...Exploring the Motherboard and Busses Exploring the Motherboard and Busses The motherboard represents the logical foundation of the computer. Everything that makes a computer must be attached to the motherboard. Answer the following questions: 1. What are the major components of the motherboard? Provide a brief description of each component. 1. Processor (CPU): The processor is the brain of the computer and is the chip where all the computing is done. 2. Memory: This is where the computer stores information while it is working on it. 3. Chipset: The chipset is a link between the processor and the outside world, and handles things like controlling the hard drives, the USB ports, the keyboard and mouse, generates the sounds the computer makes, and sometimes even creates the pictures you see on the screen. 4. Expansion Slots: Expansion slots are connectors that allow you to attach additional cards on the computer, such as video cards, sound cards, modems, and add abilities to the computer that the motherboard doesn’t provide. 5. I/O (Inputs/ Outputs): These are a set of connectors that allows you to connect various devices to the computer, such as the keyboard, monitor, mouse, hard drives, flash drives, printers, and connect the computer to a network. 2. Upgrading only the motherboard will give some performance improvement to a computer system. Why? Upgrading the motherboard will definitely give performance improvement to any computer system...
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...Unit 10 Research Exercise Josue Tagle ITT Technical Institute NT-1110 1-What exactly is electrostatic discharge (ESD)? Electrostatic discharge (ESD) is the sudden flow of electricity between two electrically charged objects caused by contact, an electrical short or dielectric breakdown. A buildup of static electricity can be caused by tribocharging or by electrostatic induction. The ESD occurs when differently-charged objects are brought close together or when the dielectric between them breaks down, often creating a visible spark. 2-Perform the following research about the CompTIA’s Six Steps to troubleshooting, explain EACH step in DETAIL: Step 1: Identify the Problem In this first step you already know that there is a problem; now you have to identify exactly what it is. This means gathering information. You do this in a few ways: Step 2: Establish a Theory of Probable In step 2 you theorize as to what the most likely cause of the problem is. Start with the most probable or obvious cause. For example, if a computer won’t turn on, your theory of probable cause would be that the computer is not plugged in! This step differs from other troubleshooting processes in that you are not making a list of causes but instead are choosing one probable cause as a starting point. In this step you also need to define whether it is a hardware- or software-related issue. Step 3: Test the Theory to Determine In step 3 take your theory from step 2 and test it. Back...
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...CHAPTER 1 INTRODUCTION TO INFORMATION TECHNOLOGY 1.1 Introduction Modern civilization has become so complicated and sophisticated that to survive one has to be competitive. This compels people to keep themselves informed of all types of happening in the society. And this in turn entails the need for an infrastructure of information. This is the point where information technology or IT becomes most important, as it is the infrastructure that allows us to get information accurately and in time. Before we define information technology, it is important to understand the notion of Data, Information, Technology, and Knowledge. In everyday conversation, people use the terms data and information interchangeably. However, some computer professional make a distinction between the two terms. Data It is the words, numbers, letters, symbol, sound, video and graphics that describe people, events, things and ideas. It is raw facts about people, objects, and events that have little or no meaning. It is the raw material used to create useful information. It becomes information when you use it as the basis for initiating some action or for making a decision. Information It is defined as the words, numbers, letters, symbol, sound, video and graphics used as the basis for human action or decisions. It is data that have been processed and presented in a form suitable for human interpretation, often with the purpose of revealing trends or patterns that can be used in decision-making. It is data...
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...Germany Concepts, Data, and Methods G. Rohwer U. P¨tter o Version 3 October 2003 Fakult¨t f¨r Sozialwissenschaft a u Ruhr-Universit¨t Bochum, GB 1 a 44780 Bochum goetz.rohwer@ruhr-uni-bochum.de ulrich.poetter@ruhr-uni-bochum.de Preface This text is an introduction to concepts and methods of demographic description and analysis. The substantial focus is on the demographic development of Germany, all data refer to this country. The main reason for this focus on a single country is that we want to show how the tools of demography can actually be used for the analysis of demographic problems. The text consists of two parts. Part I introduces the conceptual framework and explains basic statistical notions. This part also includes a short chapter that explains how we speak of “models” and why we do not make a sharp distinction between “describing” and “modeling” demographic processes. Then follows Part II that deals with data and methods. In the present version of the text, we almost exclusively discuss mortality and fertility data; migration is only mentioned in Chapter 6 and briefly considered in the context of a Leslie model at the end of the text. In addition to providing a general introduction to concepts of demography, the text also intends to show how to practically work with demographic data. We therefore extensively document all the data used and explain the statistical calculations in detail. In fact, most of these calculations are quite simple; the only exception...
