...INTRODUCTION Devices that use light to store and read data have been the backbone of data storage for nearly two decades. Compact discs revolutionized data storage in the early 1980s, allowing multi-megabytes of data to be stored on a disc that has a diameter of a mere 12 centimeters and a thickness of about 1.2 millimeters. In 1997, an improved version of the CD, called a digital versatile disc (DVD), was released, which enabled the storage of full-length movies on a single disc. CDs and DVDs are the primary data storage methods for music, software, personal computing and video. A CD can hold 783 megabytes of data. A double-sided, double-layer DVD can hold 15.9 GB of data, which is about eight hours of movies. These conventional storage mediums meet today's storage needs, but storage technologies have to evolve to keep pace with increasing consumer demand. CDs, DVDs and magnetic storage all store bits of information on the surface of a recording medium. In order to increase storage capabilities, scientists are now working on a new optical storage method called holographic memory that will go beneath the surface and use the volume of the recording medium for storage, instead of only the surface area. Three-dimensional data storage will be able to store more information in a smaller space and offer faster data transfer times. Holographic memory is developing technology that has promised...
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...Laboratory 2: Build a Beam for 3-Point Bending Abstract: This laboratory report contains the design process of a simple foam I-beam. An analysis of the beam is conducted after the application of a 3-point bending from an ATS machine. This beam experienced a linear stiffness of 262 lbf./in. at an ultimate strength of 53.9 lbf. and deflection of 0.351 in. to which it immediately failed. Objective: This laboratory required the design and construction of a beam that spans 30 inches in order to determine the maximum strength and carry load at mid-span. The beam was created exclusively using a 10 by 40 inches piece of foam board of thickness 3/16 inches, 4 hot glue sticks, and Exacto knives. Design Rationale: From the materials mentioned, an I-beam was constructed. The cuts necessary to produce the I-beam are shown in Figured 1. 32 in. 1 in. 5 in. 5 in. Figure 1: Foam Beam Cut Schematic. When deciding how to cut foam board, the thought behind it was to target the areas of the beam that would experience the most applied load force. The final design consisted of five 1-inch units hot glued together at three equally spaced sections between two 32-inch long boards. The top and bottom sections 1 were supposed to keep the board from failing at its ends and splitting apart and the middle section was to keep the board from splitting in the middle and dipping inward. The final design is shown in Figure 2. Top View Side View Front View Figure 2: Finished I-Beam Views The focuses...
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...Always thinking about accelerate the design phase and achieve a clearly idea of the design as we have it physically. 1.3 EXISTING TECHNOLOGIES. 3D printing allows us to create a model of a piece to validate the geometry of it, correct mistakes and make modifications in the design with a low cost. But, how do it create this complex geometry so easy? 3D printing takes data from a CAD software, evaluates the geometry in three dimensions by parallel horizontal layers as close as accurate could be the piece. In this way, a solid volume is generated from a lot of horizontal sections. This is possible to do with different technologies: • SLA, Stereolithography: it is based on the solidification of a photosensitive resin layer by layer. Uses a beam of laser light with certain frequencies and powers. • SGC, Photopolymeration by UV light: Based on solidification, as the SLA, but the difference is that solidifies radiating a powerful UV light and working on all points of a section at a...
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...MECHANICAL & AUTOMOBILE ENGINEERING DEPARTMENT III TERM SECOND YEAR 1 Course number MEC211 2 Course Title STRENGTH OF MATERIALS 3 Credits 5 4 Contact Hours (LT- P) 3-1-2 5 Course Objective To understand the relationship between stress and strain in solids. 6 Course Outcomes On successful completion of this module students will be able to 1. Understand the concept of strain and stress, stress- strain diagram, Elastic constants and constitutive relations.. 2. Determine principal stresses and strain and locate principal planes. 3. Apply the theory of simple bending to compute stresses in beams of homogenous and composite sections of different shapes. 4. Calculate slope and deflection in beams.Use Double integration method, Macaulay’s method, moment area method methods to calculate slope and deflection for the following : a) Cantilevers b) Simply supported beams with or without overhang Under concentrated loads, uniformly distributed loads or combination of concentrated and uniformly distributed loads. 5. Apply different formulae to analyze stresses in struts and columns subjected to axial loads. 7 Outline syllabus 7.01 MEC211.A Unit A Simple stresses and strains 7.02 MEC211.A1 Unit A Topic 1 Concept of stress and strain, St. Venant’s principle, Stress and strain diagram, Hooke’s law, Young’s modulus (E), Modulus of Rigidity(G), Bulk modulus(K), Poisson ratio. 7.03 MEC211.A2 Unit A Topic 2 Stress and elongation in a bar due to its self – weight, Elongation...
