Purpose Of Computer Components Computer Science Essay

Purpose Of Computer Components Computer Science Essay There are many peripherals inside computer base, which process instruction via buses/wires to other hardware/software. Those are hardwares that works together and shows output/input. Such as Motherboard, Monitor, Operating system, Keyboard, Mouse, Speakers, CPU (Central Processing Unit), Hard Disk (storage devices) and Graphic card /video card. My aim is to describe about hardware, role of hardware and specification. Nowadays, technology growing very fast, even mobile, PDA works as computer, without having hardware like computer. In this report, the user will get more knowledge about hardware. The CPU is main device to maintain and provides order to RAM. If we go to deep then, the CPU has for factor of execution, such as PC (program controller), CU (control unit), and ALU (arithmetic logic unit) and finally is storage (registers). But clock is important device which maintain frequency (voltage) within computer system. A RAM is short term memory hardware which gets order from CPU and sends it hardware to run and launch. A RAM have priority to transmit data to anywhere within system. Secondary memory is non volatile because it holds data for permanent and CPU is not direct contacting with memory. A magnetic disk and optical device is secondary device because you use that device anywhere and any location by modelled by USB system. A supportive device and input/output devices also important to support other device for improve efficiency, performance and execution. Process of computer system Other I/O e.g. USB, ETHERNET and other components Diagram (1.1) [1] Control CLOCK KEYBOARD CPU, CATCH SRAM/AVL, general register MAIN MEMORY HARD DISK Data buses, 64 wire Address bus 16, 32, 64 serial wires Control buses: lot of different signal RW line e.g. clock signal Diagram 1.1 shows a CHIP clock is manages and handles all activity of hardware and software. It controls the traffic (frequency/voltage/bandwidth) within internal buses that make sore every components of computer system should get right amount of duty (instruction). When user gives command to computer system, than a CPU (central processor unit) gets instructions, that moment a clock chip controller performs to processor should get reliability. After, a processor passes information within second to Memory RAM. A memory ram is short term storage devices which executes information from CUP and shows output to user. A RAM sends instruction to other internal devices to perform. After that, a software/ or hardware start functioning. I would like to describe about hardware of computer system. [3] CPU (central processing unit) is a main primary hardware of computer system which is carryout the commands from software and categorise task in sequential order. A role of CPU is to perform programs that stored in the main memory via fetching their orders. It is responsible of fetching commands from the memory and formative their type. It has four major models which are Arithmetic logic unit (ALU), Control unit, registers, and Clock. A CUP calculates Arithmetic, assignment statement, Boolean statement and logical statements which are performed by CUP. It also holds high-speed memory to store output and some control statements. Central processing unit (CPUs) [2] This memory is registered with functions; the most important program is program counter (PC), which indicates to next command to be executed. And also there is another register which contains instruction of current processing task. A CPU needed a motherboard and RAM to transmit instructions and Ventilation sink to cool down the CPUs internal materials (buses). [2] CPU processing cycle: it is execution process where the instructions processed by sequentially within CPU from memory. A cycle mean it keep reaping and executing instructions until a task is finished or reached. Primary memory and secondary memory RAM (random access memory) [5] before in 2003, RAM shared 512 memory that provided by system but nowadays RAM memory reach up to 1 or 4 GB, when RAM is not capable to transmit the data flow within its ability, then the user might have install another RAM. So the system can run faster and task will be monitored by operating system. As we know that memory controls the signal traffic, but upgrading latest RAM, improves the traffic signal of data/task, works faster than before and also you will get quick response from computer system. Basically, memory is measured by increase of bits and bytes. [4] It stores data that can be access sequentially. If the data is not reached or not found at present position, than each memory bytes checked until get full information or found data. A SAM (serial access memory) is a partition of RAM that helps to transfer (buffer) data; organise data in order and then stores. A memory is integrated circuit (IC), which developed by 100 thousands of transistors and capacitors. Most basic RAM circuit is DRAM (dynamic memory random access memory). A capacitors and transistors produce a memory cell, which represents a signal bit of data (1 or 0). A capacitors is contains one signal digit at one time (voltage) and transistor works as switch, so it lets the control circuitry on the memory circuitry reads that binary words that capacitors contains and modify its position. Memories consist of a cells and each cell organised by address. A CPU (central processing unit) interact with main memory by sending signals to two registers of memory, which are memory address register (MAR.) and