There are some convenient formulas for the summation of the first $n$ integers which are the $a$th powers of other integers, e.g. $$ \sum_{i=0}^n i = \frac {n(n+1)}2$$ $$ \sum_{i=0}^n i^2 = \frac {n(n + 1)(2n + 1)}6 $$ Similarly, there are formulae for integration of monomials ($ x^n $), such a...

I was wondering which you'd expect to wear faster: wheel rims or brake blocks. The reason I ask is that my mileage has shot up the last couple of years so I'm seeing a lot of wear on things I never knew could wear. I'm told that chain, cassete and front chain rings should generally be replaced ...

I redirected my subdomain blog.qmery.com to blog.borhancid.com. When I dig it it's show right DNS (shows DNS server of borhancid) but when I want to access it by browser it's redirected to default HTTP page of my host. I can't figure out where is problem? Problem rises from qmery.com host or bor...

Are 'Guardians of the Galaxy', 'Fantastic Four' and 'Avengers' movies set in the same timeline?

Back then in ~2011/2012 it was pretty usual to use MCEdit to transfer objects into other worlds. Can you still use this tool? I remember some issues, if you hadn't updated it to the current version of Minecraft, but I saw that the last update of MCEdit was in 2013. My last world fucked up after ...

An EM wave, amplitude $E_0$, frequency $\omega_0$, is incident upon a material with relative permittivity (dielectric function) $$\varepsilon \left( z \right) = \left\{ \begin{gathered}{\varepsilon _0},z < 0 \\{\varepsilon _1},z \geqslant 0 \\ \end{gathered} \right.$$ $\varepsilon _0$ and $\va...

Is there a way to expand the list of birthdays on Facebook? I use to notice people's birthdays because their names and birthday were listed. Facebook has moved the list up the page, condensed it, and only shows today's birthdays. Is there any way to at least show upcoming birthdays and the person...

Is it decidable whether a computable analytic function $f(x_1,x_2,\dots,x_n)$ over $\mathbb{R}$, $\mathbb{C}$ in a semi-algebraic or semi-analytic domain is identically zero? Is there any algorithm? Also, I am wondering under what condition regarding the domain of the function, can it be decida...

I have an internally published ArcGIS webmap. The Rest's Level Of Detail (LOD) reports a different number to the WMTS capabilities XML. I checked out a few public services, and found the exact same thing.. Why are these numbers different. What am I missing? REST MapServer: USGS Topo MapSer...

I would like to add a class to the following <p> tag: <p class="form-row form-row-wide"> <input class="input-checkbox GR_checkoutbox" value="1" id="gr_checkout_checkbox" type="checkbox" name="gr_checkout_checkbox" <?php if ($checked) {?>checked="checked"<?php }?> /> <labe...

There are at minimum 12 manufactures currently producing and selling systems identical to what Ortery Technologies, Inc. has listed in its claims (US20070172216). There are current systems on the market from multiple vendors that employ serial, USB and wireless communications between PC and camer...

I'm on mavericks and I am trying to delete a partition of an external hard drive. This is its schema Partition1: 50GB "MavericksBackup": Bootable backup Partition2: 187GB "Home Data": Absolutely Empty Partition3: 12GB "Install OS X Mavericks": it contains only the bootable app to install Maver...

I have about 15 series in my chart and do not wish to manually select and edit each one individually to give it a distinct marker Is there a way to do this for all lines in one go? I don't care if the shape/type of marker is randomly assigned as long as they look different

Hello I created a form in infopath and when i go to load it up via sharepoints front end I get this error message "A query to retrieve form data cannot be completed because this action would violate cross-domain restrictions. " Now contrary to what it says, Cross domain is enabled for infopat...

I'm trying to use the 3D software Blender in Ubuntu and the software is very keyboard shortcut heavy. The issue is, a lot of the keyboard shortcuts overlap with Ubuntu's system shortcuts. For example, alt+rightClick is a shortcut in Blender. However, Ubuntu overrides and displays a menu which all...

I have a chinese Note 3. It doesn't have play store which defeats everything that made samsung dominate the smartphone space. I can't download GMail; I am stuck with a browser that uses baidu for search; there is no facebook and twitter. It could almost be just one big feature phone outside China...

UPDATE Stacksguru address is now stacksguru@appspot.com (in the plural form) remove the old contact (stackguru@appspot.com) and use the new one. StacksGuru is a Jabber/XMPP bot which gives you a command line interface to Stack Apps sites, including Stack Overflow, Server Fault and Super User...

Difference in differences has long been popular as a non-experimental tool, especially in economics. Can somebody please provide a clear and non-technical answer to the following questions about difference-in-differences. What is a difference-in-difference estimator? Why is a difference-in-diffe...