Monthly Archives: February 2011

All Your Contacts Are Belong to Us (II)

(BEING CONTINUED FROM  18/10/10) 3.2 Cross-site profile cloningIn the cross-site profile cloning attack, our aim is to identify victims who are registered in one social network, butnot in another. Our first aim, from the attacker’s point of  view, is to … Continue reading

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Η ΑΣΦΑΛΕΙΑ ΣΤΟ ΔΙΑΔΙΚΤΥΟ (a )

    ( ΣΥΝΕΧΙΖΕΤΑΙ ) ΠΗΓΗ  http://www.ntua.gr

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e‐Inclusion initiatives from private and non‐profit European entities (IV)

(CONTINUED FROM   16/10/10 ) 2.8. Initiatives’ impact: measurements and observations The study originally aimed at identifying innovative and impactful e‐Inclusion case studies from the private and no‐profit sector in order to capture the current situation in term of initiatives coming … Continue reading

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Ο ΑΡΙΣΤΑΡΧΟΣ ΚΑΙ ΟΧΙ Ο ΚΟΠΕΡΝΙΚΟΣ

Από την εποχή της εμφάνισης των ελλήνων φιλοσόφων πριν από δυόμισι χιλιετίες στην αρχαία Ιωνία, αρχίζει η επιστημονική επανάσταση. Η επανάσταση συνέβη στην Ιωνία και όχι σε κάποια από τις μεγάλες πόλεις της Ινδίας, της Αιγύπτου, της Βαβυλωνίας, της Κίνας … Continue reading

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The History and Practice of Hellenic Astronomy

  Greek astronomy is the astronomy of those who wrote in the Greek language in classical antiquity i.e. see Aristarchus of Samos Greek astronomer/mathematician and his heliocentric model of the solar system. Greek astronomy is understood to include the ancient … Continue reading

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Μαύρες τρύπες (α) – πλεον συμπαντος και εν τω νωι

Ιστορία Η ιδέα για ένα σώμα τόσο συμπαγές (άρα και με τεράστια βαρύτητα) που ούτεκαν το φως θα μπορούσε να διαφύγει απ’ αυτό ειπώθηκε για πρώτη φορά απτον γεωλόγο John Michell γύρω στο 1783.Το 1796 ο μαθηματικός Pierre-Simon Laplace περιείχε … Continue reading

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BASICS OF RADIO ASTRONOMY-meros H (continued from 08/10/10)

  Planetary Sources and Their Satellites Unlike stars, the radio energy observed from planets and their satellites (except the Jupiter systemand, to a small extent, Saturn) is mostly thermal blackbody radiation. The wavelengths ofradiation observed from these bodies gives us … Continue reading

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