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Visualizzazione dei post da Novembre, 2015

Alcuni misteri di Leonardo da Vinci.

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Alcuni misteri di Leonardo da Vinci.
Questi scritti non sono miei, visto che sono un grandissimo appassionato del grande Leonardo, ancora oggi non smetto di meravigliarmi e allo stesso tempo di incuriosirmi.


I quadri di Leonardo da Vinci tornano a far discutere. Questa volta però la «scoperta» di un codice nascosto all'intern della Vergine delle roccie ha l'avvallo del mondo accademico: la rivelazione infatti non si trova in un bestseller, ma in una tesi di laurea. «In quel dipinto Leonardo ha nascosto immagini eretiche e io l'ho dimostrato della mia tesi, discussa presso l'Università della Basilicata» sostiene il trentunenne Luca Caricato. Cos'è che avrebbe dimostrato, lasciando a bocca aperta i relatori? Per esempio che sovrapponendo il quadro originale con la sua copia «rovesciata» assume un senso la strana posizione della mano sinistra di Maria (si poggia sul capo di un bambino). E che però, nello stesso tempo, da panneggio asimmetrico sul grembo della Madonna …

Isaac Newton.

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Isaac Newton.
English physicist and mathematician Sir Isaac Newton, most famous for his law of gravitation, was instrumental in the scientific revolution of the 17th century.
IN THESE GROUPS

—Isaac Newton

Born on January 4, 1643, in Woolsthorpe, England, Isaac Newton was an established physicist and mathematician, and is credited as one of the great minds of the 17th century Scientific Revolution. With discoveries in optics, motion and mathematics, Newton developed the principles of modern physics. In 1687, he published his most acclaimed work, Philosophiae Naturalis Principia Mathematica (Mathematical Principles of Natural Philosophy), which has been called the single most influential book on physics. Newton died in London on March 31, 1727.

Early Life

On January 4, 1643, Isaac Newton was born in the hamlet of Woolsthorpe, Lincolnshire, England (using the "old" Julien calendar, Newton's birth date is sometimes displayed as December 25, 1642). He was the only son of a p…

Botticelli.

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Botticelli.
Adoration of the Magi to the baby Jesus.


Botticelli.
Adorazione dei magi al bambino Gesù.


Leonardo da Vinci.

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Leonardo da Vinci. 15. April 1452 – 2. Mai 1519.


Biography.
Leonardo da Vinci was born in 1452, in the heart of the Renaissance in the heart of Europe. He was born outside Vinci, which lies high up on Mount Albano, in the valley of the Arno River, near the city of Florence. Florence was an independent republic and commercial center at the time of his birth. He was the son of Ser Pierro da Vinci, who was a legal specialist, and a peasant girl named Caterina. He was considered an “illegitimate” son because they were not married. Right away. His father married into a wealthy family and he went to live with his grandparents. Later he lived with his father’s family and they didn’t conceal his birth and welcomed his addition to the family.

As a child he was very smart and was very quick at arithmetic and music. He learned the lyre and had a wonderful singing voice, and quickly went to further develop his talents with a tutor. At age 17, he went to become an apprentice of painting under the …

exo platform.

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exo platform.
always a great platform Open Source


https://community.exoplatform.com/portal/intranet

Leonardo da Vinci.

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Leonardo da Vinci.
Leonardo da Vinci (15 April 1452 – 2 May 1519) was an Italian man who lived in the time of the Renaissance. He was good at lots of things, but was most famous as a painter.He also was a scientist, mathematician, engineer, inventor, anatomist, sculptor, architect, botanist, musician, and a writer. Leonardo was curious about everything in nature. He wanted to know how everything worked. He was very good at studying, designing and making all sorts of interesting things.

Many people think that Leonardo was one of the greatest painters of all time. Other people think that he was the most talented person ever to have lived.The art historian Helen Gardner said that no-one has ever been quite like him because he was interested in so many things that he seems to have had the mind of a giant, and yet what he was like as a person is still a mystery.

Leonardo was born at Vinci which is a small town near Florence, Italy. He was trained to be an artist by the sculptor and painte…

Tuscany Italy.

