How can I add explanation like that in figure in LateX under my equation?
Equation's symbols or parameters description are shown below, however, the = and the details of parameter are not aligned.     I want to make a parameters list for a equation like this, in which symbols, = and detail information are aligned in terms of vertical position.  where    ...    P   =   notional permeability factor    N   =   number of waves    Sd  =   damage level    ...   A tabular environment will produce more spacing before and after text. So how to make the = vertical aligned?   The codes is provided:  \begin{equation} \frac{H_s}{\Delta D_{n50} } = 1.0~ P^{0.13}~ \left(\frac{S_d}{N} \right)^{0.2} \xi_m^P~ \sqrt{\cot \alpha} \end{equation} where:   $H_s$ = significant wave height, equal to the average of the highest 1/3 of the waves  $\Delta$  = relative buoyant density, equal to $\rho_r / \rho_w - 1$, where     $\rho_w$ is the water density  $D_{n50}$ = nominal  diameter defined in Equation (2)  $P$ = notional permeability factor  $S_d$ = damage level   $N$ = number of waves  $\xi_m$ = breaker parameter based on mean wave period $T_m$  $\alpha$ = slope angle
Beryllium Vacuum Sphere Boat/Aircraft Before running a ridge regression model, do I need to preform variable selection? I am currently constructing a model that uses last year's departmental information to predict employee churn for the current year.  I have 55 features and 318 departments in my data set.  A good portion of my independent variables are correlated, and because of this, I believe that performing a ridge regression on my data will lead to optimal predictions when I bring the model into production.  I have studied ridge regression and understand that the lambda coefficient computed for a given predictor can minimize the effect that predictor has on the model to next to nothing.  Does this mean that performing a ridge regression means I don't have to bother with variable selection? If I do need to perform a variable selection technique, would implementing a stepwise regression and then using those selected variables in my ridge regression be a valid approach at variable selection? I already posted this question on stack exchange but was informed that stack exchange was the better platform to ask statistical questions.  I am sorry for the confusion. Need Google Geocoding to return City name in English Should 'fuck' be present in review audits (intentionally fake suggested edit reviews)? Some suggested edit reviews are fake and are intended to check that the reviewer is paying attention and reviewing correctly.  I recently encountered one where the fake suggested edit contained 'fuck':   Despite the fact that we regularly encounter profanity online these days, and whilst it is not uncommon to encounter the word 'fuck' in blog posts by recognised authorities in the world of software development (and, I assume, in other fields), this nevertheless caught me a bit by surprise.  I have no problem with whatever strength of language someone feels is appropriate and relevant to make their point, however in the context of audit-related fake suggested edits, is the use of profanity appropriate?  Update: just to clarify, the word 'fuck' was not present prior to the fake suggested edit. The fake suggested edit added the word 'fuck' where it was not previously present. Is there a way to open a raster that is stored in ESRI V10.0 Geodatabase in QGIS V2.4?    I can open the vector layer, but there does not seems to be a way to open a raster. Optimizer not choosing index union plan Why is the following query slow?  select count(*)   from [dbo].[mt_dispatch_link]     , [dbo].[_mt_dispatch] [_mt_dispatch]  where   (mt_dispatch_link.contract_id_1 = _mt_dispatch.contract_id       and mt_dispatch_link.dispatch_id_1 = _mt_dispatch.dispatch_id)     or   (mt_dispatch_link.contract_id_2 = _mt_dispatch.contract_id       and mt_dispatch_link.dispatch_id_2 = _mt_dispatch.dispatch_id)     It takes over 10 minutes, and then I tend to stop it at that point. My question is more about how to make sense of the query plan.  Looking at the query plan I can see that the bottom clustered index scan is returning about 250000 records, but the cost is 0% and it is being put into a temporary table.  The top index scan is about 25000 records.  But the cost of 95% comes from the nested join. What conclusions should I draw from this?  The above query plan shows two index scans, does that mean it is doing 25000 + 250000 index scans, or does it mean that it is doing 25000 * 250000 index scans?  If I change the query to this (adding FORCESEEK):  select count(*)   from [dbo].[mt_dispatch_link]     , [dbo].[_mt_dispatch] [_mt_dispatch]       WITH (FORCESEEK)  where   (mt_dispatch_link.contract_id_1 = _mt_dispatch.contract_id       and mt_dispatch_link.dispatch_id_1 = _mt_dispatch.dispatch_id)     or   (mt_dispatch_link.contract_id_2 = _mt_dispatch.contract_id       and mt_dispatch_link.dispatch_id_2 = _mt_dispatch.dispatch_id)   I end up with a much better plan and the query runs instantly:    I ran update statistics on both tables. Didn't fix it unfortunately. The table design is not very good, so I think SQL Server doesn't really understand and is thus coming up with a poor query plan. Some more info about the table design at .  