On all the sites I have an account I have the blue avatar, the same as here. But I just noticed that I have a red avatar on Area51. I read  why. Is there a way to get the same avatar on Area51 as I have on Meta? I'd prefer doing this without making Gravatar.
I just visited  and noticed that my profile picture is not the same as on all other sites.  According to  the image will be synchronized when synchronizing the complete profile. I did that but the image is still the same.  Then I wanted to change the image in the Area51 profile directly - but I can only change to a gravatar image and can't use the new and fancy Stack Exchange image.  Is that a bug?
Steps to Reproduce   Tap faster on the code. or Tap once on a huge code.   but happens only when  setupForGeneric() is called, might be a bug related to   private void setupForCode()   { String str = getIntent().getStringExtra("com.stackexchange.marvin:code_block"); PrettyWebView localPrettyWebView = (PrettyWebView)findViewById(R.id.code); localPrettyWebView.setPostBody("&lt;pre&gt;&lt;code&gt;" + TextUtils.htmlEncode(str) + "&lt;/pre&gt;&lt;/code&gt;", false); localPrettyWebView.setBackgroundColor("#eeeeee"); }  private void setupForGeneric() { String str = getIntent().getStringExtra("com.stackexchange.marvin:web_url"); PrettyWebView localPrettyWebView = (PrettyWebView)findViewById(R.id.code); localPrettyWebView.getSettings().setBuiltInZoomControls(true); localPrettyWebView.getSettings().setLoadWithOverviewMode(true); localPrettyWebView.getSettings().setUseWideViewPort(true); localPrettyWebView.loadUrl(str); localPrettyWebView.setBackgroundColor("#eeeeee"); }   Log  09-05 03:54:30.312: E/AndroidRuntime(26264): FATAL EXCEPTION: WebViewCoreThread  09-05 03:09:39.522: E/Crittercism(18318): java.lang.NullPointerException: [v0.1.22]  09-05 03:09:39.522: E/Crittercism(18318):   at android.content.ComponentName.&lt;init&gt;(ComponentName.java:75) 09-05 03:09:39.522: E/Crittercism(18318):   at android.content.Intent.&lt;init&gt;(Intent.java:3156) 09-05 03:09:39.522: E/Crittercism(18318):   at com.stackexchange.marvin.ui.ViewPopupActivity.showCode(ViewPopupActivity.java:25) 09-05 03:09:39.522: E/Crittercism(18318):   at com.stackexchange.marvin.ui.question.QuestionFragment$1.onCodeClicked(QuestionFragment.java:67) 09-05 03:09:39.522: E/Crittercism(18318):   at com.stackexchange.marvin.ui.common.PrettyWebView$WebAppInterface.codeClicked(PrettyWebView.java:197) 09-05 03:09:39.522: E/Crittercism(18318):   at android.webkit.WebViewCore.nativeTouchUp(Native Method) 09-05 03:09:39.522: E/Crittercism(18318):   at android.webkit.WebViewCore.nativeTouchUp(Native Method) 09-05 03:09:39.522: E/Crittercism(18318):   at android.webkit.WebViewCore.access$4000(WebViewCore.java:59) 09-05 03:09:39.522: E/Crittercism(18318):   at android.webkit.WebViewCore$EventHub$1.handleMessage(WebViewCore.java:1449) 09-05 03:09:39.522: E/Crittercism(18318):   at android.os.Handler.dispatchMessage(Handler.java:99) 09-05 03:09:39.522: E/Crittercism(18318):   at android.os.Looper.loop(Looper.java:137) 09-05 03:09:39.522: E/Crittercism(18318):   at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:790) 09-05 03:09:39.522: E/Crittercism(18318):   at java.lang.Thread.run(Thread.java:856) I've taken some stock photography of lots of clear bottles, and now want to remove the background (which is white-ish, because at a pinch I could leave it...) so that the bottle becomes transparent with highlighting.  My bottles are clear with different colored liquids with multiple refraction and reflection surfaces.  I am looking for a background color subtraction effect that will allow me to get to transparent (hopefully with some sort of effect/opacity slider).  Ideas that I can't pull off yet:   Combine layer with a color fill layer (keyed off the "transparent color") in some manner to produce some output that could be used as the starting point of a layer mask Same layer combination as above, but somehow translating "pure white" to transparency.   Notes for what doesn't work (Photoshop terminology):   "Color Range" and delete (fuzzy select, but not graded/alpha) - results in harsh lines and only leaves the pure white and dark highlights and shadow refractions/reflections Magic wand selections for the same reason "Background Eraser" because although it is able to only subtract a certain color and leave "the rest", it (like all tolerance based tools) eventually hits a colour slightly outside of the range that it just won't touch.   I'll add more if I can remember what I've found Egyptian fractions with prime power denominators summing to 1? Inspired by        Can we solve the equation $$1=\frac{1}{a_1}+\frac{1}{a_2}+\frac{1}{a_3}+\cdots +\frac{1}{a_n}$$ where $a_1,a_2,a_3,\cdots ,a_n$ are distinct prime powers (primes are allowed) ?   