I've been searching for some time for a correlation metric analogous to the Pearson correlation value for numerical vs numerical features, or Cramér's V for categorical vs categorical features, but this time for categorical vs numerical features.  This is my toy data example in Python, where the categorical variable is not ordinal and notice that the number of observations per class of the categorical feature is not the same:    pd.DataFrame({'numerical': np.array([19, 27, 31, 26, 39, 43, 32, 29, 19, 19, 27, 31]),                'categorical': np.array(['A', 'A', 'A', 'A', 'A', 'B', 'B', 'B', 'C', 'C', 'C', 'C'])})   I've seen a lot of answers referring Interclass Correlation (but I don't have a square matrix and also I don't have subjects being analysed by several judges...). Also, I've seen that the use of one-way ANOVA is also frequent, but it does not solve the problem because it does not translate in a clear strength of association coefficient as Pearson.  Can you suggest a metric or it is impossible to have one for this case?

I've already read all the pages in this site trying to find the answer to my problem but no one seems to be the right one form me...  First I explain you the kind of data I'm working with...  Let's say that I have an array vector with several names of city, one for each of 300 users. I also have another array vector with scores response to a survey of each user or a continuous value for each user.  I would like to know if exist a correlation coefficient that compute the correlation between these two variables so, between a nominal and a numeric/continuous or ordinal variables.  I've searched on the Internet and in some pages they suggest to use the contingency coefficient or Cramer's V or Lambda coefficient or Eta . For each of this measure the just say that they could be applied for such data in which we have a nominal variable and interval or numerical variable. The thing is that searching and searching, trying to understand every one of them, sometime is written or watching the examples that they are reasonable to use them if you have dichotomous nominal variable, except for Cramer's V, other time is not written any requirement for the type of data. A lot of other pages say that is right to apply regression instead, that is right, but I would just simply like to know if there is a coefficient like pearson/spearman for this kind of data.  I also think that is no so properly to use Spearman Correlation coeff since the cities are not sortable.  I have also built the function of Cramer'sV and Eta by myself (I'm working with Matlab) but for Eta they don't talk about any p-value to see if the coefficient is statistically significant...  In the matlabWorks site there is also a nice toolbox that says to compute eta^2 but the kind of input it needs is not understandable.  Is here someone that have done a test like mine? If you need more detail to understand the kind of data I'm using just ask me and I'll try to explain you better.


How can I make the shortcut arrows on my desktop icons consistent? Some are 75% of the image, and others are 20% of the image.  There doesn't seem to be anywhere that this can be edited, or even toggled on/off.

I have upgraded from Ubuntu 18.04 to 20.04LTS.  So far, everything is running well except my desktop icons sometimes exhibit a massive arrow (this is the case of the *.desktop files:  Is there a way to resize and or hide these arrows?  I did not see any possibility in gnome-tweaks. To make it clear: in the above icons, Corbeille (created by the system) is what I would like to see.  Veramtex and Pycharm both are .desktop files with the corresponding icons.  Only there appears a large arrow on both.  Could I get rid of those? Here is the content of Pycharm.desktop [Desktop Entry] Type=Application Terminal=true Name=Pycharm Icon=/..../pycharm-community-2020.2/bin/pycharm.png Exec=/..../pycharm-community-2020.2/bin/pycharm.sh Name[fr_BE]=Pycharm  And this is icon pycharm.png (without the arrow)


I am trying to check if a field is already filled with data in the database. If is is I want to update the information but if it's empty I want to insert the information into the database. But it doesn't work now :  $info = $_POST['info']; $gebruiker = $_POST['gebruiker']; $getnamequery = mysql_query("SELECT fysionummer                                FROM algemene_info WHERE fysionummer = '$gebruiker'"); $result = mysql_query($getnamequery) or die(mysql_error());  $row = mysql_fetch_row($result);  if ($gebruiker === $row) {       $sql = 'UPDATE algemene_info             SET omschrijving=$info         WHERE fysionummer=$gebruiker';       echo "Het update van de algemene informatie is geslaagd!";  } else {      mysql_query("INSERT INTO algemene_info (`info_id`, `omschrijving`, `fysionummer`)             VALUES (NULL, '$info', '$gebruiker')") or die (mysql_error());      echo "Het toevoegen van de oefening is geslaagd!";  }

While executing an INSERT statement with many rows, I want to skip duplicate entries that would otherwise cause failure. After some research, my options appear to be the use of either:  ON DUPLICATE KEY UPDATE which implies an unnecessary update at some cost, or INSERT IGNORE implies an invitation for other kinds of failure to slip in unannounced.  Am I right in these assumptions? What's the best way to simply skip the rows that might cause duplicates and just continue on to the other rows?


My problem: I am trying to vertically align my button in my Header. I have defined the classes and to my extent, they seem to be correct. I have tried many things like going on w3schools, searching through other stacks, going on reddit, etc. Still nothing. I have tried different positions, and displays, and again, nothing. Please help me, it is bugging me very much and I am just trying to make this look nice. HTML <!DOCTYPE html>       <meta charset="UTF-8">     <meta name="viewport" content="width=device-width, initial-scale=1.0">     <link href="main.css" rel="stylesheet" type="text/css"/>     <title>Document</title>
         <button class='home'>Home</button>
CloudBoard

         CSS @import url('https://fonts.googleapis.com/css2?family=Fira+Mono&display=swap'); @import url('https://fonts.googleapis.com/css2?family=Pacifico&display=swap'); @import url('https://fonts.googleapis.com/css2?family=Pacifico&display=swap'); * {     margin: 0;     padding: 0; }  body {     background-color: rgb(138, 169, 255); }  .header  {     height: 70px;     background-color: rgb(24, 24, 24);     position: relative; }       .home {         display: inline-block;         position: relative;         font-size: 10px;         margin-left: 900px;         vertical-align: middle;     }           .secret {         position: relative;         margin-left: 10px;         line-height: 75%;         text-align: left;         font-size: 40px;         font-family: 'Pacifico', cursive;         color: white;     }          .secretButton:link {             background-color: transparent;             text-decoration: none;             color: white;         }          .secretButton:hover {             color: lightblue;             opacity: 75%;         }

I have a div with two images and an h1. All of them need to be vertically aligned within the div, next to each other. One of the images needs to be absolute positioned within the div. What is the CSS needed for this to work on all common browsers?

testing...


I have windows 7 and my disc drive has a capacity of 120 GB. From one day to another it tells me that my disc C is full in a red bar but I dont have many programs installed. I deleted all of my videos, games, music, pictures, etc and I was able to free up 30 GB. I ran the disk cleaner and emptied the TEMP folder and garbage can but it still shows a 70GB used. Can I get some help from the experts PLEASE!!!

How can I visualize which folders and files are taking up all of the space on my hard drive?  I'm getting some conflicting reports on the size of hard drive contents. Namely what is and isn't there and what folders are actually using the space.   I need to know which of the files or folders the culprits behind all this hidden bloat. Also there should be a print option to get it on paper.


Sendmail supports a feature called 'plussed users'. Once enabled, emails sent to   myname+spam@example.com, myname+sometopic@example.com and myname+anything@example.com   are automatically delivered just like mails to myname@example.com. There is no need to register or set up these 'plus suffixes'. The user can just use them and set up client-side filtering rules on his own.  Does Exchange support a similar mechanism? If so, how to enable it?  Note that I don't want answers about other means of filtering, e.g. spam/junk filtering, server-side or client-side rules, email aliases/addresses that are configured explicitly and so on.

Sometimes it is useful to have e-mail address like foo-randomnumber@example.org, where randomnumber identifies the conversation between a robot such as a mailing list server and a user. Is this possible with Microsoft Exchange?


When using \section*{XXXXXX} it won't show in the table of contents. Is there any way to show this section without a number in the toc?

Possible Duplicate:          I've got something like  \documentclass{article} \begin{document} \tableofcontents \section*{About this Article} \section*{About this Author}  \section{First Step} \section{Second Step} \end{document}   My table of contents won't show the "About this Article" and "About this Author" sections.      How do I retain the format of \section*{...} yet still show the section in the table of contents?


There's red circle with white minus sign in the middle that says that a problem has occured when checking for updates. I'm also unable to open "Software & Updates" and "Software Center". I have tried uninstalling and reinstalling the software-center, but it gives me this error when I try to open the software-center via terminal.  File "/usr/bin/software-center", line 140     print time.time()              ^ SyntaxError: invalid syntax   Appears to python2 code. Is it using python3 to interpret?  when i tried software-properties-gtk   it gave me this     File "/usr/bin/software-properties-gtk", line 32, in <module>     import aptsources   File "/usr/lib/python3/dist-packages/aptsources/__init__.py", line 3, in <module>     import apt_pkg ModuleNotFoundError: No module named 'apt_pkg'

I run below command on ubuntu 16.4 :  sudo add-apt-repository ppa:noobslab/apps  of below question:    and get below error:  Traceback (most recent call last):   File "/usr/bin/add-apt-repository", line 11, in <module>     from softwareproperties.SoftwareProperties import SoftwareProperties, shortcut_handler   File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 27, in <module>     import apt_pkg ModuleNotFoundError: No module named 'apt_pkg' Error in sys.excepthook: Traceback (most recent call last):   File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 63, in apport_excepthook     from apport.fileutils import likely_packaged, get_recent_crashes   File "/usr/lib/python3/dist-packages/apport/__init__.py", line 5, in <module>     from apport.report import Report   File "/usr/lib/python3/dist-packages/apport/report.py", line 30, in <module>     import apport.fileutils   File "/usr/lib/python3/dist-packages/apport/fileutils.py", line 23, in <module>     from apport.packaging_impl import impl as packaging   File "/usr/lib/python3/dist-packages/apport/packaging_impl.py", line 23, in <module>     import apt   File "/usr/lib/python3/dist-packages/apt/__init__.py", line 23, in <module>     import apt_pkg ModuleNotFoundError: No module named 'apt_pkg'  Original exception was: Traceback (most recent call last):   File "/usr/bin/add-apt-repository", line 11, in <module>     from softwareproperties.SoftwareProperties import SoftwareProperties, shortcut_handler   File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 27, in <module>     import apt_pkg ModuleNotFoundError: No module named 'apt_pkg'   Thanks for help


More specifically, should I clear immigration when sailing from California to Hawaii?

For example, if I as a Canadian took a sail boat with infinite supplies, left Halifax, NS and did a giant loop of the Atlantic Ocean never getting within 200 NM of any other country (thereby leaving both  and the ), do I have to report to Canada Border Services Agency upon returning to Canada?


Let $R$ be a ring with identity. Let $u \in R$ has at least one right inverse. Show that if $u$ has exactly one right inverse, then $u$ is a unit.

