Computers in Our Life essays

Computers in Our Life essays Computers are the future whether we like it or not. Some people dislike computers, because of the complications it takes to understand the basics. Computers are not exactly the easiest tools to work with, but they are the most rewarding, and they are the future. Future cars will all be run by computer. You will be able to talk to a car and it will take you to your destination. Telephones are technically computerized. You will soon be able to talk to a person on the telephone as well as look at the person you are talking to on a television set. Also television is computerized. Soon we will have true three dimensional television. We will be able to watch television like we never have watched it before. We will be able to touch the characters, and feel the characters like they were in the room with you. For people who don't know much about computers, you will be lost in the future. You should learn what you can while you still have the chance, because things will develop too quickly for you and you will not be able to cope with new technological events. Computers will fall into careers and our everyday life more rapidly then you think. Perhaps you would like to be a teacher. You will store all class data, students work, names, grades, records all accessible by computer. Or, how about a doctor. You will use computers to examine and evaluate a patients problem quicker and more efficiently. These are only a few examples. The bottom line is, computers provide worthwhile careers. Having a job that involves computers, in terms of the conditions, is very much similar to any office job. In most of the common jobs, the worker will get to an office in the morning, sit at a desk, in front of a computer, and will do very little manual labor except a lot of typing. For example, the computer consultant we have already mentioned, might do several jobs, a few being: Traveling to clients computers, writing customized programs, repairing ...

The History of the Armillary Sphere

The History of the Armillary Sphere An armillary sphere is a miniature representation of celestial objects in the sky, depicted as a series of rings centered around a globe. Armillary spheres have a long history. Early History of the Armillary Sphere Some sources credit Greek philosopher Anaximander of Miletus (611-547 BCE) with inventing the armillary sphere, others credit Greek astronomer Hipparchus (190-120 BCE), and some credit the Chinese. Armillary spheres first appeared in China during the Han Dynasty (206 BCE-220 CE). One early  Chinese  armillary sphere can be traced to Zhang Heng, an astronomer in the Eastern Han Dynasty (25-220 CE). The exact origin of armillary spheres cannot be confirmed. However, during the Middle Ages, armillary spheres became widespread and increased in sophistication. Armillary Spheres in Germany The earliest surviving globes were produced in Germany. Some were made by German map-maker Martin Behaim of Nuremberg in 1492. Another early maker of armillary spheres was Caspar Vopel (1511-1561), a German mathematician and geographer. Vopel made a small manuscript terrestrial globe housed within a series of eleven interlocking armillary rings produced in 1543. What Armillary Spheres Got Wrong By moving the armillary rings, you could theoretically demonstrate how the stars and other celestial objects moved in the sky. However, these armillary spheres reflected early misconceptions of astronomy. The spheres depicted  the Earth at the center of the universe, with interlocking rings illustrating the circles of the sun, moon, known planets, and important stars (as well as the signs of the zodiac). This makes them a model of the inaccurate Ptolemaic (or Earth-centered) cosmic system (as opposed to the  way things actually work, by the Copernican System, with the sun as the center of the solar system.) Armillary spheres  often got geography wrong, too- Caspar Vopels sphere, for instance, depicts North America and Asia as one land mass, a common misconception of the time.