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From Wikipedia

Conversion rate

In internet marketing, conversion rate is the ratio of visitors who convert casual content views or website visits into desired actions based on subtle or direct requests from marketers, advertisers, and content creators. If the prospect has visited a marketer's web site, examples of conversion actions might include making an online purchase or submitting a form to request additional information.

The Conversion rate is defined as follows:

\mathrm{Conversion\ rate} = \frac{\mathrm{Number\ of\ Goal \ Achievements}}{\mathrm{Visits}}

Successful conversions are interpreted differently by individual marketers, advertisers, and content creators. To online retailers, for example, a successful conversion may constitute the sale of a product to a consumer whose interest in the item was initially sparked by clicking a banner advertisement. To content creators, however, a successful conversion may refer to a membership registration, newsletter subscription, software download, or other activity that occurs due to a subtle or direct request from the content creator for the visitor to take the action.


For web sites that seek to generate offline responses, for example telephone calls or foot traffic to a store, measuring conversions can be difficult because a phone call or visitor is not automatically traced to its source, such as the Yellow Pages, website, or referral. Possible solutions include asking each caller or shopper how they heard about the business and using a toll-free number on the website that forwards to the existing line.

For web sites where the response occurs on the site itself, a Conversion funnel can be setup in a site's analytics package to track user behavior.

Methods to increase the conversion in e-commerce

Among the many methods to increase the conversion rate, these are the most relevant:

  • clear distinction of the website for a certain conversion goal (e.g. "increase sign-ins for newsletter")
  • better content (e.g. text, picture, video) of the website that clearly target versus the conversion goal
  • increase usability to reduce the barriers towards the conversion goal and thus reduce the abortion rate
  • good site navigation structure to help users find and browse without thinking too much about where to click
  • show credibility signs like third-party trust logos and good site design to increase trust level of visitor
  • use AIDA (attention, interest, desire, action) to move the user through the conversion funnel
  • use third party certification sites such as [http://www.ibcim.org IBCIM.ORG]


  • Definition of the Conversion rate [http://www.marketingterms.com/dictionary/conversion_rate/]
  • Facts about typical conversion rates and hints how to increase them [http://www.seochat.com/c/a/Website-Marketing-Help/Conversion-Rate-Optimization/]
  • Berkeley-Study on Conversion rate in Spam [http://www.icsi.berkeley.edu/pubs/networking/2008-ccs-spamalytics.pdf]

From Encyclopedia


energy in physics, the ability or capacity to do work or to produce change. Forms of energy include heat , light , sound , electricity , and chemical energy. Energy and work are measured in the same units—foot-pounds, joules, ergs, or some other, depending on the system of measurement being used. When a force acts on a body, the work performed (and the energy expended) is the product of the force and the distance over which it is exerted. Potential and Kinetic Energy Potential energy is the capacity for doing work that a body possesses because of its position or condition. For example, a stone resting on the edge of a cliff has potential energy due to its position in the earth's gravitational field. If it falls, the force of gravity (which is equal to the stone's weight; see gravitation ) will act on it until it strikes the ground; the stone's potential energy is equal to its weight times the distance it can fall. A charge in an electric field also has potential energy because of its position; a stretched spring has potential energy because of its condition. Chemical energy is a special kind of potential energy; it is the form of energy involved in chemical reactions. The chemical energy of a substance is due to the condition of the atoms of which it is made; it resides in the chemical bonds that join the atoms in compound substances (see chemical bond ). Kinetic energy is energy a body possesses because it is in motion. The kinetic energy of a body with mass m moving at a velocity v is one half the product of the mass of the body and the square of its velocity, i.e., KE = 1/2 mv2 . Even when a body appears to be at rest, its atoms and molecules are in constant motion and thus have kinetic energy. The average kinetic energy of the atoms or molecules is measured by the temperature of the body. The difference between kinetic energy and potential energy, and the conversion of one to the other, is demonstrated by the falling of a rock from a cliff, when its energy of position is changed to energy of motion. Another example is provided in the movements of a simple pendulum (see harmonic motion ). As the suspended body moves upward in its swing, its kinetic energy is continuously being changed into potential energy; the higher it goes the greater becomes the energy that it owes to its position. At the top of the swing the change from kinetic to potential energy is complete, and in the course of the downward motion that follows the potential energy is in turn converted to kinetic energy. Conversion and Conservation of Energy It is common for energy to be converted from one form to another; however, the law of conservation of energy, a fundamental law of physics, states that although energy can be changed in form it can be neither created nor destroyed (see conservation laws ). The theory of relativity shows, however, that mass and energy are equivalent and thus that one can be converted into the other. As a result, the law of conservation of energy includes both mass and energy. Many transformations of energy are of practical importance. Combustion of fuels results in the conversion of chemical energy into heat and light. In the electric storage battery chemical energy is converted to electrical energy and conversely. In the photosynthesis of starch, green plants convert light energy from the sun into chemical energy. Hydroelectric facilities convert the kinetic energy of falling water into electrical energy, which can be conveniently carried by wires to its place of use (see power, electric ). The force of a nuclear explosion results from the partial conversion of matter to energy (see nuclear energy ).

