Tuesday, December 8, 2015 in ,

What is Power supply unit?

A powersupply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use a switched-mode power supply. Some power supplies have a manual selector for input voltage, while others automatically adapt to the supply voltage.




Most modern desktop personal computer power supplies conform to the PSU specification, which includes form factor and voltage tolerances. While a PSU/ power supply is connected to the mains supply, it always provides a 5 V standby (5VSB) voltage so that the standby functions on the computer and certain peripherals are powered. PSU power supplies are turned on and off by a signal from the motherboard. They also provide a signal to the motherboard to indicate when the DC voltages are in spec, so that the computer is able to safely power up and boot.

in , , , ,

Common Email Mistakes pointed out by Experts

Email has to be one of the smartest technologies that have ever been developed on this planet. There is not a single business that can do without email technology. Clearly, there is no way you are getting around email technology. People are now using email to promote their brands and whatever their businesses have to offer. If you are able to write emails that make people want to purchase whatever you have to offer, then you should be glad that you have a skill. This is a skill that is not possessed by many people. When someone subscribes to your e-newsletters, they should be able to get the information with such tremendous ease.

There is a problem with email though. Most people do not have time to read a lot of content. As a matter of fact, most people just do not want to spend a whole day reading an email. It does not matter how excellent the content of your email is. People just do not have that time. In this day and era where the world is constantly on a fast track, there is very little time to get some things done. Sadly, there are many more mistakes that you can make with your promotional emails. These mistakes include:



Do not lie to your email recipients. The thing with deception is that it might work for a while but you will be tarnishing your business’ reputation. No one will want to read your emails. In fact, they will be deleting your emails the moment they receive them.

It is the same case with websites. There are those websites that promise steamy content- especially the gossip websites- however, the moment you open the site, you are just blown away by the shock that meets you. There is nothing amazing in that content. The title is just deceptive for no apparent reasons. Fool me once, shame on you and no one wants to be fooled a second time because we all know what they say about the second time.

It is important to remember that the reader of your email does not have time to read the whole email at once. They will have to go through the subject. It is this subject which will make them decide whether they want to read the mail or not. There is information that should not be lacking in the subject.



 How is it that you got that person’s email address? It is important to tell your recipients how you got their contacts. You do not want people thinking that you hacked into their accounts or something of the sort. One of the best ways that you can collect email addresses is to create a database. Definitely by now, you have a database for your business or website. When people subscribe to your website, their email addresses are stored in the database immediately.

Curiosity killed the cat, but then again we are not cats, so it is normal to get a bit curious. When you fail to arouse the curiosity of your readers, you can be sure that you will not get the returns you were looking for. This is why many people create deceptive subjects in order to arouse curiosity. However, there are ways that you can get the curiosity of other people easily. For instance, you could just be honest and write something catchy about the benefits your product will provide to your prospective clients.

In as much as you want to capture the attention of your prospective clients, you should give your email the correct wording. You do not want to use attention-grabbing words which will send your email straight to the spam folder. These attention grabbing words and symbols should never be put in the subject line. Using them even in the body of the email can trigger some spam filter as well. There are words like ‘sex’ and symbols like the asterisk which will capture the attention of the recipient and the spam filters as well.

There are some writing mistakes that you might make and they will land your email in the spam folder. There is always that habit of using too many exclamation marks. You will be tempted to use this in a professional email especially if you use them in your texting habits. Watch out for such simple mistakes and correct them before you send that newsletter. Another mistake that might put you in the spam folder is the use of an outdated mailing list.

There are times that people access internet. Since most people access the internet through their phones. The hours between six and nine in the morning are really good for sending your emails. The other times you can send your mail during the day include lunch time- noon to 2 PM and in the evening when people are stuck in traffic. When an email comes through in the middle of a busy day, people will not read it let alone replying.

Email is a really good way to capture the attention of prospective clients. You can increase the size of your customer base with such tremendous ease. However, you have to do the emails correctly. There are things like timing and the content of the email that you have to pay attention to. If you do not send your emails at the right time and in the right way, they are never going to be received.

Friday, July 27, 2012 in , , , , ,

Partition The Hard Drive Of Your Computer.


