When entering the US, there is a question (11d) on Customs Declaration about bringing soil with me. Does a beach sand count as a soil? Can I still bring it? Do I have to declare it?  This is a different question from this one because I don't need to have it in a carry-on and I want to bring it from outside the US. The other question is about bringing a sand with you on board the plane within the US and addressing concerns regarding TSA. My question is about importing the sand to the US
I'm making a trip back home (to the coast) shortly, and I would like to bring back sand from the beach with me as a keepsake or memento. It's just a short weekend trip, and I won't be checking any luggage, so I was wondering if it's even worth bothering trying to bring sand aboard the plane in my carry-on?  If so, what can I do to make the security screening as smooth as possible? I was planning on putting the sand in sandwich-sized plastic bags, enclosed in a larger quart- or gallon-sized bag.
If a motherboard doesn't explicitly support a RAM frequency, is still compatible? For example, my  says this:   Supports DDR3 2133(OC)/1866(OC)/1600/1333/1066 non-ECC, un-buffered memory   Is RAM clocked at 2400 MHz compatible? Will the performance be downgraded or it just won't work?  I found other questions but they were related to the CPU cap at 1600 MHz. This cap is related to the motherboard, specs says 2133(OC) max. I'd like to install both Ubuntu 12.04 and Windows XP on a Dell laptop, and I was thinking about using a dual boot structure, and using the bulk of my hard drive as empty hard drive space to share files between the two operating systems (so choice of file system type is very important in this set-up).     The kind of partitioning structure I would like to use is  Partition 1 - Ubuntu 12.04 (root) (20GB)  Partition 2 - Ubuntu /home        (20GB)  Partition 3 : Free Space          (560GB)  Partition 4 : Windows XP          (35GB)  Partition 5 : SWAP                (3GB)  (Total Hardrive Capacity is ~640GB)    My question is; what is the best way to go about setting up this kind this system?   Should I install Windows XP first and setup the partitions, and then install Ubuntu which I believe will install the GRUB bootloader for OS booting choice   or   Do I install Ubuntu first, setting up the available partitions and then perform a WIndows install?  Please let me know if there is anything in this setup that I have left out and should know about, including things related to setting particular partitions as logical or primary, and whether the boot partition and the filesystem partition should actually be two separate partitions. How to repair a corrupted Excel file I'm trying to restore some files for a friend who messed up a USB stick by pulling it out of the computer too soon. By searching invisible partitions I was able to restore the files. All files are intact, except 1 excel file that seems to be corrupted.  I've googled about ways to repair an Excel file, because the default repair options in Excel 2003-2010 do not work for this file. I've came across a numerous  third-party apps, of which the  one seemes to be able to do the job: Recovery Toolbox for Excel.  Of-course, this and all other apps I found require a purchase to actually repair the file. It seems a bit silly to pay 30 dollars for a one time thing, and something that is not for myself. So, I would like to keep that as a last-resort option.  Is there anything I can try to fix this? I've attached a screenshot of how the file looks when I open it on my OSX when converted to a HTML file (to view the code), for  the option that it could be a character set problem. \nameref breaks for the star versions of section, paragraph when titlesec is loaded. I have a document that numbers paragraphs by default, but I have a few I do not want to number but would like to refer to. These are marked with \paragraph*, however, if the titlesec package is loaded at the same time, it causes nameref to display an empty string (the link box of hyperref is still visible).  MWE:  \documentclass[12pt]{article} \usepackage[sf]{titlesec} %comment this out and it works fine. \usepackage{hyperref} \begin{document} \section{Sections} \label{sec} This is \nameref{sec} \paragraph{A named Paragraph} \label{par} This is \nameref{par} \paragraph*{A starred named Paragraph} \label{par:star} This is \nameref{par:star} \end{document}   I suspect titlesec causes this defect for ALL star variants of sectioning commands but have not tested this. For me only paragraph* is relevant however a fix for all variants would be the best.  I have a hunch it might be related to this:  however this happens to go way beyond my latex knowledge and is just "magic" for me. Should I use the singular or plural verb in mathematical formulae ("Two and two make/makes four")? Wear a hat multiple times? How can I change (or remove / reset ) my name on a site in Stack Exchange network? Ok guys, continuing my passage through edwards... here is the question... thanks for hints/solutions in advance:  Suppose $f(x,y,z)=0$ can be solved for each of the three variables $x,y,z$ as a differentiable function of the other two. Then prove that  $\displaystyle \frac{\partial x}{\partial y} \frac{\partial y}{\partial z} \frac{\partial z}{\partial x} = -1$  Verify this is the case for the ideal gas equation $pv =RT$ where (where $p,v,T$ are the three variables and $R$ is the constant). Why can't a domain's root be a CNAME? I've just read  which essentially says that when I set up DNS for example.com, the root record can't be a CNAME, it has to be an A record.  My question is, why?   I'm sure the clever people who designed DNS didn't make arbitary restrictions for no reason, but I don't see what we gain by requring root domains to be A records. I would love to just point my example.com domain to someserver.somewebhost.example and forget about it, but I can't.  Please enlighten me, billpg. If you have such a good way to do formatting in questions/answers why isn't it used for the "about me" section on the profile page?  It looks easy to make and adds just a little bit more consistency. How do I figure out the right size font / text for a given read distance? To avoid printing single letters at varying sizes and measuring how far away I can see it from a distance is there a formula for determining what size font for a particular read distance? Is it better to take the midpoint between the ascender line and x-height or to go purely off of the x-height (since going purely off the ascender line could leave lowercase letters difficult to read)? How does vertical height play into this? Would I need to then figure the hypotenuse distance instead of a straight distance?  