THE DISADVANTAGE OF COMPUTER

              THE DISADVANTAGE OF THE COMPUTER

  As much as the advantage of the computer, there re also the bad side of it. These are some of the example of the disadvantage of using computer

• Health issues

When we use computer for too long it will effect our health permanently and temporarily. When we are sitting in front of the computer for too long our body postures will be ruined. Research shows that most of us slouch our body making our backbone to bend and causing our backbone structures to change.One of other major issues are our eyesight. 

•  Violation of security

With the social network getting bigger, so as identity theft. As a computer and social network user, the personal information will to be filled out first to create an account. This will be where the identity theft take their victims identity and use it to do false accounts and etc.

•  Use of internet and computer can discourage the students to be less proactive.

Despite being an independent learner, the students will be more addicted to go through the search engine and find out the answer and copy them. This will cause them to just get the work done and not learn and find out like what others with no access to the computer as they will have to go to the library or the archive to search for information.

Thank you for reading the 5 series of blogs. I hope you'll enjoy it and tak it as n educational reading and maybe apply it someday. 

THE ADVANTAGE OF COMPUTER

                                    ADVANTAGE OF COMPUTER

  Computer has been an important tool for us today and that it definitely has change a lot since the 21st century. The impact towards us is huge. There is not all good and definitely not all bad in this era of technology.

The advantages of computers are:

•  Allows a 2 way communication between a student an their educator.

If there is ever a problem in understanding a certain topic, the student can easily access to the social network via whatsapp or telegram to ask about the topic needed to be focused on.
Apart from using the social network, the student can also use the educational portal created by the administer in their school to ask questions regarding the topic.

•  Enable the students to be an independent learner.

By using the computer or other electronic devices, students can discover many things that are related to their task or homework. This will encourage he students to do research regarding their tasks before seeking an immediate answer from their educators. 

Web based learning are also encouraged in nurturing the students to search the information needed for them to do their research via the search engine such as yahoo and google.

•  e-banking 

Customers can make online banking through the computer to pay bills to the bank.

Online shopping can also be done due to e-banking. This is because the payment can be made online.

•  Online newspaper

The widespread of technology allows the publishers to publish their news through the internet by using their websites or their apps. This will encourage everyone to read and make it as a habit during their leisure time. This is because, The computer and other devices are accessible and easy to get, that publishers can encourage them to read their newspaper through tablets and laptops.

•  Government websites 

The government websites are built to allow the citizens to gain information regarding their country or to see their taxes that needed to be paid. These are made possible by the websites that are built specifically for them.There are multiple government websites that are accessible to the public that are useful as some are for their information regarding the news and the truths about the statements spreading on the internet. The government has taken the initiative to correct the news that are viral on the internet so that, the public can differentiate the right and wrong of the news.

That's all from me. THANK YOU .

THE BASIC COMPONENTS OF A MOTHERBOARD

                             THE BASIC COMPONENTS OF A                                   MOTHERBOARD

  

   Everything starts in this system unit. 
In, this system unit or chassis , is where the motherboard is installed in a normal computer. 
The system unit is actually a case that stores and protects the motherboard, hard drive, memory and other electronic components.

Going back to our topic: 
The motherboard is a circuit board ( the main circuit board ) of the computer it holds many components of the system and provide connectors to other peripherals that is other hardware that makes up the computer.

In my educational syllabus, we learn only 3 components which are very basic and are crucial in the functions of the motherboard. These are known as the slots which holds the processor, the memory specifically RAM (random access memory ) because the ROM is already preinstalled on the motherboard. 

There are however, more than just these 3 slots that is provided in the motherboard circuit.

Let's just say the processor slot holds the processor and the processor functions to process the basic instructions that operates the computer. 

There are 2 units that is carried out by the processor which are the control unit (CU) and the arithmetic logic unit (ALU). 

The control unit (CU) functions to direct and coordinate most of the operations in the computer, while the arithmetic logic unit (ALU) performs arithmetic operations such as the operation of addition, subtraction, division and multiplication and it also performs logic operations such as comparing 2 pieces of data to see if they are equal or decide if the condition of a data is true or false. 

The processor carries out these function in a never ending cycle from the time that we turn on the computer to the shutting down of the computer, it carries out the function in 4 stages of the cycle known as Fetch, Decode, Execute and Store.

1.  Fetch 

• Fetch is the process of taking the instruction or data from the memory.

    2. Decode 

•  The processor will then translate the instructions into signals that the computer can execute.

   3. Execute

•  In the executing process, the processor will execute the commands from the instructions.
• This process is where the deciding process happens, It means that instructions are executed through either using ALU or CU or even both.

   4. Store 

•  The results is shown on the screen of the computer or the other output device, they are then stored.

  Next, is the memory, there is of course 2 types of memory as mentioned above. Memory functions to store instructions waiting to be executed by the processor and store the results of processing the data.

The memory store 3 basic categories of items namely.

•  The operating system and other system software
• Application programs
•  Processed data (information). 

 As we know the ROM and  RAM are 2 categories of memory that are distinct in terms of its function and how it works. The similarities are that both are memory and that they are placed on the motherboard, but as to where they are or how they were placed can be referred in the picture above. Obviously as stated ROM (Read Only Memory) is already on the circuit of the motherboard. The RAM however is situated on the memory slots. There are a few slots in which we can place our RAM. The RAM is also known as a volatile memory. A volatile memory is a memory that loses its content once the computer is shut down completely. This means that RAM only stores the results or other information temporarily. Well, technically that's the rule of the game but with the expansion of technology, we can now back up our search or the works we did in the computer, those are technically in the OS of our device and computers. The RAM is also known as the main memory as to where most of our results are stored, the trick is that we have not realize as to where the data goes and yes it was not stored permanently and as a user we are automatically trained to save the results of data and other information into the storage, which is another story waiting to be told. Simplifying this, the RAM holds data or programs that are currently being used by the processor.

