trusty-updates multiverse 30 31 ## N.B. software from this repository may not have been tested as 32 ## extensively as that contained in the main release, although it includes 33 ## newer versions of some applications which may provide useful features. 34 ## Also, please note that software in backports WILL NOT receive any review 35 ## or updates from the Ubuntu security team. 36 deb http://in.archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse 37 deb-src http://in.archive.ubuntu.com/ubuntu trusty-backports main restricted universe multiverse 38 39 deb http://security.ubuntu.com/ubuntu trusty-security main restricted 40 deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted 41 deb http://security.ubuntu.com/ubuntu trusty-security universe 42 deb-src http://security.ubuntu.com/ubuntu trusty-security universe 43 deb http://security.ubuntu.com/ubuntu trusty-security multiverse 44 deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse 45 46 ## Uncomment the following two lines to add software from Canonical's 47 ## 'partner' repository. 48 ## This software is not part of Ubuntu, but is offered by Canonical and the 49 ## respective vendors as a service to Ubuntu users. 50 deb http://archive.canonical.com/ubuntu trusty partner 51 deb-src http://archive.canonical.com/ubuntu trusty partner 52 53 ## This software is not part of Ubuntu, but is offered by third-party 54 ## developers who want to ship their latest software. 55 deb http://extras.ubuntu.com/ubuntu trusty main 56 deb http://archive.canonical.com trusty partner 57 # deb-src http://archive.canonical.com trusty partner 58 deb-src http://extras.ubuntu.com/ubuntu trusty main


When an animal dies in a movie, how do they film it? It's not like they actually kill the animals? Do they just train the animals to lie there?


The Structure Theorem for Finite Commutative Rings with unity state that:  A finite commutative ring $R$ with multiplication identity is isomorphic to a direct sum of local rings.  Suppose all the maximal ideals of $R$ are $M_1, M_2, ..., M_n$,  and let $J$ be the Jacobson radical of $R$. There exists a positive integer $k$ such that $J^k=0$.  There is an assertion in the proof which says that $M_i$ is the unique maximal ideal such that  $M_i^k\subseteq M_i$, why?    The complete proof of the theorem see    p. 9, lem. 9 in the thesis  p.95, thm. (VI.2) in the book "Finite rings with identity", Bernard R. McDonald p.40, thm. 3.1.4 in the article "Finite commutative rings and their applications", Gilberto Bini and Flamino Flamini


An observer on Earth watches two spaceships (also with observers) fly by, one coming from the left, one coming from the right. (The space ships are on parallel paths and will pass each other closely but won't collide.) Each spaceship is going 75% the speed of light with respect to the Earth observer.  What does each observer see, regarding the other two?


Lost my Stack Overflow account when I trashed my e-mail address

I used to log in to Stack Overflow using my Yahoo ID. Now that I've deleted my e-mail address I can't access my account on Stack Overflow. I am unable to log in through Stack Exchange either. Is there any way to merge my old profile and my new one?  My old profile:


SSH client name resolution fails for names that are resolvable

We have a linux box (called jumper) that is used to access servers in a few separate DMZs. Each DMZ has its own subdomain name (e.g. idmz.example.org, jdmz.example.org), and each subdomain has its own authoritative name server.  We're in the process of replacing the old Solaris jumper with a new Linux box. Most things have worked well, but we have a problem with connecting to servers in the subdomain idmz.example.com using SSH. Ping works fine; we can resolv the name using dig, but SSH says "Could not resolve".  Name resolution works well on the server side, and when we connect using the IP address there is no delay or timeout. But SSH on the client side claims to not be able to resolve the server.  Ping and failed SSH connection:  jenny@jumper$  ping server.idmz.example.com PING server.idmz.example.com (192.168.1.3) 56(84) bytes of data.  jenny@jumper$  ssh -v server.idmz.example.com OpenSSH_5.3p1, OpenSSL 1.0.0-fips 29 Mar 2010 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * ssh: Could not resolve hostname server.idmz.example.com: Name or service not known   Successful SSH connection using IP instead of host name:  jenny@jumper$  ssh 192.168.1.3 jenny@192.168.1.3's password:    The one difference I can see from the client side is that I can't get an authoritative answer from the name servers for idmz, but I do get it from all the other DMZ domains.


[root@host]# ls -lad /etc/ecm/zookeeper-conf lrwxrwxrwx 1 root root 29 May 11 19:51 /etc/ecm/zookeeper-conf -> /etc/ecm/zookeeper-conf/3.4.6   I have a smylink from /etc/ecm/zookeeper-conf point to /etc/ecm/zookeeper-conf/3.4.6 But /etc/ecm/zookeeper-conf/3.4.6 doesn't exist.   So, when I run ln -s /etc/ecm/zookeeper-conf-3.4.6 /etc/ecm/zookeeper-conf, I get ln: failed to access '/etc/ecm/zookeeper-conf': Too many levels of symbolic links   1.How to build a smylink forcibly with ln?  2.How to decide whether a bad symlink is exist with python? If you run os.path.exists(bad-link), you will get False


What mean should I use when few big values?

for a project I need to calculate several means, I then compare each of these means to a distribution under the null hypothesis H0. However sometimes some values (few) are much larger than all the other values, so if I use a basic arithmetic mean these values will greatly impact the final mean. Here is an example  Here if I do an arithmetic mean I get about 90, while in reality we can see that the vast majority of values on the axis are around 50. Do you have an idea of an average that would be used in this kind of case?


Magnetic field and magnetic field intensity and magnetisation intensity ($B$, $H$, $I$)

I am really confused between magnetic field (B)and magnetic field intensity(H) and magnetisation intensity(I) Please can someone explain them to me and these formula H=B/μ -I, I=M/V, I am a high school student so i may not be able to understand tensors and stuff which a lot of other articles i read used. I also don't yet know the analogies of these with there electrostatic counter parts.


Is there any way to use a "constant" as hash key in Perl?

Is there any way to use a constant as a hash key?  For example:  use constant X => 1;  my %x = (X => 'X');   The above code will create a hash with "X" as key and not 1 as key. Whereas, I want to use the value of constant X as key.


Can a Warlock with Pact of the Chain gain Magic Resistance from a Pseudodragon familiar?

If a Warlock selects Pact of the Chain, they gain the ability to summon a pseudodragon familiar with Find Familiar. Pseudodragons have a sidebar in the Monster Manual entitled Variant: Pseudodragon Familiar. It reads:  VARIANT: PSEUDODRAGON FAMILIAR Some pseudodragons are willing to serve spellcasters as a familiar. Such pseudodragons have the following trait. Familiar. The pseudodragon can serve another creature as a familiar, forming a magic, telepathic bond with that willing companion. While the two are bonded, the companion can sense what the pseudodragon senses as long as they are within 1 mile of each other. While the pseudodragon is within 10 feet of its companion, the companion shares the pseudodragon's Magic Resistance trait. At any time and for any reason, the pseudodragon can end its service as a familiar, ending the telepathic bond.  This describes a variant ruling where a spellcaster can befriend a pseudodragon and gain the Magic Resistance trait. However, because a warlock summons the pseudodragon directly, it's not clear if this would apply to their situation. If a Warlock summons a pseudodragon familiar through pact of the chain, does the Warlock also benefit from the pseudodragon's Magic Resistance trait?