Suppose $u$ is an element of a ring with a right inverse. I'm trying to understand why the following are equivalent.   $u$ has at least two right inverses $u$ is a left zero divisor $u$ is not a unit   If $v$ and $w$ are distinct right inverse of $u$, then $u(v-w)=0$, but $v-w\neq 0$, so $u$ is a left zero divisor. It's also clear that if $u$ is a left zero divisor, it cannot be a unit (else I could cancel $u$ from $ub=0$ to see $b=0$).  I'm having a heck of a time seeing why $u$ is not a unit implies $u$ has at least two right inverses. I tried the contrapositive, but saw no good approach. What am I missing?


Let P be the set of k elements.What is the number of ways we can choose an ordered pair (R,S).Where R and S are disjoint subsets of P.

Let $A$ be a set of $n$ elements. Then, in how many ways, can we choose an ordered pair $(B,C)$, where $B,C$ are disjoint subsets of $A$?  Let A={1}, then B can be {phi} and C can be {1}. So, one ordered pair.   Let A={1,2}, then B can be {phi}, {1} and C can be {1},{2}. So three ordered pairs.   Let A={1,2,3}. Then B can be {phi},{1},{2} and C can be {1},{2},{3}.   So six pairs ? Am I going in the right direction ?


I have a computer simulation from which I get a sample of values of some microscopic quantity $X$, i.e. $\{ x_1,\ldots,x_N \}$. I'm interested in estimating the expected value of $X$, i.e. $E[ X]\approx\frac{1}{N}\sum x_i$, and the variance associated with this estimate.   Now, do I understand correctly that:   taking the estimate of the variance of $X$, $Var[X]\approx\frac{1}{N}\sum (x_i-\bar{x})^2$, is NOT what I'm looking for (which in this notation would be $Var[E[X]]$)? I need to make use of some statistical technique, such as bootstrapping?

I have been looking into the inner-workings of the standard error recently, and I found myself unable to understand how it works. My understanding of the standard error is that it is the standard deviation of the distribution of sample means. My questions are:  • how do we know the standard error is the standard deviation of the sample means when we usually take just a single sample?  • why doesnt the equation to calculate the standard error mirror the standard deviation equation for a single sample?


I need to create a map/data-explorer application that works offline (no internet connection), and I am trying to find out if anyone has developed desktop applications with QGIS similar to how one might ?

At my institute we are revising and updating a methodology for participatory mapping of land degradation, that involves creating a simple land use map, subdividing each land use unit in a number of sub-categories (e.g north  vs. south exposed areas) and assigning quantitative and qualitative values to a certain number of pre-defined attributes (e.g cause of degradation, degradation level, counter measures implemented, ...).  We are exploring the idea of providing users with a custom made version of QGIS with a very simplified interface, and custom buttons to guide the users to the different steps of the evaluation.  Is this technically possible and allowed by the license terms?


I'd like to install Ubuntu Touch on my Jolla Phone device. Is it possible? Any guides on how to do that? Has anyone tried theirself?  Edit: I see Jolla Phone isn't on the list of currently supported devices, but since Jolla is having financial problems (and maybe even going down), I think there might be demand for a port in the near futue. At least I don't want to be stuck with the current version of Sailfish OS forever. Porting should be possible, since Jolla Phone is Android HW and the OS is running on top of Android drivers.

With the announcement of the Ubuntu Phone OS I'd like to know what phone (and tablet) models are supported at this time.  Note from foss & Oli: We are making this the master question for all future "Will this work on <insert random tablet/phone/device here>?!" questions


I have a weird problem in C++. Probably I am just doing something wrong, but I can't figure out, what. I am using Microsoft VS2013 if that is important.  I created a new class with two constructors:  class CtVolume{ public:          CtVolume();                                                  CtVolume(std::string path);                              ...   The first one should overwrite the default constructor. This is the one that does not work as I expected. If I do something like:  CtVolume myVolume();   then I think this should call the default constructor that I defined and execute the code I implemented for it. But it doesn't. The code in my Constructor is not executed. What is even more puzzling is that I can't use the myVolume like an object afterwards. If I attempt to call one of the methods implemented in the class:  myVolume.reconstructVolume();   The compiler does not let me compile my code. It says:     Error 5   error C2228: left of '.reconstructVolume' must have class/struct/union   So as it seems, this way I can't create an object.  Now, if I create the object with the keyword 'new' instead, my constructor code is being executed and everything works as expected. Example:  CtVolume* myVolume = new CtVolume(); myVolume->reconstructVolume();   This works fine.  Now another thing: if I use the other constructor I defined, both ways of creating the object work equally good, meaning this example:  CtVolume myVolume("sourcefiles/data/skullPhantom"); myVolume.reconstructVolume();   compiles and works as expected.  Now I tried to find out what type of myVolume is in the different cases, by calling typeid(myVolume).name(). This returns the type class CtVolume __cdecl(void) in the case that I described, where it "doesn't work" and class CtVolume in the "working" case where I used the other constructor.  Now can anybody tell me, what the __cdecl(void) means and what I did wrong? What also puzzles me is that I think I did that a lot of times before and it always worked for me until now.  Thanks!

Is there any good reason that an empty set of round brackets (parentheses) isn't valid for calling the default constructor in C++?  MyObject  object;  // ok - default ctor MyObject  object(blah); // ok  MyObject  object();  // error   I seem to type "()" automatically everytime. Is there a good reason this isn't allowed?


I am a victim  of sql injection, they hacked into my mysql database and they started deleting data and also they changed passwords. I thought using PDO am safe. This is my login page for PHP. I need help where did I go wrong here which led to the attacks. I would like to be advised on how to improve this code to avoid similar attacks to happen again.   <?php session_start(); ?> <?php require_once('dbconnect/pdo.inc.php'); $username = (isset($_POST['username'])) ? trim($_POST['username']) : ''; $password = (isset($_POST['password'])) ? trim($_POST['password']) : ''; $pas = md5($password); $redirect = (isset($_REQUEST['redirect'])) ? $_REQUEST['redirect'] :         'index.php'; $result = array(); $result['error'] = FALSE; $result['message'] = ""; //if(isset($_POST['submit'])){  if (empty($password)) {     $result['error'] = true;     $result['message'] = "enter password"; //json encode and echo reusult.     $res = json_encode($result);     echo $res;     exit(); } if (empty($username)) {     $result['error'] = true;     $result['message'] = "enter username"; //json encode and echo reusult.  $res = json_encode($result);     echo $res;     exit(); } $query = ("SELECT username FROM users WHERE username=:username  AND password =:password"); $query_login = $con->prepare($query); $query_login->execute(array(     ':username' => $username,     ':password' => $pas)); $results = $query_login->rowCount(); if ($results > 0){     $_SESSION['username'] = $username;     $_SESSION['logged'] = 1;     $result['error'] = false;     $result['message'] = 'Successfully logedin';         header('Location:index.php');     $res = json_encode($result);      echo $res; } else{ //set these explicitly just to make sure      $result['error'] = true;     $result['message'] = 'User name invalid';     header('Location:login.php');  $res = json_encode($result);     echo $res;     exit(); } //  } ?>   //This is the way I connect to the database   <?php function connected_Db(){      $dsn  = 'mysql:host=localhost;dbname=usaDB;charset=utf8';     $opt  = array(         PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,         PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC     );     #echo "Yes we are connected";     return new PDO($dsn,'brrmingham','m#67yhfdelkomngf_()likf4', $opt);  } $con = connected_Db(); if($con){ //echo "connected "; } else { //echo "Connection faid "; exit(); } ?>

If user input is inserted without modification into an SQL query, then the application becomes vulnerable to , like in the following example:  $unsafe_variable = $_POST['user_input'];   mysql_query("INSERT INTO `table` (`column`) VALUES ('$unsafe_variable')");   That's because the user can input something like value'); DROP TABLE table;--, and the query becomes:  INSERT INTO `table` (`column`) VALUES('value'); DROP TABLE table;--')   What can be done to prevent this from happening?


How do I display article that has featured image uploaded?  I using premium theme. I found that all of the themes don't have this feature.  Am I need to configure this in php file?  Or there is another alternative way to fix this?  Hope this will not off topic.    I tried to add 'meta_key' => '_thumbnail_id' in the script below, but not working.
          <?php         $cats_to_show = get_sub_field( 'category_posts_per_page');         $cat_id = get_sub_field( 'category_section_name' );          $ti_cat_posts = new WP_Query(             array(                 'posts_per_page' => 5,                 'cat' => $cat_id,                 'no_found_rows' => true,             )         );   became
      <?php     $cats_to_show = get_sub_field( 'category_posts_per_page');     $cat_id = get_sub_field( 'category_section_name' );      $ti_cat_posts = new WP_Query(         array(             'posts_per_page' => 5,             'cat' => $cat_id,             'meta_key' => '_thumbnail_id'  // Added              'no_found_rows' => true,         )     );

I've got a highlight section on the header of my website which shows the title and the thumbnail of the last X posts having a thumbnail.  Is there any custom query which allows me to retrieve only the last X post having a thumbnail?  At the moment I'm retrieving the last X * 10 posts (because not all the posts have a thumbnail) hoping that in this result I'll have X posts having a thumbnail. After doing my query I add a condition: if (has_post_thumbnail()).  This solution is really uncertain and ugly, a custom query with a thumbnail parameter would be great but I couldn't find any hint about it.


On my Mid-2009 MacBook Pro the Caps Lock button has a convenient delay such that when I hit it accidentally it doesn't turn on immediately. Can I incorporate such a delay for another key combination? I would like to delay the cmd + Q shortcut such that when I accidentally hit it the application is not quit and I have time to recover.

Many, many times, I accidentally press ⌘+Q when I meant to close a tab or window, or switch applications. When I saw the option in Google Chrome to require the shortcut to be held, I was overjoyed. Problem is, I use Safari.  So, in short: How can I make the "hold command-Q" shortcut universal across all of my applications (or at least Safari)?


I install ubuntu 20.04 from usb , and also I did partion part of installation, I format partion then Install , and it stuck on loading for 15 minutes  and there is no loading , there is only cursor that act cycle loading .

