python and distributed systems design

... developed and commands are issued that define safe path waypoints for tools, ma- nipulators, and inspection probes so as to avoid collisions and singularities, and as- sure part quality and process ... nevertheless, been found useful by many researchers and engineers for designing intelligent machine systems Systems based on the RCS architecture have been designed and more or less implemented for a wide ... autonomous undersea vehicles, unmanned land vehicles, coal mining au- tomation systems, postal service mail handling systems, and submarine opera- tional automation systems Software developers accustomed

Ngày tải lên: 26/01/2014, 07:20

... Model-Based Architecture Concepts for Autonomous Systems Design and Simulation Bernard P Zeigler and Sungdo Chi AlI-Simulation Group Department of Electrical and Computer Engineering University of Arizona ... integration of symbolic and numeric data, qualitative and quantitative information, reasoning and computation, robustness and refinement, discrete event system specification and continuous system ... then summarized in a Hierarchical Encapsulation and Abstraction Principle (HEAP) and this principle is illustrated in the planning, operations and diagnosis task domains 1 OVERVIEW To cope with

Ngày tải lên: 26/01/2014, 07:20

... Trang 1BIOMETRIC SYSTEMS, DESIGN AND APPLICATIONS Edited by Zahid Riaz Trang 2Biometric Systems, Design and Applications Edited by Zahid Riaz Published by InTech ... identification systems and has an impact on safety and efficiency of the system Military standard MIL HDBK 217 is also used to estimate the inherent reliability of electronic equipment and systems based ... of the literature and standards for design and anthropometric measurements provided guidance on proper angles for fingers or palm placement Standards focus on line of sight and reach envelopes

Ngày tải lên: 28/06/2014, 14:20

... Policy for Pressure Vessels and Pressurized Systems, and JSC Policy Directive (JPD) 1710.1, Design, Inspection, and Certification of Pressure Vessels and Pressurized Systems This document provides ... considered mandatory 2.1 NASA DOCUMENTS a JPD 1710.1, Design, Inspection, and Certification of Pressure Vessels and Pressurized Systems b JPG 1700.1, Johnson Space Center Safety and Health Handbook ... determination If the design is approved, the PSE must return the design package and sign the original PV/S drawing and/or the Pressure Systems Design Review Record If the design is not approved,

Ngày tải lên: 31/07/2014, 23:21

... threads and how they can be used tobuild applications can be found in Lewis and Berg (998) and Stevens (1999) 3.1.1 Introduction to Threads To understand the role of threads in distributed systems, ... organization of distributed systems when decisions aretaken about where components are placed, for example We discuss such systemarchitectural issues next 2.4 SELF -MANAGEMENT IN DISTRIBUTED SYSTEMS Distributed ... architectures and software architectures On the one hand, weneed to organize the components of a distributed system such that monitoring andadjustments can be done, while on the other hand we need

Ngày tải lên: 08/08/2014, 21:22

... Many distributed systems and applications are built directly on top of the ple message-oriented model offered by the transport layer To better understandand appreciate the message-oriented systems ... middleware system in that it is designed to execute as a layer ofabstraction between existing (network) operating systems and distributed applica-tions Initially designed for UNIX, it has now been ... the client and server machines are identical and all the parametersand results are scalar types such as integers, characters, and Booleans, this modelworks fine However, in a large distributed

Ngày tải lên: 08/08/2014, 21:22

... particular, by dialing the number The telephone systemsubsequently does the rest As a last example, consider the use of global and local names in distributedsystems A typical example of a local name ... administrational layer, and a managerial layer. A comparison between name servers at different layers is shown in Fig 5-14 In distributed systems, name servers in the global and administrational ... naming systems descrip-5.4.1 Directory Services Attribute-based naming systems are also known as directory services, where-as systems that support structured naming are generally called naming systems.With

Ngày tải lên: 08/08/2014, 21:22

... phase, and consists of steps 1 and 2 The secondphase is the decision phase, and consists of steps 3 and 4 These four steps areshown as finite state diagrams in Fig 8-18 Trang 21SEC 8.5 DISTRIBUTED ... means to recover to a correct state, and subsequentlywhen and how the state of a distributed system can be recorded and recovered to, by means of checkpointing and message logging 8.6.1 Introduction ... concerning checkpoints andmessage logging Elnozahy et al (2002) provide a survey of checkpointing andlogging in distributed systems Various algorithmic details can be found in Chowand Johnson (1997)

Ngày tải lên: 08/08/2014, 21:22

... hosts need to be protected against malicious agents Mostusers of distributed systems will not be experts in systems technology and have noway of telling whether the program they are fetching from ... loading is normallyhandled hand-The second component of a Java sandbox consists of a byte code verifier,which checks whether a downloaded class obeys the security rules of the sandbox In particular, ... participate inthe attack Specht and Lee (2004) distinguish two types of attacks: those aimed atbandwidth depletion and those aimed at resource depletion suc-Bandwidth depletion can be accomplished

Ngày tải lên: 08/08/2014, 21:22

... layer for distributed systems and applications... have been used as the basic layer for distributed systems and applications In this chapter, we consider distributed file systems ... failures, and hardware failures 11.1.2 Cluster-Based Distributed File Systems NFS is a typical example for many distributed file systems, ... other distributed file systems By and large, ... CORBA-based systems? [...]... text 11 DISTRIBUTED FILE SYSTEMS Considering that sharing data is fundamental to distributed systems, it is not surprising that distributed file systems

