In Starwars during the battle of Hoth, the empire made what i believe to be a hilarious strategic miscalculation and sent vehicles with only forward facing firepower (unimpressive firepower at that), are easy targets, and are slow moving, up against the stronger, more agile squadrons of rebel fighters which consequently result in massive imperial AT-AT casualties.   The rebels had previously illustrated a proficiency at fighter based combat and rely upon them heavily. Fighters appear to be the perfect counter to an AT-AT assault.   So why would any general in his sane mind deploy them? granted, i recognise that their firepower was sufficient to breach the rebel defences, would likely impose a significant psychological effect on the enemy, would act as overwatch due to heigh and acted as troop carriers. However they were completely vulnerable to the obvious rebel fighter counter and appear to be totally impractical anyway: They are slow moving, easy targets and possess obvious weak spots around the cockpit and leg joints.   What ever happened to tanks, which would be the far more logical alternative, especially when supported with ground to air/air-air defences, and why would the empire use AT-ATs?
are used by the Empire in a manner that is tactically identical to how a modern day army would use a tank, in that they are used as shock armour with powerful main guns which will punch through entrenched positions. (No combined arms tactics were used in the Battle of Hoth, but that's a different question altogether)  However, AT-AT walkers have a number of (rather lethal) drawbacks and no advantages that I can see compared to tanks.    They have footpads in place of treads, which greatly increase their ground pressure, and which will cause them to easily sink as compared to treads They have a high center of gravity and can be easily tripped, which was exploited in the Battle of Hoth. (granted that this was canonically presented as an oversight, albeit a rather stupid one, since most martial arts strongly emphasise lowering your CG.) They are slower than a modern main battle tank despite their long legs, which one would normally expect to grant additional mobility (max speed 60km/h on flat terrain, compared to 72km/h on flat terrain for the ). This is exacerbated by the fact that AT-AT walkers are using fusion power cells as compared to diesel engines.   It would seem that it would make far more sense for the Empire to remove the legs and mount the main chassis on treads, which would make the vehicle far more effective. Why then, did they not do this? It clearly was not the case that imperial Engineers lacked imagination, as they did produce .   Possible answers which I find implausible as advantages:  1: AT-AT walkers are tall, and therefore have a surveying advantage over the battlefield / have a better vantage point to fire from  Orbital satellites can provide the observation, and in any case air/orbital support should always be called in, especially if fire support from above is required.
Is there a way to change the restrictions passcode on an iPhone without restoring the phone? I haven't forgotten the passocde; I just want to change it. When I'm connected to two networks with separate routers using Wifi and Ethernet, how does my Mac know what connection to use when I visit a website? How can I shutdown my Android phone using an adb command? How do I halt an android phone using adb command? I can reboot, but I don't know how to halt.  I tried shutdown -k wait command, but it did not work. Input field for decimal property Using beamer \visible command inside a table, without adding vertical space When using the beamer \visible command inside a tabular environment, beamer adds an extra vertical space before the text. For example, in the following code, beamer adds an empty line before the word World in the second row. Can this be avoided?  \documentclass{beamer} \begin{document} \begin{frame}   \begin{tabular}{|p{1cm}|p{1cm}|}     \hline     1 &amp; Hello World \\     \hline     2 &amp; \visible&lt;2-&gt;{Hello World} \\     \hline   \end{tabular} \end{frame} \end{document} Trigger a button click with JavaScript on the Enter key in a text box I have one text input and one button (see below). How can I use JavaScript to trigger the button's click event when the Enter key is pressed inside the text box?  There is already a different submit button on my current page, so I can't simply make the button a submit button. And, I only want the Enter key to click this specific button if it is pressed from within this one text box, nothing else.  &lt;input type="text" id="txtSearch" /&gt; &lt;input type="button" id="btnSearch" value="Search" onclick="doSomething();" /&gt; Symmetric Matrix , Eigenvectors are not orthogonal to the same eigenvalue. I know that the symmetric matrix has orthogonal eigenvectors corresponding eigenvalues. Also, the eigenvectors from the same eigenvalue are linearly independent.  I need an example of symmetric matrix such that the eigenvectors from the same eigenvalue are not orthogonal.  Also, I know that the eigenvalues of the symmetric matrix are real. But , this statement true iff the entries are real numbers.Right? Since the matrix 2x2 $$A=\begin{bmatrix} 1 &amp;i \\  i &amp;1  \end{bmatrix}$$  has non real eigenvalues execute drush command from devel/php drupal Can any one please tell me how can I execute drush command from devel/php?  I can execute PHP codes from devel/php. But I don't know how can I execute drush command from devel/php. (As we know "devel/php" URL coming from devel module).  I have written some custom drush command for cron purpose. I can able to run those commands from command line.  &gt; drush my-cmd or drush cc all or drush status , etc ... I can run it through command line.   Expecting some function as mentioned below to run from devel/php  some_function("drush cc all"); Is there a quick way to lock my Mac? On Windows you can hit the keys Windows+L to lock your computer if you step away.  I don't want to have to remember if sleep currently asks for a password, if there is a time out where my screen isn't locked during a short period. Even with Lion supporting resume of many apps, I don't want to log out.   I do want to be sure data is secure when stepping out for lunch or a smoke break. Escape character in LaTeX I need to output the below text but since \ is a special character, I cannot:  [RegularExpression(@"\d+")]   Also sometimes I need use dollar sign $ as well but it seems to be a special char, too.  What is the way to escape those in LaTeX?  UPDATE:  I used \verb as suggested but I am unable to run commands inside it. Also, in the output the font and the opacity of the text is different than the default one:  \verb|[RegularExpression(\newline @"\d+")]| Does $\sum_{k=1}^\infty\frac1{k^n}$ converge for $\Re(n)=1,\Im(n)\ne0$?  The ratio test is inconclusive.  It passes the term test for $\Re(n)=1$, but this is not sufficient to prove convergence.  Since we are dealing with so many complex numbers, I do not know of any convergence tests for this.  