What Type Of Camera Does David Lachapelle Use

TYPES OF Reckoner SYSTEMS: FROM MAINFRAMES TO Wear COMPUTERS

A mainframe is the most powerful blazon of reckoner. It can process and store large amounts of data. It supports multiple users at the same time and can support more simultaneous processes than a PC. The central system is a large server connected to hundreds of terminals over a network. Mainframes are used for large-scale computing purposes in banks, big companies and universities.

A desktop PC has its own processing unit (or CPU), monitor and keyboard. Information technology is used equally a personal computer in the domicile or as a workstation for group work. Typical examples are the IBM PC and the Apple Macintosh. It'south designed to exist placed on your desk. Some models accept a vertical instance called a tower.

A laptop (likewise called a notebook PC) is a lightweight estimator that you lot can transport easily. It can work as fast every bit a desktop PC, with similar processors, memory capacity, and disk drives, but it is portable and has a smaller screen. Modern notebooks accept a TFT (Sparse Picture show Transistor) screen that produces very sharp images. Instead of a mouse, they take a touchpad built into the keyboard - a sensitive pad that you can touch to motility the pointer on the screen. They offer a lot of connectivity options: USB (Universal Serial Bus) ports for connecting peripherals, slots for retentivity cards, etc.

They come with battery packs, which let you lot use the computer when there are no electrical outlets available.

A tablet PC looks similar a volume, with an LCD screen on which yous tin can write using a special digital pen. You tin can fold and rotate the screen 180 degrees. Your handwriting tin can exist recognized and converted into editable text. You tin also type at the detached keyboard or use vox recognition. It's mobile and versatile.

A personal digital assistant or PDA is a tiny computer which tin can exist held in one paw. The term PDA refers to a wide variety of paw�held devices, palmtops and pocket PCs. For input, you type at a small keyboard or use a stylus - a special pen used with a touch screen to select items, draw pictures, etc. Some models incorporate handwriting recognition, which enables a PDA to recognize characters written by mitt. Some PDAs recognize spoken words by using vox recognition software. They can be used as mobile phones or as personal organizers for storing notes, reminders and addresses. They also permit y'all access the Internet via wireless engineering, without cables.

A wearable computer runs on batteries and is worn on the user's body, e.thousand. on a belt, backpack or vest; it is designed for mobile or hands-gratis operation. Some devices are equipped with a wireless modem, a small keyboard and a screen; others are voice-activated and can access email or voice mail.

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ane - a portable computer that can exist airtight upwardly similar a briefcase, but it tin can exist as powerful as a desktop PC;

two - a small-scale computer that fits into items of clothing;

3 - a full-function PC, though it only weighs 1.2 kg - y'all tin go to a coming together and write your notes on it, like a paper notepad; its screen style tin be changed from portrait to landscape;

4 - a hand-held computer which tin be used as a telephone, a web explorer and a personal organizer;

5 - a typical figurer found in many businesses and popular for habitation apply;

half-dozen - a large figurer used for intensive information processing and often linked to many terminals;

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ane. What type of computer is advertised? 2. What kind of screen does it accept? 3. Which pointing device replaces the mouse? iv. What type of ports does it accept for connecting cameras and music players? five What sort of power supply does it employ?

TOSHIBA SATELLITE

- Intel Centrino processor;

- 1,024 MB RAM, 100 6B hard deejay drive;

- DVD SuperMulti (+/-R double layer) drive;

- 15.iv" widescreen TFT active-matrix LCD display;

- 85-key keyboard and touchpad;

- 2 retention slots, 1 PC Bill of fare or PCMCIA slot;

- Wireless communications: Wi-Fi compliancy and Bluetooth;

- four USB ports for connecting peripherals: digital camera, MP3 player, modem, etc.;

- half-dozen-jail cell rechargeable Lithium-ion battery pack;

