London to Chennai, with two stops inside the Schengen area?
Is a Schengen visa/transit visa required for a transit flight through two Schengen airports?
Getting a credit card exclusively for the sign-up bonus There are quite a few credit cards with exceptional sign-up bonuses (and then fairly average terms). If I signed up for one, fulfilled the spending conditions for the signup bonus, used that bonus, paid off the card and then cancelled it immediately after, would there be a significant impact on my credit history?  I suppose it would divert spending away from my primary credit card (the one I never close), which would reduce slightly the spending history I have on that card. Essentially, the record of my spending on these auxiliary cards would be erased when those cards were canceled. But is there a penalty to my credit score for closing a card beyond the loss of history that was on the closed card? What would be the nicest proof of the following theorem:  If $\lim\limits_{n \rightarrow \infty} a_{n} = \infty$, then $\lim\limits_{n \rightarrow \infty} \left(1 + \frac{1}{a_{n}} \right) ^ {a_{n} } = e$. If $\lim\limits_{n \rightarrow \infty}b_{n} = 0$, then $\lim\limits_{n \rightarrow \infty} \left(1 + b_{n} \right) ^ {\frac {1} {b_{n}} } = e$.  I somehow failed to find a proof here on the website and in the literature. Why AUC =1 even classifier has misclassified half of the samples? I am using a classifier which returns probabilities. To calculate AUC, I am using pROC R-package. The output probabilities from classifier are:  probs=c(0.9865780, 0.9996340, 0.9516880, 0.9337157, 0.9778576, 0.8140116, 0.8971550, 0.8967585, 0.6322902, 0.7497237)   probs shows probability of being in class '1'. As shown, the classifier has classified all of samples in class '1'.  True label vector is:  truel=c(1, 1, 1, 1, 1, 0, 0, 0, 0, 0)   As shown, classifier has misclassified 5 samples. But, AUC is:  pROC::auc(truel, probs) Area under the curve: 1   Could you please explain to me why it happens? How would I go about detecting monopoles? A question needed for a "solid" sci-fi author: How to detect a strong magnetic monopole? (yes, I know no such thing is to be found on Earth).  Think of basic construction details, principles of operation and necessary components of a device capable of detecting/recognizing a macroscopic object emitting magnetic field of equivalent of order ~0.1-10 Tesla near its surface, but with only one pole, reliably distinguishing it from normal (2-pole) magnets, preferably at a distance.  Preferably a robust method, not involving extremely advanced technology. Detect the presence, possibly distance (or field strength) and direction.  I know of SQUIDs, but these concentrate on extreme sensitivity. I'm thinking of something less sensitive but more robust (like, no need for the monopole to fall through the loop) and still able to recognize a monopole against a magnet.  Also, how would such a macroscopic object behave practically? Such a "one-pole magnet" about the size and strength of a refrigerator magnets - how would it behave around ferromagnetics, normal magnets and so on? 100% Delete U2 from iPhone? I've looked up many ways on how to deal with the U2 songs on my phone, but they will not go away what ever I try.  The most common solution for this problem is to "Show all" music, go to the Music, click the iCloud download button to download it and then turn off "Show all" button again. Generally, this would work but in my situation, it says I haven't purchased the song and I can't download the song again. The song still plays when I click on it, but I can't swipe left to delete and I can't hide it. And yes, I am signed into iTunes. And no, it is not under my purchased section.  Is there any other way to rid of this song?   EDIT:  I'm running iOS7.1.2 on a iPhone5c And the song(s) aren't in my iTunes. It says I have zero items in my iTunes library and it isn't under my purchased songs. The song is only on my iPhone, and I can't redownload it (to delete it again) because then I'd have to purchase the song again.  Thanks. In Minecraft, I know you can breed animals. In fact, in recent updates it's required for the player who just can't start their mornings without bacon and eggs!  I've tried pulling two pigs together in a single pen, but all they do is snort at me. And the chickens? Well, there's plenty of eggs, but no hatching.  How do I get them to make more bacon and eggs? I have 2 monitors connected to a NVIDIA GeForce GTX 660:   Left is 1920x1080 via DVI (Samsung SyncMaster 2443BW) Right is 2560x1440 via DisplayPort and is set to Primary (Samsung SyncMaster SA850)   I often leave my computer running overnight (working on long render job, doing backups, etc) so I only power off my monitors manually. However, if I power off the primary monitor, it is disabled completely as if it were unplugged from the graphics card (i.e. icons are moved, open apps are moved and resized to fit on the new primary monitor). If I switch from DP to a DVI cable, this does not occur. It seems to be an issue when using DisplayPort.  