I've been trying to replace my current Windows 10 installation with Ubuntu 16.04. My computer is a Lenovo Thinkpad T470. I've formatted my 15GB USB-dongle. Downloaded the software Rufus, and burned the ISO onto the USB. I've tried the settings "MBR Partition for BIOS or UEFI", "MBR Partition for UEFI" and "GPT partition for UEFI". I've tried using memtest86+ to test if I have any memory errors, I have not. I've tried disabling Secure boot, and Fast startup. I've tried using other software than Rufus, and I've tried entering the "nomodeset" in the boot options, as well "acpi=off", nothing works.   When I boot from my USB. I choose "Install Ubuntu" from the grub menu. And then select my language in the installer. It is from this point on, it gets problematic. Sometimes when I try to connect to my WIFI, it connects successfully, but when I press the "continue" button, the installer freezes and nothing happens. Sometimes I get past this point, but it then freezes later on in the installation progress - typically right when I press the "Install now" button.   It should also be mentioned that, if I press the "Quit" button in the install. I get to a black screen with a lot of text saying something like squashfs error.   Can someone please help me? When I tried booting memtest86+ it only worked when I changed my boot mode from UEFI to Legacy. Could this be it? Are there any downsides to installing an operating system in legacy?   If anyone has any other suggestions, it would be greatly appreciated!  Thank you :-)


I want to prove that there exists an inclusion $\mathbb{F}_{p^a} \hookrightarrow \mathbb{F}_{p^b}$ iff $a \vert b$.   Suppose that $a \vert b$, then $b =ac$ for some $c \in \mathbb{Z}$. Consider then that $p^b = p^{ac} = (p^{a})^c \implies p^a \subset p^b$. Therefore we can define an inclusion $\mathbb{F}_{p^a} \hookrightarrow \mathbb{F}_{p^b}$.   Conversely, suppose there exists an inclusion $\mathbb{F}_{p^a} \hookrightarrow \mathbb{F}_{p^b}$ and $a \ \not \vert b$. Then $b \neq ac \implies p^b \neq p^{ac} = (p^a)^c \implies p^a \not \subset p^b$ and therefore no inclusion can be defined from $\mathbb{F}_{p^a} \hookrightarrow \mathbb{F}_{p^b}$. This contradiction yields the necessary result.  Note that $p$ represents a prime.   Is this legitimate?

We know that if a finite field $F$ has characteristic $p$ (prime), then $F$ has cardinality $p^r$ where $r = [F:\mathbb{F}_p]$.   I'm now trying to say something about the possible cardinalities of subfields of $F$. I can see that there is a subfield of cardinality $p^s$ for each $s$ that divides $r$, given by the fixed field of the group generated by $\phi^s$, where $\phi$ is the Frobenius automorphism.  Now suppose $K$ is a subfield of $F$. Then (since both are additive groups), Lagrange gives us that $|K|$ divides $|F|$, so $|K| = p^t$ for some $1 \leq t \leq r $ (alternatively, $K$ contains $\mathbb{F}_p$ and so is a vector space over $\mathbb{F}_p$ and is thus isomorphic to $\mathbb{F}_p^t$, where $t = [K:\mathbb{F}_p]$). By considering the multiplicative group of units of $K$ and $F$ respectively, we get that $ p^t - 1$ divides $p^r -1$. I want to make the leap to $t|r$, but I'm failing to see why this needs to be true. Any help would be appreciated.


I've been a Mac user for a while, and I was really upset about the removal of the startup sounds in the new MacBooks post-2016. I was wondering if there was a way to turn the startup sound back on, or even edit the startup procedure to play a sound file. I currently am using a 2017 MacBook Pro 15-inch running macOS 10.12.6.

I'm one of the lucky (?) guys who managed to get a new MacBook Pro 2016 (the version that introduced the Touch Bar).  This MBP model does not have a boot chime by default.    , specifically going to Terminal.app and typing in:  sudo nvram BootAudio=%01  Unfortunately for me, this fix does not work on my own machine. .  My guess is that it's a firmware fix or enhancement that got rid of BootAudio as an option.  Does anyone know a different option to re-enable the startup chime?


when i try to launch steam a message pops up- you are missing the following 32-bit libraries,and steam may not run: libic.so.6  I tried a get apt-update but the message still pops up anybody know how to fix?


Here's what I keep getting when I sudo apt update  Hit:1 http://archive.canonical.com/ubuntu xenial InRelease Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease                    Get:3 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB]      Hit:4 http://dl.google.com/linux/chrome/deb stable Release                      Hit:5 http://ppa.launchpad.net/gnome3-team/gnome3-staging/ubuntu xenial InRelease Hit:6 http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu xenial InRelease       Hit:7 http://eg.archive.ubuntu.com/ubuntu xenial InRelease                      Hit:8 http://ppa.launchpad.net/linrunner/tlp/ubuntu xenial InRelease      Get:9 http://eg.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB] Hit:10 http://ppa.launchpad.net/nilarimogard/webupd8/ubuntu xenial InRelease    Hit:12 http://ppa.launchpad.net/openjdk-r/ppa/ubuntu xenial InRelease           Hit:13 http://ppa.launchpad.net/plushuang-tw/uget-stable/ubuntu xenial InRelease Hit:14 http://ppa.launchpad.net/ubuntu-desktop/gnome-software/ubuntu xenial InRelease Get:15 http://eg.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB] Hit:16 http://ppa.launchpad.net/ubuntu-desktop/ubuntu-make/ubuntu xenial InRelease Hit:17 http://ppa.launchpad.net/webupd8team/y-ppa-manager/ubuntu xenial InRelease Hit:18 https://packages.microsoft.com/ubuntu/16.04/mssql-server xenial InRelease Get:19 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages [540 kB] Err:19 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages   Hash Sum mismatch Get:21 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main Translation-en [218 kB] Get:22 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main amd64 DEP-11 Metadata [298 kB] Get:23 http://eg.archive.ubuntu.com/ubuntu xenial-updates/main DEP-11 64x64 Icons [193 kB] Get:24 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 Packages [7,776 B] Get:25 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted i386 Packages [7,792 B] Get:26 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted Translation-en [2,548 B] Get:27 http://eg.archive.ubuntu.com/ubuntu xenial-updates/restricted amd64 DEP-11 Metadata [157 B] Get:28 http://eg.archive.ubuntu.com/ubuntu xenial-updates/universe amd64 Packages [468 kB] Get:29 http://eg.archive.ubuntu.com/ubuntu xenial-updates/universe i386 Packages [453 kB] Fetched 847 kB in 6s (121 kB/s)                                                 Reading package lists... Done E: Failed to fetch http://eg.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/by-hash/SHA256/7ce67f72031f7cd7c4f24fffe8c90101935c8ae4e58502b1b60dfbb900f58841  Hash Sum mismatch E: Failed to fetch http://eg.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-i386/by-hash/SHA256/b4989c055e8da5afab24c96f86caf7157df19e46797e1217ad03a87d1b4a705a   E: Some index files failed to download. They have been ignored, or old ones used instead.   I have tried many solutions of similar related issue, but nothing worked for me :( Please help!  Edit: Solutions I found in Google that didn't work for me:

Whenever I click on software updater it says Failed to download repository information.  It's been saying this for the past few days now and I don't know why, my Internet connection is fine, I am able to manually download software.  Sometimes it crashes when I click okay, then attempts to look for updates again and gives me the same message.  Any ideas?  [EDIT] I just tried an answer posted where I reset where the downloads come from, but I was left with this message:  W:The repository 'http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu xenial Release' does not have a Release file.,  W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.,  W:See apt-secure(8) manpage for repository creation and user configuration details.,  W:https://content.runescape.com/downloads/ubuntu/dists/trusty/InRelease: Signature by key AAC9264309E4D717441DB9527373B12CE03BEB4B uses weak digest algorithm (SHA1),  E:Failed to fetch http://ppa.launchpad.net/noobslab/noobslab-conky/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found,  E:Some index files failed to download. They have been ignored, or old ones used instead.


I am looking to recall a book I read 20 years ago.     A journalist/anthropologist man (human) studies aliens.  He uses various techniques to get close to hard to study aliens. He starts to use tech to modify his body so he can get closer to the aliens or study them better. By the end of the book his body is so modified he no longer sees himself as human, and indeed has more or less forgotten his human roots. It was in English. "by the end of the book" he was modified and no longer saw himself as human (ergo... nothing happened after that, that was the end of the book). His motivations are (journalist/anthropologist) he was there to simply study the aliens (there may have side stuff to that plot, I forget). How he modified himself (to the best of my memory) = technology. (surgery, and part grafting and other I do not recall). What he learned from the aliens (their physiology and culture). Where was he studying them? = On their home worlds. How did he get access to them? = I don't fully recall (space flight seemed to be a thing, but unimportant to the plot). Was their presence known to other humans? (Sorta, kinda like Jane Goodall, he would go find new species and study them, I don't recall how the rest of the books universe heard of the aliens.)  It was a standalone book, not a part of a series. It was fairly short, maybe... 350 pages or so. Each chapter showed the protagonist's mind having slightly more trouble with human concepts or speech patters.  It is somewhat like reading the protagonists' 'journal'.

I'm trying to remember the title of a story i read where a man is hired to research primitive aliens by being altered surgically or genetically to live as one of them. The only catch is he can never go back to being human. After several different body changes, the main character is told he can be modified one last time, and he can pick what he wants. He chooses to become a being with the best aspects of all the different aliens he experienced.


Running: Ubuntu 18.04, Nginx 1.14  I read somewhere that running Wordpress in 'fs_direct' mode is a security threat, so I wanted to completely scrap that idea and stick to a local ftp server instead.  Here's the issue, I have the two users, www-data (what the server can run/see) and webftp (what Wordpress can upload through vsftpd). I can't have www-data run full permissions for obvious security reasons, but I need webftp to be able to write.  What is the BEST way to run these permissions side-by-side so they don't interfere with one another?  While I am good at most things linux, linux permissions are very confusing to me, so please be patient :)

I have an ec2 instance on AWS which already installed a few Wordpress-es in it.  I want to set things up to let more people handle their own projects, with me also being able to go into the server using terminal if I still want to.  I have been following tutorials such as  and a few others.  I figured all of them just teach users how to sftp into their own home folder, also the steps keep saying addUser but some users already existed and removing them might cause some issue.  How can I give existing users the permission to use SFTP for Wordpress projects?  Let's say all my Wordpress projects are already under /var/www/ which has already been set up with www-data:www-data.  Really new with setting things like this.  Thanks in advance for any help.


I'm trying to use Apex Managed Sharing to create share records when a record is created, but I'm running into a bit of an issue when Customer Community Plus Login Users create the records...  A user with a Customer Community Plus Login license is unable to see the Shares relationship on the Case object.  @isTest static void CustomerCommunityPlusLoginUserShouldBeAbleToSeeTheSharesChildObject(){     String objectName = 'Case';     SObjectType shareObjectType;     Test.startTest();     System.runAs((User)[select Id from User where IsActive = true and UserType = 'PowerCustomerSuccess' limit 1]){         for(ChildRelationship childRelationship : Schema.getGlobalDescribe().get(objectName).getDescribe().getChildRelationships()){             if(childRelationship.getRelationshipName() == 'Shares'){                 shareObjectType = childRelationship.getChildSObject();                 break;             }         }               }     Test.stopTest();     System.assertNotEquals(null, shareObjectType); }   This test method will fail with: "System.AssertException: Assertion Failed: Same value: null"  I would really like it to find the Share object with these users... Is there a reason for this, or a way that I can change/fix this?

