The guitar dates back 4‚000 years. the oldest evidence of the the existence dates back to 1800 B.C. It was found in Babylonia on clay plaques. . A little later around the same time in Egypt had developed a necked instrument with marked frets wound around the neck. another was also found in a tomb and had deeper curves and was completely flat unlike older instruments that curved up to the sound board and two surfaces‚ back and front‚ were attached to each other with strips of wood that form the sides
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DESIGN OF A LOW COST SOLAR CONCENTRATOR by JEFFREY GENE WRIGHT‚ B.S. in M.E. A THESIS IN MECHANICAL ENGINEERING Submitted to the Graduate Faculty of Texas Tech University in Partial Fulfillment of the Requirements for the Degree of MASTER OF SCIENCE IN MECHANICAL ENGINEERING Approved Accepted December‚ 1986 \ ... / • f IT- ... ACKNOWLEDGMENTS I would like to thank my chairman Dr. William B. Jones for his guidance and assistance in this project. I would
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Proposal to perform waterproofing for Invocare Site: 374 Princes Hwy‚ Rockdale NSW Date: 25/07/2014 - Revision 1 IMPORTANT NOTE: This report has been prepared for Invocare‚ and Adseal Group shall not be liable for any use of‚ or reliance on its contents by any third party. The comments and recommendations provided in this report are based on our visual observations and our experience with similar issues in the past. No destructive investigations were undertaken. This is a recommendation for repair
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Corrosion is the deterioration of a metal as a result of chemical reactions between it and the surrounding environment. Both the type of metal and the environmental conditions‚ particularly what gases that are in contact with the metal‚ determine the form and rate of deterioration. The most common example of corrosion is‚ of course‚ rust. The reddish-brown compound referred to as rust is actually iron oxide (Fe2O3)‚ a result of reactions between oxygen and iron. But the oxidization of iron is
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enormous branch in the making of plastics‚ but most importantly‚ water bottles. It is used significantly in lacquers/paints‚ filling-in materials‚ and for binding certain materials. BPA is mostly used for the making of polycarbonate resins (71%) and epoxy resins (27%). Not to mention‚ it is used as an add-on for thermal papers‚ brake fluids‚ and flame retardants. Tests have exhibited that more than 93% of the world’s population has at least some Bisphenol A in their bodies. In 1999‚ the universal production
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CHAPTER 3: CRYSTAL STRUCTURES & PROPERTIES ISSUES TO ADDRESS... • How do atoms assemble into solid structures? (for now‚ focus on metals) • How does the density of a material depend on its structure? • When do material properties vary with the sample (i.e.‚ part) orientation? Chapter 3- 1 ENERGY AND PACKING • Non dense‚ random packing Energy typical neighbor bond length typical neighbor bond energy • Dense‚ regular packing r Energy typical neighbor bond length
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Corrosion Control and Monitoring ABC Company ABC Chemical Complex Engineering Specification ABC Chemical Complex 1 Corrosion Control & Monitoring SCOPE – This Engineering Specification includes external and internal corrosion control and monitoring for DOT regulated pipelines. – Design‚ construction‚ construction inspection‚ construction acceptance‚ operation‚ and maintenance of DOT regulated pipelines are covered by this Engineering Specification. ABC Chemical Complex 2 Corrosion Control
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Masjid Wilayah located at Kuala Lumpur. The mosque’s design is a blend of Ottoman and Malay architectural styles‚ heavily influenced by the Blue Mosque inIstanbul‚ Turkey. It has 22 domes made from a composite material of glass fibre fabric mixed with epoxy resin to make it durable and light. Concept of this mosque is “mosque in a garden”. They got this concept from another mosque that is masjid Othmaniah in turki. The interior designs of this mosque are combination of Malay culture and European style
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This is a professional and in-depth study on the current state of the Unsaturated polyester resin (UPR) industry in Global and China. The report provides a basic overview of the industry including definitions‚ applications and industry chain structure. Global market analysis and Chinese domestic market analysis are provided with a focus on history‚ developments‚ trends and competitive landscape of the market. A comparison between the international and Chinese situation is also offered. The report
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Asthma in Emergency setting St. Georges Hospital Emergency Department Cezar Darwiche FY1 Asthma Chronic inflammatory disease of the airways Episodic cough‚ wheezing‚ dyspnea Type I hypersensitivity reaction (Ag cross links IgE on pre-sensitized mast cells and basophils triggering release of vasoactive amines) Types • • • • Extrinsic - Onset in childhood -Triggered by inhaled allergen exposure: Dust mites Cockroaches Cat antigen Molds and pollens Types Intrinsic Early adulthood
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