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Nanotechnology ? Nram (Nano Random Access
International Journal Of Engineering Research and Technology (IJERT) IFET-2014 Conference Proceedings INTERFACE ECE T14 INTRACT – INNOVATE - INSPIRE NANOTECHNOLOGY – NRAM (NANO RANDOM ACCESS MEMORY) RANJITHA. T, SANDHYA. R GOVERNMENT COLLEGE OF TECHNOLOGY, COIMBATORE 13. containing elements, nanotubes, are so small, NRAM technology will Abstract— NRAM (Nano Random Access Memory), is one of achieve very high memory densities: at least 10-100 times our current the important applications of nanotechnology. This paper has best. NRAM will operate electromechanically rather than just been prepared to cull out answers for the following crucial electrically, setting it apart from other memory technologies as a questions: nonvolatile form of memory, meaning data will be retained even What is NRAM? when the power is turned off. The creators of the technology claim it What is the need of it? has the advantages of all the best memory technologies with none of How can it be made possible? the disadvantages, setting it up to be the universal medium for What is the principle and technology involved in NRAM? memory in the future. What are the advantages and features of NRAM? The world is longing for all the things it can use within its TECHNOLOGY palm. As a result nanotechnology is taking its head in the world. Nantero's technology is based on a well-known effect in carbon Much of the electronic gadgets are reduced in size and increased nanotubes where crossed nanotubes on a flat surface can either be in efficiency by the nanotechnology. The memory storage devices touching or slightly separated in the vertical direction (normal to the are somewhat large in size due to the materials used for their substrate) due to Van der Waal's interactions. -
What Is Cloud-Based Backup and Recovery?
White paper Cover Image Pick an image that is accurate and relevant to the content, in a glance, the image should be able to tell the story of the asset 550x450 What is cloud-based backup and recovery? Q120-20057 Executive Summary Companies struggle with the challenges of effective backup and recovery. Small businesses lack dedicated IT resources to achieve and manage a comprehensive data protection platform, and enterprise firms often lack the budget and resources for implementing truly comprehensive data protection. Cloud-based backup and recovery lets companies lower their Cloud-based backup and recovery lets data protection cost or expand their capabilities without raising costs or administrative overhead. Firms of all sizes can companies lower their data protection benefit from cloud-based backup and recovery by eliminating cost or expand their capabilities without on-premises hardware and software infrastructure for data raising costs or administrative overhead.” protection, and simplifying their backup administration, making it something every company should consider. Partial or total cloud backup is a good fit for most companies given not only its cost-effectiveness, but also its utility. Many cloud- based backup vendors offer continuous snapshots of virtual machines, applications, and changed data. Some offer recovery capabilities for business-critical applications such as Microsoft Office 365. Others also offer data management features such as analytics, eDiscovery and regulatory compliance. This report describes the history of cloud-based backup and recovery, its features and capabilities, and recommendations for companies considering a cloud-based data protection solution. What does “backup and recovery” mean? There’s a difference between “backup and recovery” and “disaster recovery.” Backup and recovery refers to automated, regular file storage that enables data recovery and restoration following a loss. -
Secondary Memory
Secondary Memory This type of memory is also known as external memory or non-volatile. It is slower than main memory. These are used for storing data/Information permanently. CPU directly does not access these memories instead they are accessed via input-output routines. Contents of secondary memories are first transferred to main memory, and then CPU can access it. For example : Hard disk, CD-ROM, DVD etc. Electronic data is a sequence of bits. This data can either reside in : • Primary storage - main memory (RAM), relatively small, fast access, expensive (cost per MB), volatile (go away when power goes off) • Secondary storage - disks, tape, large amounts of data, slower access, cheap (cost per MB), persistent (remain even when power is off) Data storage has expanded from text and numeric files to include digital music files, photographic files, video files, and much more. These new types of files require secondary storage devices with much greater capacity than floppy disks. 1 Primary storage ( or main memory or internal memory) , often referred to simply as memory , is the only directly accessible to the CPU. Primary memory can be divided into volatile and nonvolatile memories. Primary storage (Main Memory ) has three main functions: 1-It stored all or part of the program that being executed. 2-It also holds data that are being used by the program. 3-It also stored the operating system programs that manage the operation of the computer. Limitation of Primary storage 1. Limited capacity- because the cost per bit of storage is high. 2. Volatile – data stored in it is lost when the electric power is turned off Or interrupted. -
