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Ecole Polytechnique Federale de Lausanne
(92 results)-
White Papers
Artificial Immune System for Collaborative Spam Filtering
November 10, 2008, 12:00am PST
Artificial Immune Systems (AIS) use the concepts and algorithms inspired by the theory of how the human immune system works. This paper presents the design and initial evaluation of a new...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Resolving FP-TP Conflict in Digest-Based Collaborative Spam Detection by Use of Negative Selection Algorithm
August 22, 2008, 12:00am PDT
A well-known approach for collaborative spam filtering is to determine which emails belong to the same bulk, e.g. by exploiting their content similarity. This allows, after ob-serving an initial...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Password Interception in a SSL/TLS Channel
January 1, 2009, 12:00am PST
Simple password authentication is often used e.g. from an email software application to a remote IMAP server. This is frequently done in a protected peer-to-peer tunnel, e.g. by SSL/TLS. At...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Economic Aspects of Cloud Computing
October 27, 2009, 12:00am PDT
The new paradigm of cloud computing is taking over individual and business computation tasks. The cloud is dissociated from super-computers offering computational services in the early information...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Pathchecker: An RFID Application for Tracing Products in Supply-Chains
July 7, 2009, 12:00am PDT
This paper presents an application of RFIDs for supply-chain management. In the application, it considers two types of readers. On one part, one has readers that will mark tags at given points....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Throughput-Delay Trade-Off for Hierarchical Cooperation in Ad Hoc Wireless Networks
December 11, 2007, 12:00am PST
The work discussed in this paper shows that hierarchical cooperation not only can lead to higher throughput in ad hoc networks, but also to reasonable end-to-end delay, given that some extra care...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Malicious Traffic Detection in Local Networks With Snort
September 17, 2009, 12:00am PDT
Snort is an open source Network Intrusion Detection System combining the benefits of signature, protocol and anomaly based inspection and is considered to be the most widely deployed IDS/IPS...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Break WEP Faster With Statistical Analysis
June 1, 2006, 12:00am PDT
The WEP (Wired Equivalent Privacy) protocol has been created in order to provide privacy to the 802.11 based wireless space. This protocol is a weak version of RC4, because the initial vector used...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Fixed to Mobile Convergence (FMC): Technological Convergence and the Reconfiguration in the Organization of the European Telecommunications Industry
August 1, 2006, 12:00am PDT
The European telecommunications industry is in transition. Innovation and regulation have transformed the competitive environment, the organization of the industry, and the status of the incumbent...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Multi-Radio Diversity in Wireless Networks
January 1, 2011, 12:00am PST
This paper describes the Multi-Radio Diversity (MRD) wireless system, which uses path diversity to improve loss resilience in Wireless Local Area Networks (WLANs). MRD coordinates wireless...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Analysis of Supportable Rates in Symmetric Blocking Wavelength Routers
January 1, 2011, 12:00am PST
Constructing an n × n non-blocking wavelength router using n × n optical cross-connects may be impractical due to certain constraints such as the cost or space limitations. Moreover, in many cases...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Algebraic Gossip on Arbitrary Networks
January 11, 2009, 12:00am PST
Consider a network of nodes where each node has a message to communicate to all other nodes. For this communication problem, the authors analyze a gossip based protocol where coded messages are...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Exploiting the Path Propagation Time Differences in Multipath Transmission With FEC
January 11, 2009, 12:00am PST
The authors consider a transmission of a delay-sensitive data stream from a single source to a single destination. The reliability of this transmission may suffer from bursty packet losses - the...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
The Improbable Differential Attack: Cryptanalysis of Reduced Round CLEFIA
October 11, 2010, 12:00am PDT
In this paper the authors present a new statistical cryptanalytic technique that they call improbable differential cryptanalysis which uses a differential that is less probable when the correct...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Hierarchical Routing Over Dynamic Wireless Networks
September 16, 2009, 12:00am PDT
A major challenge in the design of wireless ad hoc networks is the need for distributed routing algorithms that consume a minimal amount of network resources. This is particularly important in...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Indexing Data-Oriented Overlay Networks
January 1, 2011, 12:00am PST
The application of structured overlay networks to implement index structures for data-oriented applications such as peer-to-peer databases or peer-to-peer information retrieval, requires highly...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Primary-Backup Protocol for In-Memory Database Replication
June 6, 2006, 12:00am PDT
