Similarities Between the Computer and the Brain

Have you ever realized that the brain and a computer have nearly similar functions? For example, if you download something to your computer, it is just the same as the brain downloading new information during lessons in class. The same thing goes with uploading a file or an image from the computer to the internet; your brain does the same thing by uploading something you learned in class and projecting it onto a piece of paper. For example, your brain downloads an image when you see something, and then uploads it by you drawing a picture of something you have seen. Of course even the world’s most powerful supercomputer cannot rival a human brain, but these are some examples of the similarities between man and machine that can be identified. Probably in the future, where humans have developed some high technology will they be able to create near-human computers.

Here are some other similarities between the computer and the brain:

Functions and Purpose

Both are used for storage of information, to process information and to run tasks.

Functions: Both are used for mathematical calculations, carrying out complex algorithms and to storing of crucial information.

Role in society

Both play extremely important roles in society, commerce, entertainment and science

Every single living creature survives by quick thinking and reflexes, that includes us. The computer today plays the most important roles from specialized systems controlling entire production factories to little “fuzzy logic” chips in washing machines that intelligently monitor the washing process.

Combining components

Both work by combining the processes of several components and parts to perform their tasks.

A computer consists of many parts, including a motherboard (which is also made of several components), the disk drives, the processor, graphic cards and many more… all of which has its own roles in the computer’s processes.

Like a computer, the brain is formed out of parts. Besides having the left and right brain, there are also parts of the brain that take care of emotions, mathematical calculations, body co-ordinations and many other tasks needed for our daily activities.

Electrical signals

Both work by transmitting “logic signals” to each of their parts. Signals are both electrical

i.e. A computer works by using binary (“on”/”off” logical signals known as “bits”, put together as “bytes” to represent data.) To communicate internally between components, represent information and store data.

In a way, neurons in the brain are either “on” or “off” by either firing an action potential or not firing an action potential.

Memory capacity

Both can increase their memory storage capacity.

Computer memory grows by adding computer chips/external hard drives/ pre-installed hard drives. Memories in the brain grow by stronger synaptic connections.

Self-maintenance

Both computers and brain have repair and “backup” systems.

The brain has “built-in back up systems” in some cases. If one pathway in the brain is damaged, there is often another pathway that will take over this function of the damaged pathway.Similar to a computer, where backup files can be stored in the computer.

Degrading with time

Both can degrade. Computers break down and brain cells deteriorate

Like all machines, computers break down with time. Brain cells deteriorate with age, losing their functions and slowing down because of lower counts of chemicals and hormones in the body.

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Source by Yousef Sabqi

Computer Rental Rates

Computer rental rates differ from company to company and region to region. Despite that, the margin of fluctuation is very small, keeping in mind the severe competition that exists in the computer rental market.

Rental rates are calculated on a time basis: per hour, per day and per month. Short-term rentals are always more expensive in comparison with long-term rentals. If a PII 400 MHz processor can be rented for $5 for an hour, the same would cost $100 for a day. Hence, it makes better sense to use a rented computer for a longer period in a single day than in small intervals everyday. However, if one has a very short term need, then it is better to rent for just a couple of hours as required.

Companies quote their rental rates based on the specifications required. Rental rates also include servicing, if any is required. It is also inclusive of installation of operating systems and other software. Audio-visual enhancements also count. Peripherals such as keyboard and mouse are included in the rate. Rental rates of newer equipment are higher, while the rate decreases as the equipment begins to grow older.

Laptops are more expensive to rent than desktop computers. In fact, laptops are rented at nearly double the rates of desktops. A PIV processor 256 MB fourteen inch laptop with a 30 GB memory might be available at $30 per day from some companies.

However, there is tremendous competition in the market of rental computers. Companies provide various incentives to lure customers. There are also lowest-rate guarantee schemes, where the companies lower their rates if the customer finds another company with a lower rate. Warranties are included with the rentals. Also, companies provide free equipment when a large number is ordered. Generally a spare computer is provided when bulk orders are placed for seminars, trade fairs, training programs, etc.

Computer rental rates do not include the shipping charges. However, some companies do provide free shipping as an incentive. As the rates of computers themselves are going down, the rental rates are also bound to decrease.