Is there a way to have \show not behave like an error?

Everybody loves the \show tex primitive.  Sadly it so happens that whenever I \show something the execution/compilation which I call using pdftex -halt-on-error also stops, which was quite supprising to me having not perceived \show primitive to be an error. Can somebody please tell me to stop \show behaving like an error? Why was it behaving like an error in the first place?  the output after a show was used like this  \def\a{A} \show\a   is the following  >\a=macro: ->A. l.2 \show \a  !  ==> Fatal error occurred, no output PDF file produced!   Besides my testing, also  tells about \shows behavioral problems it states     TeX will prompt the user for interaction in the event of an error   ('error' includes \show or similar) (The user may of course alter the   run mode within TeX using the related primitives.)   This seems to motivate this question further, as if I understand right there is a way to alter the run mode within TeX. I think that would be the way to stop \show being an error, but how?


How to change user's language (locale) back to English?

I made the mistake of trying out some settings through Administration -> Language Support. Now my user account has LANG set to fi_FI.utf8, even though I want to use en_US.utf8. (This is kind-of a follow up to .)  Listing 1: current locale settings for my user account:  $ locale LANG=fi_FI.utf8 LANGUAGE=en LC_CTYPE="fi_FI.utf8" LC_NUMERIC="fi_FI.utf8" LC_TIME=en_GB.UTF-8 LC_COLLATE="fi_FI.utf8" LC_MONETARY="fi_FI.utf8" LC_MESSAGES="fi_FI.utf8" LC_PAPER=fi_FI.utf8 LC_NAME="fi_FI.utf8" LC_ADDRESS="fi_FI.utf8" LC_TELEPHONE="fi_FI.utf8" LC_MEASUREMENT=fi_FI.utf8 LC_IDENTIFICATION="fi_FI.utf8" LC_ALL=   Listing 2: /etc/default/locale which contains the locale settings I want to use:  $ cat /etc/default/locale  LANG="en_US.utf8"  LC_TIME="en_GB.UTF-8" LC_PAPER="fi_FI.utf8" LC_MEASUREMENT="fi_FI.utf8"   The Administration -> Language support settings look like this:     My specific questions:    Where exactly (in what file) are the user-specific locale settings (listing 1) stored? What is the recommended way of changing that? By editing a file or through some config UI? (I want to use the settings in listing 2.)   The root annoyance which prompted me to ask this: How to change Firefox UI language from Finnish back to English?  I'm using Ubuntu 10.04 if that makes any difference.


Why is Earth's gravity stronger at the poles?

Many sources state that the Earth's gravity is stronger at the poles than the equator for two reasons:   The centrifugal "force" cancels out the gravitational force minimally, more so at the equator than at the poles. The poles are closer to the center due to the equatorial bulge, and thus have a stronger gravitational field.   I understood the first point, but not the second one. Shouldn't the gravitational force at the equator be greater as there is more mass pulling the body perpendicular to the tangent (since there is more mass aligned along this axis)?


Where could I download Income data at the Block Group level... census data

Where could I download  Income data at the Block Group level,   actually I'm not sure where or how to download it at the tract level either.    I would be interested in the most recent data that is available.


Is there any spell-check tool for LaTeX?

I found some webpages but not helpful to me. I'm using MikTex 2.9 with pdfTeX. Thanks.


First and first, I had Netbeans installed on my laptop when it was on 12.04 but after I upgraded it to 13.04 and could not find it on my dash so thought it was removed on upgrade.  I tried to reinstall it using the .sh file from they're official website and then I found out that it was already installed so I uninstalled it from my laptop and tried to again to install it(so it would be a fresh install),but when the installer came out it told me that "All components are installed".  After that I tried cleaning my system with ubuntu tweak's janitor and tried again but yet the problem persisted, and after this I manual deleted any directories/files related to netbeans(searched the directories/files with nautilus) and yet the problem is still there.  When the installer start(without errors), it simply says:"All components are installed" and the "Next" button is deactivated.  I installed Netbeans 7.0.1 from software center but I would want to install the latest version.   Any clues/tips/help?


How to identify the pattern of a sequence

Are there some particular methods for identifying the following types of number series?    $6, 10, 19, 44, 93, \cdots$ (Difference being prime no's square starting from 2) $1, -2, 15, 52, -512, \cdots $ ( $^*2-4,\ ^*-6+3,\ ^*4-8,\ ^*-10+5$, and so on) $4, -2, -7, 25, 95,\cdots$ ( $^*-1+2,\ ^*2-3,\ ^*-3+4,\ ^*4-5$, and so on)      I mean they do not follow the arithmetic or geometric series nor do their common difference seem to follow any AM-GM pattern. So, is there any generalized mathematical theorems on these types of number series? Or we have to do it on a trial & error basis using intuition?


I want to change the frequency of an audio file. Meaning: the whole file should sound (say) one octave higher or lower. How to do it? Using ffmpeg or other command line open source tool would be preferable.


How to rotate $2n$-sliced pizza so half the people are happy

There are $n$ boys and $n$ girls sitting around a round table in some order. In the middle of the table there is a pizza sliced to $2n$ parts some parts contain olives and some parts contain mushrooms. The boys are willing to eat only mushroom parts and girls are willing to eat only olive parts. Prove that it is possible to rotate the pizza so at least half the people are happy?  I couldn't find a similar question to this. I think it needs to use the pigeon hole theorem in some way but I cannot find the right way.


All files under Home folder are write protected by unknown username

Using Ubuntu 16.04, I gave all the permission of my home folder to an unknown username and now I am unable to write to the files under my home folder including Documents, Downloads etc...  How do I give back permission to the current user account?


How can I label the axes of a grid of subfigures?

