The chain stay angle is the angle between chain stay and seat tube? I need a new front derailleur for my Shimano Acera T3000 gear shift. I have to choose between:     They differ only in the chain stay angle they are made for. The info I find on what the &quot;chain stay angle&quot; is seems partly contradictory or unclear. So I want to make sure I got this: The chain stay angle is the angle between chain stay and seat tube - is that correct? Or more precise the angle between AB and AC with:  A: bottom bracket axis B: axis of rear wheel C: &quot;middle point&quot; at the top of the seat tube   Here's  with measured angles:  of the angles in question only the one between seat tube and chain stay (68°) falls into the interval [63,69] ... so, it has to be that one, I suppose. From my mechanical, geometrical intuition I don't see why that angle is relevant for the FD. It should be ∠(KK',KC) in my opinion!?
Selecting a front derailleur: parameters The spec sheet for the Shimano Alivio FD-M430 front derailleur contains a number of points that I don't understand.   What does "Maximum capacity: 22 teeth" mean? Why are "Top gear teeth" constrained to "44/48T"? Is there anything wrong with 46? What is "Cable Routing: dual-pull type"? And most puzzling, what is "Chain Stay Angle  63-66 / 66-69" and how do I measure mine?
When I try to move, rename, or delete a file named ␀in Finder, I get this error message:     The operation can't be completed, because an unexpected error occured (error code -50).   With mv, rm or find -delete in Terminal   rm: /Library/␀: Invalid argument  mv: rename /Library/␀ to /tmp/␀: Invalid argument  find: -delete: unlink(/Library/␀): Invalid argument   Can I move or delete this file in Mac OS X or do I have to use another operating system?  I even tried creating a file with this name in /tmp and it has not gone away since 8 reboots. I unplugged my USB stick from Ubuntu 16.04 without the save remove option, but exfat should be fine doing so. No read write was happening, the partition does not use journaling. What I end up with is an unmountable USB stick with checksum error.   What tools are there to recover the partition table or at least the data on the USB stick? What I am doing now is scanning via parted. Has anyone experienced the same problem with exfat and recovery options? Unfortunately parted probably won't detect the partition because .  I also tried to use Partition Wizard on Windows but it failed to detect anything, just showing unallocated space. How do I proceed? are there helpful tools under Windows or Ubuntu?    I also tried to use gpart -v /dev/sdb but it failed to detect anything. On OS X there is a tool called fsck_exfat, is there any on Windows?  update The disk is preinstalled with Parted Magic. After quick search no partition shows up. Open a direct file on the hard drive from Firefox (file:///) I have a small PHP system I created for myself. This system contains a few .doc and .docx file documents. I want to be able to open them directly from the browser without downloading them.  I created a link: &lt;a href="file:///c:/mysite/myfile.docx"&gt;myfile&lt;/a&gt;. But Firefox does not open the link. href="http://localhost/myfile.docx" works fine - it offers me to download the file.  Any ideas on how I can do it? Do I need to change something in the Firefox options or security settings? Clear Android Market Search History? Any thoughts on how one might clear the Android Marketplace search history? For instance, if I recently searched for an android app in the marketplace, the marketplace search maintains a history list of which apps/keywords that I have recently looked for.    