The paper presents a primary-backup protocol to manage replicated In-Memory DataBase systems (IMDBs). The protocol exploits two features of IMDBs: coarse-grain concurrency control and deferred...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Fostering the Reuse and Collaborative Development of Models in the AMS SoC Design Process
June 15, 2007, 12:00am PDT
Systems-on-Chips (SoCs) integrate more and more heterogeneous components: analog/RF/digital circuits, sensors, actuators, software. For the design of these systems very different description...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Queryll: Java Database Queries Through Bytecode Rewriting
August 27, 2006, 12:00am PDT
When interfacing Java with other systems such as databases, programmers must often program in special interface languages like SQL. Code written in these languages often needs to be embedded in...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
ModelLib: A Web-Based Platform for Collecting Behavioural Models and Supporting the Design of AMS Systems
July 13, 2006, 12:00am PDT
This paper describes ModelLib, a web-based platform for collecting models from different domains (e.g. electrical, mechanical) and levels of abstractions. Use cases for this tool are presented,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Exploring Temperature-Aware Design of Memory Architectures in VLIW Systems
November 21, 2008, 12:00am PST
This paper presents a thermal model to analyze the temperature evolution in the shared register files found on VLIW systems. The use of this model allows the analysis of several factors that have...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Chebyshev Polynomial Approximation for Distributed Signal Processing
May 27, 2011, 12:00am PDT
Unions of graph Fourier multipliers are an important class of linear operators for processing signals defined on graphs. The authors present a novel method to efficiently distribute the...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Real-Time Compressed Sensing-Based Personal Electrocardiogram Monitoring System
January 29, 2011, 12:00am PST
Wireless Body Sensor Networks (WBSN) hold the promise to enable next-generation patient-centric mobile-cardiology systems. A WBSN-enabled ElectroCardioGram (ECG) monitor consists of wearable,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Gaussian Diamond Network With Adversarial Jammer
April 29, 2010, 12:00am PDT
In this paper the authors consider communication from a source to a destination over a wireless network with the help of a set of authenticated relays. They focus on a special "Diamond" network,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Network Coding: From Theory to Media Streaming
June 11, 2009, 12:00am PDT
The traditional multimedia coding and streaming architectures have been challenged in the recent years with emerging applications such as wireless low-power surveillance, multimedia sensor...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Video-Based Camera Tracking Using Rotation-Discriminative Template Matching
February 24, 2009, 12:00am PST
This paper presents a video-based camera tracker that combines marker-based and feature point-based cues in a particle filter framework. The framework relies on their complementary performance....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Resolving FPTP Conflict in Digest-Based Collaborative Spam Detection by Use of Negative Selection Algorithm
August 22, 2008, 12:00am PDT
A well-known approach for collaborative spam filtering is to determine which emails belong to the same bulk, e.g. by exploiting their content similarity. This allows, after observing an initial...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Tackling Acceptability Issues in Communities of Practice by Providing a Lightweight Email-Based Interface to eLogbook: A Web 2.0 Collaborative Activity and Asset Management System
September 25, 2008, 12:00am PDT
eLogbook is a Web-based collaborative environment designed for communities of practice. It enables users to manage joint activities, share related assets and get contextual awareness. In addition...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Solving an Avionics Real-Time Scheduling Problem by Advanced IP-Methods
July 2, 2010, 12:00am PDT
The authors report on the solution of a real-time scheduling problem that arises in the design of software-based operation control of aircraft. A set of tasks has to be distributed on a minimum...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
On Survivable Routing of Mesh Topologies in IP-Over-WDM Networks
January 1, 2011, 12:00am PST
Generally, there are two approaches for providing survivability of IP-over-WDM networks: protection and restoration. Protection uses pre-computed backup paths applied in the case of a failure....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Survivable Mapping Algorithm by Ring Trimming (SMART) for Large IP-Over-WDM Networks
January 1, 2011, 12:00am PST
The authors develop a fast and efficient algorithm that finds a survivable (i.e., robust to single fiber failures) mapping of IP topology on the mesh of fibers in IP-over-WDM networks; they call...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Improving API Documentation for Java-Like Languages
October 1, 2010, 12:00am PDT
The Javadoc paradigm for displaying API documentation to users is quite popular, with similar variants existing for many mainstream languages. However, two user interface design properties of...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Computer Code as a Medium for Human Communication: Are Programming Languages Improving?
