Until a few days ago when the top bar was redesigned, there was a useful feature to quickly view interesting new questions on the other SE sites. It provided (at least for me) a good opportunity to raise my interest in the other stackexchange sites.  Is this feature removed, or just harder to access?
Since the new top bar has been rolled out - a number of different people, established and new users alike, have asked questions on where a specific link has disappeared to with the new top bar design. Where has the link to &lt;X&gt; gone?
I have looked for similar questions here on stack exchange. The closest example to this that I found is . That question assumed less than perfect absorption of material lining the inside of the sphere, and the effect of thermally re-radiating it inside the sphere.  A lot of the answers focused on that much of the thermal radiation would not be reflected back to the star, and is likely to be reabsorbed by the sphere at another location. On the other hand, this question asks what would happen if the Dyson sphere, using mirrors, deliberately refocus a significant portion of the rays directly back at the star. What is divergence? proving the inequality $\triangle\leq \frac{1}{4}\sqrt{(a+b+c)\cdot abc}$ How do you change from icon to list view in 20.4 What happens to waves when they hit smaller apertures than their wavelenghts? Why isn't an infinite direct product of copies of $\Bbb Z$ a free module?   Actually I was asked to show that it's not projective, but as $\Bbb{Z}$ is a PID, so it suffices to show it's not free.   I am stuck here. I saw some questions in SE, but there is no satisfactory answer at all. How do you return from 'gf' in Vim I am using Vim for windows installed in Unix mode. Thanks to this site I now use the gf command to go to a file under the cursor.  I'm looking for a command to either:   return to the previous file (similar to Ctrl+T for ctags), or   remap gf to automatically launch the new file in a new window. How to prove that $\lim \limits_{n\rightarrow \infty} \frac{F_{n+1}}{F_n}=\frac{\sqrt{5}+1}{2}$ Standard deviation of binned observations I have a dataset of sample observations, stored as counts within range bins. e.g.:  min/max  count 40/44    1 45/49    2 50/54    3 55/59    4 70/74    1   Now, finding an estimate of the average from this is pretty straight forward.  Simply use the mean (or median) of each range bin as the observation and the count as a weight and find the weighted average:  $$\bar{x}^* = \frac{1}{\sum_{i=1}^N w_i} \sum_{i=1}^N w_ix_i$$  For my test case, this gives me 53.82.  My question now is, what's the correct method of finding the standard deviation (or variance)?  Through my searching, I've found several answers, but I'm unsure which, if any, is actually appropriate for my dataset.  I was able to find the following formula both  and .  $$s^{2*} = \frac{ \sum_{i=1}^N w_i (x_i - \bar{x}^*)^2 }{ \frac{(M-1)}{M} \sum_{i=1}^N w_i }$$  Which gives a standard deviation of 8.35 for my test case.  However, the Wikipedia article on  gives both the formula:  $$s^{2*} = \frac{ \sum_{i=1}^N w_i}{(\sum_{i=1}^N w_i)^2 - \sum_{i=1}^N w_i^2} \sum_{i=1}^N w_i(x_i-\bar{x}^*)^2$$  and  $$s^{2*} = \frac{1}{(\sum_{i=1}^N w_i) - 1} \sum_{i=1}^N w_i(x_i-\bar{x}^*)^2$$  Which give standard deviations of 8.66 and 7.83, respectively, for my test case.  Update  Thanks to @whuber who suggested looking into Sheppard's Corrections, and your helpful comments related to them.  Unfortunately, I'm having a difficult time understanding the resources I can find about it (and I can't find any good examples).  To recap though, I understand that the following is a biased estimate of variance:  $$s^{2*} = \frac{1}{\sum_{i=1}^N w_i} \sum_{i=1}^N w_i(x_i-\bar{x}^*)^2$$  I also understand that most standard corrections for the bias are for direct random samples of a normal distribution.  Therefore, I see two potential issues for me:   These are binned random samples (which, I'm pretty sure, is where Sheppard's Corrections come in.)  It's unknown whether or not the data is for a normal distribution (thus I'm assuming not, which, I'm pretty sure, invalidates Sheppard's Corrections.)   So, my updated question is; What's the appropriate method for handling the bias imposed by the "simple" weighted standard deviation/variance formula on a non-normal distribution? Most specifically with regards to binned data.  Note: I'm using the following terms:     $s^{2*}$ is the weighted variance   $N$ is the number of observations.  (i.e. the number of bins) $M$ is the number of nonzero weights.  (i.e. the number of bins with counts) $w_i$ are the weights  (i.e. the counts) $x_i$ are the observations.  (i.e. the bin means) $\bar{x}^*$ is the weighted mean. Add "upload media" button in meta box field I have a custom post which has a meta tag that needs to be using a file upload (for video files). I am wondering, what is the correct way of adding an "Upload" button that points to the WordPress media uploader and sets the url of the selected uploaded file to the text field that caused that associates the upload button.  