Source by Eric Morris

Benefits of Taking Computer Courses

Studying computers is increasingly becoming important in this age of technological advancement. Upon leaving school, pupils will most certainly end up in a technologically rich workplace, where their computer skills will be tested. Therefore, it should be every parent’s responsibility to make sure his or her child has basic knowledge in using the computer at the earliest time possible. Furthermore, when the children are of age, they should consider enrolling them in a reputable computer class. Computer classes help to effectively equip learners, right from primary to graduate school, with the necessary skills and knowledge required to use a computer. The benefits of enrolling in a computer class include:

· Personal enrichment

Computer courses help to enrich students for both educational and professional advancement. Typically, students are expected to undertake their research on the World Wide Web, complete their assignment online and use PowerPoint presentation in class discussions. Therefore, students who have weak computer literacy skills often lag behind, while students who possess the necessary skills required to engage computer technology tend to perform better in class. Their knowledge in using computers tends to build their self-esteem, encouraging them to better themselves in other subjects. Furthermore, students who qualify for the workplace are expected to be productive on-the-job by using time-saving resources, such as computers. In fact, knowledge in basic software programs is a key requirement for most white-collar jobs, right from the entry level.

· Improve efficiency

Computers are required in most facets of organizations. There are many tools and programs available on computers, including spreadsheets, graphic creation software and word processors required to improve work efficiency. Good knowledge on how to use these tools can play a critical role in making an employee efficient. Furthermore, to remain competitive for any career opportunities, advanced knowledge in the use of computers is essential.

· Collaboration & communication

Students who have a good working knowledge of computer tools and working online are able to work more effectively with their peers in school projects. Furthermore, electronic knowledge, including email and social networking (through Facebook, Twitter, etc) are important in any modern society. Therefore, students who lack these skills may not be able to fit in with the rest. Moreover, using Local Area Network (LAN) and email to communicate (i.e. sending memos and notice) are common office standards. Therefore, it is critical for every employee to know how to use up-to-date technology and multiple modes of communication at the workplace.



Source by Mkamba M Juke

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5 Things You Can Do To Avoid Computer Repair Problems

We somewhat take our computers, laptops, and other such devices for granted, but these are just like any other electronics and sooner or later develop some sort of issues, which require repair.

In many cases, the nature of the problem may be small, but you need to get it right before it turns into a bigger problem. However, you can apply a number of easy techniques to avoid computer repair problems in future.

Let’s check out a few tips that can help you to stay ahead in maintaining your computer or other similar devices.

  • Make A List Of The Symptoms

When your PC starts showing any kind of operational issues, you will be appeared with particular error messages. These error message should be composed alongside alternate symptoms and disappointments confronted by you.

You may not be able to figure out the correct nature and reason of the PC problem because of their technical nature, yet when you catch these points of interest in a detailed and thorough way, then it will help the expert to recognise and take care of the issue rapidly. So you should observe the PC issue and note it down properly.

  • Get The Telephone Services

Sometimes it is impractical to visit a PC repair shop because of its far location or because of your busy work routine. So you have to investigate the remote consultation services that offer help to repair the PC. You can get the numbers from the official website of the company.

  • Make Notes The Repair Process

When you are giving over your PC to the onsite computer repairs centre, you should make a point to gather reports from the organisation specifying the particular PC equipment or programming that should be replaced alongside the correct time needed to repair the PC. It is likewise vital to approach the organisation for post repair guarantee. This basic documentation technique will help you to save some extra costs or charges.

  • Prepare The Computer For Repairing

Before you choose to give the PC for repair, you need to backup all the critical data on the PC including serial number of the PC hard disk, modem’s serial number, and serial number CD-ROM and different parts of the computer.

When you get the PC from the computer repairs and fix centre then these details will help in verifying your computer. Further, you have to delete a wide range of personal and classified information from the PC before giving it for repair.

  • Talk About Exchanging The PC At A Discounted Price

If you have one of the older models of the PC, the PC parts needed may not be available because of the model being out of production or guarantee period. In such cases, you can consider the exchange offers available to replace the current PC with another one by paying a discounted amount. There are no particular rates of exchange, so you need to negotiate with the buyer and see what you can get in return.



Source by Michael Clark

A Brief History of Computer Based Training

Computer Based Training or CBT is now widely adopted in education, corporate training for learning any subject from math, history to sales skill, customer support and project management. The driving force behind the maturity of CBT industry, however, has been aviation industry.