We had a small widget that allowed customers to share records that were set to a private sharing model in our community. Everything was rather simple and it would simply allow them to select users that were visible via Sharing Sets and create an __Share record in APEX.  I've been reported recently that an error is thrown but only on the community side of things. Nothing seems to be working where it was working. We are using    Customer Community Plus licenses.  The error being thrown is : System.TypeException: DML operation INSERT not allowed on <Object>__Share which seemed to indicate access not available on the object. That seems odd because they are able to interact with the object just fine in order to create/edit/delete them.  I looked up the Sharing Model (its private both internally and externally), I looked at the profile and their access and the sharing sets in the community. Like I said, they seem to interact fine with the objects when it comes to seeing the records and their right.  Additionally, standard license users can use the component fine and also share with community users without a problem. They also see the records as expected.  Am I missing an update or something that seem to make it so this doesn't work anymore? Anyone having trouble with this or encountered the same problem?


Things in the design world seem to be getting flatter! I can produce infinite examples; iOS7, Windows 8 (and everything else in Windows 8), Pepsi, the Dropbox logo, even things outside the computer world; everything is flatter now.  When Windows XP was released, the trend was to give a curve to everything, and it looked better! Now, getting rid of those curves looks better!  Who governs this and why do flatter icons and logos look better now?        EDIT: And a newer trend of making things round is catching up:

I've noticed an interesting phenomenon in the user interfaces of many famous applications, they're moving away from the glossy complex to a more dull and bare minimum design.  Why the sudden change? It also appears that most of these companies have adopted this design around the same time, was that linked to some new study?  Examples:


Is there a way to get access to the 'Review Queues' feature of Stack Overflow from the Stack Exchange application for Android phones?

I know there are some similar posts on adding review queues to the mobile web page. However, this is regarding the Stack Exchange Android app. I really would like to review posts and edits from the Android app, however this isn't included in the app yet. I'm not sure how it would be implemented; maybe there could be a button or something for review. Could we please see this?


I had 2 SSDs installed on my machine.I had installed both OS on my 2nd SSD. At that time everything boot ok from my grub menu. But once, I removed first SSD, my grub menu broke, nothing booted. After applying boot-repair with live USB drive now I only can find ubuntu on my grub menu. My sudo os-prober command showing my windows partition: user@hp-elitebook-8470p:~$ sudo os-prober [sudo] password for user:  /dev/sda1:Windows 10:Windows:chain  But running sudo update-grub not adding my partition into GRUB menu at startup. I had tried boot-repair. But, it didn't work. I can also see my win partion in gparted marked boot.   I had tried this  from  and rebooted and GRUB menu is unchanged. grub-customizer screenshot:  Anything I am missing? Thanks In Advance.

I installed Windows on my computer, followed by an installation of Ubuntu. However, now I'm unable to boot into my Windows install.  What can I do to fix this?


What would you call someone who loves music? For example, a person who loves books is called a bibliophile. Someone who loves movies is called a cinephile.  I am trying to write a character description - Matthew, a cinephile, bibliophile and a (word that indicates music-lover and preferably ends in -phile).

To help a soon-to-be sister site out , I was thinking English.SE perhaps could lend a helping hand as this is the best place for "word choice and usage".  I'm not looking for "naming", but rather want to see what shorter words exist for expressing "music end-users/enthusiasts", these could be "journalists, reviewers, music fans and listeners".  I've tried, but can't come up with something... . From Urban Dictionary I have  which is another word for a Music enthusiast of the Modern age; but yeah, it's UD and I don't think selvyn is really English to begin with...  So... do you know of a single word to express "music end-users/enthusiasts"?


So ARandR is great for setting up my monitor layout in Lubuntu 12.10 but even if I save the layout to the  ~/.screenlayout   it doesn't seem to save that layout no matter what I call the file.

I used to edit the startup script for the GDM (/etc/gdm/Init/Default) to permanently change my display resolution.   How can I do this with LigthDM in Ubuntu Oneiric?


I'm studying machine learning and one of the key points I make sure is to understand the origin and the reasoning why such a name or term is used. It could be a rich and insightful dive into the concept it is trying to convey.   So, about bias-variance trade-off. Why use the word 'bias'?   In the usual, everyday parlance, 'bias' means leaning towards one side. If in the case of explaining pros and cons of a certain ideology, to be 'biased' means to give an unbalanced view and lean towards something.   Can we say the same for machine learning?   Thanks

I'm struggling to grasp the concept of bias in the context of linear regression analysis.    What is the mathematical definition of bias? What exactly is biased and why/how? Illustrative example?


Can someone please show me how these are equivalent in steps$$\frac{(h_2^2 - h_3^2 )}{\dfrac{1}{h_3}-\dfrac{1}{h_2}}=h_2 h_3 (h_2+h_3)$$ I thought it simplifies to $$(h_2^2-h_3^2)(h_3-h_2)$$This would be much appreciated, I cant wrap my head around it.

Can someone please show me how these are equivalent in steps $\frac{(h_2^2 - h_3^2 )}{\dfrac{1}{h_3}-\dfrac{1}{h_2}}=h_2 h_3 (h_2+h_3)$ I thought it simplifies to $$(h_2^2-h_3^2)(h_3-h_2)$$This would be much appreciated, I cant wrap my head around it.


In grade school, it was taught that commas represent pauses in speech. The teacher often said to read sentences aloud and place commas wherever there was a short pause.  Yet there are various authorities online that say this is a terrible idea. For example,  tells readers that "this well-meaning advice is hopelessly misleading."  But then there are also some that are for the punctuate-by-breath method.  writes:      These rules may seem complicated. But there’s a simple test that usually works: When in doubt about whether or where to place a comma, read aloud the sentence in question, and visualize the comma as a hook that briefly makes the sentence run in place. If you hesitate or pause, insert the hook in the sentence to mark that place. If you don’t, don’t.    Is it a reliable rule of thumb? Or something that should be abandoned altogether?

More often than not, I find myself using a comma as sort of a pause. In most cases, it feels right. But I fear that I overuse commas and put them in places where they are not necessary. Some examples:   Both of which, are valid.  I was going to go to work but, I felt sick.    I find myself using commas after words like "but" or "then". Most reference works I've consulted have defined these commas as a preference. Am I completely wrong here? Am I overusing commas and confusing my readers? Any additional documentation on commas of this type would be greatly appreciated.


Let $S$ be any set of axioms extending ZF. Suppose $\phi_1, ... \phi_n \in S$. Show that, if from $\phi_1, ... \phi_n$ one can prove all axioms of $S$, then $S$ is inconsistent. Conclude that ZF is not finitely axiomatizable.  So in order to show that $S$ is inconsistent, I need to show $S \vdash (\phi_1 \land ... \land\phi_n )$ and $S \vdash \lnot (\phi_1 \land ... \land\phi_n )$. But how do I do this and how do I conclude that ZF is not finitely axiomatizable?

As we know a first order theory $T$ is finitely axiomatizable if there is a finite set $F\subseteq T$ of axioms such that $F\vdash \sigma$ for every $\sigma \in T$.   How we can prove if $\mathsf{ZF}$ is consistent, then $\mathsf{ZF}$ is not finitely axiomatizable? By using the Reflection Theorem or any other if we could use?


I have a sign in form where userid is email id of users or unique id given by us i.e in integer.  So i want regex for that text box to validate email or Id.  Means.  if someone enters   abc@abc.com or 1024 then it is valid  and if someone is entering anything other than email or integer than it should show as invalid.  Thanks...

Is there a regular expression to validate an email address in JavaScript?


How much beef brisket and how much pork butt  should I buy to feed 40 people. 95 % men. They will be making sandwiches and have slaw and dessert .Needed right away. Thanks..

Catering a small event tomorrow for twenty people. Serving beef brisket, pulled pork, and veggie lasagna. Question is how much brisket & pork should  allow for each person? also serving  three sides, rolls, etc.


I need a .bat file compatible from windows 7 to windows 10 which concatenates 2 files  For example  file1.txt:  hello   file2.txt:  world   After running the batch script, a new file called file3.txt will contain the contents:  hello world   A newline should be added after the contents of file1

I have 50 text files in one directory.  Is there a Windows command-line method to concatenate those files into a single file?  I am using .  I don't want to type the name of all files.


We are having issues with mouse behavior in Linux.  In Windows:  In any application, to open a context menu and select an option:   right mouse button down + release move the cursor to an option left mouse button down + release   In Linux, the same thing can be done in:   right mouse button down move the cursor over to an option release right mouse button.   We are having problems in Eclipse, when accessed from a remote X server on Windows. The padding between the Eclipse menu items and the mouse cursor is too low (mouse cursor is inside the menu). Whenever we press the right mouse button down, mouse cursor is already moved over onto the immediate menu option, and when we release, selection event is triggered.   How to disable this behavior?

Whenever I right click in X, I almost always seem to trigger the first option in the menu unless I am thinking about what I am doing because I:   Mouse down; menu appears Accidentally drag mouse 1-3 pixels down and/or to the right Mouse up; menu item selected   Is there any way to tweak this so the menus don't trigger quite so easily? If it matters, I am using Gnome 3/Cinnamon on Gentoo Linux.


I am running macOS Catalina, on a 2017 MacBook Air Recently I moved the I-Movie Library off of my mac, and onto an External Hard Drive. So I checked My storage and it said 30 gigabytes free. Then 3 days later, I checked again, and the storage was almost full. I hadn't downloaded any big items, so I was very confused. Here I am now with Final Cut Pro, telling me my hard drive is full. Is something eating up my hard drive? Apologies for poor use of StackExchange, this is my first post.

Every few days I get notices on my MacBook that it's running or run out of hard drive space. Curiously, restarting the computer will enable me to recover gigabytes of space (this past time, it was able to recover about 2.2GB). However, I can't identify anything in my personal activity that consumed that space.  It's possible that it's a rogue iTunes podcast or a huge software update that my Mac is automatically downloading - would either of these reclaim the space upon a restart?  One possibility that I can think of is that FileVault has some sort of disk leak, allocating but not freeing files. Does this make sense? Is there a tool that I can run to determine where this space is going? Assuming it is FileVault, should I try to disable it? What's the best way to turn of FileVault on a nearly full computer?