Why is the query optimiser not coming up with the optimum plan? Allow linking to specific revision of revision history showing diff Currently, the only way to link to a revision (clicking "link"), you just get  which shows what the post looked like at that revision:        Personally, I rarely use this and haven't ever found myself in a scenario (as far as I remember) where I would prefer the way it currently works to what I'm suggesting here.  Could we:   Add another link, or Change the current link   Such that it:   Displays the diff on a separate page (I'd prefer this, since the highlight and scroll thing doesn't always work properly - although perhaps it has something to do with loading images, so it might not apply here, or, if it doesn't, we could fix that instead), or          Highlights and scrolls to a diff, like what is done when you link to an answer () Is it possible to skip releases during an upgrade? Possible Duplicate:          Is it possible to upgrade a 10.04 lucid installation to 11.04 Natty, without upgrading to 10.10 first? What about other versions? Langage to declare a circuit board This problem occurred to me when I came across a similar problem where the radii were taken over only the primes. That question was unanswered, but it seems to me infinitely many circles of radius $1/2, 1/3, 1/4...$ can fit into a unit disk. The area of all those circles would be $\pi \sum_2^\infty 1/n^2 = \pi^3/6 -\pi$, which is less than the area of the unit disk $\pi$. But can the circles actually be packed with no overlaps? 19MB/s Net Speed but Only 2MB/s Usable Hi so i just got internet a about a month ago and my net speed is 19MB/s, I have tested it on loads of sites they all say the same thing(19MB/s), but it wont use more than around 2MB/s i have tried downloading different ways, and with more than 1 download at a time and I still get capped at about 2MB/s. It affects everything like loading websites and playing games as well. So if I'm downloading (max 2MB/s) and I load up a web page, every thing slows down, the download speed slows and web sites take for ever to load up, what can it be that makes it thus, and speed test say's 19MB/s how to get the original entity on hook_entity_presave? i actually need it for the content_moderation_state entity   function hook_entity_presave(Drupal\Core\Entity\EntityInterface $entity) { if ($entity-&gt;getEntityTypeId() !== 'content_moderation_state' ) {     return; }     $moderation_state = $entity-&gt;get('moderation_state')-&gt;getString();   //code to get the original entity moderation state bash - problems reading text file and printing line by line What does f-stop mean? What does f-stop mean? Is it the same thing when people say "2 stops" for example? I know how to monitor the network interfaces on my local computer with Wireshark. But, how do I monitor the traffic flowing through my wireless access point from connected computers?  It seems like this might not be possible without some kind of special software on the wireless access point itself. 14 months ago, an  supplement was published that discussed how the ranger described in the Player's Handbook was under powered. These rules reimagined the ranger's abilities, and suggested that an official version would be released later.     Finally, we come to implementation. If this iteration of the ranger, or a future revision of it, grades high enough, our plan is to present it as a revised ranger in a future D&amp;D sourcebook.   Does that Sourcebook exist yet? If not, have the devs given an update or told us their intentions? How to programmatically send SMS on the iPhone? Does anybody know if it's possible, and how, to programmatically send a SMS from the iPhone, with the official SDK / Cocoa Touch? How do I get the source code for eglibc in a format that will allow stepping through the source with gdb?    I have tried using apt-get source libc6-dev and that works for getting the source code, but I think that since the pre-processor directives were not applied that the line numbers that gdb has does not match with the source I downloaded. This makes it less useful when trying to step through the source and look at how functions in libc are working. When I use the MouseUp event, I can get it to fire with a mouse right-click. But MouseLeftButtonUp won't fire with either click!  &lt;Button MouseLeftButtonUp="btnNewConfig_MouseUp"  Name="btnNewConfig"&gt;     &lt;StackPanel Orientation="Horizontal"&gt;         &lt;Image Source="Icons\new.ico" Height="24" Width="24" Margin="5"/&gt;         &lt;TextBlock VerticalAlignment="Center"&gt;New&lt;/TextBlock&gt;     &lt;/StackPanel&gt; &lt;/Button&gt;   I know this is most likely something simple. Thanks for the help! Introductory biology text for an outsider I'm a maths major and I have an interest in learning biology. I know very, very little; I know how babies are made and that's about it. Could anyone recommend a stimulating text to read for its own sake and also to use to learn biology?