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Pedro Larroy
Worked at Nokia
Attended universitat politècnica de catalunya
Lived in Sabiñanigo
110 followers|72,684 views
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I saw this building on documentaries many times. Today I was there and was close to crying three times. It's a very emotive place and made me think how tragic is that we still have wars and armed conflicts in the world. Including those in the name of freedom. #hiroshima #peace
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Pedro Larroy

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He had a ritual of saluting every green light and pointing to the schedule. Things are taken very seriously in J. ‪#‎trains‬
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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.

http://www.popularmechanics.com/science/space/deep/how-many-people-does-it-take-to-colonize-another-star-system-16654747
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.

http://en.wikipedia.org/wiki/Trammel_of_Archimedes

" 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 
http://robertmcgrath.files.wordpress.com/2013/07/making_a_trammel_of_archimedes1.pdf

#maths   #mathematics   #beautiful   #themoreyouknow  
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Have them in circles
110 people
Manuel HERNANDEZ GASSET's profile photo
Regis Desgroppes's profile photo
Juan Vidal's profile photo

Pedro Larroy

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Cruising at high speed
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In they todai-ji temple in Nara
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People
Have them in circles
110 people
Manuel HERNANDEZ GASSET's profile photo
Regis Desgroppes's profile photo
Juan Vidal's profile photo
Work
Occupation
I work on Nokia Maps, the leader in mobile navigation
Employment
  • Nokia
    Sr Engineer
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Previously
Sabiñanigo - Huesca - Wicklow - Florida - Boston - Barcelona - Berlin - Jaca
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Good food, good music, good people, good code, rock and roll baby!
Education
  • 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.
Telegram
market.android.com

Telegram es una aplicación de mensajería enfocada en la velocidad y la seguridad. Es súper rápida, simple y gratuita. Con Telegram, puedes c

Truck Parking 3D
market.android.com

Truck Parking 3D is a truck simulator with realistic controls and great dynamic gameplay.This game is exactly precision driving simulator. C

Process Explorer
technet.microsoft.com

Process Explorer, also known as procexp.exe, shows you information about which handles and DLLs processes have opened or loaded.

PowerDNS - PowerDNS
www.powerdns.com

PowerDNS, high performance nameserver

Advanced Queries - MongoDB
www.mongodb.org

Check for existence (or lack thereof) of a field. db.things.find( { a : { $exists : true } } ); // return object if a is present db.things.f

SCons User Guide 2.1.0
www.scons.org

Table of Contents: Preface. 1. SCons Principles: 2. A Caveat About This Guide&#39;s Completeness: 3. Acknowledgements: 4. Contact. 1. Buildi

The Boost Graph Library - Boost 1.47.0
www.boost.org

Boost C++ Libraries Boost C++ Libraries ...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb S

Your Future Husband
www.youtube.com

LIKE us on Facebook: http://facebook.com/humordy FOLLOW us on Twitter: http://twitter.com/humordy "Are you ready to meet your soulmate?" Che

[Quick Look] Network Spoofer – Wreak Havoc On Unsuspecting Wi-Fi Users W...
www.androidpolice.com

For those tired of strangers latching on to their unprotected Wi-Fi network, or simply looking to have a little fun at the expense of others

chromeTouch « Google Chrome Extensions
www.chromeextensions.org

Your Account. Login. Register | Login. All Categories, Alerts &amp; Updates, Appearance &amp; Functioning, Games, Language &amp; Translators

Early ARM 64-bit prototype servers could come by year's end | PCWorld
www.pcworld.com

Early prototype 64-bit ARM servers could be available for testing purposes by the end of this year or possibly at the latest by the middle o

Radeon mobility HD 4500 acceleration and XV, Linux. « Pedro Larroy
pedro.larroy.com

Very telegraphically: 01:00.0 VGA compatible controller: ATI Technologies Inc M92 [Mobility Radeon HD 4500/5100 Series]. Setting the followi

SCons: Documentation
www.scons.org

Home; FAQ; Wiki; Contact; Download. Production (2.1.0). Tarball; Zip; Windows; RPM; Source. Development (2.1.0). Tarball; Zip; Windows; RPM;

Aprende el ejercicio SALUDO AL SOL- Curso de Yoga de CCC:
www.youtube.com

Este es el ejercicio dinámico más conocido y practicado en Yoga. Es excelente para comenzar el día, preparando cuerpo y mente para la nueva

GoFastButton - SCons Wiki
www.scons.org

Immutable Page; Comments; Info; Attachments. More Actions: Raw Text, Print View, Delete Cache, ------------------------, Check Spelling, Lik

Python Converted To JavaScript, Executed In-Browser - Slashdot
developers.slashdot.org

lkcl writes "Two independent projects, Skulpt and Pyjamas, are working to bring Python to the web browser (and the JavaScript command-line)

Detienen a un vasco que vendía piedras a Irán
www.elmundotoday.com

Jon Jairo Artetxe, de 56 años, ha sido interceptado esta mañana en la carretera Asua-Erletxes (N-367), en la provincia de Vizcaya, mientras

Great Wagyu beef for lunch at a reasonable price. Luxury atmosphere.
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