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...1 Chapter 4 Shear Forces and Bending Moments 4.1 Introduction Consider a beam subjected to transverse loads as shown in figure, the deflections occur in the plane same as the loading plane, is called the plane of bending. In this chapter we discuss shear forces and bending moments in beams related to the loads. 4.2 Types of Beams, Loads, and Reactions Type of beams a. simply supported beam (simple beam) b. cantilever beam (fixed end beam) c. beam with an overhang 2 Type of loads a. concentrated load (single force) b. distributed load (measured by their intensity) : uniformly distributed load (uniform load) linearly varying load c. couple Reactions consider the loaded beam in figure equation of equilibrium in horizontal direction Fx = 0 HA - P1 cos = 0 HA = P1 cos MB = 0 - RA L + (P1 sin ) (L - a) + P2 (L - b) + q c2 / 2 = 0 (P1 sin ) (L - a) P2 (L - b) q c2 RA = CCCCCCC + CCCC + CC L L 2 L (P1 sin ) a P2 b q c2 RB = CCCCC + CC + CC L L 2 L for the cantilever beam Fx = 0 HA = 5 P3 / 13 12 P3 (q1 + q2) b Fy = 0 RA = CC + CCCCC 13 2 3 12 P3 q1b q1 b MA = 0 MA = CC + CC (L – 2b/3) + CC (L – b/3) 13 2 2 for the overhanging beam MB = 0 - RA L + P4 (L– a) + M1 = 0 MA = 0 - P4 a + RB L + M1 = 0 P4 (L– a) + M1 P4 a - M1 RA = CCCCCC RB = CCCC L L 4.3 Shear Forces and Bending Moments Consider a cantilever beam with a concentrated load P applied at the end A, at the cross section mn, the shear force and bending moment are found ...
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...APPLICATIONS OF ELECTRON MICROSCOPY IN MATERIALS AND METALLURGICAL ENGINEERING A TERM PAPER PRESENTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE POSTGRADUATE COURSE MME 604 [ELECTON OPTICS AND MICROSCOPY] BY MARK, UDOCHUKWU 20044449298 SUBMITTED TO ENGR. PROF. O. O. ONYEMAOBI [EXAMINER] DEPARTMENT OF MATERIALS AND METALLURGICAL ENGNEERING FEDERAL UNIVERSITY OF TECHNOLOGY, OWERRI AUGUST 2005 i Markudo [2005] PREFACE The electron microscope is an indispensable modern analytical and research tool. Microscopy is employed in all branches of science to identify materials, characterize unknown substances or study the properties of known materials. This term paper surveys the applications of electron microscopy in the field of materials and metallurgical engineering. I hereby acknowledge my lecturer on Electron Optics and Microscopy (MME 604), Engr. Prof. O. O. Onyemaobi. He has been sharpening my research and writing skills since my undergraduate days. This is the third term paper I will be submitting to him. ii TABLE OF CONTENTS Title Page Preface Table of Contents CHAPTER ONE 1.0 1.1 1.2 1.2.1 1.2.2 1.2.3 Introduction Materials and Metallurgical Engineering Microscopes and Microscopy Levels of Structure Methods of Structural and Compositional Elucidation Microscopy i ii iii-v 1-12 1 1 3 4 6 8 13-24 13 13 14 16 17 18 19 21 CHAPTER TWO 2.0 2.1 2.2 2.3 2.3.1 2.3.2 2.3.3 2.3.4 Transmission Electron Microscopy Interaction of Electrons...
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...2 2013 ABSTRACT The advent of various wireless technologies have revolutionized the communication infrastructure and consequently changed the entire world into a global village. Use of wireless technology has also been made for transmission of electric power wirelessly. It can reduce heavy line losses; increase the portability of power systems. It also integrates the communication technologies and electric power to the same platform. This paper presents a comprehensive review and detailed analysis of various techniques used for wireless power transmission. Role of wireless power transmission in applications of smart grid like electric vehicle charging has also been covered. Feasibility, implementations, operations, results and comparison among different methods have been elaborated in order to identify the favourable and economical method for low power and small distance applications. KEYWORDS: Power systems, Wireless power transmission, Magnetic resonance. INTRODUCTION Role of electricity in modern machine era is considered like circulation of blood in human body. Electrical energy has made human life easy and luxurious. Electricity is being distributed using the conventional grid which is in service for last hundred years. Conventional grid is characterized by out dated infrastructure, delayed communication and heavy transmission losses. One of the solutions of the...
