DOCSLIB.ORG

EMB-GATE920T Operating System Overview Document Information

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
EMB-GATE920T Operating System Overview Document Information EMB-GATE920T Operating System Overview Document information Versions & Revisions Revision Date Author Comments 1.0 12/12/2012 M. Pietri First version 1.1 02/05/2013 F. Montorsi Minor fixes 1.2 14/05/2013 F. Montorsi Added default user accounts 1.3 24/05/2013 F. Montorsi Added software desc. for SDK 1.6 References Ref Version Author Title 1 2.6.2 Digia QtCreator IDE (http://qt.digia.com/) 2 Rev. 1.4 Embit Embit Communication Protocol – Generic Documentation 3 5.0.1 VMWare VMWare Player Software (http://www.vmware.com/products/player/) EMB-GATE920T Operating System Overview (rev 1.3) Page 2 of 9 Index 1 Introduction...............................................................................................4 2 Kernel and Drivers......................................................................................4 3 Applications................................................................................................5 3.1 Networking......................................................................................5 3.2 Graphical User Interfaces.....................................................................6 3.3 Development....................................................................................6 4 Default User Accounts.................................................................................8 5 Disclaimer of liability..................................................................................8 EMB-GATE920T Operating System Overview (rev 1.3) Page 3 of 9 Introduction 1 Introduction This document will briefly describe the software available on the Embit Operating System (OS) pre-loaded on EMB-GATE920T products. Note that such OS is a Linux ad-hoc distribution Embit-specific and contains all tools required to communicate with Embit radio modules and with most standard USB products. 2 Kernel and Drivers The kernel version of the Linux core upon which the Embit OS runs is 2.6.32; such standard Linux kernal has been adapted in some parts to allow the best performances on the EMB-GATE920T and to ensure the presence of the proper drivers for all Embit modules. The exact version of the kernel can be obtained running on an SSH terminal connected to the EMB-GATE920T the following command: uname -a The result should look like: Linux embgate 2.6.32.2-EMB-GATE920T-v3 #15 PREEMPT Fri Mar 8 13:01:40 CET 2013 armv4tl GNU/Linux Further informations about the specific versions of the SDK pre-loaded on the EMB-GATE920T can be obtained with the command: cat /etc/embit-release whose output should look like: EMBIT_ID=EMB-GATE920T EMBIT_SDK_VERSION=1.6 EMBIT_OS_FLASH_DATE="24 May 2013" A few commands useful to verify the presence of the drivers used to communicate with FTDI-based USB transceivers (e.g., the EMB-Z231USB) and with CC2531-based USB transceivers (e.g., the EMB-Z2531USB) are: modprobe -l | grep ftdi modprobe -l | grep acm which should show that the kernel has the kernel/drivers/usb/serial/ftdi_sio.ko kernel/drivers/usb/class/cdc-acm.ko drivers built-in. EMB-GATE920T Operating System Overview (rev 1.3) Page 4 of 9 Applications 3 Applications In this Section some of the most important applications/libraries available on the EMB-GATE920T are briefly described. Note that the list reported here is valid only for the EMB-GATE920T shipped with SDK version 1.6 or higher (the version of your EMB-GATE920T can be found in /etc/embit-release). 3.1 Networking 3.1.1 Lighttpd Web Server Lighttpd is a lightweight webserver. it is designed and optimized for high performance environments. With a small memory footprint compared to other web-servers, effective management of the cpu-load, and advanced feature set (FastCGI, SCGI, Auth, Output-Compression, URL-Rewriting and many more) lighttpd is the perfect solution for every server that is suffering load problems. The EMB-GATE920T comes with lighttpd version 1.4.28, with PHP enabled, to allow the fast development of web applications. 3.1.2 OpenVPN OpenVPN is a tool which allows to: ● tunnel any IP subnetwork or virtual ethernet adapter over a single UDP or TCP port; ● use all of the encryption, authentication, and certification features of the OpenSSL library to protect your private network traffic as it transits the internet; ● use any cipher, key size, or HMAC digest (for datagram integrity checking) supported by the OpenSSL library; ● choose between static-key based conventional encryption or certificate-based public key encryption; ● use static, pre-shared keys or TLS-based dynamic key exchange; ● use real-time adaptive link compression and traffic-shaping to manage link bandwidth utilization; ● tunnel networks whose public endpoints are dynamic such as DHCP or dial-in clients; ● tunnel networks through connection-oriented stateful firewalls without having to use explicit firewall rules; The EMB-GATE920T comes with OpenVPN version 2.1.3. EMB-GATE920T Operating System Overview (rev 1.3) Page 5 of 9 Applications 3.1.3 