Тема 11 Оптичні диски. - part 20

1 Прочитайте та вивчіть терміни (усно)

jumper – перемикач;

storage - пам'ять, запам’ятовуючий пристрій;

capacity – ємність інформації, продуктивність;

switch on / off – увімкнути / вимкнути;

to damage – пошкоджувати;

to rotate - обертати, повертати;

read / write head – головка читання-запису;

to spin – обертатися, крутитися;

fail – safe – стійкий до пошкоджень;

back-up file – резервний файл;

permanent – постійний, незмінний;

solid-state memory – твердо тільна пам'ять;

random access – довільний доступ;

read memory – пам’ять з оперативним зчитуванням, оперативний запам’ятовуючий пристрій;

read only memory (ROM) – постійний запам’ятовуючий пристрій;

random access memory (RAM) – оперативна пам’ять;

out of memory - брак пам’яті;

failure – аварія / вихід з ладу системи / пошкодження / програмна помилка;

semiconductor – напівпровідник;

temporary – тимчасовий, робочий;

primary storage – первинний / основний запам’ятовуючий пристрій;

2 Перекладіть текст на українську мову. (письмово)

A COMPACT DISK

A Compact Disc (also known as a CD) is an optical disk used to store digital data, originally developed for storing digital audio. The CD, available on the market since October 1982, remains the standard physical medium for sale of commercial audio recordings to the present day.

Standard CDs have a diameter of 120 mm and can hold up to 80 minutes of audio. There is also the Mini CD, with diameters ranging from 60 to 80 mm; they are sometimes used for CD singles, storing up to 24 minutes of audio.

The technology was later adapted and expanded to include data storage CD-ROM, write-once audio and data storage CD-R, rewritable media CD-RW, Super Audio CD (SACD), Video Compact Discs (VCD), Super Video Compact Discs (SVCD). CD-ROMs and CD-Rs remain widely used technologies in the computer industry. The CD and its extensions have been extremely successful: in 2004, worldwide sales of CD audio, CD-ROM, and CD-R reached about 30 billion discs. By 2007, 200 billion CDs had been sold worldwide.

A Compact Disc is made from a 1.2 mm thick disc of almost pure polycarbonate plastic and weighs approximately 16 grams. A thin layer of aluminium or, more rarely, gold is applied to the surface to make it reflective, and is protected by a film of lacquer. The lacquer is normally spin coated directly on top of the reflective layer. On top of that surface, the label print is applied. Common printing methods for CDs are screen-printing and offset printing.

3 Прочитайте опис технічних характеристик оптичних дисків, заповніть пропуски відповідними словами із списку. (письмово)

Active words: multiple sessions, slower, data, a laser, store, read – only, write – once, structure and capacity, high – definition;

OPTICAL DRIVES

Optical drives use (1) … to read and write data, so they are not affected by magnetic fields; but they are (2) … than hard drives. Modern DVD recorders accept all CD and DVD formats.

CDs can (3) … up to 650 – 700 MB of data. CD – ROMs are (4) … units, so you cannot change (5) … stored on them. CD – R disks are (6) … devices which let you duplicate CDs. CD – RW disks enable you to write onto them in (7) …, like a hard disk.

DVDs are similar in size to CDs (both are 1,2 mm thick) but they differ in (8) … . DVDs have more tracks and more pits (tiny holes) per track, and can store from 4.7 GB to 17 GB of data, movies, (9) … sound, etc., so they will probably replace CDs.

4 Заповніть пропуски (використовуючи Collocations) (письмово)

FAST CONNECTIONS

Connecting to the (1) … using DSL lines, cable TV and satellite increases bandwidth dramatically, making the Web more useful. Increased speed has ignited an explosion of (2) … commerce, video on demand, telecommuting, collaborative scientific projects, video conferencing and (3) … environments.

INTERNET2, SHAPING THE FUTURE

Internet2 is not a single network, but a consortium of hundreds of (4) … networks linked by fibre-optic backbones that span the United States and link to other countries. The network transmits (5) … at speeds up to 2.4 gigabits per second - 45,000 times faster than a 56 Kbps modem - allowing scientists to test their laboratory discoveries in the real world. The next-generation network went (6) … in February 1999, linking a number of universities around the world. When it is in commercial use, services will be available like (7) … television, virtual 3-D videoconferencing, and much more.

A NEW KIND OF WEB

While PCs were once the primary means of accessing the Internet, we're now seeing Internet-enabled devices such as PDAs and cell phones that send and receive (8) … and access the (9)… . Soon, everything from your car to your refrigerator will be connected to the global network, all communicating with each other wirelessly.