memory buffer register (MBR). When a CPU wants instruction from memory, it sends address of instruction to MAR and send digital frequency to memory the memory. After that the memory stats functioning and insert that instruction to MBR, where the CPU can access that frequency. The CPU set the address into MAR and cells are stored in the MBR. Finally, the memory is starts working and store set of instruction. A memory needs slots to locate into motherboard. The user can input two memory chipset at one time. There are two type of chipset which are DDR and SDRAM, its sends instruction twice at same time. [5] A program only launch from main memory and OS (operating system) holds instruction until needed. Secondary memory As I defined differences of primary memory; a CPU can be directly access it but in secondary memory, CPU does not access instruction or data directly. Normally, secondary memory is cheaper, longer and has larger capacity. Also it hold large amount of data. Hard drive Today, the hard drive is available in various formats, such in larger capacity. It used to hold up permanent data such as operating system, files and application. A disk is made from metal or made from special glass or aluminium or alloy material, which is LP phonograph used to record. The user can save large amount of data for permanent. A memory does not disappear when computer is shutdown. It holds memory until user needs. A hard disk is holds bytes and bit and that converted into file/folder. However, when program is running that moment the hard disk retrieves instructions and sends data to CPU at the one time. Commonly, the hard drive is transmitting data between 5 to 40 Mbps. When a CPU request for data from hard drive, that time the data transmitted to CPU between 10- 20 milliseconds. [15] Information is printed on a patterns and tracks. Track means concentric circles and patterns are in pie shaped. The disk has hundreds of tracks per shell. There are data reader head that move to closer or move back to central. The head is long enough to read or write data from whole CD, when its spinning. A hard drive have many disk installed vertically by inch apart and every disk patterns have a head that movies together and executes data at same time. Each disk drive has installed with disk controller. The controller transmits data between main memory and disk. Once a data start executed, the memory set the address for that data and keep information about where to go? And keep address of data that executed from. A disk have many sectors are divided by tracks, basically, 10 to 100 sectors per track. [15] Disk storage and USB storage: A disk is third memory storage device because the user can take anywhere. A DVD drive is rewritable compact disk knowledge. A user can save data from hard drive or load the data into it for purposes. It is burns various type of disk in different formation such as music, video and file. There also external DVD drives that can be connect via wire. A DVD drive data read rate is 48* (CD) and 16* (DVD); also writing rate is 48* (CD), 6-8 * (DVD) and 12* (DVD RAM). A user need a disk drive that record data into disk, but in DVD drive a laser reads data from surface of disk and then transmitted into computer system. A purpose of the Disk is to backup data and for protection. [6] A USB (universal serial bus) devices are very easy to use and a device created for universal use, because a small chipset, it can store large data. It usually works in any computer or other device and range of components can be connected easily. A USB 1.1 has ability to transfer maximum rate of1.5 12mbps. [6][7] Input and output devices Scanner/printer: a scanner is important device to convert paper base information into digital information and printer is printing digital information into paper. Basically, the user gives instruction to printer to print data but computer recognises its components by driver. Most common function of scanner is CCD arrays. It collects small lights -responsive diodes which change light into digital. However, an inkjet printer uses small droplets of ink to create image. The dots are very small and tiny between 10-3 dots per millimetre and positioned to exact location. [8] Keyboard, Mouse A keyboard is very common hardware to input/guide instruction and for manage computer system. It can connect via wire or USB ports. It has many characters to interact with PC, such as numbers, symbols and alphabets. It has switches to translate the person who type character into bytes so computer can understand. Most of keyboards have 80- 110 keys including functional key, control key, numeric pad and typing keys. Inside the keyboard, it has own circuitry and processor to take instruction to CPU. [9] A mouse is best model to interact with computer system without typing in; control censor movement and have ability to point on the object on computer monitor. It gives you easy accessibility to perform function of computer system. A mouse (device) installed with either sensor or roll ball to create/navigate motion. There are different mouse developed which is optical, touchpad and roll ball. An optical mouse has track sensor (CMOS: complimentary metal-oxide semiconductor) that scan surface and does not need a pads to support. The CMOS sensor transmits every collected image to digital signal processor (DSP) for analysis. Basically, a DSP measured the collection of data that how patterns are moving from previous image. [10] Support devices Motherboard Motherboard is main part of the computer and it handles communications