Computer Organization and Architecture Designing for Performance Ninth Edition
COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION William Stallings Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montréal Toronto Delhi Mexico City São Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Editorial Director: Marcia Horton Designer: Bruce Kenselaar Executive Editor: Tracy Dunkelberger Manager, Visual Research: Karen Sanatar Associate Editor: Carole Snyder Manager, Rights and Permissions: Mike Joyce Director of Marketing: Patrice Jones Text Permission Coordinator: Jen Roach Marketing Manager: Yez Alayan Cover Art: Charles Bowman/Robert Harding Marketing Coordinator: Kathryn Ferranti Lead Media Project Manager: Daniel Sandin Marketing Assistant: Emma Snider Full-Service Project Management: Shiny Rajesh/ Director of Production: Vince O’Brien Integra Software Services Pvt. Ltd. Managing Editor: Jeff Holcomb Composition: Integra Software Services Pvt. Ltd. Production Project Manager: Kayla Smith-Tarbox Printer/Binder: Edward Brothers Production Editor: Pat Brown Cover Printer: Lehigh-Phoenix Color/Hagerstown Manufacturing Buyer: Pat Brown Text Font: Times Ten-Roman Creative Director: Jayne Conte Credits: Figure 2.14: reprinted with permission from The Computer Language Company, Inc. Figure 17.10: Buyya, Rajkumar, High-Performance Cluster Computing: Architectures and Systems, Vol I, 1st edition, ©1999. Reprinted and Electronically reproduced by permission of Pearson Education, Inc. Upper Saddle River, New Jersey, Figure 17.11: Reprinted with permission from Ethernet Alliance. Credits and acknowledgments borrowed from other sources and reproduced, with permission, in this textbook appear on the appropriate page within text. Copyright © 2013, 2010, 2006 by Pearson Education, Inc., publishing as Prentice Hall. All rights reserved. Manufactured in the United States of America. -
AXP Internal 2-Apr-20 1
2-Apr-20 AXP Internal 1 2-Apr-20 AXP Internal 2 2-Apr-20 AXP Internal 3 2-Apr-20 AXP Internal 4 2-Apr-20 AXP Internal 5 2-Apr-20 AXP Internal 6 Class 6 Subject: Computer Science Title of the Book: IT Planet Petabyte Chapter 2: Computer Memory GENERAL INSTRUCTIONS: • Exercises to be written in the book. • Assignment questions to be done in ruled sheets. • You Tube link is for the explanation of Primary and Secondary Memory. YouTube Link: ➢ https://youtu.be/aOgvgHiazQA INTRODUCTION: ➢ Computer can store a large amount of data safely in their memory for future use. ➢ A computer’s memory is measured either in Bits or Bytes. ➢ The memory of a computer is divided into two categories: Primary Memory, Secondary Memory. ➢ There are two types of Primary Memory: ROM and RAM. ➢ Cache Memory is used to store program and instructions that are frequently used. EXPLANATION: Computer Memory: Memory plays a very important role in a computer. It is the basic unit where data and instructions are stored temporarily. Memory usually consists of one or more chips on the mother board, or you can say it consists of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions, and the results of processing the data. Memory Units: Computer memory is measured in bits and bytes. A bit is the smallest unit of information that a computer can process and store. A group of 4 bits is known as nibble, and a group of 8 bits is called byte. -
CSCI 120 Introduction to Computation Bits... and Pieces (Draft)
CSCI 120 Introduction to Computation Bits... and pieces (draft) Saad Mneimneh Visiting Professor Hunter College of CUNY 1 Yes No Yes No... I am a Bit You may recall from the previous lecture that the use of electro mechanical relays, and in subsequent years, diodes and transistor, made it possible to con- struct more advanced computers, e.g. ENIAC. This is accredited to the fact that these devices could function as on/off switches. On one hand, they create the ability to encode logic into the circuits of the computer. This means that the computer can perform different tasks under different conditions, i.e. the notion of a program. For instance, one could encode the logic if A OR B then C. On the other hand, these devices allow the engineers to worry less about the values that could possibly arise in the system: the switch is either on or off. It cannot be anything in between. Therefore, this means that any errors due to fluctuation in voltage levels are greatly reduced. It would be enough to simply distinguish between high voltage and low voltage. This brings us to the question of Analog versus Digital. In simple terms, a digital system encodes information using a number of de- vices that have discrete states (e.g. on/off switches). An analog system encodes information using a device that have continuous states (e.g. measurement in an electric circuit). To build an intuition for digital versus analog, consider the problem of en- coding a number using buckets of water. One possibility is to use two kinds of buckets, full and empty. -