Thanks in advance! I am working on refactoring some old code and have found few structs containing zero length arrays (below). Warnings depressed by pragma, of course, but I've failed to create by "new" structures containing such structures (error 2233). Array 'byData' used as pointer, but why not to use pointer instead? or array of length 1? And of course, no comments were added to make me enjoy the process...  Any causes to use such thing? Any advice in refactoring those?  struct someData {    int nData;    BYTE byData[0]; }   NB It's C++, Windows XP, VS 2003 If $x_1,x_2,\ldots,x_n$ are real numbers larger than $1$, prove that $$\dfrac{1}{1+x_1}+\dfrac{1}{1+x_2}+\cdots+\dfrac{1}{1+x_n} \geq \dfrac{n}{\sqrt[n]{x_1x_2\cdots x_n}+1}$$   Attempt  AM-GM doesn't work here since we will get an upper bound. I don't see Cauchy-Schwarz working either. Thus, I think a substitution might work, but I am unsure of which one to use. What does this depiction of a black hole in the movie Interstellar mean? Replace Tag of and xml file after pattern matching using shell I have an input xml file like below INPUT FILE &lt;ReconSummary&gt; &lt;entryName&gt;Total Deep&lt;/entryName&gt; &lt;Code&gt;777&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;   &lt;ReconSummary&gt; &lt;entryName&gt;Total Saurav&lt;/entryName&gt; &lt;Code&gt;666&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;   &lt;ReconSummary&gt; &lt;entryName&gt;Total Ankur&lt;/entryName&gt; &lt;Code&gt;555&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;  I want to comment the tag if i find the pattern &quot;Total Deep&quot; so that the output file looks like below OUTPUT &lt;!--&lt;ReconSummary&gt; &lt;entryName&gt;Total Deep&lt;/entryName&gt; &lt;Code&gt;777&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;--&gt;   &lt;ReconSummary&gt; &lt;entryName&gt;Total Saurav&lt;/entryName&gt; &lt;Code&gt;666&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;   &lt;ReconSummary&gt; &lt;entryName&gt;Total Ankur&lt;/entryName&gt; &lt;Code&gt;555&lt;/Code&gt; &lt;License&gt;L&lt;/License&gt; &lt;Tran&gt;H20&lt;/Tran&gt; &lt;job&gt;1234&lt;/job&gt; &lt;/ReconSummary&gt;  Since i am new to shell scripting, can anyone help me out as to how i can apply this with the help of shell scripting? Filling triangle doesn't seem to work with PGF/TikZ I was wondering if anyone had any clue on why my triangles are not filled in red within the following piece of code:  \documentclass{article} \usepackage{tikz} \usetikzlibrary{calc,3d}  \usepackage[active, pdftex, tightpage]{preview} \PreviewEnvironment[{[]}]{tikzpicture} \newcounter{number}  \begin{document} \begin{tikzpicture}[x  = {(-0.5cm,-0.5cm)},                     y  = {(0.9659cm,-0.25882cm)},                     z  = {(0cm,1cm)}] \begin{scope}[canvas is yx plane at z=0] \foreach \x / \y / \label in {1 / 0.4 / 1, 0.9 / 0.4 / 0, 1 / 0.5 / 1, 0.7 / 0.3 / 0, 0.8 / 0.4 / 0, 0.9 / 0.5 / 0, 1 / 0.6 / 1, 0.7 / 0.4 / 0, 0.4 / 0.4 / 0, 0.6 / 0.4 / 0, 0.5 / 0.4 / 0, 0.8 / 0.5 / 0, 0.9 / 0.6 / 0, 1 / 0.7 / 1, 0.7 / 0.5 / 0, 0.5 / 0.5 / 0, 0.4 / 0.5 / 0, 0.6 / 0.5 / 0, 0.8 / 0.6 / 0, 0.9 / 0.7 / 0, 1 / 0.8 / 1, 0.7 / 0.6 / 0, 0.6 / 0.6 / 0, 0.5 / 0.6 / 0} { \addtocounter{number}{1} \pgfmathparse{\value{number}}\let\k\pgfmathresult \draw (8 * \x, 8 * \y) node[inner sep=0, outer sep = -0.1pt,color=black,fill,circle] (node-\k) {}; };  \foreach \x / \y / \z / \trash in { 4/5/8/0, 9/11/16/0, 9/16/17/0, 11/10/18/0, 11/18/16/0, 10/8/15/0, 10/15/18/0, 8/5/12/0, 8/12/15/0, 5/2/6/0, 5/6/12/0, 2/1/3/0, 2/3/6/0, 17/16/24/0, 16/18/23/0, 16/23/24/0, 18/15/22/0, 18/22/23/0, 15/12/19/0, 15/19/22/0, 12/6/13/0, 12/13/19/0, 6/3/7/0} { \draw[fill=red]  (node-\x) --  (node-\y) --  (node-\z) -- cycle; } \end{scope} \end{tikzpicture} \end{document}) Similar to '', is it also ok to add an example?   