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Tuscany Italy.
Pisa Cathedral interior.


SUSE – “Will not diverge from its Open Source roots!”

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SUSE – “Will not diverge from its Open Source roots!”
No one had a busier LinuxCon show than the folks at SUSE. Yet still they were gracious enough, and care enough about the community, to sit down for a talk with Linux Journal. We had the distinct pleasure of sitting down for a few minutes during LinuxCon with Michael Miller, SUSE’s VP of Global Alliances and Marketing, to talk about their announcements, their future and the future of Linux, SUSE had a major announcement at LinuxCon: SUSE Linux Enterprise Server is the first and currently only server operating system supported by the recently announced KVM for IBM z Systems, open source-based server virtualization for the IBM mainframe. The announcement coincided with IBM's launch of LinuxONE, a new portfolio of Linux systems based on the z Systems mainframe: The LinuxONE Emperor, a mighty, muscular machine aimed at large enterprise and the LinuxONE Rockhopper, a more entry-level machine aimed at emerging markets that need mainf…

Titian. [ Italy ]

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Titian.     [ Italy ]
Baptism of Christ.


Tiziano.
Battesimo di Cristo.

Botticelli. Italy

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Botticelli. Spring, Italy, a masterpiece given by a great artist.


Botticelli. La Primavera, Italia, un capolavoro regalato da un grande artista.


Siena Tuscany.

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Siena Tuscany. The Good Government, opera unforgettable, another marvel Italian.


Siena Toscana. Il Buon Governo, opera indimenticabile, altra meraviglia Italiana.


BitTorrentSync: Dropbox for Nerds.

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BitTorrentSync: Dropbox for Nerds.
It's not really fair to compare Dropbox directly with BitTorrentSync. First of all, my title implies Dropbox is somehow inferior. To be honest, I haven't found anything that works as smoothly as Dropbox when it comes to sync reliability and ease of installation. That said, although it has incredible strengths, it also has a few shortcomings. One, it's not free, and if you have a lot of data, it can be expensive. Two, your data is stored on the Dropbox servers. The second one is a showstopper for many folk

BitTorrent Sync.
BitTorrentSync uses the BitTorrent protocol to keep multiple locations in sync. Everything is stored on your own machines, and you're limited only by your own storage limitations. The basic features of BitTorrentSync are free, but like Dropbox, there is a paid version. For me, quantity of storage is the most important feature with a syncing app, and with BitTorrentSync, that's unlimited. If you've been in th…

Linux and the Internet of Things.

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Linux and the Internet of Things.
I wake up in the middle of the night, mouth parched and vision blurry, and fumble around to find my iPhone. I press my thumb to the fingerprint scanner, and in the dim blue light, just out of instinct, I squint at the screen, find the right app, open it, and check the ambient temperature and air quality indoors. It turns out my goose bumps are lying; the temperature is quite comfortable and not arctic-level freezing, which is how it feels to me. Now, I touch a virtual switch, and warm yellow light illuminates my way to the kitchen. I slowly waddle towards the water bottle without stumbling over one of my cats, have a drink, and safely waddle back to bed. Another tap on my app screen, and the light fades away; I sleep. This is my reality, and an increasingly common one in many people's homes. The only difference? My tech is mostly self-made—with few exceptions, of course. Our homes slowly but surely fill up with small, smart gadgets that make our …

La Pity by Michelangelo

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La pietà di Michelangelo .
Mai tanta commozione fu provata dal grande artista nel realizzare la sua opera, lo sguardo della vergine nel vedere il figlio morto.

La Pity by Michelangelo.
Why so much emotion was proven by the great artist in creating his work, the look of the virgin in seeing her dead son.



St. Francis.

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St. Francis.
His belief, love, fidelity to the whole of creation, this was St. Francis.

Il suo credo, amore, fedeltà per tutto il creato, questo era san francesco



Native Americans.

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Native Americans.
I love this great people, wisdom and culture in their hearts.

Django Models.