For example if I'm shooting for a 20' read distance but the sign is to be placed about 30' up should I use a distance of  35' instead of 20'?  I'm shooting for a 20' read distance for the headline and then possibly a 10' read distance for additional content depending on how it all fits on the active area. XML DML for 2008 R2..How to modify nested Elements Is 512 bits a more secure hashing than 256 bits? What is the best way to close an ASPX page from the code-behind?    I have a button event handler that I want to close the page after the user has clicked an ASP.NET button on the page.  I have tried to programmatically add a JavaScript method that contains a window.close() command to the OnClientClick event to close the page but it does not work.  The button is also a asp:AsyncPostBoskTrigger for an AJAX Update Panel.  The application uses .NET Framework 3.5. Why are eigenfunctions which correspond to discrete/continuous eigenvalue spectra guaranteed to be normalizable/non-normalizable? These facts are taken for granted in a QM text I read. The purportedly guaranteed non-normalizability of eigenfunctions which correspond to a continuous eigenvalue spectrum is only partly justified by the author, who merely states that the non-normalizability is linked to the fact that such eigenfunctions do not tend to zero at infinity.  Not a very satisfying answer. What I'm really after is an explanation based in functional analysis. I believe there is a generalized result about inner products being finite for discrete spectra but infinite for continuous spectra.  Can anyone shed some light on this? What do you call exaggerations like "I'm starving"? For example, when you are a little hungry and you say "I'm starving", or when you are so tired and you say "I'm dying". What do you call these type of expressions? Just exaggerations? I don't know how to explain this better. This is what I'm trying to do:  I have a website A where I make configuration changes and add other stuff. Now I create a website B. I would like to add the configuration changes from website A to this website.   I know the UUID of both websites have to be the same (like staging &amp; production environment). In "" they explain how to do this with drush cget system.site.   The problem is when I run drush cget system.site in my website A I get the following drush error:     Command config-get needs a higher bootstrap level to run - you will need to invoke drush from a more functional Drupal environment to run this command.                                                               [error]   The drush command 'cget system.site' could not be executed.                                                                                                                                                           [error]   Drush was not able to start (bootstrap) the Drupal database.                                                                                                                                                          [error]   Hint: This may occur when Drush is trying to:    * bootstrap a site that has not been installed or does not have a configured database. In this case you can select another site with a working database setup by specifying the URI to use with the --uri parameter   on the command line. See drush topic docs-aliases for details.    * connect the database through a socket. The socket file may be wrong or the php-cli may have no access to it in a jailed shell. See  for details.   Drush was attempting to connect to:  Drupal version         :  8.0.0-rc1  Site URI               :  http://default  Database driver        :  mysql  Database hostname      :  localhost  Database port          :  3306  Database username      :  root  Database name          :  s_1  PHP executable         :  /Applications/MAMP/bin/php/php5.5.10/bin//php  PHP configuration      :  /Applications/MAMP/bin/php/php5.5.10/conf/php.ini  PHP OS                 :  Darwin  Drush script           :  /Users/myname/.composer/vendor/drush/drush/drush.php  Drush version          :  8.0-dev  Drush temp directory   :  /tmp  Drush configuration    :  Drush alias files      :  Drupal root            :  /Applications/MAMP/htdocs/s1  Site path              :  sites/default  Sync config path       :  sites/default/files/config_bZM1aJhLcWGpFZJEzfEw_pKF4g71jOdkSRti30k540BAwE9GQ4U6p469a9VxyJS4j4JVfC58qg/sync   I've installed the latest version of drush .. . I'm working with the release candidate of Drupal 8. Is there another way to get my UUID? Or do you have a tutorial or a video/blogpost of somebody who already did this?  UPDATE:  Ok, I was able to retrieve the UUID from website A and changed the UUID in website B so they have the equal UUID.  After that I changed the system site slogan of website A.  Then I did an export of the configuration in website A. But when I tried to import it in website B I got 137 new files to sync .. . The UUID is different in all files like this:    When I tried to synchronize I got the following error: Are there any best practices for choosing the title of web pages? There are a lot of resources online oriented toward SEO, but not toward users.  My impression is that most sites have something similar to Product - Page. But there are cases when switching this around is more useful. For example, if mail clients displayed the title like this:  Inbox (3) - Gmail  Instead of:  Gmail - Inbox (3)  You would be able to see the message count, even if the title was cut off. (I'm pretty sure Gmail used to do this).  I assume the title is mostly ignored by users except when:   using boorkmarks finding the right tab in the browser   What are the considerations for users when choosing a web page title? Are there different considerations for the home page, pages behind a login, etc? One-byte-off pointer still valid in C? Why don't C++ compilers define operator== and operator!=? I am a big fan of letting the compiler do as much work for you as possible.  When writing a simple class the compiler can give you the following for 'free':   A default (empty) constructor A copy constructor A destructor An assignment operator (operator=)   But it cannot seem to give you any comparison operators - such as operator== or operator!=.  For example:  class foo { public:     std::string str_;     int n_; };  foo f1;        // Works foo f2(f1);    // Works foo f3; f3 = f2;       // Works  if (f3 == f2)  // Fails { }  if (f3 != f2)  // Fails { }   Is there a good reason for this?  Why would performing a member-by-member comparison be a problem?  Obviously if the class allocates memory then you'd want to be careful, but for a simple class surely the compiler could do this for you?