In the 1980’s, Computer based training and simulation were introduced to pilot training programs to reduce the training cost and avoid the safety issue in on-site training. The Aviation Industry Computer-Based Training Committee (AICC), an international association of technology-based training professionals, oversees and develops guidelines for aviation industry in the design, implementation, delivery, and evaluation of CBT.

In the early 90’s, CBT had made its way into educational institutes and corporate market. These instructional manuals were text based and often taught the user how to complete particular lessons. Unfortunately, computers were still progressing at that time, which made it difficult to add into classrooms. At the time, teachers still did not agree with using strictly based CBT programs. While this was a great way to learn topics without having to be rushed, the technology fell short. It wasn’t until the later years that full multimedia, which included audio and video, was integrated into these lessons. From there, computer based training only got more popular.

As technology progressed, computer based training courses were also getting better. By the late 90’s, CBT was full of video, streaming audio, and a wide array of topics. This type of computer based training was picked up by universities worldwide. This is when online courses began to take full form. Universities provided online classes to those who just couldn’t attend real courses. Filled with video lectures and practice exams, students were able to work at their own pace. Although this sounded like a tough idea, students loved the invention. It not only allowed the already employed to get more education, but it helped those with learning disabilities work on their own time.

CBT has gone far beyond the minds of college students. Amazingly, it has also reached aviation training. Computer based training now allows potential pilots to use simulated airfare and courses designed to help them understand the concepts involved. Due to the fact that many people prefer learning in a quiet environment, so that they can review frequently, CBT has become widely popular among aviation schools. These computer programs also teach aviation supplies information, and other necessities. As a result, pilots can fly easily with their david clark headsets, knowing that they know everything about aircraft supplies.

Although CBT is still controversial, most universities and aviation schools have accepted the new form of learning. With students having specific learning disabilities, and tough schedules, this type of e-learning helps everyone get a great education. It is possible to do achieve more when convenience and flexibility is present. You no longer have to worry about getting to campus on time, or juggling three jobs with an array of different courses. Even aviation pilots can dream of educational freedom, if it means spending extra hours at home studying the latest aviation supplies. For the majority of learners, computer based training has allowed society to open their minds to schooling. Students no longer have to worry about getting behind. CBT makes it possible, no matter what level you are at.



Source by Natalie Aranda

The Advantages and Disadvantages of Computer Rental

PC Rental is an option that is quickly catching on in popularity, but is renting your computer equipment really worth it? By taking a brief look at the pros and cons of PC Rental you can decide whether renting a computer is more helpful to you than owning a computer outright. Much of your decision-making process will depend on things like how much you use your computer; what you use your computer for; what sort of software you use as well as what you expect from your computer equipment.

The Advantages of Renting a PC

When you choose PC rental there are some advantages that come to mind. First and foremost, you don’t have to have to pay a large sum of money up front. Of course many computer stores offer lines of credit to finance your computer, but for those who do not have a high credit rating, this option might not be available. So if you don’t have a lot of extra money to use to buy a new computer, you may want to consider PC Rental.

Secondly, for the same standard price, most computer rental stores will give you the option to rent a desktop computer, gaming pc or tablet computer instead of charging outrageous amounts of money for the more portable or flexible models. So no matter if you want an all in one PC or a desktop PC or a tablet PC, you won’t have to worry about large monthly payments and their attached finance charges that are typical of so many credit lines.

Another plus side of PC rental is that you don’t have to worry about any of the upkeep or maintenance of your computer. Unlike owning a computer, a rented computer does not ask you to pay for upgrades, or security software, service fees or other basic services. All of this comes standard with PC rental and can save you hundreds of dollars a year.

Another good point is that most PC rentals come with computer accessories and the computer components that manufacturers usually install standard on their computers; no extra charges.

The Disadvantages of Renting a PC

PC Rental also has its disadvantages. These include the fact that you do not own your computer equipment. No matter how much you like it, you do not own it. While some computer rental stores give you the option to buy your computer after renting for a certain length of time, if you are looking to buy a computer, purchasing one through your PC rental store may actually cost you more money in the long run than it would have to purchase the equipment new.

Something else to keep in mind is that if you stop paying your rental payments, the PC rental company will come re-claim their property fairly quickly. This means that you need to stay on top of your monthly payments if you wish to keep using the equipment.

