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The Great Wall of China


The Great Wall of China is truly one of the greatest architectural achievements in recorded history. The longest structure ever built, it is about 6,700 kilometers (4,163 miles) long and made entirely by hand. This wall is said to be visible from the moon. It crosses Northern China, from the East coast to Central China (Karls, 1). This massive wall is not only one of the ancient wonders of the world, but it also has been the inspiration of many writers and artists. With a history of more than 2,000 years, some of the sections of the Great Wall are now in ruins or even entirely disappeared. However, it is still one of the most appealing attractions all around the world, because of its architectural greatness and historical significance.
The Great Wall's construction began in 221 BC under the emperor Meng Tien, of the Chin Dynasty (Twitchett, 2). Continual invasions and wars from the barbarians to the North drove the emperor to order its construction to protect the newly unified China. It started at Lintao and extended to Liaotung, reaching a distance of more than 10,000 Li. After crossing the Yellow River, it wound northward, touching the Yang Mountains (Twitchett, 2). Although the wall is considered to be well under 10,000 Li (one Li is approximately a third of a mile) it was truly an amazing accomplishment (Twitchett, 2).
Meng Tien employed some 300,000 men in the creation of the original section of the wall. The building of such a massive wall would definitely be a huge task. A wall that stretches through the wilderness is not easily accessed by supply lines, unlike a highway that creates its own supply line (Delahoye, 3). There was also a massive loss of lives during the construction of the wall, due to widespread disease and injury (Delahoye, 3). In fact it is an Ancient Chinese myth, that each stone in the wall stands for a life lost in the wall's construction (Delahoye, 3). It is recorded that Meng Tien's section of the wall took only ten years to build, but it is believed that it actually took a substantially greater amount of time (Delahoye, 3).  After Meng Tien's original construction the wall was far from completed. Other walls were added to and encompassed within The Great Wall. The last major work on the wall was completed during the Ming Dynasty around 1500 (Delahoye, 3). The Great Wall extends around 1,500 miles in an east-west direction. It travels through four provinces (Hebei, Shanxi, Shaanxi, and Gansu) beginning in northern Hebei and ending in the northwest Gansu province (Delahoye, 3).
The Great Wall is built of many different materials, from granite blocks to tamped earth (Ledoux, 4). These materials ranging from 15 to 50 feet high with a base width between 15 and 30 feet, the wall had guard towers spread along the entire length of the wall (Ledoux, 4). The Great Wall of China was built by stacking mud or clay bricks one by one on top of each other. The brick was first produced in a sun-dried form at least 6,000 years ago, and is the prototype of a wide range of clay building products used today (Ledoux, 4). It is the small building unit in the form of a rectangular block, formed from clay, shale, or other mixtures and burned in a oven, to produce strength, hardness, and heat resistance (Ledoux, 4). The original concept of ancient brick-makers was that the unit should not be bigger than what one man could easily handle (Ledoux, 4).
To understand the Great Wall it is necessary to know the many components of the wall, and their purposes. The Great Wall was renovated from time to time after the Qin Dynasty. A major renovation started with the founding of the Ming Dynasty in 1368, and took 200 years to complete (Karls, 1). The wall seen today is almost exactly the result of this effort. With a total length of over 6,000 kilometers, it extends to the Jiayu Pass in Gansu Province, and in the west to the mouth of the Yalu River in the Liaoning Province in the east (Karls, 1). What ... more

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Atomic Bomb

The information contained in this file is strictly for academic use alone. Outlaw Labs will bear no responsibility for any use otherwise. It would be wise to note that the personnel who design and construct these devices are skilled physicists and are more knowledgeable in these matters than any layperson can ever hope to be... Should a layperson attempt to build a device such as this, chances are s/he would probably kill his/herself not by a nuclear detonation, but rather through radiation exposure. We here at Outlaw Labs do not recommend using this file beyond the realm of casual or academic curiosity. ============================================================================ ----------------------- -+ Table of Contents +- ----------------------- I. The History of the Atomic Bomb ------------------------------ A). Development (The Manhattan Project) B). Detonation 1). Hiroshima 2). Nagasaki 3). Byproducts of atomic detonations 4). Blast Zones II. Nuclear Fission/Nuclear Fusion ------------------------------ A). Fission (A-Bomb) & Fusion (H-Bomb) B). U-235, U-238 and Plutonium III. The Mechanism of The Bomb ------------------------- A). Altimeter B). Air Pressure Detonator C). Detonating Head(s) D). Explosive Charge(s) E). Neutron Deflector F). Uranium & Plutonium G). Lead Shield H). Fuses IV. The Diagram of The Bomb ----------------------- A). The Uranium Bomb B). The Plutonium Bomb ============================================================================ -------------------------------- File courtesy of Outlaw Labs -------------------------------- I. The History of the Atomic Bomb ------------------------------ On August 2nd 1939, just before the beginning of World War II, Albert Einstein wrote to then President Franklin D. Roosevelt. Einstein and several other scientists told Roosevelt of efforts in Nazi Germany to purify U-235 with which might in turn be used to build an atomic bomb. It was shortly thereafter that the United States Government began the serious undertaking known only then as the Manhattan Project. Simply put, the Manhattan Project was committed to expedient research and production that would produce a viable atomic bomb. The most complicated issue to be addressed was the production of ample amounts of 'enriched' uranium to sustain a chain reaction. At the time, Uranium-235 was very hard to extract. In fact, the ratio of conversion from Uranium ore to Uranium metal is 500:1. An additional drawback is that the 1 part of Uranium that is finally refined from the ore consists of over 99% Uranium-238, which is practically useless for an atomic bomb. To make it even more difficult, U-235 and U-238 are precisely similar in their chemical makeup. This proved to be as much of a challenge as separating a solution of sucrose from a solution of glucose. No ordinary chemical extraction could separate the two isotopes. Only mechanical methods could effectively separate U-235 from U-238. Several scientists at Columbia University managed to solve this dilemma. A massive enrichment laboratory/plant was constructed at Oak Ridge, Tennessee. H.C. Urey, along with his associates and colleagues at Columbia University, devised a system that worked on the principle of gaseous diffusion. Following this process, Ernest O. Lawrence (inventor of the Cyclotron) at the University of California in Berkeley implemented a process involving magnetic separation of the two isotopes. Following the first two processes, a gas centrifuge was used to further separate the lighter U-235 from the heavier non-fissionable U-238 by their mass. Once all of these procedures had been completed, all that needed to be done was to put to the test the entire concept behind atomic fission. [For more information on these procedures of refining Uranium, see Section 3.] Over the course of six years, ranging from 1939 to 1945, more than 2 billion dollars were spent on the Manhattan Project. The formulas for refining Uranium and putting together a working bomb were created and seen to their logical ends by some of the greatest minds of our time. Among these people who unleashed the power of the atomic bomb was J. Robert Oppenheimer. Oppenheimer was the major force behind the Manhattan Project. He literally ran the show and saw to it that all of the great minds working on this project made their brainstorms work. He oversaw the entire project from its conception to its completion. Finally the day came when all at Los Alamos would find out whether or not The Gadget (code-named as such during its development) was either going to be the colossal dud ... more

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