Parallel Computer Architecture and Programming CMU / 清华 大学
Lecture 20: Addressing the Memory Wall Parallel Computer Architecture and Programming CMU / 清华⼤学, Summer 2017 CMU / 清华⼤学, Summer 2017 Today’s topic: moving data is costly! Data movement limits performance Data movement has high energy cost Many processors in a parallel computer means… ~ 0.9 pJ for a 32-bit foating-point math op * - higher overall rate of memory requests ~ 5 pJ for a local SRAM (on chip) data access - need for more memory bandwidth to avoid ~ 640 pJ to load 32 bits from LPDDR memory being bandwidth bound Core Core Memory bus Memory Core Core CPU * Source: [Han, ICLR 2016], 45 nm CMOS assumption CMU / 清华⼤学, Summer 2017 Well written programs exploit locality to avoid redundant data transfers between CPU and memory (Key idea: place frequently accessed data in caches/buffers near processor) Core L1 Core L1 L2 Memory Core L1 Core L1 ▪ Modern processors have high-bandwidth (and low latency) access to on-chip local storage - Computations featuring data access locality can reuse data in this storage ▪ Common software optimization technique: reorder computation so that cached data is accessed many times before it is evicted (“blocking”, “loop fusion”, etc.) ▪ Performance-aware programmers go to great effort to improve the cache locality of programs - What are good examples from this class? CMU / 清华⼤学, Summer 2017 Example 1: restructuring loops for locality Program 1 void add(int n, float* A, float* B, float* C) { for (int i=0; i<n; i++) Two loads, one store per math op C[i] = A[i] + B[i]; } (arithmetic intensity = 1/3) void mul(int -
PROTECTING DATA from RANSOMWARE and OTHER DATA LOSS EVENTS a Guide for Managed Service Providers to Conduct, Maintain and Test Backup Files
PROTECTING DATA FROM RANSOMWARE AND OTHER DATA LOSS EVENTS A Guide for Managed Service Providers to Conduct, Maintain and Test Backup Files OVERVIEW The National Cybersecurity Center of Excellence (NCCoE) at the National Institute of Standards and Technology (NIST) developed this publication to help managed service providers (MSPs) improve their cybersecurity and the cybersecurity of their customers. MSPs have become an attractive target for cyber criminals. When an MSP is vulnerable its customers are vulnerable as well. Often, attacks take the form of ransomware. Data loss incidents—whether a ransomware attack, hardware failure, or accidental or intentional data destruction—can have catastrophic effects on MSPs and their customers. This document provides recommend- ations to help MSPs conduct, maintain, and test backup files in order to reduce the impact of these data loss incidents. A backup file is a copy of files and programs made to facilitate recovery. The recommendations support practical, effective, and efficient back-up plans that address the NIST Cybersecurity Framework Subcategory PR.IP-4: Backups of information are conducted, maintained, and tested. An organization does not need to adopt all of the recommendations, only those applicable to its unique needs. This document provides a broad set of recommendations to help an MSP determine: • items to consider when planning backups and buying a backup service/product • issues to consider to maximize the chance that the backup files are useful and available when needed • issues to consider regarding business disaster recovery CHALLENGE APPROACH Backup systems implemented and not tested or NIST Interagency Report 7621 Rev. 1, Small Business planned increase operational risk for MSPs. -
Chapter 6 : Memory System
Computer Organization and Architecture Chapter 6 : Memory System Chapter – 6 Memory System 6.1 Microcomputer Memory Memory is an essential component of the microcomputer system. It stores binary instructions and datum for the microcomputer. The memory is the place where the computer holds current programs and data that are in use. None technology is optimal in satisfying the memory requirements for a computer system. Computer memory exhibits perhaps the widest range of type, technology, organization, performance and cost of any feature of a computer system. The memory unit that communicates directly with the CPU is called main memory. Devices that provide backup storage are called auxiliary memory or secondary memory. 6.2 Characteristics of memory systems The memory system can be characterised with their Location, Capacity, Unit of transfer, Access method, Performance, Physical type, Physical characteristics, Organisation. Location • Processor memory: The memory like registers is included within the processor and termed as processor memory. • Internal memory: It is often termed as main memory and resides within the CPU. • External memory: It consists of peripheral storage devices such as disk and magnetic tape that are accessible to processor via i/o controllers. Capacity • Word size: Capacity is expressed in terms of words or bytes. — The natural unit of organisation • Number of words: Common word lengths are 8, 16, 32 bits etc. — or Bytes Unit of Transfer • Internal: For internal memory, the unit of transfer is equal to the number of data lines into and out of the memory module. • External: For external memory, they are transferred in block which is larger than a word. -
