amp messages in distributed systems

... schedule making or decision making in a group, only small number of peers may be required to be involved But in either case, by selecting group members according to their behaviors in the history, ... and are included in the group G At this point, the initiator peer p0 checks for the number of peers in the group G If more number of peers are needed to be included in the group G, the initiator ... trustworthiness of peers In section 4, based on the trustworthy group concept we discuss trustworthiness-base broadcast (TBB) algorithm Trustworthiness of Peers In P2P systems, each peer has to obtain...

Ngày tải lên: 21/06/2014, 06:20

... when we run programs in distributed systems In fact, the increasing data size and analytics complexity inevitably increase the failure probability of machines in the distributed systems Currently, ... Facebook, LinkedIn), spacial networks (e.g., Google Maps, FedEx) and the Web Querying and mining large graphs are becoming increasingly important in many real applications Examples include two-hop ... queries in distributed systems 1.2.3 Resilience to Failures Failure is an inevitable result of involving more and more computers into one system to cope with the increasing scale of data In distributed...

Ngày tải lên: 08/09/2015, 15:18

... Middleware for Indirect Communication Indirect communication can be achieved through: Message-Queuing Systems Group Communication Systems Message-Queuing (MQ) Systems Message Queuing (MQ) systems provide ... add proc: add int: val(i) int: val(i) int: val(j) int: val(j) Client OS Server OS Passing Reference Parameters Passing reference parameters like value parameters in RPC leads to incorrect results ... Managers directly interact with sending and receiving processes However, Queue Managers are not scalable in dynamic large-scale Distributed Systems (DSs)  Computers participating in a DS may change...

Ngày tải lên: 19/04/2017, 12:53

... communication network Examples of such inherently distributed applications include international stock trading, financial transactions involving multiple banks, air traffic control, distributed hypertext, ... failures We include descriptive to somewhat formal definitions The inter-relationships among the three definitions are pinpointed We also display the factors that impact each definition, including protocol ... main memory, and communication as falling under the rubrik of distributed replication Nor we include some forms of duplication, such as logging and shadowing, that are employed in enhancing individual...

Ngày tải lên: 28/11/2017, 10:29

... [48], we suggest to think of composite events having a start and endpoint thus associating an interval with the composite event instead of using the timestamp of the terminating event Then we can ... Sun Microsystems, http://java.sun.com/beans/ [24] H Kopetz Sparse Time versus Dense Time in Distributed Real-Time Systems In Proceedings of the 12th Intl Conf on Distributed Computing Systems ... time and introduce the concept of accuracy intervals We define abstract interfaces for local as well as global clock readings used for timestamping events If we are merely interested in relative...

Ngày tải lên: 07/03/2014, 17:20

... time For example, on the second and the third line in the previous example, A receives a messages that includes ADVANCES IN NETWORK AND DISTR SYSTEMS SECURITY Figure The initiator role in the Needham-Schroedcr ... verification systems are not advanced enough, resulting in false credit information being accepted as genuine This inexorably hurts financially any e-Merchant having accepted fraudulent information ... 16 ADVANCES IN NETWORK AND DISTR SYSTEMS SECURITY INTRODUCTION In an ever-improving technological world, e-commerce is becoming an increasingly popular a tool for communication, business and analysis...

Ngày tải lên: 25/03/2014, 11:06

... caching [114] is an example of video partitioning in the time domains In prefix caching, the initial portions of streams are cached so that only the remaining portions are transmitted Caching ... caching space In the thesis, we will indistinguishably use “media segmentation”, “media partitioning”, and “video partitioning” Media segmentation in temporal domains and spatial domains Segmenting/partitioning ... Segmenting/partitioning media streams can be made in the temporal domains or in the spatial domains [3] In the time domains, media streams are partitioned into multiple chunks (i.e., portions or segments) in...

Ngày tải lên: 16/09/2015, 08:30

... beneficial in a read-intensive network, whereas fewer copies are beneficial in a write-intensive network Chapter Introduction Thus, a crucial decision while designing an on-line OMP lies in determining: ... request */ {Service the requests in win(o); /*win(o) is empty after servicing*/ Insert Req into win(o); T Co = τ ; } } } For (Each currently existed request window win(o ) in the system) /* No matter ... wait for the entire window win(o) to be filled up for processing Following example will clarify the working policy of the window mechanism in DMW algorithm p Example 3.3: In Figure 3.3(a), when...

Ngày tải lên: 16/09/2015, 17:11

... are accepted infinitely often, then instances of task τ must also be accepted infinitely often, assuming that instances of both τ , τ are released infinitely often More interestingly, one can ... synthesis in a precise manner 2.1 Automata on Infinite Words and Infinite Trees Here we review automata running over infinite words and infinite trees We shall need only automata with Bă uchi and Rabin ... on Infinite Words and Infinite Trees 17 2.2 Logics over Infinite Words and Infinite Trees 21 2.3 Controller Synthesis 25 Chapter Distributed Controller Synthesis for Connectedly Communicating...