Finally, rented PC’s tend not to have the variety of components, software and other equipment that new computer models have. They may run a bit behind the times in their software or operating speeds. Of course if you are just browsing the Internet or using it to check email or do homework then this is not a problem. However, if you are looking for a gaming computer, or something that is up to the minute, you may have a hard time with a rental PC, so check PC World to see if the lines of computers offered by your rental company are the kinds of computers you are looking for.

What PC Rental Means for You

Depending on your needs, renting a computer can mean a tremendous savings to your personal or business finances. By not having to pay cash down or large monthly finance charges you can actually save yourself a good deal of money, but again, depending on your needs, PC Rental is not for you, which is why you should always do your homework before making a decision.



Source by Justin C Leong

All About Computer Networks

Over a period of time, computers have become an indispensable part of businesses. Installation of computers, their support and maintenance are services all organizations require. As businesses grow, the number of computers in the organization also increase. It becomes imperative to establish a systematic way to connect these computers so that they function in a hassle-free manner. Therefore, computers are interconnected in various ways. This is the concept of a computer network.

What is a computer network?

A computer network can be understood as a number of computers connected together to share resources. The most common resource shared is the internet. Other resources can be printers, file servers, etc. The computers in the network may be connected through an Ethernet cable or wirelessly through radio waves.

Now we will see how the individual computers in a network are connected:

Computers connected in a network are referred to as nodes.

Star Topology:

In this case, there is a central node from which connections are provided to individual computers. In this case, even if there is any problem with a particular cable, the other computers can continue to function undisturbed. On the flipside, this type of connection requires a lot of cabling.

Bus Topology:

In this case, all the computers are connected by a single cable. The information that is intended for the last computer needs to travel through all the nodes. The chief benefit is that it requires minimal cabling. However, if there is any fault in the cable, all the computers are affected.

Ring Topology:

In this topology, all the computers are connected through a single cable. The end nodes are also connected to each other. The signal circulates through the network to reach the intended recipient. In case, a network node is configured incorrectly or there is some other issue, the signal will make numerous attempts to find the intended recipient.

Collapsed Ring Topology:

In this case, the central node is a network device known as the hub, router or switch. This device runs in a ring featuring plugins for cables. And, each computer is independently connected to the device through individual cables.

Each organization chooses its own topology of the computer network to ensure a streamlined functioning of their computers. Once the computers are connected, offices also have separate cabling closets, which is essentially a space containing a switch device that connects to the network.

There are a number of computer network companies that provide the services of installation, maintenance, and support services ensuring smooth and streamlined functioning of your systems.



Source by Kanika Saxena

Computer Cookies: Are They Good or Bad?

Explaining “Cookies” (the non caloric ones that reside in your computer!)

You can’t talk about all those nasty ‘things’ that can ‘attack’ your computer while you are surfing the Internet, like viruses or spyware, without talking about ‘Cookies’. But what are they and are they really bad for my computer?

Ok, first let’s define the term, and then we’ll explain the good and the bad about it.

Cookie(s):

A small data (text and numbers) file (piece of information) created by a Web server (large computer that stores web sites) that is stored on your computer either temporarily for that session only (the time that you spend on a web site) or permanently on the hard disk (persistent cookie). Cookies provide a way for the Web site that you visit and go back to visit again, to identify users and keep track of their preferences. Amazon and Barnes and Noble online are very creative in the use of their cookies that get generated when you visit.

Here’s an example from my computer from visiting the Disney.com website:

CP null*disneyworld.disney.go.com/1088 1761935360 30785590 403215680 29726670*

Notice that the only thing in that string of text and numbers that you can recognize is the name of the website. The rest of the information is simply a set of numbers that only a computer can understand.

Why are cookies important to you? Well, you would not be able to browse through the Web as you are currently used to if you had cookies restricted on your computer.

The Good “Cookies” (non calorie type)

Cookies are commonly used to “maintain the state” (the current or last-known status) of the session (time that you spend on a site) as a user browses around on the site. For example, if you filled out a form and decided to leave that for a moment to view another page, when you come back to that form, the information that you already filled in would still be there. Without cookies, the site would not know who you were.

On the 2 web sites that I mentioned, Amazon and Barnes and Noble, they both use a combination of cookies and online database to recognize you when you return to the site as well as “remember” your earlier choices and from those choices recommend possible book or music choices for you on your current visit.

