Is there a way to detect if a website uses a a known DDoS protection service (Prolexic for example)?

Is there a way to detect if a website uses a a known DDoS protection
service (Prolexic for example)?

Is there a way to check if a website uses a a known DDoS protection
service (Prolexic for example)?
My first guess was to look at the IP address the website resolves (and see
if it matches the protection service provider) to, but I am not sure that
proves anything.

SQL Azure Automated Backups doesn't work

SQL Azure Automated Backups doesn't work

I configured automated export of my SQL azure db, but backups are not
created. Also, I'am resieved this mail.
Automated SQL Export failed for pgmkixvn6d:aplicensingdb at 25.09.2013
23:06:45. The temporary database copy was made, but this copy could not be
exported to the .bacpac file in storage.
NOTES: We recommend checking that the storage account is available, and
that you can perform a manual export to that account. We will attempt to
export again at the next scheduled time
I tryed to export db manualy in this storage accaunt — it was created
without problems.

Using a big brace over multiple lines - multiple lines left of it – tex.stackexchange.com

Using a big brace over multiple lines - multiple lines left of it –
tex.stackexchange.com

I am super helpless, I wanna do the following: Mathmode, 2 lines on the
left, a brace over both (using array) and than I wanna have 3 lines on the
right. A small example: \begin{align*} \left. ...

Interesing, hard limit with sum, involving $\pi$

Interesing, hard limit with sum, involving $\pi$

Yesterday I was boring so I decided to derive formula for area of circle
with integrals. Very good exercise, I think, because I forgot many, many
things about integrals. So I started with: $$\int_{-r}^{r}
\sqrt{r^2-x^2}dx$$ but I didn't have any clue how to count indefinite
integral $\int\sqrt{r^2-x^2}dx$ (is it even possible? today I only found
method for counting definite integral above with trigonometric
substitution, but this does not apply in general), so I decided to use
Riemann's theorem, since I only need to count definite integral. And
everything was going well, till something extremely interesting happend.
The last step I need to do is to find this limit: $$\lim_{n \to
+\infty}\frac{1}{n}\sum_{k=1}^{n}\sqrt{\frac{k}{n}\cdot\frac{n-k}{n}}$$
Surprisingly it is equal to $\frac{\pi}{8}$, and it is mindblowing ;-) but
I only know that because I know formula for area of circle which I'm
trying to derive. But without knowing it, is it possible to calculate this
limit with relatively simple methods? I really, really want to to this in
order to award my attempts. Can anybody help?

Oracle forms migrated from 10g to 11g

Oracle forms migrated from 10g to 11g

Once exported from oracle 10g to 11g, It is saying some java beans are
missing in the form. Is there something we need to change the FORM beans
path in new version.If not, Where are we mentioning the path for java
beans in reports.

What is the opposite of Regexp.escape?

What is the opposite of Regexp.escape?

What is the opposite of Regexp.escape ?
> Regexp.escape('A & B')
=> "A\\ &\\ B"
> # do something --
=> "A & B"
How can I get the original value?

How can I start Emacs with predefined window?

How can I start Emacs with predefined window?

Is there a way to make my Emacs start with predefined frame as my attached
screenshot? I am not familiar enough how to do it in my .emacs script...

It is as simple as doing :
split-window-horizontally (create two window side by side)
split-window-vertically (split the first window in the left into two part).
And in the last window, I want it to upload a calendar. I make this
arrangement mostly because my monitor have a broken LCD in the left part
of it. So my code must be in the right side of the screen :)