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1. IBM's BlueGene is the most � supercomputer. (Ability) 2. Well-nigh library databases are � via the Net. (Admission) three. I'll email my report to you as an � (Attach) 4. This volume volition bear witness you how to � your minor concern. (Reckoner) 5. An � optical disc allows data to be deleted and new data to be recorded on information technology. (ERASE) half-dozen. The growth of the Internet has increased the need for effective data � (SECURE). vii. The combination of � and new textile materials has fabricated it possible to create musical jackets and smart shirts that can read our center rate. (ELECTRON) eight. Bluetooth is a� technology designed to connect computers, mobile phones and other devices, replacing straight cable links. (WIRE) ix. Aircraft flying � is used to train pilots. (SIMULATE)

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CASH MEMORY

Near PCs are held back not by the speed of their main processor, but by the fourth dimension it takes to motility information in and out of retentivity. One of the nearly important techniques for getting effectually this bottleneck is the retention cache.

The idea is to use a modest number of very fast memory fries as a buffer or cache between primary memory and the processor. Whenever the processor needs to read information information technology looks in this enshroud expanse first. If it finds the information in the enshroud and then this counts as a 'enshroud hit' and the processor demand not become through the more than laborious process of reading information from the chief memory. But if the information is non in the cache does it need to access primary memory, but in the process it copies whatever it finds into the cache then that it is at that place ready for the adjacent time it is needed. The whole process is controlled by a group of logic circuits called the cache controller.

One of the cache controller's principal jobs is to look after 'cache coherency' which means ensuring that any changes written to main memory are reflected within the cache and vice versa. There are several techniques for achieving this, the most obvious being for the processor to write directly to both the cache and main retentivity at the same time. This is known as a 'write-through' cache and is the safest solution, but likewise the slowest.

The principal alternative is the 'write-back' enshroud which allows the processor to write changes only to the cache and non to main memory. Cache entries that have inverse are flagged as 'dirty', telling the cache controller to write their contents dorsum to main memory before using the space to cache new data. A write-back enshroud speeds upwards the write process, but does require a more intelligent enshroud controller.

Most cache controllers move a 'line' of information rather than merely a unmarried particular each time they need to transfer data between primary memory and the cache. This tends to better the chance of a enshroud hitting as virtually programs spend their time stepping through instructions stored sequentially in retention, rather than jumping about from i surface area to another. The amount of data transferred each time is known equally the 'line size'.

HOW A Deejay Cache WORKS

Disk caching works in substantially the same way whether you lot have a cache on your disk controller or you are using a software-based solution. The CPU requests specific data from the cache. In some cases, the information will already be there and the request tin can be met without accessing the hard disk drive.

If the requested information isn't in the cache, the data is read from the disk along with a big chunk of adjacent information. The cache so makes room for the new data by replacing old. Depending on the algorithm that is beingness applied, this may be the information that has been in the cache the longest, or the information that is the least recently used. The CPU's request tin and so exist met, and the cache already has the adjacent data loaded in apprehension of that information existence requested side by side.

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1 What is one of the principal causes of a PC not running at its highest potential speed?

two What device looks afterwards cache coherency?

three What is the master alternative to 'write- through cache'?

4 When does a write-back cache write its contents dorsum to main memory?

v When is data marked every bit 'dirty' in a write-back enshroud?

6 What determines what data is replaced in a disk cache?

7 What word in the text is used instead of 'buffer'?

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a Cache hit;

b Cache controller;

c Cache coherency;

d Write-through cache;

east Write-back enshroud;

f Line size;

i The procedure of writing changes only to the cache and not to main memory unless the infinite is used to cache new data.

2 The amount of information transferred to the enshroud at any one time.

iii The process of writing directly to both the cache and master memory at the aforementioned time.

4 The processor is successful in finding the data in the cache.

5 Ensuring that any changes written to main retentiveness are reflected inside the cache and vice versa.

6 The logic circuits used to control the cache process.

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WORD FAMILIES

It is useful to know how to build upward word families by adding suffixes. Look at these examples:

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