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Pedro Larroy
Worked at Nokia
Attended universitat politècnica de catalunya
Lived in Sabiñanigo
108 followers|66,467 views


I recently spent 16 hours on a plane and went halfway across the globe. It's amazing that our planet has become so small, it also made me think how fragile our planet is, and how much does it suck to be 16 hours inside a can. I wouldn't like to be 8 months in a trip to Mars. Much less be born and die in a trip to another solar system.
A multigenerational journey between stars would require a <em>lot</em> more passengers than scientists previously thought.
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Pedro Larroy

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A Wooden Trammel of Archimedes

The gif is a concept (working) based on trammel of Archimedes. I'm not so sure if it fit the definition because as it's said "It consists of two shuttles which are confined ("trammelled") to perpendicular channels or rails...." as given on Wikipedia.

A trammel of Archimedes is a mechanism that traces out an ellipse. It consists of two shuttles which are confined ("trammelled") to perpendicular channels or rails, and a rod which is attached to the shuttles by pivots at fixed positions along the rod. As the shuttles move back and forth, each along its channel, the end of the rod moves in an elliptical path. The semi-axes a and b of the ellipse are the distances between the end of the rod and the two pivots. An ellipsograph is a trammel of Archimedes intended to draw, cut, or machine ellipses, e.g. in wood or other sheet materials. An ellipsograph has the appropriate instrument (pencil, knife, router, etc.) attached to the rod. Usually the distances a and b are adjustable, so that the size and shape of the ellipse can be varied.

The history of such ellipsographs is not certain, but they are believed to date back to Proclus and perhaps even to the time of Archimedes. ~ Wikipedia

An animation of a Trammel of Archimedes in action.
Wooden versions of the trammel of Archimedes have been produced also as toys or novelty items, and sold under the name of nothing grinders or do nothing machines. In these toys the drafting instrument is replaced by a crank handle, and the position of the sliding shuttles is usually fixed.

" The term “Trammel of Archimedes” is a reference to one of the greatest thinkers of antiquity, reflects the fact that drawing ellipses was studied and understood more than 2500 years ago.  Whether or not Archimedes himself invented anything like this specific object, we know that the mathematical concepts surrounding ellipses and drawing ellipses were known at that time. Attaching his famous name to this device may or may not be historically accurate, but it a reasonable evocation of the age and importance of the knowledge it is based on.  " as given in

#maths   #mathematics   #beautiful   #themoreyouknow  
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Pedro Larroy

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先週末、 Google はインターネットの力を使って、皆さん一人ひとりの視点で魅力的だと感じる “日本のカッコイイ” コンテンツを世界に発信できるプロジェクト「COOL JAPAN on Google+」をスタートしました。 (日本語版) (英語版)

こちらは、皆さんが Google+ で #cooljapan というハッシュタグをつけて投稿していただいた写真などのコンテンツを集め、世界中の人にまとめて見ていただけるサイトです。

また、このプロジェクトは経済産業省クリエイティブ産業課が「クールジャパン」政策の一環として手がける、東京をはじめ日本でしか見られないデザイン・ファッション・アートなどを世界中の人々に紹介していくサイト 「100 Tokyo」と連動しています。

「COOL JAPAN on Google+」に集まった投稿の中でも、 #100Tokyo  というハッシュタグが付けられた特に素晴らしいコンテンツは、「100 TOKYO」のサイトでも紹介されます。

日本のクールなコンテンツを、Google+ を通じて自分たちで世界に向けて発信できるチャンスです。ぜひ、みなさんが発掘した“カッコイイ日本”を投稿してみてください。
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Pedro Larroy

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Are you getting enough sleep?  Not getting enough sleep can raise levels of Cortisol, a stress hormone in your body.  Elevated levels of Cortisol can lead to negative effects on your body, such as collagen loss in the skin (making you look older), elevated blood pressure and increased protein breakdown, which makes it harder to build and maintain muscle mass.
#fitness   #sleep   #health  
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Pedro Larroy

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#dash_berlin #music  

relax time :)

Dash Berlin feat. Emma Hewitt - Disarm Yourself
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Have them in circles
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Pedro Larroy

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Should Linux distributions support the boycott by pulling Firefox as default browser?
Gay marriage is not a gay issue, nor is it liberal or conservative. It is an equality issue, since basic rights of Americans, who happen to be gay, are threatened. As more and more people wake up from the slumber of ignorance and see the light in supporting gay marriage, there are still people that refuse to evolve. You can hate anyone you want, and if you hate gay people, that hate is your burden to live with. Quite frankly, gay people do not ne...
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Pedro Larroy

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Qt 5.3 Beta was released, they said.
With WinRT support, they said.

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You know you are seriously fucked when you are sentenced to death and the veredict goes to "supereme religious authority" for approval or rejection. Seems we didn't come so far from 2000 years ago stoning people because they said something improper about the spaghetti monster.

A religious scholar deciding about justice is worse than having a plumber or the mailman doing so. So far we have come with the arab spring.

I want to leave this planet now.

#egypt #humanrights #news  
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Damn bug, can you spot it? 

710│         bool changed = false;
711│         if (scan_file.mtime != mfile->mtime || scan_file.size != mfile->size);
712│         {
713│             mfile->to_checksum = true;
714├>            changed = true;
715│         }

(gdb) p mfile->mtime
$61 = "2014-03-23T23:30:32Z"
(gdb) p scan_file.mtime
$62 = "2014-03-23T23:30:32Z"
(gdb) p scan_file.size
$65 = 14
(gdb) p mfile->size
$66 = 14
(gdb) wtf?
Undefined command: "wtf".  Try "help".

Hint: last character of line 711

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Have them in circles
108 people
Vladimir Petrović's profile photo
Damjan Čretnik's profile photo
Manuel HERNANDEZ GASSET's profile photo
Carlos Vidal's profile photo
Roberto Camarero's profile photo
Manuel Molina Cuberos's profile photo
I work on Nokia Maps, the leader in mobile navigation
  • Nokia
    Sr Engineer
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Sabiñanigo - Huesca - Wicklow - Florida - Boston - Barcelona - Berlin - Jaca
Contributor to
Good food, good music, good people, good code, rock and roll baby!
  • universitat politècnica de catalunya
    masters of telecommunication engineering
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Pedro Larroy's +1's are the things they like, agree with, or want to recommend.

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