May 18, 2009, 12:00am PDT
Programming languages are not only useful to command computers, they also increasingly are a medium for human communication. The authors will use the framework of distributed cognition to discuss...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
State Exploration of Scala Actor Programs
March 13, 2009, 12:00am PDT
The growing use of multi-core and networked computing systems is increasing the importance of developing reliable parallel and distributed code. Unfortunately, developing and testing such code is...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
An Adaptive System for Real-Time Scalable Video Streaming With End-to-End QoS Control
February 25, 2010, 12:00am PST
This paper presents a real-time adaptive video streaming system based on the latest standardized video codec H.264/MPEG-4 AVC scalable extension (SVC). The system provides a full MPEG-21 media...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Tracking of Mobile Devices Through Bluetooth Contacts
October 7, 2010, 12:00am PDT
The authors investigate if it is possible to reconstruct a mobile phone's mobility using its Bluetooth contacts with other mobile devices, some of which are equipped with GPS receivers. The data...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Robust Infants Face Tracking Using Active Appearance Models: A Mixed-State CONDENSATION Approach
September 13, 2007, 12:00am PDT
In this paper a new extension of the CONDENSATION algorithm, with application to infants face tracking, will be introduced. In this paper the authors address the problem of tracking a face and its...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Thermal-Aware Compilation for Register Window-Based Embedded Processors
September 21, 2010, 12:00am PDT
The development of compiler-based mechanisms to optimize the thermal profile of large register files to improve the processor reliability has become an important issue. Thermal hotspots have been...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
HOLLOWS: A Power-Aware Task Scheduler for Energy Harvesting Sensor Nodes
September 1, 2010, 12:00am PDT
Energy Harvesting Sensor Nodes (EHSNs) have stringent low-energy consumption requirements, but they need to concurrently execute several types of tasks (processing, sensing, actuation, etc.)....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Graphical Approach to Prove the Semantic Preservation of UML/OCL Refactoring Rules
September 19, 2006, 12:00am PDT
Refactoring is a powerful technique to improve the quality of software models including implementation code. The software developer applies successively so-called refactoring rules on the current...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Visual Debugging of MPI Applications
January 27, 2009, 12:00am PST
The authors present the design and implementation of a debugging tool that displays a message-passing graph of the execution of an MPI application. Parts of the graph can be hidden or highlighted...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Simulator for Adaptive Parallel Applications
January 29, 2009, 12:00am PST
Dynamically allocating computing nodes to parallel applications is a promising technique for improving the utilization of cluster resources. Detailed simulations can help identify allocation...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Debugger for Flow Graph Based Parallel Applications
January 29, 2009, 12:00am PST
Flow graphs provide an explicit description of the parallelization of an application by mapping vertices onto serial computations and edges onto message transfers. The authors present the design...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Model Checking Duration Calculus: A Practical Approach
January 1, 2012, 12:00am PST
Model checking of real-time systems with respect to Duration Calculus (DC) specifications requires the translation of DC formulae into automata-based semantics. This task is difficult to automate....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Comparative Study of Two State-of-the Art Sequence Processing Techniques for Hand Gesture Recognition
March 5, 2009, 12:00am PST
In this paper, the authors address the problem of the recognition of isolated, complex, dynamic hand gestures. The goal of this paper is to provide an empirical comparison of two state-of-the-art...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
A Core Calculus for Scala Type Checking
June 29, 2006, 12:00am PDT
The authors present a minimal core calculus that captures interesting constructs of the Scala programming language: nested classes, abstract types, mixin composition, and path dependent types....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Optimizing Higher-Order Functions in Scala
September 25, 2008, 12:00am PDT
Scala relies on libraries as the default mechanism for language extension. While this provides an elegant solution for growing the language, the performance penalty incurred by call-by-name...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Cache-Aware Lock-Free Concurrent Hash Tries
June 14, 2011, 12:00am PDT
This paper describes an implementation of a non-blocking concurrent shared-memory hash trie based on single-word compare-and-swap instructions. Insert, lookup and remove operations modifying...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Asymptotic Capacity of Multi-Level Amplify-and-Forward Relay Networks