Partition the hard drive is one way that can be used to share the hard disk into multiple drives are recognized in all the operating system but with adjustments to the file system used. Partitioning is done so that there is no separation between files which is always running and files that are not always running. This was done because of the possibility of a single computer; there are two different operating systems. If you use a computer operating system will be installed based on open source then it should be done when the partition is the operating system will be installed. If you are Microsoft operating system users, it helps you use the latest systems, window 7. Because one of the advantages of Windows 7, is able to create disk partitions safely without using additional software eg Norton partition magic, partition manager ranish, Eazeus Partition Manager and there are still others. Here's how to partition and format the hard drive in Windows 7
*    Click the Start
*    Right click on Computer
*    Click Manage, click Disk Management continued with
*    In the middle of the bottom of the window please select the drive that has not been partitioned.
*    Right-click on the white box below the thick black line and select New Simple Volume
Click Next, it would seem clear that the hard drive capacity.
*    Then divide this hard drive into two partitions so I have to split the 2 hard drive capacity is the maximum value in Simple volume size in MB, for example 300/2 = 150 000. After that click next.
*    Next again, and click Finish

If there is a problem that caused some of the definitions are not detected while accessing the windows explorer. This is usually caused by several factors, such as the partition is less than perfect, hard disk bad sectors, partition software bug, compatibilities file system, etc. One of the free software that can be used to repair a disk partition that is hidden is a Partition Find & Mount.

Wednesday, July 18, 2012 in , , ,

Create a program with Notepad

Notepad is one of the nice subject for us. You can make a lot of program with it. You can make a lot of funny program with it. Just an example If you open your notepad then write .LOG you can get a clock program when you will on this folder then. Just for get follow this rules.

Open your Notepad > then write > .LOG > then save that file as CLOCK > after create that you can see your time and date after open that files.

Friday, June 29, 2012 in , , , , , ,

Video card

A video card is an expansion card which generates a feed of output image to a display. Most video cards offers various function such as accelerated rendering of 3D scene and 2D graphics MPEG-2/MPEG-4 decoding, TV output or the ability to connect multiple monitor. Video hardware can be integrated into the motherboard or CPU.

Monday, June 25, 2012 in , , , , , , , ,

Best sound box

Designed for small home system series the X series consist of a powerful sub woofer and small satellites This sub woofer system is ideal for home movies and music entertainment. Rich sound and powerful bass makes it the ideal choice and excellent all range performer Built with several technologies such as fine con, fine box and e Airbass. for perfect sound production. Its output power 68 watt RMS. Power distributions 14 watt x 2 + 400 watt. Frequency response 30 Hz - 20 kHz. Separation 48dB. Input sensitivity 310mV. If you want to get this High quality box, You have need to choose a Micro-lab Sound Box (Just Listen). Some models of X series are X 15, X 16, X 16.2.1.

Sunday, June 24, 2012 in , , , , ,

View your computer information

You can view a summary of important information about your computer by opening system in control panel. You can see basic hardware information such as your computer's name and which edition of windows your computer is running you can change important system setting by clicking the links in the left pane of system. If you want to know about this just follow these-
Open system by clicking the Start button > Control panel > System and maintenance > System.

Wednesday, June 20, 2012 in , , , , , , ,

Create a dummy files

Here are five ways to create a file that looks legitimate but is actually a dummy files. But why would you want to create a dummy files? Here are five reason for that:
1. Test hard drives - Detected bad sector on your hard drive by filling up free space with a dummy files.
2. Securely delete files - A deleted files can be can be recovered but by overwriting the free space with a dummy files will make it unrecoverable. 
3. Secure flash drive - Make your flash drive read only by filling up empty spaces and prevent virus infections. 
4. Test network speeds - While there are free utilities available to test network speeds, You can do so with a dummy files too.
5. Dummy files can also help you escape a deadline you have got to prepare a report or finish your by putting the blame on your faulty computer.  

Saturday, June 16, 2012 in , , , , , , , ,

Schematic


in , , , , , , , , ,

Computer control


Thursday, June 7, 2012 in , , , , , , , , , ,

How to make a hidden files?


It is too easy for everyone. You can create it easily. Just follow this rules, 
1. At first create a new folder






2. Then go to the properties



3. Click on the Change icon button



4. Select the hidden icon



5. Then press OK and then apply and OK again.
6. After hidden your files then you have need to rename it and then not save the files name just Press alt+0160 

7. After doing that you can make it easily.



N.B: Where you will save that file in there if you can not find that file then press F5. You will find that easily.