Is it possible to make a 3 by three grid of plots in a latex figure and then label only the columns and rows, rather than needing captions for each? So for example, I'd like columns to be labelled A, B and C and the rows 1, 2, and 3. I'd then be able to reference square (2, B) as the middle square.   I'm using a figure environment with 9 subfigure environments  \begin{figure*}[t]     \begin{subfigure}{0.3\textwidth}         \includegraphics[width=\linewidth]{/path/to/img1}     \end{subfigure}%     \begin{subfigure}{0.3\textwidth}         \includegraphics[width=\linewidth]{/path/to/img2}     \end{subfigure}%     \begin{subfigure}{0.3\textwidth}         \includegraphics[width=\linewidth]{/path/to/img3}     \end{subfigure}      \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img4} \end{subfigure}% \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img5} \end{subfigure}% \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img6} \end{subfigure}      \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img7}     \caption{Smad7 reproduced} \end{subfigure}% \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img8} \end{subfigure}% \begin{subfigure}{0.3\textwidth}     \includegraphics[width=\linewidth]{/path/to/img9} \end{subfigure}       \caption{} \end{figure*}


I know it might be weird, but I'm trying to boot a Windows version on dual boot in Linux for gaming. I followed these steps:   Download a version of Windows; Copy the files inside the *.iso to the mounted USB stick with cp command; Restart the machine; Change BIOS to recognize either USB CD/DVD or USB Hardrive as first boot in priority.   The system does not recognize the stick. I suspect it might be due to permissions issues.  Thank you in advance.


How to redirect Https CONNECT Request with Squid Explicit Proxy

I want to block certain urls for some users of my internal network. I am using a squid based explicit proxy for this purpose with a redirect_program. The clients are configured to use a pac file for https urls which makes them route their https requests to the explicit proxy.  The problem is, the redirection of any CONNECT request for an https url to a blocked page url fails. I tried both http and https based blocked page urls but could not find any luck. For some reasons, I do not want to use a transparent proxy with ssl bumping.   Safari gives the error 'Safari cannot open the page. The error was "There was a problem establishing a secure tunnel through the web proxy server"'  Chrome gives the error 'This web page is not available. ERR_TUNNEL_CONNECTION_FAILED'.   Here is a line from access.log for .  07/Oct/2015:01:41:29 -0500     74 172.0.0.9 TCP_REDIRECT/302 253 CONNECT www.yahoo.com:443 - HIER_NONE/- -  I read somewhere that the browser is expecting to start an SSL/TLS handshake after the connect request and that is why it is failing. Here is a qoute from the documentation of squid redirector.  "URL alterations and particularly redirection are only possible on certain methods, and some such as POST and CONNECT require special care."   It does not say redirection is not possible for CONNECT method. However, no where is it mentioned that how can we redirect POST and CONNECT (I am particularly interested in CONNECT) or any example is given.   Please guide me on how to redirect https connect requests to a blocked page. If this is not possible, is there a work around for this with explicit proxy? Thank you.  I am using squid 3.5.4 on ubuntu.


Requests for site not hosted on my server

I am seeing http get requests in my servers access log for a site that is not hosted on my server and also the dns records of the site do not point to my server the domain points to 3 ip addresses in china. Anyone have any ideas as to why this would happen?


How can I revert a chmod on the etc directory?

I accidentally executed the following command on the etc directory:  sudo chmod -R 700 /etc   I know that I have done something very wrong. My terminal now prints:  I have no name!@ubuntu: /$   How can I revert my etc directory to its earlier state?  I tried changing the permissions but it is failing now. Also, it would be very helpful if someone can explain what actually went wrong when I executed that command on etc. It was only file permissions. Then why does the whole system seems completely blown up? Why is it that no login passwords are working now? I know that there is a file in etc directory that has to do with users. But how did changing permissions jeopardize everything? Some technical details about this would be very helpful.


OnClick only works in the first 10 rows of dataTable

I have a dataTables where each row has a number input form. When you click the input form, buttons will appear. However, it only works in the first 10 entries. After that, (searching, next page, sorting, etc), it wont. Is there anything I am doing wrong? How can I fix this?  CSS   echo '

       <input type="number" class="form-control" value="'.$row["prod_count"].'">

 	';   JQUERY


How can you define scientific mind? What i think , it is a bend of mind that can be developed by any person(also one not related to field of science).This mind is fulfilled with abilities to observe clearly and sceptical about what he sees.It means the person will be keen to dig out truth and did not reaches to a conclusion easily. He utilizes facts enhance them with logical reasoning and fills the gap with their imagination.  Is there any disadvantage or any kind of limitation with scientific mind?


$(\Bbb R,+)$ is a topological group. Is there any other group structure on $\Bbb R$ such that it is still a topological group and this group is not isomorphic to $(\Bbb R,+)$ ?  Refer to  for the general problem. In that problem I have conjectured that there is no such group however I couldn't prove it.


Accidentally deleted openssl lib packages and can't get yum or wget to work again

So I was trying to upgrade openssl and decided to remove the existing openssl packages because it was from a different repository.  Once removed, I can't no longer get either yum or wget to work again because they all seem to rely on ssl  I'm missing the files  libssl.so.10 libcrypto.so.10   I was able to recover libssl.so.10 by using libssl3.so that existed locally, but not with libcrypto.so.10 yet (since this file probably need to be downloaded from a remote location).  yum:  The error leading to this problem was: libcrypto.so.10: cannot open shared object file: No such file or directory   wget:  wget: error while loading shared libraries: libcrypto.so.10:   In other words, I'm now in a catch-22; I can't use yum, wget, curl, rpm (with url), or rsync (by connecting to a backup server instance) because they all require ssl lib files.  I can't even open a new SSH to the problematic server since SSL lib files is now gone. (can only access with existing Putty prompt).  I try "copy and paste" the file content with VIM editor using another snapshot backup but doesn't seem working.  I'm thinking if there is a way to download a rpm or even a single file over plain http using existing tools not listed above...


How to install and run CPUSim 4.0.11 on Ubuntu 18.04 LTS?

I'm going according to the steps mentioned on the cs colby .  First, I installed java on my system by typing the following commands-  sudo add-apt-repository ppa:linuxuprising/java sudo apt-get update sudo apt-get install oracle-java10-set-default sudo apt install oracle-java10-set-default     Then, according to the instructions, I downloaded the .zip file, extracted it and then in the terminal typed   java -cp .:richtextfx-fat-0.6.10.jar:reactfx-2.0-MR.jar -jar CPUSim-4.0.11.jar   But this didn't work.  of command 1 terminal.  Here is a screenshot of all the files that are there in the CPUSim folder,   On observing the names of the folders present, I thought that the previous command was wrong. So I tried the following ones,  java -cp .:richtextfx-fat-0.6.10.jar:reactfx-2.0-M4.jar -jar CPUSim-4.0.11.jar java -cp .:richtextfx-0.6.10.jar:reactfx-2.0-M4.jar -jar CPUSim-4.0.11.jar   But none of them seems to work. Now when I click on the CPUSim-4.0.11.jar file, nothing happens. I have just switched to Ubuntu from Windows 10, and have a very little knowledge about how things work here. Please tell me how I could install and run CPUSim 4.0.11 on Ubuntu 18.04 LTS.


Question about articles: Why is "before the train came" correct?

