At what age should parents stop showering/bathing with children?
When should parents stop changing clothes in front of children?
What is the closed form of $\int e^{x^2} \, dx$? How can I do a closed form expansion of $\int e^{x^2} \, dx$? Please be specific as to which method I must use. Student t as mixture of gaussian Using the student t-distribution with $k &gt; 0$ degrees of freedom, location parameter $l$ and scale parameter $s$ having density  $$\frac{\Gamma \left(\frac{k+1}{2}\right)}{\Gamma\left(\frac{k}{2}\sqrt{k \pi s^2}\right)} \left\{ 1 + k^{-1}\left( \frac{x-l}{s}\right)\right\}^{-(k+1)/2},$$  how to show that the Student $t$-distribution can be written as a mixture of Gaussian distributions by letting $X\sim N(\mu,\sigma^2)$, $\tau = 1/\sigma^2\sim\Gamma(\alpha,\beta)$, and integrating the joint density $f(x,\tau|\mu)$ to get the marginal density $f(x|\mu)$? What are the parameters of the resulting $t$-distribution, as functions of $\mu,\alpha,\beta$?  I got lost in calculus by integrating the joint conditional density with the Gamma distribution. What does "restricted \write18 enabled" mean and why does TexLive keep reporting it? How do I restore .bashrc to its default? I've been trying to install Android developer tools on Eclipse, and I followed the information in .  Like the video said, I added the following two lines of code to the .bashrc file:  export PATH=$(PATH):-/android-sdk/tools/ export PATH=$(PATH):-/android-sdk/platform-tools/   It seems, however, that this did not help me to install the Android files on Eclipse, as I am still having problems with that. What's more, it seems that I can't make any command in the terminal without getting a major error now! Every time I try to make a command in the terminal I get the following message:     The command could not be located because '/usr/bin' is not included in   the PATH environment variable.   Is there away to restore .bashrc to its default? Performing test for homogeneity of variance without samples I'd like to perform a test for homogeneity of variance in r, but I don't have samples available to test.    I have the sample mean of each group, the sample deviation of each group, and the sample size of each group(100).  Brand    ybar_i  s_i    n_i --------------------------- LowTar   9.64    .291   100 A        10.22   .478   100 B        10.77   .372   100 C        11.57   .352   100 D        13.59   .469   100   I'm thinking I should use the Levene test from Lawstat package, but that requires samples to test.  Or I think I could use the Fmax test. but that also requires samples. Where are my installed applications? Where can I find information about upcoming special issues in a field of study? How can I find information about upcoming special issues related to a special field of study? There are good websites for upcoming conferences but I could not find any place to search for special issues. Current in wire + moving charge next to wire creates magnetic force in the stationary reference frame OR electric force in the moving reference frame from special relativity due to change in charge density etc.... I think I understand this and I think it's super cool. Now here's the rub...  Current in wire + stationary charge next to wire creates no net charge. This is how nature behaves. I get it. My question is why can't I use the same special relativity logic as above, that is, current in wire cause electrons in wire to contract in accordance with special relativity so there has to be a net charge on the wire, which then acts on stationary charge next to wire.  I have been reading and reading and reading and I have come up with the following:  (1) When electrons in wire get accelerated to create current the distance between them actually expands in accordance with special relativity - something to do with bells spaceship paradox - which I am not going to pretend to understand  (2) This expansion from (1) above is exactly opposite and equal in magnitude to the contraction special relativity then causes and the expansion and contraction cancel out to keep the charge density in the wire constant and therefore no net charge on the wire  Here are my questions:  Is the explanation above correct? If so, please elaborate because i dont understand  If not correct, what is going on?  This is driving me absolutely nuts. using nginx with SNI By now I've not used SNI with nginx yet. But as IP address pools are quite filled and commercial XP support is about to cease (finally) I'm thinking about converting a few sites to SNI.  I'm aware of the general limitations and pitfalls that might come along with SNI (XP issue, very old browsers). But beyond that is there anything I should be aware of?   Like - nginx related pitfalls when using SNI - issues/bugs with recent (notable!) browsers I am looking for a way to convert a long string (from a dump), that represents hex values into a byte array.  I couldn't have phrased it better than the person that posted .  But to keep it original, I'll phrase it my own way: suppose I have a string "00A0BF" that I would like interpreted as the  byte[] {0x00,0xA0,0xBf}   what should I do?  I am a Java novice and ended up using BigInteger and watching out for leading hex zeros. But I think it is ugly and I am sure I am missing something simple. Make font size bigger than max limit of 1296 pt in Adobe Illustrator (2015)? For some reason and for many years there's a limit for font size in Illustrator. It is 1296 points max, so you can't go bigger without converting type to outlines first. Converting to outlines means you will not be able to edit type parameters and text it-self. Don't know how about you, but this makes me sad in non-destructive editing era.  What's your workaround? Where can I find every gnome? iPhone 5S, LTE does not work Is this sentence acceptable?     You’re welcome, have a nice day ahead. Seems like this is the most powerful weapon of all: transport your enemy into a bulkhead, planet, etc. Transport your enemy's ship inside a planet, etc.  Is there some technical reason that it can not be used this way? Must I enter Europe with Schengen visa from the country where I applied? If I applied for a Schengen visa from "country A" and I got the visa but I had some commitments in "country B" and I have to finish it before going to Europe should I get back to "country A" to travel to Europe or can I use the visa from any where? Could Dark Matter actually just be spacetime with curvature "leftovers" from the big bang or the inflationary epoch? The  feat (PHB, p. 168) says:     While you are wielding a glaive, halberd, pike, or quarterstaff, other creatures provoke an opportunity attack from you when they enter your reach.   The  feat (PHB, p. 170) says:     When a hostile creature's movement provokes an opportunity attack from you, you can use your reaction to cast a spell at the creature, rather than making an opportunity attack. The spell must have a casting time of 1 action and must target only that creature.   On this very topic, Mearls has :     Q: Do Polearm Master and War Caster combine to allow a magic user to make a spell opportunity attack when they enter reach?   A: No - polearm master applies only if you use the weapons it lists to make the attack     Another question on this very topic:   But since then, we now have spells like  (SCAG, p. 142):     As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise the spell fails. On a hit, the target suffers the attack’s normal effects, and it becomes sheathed in booming energy until the start of your next turn. If the target willingly moves before then, it immediately takes 1d8 thunder damage, and the spell ends.    So, with the addition of booming blade, if I have a quarterstaff + War Caster + Polearm Master, could I use my reaction to cast booming blade if someone steps into my reach? What I am looking for is the equivalent of System.Windows.SystemParameters.WorkArea for the monitor that the window is currently on.  Clarification:  The window in question is WPF, not WinForm. How do I rip audio from a DVD?