Gunpowder- Chinese Invention Chinese taoist alchemists were the major force behind the early invention of gunpowder. Emperor Wu Di (156-87 B.C.) of the Han dynasty financed research done by the alchemists on the secrets of eternal life. The alchemists experimented with the sulphur and saltpeter heating the substances in order to transform them. The alchemist Wei Boyang wrote the Book of the Kinship of the Three detailing the experiments made by the alchemists. During the 8th century Tang dynasty
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www.iosrjournals.org A Study on Perception and Awareness on Credit Cards among Bank Customers in Krishnagiri District Dr.S.SUDHAGAR Assistant Professor of Commerce‚ MGR College/Periyar University‚ India. Abstract: A credit card is a small plastic card issued to users as a system of payment. It allows its holder to buy goods and services based on the holder ’s promise to pay for these goods and services. The issuer of the card creates a revolving account and grants a line of credit to the consumer
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The most important invention of mankind Thinking about important and revolutionary inventions‚ make us visualise something material and sophisticated such as the television‚ the computer‚ the car‚ the airplane and so on. Each one of these elements was indeed very revolutionary and brought fundamental changes for the whole world. Nevertheless I consider that the most significant creation of mankind is also one of the oldest. It’s the elaboration of the graphic system of communication: writing
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The 1930’s was an age to remember and cherish‚ for most of the things we have today would not be in place if it was not for the inventions of the 1930’s. Many things were invented in the 1930’s‚ for example; scotch tape was invented by Richard G. Drew (Bellis). There were many simple inventions such as scotch tape and frozen food‚ and then there were complicated inventions such as the jet engine‚ and the radio telescope. Many things were produced in the 1930’s that had an immense impact on our
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Necessity is the mother of invention The meaning of the proverb is self-evident. We invent what we need; unless we feel the pressure of needs‚ we are not likely to invent anything. The fable of the thirsty crow which collected pebbles and threw them into the jar to raise the level of water to the bird’s reach of lips is well-known. Mere necessity would not help us much if we are not moved by thought. Animals have their needs but because they lack the power of thinking and ingenuity‚ they cannot
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Ancient Greek Scientific Inventions The smell of freshly smelted metal lingers in the air as the latest contraption of the great Archimedes is pulled up and set in its place. Checking his designs and equations one last time‚ Archimedes gives the ready for his latest invention‚ preparing to make history once again. Inventors‚ scientists and early mathematicians were prevalent and powerful in ancient Greek times‚ and their contributions were so important and groundbreaking‚ that some of the things
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Following are few of the most famous inventions of the 21st century. See all 5 photos Ginger or Segway Transporter Ginger is a brilliant invention created by Dean Kamen in the year 2001. There was a bit of mystery around this invention but once it was demonstrated‚ its ability was appreciated worldwide. The Segway transporter is an electric power transportation machine. It is basically a personal human transporter; it uses five gyroscopes and built in computer. The segway can move at a speed
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Up‚ Up‚ and Away - The Invention of the Airplane The airplane is not only one of the greatest inventions in the 20th century‚ but also the most wonderful scientific creation of the human history at large. Flying higher and higher‚ floating deep into the air like birds‚ and moving from one place to the other within a jiffy in order to mitigate the distances had always been one of the most astounding dreams of human beings since the beginning of time. Several experiments had been conducted time and
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Java Card Security: How Smart Cards and Java Mix Section 1 -- Java Security Goes Both Ways | | There are a large and growing number of Java systems running the gamut from Java gizmos such as Java rings‚ through smart cards with built-in Java interpreters (the subject of this chapter)‚ to complete Java Development Kits and Integrated Development Environments (IDEs). Java is simultaneously making in-roads on many fronts. In distributed systems‚ Java-based servers and servlets are becoming as
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– Greatest invention speech. 1969 - Neil Armstrong was the first man to walk on the moon‚ the beetles performed there last concert and the invention that would change future generations lives forever was born‚ the internet. Can you imagine a world today without the internet? It’s just not possible. Without question the internet is the most useful‚ time saving‚ informative invention to mankind. The internet opens fascinating opportunities and allows tasks that would have once taken days to complete
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