I was going to  but I noticed that one answer had most of the things I needed to say, except perhaps that the questioner didn't perhaps understand the answer and  I feel that an example may help. Limit of $\lim_{n\rightarrow \infty} \sum^{n}_{i=1} \frac{1}{\sqrt {n^2 +i} }$ Where's my Vox Populi badge? Possible Duplicate:          I was a very good boy yesterday, voting 40 times (and getting the message that told me to wait until the next day before voting again) on a good mix of questions and answers. But I didn't receive the Vox Populi badge for it. What gives? How does RNA polymerase II CTD bind to the RNA modification proteins if the tail is flexible? The tail of RNA polymerase II is flexible, not folded into a fixed structure , but does each repeat have more &quot;rigid&quot; structure (i.e. fold into a structure that has less rotation freedom inside a repeat)? If not, then how can the proteins bind some repeat with high specificity? (you can't make lock and key with soft material) A comparison between the verbs (come in / by), (drop in / by), (check in / by) (step in / by) and come over Reporting Mann-Whitney U-Test without homogenity of variance The Mann-Whitney test requires homogeneity of variance if a median difference is suppossed to be statistically significant.  In case homogenity of variance is not met, but the test is significant:  Which aspects of the test can I report? Get program execution time in the shell I want to execute something in a linux shell under a few different conditions, and be able to output the execution time of each execution.  I know I could write a perl or python script that would do this, but is there a way I can do it in the shell? (which happens to be bash) Are fractions with prime numerator and denominator dense? So the question is in the title. And I mean dense in positive real numbers ofcourse. Somehow I cannot grasp if this is very trivial or not. The prime numbers aren't that dense, but are there enough of primes to make the fractions constructed from them dense? How can I pass a command line argument into a shell script? I know that shell scripts just run commands as if they were executed in at the command prompt.  I'd like to be able to run shell scripts as if they were functions... That is, taking an input value or string into the script.  How do I approach doing this? From , page 209:     Dividends   Dividends are income paid by investments. Both bond funds   and stocks can  pay dividends. Bond fund dividends (the interest paid   by the individual  bonds in a fund) tend to be higher (as a percentage   of the amount you have  invested in a fund). When a dividend   distribution is made, you can receive  it as cash (which is good if   you need money to live on) or reinvest it into  more shares in the   fund. In either case, the share price of the fund drops to  offset the   payout. So if you’re hoping to strike it rich by buying into a bunch    of funds just before their dividends are paid, don’t bother. You’ll   just end up  paying more in income taxes.    It is talking about mutual funds.   I've never played with stocks.  However, I would like to know more about it.  Does the bold text imply the stock price will drop because of a company giving out a dividend? I have recently noticed a huge (>3.5GB) file in the DCIM/.thumbnails folder. I have tried deleting it, but the next time I open the Camera app it rebuilds the file (and locks up the phone, sometimes displaying a "media scanning in progress" message, in the process.)  The total file size of all the (approximately 2,000) photos displayed in the Gallery is around 500MB. There are in addition around 35,000 images in folders which contain .nomedia files to instruct Android to ignore the media therein. The total file size of these is around 1.5GB. The Gallery app is correctly ignoring these images, but I wonder whether the Camera app is misbehaving and actually processing them.  I think this problem has emerged since the ICS upgrade ... either when the phone (Samsung Galaxy Note) was first updated from Gingerbread or at some later date.  Any ideas, please?