Example sentence:     I had a little time before the train came.   Would you please explain to me why it is correct to use "the" before "train"? My teacher told me that "the" is used before objects well-known to both speakers and that if a noun is used for the first time we shoud use "a".   But in this example the speaker uses "train" for the first time. Moreover we don't know about this train, so we must use "a train", not "the train". But it was a native speaker who said it; what exactly did he mean to say?


Making sense of low DNA match for half-siblings

My DNA match on Ancestry was thought to be my half sister. After my test came back, 713 cMs across 20 segments, 10% shared DNA, longest segment 136, that says my Grandfather would be her father, but my father makes more sense. I have read that females carry more DNA from their fathers than Males do. If my full sister gets tested, is there a possibility that hers may come up higher into the half sibling? Is there any possible way with my numbers I could be her half sibling? Also, what about getting my daughter tested? She and my sister are the only females in the family on my fathers side.


Calling python from a c++ program for distribution

I would like to call python script files from my c++ program.   I am not sure that the people I will distribute to will have python installed.  Basically I'm looking for a .lib file that I can use that has an Apache like distribution license.


I have file structure that looks like this:  images/     1.png     2.png     3.png photos/     1.jpg     2.jpg     3.jpg self/     chapter1.tex     chapter2.tex     chapter3.tex copied/     chapter1.tex     chapter2.tex     chapter3.tex main.tex   (and few other files, but that's not important here). Now I want to include those images and chapters inside main.tex, however I have a lot more than just 3 and I have been wondering if there is a way to specify default location to look into. As I am using graphix package, i have \graphicspath{{images/}{photos/}} for images, but is there something similar for content files as well?  EDIT: Change file structure to have content files divided into multiple folders


In a Feistel cipher structure, what exactly does the "round function $F$" do?

In a Feistel cipher structure, what exactly does the "round function $F$" do to the right half of the data, before taking XOR of the output with the left half of the data?


If I run:  sudo apt-get dist-upgrade   It upgrades all the packages on my system, including LibreOffice, Chrome & Firefox, which for me is undesirable.  How can I tell Ubuntu to only install system patches, whilst allowing me to manually upgrade my applications?  I am using Ubuntu 14.04 x64


Isomorphism between $D_{2n}/Z(D_{2n})$ and $D_n$

I need some help with the following task: Show that  for all $n\geq2$ is $D_{2n}/Z(D_{2n})\cong D_n$ $D_n$ is the dihedrial group with $2n$ elements and looks like $D_n=\{id,r,...,r^{n-1},s,sr,...,sr^{n-1}\}$ Sadly I have no idea how $D_{2n}/Z(D_n)$  looks like but I guess I need to know that to show that it is a homomorphism and bijectiv. Thanks for helping me


Agreement of verb 'to be' and a singular noun after a plural noun

How does the subject-verb agreement work when a singular noun describes a plural one? Of the following, which sentence is righter?  The computers is a good choice. The computers are a good choice.  Is there a rule about these types of formations? Please explain.


Is there a fundamental difference between artificial neural networks and "other" supervised machine learning models

I would like to link three of these resources, present my understanding of what I read, and pose the question if my understanding is approximately correct        Reading the linked resources and assuming that the answers and comments are correct, I gather that (I quote myself, including bad spelling: this post is heavely edited, the initial content is in the history)     From a certain, very abstract viewpoint, a supervised machine learning problem is an optimization problem. You try to maximize some "measure of good-ness" or minize some measure of "bad-ness". The way you formulate the problem defines, in a way, the "machine learning model". There might be different ways how you solve the optimization problem ("train the model").   is not wrong. [A]  Question 1: is [A] correct?  If [A] is correct, than in that sense, f.ex. a CNN (or ANNs in generall) is not different from a SVM or a Random Forest. [B]  Question 2: Is [B] a reasonalbe conclusion?  However, there exists proof that  1) FFN are universal approximators  2) RNNs are Turing complete  I've read (unfortunately, I can't find the resource anymore) that it is possible to approximate Random Forest (and I would assume SVMs, ...) with certain kind of ANNs, but not the other way round.  So in that sense the concept of ANN is more generall than SVMs or Random Forests (I'm struggling with the language a lot here...) [C]  Question 3: Is [C] correct?


Is it possible for an one-or-two-person clan to build a dojo? If so, what are the resources involved?   I'd like to experience the whole Dojo building experience so I don't plan to join an existing Clan with a dojo already.


Message 'E:dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.'

Whenever I am trying to get the update I am getting the error at the last line:  Ign http://in.archive.ubuntu.com trusty-updates/multiverse Translation-en_IN Ign http://in.archive.ubuntu.com trusty-updates/restricted Translation-en_IN Ign http://in.archive.ubuntu.com trusty-updates/universe Translation-en_IN Ign http://in.archive.ubuntu.com trusty-backports/main Translation-en_IN Ign http://in.archive.ubuntu.com trusty-backports/multiverse Translation-en_IN Ign http://in.archive.ubuntu.com trusty-backports/restricted Translation-en_IN Ign http://in.archive.ubuntu.com trusty-backports/universe Translation-en_IN E: dpkg was interrupted, you must manually run 'sudo dpkg --configure -a' to correct the problem.   And then according to the prompted error when I run:  $ sudo dpkg --configure -a dpkg: error: parsing file '/var/lib/dpkg/updates/0009' near line 0:  newline in field name `#padding'   What now? Can I get out of the error?  I tried this .


Holomorphic function $\varphi$ with fixed point $z_0$ such that $\varphi'(z_o)=1$ is linear?

This is an exercise in complex analysis:     Let $\Omega\subset{\Bbb C}$ be open and bounded, and $\varphi:\Omega\to\Omega$ a holomorphic function. Prove that if there exists a point $z_0\in\Omega$ such that   $$ \varphi(z_0)=z_0\qquad\text{and   }\qquad \varphi'(z_0)=1 $$   then $\varphi$ is linear.   I'm trying work out the case $z_0=0$ first, in which $$ \varphi(z)=z+\sum_{n=2}^{\infty}a_nz^2. $$ It suffices to show that $a_n=0$ for all $n\geq 2$. If let $$ \varphi(z)=z+a_2z^2+O(z^3) $$ then  $$ \varphi^k(0)=z+ka_2z^2+O(z^3), $$ and $$ \varphi^k(0)=0,\quad (\varphi^k)'(0)=1. $$ If one can show that $\{ka_2\}_{k=1}^{\infty}$ is uniformly bounded, then one at least has $a_2=0$. But I don't know how to go on. Any idea?


I'm using a theme called .  Now in the login page, /?q=user, it looks somewhat like this:   All I want to do is change the order of the tabs, where "Log in" is in front, number one, then Request new password, then lastly Create new account.  Aka: [Log in][Request new password][Create new account]  I've tried looking in the theme's folder, including page.tpl.php, and in the user module files to see if I could find where it was defined/rendered but I couldn't find anything.  also did not seem to be what I wanted.  Sorry for being such a noob.