April 19, 2007, 12:00am PDT
This paper analyzes the capacity of a wireless relay network composed of a large number of nodes that operate in an amplify-and-forward mode and that divide into a fixed number of levels. The...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Asymptotic Capacity of Orthogonal Multi-Level Amplify-and-Forward Relay Networks
November 22, 2007, 12:00am PST
This paper analyzes the capacity of a wireless relay network composed of a large number of nodes that operate in an amplify-and-forward mode and that divide into a fixed number of levels. The...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
High SNR Analysis of the MIMO Interference Channel
April 29, 2008, 12:00am PDT
The rate region achievable by two transmitter-receiver pairs who wish to communicate over a Gaussian interference channel has been the subject of intense study over the last decades. Recently, the...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Diversity-Multiplexing Tradeoff for the Slow Fading Interference Channel
December 18, 2007, 12:00am PST
The authors establish the high SNR diversity-multiplexing tradeoff of the fading interference channel, for a general interference level and under the assumption that transmitters and receivers are...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Diversity-Multiplexing Tradeoff for the MIMO Static Half-Duplex Relay
December 17, 2008, 12:00am PST
In this paper, the authors investigate the Diversity-Multiplexing Tradeoff (DMT) of the multiple-antenna (MIMO) static half-duplex relay channel. The relay channel is assumed to be symmetric in...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Flip-and-Forward Achieves the Optimal Diversity-Multiplexing Tradeoff for the Two-Hop MIMO Relay Channel, With Two Relay Antennas
May 10, 2010, 12:00am PDT
The gain of using multiple antennas for setting up communication over a wireless medium has been widely acknowledged in the literature, starting with the seminal works. For point-to-point...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Secure Position-Based Routing for VANETs
February 17, 2007, 12:00am PST
Vehicular Communication (VC) systems have the potential to improve road safety and driving comfort. Nevertheless, securing the operation is a prerequisite for deployment. So far, the security of...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Impact of Pseudonym Changes on Geographic Routing in VANETs
June 12, 2006, 12:00am PDT
Vehicle communication is regarded as one of the major applications of Mobile Ad hoc NETworks (MANETs). In these so called Vehicular Ad hoc NETworks (VANETs) security and privacy are crucial...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Privacy and Identity Management for Vehicular Communication Systems: A Position Paper
July 3, 2011, 12:00am PDT
The emerging technology of Vehicular Communications (VC) raises a number of technical problems that need to be addressed. Among those, security and privacy concerns are paramount for the wide...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Impact of Vehicular Communication Security on Transportation Safety
July 3, 2011, 12:00am PDT
Transportation safety, one of the main driving forces of the development of Vehicular Communication (VC) systems, relies on high-rate safety messaging (beaconing). At the same time, there is...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Architecture for Secure and Private Vehicular Communications
July 3, 2011, 12:00am PDT
The deployment of Vehicular Communication (VC) systems is strongly dependent on their security and privacy features. In this paper, the authors propose a security architecture for VC. The primary...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
On the Road: Reflections on the Security of Vehicular Communication Systems
July 3, 2011, 12:00am PDT
Vehicular Communication (VC) systems have recently drawn the attention of industry, authorities, and academia. A consensus on the need to secure VC systems and protect the privacy of their users...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
An Easy to Use Bluetooth Scatternet Protocol for Fast Data Exchange in Wireless Sensor Networks and Autonomous Robots
August 10, 2007, 12:00am PDT
The authors present a Bluetooth Scatternet Protocol (SNP) that provides the user with a serial link to all connected members in a transparent wireless Bluetooth network. By using only local...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Robust Geo-Routing on Embeddings of Dynamic Wireless Networks
February 15, 2007, 12:00am PST
Wireless routing based on an embedding of the connectivity graph is a very promising technique to overcome shortcomings of geographic routing and topology-based routing. This is of particular...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Network Coding Applications
January 28, 2008, 12:00am PST
Network coding is an elegant and novel technique introduced at the turn of the millennium to improve network throughput and performance. It is expected to be a critical technology for networks of...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Robust Routing for Dynamic Wireless Networks Based on Stable Embeddings