I know that if it is convergent, it is conditionally convergent. Someone flagged my question as already answered, but it's not I asked a question regarding a very specific feature of a program and whether or not it works with a larger program.  Within hours someone had marked it with "This question may already have an answer here of a similar question, but not related to my question.  The question I asked IS NOT ADDRESSED in the referred-to question. It's frustrating to spend half an hour putting together an intelligent and specific question, and then have someone mark it as a duplicate (or possible duplicate), which apparently causes people to skip over my question. I haven't received any more responses since the question was flagged.   Two questions:  (1) How do I get this flagging removed and (2) what's the best way to prevent these "helpful" flaggings in the future? I am interested in determining the ages of all 70+ my servers. I would like to create a growth graph showing when servers and databases were added to the environment either/both monthly or annually. I executed the following query using the SSMS multi-query feature with only partial success.  SELECT [name], create_date FROM sys.databases   It's partial success because the master and model databases return with a date of 'April 8, 2003' when I know that I created some of these servers during the past couple years.  I refresh databases from one server to another several times a week, which appears to be causing issues with the database create date.   Is there a simple method to determine the actual create date for both servers and databases? Term for words like Snowmageddon, Nipplegate and even cheeseburger? What kind of power management circuit do I need to embedded a rechargeable battery in my electronics project? I am doing a project where my electronics runs on 5V which I wanted to power from a 7.2v lipo regulated down to that voltage. I'd really like to include the opportunity to charge the lipo without removing it from the project. What kind of circuit/components do I need to do it properly?  Say, would putting a battery charging ic at the battery's terminals in parallel to my system be enough to achieve what I need? I'm using a PIN code to log on my computer. However, Num ⇩ is always turned off, even if on before shutting down my computer. This is quite annoying as I always have to retype my PIN.  I've tried the suggestions  (same as ). But with no result. If I don't enable num lock on log in screen and use the numbers above the normal keys, num lock turns on after log on. Then it's too late, unfortunately.  So, how can I make num lock enabled by default when logging in? Thanks.  Edit: While I still want to solve this, I've figured it is not such a big problem. I will need to press some key for the "enter PIN screen" to show, and using Num ⇩ works and enables num lock. But then, still annoying if the computer was only locked (with num lock on) and I turn it off, hehe. I've stumbled upon a strange behaviour with Windows machines, which seems to be fairly consistent between all Windows versions from Vista/2008 to 8.1/2012 R2; it doesn't happen instead when using Windows XP or Windows Server 2003.  The problem is this: when the network adapter is configured for DHCP and the DHCP server doesn't register DNS records on behalf of its clients (because it can't, or because it's not configured to do so), then the forward A record gets registered, but the reverse PTR record doesn't.  Some more details:   Both the forward and the reverse DNS zones are AD-integrated and accept dynamic updates. All computers are joined to the domain. All computers use the correct internal DNS servers, both when configured statically and when getting their configuration from DHCP. "Register this connection's addresses in DNS" is enabled in the network adapters. Everything is fine when a computer has a static IP address; both the forward and the reverse records get automatically registered. When the same computer is configured for DHCP, the forward record is registered, but the reverse record isn't. This happens for all computers with an OS version >= 6.0, and it's definitely not related to a single machine. No amount of ipconfig /registerdns will change anything. No errors are logged anywhere.   Why does this happen, and how can it be fixed?  And no, configuring the DHCP server to perform DNS registration is not an option here. What is a good data plan for Internet surfing in northern Italy? I've checked the webpages of some their providers, but franly, just like in the case of those in my own language, I literally cannot find my way around them. So if you wouldn't mind sharing a word of two or advice.  I'm looking for a good solution for mobile internet surfing in northern Italy, that can be connected to a laptop (you know, that usb stick with a SIM card inside kind of thing). 15 Gb or so at some decent speed. Can you perhaps give a recommendation or two of what to get?    Edit: Just to define what I'm looking for exactly. A data plan of 15 Gb with an internet key (usb stick into which a SMS card goes) that you plug into a laptop. Preferably non-contractual, so I can cancel when I leave. I am not interested in surfing on my mobile phone since due to size I still prefer the smaller Nokia-like models for calls (smaller to carry) - no internet on them. threeparttablex table notes for tabu tabulars with less than \textwidth Improved Help Center - site-specific pages and site-specific edits to all pages Right now, moderators can edit some pages in a site's Help Center. For example, the entire /help/on-topic page can be edited. However, the /help/dont-ask page can't be edited at all.  I'd like to see two changes to the Help Center:   All pages should be editable by site moderators. Some pages do apply to all sites, such as the /help/dont-ask page I mentioned above. However, it may be useful to edit in some site-specific guidance. The entire page doesn't need to be editable in order to ensure that key commonalities across the network remain in place on all sites. This uneditable content should be at the top of the page and moderators should be able to add site-specific content to the bottom. Moderators should be able to add new pages. Instead of maintaining meta tag [faq], FAQs can be added right into the Help Center from Meta. The Help Center serves as a single point of reference for the community rules, norms, and policies. Meta questions can be used to discuss updates to pages. This avoids issues such as question and answer ownership and the ability to accept/change accepted answers as users come and go from a site. An active site will always have diamond moderators to perform the edits to the Help Center.   Note that site-specific pages do already exist. , which no other sites have. This is something relevant to Stack Overflow (and perhaps a few other sites). It would be nice to allow sites that have this policy to link to their own Help Center for it and to edit the page to provide additional examples that may be relevant to their user base.