Wi-Fi Configuration Tools The EMB-GATE920T is shipped with all tools required to connect to Wi-Fi networks; in particular, it comes with wpa_supplicant 0.7.3, which is a free software implementation of an IEEE 802.11i supplicant for Linux, FreeBSD, NetBSD, AROS, Microsoft Windows and Haiku. In addition to being a full-featured WPA2 supplicant, wpa_supplicant also implements WPA and older wireless LAN security protocols. Features include: ● WPA and full IEEE 802.11i/RSN/WPA2 ● WPA-PSK and WPA2-PSK (pre-shared key) ("WPA-Personal") ● WPA with EAP (e.g., with RADIUS authentication server) ("WPA-Enterprise") ● key management for CCMP, TKIP, WEP (both 104/128 and 40/64 bit) ● RSN: PMKSA caching, pre-authentication Note also that the EMB-GATE920T by default instantiates a wpa_supplicant daemon on the network interface “wlan0” at boot time (see /etc/init.d/S92wifi_wpa script). 3.2 Graphical User Interfaces 3.2.1 Qt 4.7.x Qt is a cross-platform application framework that is widely used for developing application software with a graphical user interface (GUI) (in which cases Qt is classified as a widget toolkit), and also used for developing non-GUI programs such as command-line tools and consoles for servers. Qt is most notably used in KDE, Adobe Photoshop Elements, OPIE, Skype, VLC media player, etc… Qt uses standard C++ but makes extensive use of a special code generator (called the Meta Object Compiler, or moc) together with several macros to enrich the language. Qt can also be used in several other programming languages via language bindings. It runs on the major desktop platforms and some of the mobile platforms. It has extensive internationalization support. Non-GUI features include SQL database access, XML parsing, thread management, network support, and a unified cross-platform API for file handling. Distributed under the terms of the GNU Lesser General Public License (among others), Qt is free and open source software. All editions support a wide range of compilers, including the GCC C++ compiler and the Visual Studio suite. The current built-in version is 4.7.1 for the EMB-GATE920T. Almost all the libraries provided by this development tool are available. Also external tools like QWT are supported and tested. EMB-GATE920T Operating System Overview (rev 1.3) Page 6 of 9 Applications 3.3 Development 3.3.1 PHP PHP is a general-purpose scripting language originally designed for web development to produce dynamic web pages. For this purpose, PHP code is embedded into the HTML source document and interpreted by a web server with a PHP processor module, which generates the web page document. It also has evolved to include a command-line interface capability and can be used in standalone graphical applications. PHP can be deployed on most web servers (like Thttpd) and as a standalone interpreter, on almost every operating system and platform free of charge. PHP was originally created by Rasmus Lerdorf in 1995. The main implementation of PHP is now produced by The PHP Group and serves as the de facto standard for PHP as there is no formal specification. PHP is free software released under the PHP License which is incompatible with the GNU General Public License (GPL) due to restrictions on the usage of the term PHP. The EMB-GATE920T comes with PHP version 5.2.14. 3.3.2 Python Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python's syntax allows programmers to express concepts in fewer lines of code than would be possible in languages such as C, and the language provides constructs intended to enable clear programs on both a small and large scale. Python supports multiple programming paradigms, including object-oriented, imperative and functional programming styles. It features a dynamic type system and automatic memory management and has a large and comprehensive standard library. The EMB-GATE920T comes with Python version 2.4.5. 3.3.3 SSH Secure Shell or SSH is a network protocol that allows data to be exchanged using a secure channel between two networked devices. The two major versions of the protocol are referred to as SSH1 or SSH-1 and SSH2 or SSH-2. Used primarily on Linux and Unix based systems to access shell accounts, SSH was designed as a replacement for Telnet and other insecure remote shells, which send information, notably passwords, in plaintext, rendering them susceptible to packet analysis. The encryption used by SSH is intended to provide confidentiality and integrity of data over an unsecured network, such as the Internet. The EMB-GATE920T comes with Dropbear SSH client version 0.52. EMB-GATE920T Operating System Overview (rev 1.3) Page 7 of 9 Applications 3.3.4 SQLite Database SQLite is an ACID-compliant embedded relational database management system contained in a relatively small C programming library. The source code for SQLite is in the public domain and implements most of the SQL standard. In contrast to other database management systems, SQLite is not a separate process that is accessed from the client application, but an integral part of it. SQLite uses a dynamically and weakly typed SQL syntax that does not guarantee the domain integrity.
