Tag Archive for 'wikipedia'

ISBN-10 and ISBN-13 (EAN) validation with PHP

Since the begining of this year the standart ISBN has now 13 numbers instead of 10 so, I did some functions for validating the ISBN-10 and EAN (works for ISBN-13) with PHP, maybe it’s useful for someone.

Continue reading ‘ISBN-10 and ISBN-13 (EAN) validation with PHP’

I’m back from Lisbon!

Hello there, I’m finally home! I’m kinda tired from the train trip but hopefully my bed will give me my deserved rest tonight…

The Rolling Stones - A Bigger Band Concert at Alvalade (Lisbon)

Continue reading ‘I’m back from Lisbon!’

Why is Jimbo Wales smiling?

I’ve scanned this nice article about Jimbo Wales (the founder of Wikipedia) I read on ExecutiveDigest today (sorry, only Portuguese).

Jimbo Wales Smiling

Jimbo Wales Smiling

Continue reading ‘Why is Jimbo Wales smiling?’

I-Doser - Virtual Drug Doses

I was looking up at the ceiling eyes wide open, seeing greens and purples, swirling and condensing to black. - Elissa

I’m at this moment trying I-Doser with the LSD dose, this is amazing: at 78% I hear cruise ships playing their horns or a cat crying out loud, I can’t really figure it out.

Electroencephalography

Continue reading ‘I-Doser - Virtual Drug Doses’

Mersenne Primes - Discovering Mammoth Primes

Prime numbers have always been a central point of mathematical studies as they yield (at least for now) lots of stuff that we don’t understand (like factoring and it’s distribution among natural numbers - read the Wikipedia link bellow if you want to find out more). Prime numbers also play a big role paper in our world, as strange as it seems, our unability to fully understand primes is the basis of our digital security as we know it today. Finding new prime numbers nowadays is a task that no longer can be done by humans (as far as I’m aware of) and a computer takes at least a couple of days to find a new one.

Continue reading ‘Mersenne Primes - Discovering Mammoth Primes’