Configuring rDNS and PTR Record
Where did dedicated.abac.net. come from in my rDNS and PTR records?
How to create a database directory structure for MySQL? What are the best methods to show a data table in mobile / tablet view? How do I set the default program? How do I set the default program that I use?  I have tried to open System Info → Default Program → change my program, but it won't work,  Any idea? Or should I use Terminal?   I want to replace the default movie player with VLC media player, because the current movie player is useless to me. How to reduce title bar height? Calling acro first use when plural is producing an 's' in the short definition that is wrong I have an acro first use that must be plural, but I am getting an erroneous "s" when I shouldn't be. I'm getting (sIMFs) when it should be (IMFs). See picture and code below. The problem only occurs on the first call and it does so for all my acronyms. Thanks in advance.   \documentclass[12pt,twoside]{report} \usepackage{acro} \DeclareAcronym{IMF}{     short = IMF,     long  = Intrinsic Mode Function,     class = abbrev}  \begin{document} \acp{IMF} \acresetall \ac{IMF} \acp{IMF} \acfp{IMF} \end{document} Exporting animation created with animate package Consider the following minimal working example.   It's great to have an animation in pdf format.   But sometimes it would be good to be able to export it into an animated gif or something else (swf, video file, svg?).  How do I achieve this?   Note: I often have animations together with pgfplots.     \documentclass{article}  \usepackage{animate}  \usepackage[active,tightpage]{preview} \PreviewEnvironment{animateinline}  \begin{document}  \begin{center} \fboxsep1mm     \begin{animateinline}[autoplay,loop]{2}     a     \newframe         b     \newframe       c                      \end{animateinline} \end{center}  \end{document}   Remark   The animation is not visible in all PDF viewers. It surely works with a current Adobe Reader. How would gravity change on a planet rotating around itself very fast? Let's take a planet identical to Earth, but with rotation speed multiplied by ten thousand. What would happen with the gravity if it was spinning madly around itself? Would the centrifugal force make objects seem lighter than on normal Earth? Would the people on that planet be able to jump higher? Add additional sub-groups to the new Badge page & related Feedback On the  (A+), there are sub-groups under the major groups.  For example, the Participation Badges group has related badges Commentator and Pundit sub-grouped, and Quorum and Convention sub-grouped.  I am of the opinion at least 1 of the following additional sub-groupings should be made:  Question Group   Student &amp; Scholar Investor &amp; Altruist Promoter &amp; Benefactor   Alternately, one sub-group of Investor, Altruist, Promoter &amp; Benefactor    Answer Group   Teacher, Enlightened, Guru Consider moving Generalist to Tag Badges Group or the bottom of the Answer Group if Tag Badges is moved immediately below Answer Group.   Participation Group   Talkative &amp; Outspoken Caucus &amp; Constituent Precognitive &amp; Beta   Tag Badges  Move this group to either the bottom of all groups or below the Answer Group. Its current placement here creates a weird artificial barrier, especially with users who have no Tag Badges.  Moderation Group   Informed &amp; Analytical Taxonomist &amp; Synonymizer Critic &amp; Supporter Disciplined &amp; Peer Pressure Suffrage, Vox Populi &amp; Civic Duty   Alternately, one sub-group of Critic, Supporter, Suffrage, Vox Populi &amp; Civic Duty  add Cleanup and Organizer to the Editor sub-group add Citizen Patrol to the Deputy sub-group   NOTE: Since this is now status-completed, but only a select portion was completed, the rest of the request has been broken into 2 additional questions: Why is the Yang-Mills gauge group assumed compact and semi-simple? What is the motivation for including the compactness and semi-simplicity assumptions on the groups that one gauges to obtain Yang-Mills theories?  I'd think that these hypotheses lead to physically "nice" theories in some way, but I've never, even from a computational perspective. really given these assumptions much thought. After upgrading to 13.10, I am now getting a prompt for my gmail password every time I log in. There is no indication as to which service or application needs this information. If I enter the correct password I'm told it is incorrect. My gmail account does not use two factor authentication. The problem has only started after an upgrade from 13.04 to 13.10.  How can I prevent this prompt appearing, and/or what is doing the prompting? Is there any decent speech recognition software for Linux? The short version of the question: I am looking for a speech recognition software that runs on Linux and has decent accuracy and usability. Any license and price is fine. It should not be restricted to voice commands, as I want to be able to dictate text.  