The material that is being used in construction of building is called as concrete. It is a hard substance usually made from different types of sand or other components that are bonded together with the mixture of water and cement. Cement and aggregates forms part of the concrete. Aggregate may be the combination of sand, gravel, crushed stone, ashes, slag, burned clay, etc., Fine aggregate is used in making smooth concrete surfaces and coarse aggregate […]

A man named Wallace Flint recommended an automated retail system in the year 1932 but it was not a successful invention. Bar codes were originally invented to support grocery shops towards tracking the inventory. Bar code can be defined as a method of automatic identification and data collection. Bernard Silver was a student at Drexel Institute of Technology. A food chain supplier requested the institute to research on automatic product reading method.  Bernard Silver joined […]

Barbed wire is also referred to as barb wire. It is a type of fencing wire used for constructing practical barriers and made life simpler for farmers. Before its inventions, farmers constantly struggled with creating boundaries for their farms and managing their cattle. This fencing wire contains sharp points and edges located at equal intervals. Barbed wire can be used to construct fences at low cost and top walls surrounding the secured property. Lucien B. […]

Alphabets have been originated from ancient Egypt and the history of the origin can be traced from 2700 BC.  The alphabets were referred to as Uni-literals by Egyptians who developed a set of 24 hieroglyphs. These alphabets begin with a consonant sound followed by the vowel sound. Modern alphabets were derived from the idea developed by ancient Egyptians. But the pictures were simplified to represent the sounds of consonants. These pictures were simplified by Phoenicians. […]

Constellation Aries is found between Taurus and Pisces. When did this begin no one exactly knows. But the Greeks are widely believed to have put the vernal equinox in the constellation. Constellation Aries according to Greek mythology The most popular story about how Constellation Aries began is that of Phrinux and Helle.  Athamas, king of Poitia, and his wife Nephele had a son and daughter. The son was named Phrixus, the daughter Helle. Years later […]

In astrology Gemini people are difficult to pin down. They are very creative and mysterious. The only downside is, what they like today they would end up hating tomorrow. Clusters of  Gemini Gemini means “twins” in Latin. It is a constellation named after the twins Castor and Pollux in Greek mythology. The constellation is found between Taurus and Cancer. To its north are Lynx and Auriga, to the south Monoceros and Canis Minor.  Constellation Gemini […]

Sagittarius contains a number of dazzling nebulae. Seen through a telescope, Sagittarius looks like a universe of light. In Latin Sagittarius means “the archer.” The constellation is associated with a centaur drawing a bow.  Sagittarius is found in Capricorn to the east and Ophiuchus to the west. One of Sagittarius’s most spectral sights is the Lagoon Nebula (M8). It is considered a diffuse nebula: In the sky they look like scattered gold dusts.   Lagoon Nebula […]

Stars fascinate people all the time. Ancient and old civilizations have different ways of looking at stars. Some viewed stars as signs, some as other worlds. Farmers, poets, seafarers took the stars as reminders of good and bad luck. Ancient land and sea wanderers used the stars as memory aids so they would not be lost. On the other hand, farmers read the stars to prepare for a good or bad harvest. This lead to […]

Constellation Leo is very easy to spot in the night sky. In spring it takes up much space in the northern hemisphere. In autumn Leo runs to the southern hemisphere. Leo is the fifth zodiac sign, but is  the most visible of all. How do you know you are looking at Leo? You are supposed to see a crouching lion that looks to the west. You should see the head and mane clearly, above which […]

This is the quadratic formula:  x1,2=(-b/2a) ± (1/2a)(b2-4ac)1/2 It is said the quadratic formula has been used and known by man for thousands of years. The equation has changed a number of times, too. Some 2000 years ago, the Chinese, Babylonians, and Egyptians already knew the area of a square  levels with the length of its sides. Using bales of hay, they figured they could stack nine bales more if the roof space were three […]