between devices via transmitting electromagnetic power. A motherboard has many supports components to hardware, such lithium betray, DDR memory slots, 12v ATX power connector, AGP slots, chipsets, USB headers, PCI slots, CPU, HDD headers, IEEE (network) etc. Each function of motherboard has own responsibility to support internal hardware. There are many comprised individual circuit traces that is in collection of form of buses. Traces are skinny conductors or circuits on motherboard that works combine for a specific aim. It transmits electrical frequency (signals) from HDD, CPU and RAM then to other devices. A motherboard Bus is work with internal chipset/circuit to move exist data within motherboard. A motherboard can be process 32/64 bits, and transmit data up to 800-2000 MHz Major functions of the motherboard is chipset which is north and Southbridge; usually, it behave as traffic signals on the motherboard to measure high and low voltage communication to reduce data crashes. A Northbridge manages high speed communication between CPU, Ram and supportive hardware but Southbridge manages slow speed of communication based device between ports and slots, such as USB, IDE, parallels, serial, keyboard etc. [11] Graphic card A graphic card is provides supportive abilities for media bases software or hardware to work and run properly. Specially, an Intel chipset (G965, GM965, G33 etc) developed to support games animation, high resolution, and GUI (graphical user interface). A graphic card is allowed to experienced high definition GUI without needed for add-in components. Most of the graphic card is installed within motherboards AGP slot. A role of GPU (graphic processing unit) is to draw entities (geometric and mathematic calculation) that moving fast image that observe the monitor and its high level of language produce for graphic interface. To target that real time animation, the GPU must perform much floating-point operation per second. A GPU measured a shape and type of data and passes to execute function at GPU [12]. A GPU modelled by vector processing modelled, to support high application and support their functionally and GPU parallel architecture allows to perform faster, boosting rate of executi on. A manufacture developed much kind of GPU and to support; the user needs to install drivers. Currently, there are two type of GPU interface, which is OpenGL and DirectX [ref]. Because, those are interfaces developed for programming graphic operations. Figure 1.4[12] Reason I wrote about GPU because it has big responsibility give graph card to support other elements. An image we see on the monitor, it is tiny dots of pixels and that pixels are common regulation setting; each block of cells has thousands of pixels. Graphic card is translator binary data from CPU and convert into image. Basic principal of CPU is to transmit instruction that provided by software and graphic card decides how much pixels have to use to describe image. After that it transmits information to the monitor through cables. It also contains output/input technology, such as memory, processor, heat sink, motherboard connector. [13] Conclusion To conclude all about computer hardware, including CPU, memory and supportive device that work together. My aim is to describe about ability, specification and role of hardware. When the user is interact with computer system by mouse or keyboarded. The CPU gets information and converted into instruction. Basically, CPU produces order for components via using different device, such as RAM, ROM. My decision is that, by upgrading hardware, the computer system may work fast, reliable and accessibility will improve. Normally, Secondary memory provides space to hardware/software to launch and primary memory directly communicates with hardware. There are various memory which helping RAM to work faster which is registers, catch memory. The registers are addresses the executed instruction and processed instructions. A CPU does not communicate with secondary storage device, because the data is keeps permanents and can only use when needed. Its also known as magnetic disk, which is a data store in tracks and addressed blocks but when computer is shutdown, the data cannot erase. This is advantage of having secondary memory in computer system. A disk is also important to back up data, so user can use in different computer. Recently, optic storages are growing and making place in market, because it can be use anywhere and more protected. However, the user can re-write on disk or optic storage device. A scanner scans paper based information and converted into image, but that image, a printer prints it. The advantage of having scanner is to keep data in digital way and when it needed data will printed. A purpose of mouse is to interact and select object from monitor, so without inputting, a system going to run much easier. But a keyboard has many symbolic buttons and each buttons are address by bytes which keyboard processor convert into binary and transmitted to CPU. A motherboard developed by many functions to support and provide communication channel to hardwares which is connected to. Basically, it transmits an electric power via system buses and Northbridge manages high speed of CPU, RAM and ROM but Southbridge manages high speed of external devices, such as secondary and optic memory. A graphic card has important role as well to provide clear and sufficient image on the monitor. GPU is measures complex geometric shape and do mathematical calculation to make GUI (graphical int erface system) system.