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...ANALYSIS OF THE PHYSICAL PARAMETERS INFLUENCING BEAM PATTERN OF A UNIFORM LINEAR ARRAY OF ANTENNAS Final Year Project Report Presented by SAJID UR REHMAN CIIT/SP08-BET-090/ISB USMAN ULLAH ASIF CIIT/SP08-BET-121/ISB In Partial Fulfillment Of the Requirement for the Degree of Bachelor of Science in Electrical (Telecommunication) Engineering DEPARTMENT OF ELECTRICAL ENGINEERING COMSATS INSTITUTE OF INFORMATION Technology, ISLAMABAD JAN 2012 Declaration We, hereby declare that this project neither as a whole nor as a part there of has been copied out from any source. It is further declared that we have developed this project and the accompanied report entirely on the basis of our personal efforts made under the sincere guidance of our supervisor. No portion of the work presented in this report has been submitted in the support of any other degree or qualification of this or any other University or Institute of learning, if found we shall stand responsible. Signature:______________ Sajid Ur Rehman Signature:______________ UsmanUllah Asif COMSATS INSTITUTE OF INFORMATION Technology, ISLAMABAD JAN 2012 ANALYSIS OF THE PHYSICAL PARAMETERS INFLUENCING BEAM PATTERN OF A UNIFORM LINEAR ARRAY OF ANTENNAS An Undergraduate Final Year Project Report submitted to the Department of ELECTRICAL ENGINEERING As a Partial Fulfillment...
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...engineering design have led to dramatic reductions in size, power consumption and cost for digital circuitry, wireless communications and Micro ElectroMechanical Systems (MEMS). This has enabled very compact, autonomous and mobile nodes, each containing one or more sensors, computation and communication capabilities, and a power supply. The missing ingredient is the networking and applications layers needed to harness this revolutionary capability into a complete system. We review the key elements of the emergent technology of “Smart Dust” and outline the research challenges they present to the mobile networking and systems community, which must provide coherent connectivity to large numbers of mobile network nodes co-located within a small volume. “Smart Dust.” It is certainly within the realm of possibility that future prototypes of Smart Dust could be small enough to remain suspended in air, buoyed by air currents, sensing and communicating for hours or days on end. At least one popular science fiction book has articulated just such a vision [12]. In this paper, we are concerned with the networking and applications challenges presented by this radical new technology. These kinds of networking nodes must consume extremely low power, communicate at bit rates measured in kilobits per second, and potentially need to operate in high volumetric densities. These requirements dictate the need for novel ad hoc routing and media access solutions. Smart dust will enable an unusual range of...
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...using other technologies. Spatial coherence typically is expressed through the output being a narrow beam which is diffraction-limited, often a so-called "pencil beam." Laser beams can be focused to very tiny spots, achieving a very high irradiance. Or they can be launched into a beam of very low divergence in order to concentrate their power at a large distance. Temporal (or longitudinal) coherence implies a polarized wave at a single frequency whose phase is correlated over a relatively large distance (the coherence length) along the beam.[3] A beam produced by a thermal or other incoherent light source has an instantaneous amplitude and phase which vary randomly with respect to time and position, and thus a very short coherence length. Most so-called "single wavelength" lasers actually produce radiation in several modes having slightly different frequencies (wavelengths), often not in a single polarization. And although temporal coherence implies monochromaticity, there are even lasers that emit a broad spectrum of light, or emit different wavelengths of light simultaneously. There are some lasers which are not single spatial mode and consequently their light beams diverge more than required by the diffraction limit. However all such devices are classified as "lasers" based on their method of producing that light: stimulated emission. Lasers are employed in applications where light of the required spatial or temporal coherence could not be produced using simpler...
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...fiber optic links, except the beam is transmitted through free space. While the transmitter and receiver must require line-ofsight conditions, they have the benefit of eliminating the need for broadcast rights and buried cables. Laser communications systems can be easily deployed since they are inexpensive, small, low power and do not require any radio interference studies. The carrier used for the transmission signal is typically generated by a laser diode. Two parallel beams are needed, one for transmission and one for reception. Due to budget restrictions, the system implemented in this project is only one way. event, disaster scenes, communications). conventions or space band I. INTRODUCTION (HEADING 1) Laser communication is one of the emerging area of wireless communication system. Due to its low noise ratio makes its one of the well suited communication medium for exchanging of information. Currently laser communication is adopted in satellite communication for space research activities and due to its efficiency on low noise ratio, inexpensive, low power, flexibility and its resistance to the radio interference makes laser communication as one of the research area in wireless communication. In this process, this paper comprises one such application of laser communication for information exchange between any two devices. Laser communication can be used to transmit sound and data signal through the laser beam of system. The intensity of ...
