Universe from nothing?
Are vacuum fluctuations really happening all the time?
This is a  about DNS server administration.   I have one hundred or so domains. All of these domains need to be configured identically, but it seems like a huge waste of time to have to configure a new zone and/or zonefile for every one of these domains. There has to be a better way to automate this!  I think I'm on to something...if I create a zone called ., or use some other feature in my DNS software to always return a specific IP when an A record is requested, this seems to get me pretty close to my desired end result. My server is responding authoritatively to the requests and it's so much easier to manage!  This was working great until nameserver validation software started checking these domains. I figured out that I can make most of the errors go away by adding NS records, but my software won't let me put more than one SOA record in the same zone file.  How do I work around this multiple SOA record problem? How to find the real user home directory using python? ModernCV Remove horizontal line in sections I want to write my cv with moderncv-Classic style. Can you tell me, how I can remove the horizontal line in the left of each section? Prevent external devices being locked to launcher If I connect an external device (such as a USB stick or android smartphone) it will automatically open in nautilus and get a corresponding icon locked to unity launcher. Is there any way to prevent this?  I'm using Ubuntu 14.04 Probability associated with experiencing all outcomes Banner ads should not be shown on the right-hand ad slot High Memory Usage on Linux Server I am taking my first dive into testing a mobile app.  It will be available to iOS and Android.  I've been searching for a way to test and automate iOS without having an actual iPhone or any other Mac device.  We run Windows here at the office.  I was looking to use iPhone emulators but it doesn't seem possible.  I saw Appium Studio/SeeTest but it seems even that requires iTunes and a real device.  I know you can set up a Mac vm on a Windows machine but are there any other ways to test iPhone without having to do this? Python HTTPS requests (urllib2) to some sites fail on Ubuntu 12.04 without proxy I have an little app I wrote in Python and it used to work... until yesterday, when it suddenly started giving me an error in a HTTPS connection. I don't remember if there was an update, but both Python 2.7.3rc2 and Python 3.2 are failing just the same.  I googled it and found out that this happens when people are behind a proxy, but I'm not (and nothing have changed in my network since the last time it worked). My syster's computer running windows and Python 2.7.2 has no problems (in the same network).  &gt;&gt;&gt; url = 'https://www.mediafire.com/api/user/get_session_token.php' &gt;&gt;&gt; response = urllib2.urlopen(url).read()   File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen     return _opener.open(url, data, timeout)   File "/usr/lib/python2.7/urllib2.py", line 400, in open     response = self._open(req, data)   File "/usr/lib/python2.7/urllib2.py", line 418, in _open     '_open', req)   File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain     result = func(*args)   File "/usr/lib/python2.7/urllib2.py", line 1215, in https_open     return self.do_open(httplib.HTTPSConnection, req)   File "/usr/lib/python2.7/urllib2.py", line 1177, in do_open     raise URLError(err) urllib2.URLError: &lt;urlopen error [Errno 8] _ssl.c:504: EOF occurred in violation of protocol&gt;   What's wrong? Any help is appreciated.  PS.: Older python versions don't work either, not in my system and not in a live session from USB, but DO work in a Ubuntu 11.10 live session. Is there a particular reason why vote times are omitted in the data dump?  IMO this could be a very useful data-set. Is this one of the steps that was done to anonymize the data, or does it simply not exist? This would be a very good addition to future dumps to help build time-based relationships, which are currently very rigid and full of assumptions. How to use oEmbeds on Post Content during AJAX requests I have an AJAX request that returns a post. The post_content has links to Twitter, YouTube, TED and other platforms that are registered as oEmbed providers in a default, vanilla WordPress install. By now, the WordPress oEmbed handler does not register them and displays plain links and nothing else.   How can I fetch content via AJAX with oEmbed support? Find the solution of following differential equation:     $$\frac{dy}{dx}=\frac{1}{xy(x^2 \sin (y^2)+1)}$$   Could someone hint me something to get through this problem? How can I detect if my apple device supports Bluetooth Low Energy The close dialog says there are two off-topic votes, but none of the off-topic reasons have votes next to them I've found strange behavior when closing this  - I definitely see that there are 3 closing votes and 2 of them are at "Off-topic" section:   -but there are no explanations on section itself:   -while, normally, it's expected that it will appear. In custom comments section there are also no closing-votes displayed.   Perhaps it's just my browser (which is FF 26 x64 under Win) - so marking this as a "possible bug". Thank you for your attention. Two Bibliographies: one for main text and one for appendix I have a manuscript in which has the following structure:  Main Text Bibliography Appendix   However, there are citations which are only cited in the appendix, and they show up in the main bibliography. I would like to split my Bibliography into two different sections, so that the structure of the paper would look like this:  Main Text Bibliography for Main Text Appendix Bibliography for Appendix   I'm currently using bibtex and a single .bib file, and creating the bibliography with  \bibliographystyle {someBibStyleFile} \bibliography {bibFileName}   I'm interested in a method to split my single bibliography into main bibliography and appendix bibliography with minimal changes to the rest of the document.  I'm aware that biblatex is more powerful than bibtex, but I'm not prepared to make the switch before the deadline of this project. There are many related bibliography-with-multiple-sections type of questions, but I didn't see one that covers this case. How to detect end of line with sed I'm looking for a way to only execute replacement when the last character is a newline, using sed.  For instance:  lettersAtEndOfLine   is replaced, but this is not:  lettersWithCharacterAfter&amp;   Since sed does not work well with newlines, it is not as simple as  $ sed -E "s/[a-zA-Z]*\n/replace/" file.txt   How can this be accomplished? Wave equation: $y=A \sin(\omega t-kx)$ or $y=A\sin(kx-\omega t)$? What is correct wave equation: $y=A \sin(\omega t-kx)$ or $y=A\sin(kx-\omega t)$?  How are these wave equations used in the positive $x$-direction and negative $x$-direction? My internet connection is very slow. I suspect someone in the network is using a BitTorrent client which takes huge amount of bandwidth.  Is there a way to detect who is using my bandwidth (network sniffing tools etc)?  I should have pointed out that I have no access to the router, what I am looking for is a way of detecting someone's MAC/IP if she uses Bittorrent. Why use a certain measure of forecast error (e.g. MAD) as opposed to another (e.g. MSE)? MAD = Mean Absolute Deviation MSE = Mean Squared Error  I've seen suggestions from various places that MSE is used despite some undesirable qualities (e.g. , which states on p8 "It is commonly believed that MAD is a better criterion than MSE. However, mathematically MSE is more convenient than MAD.")  Is there more to it than that? Is there a paper that thoroughly analyzes the situations in which various methods of measuring forecast error are more/less appropriate? My google searches haven't revealed anything.   A similar question to this was asked at , and the user was asked to post on stats.stackexchange.com, but I don't think they ever did. pass 1 environment variable using sudo