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...PART ONE Solutions to Exercises Chapter 2 Review of Probability Solutions to Exercises 1. (a) Probability distribution function for Y Outcome (number of heads) probability Y=0 0.25 Y=1 0.50 Y=2 0.25 (b) Cumulative probability distribution function for Y Outcome (number of heads) Probability Y −1.96 and < −1.96. Solving these inequalities yields n ≥ 9220. 18. Pr (Y = $0) = 0.95, Pr (Y = $20000) = 0.05. (a) The mean of Y is μY = 0 × Pr (Y = $0) + 20, 000 × Pr (Y = $20000) = $1000. The variance of Y is 2 σ Y = E ⎢ ( Y − μY ) ⎢ ⎡ ⎣ 2⎤ ⎥ ⎥ ⎦ = (0 − 1000)2 × Pr (Y = 0 ) + (20000 − 1000)2 × Pr (Y = 20000) = (−1000)2 × 0.95 + 19000 2 × 0.05 = 1.9 × 10 7, so the standard deviation of Y is σ Y = (1.9 × 107 ) 2 = $4359. 1 2 (b) (i) E (Y ) = μY = $1000, σ Y = σnY = 1.9×10 = 1.9 × 10 5. 100 2 7 (ii) Using the central limit theorem, Pr (Y > 2000) = 1 − Pr (Y ≤ 2000) ⎛ Y − 1000 2, 000 − 1, 000 ⎞ = 1 − Pr ⎜ ≤ ⎟ 5 1.9 × 10 5 ⎠ ⎝ 1.9 × 10 ≈ 1 − Φ (2.2942) = 1 − 0.9891 = 0.0109. Solutions to Exercises in Chapter 2 11 19. (a) Pr (Y = y j ) = ∑ Pr ( X = xi , Y = y j ) i =1 l l = ∑ Pr (Y =y j|X =xi )Pr ( X =xi ) i =1 (b) E (Y ) = ∑ y j Pr (Y = yj ) = ∑ yj ∑ Pr (Y = yj |X = xi ) Pr ( X = xi ) j =1 j =1 i =1 k k l =∑ l ⎛ k ⎜ ⎜ ⎜ i =1 ⎜ j =1 ⎝ l ∑ yj Pr (Y = yj |X = xi ) ⎟ Pr ( X =xi ) ⎟ ⎟ ⎠ ⎞ ⎟ =∑ E (Y |X =xi )Pr ( X =xi ). i =1 (c) When X and Y are independent, Pr (X = xi , Y = yj ) = Pr (X = xi )Pr (Y = yj ), so σ XY =...
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...LINUX: Rute User’s Tutorial and Exposition Paul Sheer August 14, 2001 Pages up to and including this page are not included by Prentice Hall. 2 “The reason we don’t sell billions and billions of Guides,” continued Harl, after wiping his mouth, “is the expense. What we do is we sell one Guide billions and billions of times. We exploit the multidimensional nature of the Universe to cut down on manufacturing costs. And we don’t sell to penniless hitchhikers. What a stupid notion that was! Find the one section of the market that, more or less by definition, doesn’t have any money, and try to sell to it. No. We sell to the affluent business traveler and his vacationing wife in a billion, billion different futures. This is the most radical, dynamic and thrusting business venture in the entire multidimensional infinity of space-time-probability ever.” ... Ford was completely at a loss for what to do next. “Look,” he said in a stern voice. But he wasn’t certain how far saying things like “Look” in a stern voice was necessarily going to get him, and time was not on his side. What the hell, he thought, you’re only young once, and threw himself out of the window. That would at least keep the element of surprise on his side. ... In a spirit of scientific inquiry he hurled himself out of the window again. Douglas Adams Mostly Harmless Strangely, the thing that least intrigued me was how they’d managed to get it all done. I suppose I sort of knew. If I’d learned...
