Simple manual sand casting process PatternsMain article: Pattern (casting)From the design, provided by an engineer or designer, a skilled pattern maker builds a pattern of the object to be produced, using wood, metal, or a plastic such as expanded polystyrene. Sand can be ground, swept or even strickled into shape. The metal to be cast will contract during solidification, and this may be non-uniform due to uneven cooling. Therefore,...more
PrincipleThis section does not cite any references or sources.Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (October 2009)A schematic of a simple springassamper system used to demonstrate the tuned mass damper system.Tuned mass dampers stabilize against violent motion caused by harmonic vibration. A tuned damper reduces the vibration of a system with a...more
World War II continues to capture the imagination like no other conflict in history. A large part of this may well be because it is the most recent traditional war - as popularly imagined. While any number of large-scale conflicts have arisen since then, none have been "traditional" as World War II has been. Most wars are between generally unequal powers. After all, no one bothers fighting unless they think they can win - or are forced to.However, in World War II, though it started out as the usual big-power-attacks-small-power conflict, big powers - the United States, Great Britain, and the Soviet Union - soon joined in and the conflict expanded worldwide almost overnight. Thus World War II was the kind of war we all know and even "love" - a "set-piece" conflict with a real good versus evil theme.For most wars are over trifling matters; a hill here, a river there. World War II was literally a cultural war, where not only territory was at stake but the very nature of civilization itself, the form it would take for the next several decades or, even, as envisioned by Adolf Hitler, centuries. WWII's case involved the most amount of nations which had 2 military operating...more
CultivationIt is grown primarily in the southwestern Chinese province of Guangxi (mostly in the mountains of Guilin), as well as in Guangdong, Guizhou, Hunan, and Jiangxi. These mountains lend the plants shadows and often are surrounded by mists; because of this the plants are protected from the sun. Nonetheless, the climate in this...more
A banjo is a stringed instrument with a rounded body and a long and thin neck. It is often used in bluegrass and country western music genres and has a distinctive style and sound. If you are interested in buying a banjo for yourself, it is important that you have some basic information about this musical instrument before you...more
Progesterone cream is beneficial for both men and women. Progesterone is a hormone that is made naturally by the human body. It effects every tissue in the body including the uterus, cervix, vagina, the endocrine system, brain cells, fat metabolism, thyroid hormone function, water balance, peripheral nerve myelin sheath synthesis, bone cells, energy production, the immune system, and more. It is not strictly a female hormone. For men progesterone is produced in the adrenal glands in the testes. For women progesterone is made by the corpus luteum of the ovary. The use of natural progesterone cream inhibits the harmful effects of too much estrogen and reverses the effects of "Estrogen Dominance."All natural progesterone creams are completely safe. It is a highly fat-soluble compound that is well absorbed when applied to the skin. There have been no known side effects associated with natural progesterone creams. It's also good to know that progesterone cream is non-toxic. Cape Fear Naturals sells a 2 oz jar of Natural Progesterone Cream, made with 1000mg of USP Micronized progesterone, for only $10.95. USP stands for "United States Pharmacopia" which refers to the grade...more
HistoryMain article: History of the oil shale industryA.C. Kirk's retort, used in the mid-to-late 19th century, was one of the first vertical oil shale retorts.A number of shale oil extraction technologies have evolved over a period of...more
Hot-Meltpolyvinyl chlorideinexpensive, worn molds can be melted and recast.hazardous to handle due to high temperatures required for melting.use limited to model and pattern materials that are heat resistant. Latexproduces a very...more
Are you planning to attend medical school? If you are you will have to take an admission test. Taking in the MCAT practice test may help you to increase your score. These practice tests are available from any test prep companies. They can be...more
Germanic languagesThe heaviest external contribution, nearly one third of the vocabulary, comes from Germanic languages, mainly from Low Saxon (Middle Low German) during the period of German rule, and High German (including standard...more
One of the best things about the range of John Deere gators is their distinctive livery which makes them instantly recognisable. Kids will love the green tractor which will let them mimic and imitate their parent, relative or TV heroes. There are...more
To be totally honest, this is my favorite subject when it comes to selling: sales process. Why? Simply because, in my opinion, the current view of it is of a complex one, meaning, people are making the process more complicated then it...more