School of Evocation Wizards in 5E gain Overchannel at level 14. It states:     When you cast a wizard spell 1st through 5th level that deals damage, you can deal maximum damage with that spell. The first time you do so, you suffer no adverse effect.    If you use the feature again it gets progressively worse.    Do you have to announce that you are using Overchannel before or after determining if a spell hits or the target fails their save?  Something like: First, declare "I'm Overchanneling Chromatic Orb" (or hopefully something more flavorful)... Then, if it hits, it deals max damage but if it misses the Overchannel is wasted.  Alternatively, can you wait to see if the Chromatic Orb hits and then say, "Seeing its effectiveness I channel all of my energy to enhance it -- Overchanneling" (or again some other flavorful speech)

The Evocation specialist wizard's overchannel ability says:     When you cast a wizard spell of 5th level or lower that deals damage, you can deal maximum damage with your spell.   Does the "that deals damage" clause mean the wizard can decide to overchannel once they are sure the spell is going to deal some damage?  i.e., that it is not counterspelled or evaded by a successful save, etc.   (This would be similar to paladins being able to choose to apply smite damage after they know they have hit, so this kind of post-hoc add on is not unprecedented.)


Suppose $f$ and $g$ are holomorphic in a region containing the disc $|z|\leq 1$. Suppose that $f$ has a simple zero at $z=0$ and vanishes nowhere else in $|z|\leq 1$. Let $$f_{\epsilon}(z)=f(z)+\epsilon g(z).$$Show that if $\epsilon$ is sufficiently small, then (a) $f_{\epsilon}(z)$ has a unique zero in $|z|\leq 1,$ and (b) if $z_{\epsilon}$ is this zero, the mapping $\epsilon\to z_{\epsilon}$ is continuous.  I have been asked to solve the question as homework. Part (a) is actually trivial by applying Rouche's Theorem since $f$ and $g$ are holomorphic and we have $$|f(z)|>\epsilon|g(z)|$$ when $\epsilon$ is sufficiently small. But Part (b) is difficult for me. As the exercise show, the zero $z_{\epsilon}$ is a function of variable $\epsilon$, and I don't know how to determine where is the zero $z_{\epsilon}$. I can never show $$\lim_{h\to0}(z_{\epsilon+h}-z_{\epsilon})=0$$without knowing the exact expression of $z_{\epsilon}$. So I decide to consider the inverse map: $z_{\epsilon}\to\epsilon$. And I get $$\epsilon=-\frac {f(z_{\epsilon})}{g(z_{\epsilon})}.$$ This is a continuous function. Can I end proof by saying "Since the inverse function is continuous"? Or my consideration is actually wrong? HELP! Please show me the correct proof or the right way solving the exercise.

Suppose $f$ and $g$ are holomorphic in a region containing the disc $|z| \le 1$. Suppose that $f$ has a simple zero at $z=0$ and vanishes nowhere else in $|z| \le 1$. Let $f_\epsilon (z) = f(z)+\epsilon g(z)$. Show that if $\epsilon$ is sufficiently small, then (a) $f_\epsilon (z)$ has a unique zero in $|z| \le 1$, and (b) if $z_\epsilon$ is this zero, the mapping $\epsilon \mapsto z_\epsilon$ is continuous.    I already solved (a) by applying Rouche's theorem, but (b) is such a nuisance to me. I first tried the classical $\epsilon - \delta$ method, but it didn't work. However, I couldn't find any other ways to prove the continuity. Since $f$ has a simple zero at $z=0$, I found that $f(z)=zh(z)$ for some $h(z)$ that is holomorphic and non-zero in the unit disc and $z_\epsilon h(z_\epsilon) = -\epsilon g(z_\epsilon)$. Am I on the right track? I don't know how to proceed from this.


Is it possible to write records to the ExternalDataUserAuth object via Apex code? When I try to write some Apex code to insert records into the ExternalDataUserAuth object I get an 'illegal dml object' message. I know that you can create records manaually using the UI but our solution requires that we create these records automatically via code. Any help appreciated.

My question is almost similar to one mentioned in 'Auth Provider with per-user Named Credential' (). I am trying to authenticate and make a API call when a new or existing Salesforce community users try to log in. The Authentication is provided by 3rd party (Cognito). So, the requirement is :  User to be authenticated using the 3rd party system for login. After successful authentication and before community page is displayed, the API call is to be made to 3rd party system to get more details about the user.  In order to achieve this:  Created an Open ID Connect Auth. Provider Use the registration handler on the Auth. Provider to create/link a new/existing user. Use a login flow for API call. Use Per User Identity Type Named Credential to make API calls.  No, where I am having issue is once the user has authenticated successfully, how do I allow the user to make API call without authenticating it again. I am getting the error: An Apex error occurred: System.UnexpectedException: You don't have permission to view this data, enter credentials for the named credential in your personal settings. Or ask your Salesforce admin for help. I believe this error is due to the fact that the user is not listed under 'Authentication setting for External Systems'. My requirement doesn't allow me to authenticate the user again, so how do I achieve this using either APEX or any other way?


root@campaigns:/var/lib/dpkg/info# apt-get -f install Reading package lists... Done Building dependency tree        Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. perl: warning: Setting locale failed. perl: warning: Please check that your locale settings:     LANGUAGE = (unset),     LC_ALL = (unset),     LANG = "en_IN"     are supported and installed on your system. perl: warning: Falling back to the standard locale ("C"). locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory Setting up etcd (2.2.5+dfsg-1ubuntu1) ... Job for etcd.service failed because the control process exited with error code. See "systemctl status etcd.service" and "journalctl -xe" for details. invoke-rc.d: initscript etcd, action "start" failed. ● etcd.service - etcd - highly-available key value store    Loaded: loaded (/lib/systemd/system/etcd.service; enabled; vendor preset: enabled)    Active: failed (Result: exit-code) since Wed 2017-07-19 16:18:52 UTC; 9ms ago      Docs: https://github.com/coreos/etcd        man:etcd   Process: 13475 ExecStart=/usr/bin/etcd $DAEMON_ARGS (code=exited, status=1/FAILURE)  Main PID: 13475 (code=exited, status=1/FAILURE)  Jul 19 16:18:52 campaigns etcd[13475]: etcd Version: 2.2.5 Jul 19 16:18:52 campaigns etcd[13475]: Git SHA: Not provided (use ./build instead of go build) Jul 19 16:18:52 campaigns etcd[13475]: Go Version: go1.6.2 Jul 19 16:18:52 campaigns etcd[13475]: Go OS/Arch: linux/amd64 Jul 19 16:18:52 campaigns etcd[13475]: setting maximum number of CPUs to 2, total number of available CPUs is 2 Jul 19 16:18:52 campaigns etcd[13475]: error listing data dir: /var/lib/etcd/default Jul 19 16:18:52 campaigns systemd[1]: etcd.service: Main process exited, code=exited, status=1/FAILURE Jul 19 16:18:52 campaigns systemd[1]: Failed to start etcd - highly-available key value store. Jul 19 16:18:52 campaigns systemd[1]: etcd.service: Unit entered failed state. Jul 19 16:18:52 campaigns systemd[1]: etcd.service: Failed with result 'exit-code'. dpkg: error processing package etcd (--configure):  subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing:  etcd E: Sub-process /usr/bin/dpkg returned an error code (1) root@campaigns:/var/lib/dpkg/info#    I get the above error when I try installing anything. My Ubuntu version is 16.04.

I am getting this message every time I do something like starting or stopping a service.  perl: warning: Setting locale failed.    perl: warning: Please check that your locale settings:            LANGUAGE = "en_US:en",            LC_ALL = (unset),            LC_MESSAGES = "en_US.UTF-8",            LANG = "en_US.UTF-8"        are supported and installed on your system.    perl: warning: Falling back to the standard locale ("C").    locale: Cannot set LC_CTYPE to default locale: No such file or directory    locale: Cannot set LC_MESSAGES to default locale: No such file or directory    locale: Cannot set LC_ALL to default locale: No such file or directory    (Reading database ... 21173 files and directories currently installed.)   Removing bind9 ...    * Stopping domain name service... bind9                                        [ OK ] Processing triggers for man-db ...    locale: Cannot set LC_CTYPE to default locale: No such file or directory    locale: Cannot set LC_MESSAGES to default locale: No such file or directory    locale: Cannot set LC_ALL to default locale: No such file or directory      How do I fix this error ?


"Is not he calling me?"  "Isn't he calling me?"    Why is #1 not correct while #2 is correct? And what about the below:   "Is he not calling me?"   Does #3 always mean the exact same thing as #2 "Isn't he calling me?"

(1) Does he not know? (2) Doesn't he know?  I don't usually see and hear questions formed in the first style. I was even surprised to know that it is grammatically correct. And actually it is the most "proper" way to form an interrogative sentence.  shows that the first style was much more popular before than now. What are your suggestions on choosing between these styles? And I will probably add the third one.  (3) He does not know?  EDIT: The answers have explained how to form a question, but have not actually provided an account on the usage of the first two forms. Especially I'm interested in the first form: does it sound formal, is it used in speech or only in writing, et cetera.


I have this on latex \begin{equation} \begin{aligned} [A_i, A_j]&=i\varepsilon_{ijk}A_k\\ [B_i, B_j]&=i\varepsilon_{ijk}B_k\\ [A_i, B_j]&=0 \end{aligned} \label{eq:10} \end{equation}  and the output is:  Why isn't the [A_i, A_j] appearing? How can I fix it? Thank you.

\begin{equation}     \begin{aligned}         [c\mathbf{v}+c'\mathbf{v}',\mathbf{w}]=&c[\mathbf{v},\mathbf{w}]+c'[\mathbf{v}',\mathbf{w}],\\         [\mathbf{v},c\mathbf{w}+c'\mathbf{w}']=&c[\mathbf{v},\mathbf{w}]+c'[\mathbf{v},\mathbf{w}'],     \end{aligned} \end{equation}   In this code, [c\mathbf{v}+c'\mathbf{v}',\mathbf{w}] is not shown in the equation. Is it because of the aligned environment? How to fix it?


A helicopter just circulates air in a hover and maintains a stable altitude. So, how much energy is used to do this? Using the standard equation $KE = \frac12 mv^2$; then the kinetic energy used would be $0.5$ times the mass of air displaced down each second ($m$), times the vertical velocity of this air squared ($v^2$). Is this correct?     I couldn't find this in any engineering textbook. Estimates (guesses) from fuel burn is helpful, but are very inaccurate; as they rely on estimates (assumptions) of how efficient the fuel conversion to mechanical energy is, how efficient the motor is at using this energy, and then how efficient the rotors are at displacing air down. Which is too many assumptions.

This is likely to be very simple, but...  How does one calculate work done by a hovering unmoving aircraft over time?  As in work in Joules.  In this scenario, to remain hovering the aircraft has to exert a force that counters gravity (which would be its mass times G, pointing in opposite direction of gravitational pull).  However, work is defined as newton per meter, and the aircraft does not move.  Meanwhile the battery charge or fuel is going to be expended, so the energy is spent.  The other question here:   is dealing with conservation energy and not calculating drain/work performed by hovering.