Impact of Prison on Fyodor Dostoevskys Poor Folk, The Double, and The Idiot :: Dostoevsky Poor Folk Essays

Impact of Prison on Fyodor Dostoevsky's Poor Folk, The Double, and The Idiot Fyodor Mikhailovich Dostoevsky is perhaps one of the most well known but least understood authors from the nineteenth century. His life was one full of misfortune and suffering; his works filled with religious pondering and philosophical discussions. Dostoevsky's life experiences were integrated into the characters in his pieces, both in terms of personality and ideology. An especially important turning point in his life was his arrest and imprisonment at the age of twenty-seven, shortly after the beginning of his writing career. This prison sentence and time in exile served to shape his perceptions and beliefs towards life, which were then incorporated into his literary works. Dostoevsky entered the Chief Engineering Academy in Saint Petersburg in 1838, at the age of 17. Upon his graduation, he served in the civil service, but gave it up to pursue writing full-time. 1846 saw the publishing of his first books, Poor Folk, and The Double. In Poor Folk, he explores some of the social issues of the day, and the work has even been dubbed of a "socialist character." During this time, he had joined forces with other young intellectuals, and began attending meetings headed by Petrashevsky. These young "social realists" would meet and discuss current political issues -- most importantly, the idea of the liberation of the serfs. This issue was especially of interest to Fyodor, who had been exposed to the cruelties of serfdom early in his life. He had a deep hatred of the institution of serfdom, which was perhaps rooted in his guilt towards the murder of his father. It was thought that Mikhail Andreevich was murdered by his own serfs during a particularly violent bout of anger towards them. Fyodor, while he was in no way associated with the death (he was in school in Saint Petersburg at the time), none the less felt guilt. Part of this may have been due to his incessant nagging for more money from his father during his last few years. This group of idealists was influenced by the changing political status in Europe during the middle of the nineteenth century. This was a time of a new social awareness -- new rights and liberties were being fought for and won, governments were transforming, and a series of "utopian socialist" books were quickly becoming popular. Dostoevsky had been an avid reader of such authors as Hugo, Sand, Sue, and others in this field.

Is Australia a Racist Country

Racism is discrimination or abusive behaviour towards another race or religion. Australia is a very young multicultural country where at hand is strong evidence to suggest that Australia is racist, and in contrast there are many examples that support this questions that we humans beings can live in peace and harmony with all Australians. According to the ABCDiamond The proportion of the population of Australians born overseas is quoted â€Å"over one quarter of Australians were born overseas†. This means 25% of Australians are born overseas. Some possible causes of racism can be of an institutional racism, which means that a group of people have the same faith about a certain type of person. Racism can be from the past and what people of many different generations express to others about it which follows to be a stereo type of a group of people, such as Germany and the Jews. Many people may think because Hitler was German that all Germans were and always will be bad. At times we hear parents and grandparents being racist based on their opinions on world events such as September 11. This created hatred and anti-Muslim feelings in the general public. In Australia Muslim leaders spoke through the media condemning the attack as many Australians started to form racist opinions about all Middle Easterners. This is an example of indirect racism based on stereo typing. Sometimes racism may simply be caused by ignorance and judgment formed through a lack of knowledge and information. This may be considered unjust and unfair because people are judging based on a stereotype. Professor of Geography from the University of Western Sydney says that â€Å"Australians arnt dealing with ‘cultural diversity’ properly and are being racist and disrespectful to those whom are from a completely different culture and the government need to do more to manage this issue. Another example of racism was when Dr Hanif was deported for suspected links to terrorism. Other stereotypical attitudes present amongst Australians include, Asians are bad drivers, Aboriginals are lazy and a burden on society, Middle easterners are fighters and the French are arrogant. The Cronulla riots of 2005, was an example of mob violence and interracial racism between the Lebanese and local Anglo youth to â€Å"reclaim the beach† and to move out of their suburbs. Another resent development is the racism towards Indian students studying in Australia. People assume that they are taking study places and jobs from Australian’s when they are often wealthy, self-supporting and not necessarily