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Django Models.
In my last article, I continued looking at the Django Web framework, showing how you can create and modify models. As you saw, Django expects you to describe your models using Python code. The model description is then transformed into SQL and compared with any previous version of the model that might have existed. Django then creates a "migration", a file that describes how you can move from one version of the model definition to the next. A migration is a fantastic tool, one that allows developers to move their database forward (and backward) in defined chunks. Migrations make it easier to collaborate with others and upgrade existing applications. The thing is, migrations have little or nothing to do with the day-to-day application that you want to run. They are useful for the creation and maintenance of your application's models, but in your application, you're going to want to use the models themselves. So in this article, I look at Django's O…

Una grande mente:Leonardo da Vinci.

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Una grande mente:Leonardo da Vinci.

LEONARDOMa chi era Leonardo da Vinci?

1452  Nasce il 15 Aprile ad Anchiano, piccolo paese vicino Firenze, figlio illegittimo di Notaro Ser Piero e Caterina, donna di umili origini.
1466 Si trasferisce a Firenze con il padre.
1469 Entra come apprendista nella bottega dell’illustre pittore Verrocchio.
1471  Collabora alla realizzazione dell’angelo sulla sinistra, nel dipinto “Il Battesimo di Cristo” del Verrocchio.
1472 E’ iscritto alla Compagnia dei pittori di San Luca, inizia la sua carriera artistica autonoma.
1481 Lavora alla pala d’altare “Adorazione dei Magi”, presso la Chiesa di San Donato a Scopeto, lavoro che resterà incompiuto.
1482 Viene assunto presso la Signoria di Milano dal Duca Ludovico il Moro. Si impegna in studi di ingegneria e architettura, dipinge e disegna.
1489 Studia per la  realizzazione del monumentale “Statua  equestre”. Viene realizzato solo il modello in cotto, poi distrutto dai francesi con l’invasione di Milano nel 1499.
1490 Re…

Strengthening Diffie-Hellman in SSH and TLS.

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Strengthening Diffie-Hellman in SSH and TLS.
Conjecture on cracked primes for the Diffie-Hellman asymmetric algorithm is in recent news, suggesting that several nations have broken primes in common use and can read all traffic: http://www.theregister.co.uk/2015/10/19/nsa_crypto_breaking_theory/

https://freedom-to-tinker.com/blog/haldermanheninger/how-is-nsa-breaking-so-much-crypto/
To protect ssh, edit the file /etc/ssh/moduli and comment lines where the 5th field is less than 2047: # $OpenBSD: moduli,v 1.8 2012/08/29 05:06:54 dtucker Exp $ # Time Type Tests Tries Size Generator Modulus #20120821044040 2 6 100 1023 5 D9277DAA27DB131C03B108D41A76B4DA8ACEECCCAE73D2E48CEDAAA70B09EF9F04FB020DCF36C51B8E485B26FABE0337E24232BE4F4E693548310244937433FB1A5758195DC73B84ADEF8237472C46747D79DC0A2CF8A57CE8DBD8F466A20F8551E7B1B824B2E4987A8816D9BC0741C2798F3EBAD3ADEBCC78FCE6A770E2EC9F … #20120821044502 2 6 100 1535 5 D1391174233D315398FE2830AC6B2B66BCCD01B0A634899F339B7879F1DB85712E9DC4E4B1C6C83555…

IBM LinuxONE Provides New Options for Linux Deployment.

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IBM LinuxONE Provides New Options for Linux Deployment.


In August 2015, IBM announced LinuxONE (www-03.ibm.com/press/us/en/pressrelease/47474.wss), anchored by two new Linux mainframe servers that capitalize on best-of-class mainframe security and performance, and that bring these strengths to open-source-based technologies and the Open Source community. The move creates greater choice for Linux applications in enterprises where IT is under constant pressure to provide breakthrough systems in areas where the IBM z System mainframe excels, such as analytics and hybrid clouds. The two new LinuxONE mainframe servers are the entry-level, single-frame Rockhopper server, and the high-end, double-frame Emperor server. They both offer flexible pricing models and economy of scale. Rockhopper and Emperor also support an expanded set of open-source and industry tools and software, including Apache Spark, Node.js, MongoDB, MariaDB, PostgreSQL, Chef and Coker. This will provide clients with choice a…