Backup Reminders Once You Have Created Your Backup, Take a Moment 1
External Hard Drives—There are a number of easily accessible, but if your laptop was stolen you’d external hard drives that can be connected to your be without a machine and without your backup! computer through the Firewire or USB port. Many Treat your backups with extreme care! of these hard drives can be configured to automati- cally synchronize folders on your desktop with the Destroy your old backups. As you conduct your folders on the external drive. Although this some- backups more frequently, you’ll end up with a pile what automates the backup process, these drives can of old backup media. Be sure to dispose of old also be easily stolen! media properly. CD and DVDs can be destroyed simply by using a pair of scissors and scratching the How to Backup back of the CD several times. There are also media Backing up your data can be as easy as copying and shredders which work just like a paper shredder pasting the files to the backup drive or you can use leaving your backups in hundred of pieces. Just be specialized programs to help create your backup. sure that the data is no longer readable before you Most ITS Windows computers have Roxio Easy CD toss the backups in the trash. Creator installed. Instructions for using Roxio are located on our website at smu.edu/help/resources/ Keep a copy of your backup off site. You may wish backup/backup.asp. For Macs, simply drag the files to store a backup copy at home in the event of theft to the CDRW drive and click Burn. -
Computer Hardware and Interfacing KSR
16EC764/ Computer Hardware and Interfacing K.S.R. COLLEGE OF ENGINEERING (Autonomous) SEMESTER – VII L T P C COURSE / LESSON PLAN SCHEDULE 3 0 0 3 NAME : K.KARUPPANASAMY CLASS : IV-B.E ECE - A&B SUBJECT : 16EC764 / COMPUTER HARDWARE AND INTERFACING a) TEXT BOOKS : 1. Stephen J.Bigelow, “Troubleshooting, Maintaining & Repairing of PCs”, Tata McGraw Hill, 5th Edition, 2008. 2. B.Govindarajulu, “IBM PC and Clones hardware trouble shooting and maintenance”, Tata McGraw Hill, 12th Edition, 2008. b)REFERENCES: 1. Mike Meyers,“Introduction to PC Hardware and Troubleshooting”, Tata McGraw Hill,1st Edition,2005. 2. Craig Zacker& John Rourke, “The complete reference: PC hardware”, Tata McGraw Hill, 1st Edition, 2007. 3. D.V.Hall, “Microprocessorsand InterfacingProgrammingand Hardware”, McGraw Hill, 2nd Edition, 2006. 4. Mueller.S, “Upgrading and repairing PCS”, Pearson Education, 21th Edition, 2013. C)LEGEND: L - Lecture PPT - Power Point T - Tutorial BB - Black Board OHP - Over Head Projector pp - Pages Rx - Reference Ex - Extra Teaching Lecture S. No Aid Book No./Page No Hour Topics to be covered Required UNIT-I CPU AND MEMORY L1 CPU essentials - processor modes , T /pp429-431 1 OHP X1 modern CPU concepts TX1/pp 431-436 2 L2 Architectural performance features BB TX1/pp436-439 CPU over clocking , TX1/pp481-483, 3 L3 over clocking the system ,over clocking the Intel BB TX1/pp 483-486, processors TX1/pp 487-490 Essential memory concepts -memory 4 L4 BB T /pp 856-857 organizations X1 5 L5 memory packages & modules BB TX1/pp 857-872 6 L6 logical memory -
Nixie Clock Type 'Nixie QTC Plus'
Assembly Instructions And User Guide Nixie Clock Type ‘Nixie QTC Plus’ For Parts Bag Serial Numbers from 1000 onwards Nixie Tube Clock ‘Nixie QTC+’ - 1 - Issue 3 (13 June 2019) www.pvelectronics.co.uk REVISION HISTORY Issue Date Reason for Issue Number 3 13 June 2019 Added support for Dekatron Sync Pulse 2 01 October 2018 C5 changed to 15pF Draft 1 29 August 2018 New document Nixie Tube Clock ‘Nixie QTC+’ - 2 - Issue 3 (13 June 2019) www.pvelectronics.co.uk 1. INTRODUCTION 1.1 Nixie QTC Plus - Features Hours, Minutes and Seconds display Drives a wide range of medium sized solder-in tubes Uses a Quartz Crystal Oscillator as the timebase 12 or 24 hour modes Programmable leading zero blanking Date display in either DD.MM.YY or MM.DD.YY or YY.MM.DD format Programmable date display each minute Scrolling display of date or standard display Alarm, with programmable snooze period Optional GPS / WiFi / XTERNA synchronisation with status indicator LED Dedicated DST button to switch between DST and standard time Supercapacitor backup. Keeps time during short power outages Simple time setting using two buttons Configurable for leading zero blanking Double dot colon neon lamps 11 colon neon modes including AM / PM indication (top / bottom or left / right), railroad (slow or fast) etc. Seconds can be reset to zero to precisely the set time Programmable night mode - blanked or dimmed display to save tubes or prevent sleep disturbance Rear Indicator LEDs dim at night to prevent sleep disturbance Weekday aware ‘Master Blank’ function to turn off tubes and LEDs on weekends or during working hours Separate modes for colon neons during night mode Standard, fading, or crossfading with scrollback display modes ‘Slot Machine’ Cathode poisoning prevention routine Programmable RGB tube lighting – select your favourite colour palette 729 colours possible.