Load more

Recommended publications
  • Release 0.11 Todd Gamblin
    Spack Documentation Release 0.11 Todd Gamblin Feb 07, 2018 Basics 1 Feature Overview 3 1.1 Simple package installation.......................................3 1.2 Custom versions & configurations....................................3 1.3 Customize dependencies.........................................4 1.4 Non-destructive installs.........................................4 1.5 Packages can peacefully coexist.....................................4 1.6 Creating packages is easy........................................4 2 Getting Started 7 2.1 Prerequisites...............................................7 2.2 Installation................................................7 2.3 Compiler configuration..........................................9 2.4 Vendor-Specific Compiler Configuration................................ 13 2.5 System Packages............................................. 16 2.6 Utilities Configuration.......................................... 18 2.7 GPG Signing............................................... 20 2.8 Spack on Cray.............................................. 21 3 Basic Usage 25 3.1 Listing available packages........................................ 25 3.2 Installing and uninstalling........................................ 42 3.3 Seeing installed packages........................................ 44 3.4 Specs & dependencies.......................................... 46 3.5 Virtual dependencies........................................... 50 3.6 Extensions & Python support...................................... 53 3.7 Filesystem requirements........................................
    [Show full text]
  • 1 Australian Synchrotron
    EPICS Qt Update Paul Martin 1 Australian Synchrotron • 3GeV, 216m circumference synchrotron • 8 Beamlines • 12 Software Engineers • IMBL – Worlds Widest Beam - MRT Clinical Program – Safety Critical • Melbourne, Australia • Nearest other facilities: Taiwan, Thailand, Japan • 16th Most Urbanized Country • World’s most livable cities • Hosting ICALEPCS in 2015 2 Qt • Qt is a cross-platform application and UI framework for developers using C++ – Windows,OS X, Linux, Embedded Linux, Android, iOS, vxWorks, Win CE, Amiga OS • Open Source (LPGL v2.1) Qt Designer • Trolltech -> Nokia -> Digia, • Development tools: Qt Creator, Qt Designer, Qmake, Qt Linguist, Qt Assistant, Integration into Visual Studio • Rich set of Widgets and other classes (1000+), Qwt (125+) • Very Good Documentation, help, examples • All Qt Objects contain powerful object communication Qt Creator mechanism (Signal+Slots) • GUI Layout widgets • Qt Project: www.qt-project.org 3 EPICS Qt – Team • Started 2009 – Anthony Owen, Andrew Rhyder, Glenn Jackson • Joined 2011 – Andy Starritt • Joined 2012 – Ricardo Fernandez • Joined 2013 – Zai Wang (1 year contract) 4 EPICS Qt – Rapid GUI Development • Adds Channel Access to standard Qt Widgets and Data Classes • Rapid GUI Dev – Drag and Drop EPICS aware components in Qt Designer • Macro Substitutions for PV names and other GUI functions Qt Designer Channel Access running at design time .ui file – presented using QEGui on any platform (windows / linux) 5 EPICS Qt – Other App Types QCaString Qt Creator QCaInteger QCaFloating QCaByteArray
    [Show full text]
  • Pyqwt Documentation Release 5.2.1