Imagine, if you will, walking into a local Barnes and Noble store where a clerk immediately recognizes you, walks up to you as she calls you by name and walks you over to your own table of books and music. You see that they have put all of your favorite kinds of books and musicians on the table, both new and old works, all laid out for your quick viewing pleasure!

And, on the next table, is a sign saying “Other people who bought these items also purchased these items” so that you may find interesting items that you may never have seen but might find interesting. Wouldn’t that make shopping a great experience?

Well, that is exactly what it is like to shop online with a sophisticated shopping web site like Barnes and Noble and Amazon! And it’s only because of cookies remembering who you are that allows this type of service to occur.

The Bad Side of Cookies

Actually, as you have just seen, cookies on your computer are not a bad thing; it’s just that the information that they contain can be quite enticing to unscrupulous people. Quite a bit of personal data may reside in the cookie files in your computer, such as ID and Password information. As a result, this storehouse of private information is sometimes the object of attack, which is what happens with some types of spyware.

The default (Default refers to a value automatically assigned to a computer program or device), settings in your Web browser typically allow “first-party” cookies that do not contain any personal information, but not “third-party” cookies.

First-party cookies are ones that are created by the Web site you are visiting. Third-party cookies are created by a Web site other than the one you are currently visiting; for example, by a third-party advertiser on that site (pop-up or banner). The purpose of such cookies is usually to track your surfing habits, which is why third-party cookies are considered an invasion of privacy and riskier than first-party cookies. In some instances cookies are used to consolidate and track user behavior across different sites, which provide marketers with private information about you without your knowledge. These are what are referred to as Tracking Cookies.

Aha, now we’re getting somewhere!

Because, a Tracking Cookie is a somewhat new term for a cookie that has been design by the above mentioned ‘unscrupulous’ people that do business on the Web. It is part of the unfortunate phenomenon known as Spyware! But, that’s a topic for another whole article!



Source by Deborah Baird

Why Do Viruses Slow Down Computers?

Most people have virus protection installed on their computers. This is a great thing! Many of the virus protection programs around today protect computers against spyware and adware and all other known types of malware as well as viruses. This, too, is a great thing!

The word malware is the quick substitute word for the term “malicious software.” It refers to any type of virus or spyware that can get into your computer. Some years ago, the only kind of malware we had to deal with were computer viruses. The job of a computer virus was always to annoy computer operators to one extent or another.

A Nuisance and a Threat

Some viruses were simply written as jokes. A computer geek may actually write such a script to entertain himself. On the other hand, the purpose of a computer virus may be to kill your computer forever! Even worse the goal of a virus might be to shut down a large network of computers. This would usually be referred to as cyber-terrorism.

Spyware are closely aligned with viruses. The subtle difference is a person who writes a virus is out to do your computer harm. A person who writes spyware is usually out to steal your passwords, banking account numbers and the like. If he does harm to your computer’s operating system while doing so; oh well.

Stealing Your Power

Viruses and spyware slow down computers because they use the computer’s resources to do whatever it is they are doing. They are computer programs. Like all computer programs, some of them run on XP, some on Windows Vista, etc.

Unlike normal programs, they don’t have an icon on your desktop so you can start it up if you chose to. Viruses run on their own terms. You don’t have an option to shut them down either. Many viruses replicate themselves. So, if one computer virus program steals some of your resources, 50 of them, which could be one virus that has replicated itself 50 times, might put you out of business altogether.

Ubiquitous Spyware

I’ve seen spyware make computers unusable as well. Spyware by itself doesn’t replicate itself. However, it is not unheard of to find a spyware-unprotected PC with more than 1,000 spyware infections. With this much spyware present on a hard drive, the operating system will have all it can do to try to accommodate them. In a situation like this, you probably wouldn’t be able to start any of you programs, like Word or IE, for instance.

The bottom line is viruses and spyware have the capability of keeping your operating system and microprocessor busy to the point you will not get any response from your computer or at best, a very slow response. So, it is very important to keep your computer free of these things. I recommend using a good virus protection program that cleans out all types of spyware as well.

It is also very wise to have a registry cleaner on hand as well. From what I’ve seen, registry corruption has slowed down more computers than anything else. There is nothing malicious about it. It simply occurs from normal use and tends to make computers very sluggish.



Source by Edward Lathrop