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Wednesday, May 3, 2017

WRITING 6. Operating System

Operating System

An operating system, or OS, is a common computer piece in the world today. An OS is an intricate set of software programs that helps organize information within a computer’s hardware. It can store information and retrieve it from memory systems or the hard drive. It can also direct applications and programs within the computer or from portable sources. In essence, an operating system communicates between the hardware and the programs as an organizational tool.

Memory management is the function that controlling and coordinating memory location and either allocated or free blocks to various programms to optimize overall system performance. There are 4 types of technique ways to manage memory.

1. Single contiguous allocation

2. Partitioned allocation

3. Paged memory management

4. Segmented memory management

All this techniques has their own advantages on their own. In hardware memory management involves components that physically store data, such as RAM (Random Access Memory ), VRAM (Virtual RAM), GRAM (Graphical RAM), chips, memory caches and flash based SSDs (Solid Star Drives)

2. Device manager is control panel applet in Microsoft Windows operating systems it allows users to view and control the hardware attached to the computer. Hardware devices typically provide the ability to input data into the computer output data from the computer. Device manager is a feature of Microsoft Windows that detects and lists hardware devices and their status information. Device Manager is available in Microsoft Windows 95, 98, ME, 2000, 2003, XP, Vista, 7, 8, and 10.Device management does the following activities for device manager.Keeps track of all devices, decides which process gets the device allocates way, de-allocated device. Device manager important to make sure it’s well designed.

3. A file manager or file browser is a computer program that providers a user interface to and folders.It has limited capalities and is designed to manage individual or group files, such as special office documents and records. A file management sustems is also known as a file manager.File manager is a software program that helps a user manage all the files on their computer.For example, all the managers allow the user to view, edit, copy and delete the files on their computer.

4. Network management is the process of administering and managing the computer networks of one or many organisations. Various services provided by network managers include fault analysis, performance management, provisioning of network and network devices.

5. The Process manager is an integral part of any modern-day operating system (OS). The OS must allocate resources to processes, enable processes to share and exchange information, protect the resources of each process from other processes and enable synchronization among processes.

WRITING5 Networking

Networking

A network is two or more computers, or either other electronic devices connected together so that they can change data. Network connections between computers are normally created using cables and wires. But connections also can create using radio signal like wireless and Wi-Fi and telephone lines like modems in our house or even, for long distances, via satellite links.

There are many uses of network. A network allows computers to easily share files and data, share resources such as a whole room of computer share a single printer or internet connections, users also can communicate each other, etc.

Firts. Neworking devices that filter that traffic are called connectivity devices and there are several different types: Bridge,Hub,Switch,Router

Bridge is connectivity device that forwards data based on a physical address and operate at the Network Access layer in the TCP/IP.
Hub typically do not filter data but instead retransmit incoming data packets or to all ports.
Switch,simplified is smarter version to all ports.
Routers are an essential part of the any layer TCP/IP that would be the IP address.

Second.networking types.this part is about most famous connection type and their adventages

1.WAN(wide are network)

much larger than other connection types. Wholle world and it includes of the LANs and WLANs

2.MAN(metropolitican area network)

it includes other min network such as LAN,PAN

3.LAN(local area network)

it showes higher speed than others for sharing data resources

4.PAN(oersonal area network)

its adventage is for example you can share photos,connect device,watch your TV from your phone

5.PN(private network)

with this network any person or company connect to each other without internet and without losing their datas to internet.

After that think of a topology network's virtual shape in structure and computers are a home network be arranges in a circle in a family room other rooms. Network topologies are categorized into the following basic tyoes.bus,ring,star,tree,wesh topologies. Topology remains an important part of network design they .You can probably build a home or small business computer network without understanding the differance between a bus design and star design but becoming familiar with the standart topologies gives you a better understanding of impotant networking concept like hubs,broadcats and routers

Next.the variety of network hardware adapter resources verify that the network adapter is properly installed and f=detected by the computer with no conficts. In Microsoft Windows, open the Device Manager and verify there are no errors "Network adapters" should be present for each network adapter installed in the computer,similar to the e.xample on the right. Wired network is the picture to the right is an example of a LAN port with.
Even though, the network is useful in our daily life and can solve the issue surrounding the environment but it still have some disadvantages. Communications technology and computer networks are always vulnerable to hackers. When the network breaks, it many cause many tasks become very difficult and more easily to attacked by a virus. For example, if the network hacked, the sensor device will spoil and cannot function. If it connects to the Internet, the data that receive will become not accurate and reliable. Therefore, we have to use the network properly.