I am looking for an algorithm that shows the exact coefficients some variables that have on a hospital patient's chronological age versus their biological age.   I understand a lot of the variables that go into determining ones biological age (i.e. Blood pressure, diet, family history of disease, obesity etc.) but not the amount of impact that it has on the actual scoring of their age.  I have found many sites that will calculate it, however I need the actual variable coefficients and influence in order to produce a proper score for thousands of patient records.   Thanks in advance for your input!


How do I add an attachment to an email using System.Net.Mail?

I have an excel document represented as a byte[] and I'm wanting to send it as an attachment in an email.  I'm having a bit of trouble constructing the attachment.  I can create an Attachment which has the following constructors:  (Stream contentStream, ContentType contentType) (Stream contentStream, string name) (Stream contentStream, string name, string mediaType)   My idea at the moment is to create a MemoryStream from the byte[] and pass it to the method which creates the attachment.  Unfortunately I can't see a way to obtain the intended filename and content type from the MemoryStream and I also can't see how to supply the correct content type. There are options for plain text, Pdf, Rtf etc but none that I can see that immediately jump out at me as the one I should use for an Excel document.   The closest I can find is  which states:      The Octet member designates that the   attachment contains generic binary   data.   However, even if this is the one to use, unless it can be passed as a property of the Stream then my method for sending emails will only be able to send a byte[] as an Excel document...  Is there perhaps some other sort of Stream I could use? Or will I have to create my own type of Stream that has the details I need.  Surely someone out there has done this thing before and surely Microsoft would have thought this through to this level....  Any help would be much appreciated.  Update: Please don't vote for any answers that use the constructors that take the filename as a string. I'm really needing help using the ones that take a Stream...I want to avoid having to write the file to disk, email it, and then immediately delete it. Since there is a method that allows me to do that I'd like to use that one if at all possible.  Solution Update  Conrad managed to find what I was looking for! Thanks heaps man!  I'll just document the suggested solution just in case something happens to the content at the supplied link.  Credit for this solution goes to   static void AttachmentFromStream() {  //create the mail message MailMessage mail = new MailMessage();  //set the addresses mail.From = new MailAddress("me@mycompany.com"); mail.To.Add("you@yourcompany.com");  //set the content mail.Subject = "This is an email"; mail.Body = "this content is in the body";  //Get some binary data byte[] data = GetData();  //save the data to a memory stream MemoryStream ms = new MemoryStream(data);  //create the attachment from a stream. Be sure to name the data  //with a file and  //media type that is respective of the data mail.Attachments.Add( new Attachment( ms, "example.txt", "text/plain" ));  SmtpClient smtp = new SmtpClient("127.0.0.1"); smtp.Send(mail); }   In my case, it just means I'll have to change my method to take the filename and fileformat as strings. I'll try using the Octet one...but failing that I'll just pass in the official MIME type.  All things considered, this is a pretty obvious solution...but I do appreciate the help in solving it...and the good thing is this solution will be documented for future programmers who have the same problem.  Thanks again everyone for you help!


I'm trying to make a beamer presentation for a talk. The title of the talk is fairly long. I want to figure out how to make sure only the last part of the title is displayed footer of the slide. I attempted to use the \subtitle command, but it only forced the beginning of the title to shift down. Is there anyway to fix this?  \documentclass{beamer} \usetheme{Boadilla}  \AtBeginSection[] {     \begin{frame}<beamer>         \frametitle{Roadmap}         \tableofcontents[currentsection]     \end{frame} }     \subtitle{Some results on the notion of} \title{Independence on Simple Theories}  \begin{document}  \frame{\titlepage}  \end{document}   This produces "Independence on Simple Theories" in bigger letters followed by "Some results on the notion of" by smaller letters, but I want, "Some results on the notion of" by smaller letters followed by "Independence on Simple Theories". This is one fix for my problem, but any other solutions to make the footer always show "Independence on Simple Theories" in the footer will also work.


Are 'Dr' for medical doctor used in the same sense as a PhD?

My dentist is Dr. Wang and my physician is Dr. O'Connor but I also refer to my professor as Dr.   Are these the same titles? Did they all achieve what it took to get a Dr. title?


Can someone tell me what this stamp means?


Solving an ODE where the function is evaluated on different points

How does one solve a differential equation of the form $$f'(x) = f(x) - f(x-1)? $$ Is there any analytic way to obtain a solution?


Transit visa required for Iranian flying from Turkey through London to USA?

I'm an iranian citizen with having Iranian passport and USA permanent resident visa currently in Turkey for a visit and have a return flight to USA.   Below is information about my return flight to USA and according to that I have a question please:   My return flight to USA is a transit flight from Antalya AYT airport to London Gatwick airport with Thomas cook airlines and then my next flight is on the same calendar day and at the same airport  (London Gatwick) with Norwegian Airline which I have confirmed flight ticket for my onwarding flight. So my final destination is USA.  I need your assistance with my question please about whether or not I need any other travel documents like transit visa for my transit flight from Antalya AYT airport to London Gatwick airport with Thomas cook airline?


\citeyear and \citeauthor do not create hyperlinks

When I use \parencite for example, it creates a hyperlink in the PDF which I can click to get to the reference in the bibliography. However, with \citeauthor and \citeyear it does not create one. It does create a mention in the bibliography however, so that is not the problem.  Does anybody know how to fix this? I don't know all the relevant commands for this, I use a standard template found on Overleaf. But the command for my bibliography is the following:  \usepackage[backend=bibtex,style=authoryear,maxcitenames=2,maxbibnames=15,natbib=true]{biblatex}   And the following I found in the .cls file:  \ifbool{hyperrefsupport}{% If the nohyperref class option has not been specified \AfterPackage{biblatex}{ % Load the hyperref package after the biblatex package for compatibility  \RequirePackage{hyperref} % Required for customising links and the PDF \hypersetup{pdfpagemode={UseOutlines}, bookmarksopen=true, bookmarksopenlevel=0, hypertexnames=false, colorlinks=true, % Set to false to disable coloring links citecolor=Crimson, % The color of citations linkcolor=red, % The color of references to document elements (sections, figures, etc) urlcolor=magenta, % The color of hyperlinks (URLs) pdfstartview={FitV}, unicode, breaklinks=true, }\   Thanks in advance!  Edit: I found how to do it for the \citeauthor command by adding the following to the preamble: However, I was unable to modify it to work for \citeyear.  \DeclareCiteCommand{\citeauthor}%   {\boolfalse{citetracker}%    \boolfalse{pagetracker}%    \usebibmacro{prenote}}   {\ifciteindex      {\indexnames{labelname}}      {}%    \printtext[bibhyperref]{\printnames{labelname}}}   {\multicitedelim}   {\usebibmacro{postnote}}


I have a Linksys E4200 router and a laptop with an Intel Centrino Wireless-N 135 adapter. If I place my laptop right next to the router, the link speed is about 20 Mbps. Is that normal or is there any way I can increase it?  (P.S. Sorry if this question sounds stupid...)


