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Tuesday, November 19, 2013

The History of The Internet

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The Internet is a global system which serves billions of users worldwide, containing millions of smaller domestic, academic, business and governmental networks, which present all kinds of information and services, such as e-mail, online chat, file transfer and the inter-linked web pages and documents of the World Wide Web, abbreviated in the famous WWW.
A landmark in its evolution is at the end of the 20th century, when it began the first era in which the people who own a website can have a means of exposure on a scale comparable to mass media’s.
The rest of the history of the Internet is full of stodgy technical terms on which it’s not important to focus on now, as for the moment I suppose it’s enough to know that the whole story started in the late ‘60’s, with the purpose of serving the US’ army.

Friday, November 15, 2013

Efectele poluarii apelor

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Consecintele aduse de poluarea apelor se resimt la sute de mii de km distanta fata de apele curgatoare in care s-au deversat agentii poluanti, astfel incat, in final, substantele poluante ajung in mari si oceane, unde produc efecte cu adevarat devastatoare. Unul dintre cele mai obisnuite si des intalnite efecte ale poluarii apelor este vegetatia verde de la suprafata apei. Din cauza acestui gros strat verde, razele soarelui nu mai pot patrunde spre straturile din adancuri, deci plantele acvatice care produc oxigenul necesar vietuitoarelor din apa nu le mai pot sustine pe acestea in viata. In plus, anumite specii de alge albastre produc substante toxice care omoara pestii si cauzeaza interzicerea activitatilor de agrement pe lacuri, in lunile de vara.
In afara faptului ca vietuitoarele acvatice mor, un efect deosebit de grav este eutrofizarea lacurilor, numita si "moartea" acestora, ce consta in faptul ca, incetul cu incetul, lacul se ingusteaza si dispare.
De fapt, nocivitatea poluarii apei cauzeaza, direct sau indirect, omului si de aceea este esentiala cunoasterea problemei in amanunt de catre fiecare dintre noi.

The History of Television (TV)

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Television (mainly abbreviated as “TV”) is a telecommunication medium, a bidirectional path for moving images that can be monochrome or coloured with optional accompanying sound.
The first TV was invented in 1884 by the German student Paul Nipkow and in 1925, John Baird, a Scottish inventor, succeeded in transmitting moving silhouette images through Nipkow’s machine. It had 30 lines resolution. In 1926 it appeared one with 40 lines resolution, in 1927 one with 100 lines resolution and so on. In 1940, it had started to be developed the coloured TV transmission.
The television has been improving since then and nowadays it’s completely different, as trying to compare Nipkow’s TV with the actual Smart TV, so we have to notice the incredibly fast evolution. In only one century we came to this.

Thursday, November 14, 2013

"Praslea cel voinic si merele de aur", de Petre Ispirescu - rezumat

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    Un imparat avea in gradina sa un mar ce facea mere de aur, pe care el nu reusise sa le guste niciodata pentru ca in fiecare an acestea erau furate. Numerosi viteji, inclusiv cei mai mari doi fii ai imparatului, incercasera sa prinda hotul, dar zadarnic. Cu toate acestea, intr-o zi, Praslea, mezinul familiei, a decis sa incerce si el.
    Acesta a fost primul ce a izbutit sa raneasca zmeul hot cu o sageata si sa ii ia astfel cateva mere, pe care le-a daruit tatalui sau. Apoi, a plecat impreuna cu fratii lui dupa zmeu, pe urmele darei de sange si au ajuns in fata unei prapastii care ii indruma catre celalalt taram, unde numai mezinul a avut curajul de a cobori. Odata ajuns acolo, a zarit trei palate ale unor trei zmei si invingandu-i, a salvat trei fete de imparat. Presimtind ca fratii lui vor sa scape de el, i-a facut sa creada ca a murit si a iesit pe urma din prapastie cu ajutorul unei pasari, careia ii salvase puii.
    Ajuns inapoi in imparatie, Praslea si-a dovedit identitatea cu ajutorul celei mai mici fete de imparat. In final, acesta i-a luat locul tatalui si s-a casatorit cu fata iubita.