a true representation of all people from their country. They are often being targeted by groups within Australia for their display of wealth (I-pod etc) Racism will continue because of general comments by the public and the influences of the media. For example 9/11 has made our world a place of heightened security, awareness and nervousness particularly as we relate to members of different cultures . Sometimes discussions between people’s opinions can instill racism in younger generations. Media sources such as the news and the internet can be covering stories in ways that present bias towards a group or race and this can also cause racism. The government’s inactions to take a stand against racism may also contribute to racism continuing. Surely the government with its intake of migrants and refugees needs to take a greater look at how to encourage communities to live more harmoniously. One example, in which the Government does promote diversity and acceptance, is through an annual initiative called Harmony Day. On March 21st, 2010, schools, communities groups and organisations celebrated our cultural diversity to show that everyone belongs. Another community effort raising cultural awareness was the Indian concert by A.  R. Rahman which was organised as part of the Sydney Festival in Parramatta last year. The event was part of a wider initiative of the New South Wales Government to ease relations between the country’s significant Indian population and the wider Australian community. According to the Indian Local, (January 17th 2010) Cricketer Matthew Hayden interviewed members of the audience during breaks. â€Å"The thing to remember is that we are all the same inside,† said a young man he spoke to. This is a very important statement because it could actually be the key to preventing further racism. If all Australians could believe this way, we would live in a more peaceful society. Many would argue that Australia, with its large population of overseas born people is a non racist nation. We have suburbs in Sydney which delight all cultures and signify multiculturalism at its best. The Italian’s in Leichardt, Lebanese in Auburn/Bankstown, and Chinese in Cabramatta and Chinatown in the city. Governments and local councils might encourage festivals and awareness through entertainment and local media e. g. Chinese New Year festivals. This is a display which shows that Australian’s are indeed quite accepting of other races. Governing policies such as the Commonwealth Racial Discrimination Act (1975) aim to ensure that â€Å"everyone is treated equally, regardless of their race, colour, descent or nationality or ethnic origin†. According to the Australian Department of Immigration and Citizenship we are processing applications for asylum seekers from war torn countries such as Iraq and Afghanistan. The Asylum Seeker Assistance Program is a scheme that has been set up by the government to assist these people with income support, and advice as they wait to gain refugee status. This is an example of how the government is accepting and supportive of new migrants in our country. Similarly the Rudd government showed compassion to the Aborigines when we â€Å"Closed the Gap† in 2008 by apologizing publicly to the Aboriginals for mistreatment of them by our country. This public recognition of unfair and unjust treatment shows a willingness to be a non racist country in the eyes of many Australians. So, is Australia a racist country? It is evident that Australia’s growing population of migrants will continue. With this growth it is hard to predict that racism will cease. However, the need to reinforce that all humans have feelings and have rights will be the answer to stopping racism. We need help from the government, media and leaders in our society to breakdown institutional racism. We need to take a more collaborative approach as Australians and as members of the global community. Racism has no quick fix solution but with improvements in communication and understanding of each other as individuals we can create a more harmonious place to live.

The Vietnam War And The Long Arms Of American History

The Vietnam War is a sore spot in the long arms of American History. Nearly 60,000 Americans died and estimated millions of Vietnamese. It was considered to be the longest war in American history as well. Many questioned the motives and causes of the war calling it an atrocity. Others say that it may have been a terrible effort to defend a noble cause, the spread of communism. The years precluding the Vietnam war, there was a war taking place in Vietnam. It was known as the Indochina War, where the Vietnamese waged war against the colonial rule of France. The French were defeated in the battle of Dien Bien Phu. Following this defeat, there was a peace conference in Geneva, which resulted in Laos, Cambodia and Vietnam to receive their independence. The Geneva Accords officially divided Vietnam into North Vietnam and South Vietnam. Ho Chi Minh and his communist forces led the North. A French backed emperor led the south until elections in 1956. 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