How to make div onClick at the content only

I need to run some script when user click the content div and another script when user click the container div.  But when I click content div it run content script and container div.  How to make it only run content script when the content div is clicked.  Thanks


I need to include code in the appendix of my thesis. The code contains comments and the compilation instantly breaks returning:  Unicode char �\lst@FillFixed@ (U+5A8) (inputenc)                not set up for use with LaTeX. l.160       if (lastArg < 0, lastArg = 360°                                               + lastArg);   This is only one of many characters which produce problems. I cannot change my entire code just because this won't compile. Is there any way to include code with arbitrary unicode characters? Thank you.   Edit: complete sample code, as requested.  \RequirePackage[l2tabu,orthodox]{nag}   \documentclass[headsepline,footsepline,footinclude=false,oneside,fontsize=11pt,paper=a4,listof=totoc,bibliography=totoc]{scrbook} % one-sided   \usepackage[toc,page]{appendix} \usepackage{listings} \usepackage[utf8]{inputenc}  \lstset{     inputencoding=utf8,   extendedchars=true,   basicstyle=\footnotesize\ttfamily,   showstringspaces=false,   showspaces=false,   numbers=left,   numberstyle=\footnotesize,   numbersep=9pt,   tabsize=2,   breaklines=true,   showtabs=false,   captionpos=b,     literate={ö}{{\"o}}1 {ä}{{\"a}}1 {ü}{{\"u}}1  }  \begin{document}  \begin{appendices} \lstinputlisting{code/power_series.html} \end{appendices}  \end{document}   Relevant content of power_series.html:  if (lastArg < 0, lastArg = 360° + lastArg);   There really is not much to say about this problem. I only want to be able to use all unicode characters inside a listing. Thank you.


You know, we all have inflation. You can buy less on your USD, Euros and RUBs today than year before. I was advised to buy gold if I do not want my money be eaten by inflation. Gold is advised for long-term savings. However, I look at the goldprice.org    The price of gold is roughly constant. I ignore the 2008 spike. The constant means that you can buy as much gold per your dollar as you could a year ago. Yet, the dollar is cheaper today, so, the gram of gold must also be cheaper. The plot shows me that gold loses its value as much as the dollar and other printed currencies, it is subject to inflation. It shows that the gold value is eaten at the printed money inflation rate or gold is mined exponentially with time at money doubling rate. Is my observation right?


I got a , with the seatpost made with aluminium carbon-wrapped.  The problem is that the seatpost tends to slide downwards, even if I squeeze a lot the snap ring; if the ground is uneven the seatpost slips completely.  Is there a way to solve this problem?  Many thanks.


How to keep a php file from being executed by typing the exact page url

I have a php file whose content is like this, the url to it is "www.xyz.com/abc.php" for example  <?php include "def.php"; echo "something"; ?>   how can I keep the "def.php" from being excuted when the user typing the url "www.xyz.com/def.php"


These days, the standard way to present differential calculus is by introducing the Cauchy-Weierstrass definition of the limit. One then defines the derivative as a limit, proves results like the Leibniz and chain rules, and uses this machinery to differentiate some simple functions such as polynomials. The purpose of my question is to see what creative alternatives people can describe to this approach. The nature of the question is that there is not going to be a single best answer. I have several methods that I've collected which I'll put in as answers to my own question.  It's not reasonable to expect answers to include an entire introductory textbook treatment of differentiation, nor would anyone want to read answers that were that lengthy. A sketch is fine. Lack of rigor is fine. Well known notation and terminology can be assumed. It would be nice to develop things to the point where one can differentiate a polynomial, since that would help to illustrate how your method works and demonstrate that it's usable. For this purpose, it suffices to prove that if $n>0$ is an integer, the derivative of $x^n$ equals $0$ at $0$ and equals $n$ at $1$; the result at other nonzero values of $x$ follows by scaling. Doing this for $n=2$ is fine if the generalization to $n>2$ is obvious.


A homeomorphism is a continuous function between topological spaces that has a continuous inverse function.  Can someone provide examples of a continuous function between topological spaces that does not have a continuous inverse function?   It would help me grasp the intuition for what a homeomorphism is.  Feel free to use different topological spaces for your examples (but at least one with $\mathbb{R}$ would be nice)!


Divergence of a Vector Field - Surprising Result

I'm following the text Introduction to Electrodynamics by Griffiths, and I came across the following in an in-text problem:     Sketch the vector function v = $\frac{\boldsymbol{\hat{\mathbf{r}}}}{r^2}$, and compute its divergence. The answer may surprise you... can you explain it?   Well, the answer did surprise me, for the sketch of the function is indeed indicating a diverging field (like field lines from a point positive charge), yet the math claims the divergence to be zero. What's going wrong?   This is the solution I have, from a manual, which also doesn't make sense to me:     The answer is that $\nabla·v = 0$ everywhere except at the origin, but at the   origin our calculation is no good, since $r = 0$, and the expression for $v$ blows up. In fact, $\nabla·v$ is infinite at that one point, and zero elsewhere.   Could someone please help me understand the situation? Any help would be appreciated, thanks!  P.S. I understand that this has been asked  on Physics SE, but I didn't understand the answers. The one with most upvotes said:  Pretty sure the question is about $\frac{\hat{r}}{r^2}$, i.e. the electric field around a point charge. Naively the divergence is zero, but properly taking into account the singularity at the origin gives a delta-distribution. (Answer by @genneth)  What's the delta distribution in conversation?


How does tar deal with hardlinked files?

I have a 2.5 TB of data that I want to put in a 2TB hard drive to mail somewhere. It's not hopeless, as a very large fraction of the data consists of duplicate files. I am considering using  with the -H option, which will replace duplicate files with hardlinks to a single file.  Here's the problem: If I tar a directory containing multiple hard links to other files in the directory tree, will tar "reduplicate" them in the archive file?


What is the correct pronunciation of "the"?

The is sometimes pronounced "tha" (/ðə/) or "thi" (/ðiː/). Which is the correct pronunciation of this word? Are both correct and used interchangeably at specific places? If the second question is correct, please provide the rule of pronouncing at different places.


In the case I have two numbers large enough to justify using scientific notation twice $A \times 10^{B \times 10^C}$ or $Ae+Be+C$ How would I calculate Modulo without taking the numbers or any part of them out of scientific notation?


I was wondering how to understand the following:     Piping the stdout of a command into the stdin of another is a powerful   technique. But, what if you need to pipe the stdout of multiple   commands? This is where process substitution comes in.   In other words, can process substitution  do whatever pipe can do?   What can process substitution do, but pipe cannot?


