CHAPTER 1 INTRODUCTION Rotor dynamics is the study of rotating machines and has a very important part to play throughout the modern industrial world. Rotating machinery is used in many applications such as Turbo machinery‚ Power stations‚ Machine tools‚ Medical equipment‚ etc. Failure of machinery in applications such as aero engines‚ turbo-machines‚ space vehicles‚ etc. creates enormous repair costs and more importunately may put human life in danger. Rotor dynamics is a collective terms for
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Research Question: How does the length of a paper clip pendulum affect its period of oscillation? BACKGROUND INFORMATION: The simple pendulum: A pendulum is an example of a vibration with a regular‚ consistent motion. A simple pendulum is one which can be considered to be a point mass suspended from a string or rod of negligible mass. It is a resonant system with single resonant frequency. For small amplitues‚ the period of such a pendulum can be approximated by: Where‚ L – length of pendulum‚
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Strategy and the Crystal Cycle John A. Mathews ne of the unexplored areas of business dynamics is how the cyclical behavior of certain important industries poses strategic issues for incumbent firms as well as challengers. All frameworks used in strategy (such as the Porter’s “competitive forces” framework) attempt to capture the decisions made by businesses in the attempt to influence their “business landscape” (to use the language of Ghemawat).1 However‚ the frameworks rarely place these business
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The Crystal Merchant and Englishman’s Development “We make a lot of detours‚ but we’re always heading for the same destination” (77). Paulo Coelho’s novel The Alchemist reveals how Santiago goes about in a journey to achieve his Personal Legend. In his journey Santiago meets several people‚ although not everyone served a role in helping him realize his Personal Legend‚ but the Crystal Merchant and the Englishman served as big part in the realization of Santiago Personal Legend. Santiago had to
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on David Crystal’s article “2b or Not 2b?” 1. David Crystal begins his article with some strong “they say” arguments‚ quoting writers who argue that text messaging is destroying the English language. At what point in the article do you begin to see that his own perspective is very different from that of such critics? - Crystal’s perspective on texting is displayed many times throughout different paragraphs in the article. In paragraph six Crystal states “texting has added a new dimension to language
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indicates that 0.1% of 12-17-year-olds and 0.4% of 18-25-year-olds reported using methamphetamine in the past month‚ representing more than 150‚000 young users in the United States. Crystal meth is a common form of methamphetamine with a number of a street names‚ such as‚ ‘Tina’‚ ‘ice’‚ ‘crystal’ and ‘glass’. Crystal meth‚ or meth for short‚ can be taken by snorting it‚ smoking it or injecting it with a needle. Meth is a highly addictive stimulant‚ usually smoked; creates a euphoric effect on the
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Chapter 2 Basics of Vibration Dynamics Vibrations are mechanical oscillations about an equilibrium position. There are cases when vibrations are desirable‚ such as in certain types of machine tools or production lines. Most of the time‚ however‚ the vibration of mechanical systems is undesirable as it wastes energy‚ reduces efficiency and may be harmful or even dangerous. For example‚ passenger ride comfort in aircraft or automobiles is greatly affected by the vibrations caused by outside
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Hydrated Crystals LAB PURPOSE: The purpose of this lab was to determine the percent of water in the given hydrate. MATERIAL/EQUIPMENT LIST: Crucible and cover Clay Triangle Crucible Tongs PROCEDURE: 1. First‚ the crucible and crucible cover were cleaned and dried. 2. The crucible and crucible cover were then placed on the clay triangle and heated with the Bunsen Burner for 3 minutes. 3. After this‚ the crucible and crucible cover
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Have you ever heard about the “Night of Broken Glass”? Well‚ we have to call it by the original name “Kristallnacht” that’s a German word that its significance it’s literally “Crystal Night”. Now‚ what was the “Crystal Night”? In simple words “Kristallnacht” was one of the many pogroms that were to come toward the Jewish community (at first) in Germany on World War 2. In the city of Paris‚ France on November 7 1938‚ a young German-born Polish Jew called Herschel Grynszpan (Sometimes Greenspan)
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Paragraph 1: Temperature; driver for the change of symmetry There are 3 different phases that are observed and each of them are influenced by temperature. In addition‚ in each phase‚ the polymorph exhibits different crystal structures. At room temperature of 298K‚ it will be in phase 3 where it takes the structure of monoclinic-C2/m. When the temperature rises to 396K‚ it undergoes a transition into Phase 2 also known as the high-temperature monoclinic-A2/a phase. At Phase 2‚ the lattice parameters
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