Ngày tải lên: 08/08/2014, 21:22

... authoring of Web documents is handled through a separate protocol, namely WebDAV (Goland et al., 199 9) WebDAV stands for Web Distributed Authoring and Versioning and provides a simple means ... AND REPLICATION Perhaps one of the most important systems- oriented developments in Webbased distributed systems is ensuring that access to Web documents meets stringent performance and ... and Allen, 199 6; and Blake-Wilson et aI., 2003) As shown in Fig 12-22, TLS is an application-independent security...560 DISTRIBUTED WEB-BASED SYSTEMS CHAP 12 These two tasks can be distributed

Ngày tải lên: 08/08/2014, 21:22

... network operating systems and distributed operating systems (Tanenbaum andVan Steen, 2002) In a network operating system, the users are aware of the existence of multiple computersand can log in ... height="17">Index Operating Systems Design and Implementation, Third Edition By Andrew S Tanenbaum - Vrije Universiteit Amsterdam, TheNetherlands, Albert S Woodhull - Amherst, Massachusetts ... "floppy disk" and "diskette" interchangeably.) The PD765 has 16 commands, each specified byloading between 1 and 9 bytes into a device register These commands are for reading and writing

Ngày tải lên: 12/08/2014, 22:21

... The procedures enter_item and remove_item, which are not shown, handle the bookkeeping of putting items into the buffer and taking items out of the buffer Simpo PDF Merge and Split Unregistered ... required, and MINIX retains some source code for 16-bit mode However, the version described here and 30 Simpo PDF Merge and Split Unregistered Version - http://www.simpopdf.com 31 distributed ... details, but understanding what happens when an interrupt occurs and when an iretd instruction is executed is essential to understanding how the kernel controls the transitions to and from the "running"

Ngày tải lên: 12/08/2014, 22:21

... of the current status of each handler in a list For each function in the list,intr_handle sets the corresponding bit in irq_actids, and calls the handler If a handler has nothing to do or if ... and 7 are a request to copy the data to the FS cache and the reply,message 8 tells the FS the data is ready, and messages 9 and 10 are a request to copy the data from the cache to the user, and ... put_irq_handler (line 8162) At initialization put_irq_handler is called foreach process that must respond to an interrupt This puts the address of the handler routine into the interrupttable, irq_handlers,

Ngày tải lên: 12/08/2014, 22:21

... device, and there are several pages of macro definitions specifying controller registers, status bits and commands, data structures, and. .. the basic hardware MINIX 3 has been developed on and ... innermost cylinders, and some disk designs require a change in the drive current to the read-write heads for the inner tracks. This is handled by the disk controller hardware and is not visible ... system). The difference in data density between inner and outer tracks means a sacrifice in capacity, and more sophisticated systems exist. Floppy disk designs that rotate at higher speeds when the heads

Ngày tải lên: 12/08/2014, 22:21

... Memory management systems can be divided into two basic classes: those that move processes back and forthbetween main memory and disk during execution (swapping and paging), and those that do ... operating system Even if the hardware has beendesigned with, for example, 512-byte pages, the operating system can easily regard pages 0 and 1, 2 and 3, 4and 5, and so on, as 1-KB pages by always allocating ... into that partition and run until itterminates However, nowadays, few, if any, operating systems, support this model, even on mainframe batchsystems [Page 377] 4.1.3 Relocation and Protection Multiprogramming

Ngày tải lên: 12/08/2014, 22:21

... of distributed systems and to suggest the issues that arise in their design In many of them, significant challenges were encountered and overcome As the scope and scale of distributed systems and ... WebSphere and Message Queues Distributed Objects and Components: Covering component-based middleware and case studies on Enterprise JavaBeans, Fractal and CORBA Designing Distributed Systems: ... principles on which the Internet and other distributed systems are based; their architecture, algorithms and design; and how they meet the demands of contemporary distributed applications We begin...

Ngày tải lên: 27/03/2014, 23:12

... open DRE systems are resource sensitive and require multiple resources such as memory, CPU, and network bandwidth In open DRE systems, resources allocation cannot be performed during designtime ... management algorithms and middleware platforms and improve flexibility (iii) Design of a framework determines its performance and applicability The design of key modules and entities of the resource ... R Shapiro, and G Duzan, “Component-based dynamic QoS adaptations in distributed real-time and embedded systems, ” in Proceedings of the International Symposium on Distributed Objects and Applications...

Ngày tải lên: 22/06/2014, 00:20

... hold Distributed Systems, Edition 3: Chapter1 Solutions Last updated: 18 September 2000 3:53 pm ©George Coulouris, Jean Dollimore and Tim Kindberg 2000 Distributed Systems: Concepts and Design ... messages Distributed Systems, Edition 3: Chapter Solutions Last updated: October 2000 6:12 pm ©George Coulouris, Jean Dollimore and Tim Kindberg 2000 Distributed Systems: Concepts and Design Edition ... Dollimore and Tim Kindberg 2000 serialize(Object o) { c = class(o); class_handle = get_handle(c); if (class_handle==null) // write class information and define class_handle; write class_handle write...

Ngày tải lên: 23/10/2014, 12:42