Distance education has many names: online learning, online education, remote learning, and eLearning. The distance learning revolution is taking us by surprise. Almost every secondary school, or college, or university, is requiring their students and online course to prepare them for future online degrees and online careers.
GemaSolar is a unique power generation plant in the world for its particular technology. It consists of thousands of mirrors that concentrate sunlight onto a small area at the top of a tower of 140 m. The collected heat is transferred into the heat transfer cabin and used to generate steam which makes this one of a kind plant to generate electricity even when the sun does not shine.
The concept of radian measure -as opposed to the degree of an angle- is normally credited to Roger Cotes in 1714. Radian is a natural measure for angles because it is a measure based of the radius of of a unit circles, as many other trigonometric functions are.
Some seemingly simple concepts need strong mathematical justification in order to belong to the foundations of mathematics; the concept of ordered pair is one of them. Ordered pairs are needed when we graph mathematical functions to see the visual behavior of them. Plotting graphs in the Cartesian coordinate system is used and needed in almost every branch of science. What are ordered pairs, and is its relation with the theory of sets?
The human body is not only a marvelous machine, it is also a marvelous example of geometrical anatomical proportions. There are many ways in which human measures are surprisingly the same, or a integer multiples of one to another. Why is it that we can be framed into a square, as Leonardo da Vinci, and the ancient Roman architect Vitruvius showed through some historically famous drawings?
Remembering passwords is a great deal of mental work for almost everybody. Passwords must be different from one account to the other; the password you use for an Email account should not be the same for a bank account. So, how can we keep in mind the different passwords? The answer is really simple; unexpectedly simple!
The Cartesian coordinate system is a marvelous tool for plotting equations. The graph we obtain tell us a lot about the behavior of the function being graphed. The simplest equation we can graph is the equation of the straight line, but since it can assume many orientations, we call it a family of straight lines.
Small numbers are easy to read; for example, 456 is easily spelled as: four hundred and fifty-six. But confusion arises when we have billions, trillion, quadrillions, etc. Some numbers are so big that they don't have names at all, but only exclamation expressions. A Googol! is an exclamation expression for a big, big number. But what number is this and what is its relation with Google, the all familiar name of the search engine giant?
In the introductory computer courses --from intermediate schools up to college and online courses-- one of the main topics to be covered is the mathematics of binary arithmetic. The binary arithmetic is a somewhat esoteric topic because in binary arithmetic everything is done with ones and ceros. The fundamental properties of binary addition are: 0 + 0 = 0, 1 + 0 = 1, and 1 + 1 = 10; why?
Mathematics is the science of logic, however, it's full of illogical ideas. And nothing more "illogical" than the concept of infinity. Trying to put into our minds this immense concept is not easy, but some have done it.
We use to take the fractions for granted, we do not question the negative numbers. Even the irrational numbers seem "reasonable" for us. However, the sole mention of "imaginary numbers" appears to be a crazy idea.