I tried a modified greedy-algorithm with different starting vectors and brute force with $6$ entris with limit $200$, but did not find a representation. How can I ensure testNG test method does not abort if any assert fails I know there is a difference between assert and verify in Junit; the assert results in a runtime exception, causing test method execution to abort. To overcome this problem, we can have verify which will make test case fail, but allowing test execution to proceed rather than getting aborted.  I doubt there is any such built in approach in testNG. I do understand that best practices say, there should not be multiple asserts in same test case.  But, in practical world, we do come across scenarios where we need to have multiple checkpoints in one test case and we don't want our test method to abort because of one check point failure (test execution should proceed despite failure).  How can we use a soft assert mechanism, similar to verify, which will not abort test method when there is a checkpoint failure.  Example:  @Test(dataProvider = "getMailUrl") public void testMail(email,subject); Assert.assertFalse(subject.isEmpty);//1st checkpoint Assert.assertNotNull(email); //2nd checkpoint Assert.assertEquals(email, "feedback@yoursite.com"); //3rd checkpoint   Now, I want test execution to proceed, even if the 1st checkpoint (validation of subject being not empty) fails. Definitely we will be not be using assert (hard assert). We will need concept of soft assert similar to verify (facilitated by Junit).   I understand, we have to build a customListener implementing TestNG interfaces or extending existing listeners such as TestListenerAdapter. I am still struggling - how can we do this? Where can questions about our community-run moderation tools be asked? The question  was recently closed due to not being "about the software that powers the Stack Exchange network, within the scope defined in the help center." MEE is Johann Gambolputty made a comment that     SmokeDetector is a community run project to help to fight spam. Therefore your question is unfortunately off-topic for this site. You can find help in  chatroom.   If questions about community run moderation bots (e.g. SmokeDetector, FireAlarm, Natty, Queen, etc.) are off-topic here on Meta Stack Exchange, is there anywhere on the Stack Exchange network where one can post a Question and Answer-style question on them, or are they only on-topic in appropriate chat rooms? Countable union of countable sets(ZF) Missing $ inserted UV mapping a straight image around a ring shaped flat mesh Is it possible to mapping a image around a ring shaped mesh? I would imagine there should be a way to curve/distort the image around the mesh. If not, how can I straighten out the mesh easily instead to fit the image? Are there any official specifications regarding the torque for camera mounts? I've been wondering why I've never seen any official specifications of the maximum allowed torque that can be exerted upon lens mounts. It seems to me like a very useful specification, but I can't seem to find it from any manufacturer.  indicates that there might be no specifications for Nikon mounts. Are there really no manufacturer that publish these specification of their mounts? Using round function in QGIS expression? How to clear the interpreter console? What is a good book to study linear algebra? I'm looking for a book to learn Algebra. The programme is the following. The units marked with a $\star$ are the ones I'm most interested in (in the sense I know nothing about) and those with a $\circ$ are those which I'm mildly comfortable with. The ones that aren't marked shouldn't be of importance. Any important topic inside a unite will be boldfaced.  U1: Vector Algebra. Points in the $n$-dimensional space. Vectors. Scalar product. Norm. Lines and planes. Vectorial product.  $\circ$ U2: Vector Spaces. Definition. Subspaces. Linear independence. Linear combination. Generating systems. Basis. Dimesion. Sum and intersection of subspaces. Direct sum. Spaces with inner products.  $\circ$  U3: Matrices and determinants. Matrix Spaces. Sum and product of matrices. Linear ecuations. Gauss-Jordan elimination. Range. Roché Frobenius Theorem. Determinants. Properties. Determinant of a product. Determinants and inverses.  $\star$ U4: Linear transformations. Definition. Nucleus and image. Monomorphisms, epimorphisms and isomorphisms. Composition of linear transformations. Inverse linear tranforms.  U5: Complex numbers and polynomials. Complex numbers. Operations. Binomial and trigonometric form. De Möivre's Theorem.  Solving equations. Polynomials. Degree. Operations. Roots. Remainder theorem. Factorial decomposition. FTA. Lagrange interpolation.  $\star$ U6: Linear transformations and matrices. Matrix of a linear transformation. Matrix of the composition. Matrix of the inverse. Base changes.   $\star$ U7: Eigen values and eigen vectors Eigen values and eigen vectors. Characteristc polynomial. Aplications. Invariant subspaces. Diagonalization.   To let you know, I own a copy of Apostol's Calculus $\mathrm I $ which has some of those topics, precisely:   Linear Spaces Linear Transformations and Matrices.   I also have a copy of Apostol's second book of Calc $\mathrm II$which continues with   Determinants Eigenvalues and eigenvectors Eigenvalues of operators in Euclidean spaces.   I was reccommended Linear Algebra by Armando Rojo and have Linear Algebra by , which seems quite a good text.   What do you reccomend? I need a P&amp;S camera for my family. They would probably use it for family functions,trips etc. I want a camera with flash for taking good night photos with a decent quality. They are not technically inclined and I dont want much manual features apart from the normal modes (potrait,sports,landscapes). Decent picture quality for normal conditions is the criteria I am looking for. If the camera looks little big, it is an added advantage.  I have looked at few models like Fujifilm Fine Pix F800 EXR, the Panasonic Lumix DMC series and a Nikon P510. But I am confused with all the options and the different reviews on different sites. My thinking is that for a point and shoot camera, it is better to consider brands other than Nikon and Canon since they may provide better value for money.   Can someone recommend some good resources for analysis and what kinds of cameras I should consider - a bridge camera, a basic point and shoot, or some other type? Find all polynomials $P(x)$ such that $P(x^2)=P(x)^2$ Find all polynomials $P:\mathbb{C}\rightarrow\mathbb{C}$ such that $$P(x^2)=P(x)^2 .$$   Here is what I tried:  First, it is easy to see the constant solutions, namely $P\equiv 0,P\equiv 1$.  Let $r$ be a root of $P$ (i.e. $P(r)=0$). It follows that all terms in the infinite sequence $r,r^2,r^4,\dots,r^{2n},\dots$ are roots of $P$. To avoid a polynomial with infinite roots, we have to have the sequence be periodic. So it turns out that either $r=0$, or the roots of $P$ are roots of unity of degree $2n$ for some $n\in\mathbb{N}$.  In the first case, we get $P(x)=xQ(x)$. Plugging in, we get $$x^2Q(x^2)=x^2Q(x)^2\implies Q(x^2)=Q(x)^2 ,$$ i.e. that $Q$ satisfies the same condition as $P$.  In the second case, we have $P(x)=(x^{2n}-1)Q(x)$. Plugging in, we get $(x^{2n}-1)Q(x^2)=(x^{2n}-2x^n+1)Q(x)^2$. I was not sure how to proceed from here. I want every new user from now on to have bash as their shell by default.    I know that to change your own shell to bash, you would use the command "chsh -s /bin/bash", but how do I automatically set all future users' shell to bash by default? How do TTL NAND gates work? This is supposed to be a simple NAND gate. I understand how the output is 1 if one of the inputs is zero but if both inputs are 1 then the base of Q1 is supposed to be zero. This is what I don't understand. I know that Q2 and Q3 will be in cut off so the base of Q1 is floating. If that is true, how is it zero then?When A and B are open does current flow through Q2  Q3 via R1 to turn on Q1? How to set root password to null What is a good way to transform Cyclic Ordinal attributes? Filter the score of the questions on the homepage before loading them At the moment questions on the homepage are loaded by the top N most recent and then ones with a score of -4 or less are filtered out. This doesn't make much difference for a user who is logged in but consider anonymous users; their home page is only 15 questions in length. If someone was to edit several posts that bump to the top with a score of -4 or less then the home page looks tiny. At the moment on SFF, for example, the homepage for anonymous users only shows 9 questions:  At one point it only showed 3 questions (a few weeks back):  Can the filtering logic be changed to before the questions are loaded to appear on the homepage? After monitor calibration colors on my two monitors are still different, why? I have a pair of pretty nice monitors (HP ZR30w) which I calibrated with a pretty good calibrator (i1-Pro) and after I calibrated both they still show colors every so slightly differently.  My left monitor has a little more magenta color to it in photos.  Is monitor calibration only ment to get things 'close'?  Other people in the office have experienced similar issues with their pairs of monitors, both HP ZR30w and Dell 3007WFP-HC monitors.  If I can't even get colors to match between my two exact same monitors connected to the same computer I have little confidence that colors on my monitors will look the same on somebody else's calibrated monitor :p