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...Communication Networks Sharam Hekmat PragSoft Corporation www.pragsoft.com Contents Contents Preface 1. Introduction 1.1. Network Components 1.2. Network Types 1.3. The OSI Model 1.3.1. The Physical Layer 1.3.2. The Data Link Layer 1.3.3. The Network Layer 1.3.4. The Transport Layer 1.3.5. The Session Layer 1.3.6. The Presentation Layer 1.3.7. The Application Layer 1.4. Protocol Notations 1.4.1. Service Primitives 1.4.2. Sequence Diagrams 1.4.3. State Transition Diagrams 1.5. Standards 1.6. Further Reading 1.7. Summary 1.8. Exercises 2. The Physical Layer 2.1. Equipment 2.1.1. Equipment Types 2.1.2. Connection Types 2.2. Transmission 2.2.1. Signal Types 2.2.2. Modulation 2.2.3. Digitization 2.2.4. Synchronization 2.2.5. Transmission Media 2.3. Multiplexing 2.3.1. Space Division Multiplexing (SDM) vi Communication Networks 6 10 1 2 2 4 7 7 8 9 9 10 10 11 11 12 12 13 14 15 16 18 19 19 19 20 20 21 22 23 24 27 28 Copyright © 2005 PragSoft 2.3.2. Frequency Division Multiplexing (FDM) 2.3.3. Time Division Multiplexing (TDM) 2.3.4. Concentration 2.4. Physical Layer Standards 2.4.1. RS-232 2.4.2. CCITT X.21 2.5. Further Reading 2.6. Summary 2.7. Exercises 3. The Data Link Layer 3.1 Link Protocol Types 3.1.1. Synchronous Protocols 3.1.2. Asynchronous Protocols 3.1.3. Master-Slave Protocols 3.1.4. Peer-to-Peer Protocols 3.2. Link Protocol Functions 3.2.1. Acknowledgments 3.2.2. Timers 3.2.3. Error Checking 3.2.4. Retransmission 3.2.5. Flow Control 3.3. Sliding Window...
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...questions from Section I and 2 questions from Section II. 2) Answers to the two Sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Black figures to the right indicate full marks. 5) Use of Logarithmic Tables, Slide Rule, Mollier Charts, Electronic Pocket Calculator and Steam Tables is allowed. 6) Assume suitable data, if necessary. SECTION – I 1. What are different systems on a drilling rig ? Explain any one in detail with suitable diagramme. 18 2. a) Calculate Bottom hole pressure if well depth is 2500 m and mud weight is 1.2 gm/cc. b) Calculate mud weight if mud gradient is 0.87 psi/ft. ′ c) Calculate volume bbl/meter for drill pipe O.D. = 5′ inch and I.D. = 4.276 inch. 2 2 2 10 8 8 16 d) Draw circulation system on a drilling rig. 3. a) Discuss IADC classification of a bit in details. b) Discuss different factors affecting rate of penetration in details. 4. Write short note on : i) Coring ii) Fishing tools iii) BOP iv) Directional well P.T.O. [3963] – 103 -2- *3963103* SECTION – II 5. a) Discuss different types of casings and function of the casings in brief. b) Discuss different types of well completion techniques. 6. a) Discuss primary cementation process with suitable sketch. b) Discuss different perforation methods in brief. 7. a) What are different types of packer ? Discuss any one in brief. b) Draw well head assembly for A, B and C section. 8. Write short note on : i) Drill stem test ii) SSSV iii) X – Mas tree...
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...Technology and Livelihood Education Learning Module COMPUTER HARDWARE SERVICING EXPLORATORY COURSE Grades 7 and Grade 8 TABLE OF CONTENTS What Is This Module About? .................................................................................... 2 How Do You Use This Module ............................................................................... 3 LESSON 1 – Use Hand Tools ........................................................................ 4 – 30 LESSON 2 – Perform Mensuration and Calculation ................................ 31 – 46 LESSON 3 –Prepare and Interpret Technical Drawing ............................ 47 – 63 LESSON 4 – Practice Occupational Safety and Health............................. 64 - 103 Answer Keys .................................................................................................. 104 - 111 Acknowledgment..................................................................................................... 112 COMPUTER HARDWARE SERVICING K to 12 – Technology and Livelihood Education 1 What Is This Module About? Welcome to the world of Computer Hardware Servicing! This Module is an exploratory course which leads you to Computer Hardware Servicing National Certificate Level II ( NC II)1. It covers 4 common competencies that a Grade 7 / Grade 8 Technology and Livelihood Education (TLE) student like you ought to possess, namely: 1) Use hand tools; 2) Perform mensuration and calculation; 3) Prepare...
