Correcting incorrect altitudes of points recorded by my Android or how to calculate Geoid Height in QGIS
Inaccurate altitude GPS data with my Android?
Good evening! I'm studing something about finite fields and I didn't find anything that can answer my question.  I have a finite field $\mathbf{F}_q$ and the equation to solve is $x^n=a$. Which are the condition to resolve this equation? For which values of $q, n, a$ there exist a solution?  I will be very happy if anyone can answer this question, possibly with a reference of a book (or an article) that explai this with more details.  Thank in advance to everyone who can answer this one, I really need to understand this. Is it possible to save frequently used expressions in QGIS? Is there any way to save frequently used expressions in the selection or field calculator dialogs? Obviously I can cut and paste them into a file where I might save them, but I mean within the context of QGIS like you can do in ArcMap. Why is it better to use "#!/usr/bin/env NAME" instead of "#!/path/to/NAME" as my shebang? I notice that some scripts which I have acquired from others have the shebang #!/path/to/NAME while others (using the same tool, NAME) have the shebang #!/usr/bin/env NAME.  Both seem to work properly.  In tutorials (on Python, for example), there seems to be a suggestion that the latter shebang is better.  But, I don't quite understand why this is so.  I realize that, in order to use the latter shebang, NAME must be in the PATH whereas the first shebang does not have this restriction.  Also, it appears (to me) that the first would be the better shebang, since it specifies precisely where NAME is located.  So, in this case, if there are multiple versions of NAME (e.g., /usr/bin/NAME, /usr/local/bin/NAME), the first case specifies which to use.  My question is why is the first shebang preferred to the second one? Examples of bijective map from $\mathbb{R}^3\rightarrow \mathbb{R}$ Am I on the right track to proving this statement about composite function? How can I read a large text file line by line using Java? What order do triggered abilities happen in if multiple things trigger at the same time? I had several humans on the battlefield.  On turn three, I played . On turn four, I played . On turn five, during my upkeep, this question came up.  At this point, I need to draw/reveal three cards. If I reveal a human, Descendants' Path will allow me to cast it without paying its mana cost.  So, does it matter when I draw the human?  The static abilities state "at the beginning up your upkeep..." which leads me to believe that those two draws/reveals would happen before my normal draw. If that's the case, does the draw order happen in the same order that I played the enchantments?  In the end, that's how we decided to do it. I drew first for Triumph of Ferocity, then I revealed for Descendants' Path, then I drew for my turn. Did we do it right? I gave Google my phone number to verify it, not knowing that it would change it, and now my phone number is completely different? What have I done, and how do I unverify it and change my phone number back? How can you prove that the square root of two is irrational? When watching US television news or reading US news articles there is this affectation where instead of saying:     "Spotify music-streaming service to launch in U.S. on Thursday" ()   or      "Leading credit rating agency Moody's said on Wednesday that the U.S. government's impeccable credit..." ()   The on preposition is missed out.  Is this just a peculiar US journalistic "news speak" shortcut or do American non-journalist writers write this way too? What is aperture, and how does it affect my photographs? How does aperture affect my photographs?  Why should I care about the aperture with which a photo was taken? Environment variables are not passed to sub scripts while running on crontab I was trying to run one of the scripts (for example, wrapper.sh) which internally executes other scripts using crontab. It works fine without any issues.  When I have created a environment file (which stores the passwords-DB and paths) and trying to execute the main script (wrapper.sh) the cron entry doesn't work on those scripts which are called internally in the wrapper.  NOTE: I tried changing PATH, added env file location before the script in cron but it still didn't work:  9 9 * * * . /$SOMEPATH/some.env; /$SOMEPATH/wrapper.sh   The environment script and wrapper.sh are in same path. when the cron runs it passes the env variables to wrapper but not to the scripts which are called internally in wrapper. Also a mail is received on /var/mail/$user saying the env file as "No such file or Directory". I've gone through many posts but couldn't figure out the resolution. Is it possible to raise stats? I found a lot of dialogue choices requiring high Perception and I started the game with just 10 plus 1 for being an elf. With a magical helm and tower rest bonus I can temporarily boost it to 13, but is it possible to raise it permanently? Summation of natural number set with power of $m$ Who knows about the summation of this series: $$\sum\limits_{i=1}^{n}i^m $$  where $m$ is constant and $m\in \mathbb{N}$?  thanks Choosing variables to include in a multiple linear regression model I am currently working to build a model using a multiple linear regression. After fiddling around with my model, I am unsure how to best determine which variables to keep and which to remove.  My model started with 10 predictors for the DV. When using all 10 predictors, four were considered significant. If I remove only some of the obviously-incorrect predictors, some of my predictors that were not initially significant become significant. Which leads me to my question: How does one go about determining which predictors to include in their model? It seemed to me you should run the model once with all predictors, remove those that are not significant, and then rerun. But if removing only some of those predictors makes others significant, I am left wondering if I am taking the wrong approach to all this.  I believe that  thread is similar to my question, but I am unsure I am interpreting the discussion correctly. Perhaps this is more of an experimental design topic, but maybe someone has some experience they can share. .cache/upstart/Unity7.log growing to consume the entire free disk space. Python cypto suspected Can a creature with blindsight that is not immune to the Blinded condition suffer the effects of Blindness? How to recover deleted files? I am unit testing a .NET application (.exe) that uses an app.config file to load configuration properties.  The unit test application itself does not have an app.config file.    When I try to unit test a method that utilizes any of the configuration properties, they return null.  I'm assuming this is because the unit test application is not going to load in the target application's app.config.  Is there a way to override this or do I have to write a script to copy the contents of the target app.config to a local app.config?     post kind-of asks this question but the author is really looking at it from a different angle than I am.  EDIT: I should mention that I'm using VS08 Team System for my unit tests. Vehicles required/allowed in weigh stations on US interstates