From Yahoo Answers

Question:give an example for each of the following energy conversions. 1.electrical -> heat 2. mechanical -> sound 3. chemical -> heat 4. heat -> light 5. light -> electrical chemistry homework please help, i dont get it :/ thank you :)

Answers:Energy conversion is the process of transforming energy from one form into another 1) lightbulbs! (lightbulbs releaces heat!) 2) amp/speaker 3) a good example of chemical energy is gass, gass is a good fuel because there are alot of bonds in these long chains of carbons. When you convert chemical energy to thermal energy you are basically ripping all of the bond in thoes carbon chains apart which releses energy in the form of heat 4) fire! 5) solar pannel

Question:A combustion reaction releases 117 J of heat energy. Express the quantity in Kilocalories ?

Answers:1 kilocalorie is 1000 calories and one calorie is 4.18 joules. so, 0.0279 kilocalories.

Question:I'm doing a Rube Goldberg project and I need 5 types of Energy Conversions, know of any websites?

Answers:I guess in it's basic form, there is: 1) chemical to heat to kinetic to mechanical to electrical (gas turbine) 2) heat to kinetic to mechanical to electrical (steam turbine with HRSG) With turbines, the fluid (gas) is heated under high pressure and expands through each stage of the turbine experiencing a pressure drop. The idea is for the pressure drop to increase the kinetic energy of the fluid coming out of the first stage to produce an additional amount of work for the next stage. The increase in kinetic energy is balanced by the drop in temperature of the fluid. This can go on until the lowest pressure is reached and the fluid is still in the gaseous state. 3) chemical to heat to mechanical (car engine) 4) kinetic to mechanical to electrical (wind turbine, hydro turbine) 5) electrical to heat (resistor, toaster oven) 6) solar to electrical to mechanical (solar home, solar vehicle) I'm sure there's more (nuclear energy, decomposting of biodegradable material produces chemical and heat energy, potential energy, etc.) Take a look under "Energy transformation" on Wikipedia. They also explain the inefficiencies that crop up when heat plays a role in the energy conversion. If your familiar with thermodynamics, the Carnot cycle is available to determine the highest efficiencies available during energy conversion (gas engines, turbines, heat pumps and refrigerators).

Question:what are some advantages/disadvantages what energy conversions take place, what yype of energy is the result where is it currently used/how commonly used is it

Answers:Wikipedia has great article on OTEC. No sense in copying it here. Also, become a fan of the OTE Foundation on Facebook: http://www.facebook.com/pages/Ocean-Thermal-Energy-Foundation/80861561877?ref=mf

From Youtube

Science Energy Conversion Project :Our project on Energy Conversions =)

Energy Conversion Devices on Bloomberg :This is one company I totally support. For them, and us, solar power is reality. This video features a hydrogen hybrid vehicle. What more should I say.