Ngày tải lên: 30/09/2015, 05:46

... Distributed systems    Virtually all large computer-based systems are now distributed systems Information processing is distributed over several computers rather than confined to a single ... of all objects in the system and their interfaces Using an ORB, the calling object binds an IDL stub that defines the interface of the called object Calling this stub results in calls to the ... than confined to a single machine Distributed software engineering is therefore very important for enterprise computing systems ©Ian Sommerville 2004 Software Engineering, 7th edition Chapter 12...

Ngày tải lên: 14/09/2012, 11:27

... Switching sequence in six sector Khoa Điện-Điện Tử 2002 – 2007 Control single-phase inverter by Space Vector Modulation CHƯƠNG TRÌNH Đ ÀO TẠO KỸ SƯ CHẤT LƯỢNG CAO VIỆT-PHÁP PFIEV • Single-phase inverter ... KỸ SƯ CHẤT LƯỢNG CAO VIỆT-PHÁP PFIEV • Input: frequency and amplitude of single-phase inverter singleoutput • Control: supply power to load or stop © Minister of Natural Resources Canada 2001 ... technologies, PV systems structure • Completed control both the frequency and the first harmonic magnitude of single-phase inverter output singlevoltage • Load voltage has sinusoidal waveform behind LC...

Ngày tải lên: 26/04/2013, 08:26

... decision makers in evaluating water policies and developing sustainable water resource management plans WEAP operates following the basic principles of water balance accounting and links water supplies ... catchments, assuming no irrigation inflow Inflows and outflows of water for every node and link in the system This includes calculating withdrawals from supply sources to meet demand, and dispatching reservoirs ... water stored in reservoir zone j involves an increase in the target function given by Eq 4, which, since kj are negative by default, in fact mean a decrease in the target function As NPi increases,...

Ngày tải lên: 05/09/2013, 14:58

... inserting a record in a file Interception This is an attack on the confidentiality of the network such as wiretapping or eavesdropping to capture data in a network Eavesdropping is easy in a wireless ... eavesdropped from outside the building where the network is operating In most wireless networks, there is a kind of link level ciphering done by the MAC entities Jamming Interruption of service attacks ... communicating hosts and could observe the frequency and length of encrypted messages being exchanged Such information could be useful to the attacker as it can reveal useful information in guessing...

Ngày tải lên: 29/09/2013, 21:20

... considered independently In this sense it can be considered as a nonlinear counterpart of the well-known separation principle used in linear systems Interestingly, this result can be applied to systems ... regulation of uncertain nonlinear systems Birkhăuser a A Isidori (1995) Nonlinear Control Systems Springer-Verlag, 3rd edition A Isidori (1999) Nonlinear Control Systems II Springer-Verlag D Karagiannis, ... Euler-Lagrange Systems Springer-Verlag A van der Schaft (2000) L2 -Gain and Passivity Techniques in Nonlinear Control Springer-Verlag, 2nd edition 10 V.I Utkin (1992) Sliding Modes in Control and...

Ngày tải lên: 01/01/2014, 18:39

... is nonlinear Electrical power systems are perhaps the most nonlinear systems in the physical world For nonlinear systems, general methods of 2-6 Static and Dynamic Systems Consider a time-invariant, ... and R LC (2-60) In most power systems, d can be neglected In the preceding examples we have calculated the constants of integration from the initial conditions In general, to find n constants, ... applications into automation, robotics, artificial intelligence, man-machine interface (MMI), and intelligent systems We will form a basic understanding of the transfer functions, damping and stability,...

Ngày tải lên: 02/01/2014, 10:44

... The main advantage of I/Q modulation is the symmetric ease of combining independent signal components into a single composite signal and later splitting such a composite signal into its independent ... eliminate the overshoot) without causing the spectrum to spread out again Since narrowing the spectral occupancy was the reason the filtering was inserted in the first place, it becomes a very fine ... Figure 32 Multiplexing - Geography 34 6.5 Combining multiplexing modes In most of these common communications systems, different forms of multiplexing are generally combined For example, GSM uses...

Ngày tải lên: 26/01/2014, 04:20

... định xác minh hệ thống đồng thời SPIN and specifying and verifying of concurrent systems and reactive systems 2.1.Quy định hệ thống PROMELA ngơn ngữ đầu vào SPIN, dùng để quy đinh xác minh hệ thống ... receiveRequest() if sender = given then if waiting = then given := else SPIN and specifying and verifying of concurrent systems and reactive systems given := waiting; waiting := sendAnswer(given) endif elsif ... SPIN and specifying and verifying of concurrent systems and reactive systems 15 gửi nhận thông qua kênh tin nhắn giám sát giao thức bit xen kẽ, đưa danh sách tin nhắn gửi Trong PROMELA, kênh tin...

Ngày tải lên: 15/02/2014, 16:20

... excited field winding Hydro units work at low speed and have salient pole rotors They normally have damper windings in addition to the field winding Damper windings consist of bars placed in slots ... currents circulating in the solid steel or in the damping windings can be treated as currents circulating in two closed circuits (Kundur, 1994) Accordingly, a three-phase synchronous machine may be ... India 605005; www.integra-india.com Printed and bound in Great Britain by MPG Books Ltd, Bodmin, Cornwall Preface Electrical power systems - an overview Power systems engineering - fundamental...

Ngày tải lên: 16/02/2014, 20:20