Il moderno elaboratore e il sistema binario L’elaboratore moderno viene definito come un sistema elettronico digitale programmabile: sistema: costituito da componenti (input, output, memoria, scheda madre, processore, …) che interagiscono in modo organico tra loro; elettronico digitale: sfrutta componenti elettronici digitali come i transistor; programmabile: il comportamento del sistema è flessibile e specificato mediante un programma, ossia un insieme sequenziale di istruzioni finite ed univocamente interpretabili codificate in un determinato linguaggio di programmazione. Le componenti di un elaboratore moderno si dividono in cinque categorie: dispositivi di input; dispositivi di output; memoria; unità di elaborazione dati (ALU); unità di controllo. Le ultime due componenti sono raggruppate in un’unica componente detta processore. Il processore, realizzato con milioni di piccoli componenti elementari (transistor), è considerato il cuore di un elaboratore elettronico. Al...
James Joyce was born in 1882 in Dublin into a middle class Catholic family. His father was a supporter of Charles Parnell, the leader of the movement for Home Rule for Ireland (to learn more about “the free State of Ireland” go to the end of this post). Joyce attended two Jesuit schools, then went on to study modern languages at University College in Dublin, where he graduated. Finding life in Ireland an obstacle to his own artistic development, in 1902 Joyce left Ireland in voluntary exile, living first in Paris, then to Pola in 1904 and, finally, in Trieste, where he wrote “Dubliners” and “A Portrait of the artist as a young man”. When World War I broke out, Joyce went to Zurich where he started working on “Ulysses”. In 1920 he moved to Paris where “Ulysses” was published and Joyce wrote his last novel “Finnegans Wake”. When France was occupied by the Germans in 1940, Joyce returned to Zurich, where he died in 1941. All of Joyce’s works are centred on Ireland and on the early 20th-c...