Is there a way to disable the monitor from being disabled completely in Windows when I power it off physically?   I have found no relevant settings in either Windows Display settings, nor the NVIDIA control panel software.  Edit #1: I'm using an .  Edit #2: Here is a screenshot of my NVIDIA Control Panel v7.2.710.0:   Edit #3: Here are screenshots of my Monitor configuration:    Clicking on Advanced settings reveals a Generic PnP monitor running at 59 Hz? 60 Hz is the only other option available.    Here is my secondary monitor which is connected via DVI:    Edit #4: If I open the "Screen Resolution" configuration panel and power the monitor off (via the power switch), this is what is shown:    It looks like I disconnected the monitor from the video card. Splicing a list of arguments into a function with Sequence Making your Windows 7 a WIFI hotspot for Android? I use a broadband dongle on my Windows 7. I want to expose my laptop as a wifi hotspot so that i can use internet on my samsung galaxy ace.  I have tried Connectify but my chipset is not supported so it simply make the adhoc network. Tried Bzeek. My phone get connected, but no browsing.  Any solution that you guys have?  PS: I am in no mood to root my device. Java rounding to nearest 0.05 With $x+y\ge z$ $(x,y,z\ge0)$, prove that: $$\frac{x}{1+x}+\frac{y}{1+y}\ge\frac{z}{1+z}$$  I'm aware that using analytic view this is easy since $f(x)=\frac{x}{1+x}$ is concave in $[0,\infty)$. However I want to prove it using merely algebraic techniques. Is that possible? Origin of the term "fun fact" Where does the term "fun fact" originate?-- namely, not with the compositional meaning but rather with the idiomatic usage to introduce some sort of unusual, esoteric, absurd or otherwise "controversial" fact? How to associate multimedia keys to Foobar2000? Earlier I asked a question about  and got the answer that while it is only necessary for anonymous types, that it is used nonetheless to make writing code 'quicker'/easier and 'just because'.  Following  I saw that var gets compiled down to the correct type in the IL (you will see it about midway down article).  My question is how much more, if any, IL code does using the var keyword take, and would it be even close to having a measurable level on the performance of the code if it was used everywhere? Command to move a file to Trash via Terminal I would like to know if there is a command I can issue in a terminal so I do not classically remove (rm) the file, but instead move it to trash (i.e. Nautilus Move to Trash behavior).  In case there is such a command, I would also be interested in knowing what it is. How do I save a file with managed_file in a theme? I'm developing a theme that it requires to have a header image on the front page, so I have this.  casper.theme  function casper_form_system_theme_settings_alter(&amp;$form, &amp;$form_state) {  $form['theme_extra']['front_page_background_image'] = array(     '#type' =&gt; 'managed_file',     '#title' =&gt; 'Front Page Background Image',     '#description' =&gt; 'Add background image for the front page',     '#required' =&gt; FALSE,     '#weight' =&gt; -4,     '#upload_location' =&gt; file_default_scheme() . '://theme/backgrounds/',     '#default_value' =&gt; theme_get_setting('front_page_background_image' , 'casper'),     '#upload_validators' =&gt; array(         'file_validate_extensions' =&gt; array('gif png jpg jpeg'),     ),  ); }   However, after it, while the file been missing and after some reading, I find out that is because managed_file does not save your image permanent.   There are similar questions:    is specified to Drupal 7.  is using "file" type instead of managed_file. I already tried something similar to what the Mayo theme is doing, but I was not able to successfully figure it out.   How can I save my image permanently? Is it possible to combine processing power of 2 computers? Show that  $$\frac{\sin x}{\cos 3x}+\frac{\sin 3x}{\cos 9x}+\frac{\sin 9x}{\cos 27x} = \frac{1}{2}\left(\tan 27x-\tan x\right)$$ Updated DNS zone can't be seen from my local network In high Reynolds numbers we have turbulent flow. This is because the inertial forces are much greater than the viscous forces. I understand inertial forces to be actually the fictional forces due to the momentum of the moving fluid. And viscous to be the forces that drag each layers together. But why when inertial forces are too high than the viscous forces, there is turbulence? Why don't the molecules just continue to move laminarly due to their momentum? I can assume the viscous forces are not very strong in high speeds (in high inertial forces) to keep them together to form a laminar flow? But again, why they result in irrational movement after the effect of viscous forces is not anymore considerable? As a mechanical analogue, if I have balls attached together and make them travel linearly, and remove their between them attachment, they can continue to travel linearly. But what happens in fluid molecules that turbulence is created?