More details: I have unsatisfyingly tried the following:       (e.g., )  (used to run  on Linux but was discontinued years ago)      (built on the Kaldi speech recognition toolkit)    +  +  +   : only accepts voice commands  All the above-mentioned native Linux solutions have both poor accuracy and usability (or some don't allow free-text dictation but only voice commands). By poor accuracy, I mean an accuracy significantly below the one the speech recognition software I mentioned below for other platforms have. As for Wine + Dragon NaturallySpeaking, in my experience it keeps crashing, and I don't seem to be the only one to have such issues unfortunately. On Microsoft Windows I use Dragon NaturallySpeaking, on Apple Mac OS X I use Apple Dictation and DragonDictate, on Android I use Google speech recognition, and on iOS I use the built-in Apple speech recognition. Baidu Research released  the  for its speech recognition library using  implemented with Torch. Benchmarks from  are encouraging as shown in the table below, but I am not aware of any good wrapper around to make it usable without quite some coding (and a large training data set):      System Clean (94) Noisy (82) Combined (176)     Apple Dictation 14.24 43.76 26.73   Bing Speech 11.73 36.12 22.05   Google API 6.64 30.47 16.72   wit.ai 7.94 35.06 19.41   Deep Speech 6.56 19.06 11.85     Table 4: Results (%WER) for 3 systems evaluated on the original audio. All systems are scored only on the utterances with predictions given by all systems. The number in the parentheses next to each dataset, e.g. Clean (94), is the number of utterances scored.  There exist some very alpha open-source projects:   (part of Mozilla's Vaani project:   ())  Vox, a system to control a Linux system using Dragon NaturallySpeaking:  +     (to be released by Google, mentioned at Interspeech 2018)  I am also aware of this  as well as this .  I am aware of  , which allows speech recognition via Dragonfly on one computer to send events to another, but it has some latency cost:  I am also aware of these two talks exploring Linux option for speech recognition:   (David Williams-King)  (Tavis Rudd) What is the purpose of LongLength for .Net Arrays? Determining true mean from noisy observations I have a large set of data points of the form (mean, stdev). I wish to reduce this to a single (better) mean, and a (hopefully) smaller standard deviation.  Clearly I could simply compute $\frac{\sum data_{mean}}{N}$, however this does not take in to account the fact that some of the data points are significantly more accurate than others.  To put it simply, I wish to preform a weighted average of these data points, but do not know what the weighting function should be in terms of the standard deviation. Evaluating limit (iterated sine function) The limit is   $$\lim_{x\rightarrow0} \frac{x-\sin_n(x)}{x^3},$$  where $\sin_n(x)$ is the $\sin(x)$ function composed with itself $n$ times:  $$\sin_n(x) = \sin(\sin(\dots \sin(x)))$$  For $n=1$ the limit is $\frac{1}{6}$, $n=2$, the limit is $\frac{1}{3}$ and so on.  Can we define a recurrent relation upon that given hypothesis? Also, how do I involve $n$ into calculation, because the final limit will depend on it?  Any suggestions on how to tackle this?  Thank you! Solving $x - a \log(x)=b$ Let $a&gt;0$ and $b \in \mathbb{R}$: Assume there exists an $x &gt;0 $ s.t. $$x - a\log(x) = b$$ holds. How can it be determined in closed-form? How (and why) use stderr for both reading and writing? According to , less reads navigation commands from stderr if it's not able to open /dev/tty.  This seems puzzling, since I've never seen anything write to another program's stderr stream, and I don't know how I would even accomplish that.  What is the purpose of stderr being open for both reading and writing? And if this is useful, how do I make use of it on modern systems? (Is there some arcane syntax to pipe something into stderr instead of stdin, for instance?) How to select the rows with maximum values in each group with dplyr? How can I get my external IP address in a shell script? I need to find my external IP address from a shell script. At the moment I use this function:   myip () {      lwp-request -o text checkip.dyndns.org | awk '{ print $NF }' }   But it depends on perl-libwww, perl-html-format, perl-html-tree installed. What other ways can I get my external IP? How do I insert a line at the top of a text file using the command line? You'd think that as soon as Harry met someone who was friends with his dad, he'd have asked about his family.  Certainly Lupin or Sirius could have told him something of his family, given that they were James' closest friends, and Sirius was "always welcome at the Potters".  Obviously there's nothing in the books, but did J.K. Rowling ever explain why there was no mention of any living relative other than Aunt Petunia, or even what happened to Harry's grandparents?