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...Australia • Brazil • Japan • Korea • Mexico • Singapore • Spain • United Kingdom • United States SEVENTH EDITION Data Communications and Computer Networks A Business User’s Approach Curt M. White DePaul University Australia • Brazil • Japan • Korea • Mexico • Singapore • Spain • United Kingdom • United States Data Communications and Computer Networks: A Business User’s Approach, Seventh Edition Curt M. White Editor-In-Chief: Joe Sabatino Senior Acquisitions Editor: Charles McCormick, Jr. Senior Product Manager: Kate Mason Editorial Assistant: Courtney Bavaro Marketing Director: Keri Witman Marketing Manager: Adam Marsh Senior Marketing Communications Manager: Libby Shipp Marketing Coordinator: Suellen Ruttkay Media Editor: Chris Valentine Art and Cover Direction, Production Management, and Composition: PreMediaGlobal Cover Credit: © Masterfile Royalty Free Manufacturing Coordinator: Julio Esperas © 2013 Course Technology, Cengage Learning ALL RIGHTS RESERVED. No part of this work covered by the copyright herein may be reproduced, transmitted, stored or used in any form or by any means—graphic, electronic, or mechanical, including but not limited to photocopying, recording, scanning, digitizing, taping, Web distribution, information networks, or information storage and retrieval systems, except as permitted under Section 107 or 108 of the 1976 United States Copyright Act—without the prior written permission of the publisher. For product information and technology assistance...
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...Introduction to Multimedia Systems This Page Intentionally Left Blank Introduction to Multimedia Systems Editors Gaurav Bhatnagar Shikha Mehta Sugata Mitra Centre for Research in Cognitive Systems (CRCS) NIITUd. New Delhi, India ACADEMIC PRESS A Harcourt Science and Technology Company San Diego San Francisco New York Boston London Sydney Tokyo Cover art: © 2001 John Foxx Images This book is printed on acid-free paper, w Copyright © 2002 by ACADEMIC PRESS All Rights Reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Requests for permission to make copies of any part of the work should be mailed to: Permissions Department, Harcourt Inc., 6277 Sea Harbor Drive, Orlando, Florida 32887-6777 Explicit permission from Academic Press is not required to reproduce a maximum of two figures or tables from an Academic Press chapter in another scientific or research publication provided that the material has not been credited to another source and that full credit to the Academic Press chapter is given. Academic Press A division of Harcourt, Inc. 525 B Street, Suite 1900, San Diego, Cahfomia 92101-4495, USA http://www.academicpress.com Academic Press Harcourt Place, 32 Jamestown Road, London NWl 7BY, UK http ://www. academicpress...
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...TTL Cookbook BY Don Lancaster A Division of M t i c e Hall ComputerPublishing 11 711 Nonh College, Cmel, Indiana 46032 USA " 1974 by SAMS A Division of Prentice Hall Computer Publishing. All rights reserved. No parts of this book shall be reproduced, stored in a retrieval system, or transmitted by any means. electronic, mechanical, photocopying, recording, or otherwise, without written permission from the publisher. No patent liability is assumed with respect to the use of the information contained herein. While every precaution has been taken in the preparation of this book, the publisher assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. International Standard Book Number: 0-672-21035-5 Library of Congress Catalog Card Number: 73-90295 Interpretation of the printing code: the rightmost double-digit number of the first column is the year of the book's printing; the rightmost double-digit number of the second column, the number of the book's printing. For example, a printing code of 92-23 shows that the twenty-third printing of the book occurred in 1992. Printed in the United States of America. Preface I don't like to revise books. Correct, yes. Revise, no. So I won't. A book becomes history the instant it appears in print. To tamper with history messes with what others and I were thinking at the time and distorts the way things...