I am writing a function normalize that prepares a string for processing. This is the code:   /* The normalize procedure examines a character array of size len   in ONE PASS and does the following:  1) turns all upper-case letters into lower-case ones  2) turns any white-space character into a space character and,   shrinks any n>1 consecutive spaces into exactly 1 space only  3) removes all initial and final white-space characters   Hint: use the C library function isspace()   You must do the normalization IN PLACE so that when the procedure  returns, the character array buf contains the normalized string and   the return value is the length of the normalized string.   */  int normalize(char *buf, /* The character array containing the string to be normalized*/             int len    /* the size of the original character array */)  {     /* exit function and return error if buf or len are invalid values */ if (buf == NULL || len <= 0)   return -1;   char *str = buf;  char prev, temp;  len = 0;   /* skip over white space at the beginning */ while (isspace(*buf))   buf++;    /* process characters and update str until end of buf */ while (*buf != '\0') {   printf("processing %c, buf = %p, str = %p \n", *buf, buf, str);     /* str might point to same location as buf, so save previous value in case str ends up changing buf */   temp = *buf;     /* if character is whitespace and last char wasn't, then add a space to the result string */   if (isspace(*buf) && !isspace(prev)) {     *str++ = ' ';      len++;    }     /* if character is NOT whitespace, then add its lowercase form to the result string */   else if (!isspace(*buf)) {     *str++ = tolower(*buf);      len++;    }    /* update previous char and increment buf to point to next character */   prev = temp;    buf++;  }   /* if last character was a whitespace, then get rid of the trailing whitespace */  if (len > 0 && isspace(*(str-1))) {   str--;    len--;  }  /* append NULL character to terminate result string and return length */ *str = '\0';  return len;   }  However, I am getting a segmentation fault. I have narrowed down the problem to this line:   *str++ = *buf;  More specifically, if I try to deference str and assign it a new char value (eg: *str = c) the program will crash. However str was initialize at the beginning to point to buf so I have no clue why this is happening.   *EDIT: This is how I am calling the function: * char *p = "string goes here"; normalize(p, strlen(p));

The following code receives seg fault on line 2:  char *str = "string"; str[0] = 'z';  // could be also written as *str = 'z' printf("%s\n", str);   While this works perfectly well:  char str[] = "string"; str[0] = 'z'; printf("%s\n", str);   Tested with MSVC and GCC.


my computer has 2gb ram and   is it possible to install ubuntu trusty tahr on my system and will it run smootly on my system

For a given hardware configuration, how do I find out if Ubuntu will run on it? What considerations should I take into account when choosing an Ubuntu version and  such as:    with a lighter desktop than the usual Gnome and Unity  with the even lighter LXDE desktop   Obviously Ubuntu does not run on some processor architectures. So how do I go about choosing the right version and derivate. How can I find out the minmal system requirements?


im trying to declare an array of three pointers to functions and invoke the appropriate function based on an index value passed in as an argument im getting confused,this is the code i wrote int brr,func,arr(int *a[3],float *b[5] ,char *c[6])  {     brr();`func();`     printf("%d\n",brr);     return 0;     }

How should I use array of function pointers in C?  How can I initialize them?


I need to find a sequence that satisfies the condition: $\forall p \in \mathbb{N}: \lim_\limits{n \to \infty } | a_n - a_{n+p}| = 0$ but is not a cauchy sequence.  This somehow implies for me that I need a convergent sequence to satisfy the condition, however this contradicts the second condition of the task, namely that  an  is not a Cauchy sequence.  So there clearly is something else I'm not taking into account but I can't figure out what. Please help me.

I'm doing exercises. In the related book, there is a claim. Is this right? I'm not sure.     For a sequence $\{a_n\}$, there exists a limit $a$ such that $\lim_{n\to\infty} a_n=a$ if and only if for any $p\in \Bbb N$, $\lim_{n\to\infty} |a_{n+p}-a_n|=0$   If not, could you kindly give some counterexamples?  Thanks.


In laTeX I have this line:  <onEntry>do_something </onEntry>   which is giving me this error:   $ l.28 <onEntry>do_ something </onEntry> I've inserted a begin-math/end-math symbol since I think you left one out. Proceed, with fingers crossed. ! Missing $ inserted.   I just want to write the line as it is... not special nothing.   And I have no idea how to solve this. I already search for this issue but all I found was real issues related to use of math symbol and not something like this... where there is no math at all.  Can you help me ?

How can I produce the text Word_one_two in LaTeX?  I tried:  Samp\_Dist\_Corr   But, it doesn't quite look right. Also, I want it in the typewriter font, so actually, I'm doing:  \texttt{Samp\_Dist\_Corr}   I find it looks a bit like the underscore is merging in to the bottom of the "D", but maybe it's just because of the typewriter D?


For example, when administering lethal injections, there are usually two buttons (each on its own harmless) that both need to be pressed by a person before it is administered.  Is there a name for such a system? I'm talking about a system that requires two people to interact to trigger the event, not a system that absolves one of them of guilt.

I am trying to think of what the name of the word/phrase is for when: An important task (not a difficult one, but a mission critical one) is at hand and instead of one person being assigned to it, a group takes on the responsibility to mitigate any consequences happening to one person in case something goes wrong and also to prevent a mistake or malicious intent occurring from one persons doing. (NOT because the task is big and needs to be divided in a group.) E.g.   Two different people needing to turn a key each in a device simultaneously to launch a missile.  Group of people tallying up votes for an election in case one of them were bridged to rig the outcome.


I am confused about rolling friction. When a wheel rolls, there is instantaneous static friction at the point the wheel touches the ground. This static friction is responsible for the wheel to roll and move forward. At the same time, is that friction wasn't present, the wheel would spin without rolling. Is this force the rolling friction? If yes, why we say that rolling friction opposes rolling then, as we saw it actually facilitates it? Also, I read that rolling friction makes a wheel decelerate as it rolls, how can that happen, as the friction actually facilitates rolling? In case the friction I previously described is not the rolling friction, which forces exactly constitute the rolling friction? And my professor said that rolling friction is actually dynamic and not static friction, how can that be since when a wheel rolls, the surface of the wheel that touches the ground is not moving (grips to the ground) in relation to the ground? If that grip is not efficient enough, then the wheel spins and doesn't roll. Please elaborate.

Please could someone help with some physics about resistive forces that would slow a ball down which is rolling across a floor. I have found conflicting bits of information about the effect friction has. If the ball grips the floor am I correct in thinking that there is no kinetic friction since the surfaces do not move relative to each other? There would be static friction of course but in terms of slowing the ball down would there be no frictional loses between the floor and the ball. My reasoning is that work done against the balls motion would be the frictional force multiplied by the distance it acts across but there is no kinetic frictional and static friction cannot do any work by definition as it is static? Is that right? Some bits of information I have found said friction does oppose the motion but I don't see how it can if the ball is not slipping as its rolling?


The way I have been trying works up until 03 and then skips the element. Now I understand that the array I am creating is a 3x3 so to say. I just do not understand how to create different lines of different lengths. Any help would be appreciated!   String[][] copied = new String[test._data.length][test._data[0].length];     for(int i = 0; i < test._data.length; i++ ) {         for(int y = 0; y < test._data[0].length ; y++)         {             copied[i][y] = test._data[i][y];         }     }   String[][] _data = {               {"A", "B"},               {"01", "02", "03"},               {"XX"}};

How can I deep copy an irregularly shaped 2D array in Java?  Ie.  int[][] nums =  {{5},                  {9,4},                  {1,7,8},                  {8,3,2,10}}   I'm unable to use Arrays.arrayCopy() for some reason (versioning?)


My misto sprays in a stream. I have cleaned it amd follow the instructions. What can I do to correct this problem?

I use a Misto oil spritzer. You fill it up with oil and pump it up and spray a pan with it.  It's gotten clogged up so that it just squirts a steady stream of oil (not a spray).  Any ideas how to clean it and keep it from clogging again?  I've tried:   Soaking it on wine Soaking it in boiling water   I'm going to try filling the bottle with vinegar and water.  I've also heard that you should use regular (not extra virgin) olive oil. (Extra Virgin is apparently thicker).


I know that using console commands will disable steam achievements in some games. Will using mods in e.g. Fallout new Vegas disable achievements as well?

I've heard mixed information on this and I'd like to get a straight answer, for two reasons:   The widely reported Quicksave/Autosave bug is annoying and, quite frankly, has terrified me into completely abandoning both features. However, manually saving is, to say the least, extremely cumbersome. In FO3, I used the console 'SAVE' command to create named save files without any menu navigation, and it was awesome. I've been afraid to do so in New Vegas however, for fear that, as reported, it will disable achievements on my save file. Similarly, now that the game has been out for a few days, Mods are beginning to appear, and a few of them look like big QoL improvements. Most notably, stuff like , to fix the horridly large print menus, and , to add Iron Sights to the Laser Pistol. But again, not worth it on my first playthrough if they ruin my hard earned Nerd Points on Steam.   Since I've heard conflicting information on this, I'd love to get a definitive answer, but sadly, having earned the 'low hanging fruit' achievements you can get without a whole fresh playthrough or a lot of grinding with a specific weapon type, I have no easy way to test this.


Let $R$ be a commutative ring.  Then, is it possible to extend this to have a unity?  That is, is there a commutative ring with unity $R'$ such that $R$ is a subring of $R'$?

Let $R$ be an rng. (There may be no unity)  Then, does there always exist a ring(with unity) $A$ such that $R$ is a subrng of $A$?


I have just attempted to update my iPhone 4 to iOS 7. The phone switched itself off after a while and now the phone won't work any more. The screen switched back on with the logo of iTunes and the charger with an arrow pointing to the iTunes logo.  I connected the phone to my Mac and it doesn't recognise my phone at all, asking to restore it to the factory setting. If I do that, would I lose everything on it?

I'm not really sure how, but after I woke up today, my phone was just displaying the loading spinner and doesn't start up anymore. It's weird because my phone turned off last night and suspecting that it was probably out of charge, I thought charging it overnight would fix the problem.   So, my iPhone is currently stuck on the iTunes/Apple Logo loop. When I put it into DFU/Recovery Mode and connect it to iTunes, it isn't able to restore it. It keeps throwing "Network Connection Problems" -- it downloads iOS 10 for a bit and suddenly stops downloading, throwing the error. I've also tried downloading a custom .ipsw from  but it seems that the file is corrupted whenever iTunes tries to unpack it.   Any thoughts on how I could go about fixing this?   Note - I don't have a jailbroken iPhone.


Time can be saved by answering things like,      "I have X and want to get Y. What are some development tool/libraries/framework options that can achieve this that you'd recommend?"   These kinds of questions have value, and currently lack an appropriate home. I did some checks in meta for this before asking, but I'm assuming over the years I'm not the only one whose asked something similar to this, so I apologize if my queries were left wanting.

