Online Learning Site

Archive for April, 2011

Electricity is produced in different ways from different sources. The most common sources are friction (static), heat (thermocouple), light (photo cell or solar cell), pressure (crystals), magnetism (generators) and chemical action (battery).

1. Static electricity is produced by friction. In friction, electrons in an insulator can be separated by rubbing to produce opposite charges that remain in the dielectric.

2. Heat energy is converted into electrical energy through the use of a device called thermocouple. It is a device consisting of two dissimilar metal wires twisted together at one end but open at the opposite end. When the joined end is heated, it produces a low DC voltage at the open end. The voltage produced by this device is directly proportional to the temperature of the metal wires. To produce a higher voltage, a number of thermocouples may be joined together.

3. Photoelectric matter. Some materials are photoelectric, which means that they can emit electrons when light strikes the surface.

A device called photovoltaic cell or photo cell is made of a vacuum tube with two electrodes. One electrode is coated with sensitive materials such as cesium or selenium which give off electrons when illuminated. These electrons strike the other electrode which in turn, collects the electrons. If the tube is combined with a fixed voltage source, there will be electron flow in the circuit and this will activate photoelectric devices such as television cameral tubes, phototransistors, alarm systems and photoelectric cells.

4. Pressure (crystals). Certain crystals such as quartz crystal is applied to produce the voltage needed to establish operating frequencies for radio and TV sets.

5. Magnetism. Any moving charge has an associated magnetic field and any changing magnetic field can produce current. A motor is an example of how current reacts to a magnetic field to produce motion. If the rotary motion results from the conversion of electrical energy into mechanical energy, the process can be reversed to change mechanical energy into electrical energy. This is done by using an electric generator, which produces voltage by means of a conductor rotating in a magnetic field.

When large quantities of electric power are needed, electric generators in big power plants get their mechanical energy from the following:

A. water or hydroelectric power

B. steam/turbine power (includes fossil, carbon, nuclear, and geothermal powers;)

C. engine power (which makes use of diesel or gasoline); and

D. wind power from windmills.

6. Batteries. A battery is made up of several individual cells wired together to produce a bigger amount of energy. Batteries are categorized into wet and dry cells.

Find more related Electrical Engineering articles from search form.

Advertising and its Impact on Society Everywhere you look, whether it is on television, magazines, the internet or billboards, there are dozens of products or services that are pushed onto consumers.

         In recent times, the word ‘Advertising’ has become a fiercely mooted topic. Advertising has positive as well as negative, social and economic impacts on our society. Advertising can have adverse effects on the minds of the people who see it. In an advertisement the company is showing only the advantages of its products or services.  
         This entails a certain amount of dissatisfaction and unhappiness in the lives of the viewers, because their self-esteem faces an attack as they are unable to use the product and do not manage to look like the slim model on the advertisement.

          According to advertisers, they state that people are capable enough to set their mind and no one can force them to buy anything which they dislike or which they think is not a necessity. Advertisers also think that there are positive impacts of advertising on our society and culture. For example, it can be used to generate awareness among the public that which product is OK or to which they should say NO. In other words, advertising also acts as an educator in the sense that it educates people what is good and what is bad for them and puts a ceiling on the harmful products like smoking and drinking etc.

      There are not only social benefits of advertising, but it also has some economic advantages. Without advertising, the media, including newspapers, television and radio would never be much strong. advertising provides revenue for commercial mediums which would otherwise need to be funded by the actual consumer of these mediums. So, we can see a major economic infrastructure based around advertising, in which the big companies fund and subsidize the commercial media by the way of advertisements.

       The major economic negative aspect of advertising is that it boosts the price of goods and services. The source of this contention is that, when organizations subsidize the mass media with advertising, we, the purchaser, subsidize advertising by compensating a grossly increased price for heavily advertised goods and services. An easy example of this is that a box of nirma washing powder generally costs around 10 to 12 rupees while the market price of the product would be 20 to 25 rupees. The fact behind this is that the remaining proportion goes in heavy advertising in television and print media.

     Nobody can get customers only by advertising. Advertisements should basically motivate the customers to buy the products by catching their attention. However, if the product is not liked by the customer, he doesn’t come back for it a second time. This definitely requires a creative marketing approach. 

   
     So, the impact of advertising on our society is in a jumble form, depending on the functions and implementations of numerous campaigns. Our society and the marketing of products depend very badly upon advertising. The companies have become much dependent of advertising that even its negative impacts can never outweigh the many positive social and economic effects.

Find more related Advertisment articles from search form.

Engaging in pay-per-click (PPC) advertising has its own benefits and drawbacks. But what exactly is PPC advertising and what it can do to your business?

Business nowadays is doing different kinds of austerity measures when it comes to advertising their products and services. This is because of high rates of placing ads on print and on television. But there is a fast growing approach that businessmen can utilize to bring their services closer to the people and that is through Internet Marketing.

One tool that is causing internet marketing popularity is PPC advertising. This is a technique used in search engine marketing that requires one to pay a fee every time someone clicks an ad on your website. Usually this placement is done through a bidding process. If you are a top bidder for your keywords/phrases, you are sure to be on the number one spot on all search engines.