Saturday, April 29, 2017

WRITING 4. Effect of technology on communication

Effect of technology on communication

21st century is the century of all modern new technologies and is the era of a new communication level. Technology has great effects of how people communicate with eachother. For me, I agree that it effects people in a good way, but it also has it's negative side. Let me explain the reasons that I think so.

First of all, there are 7.125 billion people living in the world. Communicating through internet is something everybody use to keep connected no matter how far they are. One example would be facebook. Mostly everyone uses this new tech to be friends with their family, friends, colleagues, classmates by posting pictures, sharing info and updating statuses. Another example could be skype, where anybody could talk to eachothber by looking at themselves. This is a great way to keep in touch with people with distance.

Secondly, not only do these people chat and video call, a lot of other things are there to be utilized. Other than interacting with people, we also share and get information in a short amount of time. Long time ago people used to order newspapers, listen to radio or gather up to see the news but thanks to technology we are now able to get as much information that we need, right in our cell phones, tablets and smartphones. Televisions have also updated to smart tv where the remote control is not even needed.

Even though technology has impacted so much in our everyday lives, it also has it's negatives. People connect with their internet so much, there is rarely face-to-face interaction. Children prefer to play video games rather than playing outside. Teenagers spend their time on their physical core looks like.

But the again, technology has both it's effects and deffects of people's lives and how the impact our daily tasks. If we keep a balance between these impacts, we are sure to live a happy and successful life.

Tuesday, April 25, 2017

WRITING 1.The chart below shows the total number of minutes (in billions) of telephone calls in the UK, divided into 3 categories, from 1995-2002.

The chart below shows the total number of minutes (in billions) of telephone calls in the UK, divided into 3 categories, from 1995-2002.

The bar chart shows UK's telephone calls, by category in thousand nine hundred ninety five -two thousand two. This bar chart illustrates Local-fixed Line, National and mobiles calls type. You can see from this picture x axis is year and y axis is minutes.

Local calls increased between eighteen billion minutes in thousand nine hundred ninety five to thousand nine hundred ninety nine and decreased between eighteen billion minutes in thousand nine hundred ninety nine to two thousand two. The highest jump was ninety billion minutes in thousand nine hundred ninety nine.

National and inter national calls increased between twenty three billion minutes thousand nine hundred ninety five to two thousand two. The lowest in thirty eight billion minutes thousand nine hundred ninety five to two thousand two.

Finally, mobile calls until growth forty five billion minutes in two thousand two. This change was sharply between in thousand nine hundred ninety five to two thousand two.

In comparison Local calls use better than National and Inter national calls and mobile calls.

word:155

WRITING 2 People use computers when they work

People use computers when they work, go banking or everywhere, but some argue that, it will make people isolated and decrease social skiils

Computer have become most used things in our daily lives. Before I write my point of view on this I'll explain people's usage, advantages and disadventages about this.

First advantages and usage. As I said it has become most usage in job, at school and home thing in our daily lives. It makes mathematical calculations faster. Also it is easy way to communicate with friends or family member that live away.

Second disadvantages. It has many disadvantage. I'll name a few. It you sit in frond of computer for too long you get headache backache. When you go to bed and if you turned on your computer your brain wont get nessery rest.

Next my point on people being isolated and have decreased social skiils. I think it's true that people would have decreased social skiils. They may not out from home sitting all day in front of computer playing video games. Some people will say that they would loose contact with reality. But the in another hand we can't blame people whose work would involve using computer in daily base.

But I think the main reasonthey are being isolated bacause. They are being mistreated or bullied. Maybe they are socially awkward for that reason they find computer easy way to treat their mistreated behaviour.

In conclusion I think we must help them to overcome those weaknesses so they can be socially active. (word:233)