Wednesday, May 30, 2012 in , , , , , , , , ,

Win-Win Spiral Model

Boehm and Ross (1989) extended the original spiral model by including considerations related to stakeholders. The win-win spiral model uses the theory W management approach, which requires that for a project to be a success, the system’s key stakeholders must all be winners. The way to achieve this win-win condition is to use the negotiation based approach to define a number of additional steps of the normal spiral development cycle. The additional steps are the following:
• Identify next-level stakeholders.
• Identify stakeholders’ win conditions.
• Reconcile win conditions.
• Establish next-level objectives, constraints, and alternatives.
• Evaluate product and process alternatives.
• Resolve risks.
• Define the next-level of product and process, including partitions.
• Validate product and process definitions.
• Review and commit.
The advantages from a win-win spiral model is the collaborative involvement of stakeholders that results in less rework and maintenance, early exploration of alternative architecture plans, faster development, and greater stakeholder satisfaction upfront.



in , ,

Characteristics of software

software is a logical rather than a physical system element. Therefore, software has characteristics that are considerably different from those of hardware. Some of the major differences are the following:
1.software is developed or engineered, it is not manufactured.
• The concept of raw material is non existent here. It is better visualised as a process, rather than a product.
• The human element is extremely high in software development, compared to manufacturing.
• The development productivity is highly uncertain, even with standard products, varying greatly with skill of the developers.
• The development tools, techniques, standards, and procedures vary widely across and within an organisation.
• Quality problems in software development are very different from those in manufacturing. Whereas the manufacturing quality characteristics can be objectively specified and easily measured, those in the software engineering environment are rather elusive.
2. Software development presents a job shop environment.
• Here each product is custom-built and hence unique.
• It cannot be assembled from existing components.
• All the complexities of a job shop are present here.
• Human skill, the most important element in a job shop, is also the most important element in software development.
3. Time and effort for software development are hard to estimate.
• Interesting work gets done at the expense of dull work, and documentation, being a dull work, gets the least priority.
• Doing the job in a clever way tends to be a more important consideration than getting it done adequately, on time, and at reasonable cost.
• Programmers tend to be optimistic, not realistic, and their time estimates for task completion reflect this tendency.
• Programmers have trouble communicating.
4. User requirements are often not conceived well enough; therefore a piece of software undergoes many modifications before it is implemented satisfactorily.
5. There are virtually no objective standards or measures by which to evaluate the progress of software development.
6. Testing a software is extremely difficult, because even a modest-sized program can contain enough executable paths so that the process of testing each path though the program can be prohibitively expensive.
7. Software does not wear out.
• Software normally does not lose its functionality with use.
• It may lose its functionality in time, however, as the user requirements change.
• When defects are encountered, they are removed by rewriting the relevant code, not by replacing it with available code. That means that the concept of replacing the defective code by spare code is very unusual in software development.
• When defects are removed, there is likelihood that new defects are introduced.
8. Hardware has physical models to use in evaluating design decisions. Software design evaluation, on the other hand, rests on judgment and intuition.
9. Hardware, because of its physical limitations, has practical bound on complexity because every hardware design must be realised as a physical implementation. Software, on the other hand, can be highly complex while still conforming to almost any set of needs.
10. There are major differences between the management of hardware and software projects. Traditional controls for hardware projects may be counterproductive in software projects. For example, reporting percent completed in terms of Lines of Code can be highly misleading. It is now time to give a few definitions. The next section does this.

in , ,

Software Crisis.


During the late 1960s and 1970s, there was an outcry over an impending software crisis. The symptoms of such a crisis surfaced then and are present even today. The symptoms are the following:
1. Software cost has shown a rising trend, outstripping the hardware cost. Boehm (1976, 1981) indicated that since the fifties, the percentage of total cost of computation attributable to hardware has dramatically reduced and that attributable to software has correspondingly increased. Whereas software cost was only a little over 20% in the 1950’s, it was nearly 60% in the 1970’s, and about 80% in the 1980’s. Today, the computer system that we buy as ‘hardware’ has generally cost the vendor about three times as much for the software as it has for the hardware (Pressman 1992).
2. Software maintenance cost has been rising and has surpassed the development cost. Boehm (1981) has shown that the bulk of the software cost is due to its maintenance rather than its development.
3. Software is almost always delivered late and exceeds the budgeted cost, indicating time and
cost overruns.
4. It lacks transparency and is difficult to maintain.
5. Software quality is often less than adequate.
6. It often does not satisfy the customers.
7. Productivity of software people has not kept pace with the demand of their services.
8. Progress on software development is difficult to measure.
9. Very little real-world data is available on the software development process. Therefore, it has not been possible to set realistic standards.
10. How the persons work during the software development has not been properly understood. One of the earliest works that explained to a great extent the causes of software crisis is by Brooks (1972). We shall get in the next section a glimpse of the work of Brooks.



in , , ,

What is Software?