Just be sure of the effectiveness of your ad copy to get the most number of clicks you need for your business. 
Here are the benefits of PPC advertising are:

1. You need not be a genius in computer and technology to be able to run this ad campaign.

2. Immediate results are seen after a few days

.3. No need to make a website conform to the SEO rules.

4. Nothing to lose even if you do not top the pages of different search engines. You can still always choose PPC advertising.

5. You can make use any search engine available.6. You can type in any keyword you like.

Cons of PPC advertising includes:

1. Fixed payments every month to the search engine you choose.

2. Pay for each click received by your website. At times, visitors are just competitors or people playing pranks on search engines. This hassle wastes money you put in to this advertising.

3. Inability to pay for the fees next month would mean removal of your website on the paid listings.

4. This advertising can only be used temporarily because it is difficult to handle in the long run.

5. Pay-per-click pricing can be costly for long periods of time, therefore, this should be stopped after an ad campaign.

But how exactly PPC advertising can increase traffic, leads and sales?

PRE-QUALIFIED TRAFFIC.—- All visitors of your website are already considered as a qualified consumer or buyer of your product. PPC advertising leads your customers to you for a lesser cost.
INSTANT EXPOSURE, IMMEDIATE PROFITS.— PPC search engines enable you to get your desired results fast. They will have your website live within just a few hours which means immediate increase in sale.
CONSISTENT TOP LISTINGS.— This is to get your website on top of the sponsored search results for free. You just have to choose the keywords related to your site and business and place them within your web pages. After this, you are done.

PPC advertising enables advertisers to control their advertising campaigns. Advertisers have effectively targeted their audience and set their own price per click. PPC advertising networks provide the platform to identify the desired audience by geographic setting, topic and industry.  These networks have a list of websites of the publishers where the ads will be placed.

Tools are provided by the networks to check how the pay per click limit is working for a certain advertiser. If its still competitive, would it be even listed among the paid search lists or does it generate sales? Of course, if the advertiser made the highest bid, the better chances the ad will be seen in the search engine. These networks too provide protection for the advertisers against click fraud. This advertising set-up allows advertisers to set a daily budget for his ads, thus, less spending for unnecessary clicks. Advertiser will never go over his budget.  
In PPC advertising, what are important are the keywords and phrases. You have to select at least ten “very specific” keywords that would give you the best traffic in the search. Then, write the ad creatively but straightforward. Tell the truth about your product or service and do not lie. Good thing if your product or service will not disappoint those that are relying on your ad’s promise – but what if it did otherwise? Important too is the clarity of the ad. Do not use very vague languages. Include important details like the price.

You should also remember to budget your bids. Do not go overbidding because you will only lose your money and do not go so low that your ads will never get the chance to show up. Check your profit against your spending. If you see no progress then most likely you have to drop your ad campaign.   More and more advertisers have been using PPC advertising and it will continue to grow faster than any online advertising techniques. From revenues of .6 billion in 2004 to .5 billion in 2009, cost per click will dramatically go up as well from .29 to .36.

PPC advertising is new in online marketing and it is going to continue in the years to come. For advertisers, this means increase revenues with fewer advertising expenses, savings, more sales, good return of investment (ROI) and effective ad campaigns in the days to come.

Find more related Advertisment articles from search form.

by aaron schmidt

Online Distance Learning has already established itself as a convenient and cost-friendly method of studying. The profiles of Online Distance Learning Education students now go beyond stay-at-home parents, employed individuals, and physically disabled. Today, even fresh high school graduates consider Online Distance Learning Programs instead of attending traditional classes from colleges and universities.

A popular advantage of Online Distance Learning is the student’s prerogative to choose a schedule. However, individuals who are looking into Online Distance Learning Education should know that there are two types of Online Distance Learning Programs in terms of interaction. These are Synchronous Distance Learning and Asynchronous Distance Learning.

In Synchronous Distance Learning, there is a set schedule for students to log on and interact with instructors and fellow students. It could be once a week or more depending on the agreed-upon schedule. In this Online Distance Learning set up, both the professor and the student are in different places but they are online at the same time. Classes are conducted through video conferencing, livestreaming, group chats and phone calls.

On the other hand, in an Asynchronous Distance Learning, the student and the professor are also in different places but they interact in different times. This arrangement offers a more lenient Online Distance Learning Education because students can log on at a time convenient to them. Likewise, instructors can prepare their lectures on their free hours. Online Distance Learning Programs using this set-up usually depend on pre-recorded lectures, email messages, message boards and even traditional snail mails.

To determine which one is good for you, consider the schedule you have and your learning preference. If you are free to log on to your computer anytime, you can go for Synchronous Online Distance Learning. Additionally, it is the better choice for people who prefer heavy interaction and structured courses. However, if you have a challenging schedule or you are always on the go, Asynchronous Distance Learning would work well. It is also for students who are self-motivated and can finish their assignments without much supervision.

Find out if Online Distance Learning Education is for you by checking out ici.net.au. Our website offers complete information on several Online Distance Learning Programs, as well as a guide on Online Distance Learning.