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...Advanced Accounting Beams Anthony 11th Edition Solutions Manual Click here to download immediately!!! http://solutionsmanualtestbanks.blogspot.com/2011/10/advanced-accountingbeams-anthony-11th.html ----------------------------------------------------------------------Advanced Advanced Advanced Advanced Accounting Accounting Accounting Accounting Beams Beams Beams Beams Anthony Anthony Anthony Anthony 11th 11th 11th 11th Edition Edition Edition Edition Solutions Solutions Solutions Solutions Manual Manual Manual Manual -------------------------------------------------------------------------***THIS IS NOT THE ACTUAL BOOK. YOU ARE BUYING the Solution Manual in e-version of the following book*** Name: Advanced Accounting Author: Beams Anthony Edition: 11th ISBN-10: 0132568969 Type: Solutions Manual - The file contains solutions and questions to all chapters and all questions. All the files are carefully checked and accuracy is ensured. - The file is either in .doc, .pdf, excel, or zipped in the package and can easily be read on PCs and Macs. - Delivery is INSTANT. You can download the files IMMEDIATELY once payment is done. If you have any questions, please feel free to contact us. Our response is the fastest. All questions will always be answered in 6 hours. This is the quality of service we are providing and we hope to be your helper. Delivery is in the next moment. Solution Manual is accurate. Buy now below and the DOWNLOAD LINK WILL APPEAR IMMEDIATELY once payment is...
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...CTRL-ALT-DEL, this keyboard shortcut brings up Task Manager in XP, 2000, Vista and 7 no matter how the system is configured: CTRL-SHIFT-ESC (4) What is the default appearance of the mouse pointer when it is waiting for an action to complete in Windows XP? (I-beam, hour-glass, two-headed arrow, or arrow) (5) What is the default appearance of the mouse pointer when it is not on an active area of the window? (I-beam, hour-glass, two-headed arrow, or arrow) (6) What is the default appearance of the mouse pointer when you wish to resize a window on the desktop? (I-beam, hour-glass, two-headed arrow, or arrow) (7) If you press certain keys (example, the Alt key), the Windows OS will designate hot keys (accelerator keys) by changing them in this way: (boldface, italics, underline, or blinking) (8) Provide two other names for the Status Area (where you see the clock, date, and background programs): System Tray ,Notification Area_ (9) Windows 7 allows you to “pin” applications to the Taskbar. What does Windows XP provide that was similar for your frequently-used applications?(two words) Quick Launch (10) If you tell a user she needs to reboot, be sure to tell her to do this first: Close all Applications (11) Where do you turn on or turn off Windows Updates? System Properties (12) Why should you leave Windows Updates “on”? to correct security and other problems with program...
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...VACUUM TUBES A Research Paper Presented to the Faculty of School of Engineering Asia Pacific College Magallanes, Makati by Pamela Joyce M. Espigol In Partial Fulfillment Of the Requirements in Electronic Devices and Circuits Lec Date Submitted October 30, 2015 II. INTRODUCTION a. RESEARCH PAPER SUMMARY NO. | ABSTRACT | METHODOLOGY | RESULTS | CONCLUSION | RECOMMENDATION | 1 | The objective of this work is to simulate a tube guitar amplifier, the Giannini True Reverber designed by Carlos Alberto Lopes in the nineteen sixties. The nonlinear “overdrive” characteristics of these devices make them attractive for guitarists since odd harmonics are added into the guitar sound as well as sound compression. The shortcomings of these amplifiers led to the development of DSP simulation techniques over the last few years. Many past DSP simulations of tube amplifiers were implemented using Static Digital Wave shappers for the task of replicating the tube transfer characteristics. Since the physical behavior of such systems is quite complex, physically informed models are necessary for more precision in the simulation, requiring more computer power. A Wave Digital Filter (WDF) simulation of the Giannini True Reverber double 12AX7 preamp is accomplished in this work using Koren’s triode equations and Block Compiler, where each parameter was acquired in the original electronic schematic or by measurement of the real amplifier. The real preamp is compared to the...
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...MECHANICS OF MATERIALS Other Loading Types Seventh Edition Beer • Johnston • DeWolf • Mazurek Fig. 4.3 (a) Free-body diagram of a clamp, (b) freebody diagram of the upper portion of the clamp. • Eccentric Loading: Axial loading which does not pass through section centroid produces internal forces equivalent to an axial force and a couple • Transverse Loading: Concentrated or distributed transverse load produces internal forces equivalent to a shear force and a couple • Principle of Superposition: The normal stress due to pure bending may be combined with the normal stress due to axial loading and shear stress due to shear loading to find the complete state of stress. 4-3 Fig. 4.4 (a) Cantilevered beam with end loading. (b) As portion AC shows, beam is not in pure bending. Copyright © 2015 McGraw-Hill Education. Permission required for reproduction or display. MECHANICS OF MATERIALS Symmetric Member in Pure Bending Seventh Edition Beer • Johnston • DeWolf • Mazurek • Internal forces in any cross section are equivalent to a couple. The moment of the couple is the section bending...
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