We are living in an information society where most people are engaged in activities connected with either producing or collecting data, or or gangling, processing and storing data, and retrieving and disseminating stored information, or using such information for decision making. Great developments have taken place in computer  hardware technology, but the key to make this technology useful to humans lies with the software technology. In recent years software industry is exhibiting the highest growth rate throughout the world, India being no exception. Software is the general term for information that's recorded onto some kind of medium. For example, when you go to the video store and rent or buy a tape or DVD, what you're really getting is the software that's stored on that tape or disk. Your VCR or DVD player are hardware devices that are capable of reading the software from a tape or disk and projecting it onto your TV screen, in the form of a movie. Your  computer  is a hardware device that reads software too. Most of the software on your computer  comes in the form of programs. A program consists of instructions that tell the  computer  what to do, how to behave. Just as there are thousands of albums you can buy on CD for your stereo, and thousands of movies you can buy to play on your VCR or DVD player, there are thousands of programs that you can buy to run on your  computer . When you buy a computer, you don't automatically get every program produced by every software company in the world. You usually get some programs. For example, when you buy a computer it will probably have an operating system already installed on it. If you do purchase a specific program, it would be to perform some specific task. For example, you might use a graphics program to touch up photos, or you might use a word processing program to write text. You're using your Web browser program right now to read this text. Just as there are umpteen different brands of toothpaste, there are umpteen different brands of word processing programs, graphics programs, and Web browsers.



Tuesday, May 29, 2012 in , ,

How to choose the best Sound Card?

This is the  computer  part that is in charge of processing audio data and output to the speakers. A good sound card is necessary for a  computer  to play quality music. If you are a heavy multimedia user or gamer, this is one of the  computer  parts where you need to invest in. Sound cards can be a great purchase for sound enthusiasts and hardcore gamers. They help eliminate interference and similar problems that degrade sound quality. They can also help create a more realistic 3D audio environment.


The potential sound output is also much greater, with a wider and richer frequency range. Sound cards such as the ASUS Xonar Essence STX, ASUS Xonar Essence ST and Creative Sound Baslter X-Fiwill truly deliver when it comes to overall sound quality. If you are wondering how to get the best possible sound out of your  computer , or if you want to know what the advantages of sound cards over onboard sound are, check out our learning center articles on sound cards. In this review site, you'll find side-by-side comparisons and detailed reviews of the best PCI and PCIe audio cards.

in , , , , , ,

How to change the CPU case, Monitor and Controls?


The  computer  case is a container where all the  computer  parts are assembled and contained. There are various types of cases for different type of motherboard size it is also known as form factor. How big a case is will depend on your motherboard size and the number of computer hardware you are putting in.  computer  monitor receives information from the graphics card and display them on the screen. There are mainly two types of monitor used for  computer  system, CRT and LCD monitor. CRT monitor used to be the standard for  computer  monitor. However, with the advancement in technology, LCD monitor has gradually replaced its CRT counterpart to become the choice for most  computer . The keyboard and the mouse are the only devices that allow you to interact with the  computer . Not all keyboards and mouse are made the same. Some of them are specially designed for gamer. Find out more in the keyboard quide and mouse quide.

in , ,

How to choose the best Hard drive?


Find out the various type of hard drive and which type is most suitable for your system. A hard drive is a storage place where you install and store all your programs and data. Generally, the bigger the capacity, the more data you can store. The main difference between the hard drive and  computer  RAM is that computer RAM contains only volatile data, which means all the data is lost when the power is switched off while hard drive can be used to store permanent data. These solid state drives are the ones to beat in the SSD world at the moment. The last generation SSDs were capable of 280/270MB/s but the new drives are capable of 550-500MB/s, in other words, double the speed of last generation. This equates to sub -10 second Windows load times and also sub-5 second game load times. That's blazingly fast performance with no bottleneck. Expected data speeds of 1Gb/s+ once a RAID array is set up. 

in ,

How to choose the best Graphics Card?


A gaming  computer  must have a good graphics card. This guide shows you how to find the best graphics card for your gaming  computer . As the name implies, it is a card that processes graphical data. Upon receiving instruction from the motherboard and CPU, it will process the graphical data and display them on the monitor. There is a wide range of graphics card in the market, all with different processing capability. Generally, the processing capability is proportional to the quality of the images produced on the monitor. The better the graphics card, the higher quality is the images shown. For gamer, investing in a good graphics card is a must.

in ,

How to choose the best RAM?

RAM (Random access memory),  computer  RAM is one of the most crucial components of a  computer . Without this component the  computer  speed will be crawling like a tortoise.  computer  RAM acts as a facilitation for the motherboard and the processor. Its main function is to provide a temporary space for data to be stored. When a  computer  first starts up The system will load information from the storage drive into the RAM. At any point of time when the system needs information It will just access the RAM to retrieve the data it needs.