I am trying to find the Frenet frame of the following curve:  $$\zeta(t)=\left(\frac13(1+t)^{3/2},\frac{1}3(1-t)^{3/2},\frac{t}{\sqrt2}\right)$$  How do I do this? Is there a straightforward way from the curvature and Torsion? I can't find the definition anywhere.


Show that: $\lim\limits_{r\to\infty}\int\limits_{0}^{\pi/2}e^{-r\sin \theta}\text d\theta=0$

I would like to show $\lim\limits_{r\to\infty}\int_{0}^{\pi/2}e^{-r\sin \theta}\text d\theta=0$.  Now, of course, the integrand does not converge uniformly to $0$ on $\theta\in [0, \pi/2]$, since it has value $1$ at $\theta =0$ for all $r\in \mathbb{R}$.   If $F(r) = \int_{0}^{\pi/2}e^{-r\sin \theta}\text d\theta$, we can find the $j$th derivative $F^{(j)}(r) = (-1)^j\int_{0}^{\pi/2}\sin^{j}(\theta)e^{-r\sin\theta}\text d\theta$, but I don't see how this is helping.  The function is strictly decreasing on $[0,\pi/2]$, since $\partial_{\theta}(e^{-r\sin\theta})=-r\cos\theta e^{-r\sin \theta}$, which is strictly negative on $(0,\pi/2)$.  Any ideas?


best way to add char* prefix to existing char* in C

What I have:   char * a = "world"; char * b = "Hello";   What I need is:   char * a = "Hello World";   I need to add b before a. Is there any function that doing it?


How can I make close-by objects appear as if they were much bigger?

We all know the popular  technique that gives objects a "miniature" look, making them appear much smaller than they actually are.  I'm wondering whether it's possible to achieve the opposite effect and if so, how? For example, making a photograph of a lawn appear as if it's a huge patch of grassland shot from a plane. Or making a rock look like it's a mountain.  Are there differences in focus and depth at play here that can be manipulated, or is it all down to other factors like familiar objects, dust, mist etc. that gives the human eye an idea of the scene's "vastness"?  In my specific case, I would like to make a photographic journey through a small creek appear like it was taken from a (miniature) plane. I have a .


Where can I ask a question about an error I'm getting in Debian?

This question is about an error of a sign of MikTeX in my computer with Debian. This error is     E: El repositorio « stretch InRelease» no       está firmado.   This means that:     The repository « stretch InRelease» is not signed   when I write apt update in the terminal. I don't know if its topic is Tex-LaTeX, Unix & Linux, or Stack Overflow. I'm going to make this question on Stack Overflow, but I think it is off-topic.


Call webservice with NTLM authentication

Is it possible calling a Webservice using NTLM authentication from apex? It is a Microsoft Navision Webservice, I tried to do it in Java following this  and it works.


Are there certain rules when punctuations i.e. period, exclamation, and question mark can be placed inside or outside the quote, or both?

Which of these sentences are using the proper usage of punctuation?  Nicolo said, "I'll let you know if anything changes." Nicolo said, "I'll let you know if anything changes". Nicolo said, "I'll let you know if anything changes.".  Or is there a certain rule when all of the sentence is correct especially when writing novels or stories.


Prove that every planar graph is the union of at most $5$ acyclic   graphs.      Reminder: As union of two graphs $G_1(V_1, E_1)$ and $G_2(V_2, E_2)$ we consider the graph $G(V_1\cup V_2,E_1\cup E_2)$   I have tried induction on the number of vertices, but I seem to miss something


What is the difference of  LinkedList<String> l1 = new LinkedList<String>(); List<String> l2 = new LinkedList<String>();   Why does l2 type don't have method addFirst while l1 type have method addFirst? even though they are both  hold a LinkedList object? Contrary to what I read from Gosling's "The Java Programming language" which states that the object will be what you made it to be, in this case I made it a LinkedList with new LinkedList() even though it is of type List  How should I properly declare then?  Collection<String> c = new LinkedList<String>(); List<String> c = new LinkedList<String>(); LinkedList<String> c = new LinkedList<String>();


What is the difference between #!/bin/sh and #!/bin/bash?

if I write,  #!/bin/bash echo "foo"   or  #!/bin/sh echo "foo"   both yields same. I have seen some scripts starting with #!/bin/sh or #!/bin/bash. Is there any difference between them?


My spouse and I own our house (about a decade or so left on the mortgage, will be paid off early). My sibling lives nearby, renting an apartment. Rent is rather high in this area, and we've talked about having them move in with us.  If an adult filing taxes as an independent adult moves in with family filing taxes jointly, how is/can this be classified tax-wise?  My understanding/assumption is there are two options (I'm probably wrong about this):   Sibling is tenant, paying market rate rent: sibling pays rent. Rent is reported as income for me and my spouse, and deductible (in MA) for sibling. Sibling is tenant, paying sub-market rent: difference between paid rent and market rent is a gift to the sibling. Gift tax may be owed depending on dollar amount. No rent is paid. Sibling is dependant. Is sibling eligible for health insurance (and other benefits etc.)?


Is this going to converge? $\sum_{n=1}^{\infty}\frac{1}{n^{n}}$

I have this series $\sum_{n=1}^{\infty}\frac{1}{n^{n}}$ is it converging, or diverging, what test do you use?


Differential Equation of the Form $\frac{dy}{dx}=\sin(x+y)$

I have been attempting to solve the above differential equation for some time now, and I remain stuck on one step. After substituting $u=x+y$, separating the variables, and integrating both sides, I am left with $$\frac{\sin(u)-1}{\cos(u)}=x+c$$ I have to solve for $y$, and thus, for $u$, but I cannot think of any identity which helps me here. Any help would be appreciated.  I followed the step in the solution, and set $$\frac{\tan(\frac{u}{2})-1}{\tan(\frac{u}{2})+1}=x+c$$ Then, I used the substitution $z=\frac{1}{1+\tan(\frac{u}{2})}$, which led to $1-2z=c+x$, which in turn, simplified to $z=\frac{1}{2}-\frac{c}{2}-\frac{x}{2}$. Then, substituting back: $$u=-2\arctan\left(1-\frac{1}{\frac{1}{2}-\frac{c}{2}-\frac{x}{2}} \right)$$ Thus, for all $n \in \mathbb Z$, the solution of the differential equation is $$y=-x-2\arctan\left(\frac{c+x+1}{c+x-1}\right)+2\pi n$$ Is my process correct, and do I require the $2\pi n$ generalization in my final expression?  Edit: The solution can also be expressed in indefinite form as $$\tan(x+y)-\sec(x+y)=x+c$$