    PyQwt Documentation Release 5.2.1 Gerard Vermeulen July 18, 2010 CONTENTS 1 Introduction 1 1.1 NumPy................................................1 1.2 Qwt..................................................2 1.3 PyQwt with NumPy.........................................2 1.4 Getting help.............................................4 2 Installation 5 2.1 Source Code Installation.......................................5 3 PyQwt Reference Guide 9 3.1 PyQt4.Qwt5 ............................................9 3.2 PyQt4.Qwt5.qplt ........................................ 16 3.3 PyQt4.Qwt5.grace ....................................... 18 4 Copyright 19 5 Indices and Tables 21 Python Module Index 23 Index 25 i ii CHAPTER ONE INTRODUCTION PyQwt is a set of Python bindings for the Qwt library featuring fast plotting of Python lists and tuples and the powerful multi-dimensional arrays provided by NumPy, the fundamental package for efficient scientific and engi- neering computing in Python. 1 1.1 NumPy The NumPy package extends Python with multi-dimensional arrays and a complete set of ‘standard’ functions and operators to manipulate the arrays. NumPy turns Python into is an ideal language experimental numerical and scientific computing (as powerful as APL, MatLab, IDL and others, but much more elegant). If you do not have a mathematical background, you can think of a 1-dimensional array as a column in a spread- sheet. The spreadsheet lets you change whole columns element by element in one single statement. In a similar way, NumPy lets you change whole arrays element by element in one single statement as illustrated by the fol- lowing snippet: >>> import numpy as np >>> x= np.arange(0.0, 10.0, 3.0) >>> y= np.sin(x) >>> x array([ 0., 3., 6., 9.]) >>> y array([ 0.
    [Show full text]
  • Vysoke´Ucˇenítechnicke´V Brneˇ
    VYSOKE´ UCˇ ENI´ TECHNICKE´ V BRNEˇ BRNO UNIVERSITY OF TECHNOLOGY FAKULTA INFORMACˇ NI´CH TECHNOLOGII´ U´ STAV INTELIGENTNI´CH SYSTE´ MU˚ FACULTY OF INFORMATION TECHNOLOGY DEPARTMENT OF INTELLIGENT SYSTEMS BEZDRA´TOVA´ SENZOROVA´ SI´Tˇ SESTAVENA´ Z KOMPONENT ARDUINO DIPLOMOVA´ PRA´ CE MASTER’S THESIS AUTOR PRA´ CE Bc. JAKUB Sˇ PLI´CHAL AUTHOR BRNO 2012 VYSOKE´ UCˇ ENI´ TECHNICKE´ V BRNEˇ BRNO UNIVERSITY OF TECHNOLOGY FAKULTA INFORMACˇ NI´CH TECHNOLOGII´ U´ STAV INTELIGENTNI´CH SYSTE´ MU˚ FACULTY OF INFORMATION TECHNOLOGY DEPARTMENT OF INTELLIGENT SYSTEMS BEZDRA´TOVA´ SENZOROVA´ SI´Tˇ SESTAVENA´ Z KOMPONENT ARDUINO WIRELESS SENSOR NETWORK WITH ARDUINO COMPONENTS DIPLOMOVA´ PRA´ CE MASTER’S THESIS AUTOR PRA´ CE Bc. JAKUB Sˇ PLI´CHAL AUTHOR VEDOUCI´ PRA´ CE Ing. JAN SAMEK, Ph.D. SUPERVISOR BRNO 2012 Abstrakt Diplomova´pra´ce se zaby´va´vytvorˇenı´m bezdra´tove´senzorove´sı´teˇsestavene´z komponent Arduino. Pra´ce obsahuje sezna´menı´s platformou Arduino a jejı´mi mozˇnostmi v kombinaci s bezdra´tovy´mi moduly XBee. Du˚lezˇitou cˇa´stı´pra´ce je na´vrh bezdra´tove´sı´teˇz teˇchto komponent a aplikace pro zobrazenı´nameˇrˇeny´ch hodnot ze senzorovy´ch uzlu˚. Cı´lem pra´ce je vytvorˇenı´senzorove´sı´teˇs dyna- mickou topologiı´a prozkouma´nı´jejı´ho chova´nı´v rea´lne´m prostrˇedı´a vytvorˇenı´aplikace pro ulozˇenı´ a zobrazenı´nameˇrˇeny´ch dat z jednotlivy´ch senzorovy´ch uzlu˚. Abstract This thesis deals with the creation of wireless sensor networks consisting of components Arduino. The work includes introduction to the Arduino platform and its capabilities in combination with the wireless XBee modules.