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...TELECOMMUNICATION SWITCHING AND NETWORKS TElECOMMUNICATION SWITCHING NffiWRKS AND THIS PAGE IS BLANK Copyright © 2006, 2005 New Age International (P) Ltd., Publishers Published by New Age International (P) Ltd., Publishers All rights reserved. No part of this ebook may be reproduced in any form, by photostat, microfilm, xerography, or any other means, or incorporated into any information retrieval system, electronic or mechanical, without the written permission of the publisher. All inquiries should be emailed to rights@newagepublishers.com ISBN (10) : 81-224-2349-3 ISBN (13) : 978-81-224-2349-5 PUBLISHING FOR ONE WORLD NEW AGE INTERNATIONAL (P) LIMITED, PUBLISHERS 4835/24, Ansari Road, Daryaganj, New Delhi - 110002 Visit us at www.newagepublishers.com PREFACE This text, ‘Telecommunication Switching and Networks’ is intended to serve as a onesemester text for undergraduate course of Information Technology, Electronics and Communication Engineering, and Telecommunication Engineering. This book provides in depth knowledge on telecommunication switching and good background for advanced studies in communication networks. The entire subject is dealt with conceptual treatment and the analytical or mathematical approach is made only to some extent. For best understanding, more diagrams (202) and tables (35) are introduced wherever necessary in each chapter. The telecommunication switching is the fast growing field and enormous research and development are undertaken by...
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...http://www.elsolucionario.blogspot.com LIBROS UNIVERISTARIOS Y SOLUCIONARIOS DE MUCHOS DE ESTOS LIBROS LOS SOLUCIONARIOS CONTIENEN TODOS LOS EJERCICIOS DEL LIBRO RESUELTOS Y EXPLICADOS DE FORMA CLARA VISITANOS PARA DESARGALOS GRATIS. CHAPTER 5 THE CMOS INVERTER Quantification of integrity, performance, and energy metrics of an inverter Optimization of an inverter design 5.1 5.2 5.3 Exercises and Design Problems The Static CMOS Inverter — An Intuitive Perspective Evaluating the Robustness of the CMOS Inverter: The Static Behavior 5.3.1 5.3.2 5.3.3 Switching Threshold Noise Margins Robustness Revisited 5.5 5.4.2 5.4.3 Propagation Delay: First-Order Analysis Propagation Delay from a Design Perspective Power, Energy, and Energy-Delay 5.5.1 5.5.2 5.5.3 5.5.4 Dynamic Power Consumption Static Consumption Putting It All Together Analyzing Power Consumption Using SPICE 5.4 Performance of CMOS Inverter: The Dynamic Behavior 5.4.1 Computing the Capacitances 5.6 Perspective: Technology Scaling and its Impact on the Inverter Metrics 180 Section 5.1 Exercises and Design Problems 181 5.1 Exercises and Design Problems 1. [M, SPICE, 3.3.2] The layout of a static CMOS inverter is given in Figure 5.1. (λ = 0.125 µm). a. Determine the sizes of the NMOS and PMOS transistors. Solution The sizes are wn=1.0µm, ln=0.25µm, wp=0.5µm, and lp=0.25 µm. b. Plot the VTC (using HSPICE) and derive its parameters (VOH, VOL, VM, VIH, and VIL)...
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...Contents 1. Introduction 2. Assessment Test 3. Chapter 1: Getting Started with Ethical Hacking 1. Hacking: A Short History 2. What Is an Ethical Hacker? 3. Summary 4. Exam Essentials 5. Review Questions 4. Chapter 2: System Fundamentals 1. Exploring Network Topologies 2. Working with the Open Systems Interconnection Model 3. Dissecting the TCP/IP Suite 4. IP Subnetting 5. Hexadecimal vs. Binary 6. Exploring TCP/IP Ports 7. Understanding Network Devices 8. Working with MAC Addresses 9. Intrusion Prevention and Intrusion Detection Systems 10. Network Security 11. Knowing Operating Systems 12. Backups and Archiving 13. Summary 14. Exam Essentials 15. Review Questions 5. Chapter 3: Cryptography 2 1. Cryptography: Early Applications and Examples 2. Cryptography in Action 3. Understanding Hashing 4. Issues with Cryptography 5. Applications of Cryptography 6. Summary 7. Exam Essentials 8. Review Questions 6. Chapter 4: Footprinting and Reconnaissance 1. Understanding the Steps of Ethical Hacking 2. What Is Footprinting? 3. Terminology in Footprinting 4. Threats Introduced by Footprinting 5. The Footprinting Process 6. Summary 7. Exam Essentials 8. Review Questions 7. Chapter 5: Scanning Networks 1. What Is Network Scanning? 2. Checking for Live Systems 3. Checking for Open Ports 4. Types of Scans 5. OS Fingerprinting 6. Banner Grabbing 7. Countermeasures 8. Vulnerability Scanning 9. Drawing Network Diagrams 10. Using Proxies 11. Summary 12. Exam Essentials 13. Review Questions...
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