A problem I should solve is the following IVP: I need to find an approximation for small $\varepsilon$ of $$y'' + y + \varepsilon y^3 = 0, y(0) = 1, y'(0)=0$$  My approach so far was:  I assume that I already know a solution, call it $y(t)$. Then I have a look at the Taylor series at $t-\varepsilon$ in order to get the following:  $$y(t) = \sum_{k=0}^{\infty} \frac{y^{(k)}(t-\varepsilon)}{k!}(\varepsilon)^k$$  This gives me a dependency on epsilon, and can only have a look at the first two terms of the series and say that for sufficiently small epsilon the terms $\mathcal{O}(\varepsilon^2)$ can be neglected.   The next thing I do is using the IV, giving me:  $$y(0) = y(-\varepsilon)+ y'(-\varepsilon)\varepsilon = 1$$ and $$y'(0) = y'(-\varepsilon)+y''(-\varepsilon)\varepsilon = 0$$  Using both equations I get the ODE $$y(-\varepsilon) -\varepsilon^2y''(-\varepsilon)=1$$ and solve that Euler-type ODE.  I am confused about the meaningfulness of this last ODE and this approach in general. The solution will be dependent on $\varepsilon$ and I am unable to see how it should approximate the first given ODE.  Any help is greatly appreciated!


I am having windows 7 OS and IE11 browser. IE11 will support svg so that we have checked the condition as below   var svgSupport = (window.SVGSVGElement) ? true : false;         if (svgSupport) {          //svgrender;        }         else{          //vmlrender        }   but vmlrendering is happening because window.SVGSVGElement is false. i want the svg render to take place as i am having iE11 browser. IS there any best way to detect the svg and vml? and why window.SVGSVGElement is false in windows 7?  Thanks in Advance


Let $\{\alpha_{i}\}_{i=1}^{n}$ be distinct numbers. What is the determinant of the $n$ by $n$ matrix \begin{gather}  \begin{pmatrix}   \alpha_{1}^{n-1} & \alpha_{1}^{n-2} & \cdots & 1 \\   \alpha_{2}^{n-1} & \alpha_{2}^{n-2} & \cdots & 1 \\   \vdots  & \vdots  & \ddots & \vdots  \\   \alpha_{n}^{n-1} & \alpha_{n}^{n-2} & \cdots & 1  \end{pmatrix} \end{gather} ?


TeXstudio Could not start Build and View

I'm using MikTeX 2.9 and TeXstudio 2.6.6. The path to MikTeX is correct and in "Check LaTeX installation" the process exite normally.   My problem is when I tried to "Build & View" (F1) an error message pops up with the message:  Could not start Build and View:PdfLaTeX:pdflatex.exe -synctex=1 interaction=nonstopmode   and no log file is found.  Using TeXWorks the process is done without any problems.  I like using TeXstudio, what can I do to fix this?


When one inserts:  \begin{figure}   \includegraphics"{picture.pdf}   \caption{Figure caption in English} \end{figure}   The figure caption starts with the word "Figure". How can I change the word "Figure", e.g. in another language?


NullPointerException while dealing with creating an intent in MainActivity

I've been looking into this for a few days and can't seem to find a thread specific to my problem. My app crashes every time I try to add a string to my bundle. I'm getting the error at extras.putString(EXTRA_MESSAGE, message);  MainActivity.java  public class MainActivity extends AppCompatActivity {      private ArrayList<String> priceGroupSpinnerItems;     public static final String EXTRA_MESSAGE = "lss.mywebsiteoffline.MESSAGE";     public String message = "";      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          Spinner spnPriceGroup = (Spinner) findViewById(R.id.price_group_spinner);          ArrayAdapter adapter = ArrayAdapter.createFromResource(this, R.array.list_price_group, android.R.layout.simple_spinner_item);         adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);         spnPriceGroup.setAdapter(adapter);          message = spnPriceGroup.getSelectedItem().toString();     }      /** Called when the user taps the Go button */     public void sendMessage(View view) {          Intent mIntent;          mIntent = new Intent(this, nextActivity.class);         Bundle extras = mIntent.getExtras();         extras.putString(EXTRA_MESSAGE, message);         mIntent.putExtras(extras);         startActivity(mIntent);      } }   Logcat  E/AndroidRuntime: FATAL EXCEPTION: main Process: lss.mybbofflinever3, PID: 8181 java.lang.IllegalStateException: Could not execute method for android:onClick at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) at android.view.View.performClick(View.java:5702) at android.widget.TextView.performClick(TextView.java:10896) at android.view.View$PerformClick.run(View.java:22546) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7224) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) at android.view.View.performClick(View.java:5702)  at android.widget.TextView.performClick(TextView.java:10896)  at android.view.View$PerformClick.run(View.java:22546)  at android.os.Handler.handleCallback(Handler.java:739)  at android.os.Handler.dispatchMessage(Handler.java:95)  at android.os.Looper.loop(Looper.java:158)  at android.app.ActivityThread.main(ActivityThread.java:7224)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)  Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.os.Bundle.putString(java.lang.String, java.lang.String)' on a null object reference at lss.mywebsiteoffline.MainActivity.sendMessage(MainActivity.java:59)   I have tried examples to use just intent, or bundle, and adding strings directly to putString. I might be missing something blatantly obvious. Not sure what I might be looking for after adding strings directly to the putString method and getting the same error.


How to use Secure Erase and is it on the install CD?

Supposedly there is some built in hard drive magic called "Secure Erase" which is wildly faster and more secure than "dd if=/dev/zero..."  I am most excited about the speed increase.  There seems to be a GUI for it as part of Parted Magic:   Is there something like this for Ubuntu?  Better yet, is there a way to actually issue this command "manually" like with smartctl or something?


Can I visit the US for tourism on a previously unused B1/B2 visa?

Note: This is NOT a duplicate of  Difference: In both other questions, the posters traveled once to the US for the original purpose for which the B1 visa was obtained. Their question is about visiting again using the same visa. However, I've not traveled to the US yet, and I'm planning my visit. What I want to understand whether I can use this visa for a visit whose purpose is not the same as what was submitted along with the application.  Can I use a B1/B2 visa for tourism that was originally obtained for business purposes BEFORE I actually visit the US even once? I had applied for a business visitor visa for a valid business reason but by the time I got it stamped, my plan changed. So I've not visited the US even once. Can I now use this visa to visit as a tourist without having used that visa for its original intended purpose? PS: I live in India.


Remove "Show Desktop" button next to the clock in Windows 7

Windows 7 has a new "Show Desktop" button all the way at the edge of the system tray area. Is there any way to get rid of it?  I never use it because I just press Win+D instead, and it's kind of annoying to me.


Are There Functions Where $(f\cdot g)^\prime$ is equal to $f^\prime \cdot g^\prime$?

My math teacher recently asked my class to find if there are any functions that comply to the rule $$(f\cdot g)^\prime = f^\prime \cdot g^\prime$$ I have searched the web for an answer but I couldn't find it, could anyone help me with that? or at least point me to the right direction?