    [Show full text]
  • Hard Real Time Quick EXAFS Data Acquisition with All Open Source Software on a Commodity Personal Computer Brookhaven National L
    BNL-79366-2007-CP Hard Real Time Quick EXAFS Data Acquisition With All Open Source Software On A Commodity Personal Computer I. So, D.P. Siddons, W.A. Caliebe and S. Khalid Proceedings of Synchrotron Radiation Instrumentation (SRI 2007) Baton Rouge, LA / April 25 - 27, 2007 October 2007 National Synchrotron Light Source Brookhaven National Laboratory P.O. Box 5000 Upton, NY 11973-5000 www.bnl.gov Notice: This manuscript has been authored by employees of Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. The publisher by accepting the manuscript for publication acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. This preprint is intended for publication in a journal or proceedings. Since changes may be made before publication, it may not be cited or reproduced without the author’s permission. BNL-79366-2007-CP DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or any third party’s use or the results of such use of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights.
    [Show full text]
  • Qwt User's Guide
    Qwt User’s Guide 5.2.1 Generated by Doxygen 1.6.3 Sun Apr 11 11:55:10 2010 CONTENTS i Contents 1 Qwt - Qt Widgets for Technical Applications1 1.1 License............................................1 1.2 Platforms...........................................1 1.3 Screenshots..........................................1 1.4 Downloads..........................................1 1.5 Installation..........................................2 1.6 Support............................................2 1.7 Related Projects........................................2 1.8 Language Bindings......................................2 1.9 Donations...........................................2 1.10 Credits:............................................2 2 Qwt License, Version 1.03 3 INSTALL 11 4 Curve Plots 14 5 Scatter Plot 14 6 Spectrogram, Contour Plot 14 7 Histogram 14 8 Dials, Compasses, Knobs, Wheels, Sliders, Thermos 14 9 Deprecated List 14 10 Class Index 14 10.1 Class Hierarchy........................................ 14 11 Class Index 17 11.1 Class List........................................... 17 12 Class Documentation 20 12.1 QwtEventPattern::KeyPattern Class Reference........................ 20 12.1.1 Detailed Description................................. 21 12.2 QwtEventPattern::MousePattern Class Reference...................... 21 12.2.1 Detailed Description................................. 21 12.3 QwtAbstractScale Class Reference.............................. 21 Generated on Sun Apr 11 11:55:09 2010 for Qwt User’s Guide by Doxygen CONTENTS ii 12.3.1 Detailed
    [Show full text]
  • Sviluppo Di Un Modulo Di Visualizzazione, Memorizzazione E Analisi Dati in Real-Time Con Elevato Parallelismo
    ALMA MATER STUDIORUM – UNIVERSITA` DI BOLOGNA CAMPUS DI CESENA Scuola di Scienze Corso di Laurea in Ingegneria e Scienze Informatiche SVILUPPO DI UN MODULO DI VISUALIZZAZIONE, MEMORIZZAZIONE E ANALISI DATI IN REAL-TIME CON ELEVATO PARALLELISMO Relazione finale in PROGRAMMAZIONE AD OGGETTI Relatore Presentata da Prof. MIRKO VIROLI BAJRAM HUSHI Seconda Sessione di Laurea Anno Accademico 2014 – 2015 PAROLE CHIAVE Elements Elettrofisiologia Acquisizione Real Time Analisi in Real Time High Throughput Data Indice Introduzione ix 1 Elements s.r.l. 1 1.1 Chi `eElements . 1 1.2 Descrizione dispositivi . 1 1.3 Caratteristiche dei dispositivi . 2 1.3.1 Protocolli di tensione . 3 1.3.2 Connessione al PC . 3 1.4 Applicazioni in Elettrofisiologia . 3 1.4.1 I canali ionici [1] . 4 2 Tecnologie utilizzate 5 2.1 USB . 5 2.1.1 Descrizione USB . 5 2.1.2 Funzionamento USB 2.0 . 7 2.2 Framework QT . 8 2.3 FTDI . 9 2.4 EEPROM . 9 2.5 Repository . 9 3 Analisi Dei Requisiti 11 3.1 Descrizione del Sistema . 11 3.1.1 Prospettiva del Sistema . 11 3.1.2 Funzionalit`aPrincipali . 11 3.1.3 Requisiti richiesti dall'azienda . 12 3.1.4 Utente Finale . 12 3.1.5 Ambiente d'uso e Limitazioni . 12 3.1.6 Linguaggio e piattaforma di sviluppo . 13 3.2 Interfacciamento con l'esterno . 13 3.2.1 Interfaccia utente . 13 3.2.2 Interfaccia Hardware . 13 3.2.3 Interfaccia software . 13 v vi INDICE 3.3 Suddivisione in moduli . 14 3.3.1 Riconoscimento Dispositivi . 14 3.3.2 Acquisizione dati .
