ARTICLE IN PRESS BIOSYSTEMS ENGINEERING 98 (2007) 304 – 309 Available at www.sciencedirect.com journal homepage: www.elsevier.com/locate/issn/15375110 Research Paper: PH—Postharvest Technology Aerodynamic properties of tef grain and straw material A.D. Zewduà Food Science & Postharvest Technology‚ Alemaya University‚ P.O. Box 49‚ Ethiopia ar t ic l e i n f o Article history: Received 15 January 2007 Accepted 1 August 2007 Available online 20 September 2007 Terminal velocities
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Current Advances in Sustainable Metalworking Fluids Research Steven J. Skerlos1‚ Kim F. Hayes2‚ Andres F. Clarens3‚ Fu Zhao4 1. Department of Mechanical Engineering‚ University of Michigan 2. Department of Civil and Environmental Engineering‚ University of Michigan 3. Department of Civil and Environmental Engineering‚ University of Virginia 4. School of Mechanical Engineering‚ Purdue University Abstract. Metalworking fluids (MWFs) are harmful to the environment and to the health of workers‚
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INTRODUCTION TO AERONAUTICS: A DESIGN PERSPECTIVE CHAPTER 3: AERODYNAMICS AND AIRFOILS “Isn’t it astonishing that all these secrets have been preserved for so many years just so that we could discover them!!” Orville Wright 3.1 DESIGN MOTIVATION The Physics of Aerodynamic Forces Figure 3.1 shows a cross section view of an aircraft wing. A wing cross section like this is called an airfoil. Lines drawn above and below the airfoil indicate how the air flows around it. The
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The gauge could be wrong- but stated on each gauge 2 kinds of gauges 1. Pressure Gauge-a gauge that measures pressure 2. Flow System Study Guide 1 1. The power output device of a hydraulic system is known as the …ACTUATOR 2. The pressurized fluid used in hydraulic systems is a…..LIQUID 3. Pressure is a measure of FORCE intensity 4. The units of pressure used in the SI system are PASCAL 5. The actuator converts hydraulic energy into MECHANICAL energy How does a hydraulic system make power
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SEDIMENTATION According to Brown (1950)‚ sedimentation is the separation of a suspension into a supernatant clear fluid and a rather dense slurry containing a higher concentration of solid. According to Perry ()‚ sedimentation is the partial separation or concentration of suspended solid particles from a liquid by gravity settling. This field may be divided into the functional operations of thickening‚ whose purpose is to increase the concentration of suspended solids in a feed stream; and clarification
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ABSTRACT Metal cutting fluids changes the performance of machining operations because of their lubrication‚ cooling‚ and chip flushing functions. Typically‚ in the machining of hardened steel materials‚ no cutting fluid is applied in the interest of low cutting forces and low environmental impacts. Minimum quantity lubrication (MQL) presents itself as a viable alternative for hard machining with respect to tool wear‚ heat dissertation‚ and machined surface quality. This study compares the mechanical
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MEC411 Faculty of Mechanical Engineering Engineering Mechanics Centre of Studies V{tÑàxÜ E Axial Loading Materials for this chapter are taken from : 1. 2. Ferdinand P. Beer‚ E. Russell Johnston‚Jr‚ John T. Dewolf‚ David F. Mazurek “ Mechanics of Materials” 5th Edition in SI units R.C.Hibbeler “ Mechanics of Materials “ Seventh Edition Ch 2 - 1 MEC411 Faculty of Mechanical Engineering Engineering Mechanics Centre of Studies Introduction Suitability of a structure or machine
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Manufacturing of Aerogel Aerogel was found by Steven Kistler in 1931‚ but its application cannot be in the market and consumer because there is no item that can use the aerogel. The 1980s the aerogel have a place to be a raw material in existing and new product after they discover a new research about aerogel. They have been considered as a new development material that better than polyurethane foam in refrigerators‚ and as a heat insulator for windows. Aerogel is produced by removing all the
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The Glasgow Coma Scale (GCS). The GCS is an objective assessment that defines the level of consciousness by giving it a numeric value 2.What is a subarachnoid hemorrhage (SAH)? A stroke resulting from intracranial bleeding into the cerebrospinal fluid–filled space between the arachnoid and pia mater membranes on the surface of the brain 3.What are the causes of an SAH? rupture of a cerebral aneurysm (congenital or acquired weakness and ballooning of vessels). 4.What are C.J.’s risk factors for
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convection of a fluid (air) past a copper tube‚ which is used as a heat transfer model. Introduction The general definition for convection may be summarized to this definition "energy transfer between the surface and fluid due to temperature difference" and this energy transfer by either forced (external‚ internal flow) or natural convection. Heat transfer by forced convection generally makes use of a fan‚ blower‚ or pump to provide high velocity fluid (gas or liquid). The high-velocity fluid results
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