I am not looking for code on creating the actual meta tag option, but for a way to actually add a Wordpress media upload button properly. Is the phrase "it's just a matter of semantics" meaningless? I hear this phrase from time to time, and I really don't know what it means.  Two people are debating, and one says "the difference between your position and mine is just a matter of semantics."   This would seem to me to be quite an important difference.  That is, if one person means one thing, and the other person means something else, then they really do have different positions.  If they said "it is just a matter of terminology" or "just a matter of phrasing" I would get it.  But if someone says "we differ only what we mean" ... it kinda makes me chuckle because it seems to be saying that their meaning is not important, as if the argument was primary and the positions they take a secondary consideration.  So I started looking around for examples of this. I guess it seems that there is a popular notion that semantics is about very fine distinctions, such as:   Another interpretation seems to be that semantics is the difference between two ways of saying the same thing:   Maybe it is just a way of stopping an annoying conversation:   And then there is some usage that I simply don't understand:    And also:   Still, to me it is just a meaningless phrase.  Am I missing an important meaning here? The following will cause infinite recursion on the == operator overload method      Foo foo1 = null;     Foo foo2 = new Foo();     Assert.IsFalse(foo1 == foo2);      public static bool operator ==(Foo foo1, Foo foo2) {         if (foo1 == null) return foo2 == null;         return foo1.Equals(foo2);     }   How do I check for nulls? According to the , when a Shinigami dies, their remaining lifespan is given to the human they saved.     Shinigami who die are reduced to dust, and their remaining lifespan is given to the human they saved.   Since Rem killed L and Watari, she gained their remaining lifespans. Additionally she probably still had some lifespan left. On top of that Misa was already given a lot of lifespan from Gelus (from which she lost 75% again). So does this mean all of this lifespan is transferred to Misa Amane?!  Yet according to her , she dies in 2011 at the age of 26, only seven years after Rem died.  Does this mean that humans are also capable of reducing their own lifespans? Or would the author have made a mistake by letting Misa die as early as she has? I know she lost 75% of her remaining lifespan through the two eye deals, but you'd think that the cumulation of L, Watari and Rem's remaining lifespans would be greater than just one year, wouldn't you? I have always believed that it was ok to replace a capacitor with a slightly higher voltage rated one. eg 16v with 25v.Going higher than this would risk the capacitance value being out at the working voltage. However I just read the following quote from this       Electrolytic capacitors are non-ferroelectric with a very low dielectric constant. Their capacitance is derived from a very high surface area and nanometer thick dielectric layers. Their capacitance is not a function of applied voltage.‐Design Solutions For DC Bias In Multilayer Ceramic Capacitors (August 2010 Electronic Engineering Times)   So does this rule not apply to aluminum electrolytics? Eg will I have no issues replacing an electrolytic 25v 100uf with a 50v 100uf assuming both are low esr, similar footprint and good quailty? Refreshing open attribute table in ArcMap using ArcPy rather than ArcObjects? I am running the Calculate Field GP tool from the arcpy in ArcMap. When a row value is updated, it does not show up untill I use the Reload Cache tool (Table Options > Reload Cache). How do I refresh the attribute table automatically without using ArcObjects?  I have tried updating the definition query as @blah238 suggested , but this doesn't help. Resetting the data source is not an option because the feature class might be in the editing session and I don't want to lose the connection to the source data. How can I check which DNS server am I using (in Linux)? I am using network manager and a wired connection to my university's LAN. (I am trying to find out why my domain doesn't get resolved) What's the fixed size of the suggested edit queue? We know that Stack Overflow has a suggested edit queue, visible to the users who have the  privilege. Someone said the queue has a fixed size.  What's the fixed size of the suggested edit queue?  Is it often that the queue gets filled up and users can no longer suggest edits? What part of speech does here have in the following sentence?     I am here.   I say that in that sentence, here must be an adverb because:    It modifies the verb am by describing where I am. Am is a “being” verb in this instance, not a “linking” verb.   My friend contends that here is a noun because the word here is, in this instance, defined as this place, which in Merriam-Webster is the definition for the noun here. Why didn't (or did) I or some other user get a hat although the requirements were (or weren't) fulfilled? What's up with the scraper sites?