    [Show full text]
  • Visualizing Physiological Signals in Real-Time
    182 PROC. OF THE 14th PYTHON IN SCIENCE CONF. (SCIPY 2015) Visualizing physiological signals in real-time Sebastián Sepúlveda‡∗, Pablo Reyes‡, Alejandro Weinstein‡ https://www.youtube.com/watch?v=6WxkOeTuX7w F Abstract—This article presents an open-source Python software package, on the multiprocessing Python standard library. This allows having dubbed RTGraph, to visualize, process and record physiological signals (electro- concurrent processes for receiving, processing, and displaying the cardiography, electromyography, etc.) in real-time. RTGraph has a multiprocess data. Signal processing tasks, such as spectral estimation, are architecture. This allows RTGraph to take advantage of multiple cores and to based on the SciPy/NumPy stack [Ste11]. This architecture makes be able to handle data rates typically encountered during the acquisition and it possible to ensure that no data is lost and that the user interface processing of biomedical signals. It also allows RTGraph to have a clean separa- has a fast response. tion between the communication and visualization code. The paper presents the architecture and some programming details of RTGraph. It also includes three examples where RTGraph was adapted to work with (i) signals from a Inertial Software architecture Measurement Unit (IMU) in the context of a biomechanical experiment; (ii) The applications described in this article can be classified as a electromyography signals to estimate muscle fatigue; and (iii) pressure signals "data logger". A data logger needs to acquire a stream of data, from a device used to monitor nutrition disorders in premature infants. add a time stamp to the data (if required), and export the time- stamped data to a file in a known file format, such as comma Index Terms—real-time processing, visualization, signal processing separated value (CSV) format.
    [Show full text]
  • Technical Notes All Changes in Fedora 13
    Fedora 13 Technical Notes All changes in Fedora 13 Edited by The Fedora Docs Team Copyright © 2010 Red Hat, Inc. and others. The text of and illustrations in this document are licensed by Red Hat under a Creative Commons Attribution–Share Alike 3.0 Unported license ("CC-BY-SA"). An explanation of CC-BY-SA is available at http://creativecommons.org/licenses/by-sa/3.0/. The original authors of this document, and Red Hat, designate the Fedora Project as the "Attribution Party" for purposes of CC-BY-SA. In accordance with CC-BY-SA, if you distribute this document or an adaptation of it, you must provide the URL for the original version. Red Hat, as the licensor of this document, waives the right to enforce, and agrees not to assert, Section 4d of CC-BY-SA to the fullest extent permitted by applicable law. Red Hat, Red Hat Enterprise Linux, the Shadowman logo, JBoss, MetaMatrix, Fedora, the Infinity Logo, and RHCE are trademarks of Red Hat, Inc., registered in the United States and other countries. For guidelines on the permitted uses of the Fedora trademarks, refer to https:// fedoraproject.org/wiki/Legal:Trademark_guidelines. Linux® is the registered trademark of Linus Torvalds in the United States and other countries. Java® is a registered trademark of Oracle and/or its affiliates. XFS® is a trademark of Silicon Graphics International Corp. or its subsidiaries in the United States and/or other countries. All other trademarks are the property of their respective owners. Abstract This document lists all changed packages between Fedora 12 and Fedora 13.