The ROM ( Read Only Memory ), is already on the motherboard as stated, it is a volatile memory that means that it does not lose its content once the computer was turned off. ROM stores the information or the data permanently. As the given name, ROM cannot be modified as the content is mostly instructions and permanent data such as the instructions of the start up of the computers and other programs in the computers which are crucial for the computer. 

The storage is where all the data, instructions and the information are kept for future use. The keyword storage is ( future use ). It might not look as important as it really does but like I said, it's probably because I've just talked about the memory and that it stores all the results, you know so what?!, well the FUTURE USE word makes a world of difference in this topic. The storage keeps the results and information permanently. So, these informations and processed data are all kept in as storage media such as the CDs, pendrives or our memory card. 

In the adapter card slots, we have the adapter cards. The adapter cards is what enhances the functions of the system unit and provides the connectors for other peripherals. These adapter cards is also called the expansion cards. There are many types of adapter cards such as MIDI card which allows us to connect musical instruments to our computer, network card which provides network connections to the computer and the network, the video card or commonly known as the graphic card which is connected to the monitor and sound card which are connected to the speaker or the microphone. There are others that is USB card, modem card, Firewire card used to connects to high-speed printers and video camera to the system unit, TV tuner.

There are other components too apart from these 3 components such as the power supply, the chipset, hard disk and many more. 

THANK YOU for reading.

 

THE COMMUNICATION SYSTEM

                     THE COMMUNICATION SYSTEM

Hi again, this will be my second post and I would like to go straight to the point. Before going to our topic, we must first define what this is exactly. 

Firstly, in communication system, there is a network that is responsible to connect us all together in order to create a system. There is 2 types of network known as the human network. Human network is basically a system that assist us in sharing information and services among individuals or a group of people sharing the same interest towards a certain topic. Human network is generally a social structure comprising the individuals or organisations connected through technology and devices. This can be seen  through social network and technology and software combined together to allow these individuals to collaborate and share their interest in any types of interest or even their careers.

A computer network is a network that connects all the computers and other devices for the purpose of sharing information and resources and for computer communication.  

These branches of network had actually transform our lifestyle. It's fantastic and brilliant that it create a digital communication. Digital communication is the process in which 2 or more computers or devices can share data, instructions and information.

In digital communication, there are devices and tools that needs to be used in order for a successful communication to be achieved. We will need a sending device, communication device, a transmission media and the receiving device.

What exactly are these devices?

Well, to start off:

1. A sending device is a device that initiates instructions to transmit data, instructions and information.

A sending device are like servers, desktops, laptops and smartphones.

2. Communication devices are device that connects a sending device to the transmission media. There are many types of communication device,definitively speaking it will be a connector between these two device. 

For what we usually call as modem, these are the DSL modem, Dial-up modem and ISDN modem.

There are others like wireless access point, switch or hub, network cards and routers. Most of which everyone knows. 

A dial-up modem functions to convert digital signals into analog signal and vice versa so that the data can travel through analog phone lines.

Of course the difference between these signals are pretty obvious but what exactly is that ?

The difference is obvious in the amplitude of the wave of the signals being sent. The analog signals sends impulses through electrical pulses which are sent throughout the analog phone lines. This is however is a bit different when it comes to the digital signals because it uses the translation of these information into binary format and each bit is represented into 2 distinct amplitude of wave.

A DSL modem is a broadband modem that sends and receives digital data from the computers to the DSL line.

An ISDN modem is a broadband modem that sends and receives digital data over the computer to an ISDN line. 

A wireless access point is a central communication device that allows computers and devices to transfer data wirelessly among themselves and even to a wired network.

A router is a device that connects multiple computers or other routers together on a network.

A network cards, they're adapter cards which allows device or the computer that does not have a built-in networking capabilities to access to the network.

Switch or commonly known as a hub, is a communication device that provides a central points for cables to a network.

3. A transmission media is a material use in which the data travels through.

Transmission media uses materials that have the ability of 1 or more signals in a communication channel. 

So, there are 2 types of transmission media which are:

• wired
• wireless

The wired medium are well wires that are consisting of 3 types.

1.  Twisted paired cables. 

•  2 wires bundled together
• used for network cabling and phone landlines.  

      2. Coaxial cables. 

• A copper wires surrounded by 3 layers of braided metal and metallic tape.
• CATV ( community access television ) networking  usually uses these cables because they can be cabled over long distance.

     3. Fiber optics.

• uses glass or fiber strands that uses light to transmit signals.
• Used in a high speed communication.
• Smaller sized cable is used to obtain a faster communication transfer because ( smaller sized cables have bigger surface area and thinner and lighter ).

Next, the wireless medium. this will be the fun part because, well it's the transmission of data through the air or space. There is a few medium that is crucial to be noted as it is what we kept doing everyday.

• Infrared

1.  Uses light wave
2. Mobile computer or other devices usually have an irDA port that enable them to transfer data from a device to another device.

• Broadcast device ( Bluetooth )

1. They are short ranged 
2. Use to connect to the computer or other devices through infrared.

• Cellular radio ( 2G, 3G, 4G )

1.  A form of broadcast radio that is used widely for mobile communication that are wireless. ( mobile phones and modems.)

• Microwave transmission 

1. A radio wave that provides a high speed signal transmission over long distance. 
2. Signals are received through microwave station or satellites.

• Satellites 

1. Communication satellites is a space station that receives microwave signals from earth and then broadcast it back to earth.

That's all. Thanks for reading. Hope that it is usefull😏