Stuff like polls, recommendations based on subjective constraints, puzzles, webcomics etc. do not belong on the serious main SE sites, where professionals should be considered at work and having just a few spare minutes ("code's compiling") to answer questions, so they should not be distracted by such things. However, I'd also like to have a home for these things still using the SE engine. For the reason I mentioned before, this needs to be a separate place though. Let's call it four.[sitename-here].com.


I notice the latest build is 2.77, and I only have 2.76. Do I just download the latest version from the blender website, or is there a way to update from within Blender, or what?

I currently have version 2.74. How do I update to version 2.76? I do not see any links in the UI to update my version of Blender


I'm at a point where I have around 40 cities (I kept playing after winning just for fun) and the stats screen popped up for "Most Well Fed" and I noticed my number was extremely low. I have farmland up the wazoo, so I was wondering which cities weren't so well-fed so maybe I could work on getting those specific ones some food, or halt population growth there so they don't run out of food.  I can't seem to find any screen that will outline all my cities and how much food they have, but I don't really want to click through every single city to look at the stats. I know that when a city starts starving, the red citizen icon will start appearing to notify you of that, but I'd rather not wait until that point because that will affect happiness until that extra citizen dies off from the food shortage.  Is there any simple way to view the food (and possibly other) stats for each city all at once? Or perhaps some other way to find starving cities?

I have many cities on Civ5 cause I annexed them and they start to demand Luxury Resources for We love the king day. Is there any City overview on which you can see the items they want or progress?. I have checked the overviews (diplomatic,military,economic) but no info related to this.


Prove that   $$a^ab^bc^c\ge(abc)^{(a+b+c)/3}$$  where $a,b,c\in\mathbb{R^+}$  I tried using powered AM-GM but didn't get anything. please give me a hint to solve it.

Prove that the following inequality holds   $$a^a b^b c^c\ge (abc)^{\frac{a+b+c}{3}}$$   if $a,b,c$ are positive.   I'm not sure how to handle these kinds of powers. Are there any "famous" but not so advanced inequalities that involve this kinds of expressions?  I was trying to do something like ordering them without lost of generality because it's symmetric, but I get nowhere and I just make the thing even more complicated.  I'm asking for solution rather than hints since this is my first time encountering these kinds of problems.


Short story about a young woman who is deliberately infected with life-preserving and repairing nanites. She lives through the end of humanity and the death of the universe as the nanites constantly fix her.

Trying to find a short story. I first read it approximately five years ago. It was part of a short story collection from various authors. I can only guess at the original published date, but the paperback I read it in was in good condition and seemed fairly new. Written in English.   Story focused around a woman, who for some reason had been injected/infected with a form of nanotechnology (I think that was the term used). These nanobots initially repaired any injury or damage the woman received. However as the years pass the nanobots have repaired so much of the woman that little or no flesh or blood exists, even replacing elements of the brain. The woman is still lucid and self aware.   The consequence of the repairing is the woman is now unable to die, and immortal (I think). As the years pass by she witnesses the end of the earth and the death of the sun in a supernova.   This is as far into the story as I can remember. If an answer was to include where I can read the story again that'd be great.   I'm familiar with many of the works of classic sci-fi authors, and I believe if I'd heard of the author before I would have remembered their name, and therefore found the story myself.


is defined as : $e^{e^{e^{79}}}$ , I seek for the mathematical reasons which let $e^{e^{e^{79}}}$ conjectured to be an integer  ?

In , I needed to assume in my answer that $e^{e^{e^{79}}}$ is not an integer. Is there some standard result in number theory that applies to situations like this?   After several years, it appears this is an open problem. As a non-number theorist, I had assumed there would be known results that would answer the question. I was aware of the difficulty in proving various constants to be transcendental -- such as $e + \pi$, which is not known to be transcendental at present.   However, I was looking at a question that seems simpler, naively: whether a number is an integer, rather than whether it is transcendental.  It seems that what appeared to be possibly simpler is actually not, with current techniques.   The main motivation for asking about this particular number is that it is very large. It is certainly possible to find a pair of very large numbers, at least one of which is transcendental. But the current lack of knowledge about this particular number is even an integer shows just how much progress remains to be made, in my opinion.  Any answers that describe techniques that would suffice to solve the problem (perhaps with other, unproven assumptions) would be very welcome.


I just received an email that had the following sentence,      We have plenty of magic that will pique your and your customers' interest.   Aside from the obvious errors, do we use "you" "yours" or "your"?  EDIT The original sentence, verbatim:      "We have plenty of magic that will peak your & your customers interest."

When adding possessive-S/apostrophe to a list, the rule is only the last person has the apostrophe if the item is shared, or everyone has one if they have the items each, e.g.  John and Mary's houses = the houses that belong jointly to John and Mary.  John's and Mary's houses = the houses that belong to John and Mary as individuals, at least one each.  However, I am curious if the rules are slightly different when possessive pronouns are used for a single item.  You and Mary's house OR your and Mary's house?  I'm even more unclear when the first person is involved.  Mary and my house OR Mary's and my house?  Finally, when there are at least three people, including the first person, does the last named person have the possessive-S/apostrophe, or all/none of them?   John, Mary and my house John, Mary's and my house John's, Mary's and my house   I'd be very grateful to anyone able to clarify this, ideally with a some form of reference, as I can't find it anywhere.    There have been several suggestions to use "our", yet if the text refers to a group of people, all of whom own co-own houses with some others within the group*, then the above style wording would be necessary, so my question stands.  * eg I own a house with John and Mary, I co-own another with Peter and yet another with Philip and Sarah.


I wonder what happens if too many investors want to purchase a given ETF. On one side, the ETF share price is  the sum of the ETF holdings divided by the number of ETF shares, since deviations are corrected by  (). On the other side, unless more shares are issued, the price should raise. Does this mean the ETF managers issue more shares if too many investors want to purchase a given ETF?

I am trying to fully understand how ETFs work. For the sake of simplicity, let us restrict ourselves to physical replica ETFs. Let us suppose that an ETF follows an index which tracks three stocks: Alice Enterprises (A), Bob Industries (B) and Charlie's (C). We want to invest 1000$. The prices of each individual stock are 100$ (A), 10$ (B) and 1$ (C). The index weights at this moment are 60% (A), 30% (B), 10% (C). If I am not mistaken, when we buy a fund tracking this same index, the fund manager will automatically buy 600$ of A, 300$ of B and 100$ of C. Now, if we buy an ETF the underlying process is unclear to me. I understand the concepts of authorised participant and NAV spread. If A increases its value to 110$, authorised shareholders will first withdraw shares of A from the ETF and sell those shares, and then they will buy the ETF, pushing the ETF price upwards. This way the ETF price is automatically regulated and the authorised shareholders earn a profit. Everybody is happy. In contrast to a fund, when we buy an ETF we are not generally buying ETF shares from the ETF manager. Instead, we are buying ETF shares from another investor. Therefore... as I understand it, no new shares are really bought. And thus, following the process above, if we buy the ETF we push its price upwards. This again creates a "gap", this time the price of the ETF is momentarily higher than its underlying assets and, therefore, authorised shareholders will sell ETF shares and buy shares of A, B and C. So... an ETF manager only buys a fixed amount of shares when the ETF is created? I want to know if I am correct in this reasoning about how the basics of physical ETFs work. I have tried to keep things as simple as possible. I understand that there will be lots of quirks and quincks, and it is great if these are elaborated in the answers.


I'm new with Mactex and I've been trying to insert references; however, even when I use the sample templates, the question mark is printed instead of citation number and my references does not print. Here is sample of my code and the printed document: sample of "references.bib" file:  @article{einstein,   author =       "Albert Einstein",   title =        "{Zur Elektrodynamik bewegter K{\"o}rper}. ({German})                  [{On} the electrodynamics of moving bodies]",   journal =      "Annalen der Physik",   volume =       "322",   number =       "10",   pages =        "891--921",   year =         "1905",   DOI =          "http://dx.doi.org/10.1002/andp.19053221004" }  @book{latexcompanion,     author    = "Michel Goossens and Frank Mittelbach and Alexander Samarin",     title     = "The \LaTeX\ Companion",     year      = "1993",     publisher = "Addison-Wesley",     address   = "Reading, Massachusetts" }  @misc{knuthwebsite,     author    = "Donald Knuth",     title     = "Knuth: Computers and Typesetting",     url       = "http://www-cs-faculty.stanford.edu/\~{}uno/abcde.html" }   and here is sample of my main code:  \documentclass[a4paper,10pt]{article} \usepackage[utf8]{inputenc}  \usepackage[square,numbers]{natbib} \bibliographystyle{unsrtnat}  \title{Bibliography management: \texttt{natbib} package} \author{Share\LaTeX}  \begin{document}  \maketitle  This document is an example of \texttt{natbib} package using in bibliography management. Three items are cited: \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Einstein journal paper \cite{einstein}, and the Donald Knuth's website \cite{knuthwebsite}. The \LaTeX\ related items are \cite{latexcompanion,knuthwebsite}.   \medskip  \bibliography{references}  \end{document}   and this is the printed document:   Akso, this is the warning that I get:  Package natbib Warning: Citation `knuthwebsite' on page 1 undefined on input li ne 14.  No file bib.bbl.  Package natbib Warning: There were undefined citations.

I've browsed the forums and found a number of posts that have addressed this issue, but none of the solutions seem to work for me. I have the following script that I just copied from the bibtex home page to get familiar with it. Instead of the citation number I get a question mark. I compile using Latex+Bibtex+Latex+Latex+PDFLatex+ViewPDF just as has been previously suggested and the problem persists.   \documentclass[11pt]{article} \usepackage{cite}  \begin{document}  \title{My Article} \author{Nobody Jr.} \date{Today} \maketitle  Blablabla said Nobody ~\cite{Nobody06}.  \bibliography{mybib} \bibliographystyle{plain} \end{document}   My bibliography (Bib.bbl)  @misc{ Nobody06, author = "Nobody Jr", title = "My Article", year = "2006" }    Looking at previous posts one thing that is concerning is that my .bbl looks empty as shown below. Further, I don't have a .blg  \begin{thebibliography}{}  \end{thebibliography}


I wanted to start working on my Blender file in the 2.8 version and when I started working in my existing 2.79 file in the 2.8 version i couldn't access the object that where on another layer in blender 2.79.  The objects do appear in the outliner but in a darker gray and I can't see them. Does anyone know how to fix this?