    [Show full text]
  • 1. Why POCS.Key
    Symptoms of Complexity Prof. George Candea School of Computer & Communication Sciences Building Bridges A RTlClES A COMPUTER SCIENCE PERSPECTIVE OF BRIDGE DESIGN What kinds of lessonsdoes a classical engineering discipline like bridge design have for an emerging engineering discipline like computer systems Observation design?Case-study editors Alfred Spector and David Gifford consider the • insight and experienceof bridge designer Gerard Fox to find out how strong the parallels are. • bridges are normally on-time, on-budget, and don’t fall ALFRED SPECTORand DAVID GIFFORD • software projects rarely ship on-time, are often over- AS Gerry, let’s begin with an overview of THE DESIGN PROCESS bridges. AS What is the procedure for designing and con- GF In the United States, most highway bridges are budget, and rarely work exactly as specified structing a bridge? mandated by a government agency. The great major- GF It breaks down into three phases: the prelimi- ity are small bridges (with spans of less than 150 nay design phase, the main design phase, and the feet) and are part of the public highway system. construction phase. For larger bridges, several alter- There are fewer large bridges, having spans of 600 native designs are usually considered during the Blueprints for bridges must be approved... feet or more, that carry roads over bodies of water, preliminary design phase, whereas simple calcula- • gorges, or other large obstacles. There are also a tions or experience usually suffices in determining small number of superlarge bridges with spans ap- the appropriate design for small bridges. There are a proaching a mile, like the Verrazzano Narrows lot more factors to take into account with a large Bridge in New Yor:k.
    [Show full text]
  • Design and Implementation of a Graphical User Interface for the Flexible, Extensible Radar and Sonar Simulator
    Design and Implementation of a Graphical User Interface for the Flexible, Extensible Radar and Sonar Simulator Prepared by: Poovendren Govender A dissertation submitted to the Department of Electrical Engineering, University of Cape Town, in fulfillment of the requirements for the degree of Bachelor of Science in Engineering 21 October 2008 Supervisor: Yoann Paichard Abstract This project describes the design, implementation and testing of a Graphical User Inter- face for the Flexible Extensible Radar Simulator which was developed by the RRSG at UCT. Prior to the actual design and implementation, research relevant to the GUI development needed to be examined. Research included a basic understanding of radar systems, the FERS simulator and an already existing graphical radar simulator, Sarsim2. The software tools used to complete this project included Qt, OpenGL and QWT. The design phase involved determining the functionality of the GUI and separating the GUI into smaller manageable components. These were the main window, pulse compres- sions, 3D visualization and 2D graphs of results. This allowed for modular design of the GUI. The implementation phase involved realizing the functionality set out in the design phase by using the software tools and relevant research. Once implementation was complete the testing of the GUI was carried out. Any inconsis- tencies found at this stage were either corrected or included as future work. The GUI created utilizes the FERS simulator to model both bistatic and monostatic radars and a maximum of 6 isotropic targets. The radar platforms and targets are displayed on a 3D plot created with OpenGL. The user is able to rotate, zoom and move the 3D coordinate system.
    [Show full text]
  • Include Dll in Qt Creator
    Include dll in qt creator click here to download add method calc in mylibrary; build www.doorway.ru 3 use www.doorway.ru www.doorway.ru Project created by QtCreator T I have www.doorway.ru file and also a www.doorway.ru file of the same name. Tell me - do you just include the library in www.doorway.ru file? If you run the application from Qt Creator, it seems to be able to locate the DLL itself (if it's in the. In addition to Qt libraries, you can add other libraries to your projects. The way the library is added depends on the type and location of the library. You can add a. I've followed the steps described in www.doorway.ru but, somehow I still get undefined reference errors. This is what I did. I put this dll and the header in a DLL directory located on C: I changed the The. cpp: Qt Code: Switch view. #include "Functions.h". void test(). In Windows we have DLLs, in Linux/Unix we have shared libraries. We'll need at least two projects in Qt Creator; one will be the shared library, the path for QMake to depend on when linking against the libraries in there. "www.doorway.ru" is a project file created in Qt Creator which contains "thirdparty/ dcmtk" contains pre-compiled lib, dll and include headers. Yesterday I installed the latest version of the Qt SDK on my home machine ( selecting only the desktop version for MinGW in the installation). Open QtCreator and configure git: Tools->Options-> Version Control -> Git.
    [Show full text]