How to use memoir environment to set a motto for a chapter?
"Inspirational" quote at start of chapter
How can momentum but not energy be conserved in an inelastic collision? If that's not possible, then a way to trigger the Dock on the screen with mouse without moving my cursor to the bottom of the screen is also an acceptable solution (I know that the launchpad appears on the screen with Dock)  Also i did see the  about this. All my college years I have been using public, and would like to know the difference between public, private, and protected?  Also what does static do as opposed to having nothing? Where can I download Windows 7 (legally from Microsoft)? I just bought a serial for Windows 7 on-line from the Microsoft store (the most painful shopping experience EVER!). I selected that I wanted to download my version of Windows 7 after purchase. After payment, I have listed a Product Key but no download link in sight.   Where do I download my Windows 7 ISO to burn to disk?  Note: I'm not a Technet or MSDN subscriber. Is there a word that means "a span of six months"? That is, I want to connote a stretch of time that lasts half a year, not an event that happens every six months. What's the use of a decoupling capacitor near a reservoir capacitor? I've seen some circuits where a decoupling capacitor is used as well as a reservoir capacitor, like this (C4 and C5):    I've read about  and for me it looks as if they are meant to remove small fluctuations in the supply voltage. Then I thought - wasn't that the purpose of a  as well? Why wouldn't the reservoir capacitor be able to filter out the small fluctuations, if it is able to filter out the large fluctuations?  So I feel like I have a basic misunderstanding here. What is the purpose of a decoupling capacitor next to a reservoir capacitor, when we assume we place both equally near to the power consuming part? Or is the only advantage of the decoupling capacitor that it is smaller and can therefore be easily placed more near to the power consuming part? Why doesn't the Moon fall onto the Earth? For that matter, why doesn't anything rotating a larger body ever fall onto the larger body? Is there a VB.NET equivalent for C#'s '??' operator? Is there a VB.NET equivalent for C#'s ?? operator? As Scott Myers wrote, you can take advantage of a relaxation in C++'s type-system to declare clone() to return a pointer to the actual type being declared:  class Base {     virtual Base* clone() const = 0; };  class Derived : public Base {     virtual Derived* clone() const };   The compiler detects that clone() returns an pointer to the type of the object, and allows Derived to override it to return a pointer to derived.  It would desirable to have clone() return a smart pointer that implies transfer of ownership semantics, like the following:  class Base {    virtual std::auto_ptr&lt;Base&gt; clone() const = 0; };  class Derived : public Base {     virtual std::auto_ptr&lt;Derived&gt; clone() const; };   Unfortunately, the relaxation of the conventions does not apply to templated smart pointers, and the compiler will not allow the override.  So, it seems I am left with two options:   Have clone() return a "dumb" pointer, and document that clients are responsible for disposing of it. Have clone() return a smart base pointer, and have clients use dynamic_cast to save them to a Derived pointer if they need it.   Is one of these approaches preferred?  Or is there a way for me to eat my transfer of ownership semantics and have my strong type safety too? Comparison of backup tools If $\sum_{n=1}^{\infty} a_n$ converges, then so does $\sum_{n=1}^{\infty} a_n^{\frac{n}{n+1}}$ Given a positive sequence $(a_n)$. Prove that if $\displaystyle \sum_{n=1}^{\infty} a_n$ converges, then so does $\displaystyle \sum_{n=1}^{\infty} a_n^{\frac{n}{n+1}}$.   I tried to use the root test, and I was stuck with the case $\lim \sup \sqrt[n]{a_n}=1$. Maybe we need some trick here.  Thanks so much. What is Skynet's ultimate goal after defeating the resistance? What is the safest way to clean up /boot partition? I have 200 MB assigned for the /boot partition.  Whenever I try to update the kernel, I receive an error message that basically states /boot is full.  What can I do to cleanup /boot and remove/backup the older kernels? What does negative R-squared mean? Let's say I have some data, and then I fit the data with a model (a non-linear regression). Then I calculate the R-squared ($R^2$).  When R-squared is negative, what does that mean? Does that mean my model is bad? I know the range of $R^2$ can be [-1,1]. When $R^2$ is 0, what does that mean as well? Normalizing point cloud data How I can get Digital Height Model (only object heights, DSM - DTM = DHM)?  Many applications can do this, but they convert it to GRID or TIN format. I was wondering if it was possible to keep the data as point clouds. VMware Linux Server -- how can you tell if you are a vm or real hardware? An interesting question.  I have logged into a Linux (most likely SuSE) host.  Is there some way that I can tell programmatically that I am a VM host or not?    Also assume that the vmtools are not installed. Looking for illustrator script to swap all objects with another I have a map with small circles for over 200 cities. I need to change all of the circles into map pins. Is there a way to do this? I think it's a script maybe.   I know how to select all objects of the same appearance and give them a new graphic style but that will only let me change the color, stroke, etc. not replace with a new shape. Update from 14.04 to 16.04 failed with GPG error I would like to install  chat platform on my Ubuntu 12.04 LTS system. Please, could anyone provide me the steps to successfully install this software?. I've been trying to install this software using wine but I couldn't succeed it. Uncertainty principle and multiple observers My understanding is that an observer can measure the precise location of a particle so long as the corresponding uncertainty in momentum measurement is not an issue and vice-versa.    Say there is such an observer, interested in the precise position of a particular particle.  Now, consider a second, independent observer, unbeknownst to the first, who is trying to measure the exact momentum of the same particle without caring about the position.  As a thought experiment, we assume that the two observers are somehow able to access the same particle at the same time in some way without being aware of each other.  Can both observers get their desired results?