I've bought Cup models from Internet.   When opening .blend file I get Blender's Interface changed. To avoid this I've unchecked "Load UI" on opening the file.   But now I cannot see the objects of the project (I can see and render them when opening the file and leaving "Load UI" checked).   "Collection 1" on the "Objects Panel" (Don't know if it is it's name). is grayed out.   cup-models.blend with LOAD UI:    cup-models.blend without LOAD UI:    Blender 2.8:


I have been accepted for a Masters degree in Finland. Because of this, I have already applied for the Finnish Residence Permit starting 1st August 2015. However, I wanted to visit Germany for a month before I start my master's study. I have been invited by a family friend for a month to travel and celebrate their grandparent's 50th anniversary.    When inquired about it at the Finnish embassy they mentioned that I cannot go to any other Schengen country before 1st August as I need to first enter Finland using my residence permit and then can go to any Schengen country. I also cannot apply for a separate German Schengen visa from 1st July 2015 to 31st July 2015 as one cannot hold two Schengen visas at the same time.   My doubt revolves around the last statement. Since the dates for my application to German Schengen visa doesn't overlap the Finland Residence permit dates, can I still apply for German tourist visa from 1st July to 31st July 2015? Also can I travel to Finland from Germany?

In case, if I get a multiple-entry Schengen visa in one of the embassies in Ukraine, Kyiv - should my first trip be to the country which issued the visa?  Any there any requirements of this sort? Does this condition vary depending on embassy which issued the visa?  What are the possible consequences on not visiting that country first? Does it somehow depend on country where the embassy is (i.e. non-Schengen and not EU members)?


I am a Taiwanese passport holder , will travel to Europe transit in Istanbul for 2 hours (inside airport only) , do I need to apply for a transit visa or an e-visa?

I'm Egyptian and flying to Cairo from Tbilisi, via Istanbul. The first flight Tbilisi-Istanbul is on Atlasjet, then from Istanbul to Cairo I am flying on Egyptair. For that, I have to recheck in at Istanbul to my Egyptair flight  Will I need to pass passport control at Istanbul airport to collect my bags and check in on Egyptair? Will I need a transit visa for that? Or it can be all done through neutral zone?


I just installed Ubuntu 19.10 with GNOME Shell 3.34.1 and I would like to use gnome-shell-extensions using extension in Chromium browser, so I installed .  However, when I go to , an error appears:     Although GNOME Shell integration extension is running, native host connector is not detected.   I found a  with same problem, so I also install:  sudo apt install chrome-gnome-shell libproxy1-plugin-networkmanager   However, even after computer restart, error message is still there. I have same problem in Mozilla Firefox.   I installed Chromium as   sudo snap install chromium   and Firefox from Ubuntu Software Center.  Is there any way to find out what is wrong?

Got an error from Firefox saying :      Although the GNOME Shell integration extension is active, the native host connector is not recognized. Please consult the installation manual.   Which is an error that seems to never happen, I'm using Ubuntu 18.04 (Dual Boot Windows 10), and yes GNOME shell is installed via   sudo apt-get install chrome-gnome-shell   I'm using Firefox v64.0.2 (64 bits) snap.  Could someone help?


Due to my dataset having some values much greater than others, I tried using the log scale on Y axis. How can I display my data as is, meaning 40 on the first bar, 42.69 on the second, etc?   \begin{figure}[!htbp] \centering \begin{tikzpicture}     \begin{axis}         [ybar=2pt,         width=16cm, height=8cm,         bar width=8pt,         enlarge x limits=0.1,         enlarge y limits=0.25,         legend style={at={(0.5,0.95)}, anchor=north,legend columns=-1},         ylabel={Delay (us)},         ymode=log,         symbolic x coords={1p Bare C,1p Partikle,2p Bare C,2p Partikle,2p Bare C \& Partikle,2p Bare C Sampling,2p Bare C Queuing},         x tick label style={rotate=20,anchor=east},         xtick=data,         nodes near coords,         every node near coord/.append style={rotate=90, anchor=west}]     \addplot coordinates {(1p Bare C,40)    (1p Partikle,29)     (2p Bare C,17)    (2p Partikle,22)    (2p Bare C \& Partikle,19)    (2p Bare C Sampling,193) (2p Bare C Queuing,448)};     \addplot coordinates {(1p Bare C,42.69)    (1p Partikle,33.19)     (2p Bare C,24.25)    (2p Partikle,26.06)    (2p Bare C \& Partikle,20.63)    (2p Bare C Sampling,360.63) (2p Bare C Queuing,670.94)};     \addplot coordinates {(1p Bare C,47)    (1p Partikle,36)     (2p Bare C,45)    (2p Partikle,42)    (2p Bare C \& Partikle,29)    (2p Bare C Sampling,476) (2p Bare C Queuing,1050)};     \addplot coordinates {(1p Bare C,1.44)    (1p Partikle,1.31)     (2p Bare C,6.13)    (2p Partikle,4.48)    (2p Bare C \& Partikle,1.23)    (2p Bare C Sampling,64.66) (2p Bare C Queuing,128.67)};     \legend{Min,Average,Max,Avg. Deviation}     \end{axis} \end{tikzpicture} \caption{All test case delays for 128 byte transfers.} \end{figure}

I created a horizontal bar plot to compare benchmark times. Since one of the tested components is really slow, I need a logarithmic y axis for the other values to be distinguishable. Combined with "nodes near coords" this results in the calculated values showing, instead of the original ones. Is there any way to fix this?  What it looks like:   What the values(!) should look like:   Clearly, I'm overlooking something terribly obvious. I'm just a beginner at PGFPlots, so please don't kill me. :)  MWE:  \documentclass[fontsize=12pt]{scrartcl}  \usepackage{pgfplots} \pgfplotsset{compat=1.8}  \begin{document}   \begin{tikzpicture}   \begin{axis}[      width=12.5cm,     xbar=0.1cm,     xmin=0,     y=0.6cm,     bar width=0.4cm,     xlabel={Time (ms)},     xmode=log,     major x tick style = transparent,     major y tick style = transparent,     symbolic y coords={       {SpreadsheetGear},       {Aspose.Cells},       {NPOI},       {C1.Excel},       {Spire.XLS},       {GemBox.Spreadsheet},       {SmartXLS},     },     ytick=data,     y dir = reverse,      nodes near coords,     nodes near coords align={horizontal},   ]    \addplot coordinates {       (3078.6,{Aspose.Cells})       (10059.2,{C1.Excel})       (28794.8,{GemBox.Spreadsheet})       (7437079.8,{SmartXLS})       (19975.2,{Spire.XLS})       (573.2,{SpreadsheetGear})       (10025.2,{NPOI})};   \end{axis}   \end{tikzpicture} \end{document}


I'm trying to create a very basic arrow, and I've cut it from a cube, only to find that this persists after deleting the cube. I am not entirely sure what to call it, hence searching for help has been pretty hard, but if anyone could answer, it would be much appreciated.

When I attempt to triangulate a mesh I end up with that dotted yellow bounding box when I mistakenly press Shift+t instead of Ctrl+t.  I cannot get rid of it by using Undo.    From what I can tell, it has something to do with Texture Space but I cannot find anything in the Object Data panel that will remove it once it's there.    So does anyone know how to get rid of this and set things back to how they were before I hit that wrong shortcut?


How to install CPAN modules on mageia 4? I am struggling to find out to achieve this.  any help is appreciated..

I get this error:  Can't locate Foo.pm in @INC  Is there an easier way to install it than downloading, untarring, making, etc?


I have a couple of NTP Stratum 2 servers, and these are in sync with a Stratum 1 GPS appliance, and also peered between them selves. I would be interested in creating a job, which will create an alert if the time difference between Stratum 1 and Stratum 2 goes off by X seconds etc. I appreciate any help on this..  Thanks

I have two NTP stratum 3 servers running and wanted to create a simple check that I could tell if either of the servers time drifted and alert that it's not synced properly with the public stratum 2 servers.  My first thought was to pull time from multiple stratum 2 servers and compare that time with what my ntp servers are sending. Then alert if the drift is over X delta.  Is there a more standard way or better method for verifying that an NTP server is sending the correct time?


I hope this is the right place to ask such question.  EDIT: And this question is not duplicate! I tried tracking down the host using services such as whois but they didn't provide an answer. So that route is not working  I have a client with a website but they don't remember their hosting provider. Upon searching based on the ip or the domain (using services such as whois) it still cannot be found.  I do have the credentials inlcuding the computer name, and upon searching based on the computer name I am directed to softLayer hosting provider. But they do not agree to provide any information. Could it be that the host actually uses softLayer service? (but again I don't know who the host is...)  The reason why I'm trying to find the hosting provider is that although I have the credentials, when trying to connect with WinSCP, I'm receving 'access denied'.  Is there something else I can do in order to find that hosting provider?  Thanks in advance

So me and my friend created and funded a website for a business venture. However due to some complications I no longer want to be part of the venture. My friend on the other hand will not remove my name from the website so I want to contact the host to force my friend to remove my name. The problem is my friend is the technical one and set things up so I have no idea who the host is, and every host finding tool has come up with nothing. I eventually used webhostinghero.com and they it said the domain is being hosted by 8 providers prntscr.com/nnb0he  I have two questions.   Is webhostinghero.com reliable? Is it possible to link multiple providers to one domain to mislead people? (I highly doubt my friend is willing to spend money on 8 hosting providers for one website so he must be using some service to protect the name of the host)


I created a chatbot that using Zapier (through Webhook and JSON) for sending to my Google Sheet a name and a phone of user and Apps Script must generate a coupon code automatically. I used function onEdit(e) and it works when I manually enter the text in Google Sheet but when I using the chatbot in not works. Why? What I must change in my script?  This is my script:   var COLUMNTOCHECK = 2; var DATETIMELOCATION = [0,1]; var COUPONHERE= [0,2]; var SHEETNAME = 'Main' var COUPON_CHARS_RANGE = "ABCDEFGHIJKLMNPQRSTUVWXYZ123456789"; function onEdit(e) {   var ss = SpreadsheetApp.getActiveSpreadsheet();   var sheet = ss.getActiveSheet();   if( sheet.getSheetName() == SHEETNAME ) {      var selectedCell = ss.getActiveCell();     if( selectedCell.getColumn() == COLUMNTOCHECK) {        var dateTimeCell = selectedCell.offset(DATETIMELOCATION[0],DATETIMELOCATION[1]);       dateTimeCell.setValue(new Date());       var couponLength = 8;       var coupon = "";       var CouponCell = selectedCell.offset(COUPONHERE[0],COUPONHERE[1]);       for (var i = 0; i

Unfortunately, as a new user I am not allowed to comment. This is why I need to do a new post regarding to this topic:   This is my code in Google Sheets Script:  function onEdit(e) {   if (e.range.getSheet().getSheetName() == 'Tabellenblatt1' && e.range.getColumn() == 1) {     e.range.offset(0,1).setValue(new Date());   } }   It works perfectly when I enter data in cell 1 manually, but when data is added via API (in this case when data is added via Zapier) it does not work. Anybody can give me a hint why?