January 1, 2011, 12:00am PST
Routing packets is a central function of multi-hop wireless networks. Traditionally, there have been two paradigms for routing, either based on the geographical coordinates of the nodes...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Distributed Sensor Failure Detection in Sensor Networks
September 26, 2011, 12:00am PDT
The authors investigate distributed sensors' failure detection in networks with a small number of defective sensors. They assume that sensors measure a smooth physical phenomenon and that...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
ProtoPeer: From Simulation to Live Deployment in One Step
June 11, 2008, 12:00am PDT
Simulators are a commonly used tool in peer-to-peer systems research. However, they may not be able to capture all the details of a system operating in a live network deployment. Transitioning...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Bandwidth-Efficient Delay-And Loss-Tolerant Overlay Routing
September 4, 2008, 12:00am PDT
Peer-To-Peer (P2P) systems are mostly deployed in heterogeneous environments with resource availability varying not only across the nodes, but also over time. If any of the shared computational,...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
More on Castor: The Scalable Secure Routing Protocol for Ad-Hoc Networks
September 9, 2009, 12:00am PDT
Wireless ad hoc networks are inherently vulnerable, as any node can disrupt the communication of potentially any other node in the network. Many solutions to this problem have been proposed. In...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Friend-to-Friend Computing: Building the Social Web at the Internet Edges
November 5, 2008, 12:00am PST
The current Social Web is centralized. Large information silos store all the users' profiles, their social links and much of the other personal data. In return for the reliable service the users...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Generic Emergent Overlays in Arbitrary Peer Identifier Spaces
July 3, 2007, 12:00am PDT
Unstructured overlay networks are driven by simple protocols that are easy to analyze and implement. The lack of structure, however, leads to weak message delivery guarantees and poor scaling....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Authentication-Free Fault-Tolerant Peer-to-Peer Service Provisioning
June 29, 2007, 12:00am PDT
The correct functioning of a peer-to-peer network relies on cooperative behavior of peers as service providers. Current approaches to detection and deterrence of non-cooperative behavior, such as...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
ProtoPeer: A P2P Toolkit Bridging the Gap Between Simulation and Live Deployment
March 5, 2009, 12:00am PST
Simulators are a commonly used tool in peer-to-peer systems research. However, they may not be able to capture all the details of a system operating in a live network. Transitioning from the...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Self-Organized Fault-Tolerant Routing in Peer-to-Peer Overlays
June 23, 2009, 12:00am PDT
In sufficiently large heterogeneous overlays message loss and delays are likely to occur. This has a significant impact on overlay routing, especially on longer paths. The existing solutions to...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Leveraging Social Networks for Increased BitTorrent Robustness
July 7, 2009, 12:00am PDT
In peer-to-peer content delivery systems, such as BitTorrent, there may exist nodes that are non-cooperative and do not contribute their upload bandwidth to the system while still downloading...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Castor: Scalable Secure Routing for Ad Hoc Networks
March 10, 2010, 12:00am PST
Wireless ad hoc networks are inherently vulnerable, as any node can disrupt the communication of potentially any other node in the network. Many solutions to this problem have been proposed. In...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Online Broadcasting With Network Coding
January 1, 2011, 12:00am PST
Consider a source broadcasting M packets to N receivers over independent erasure channels, where perfect feedback is available from the receivers to the source, and the source is allowed to use...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Network-Coded Broadcast: From Canonical Networks to Random Topologies
November 28, 2007, 12:00am PST
The authors consider the problem of finding the minimum number of transmissions in an ad-hoc network for all-to-all broadcasting using network coding. This paper generalizes previous results for...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Network Coding Over Dynamically Changing Networks
November 26, 2008, 12:00am PST
The authors here advocate the case for network coding as a guiding paradigm for the operation of networks that vary in a small time frame, due to node mobility, channel variations, and varying...
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Potentials of Opportunistic Routing in Energy-Constrained Wireless Sensor Networks
November 26, 2008, 12:00am PST
The low quality of wireless links leads to perpetual packet losses. While an acknowledgment mechanism is generally used to cope with these losses, multiple retransmissions nevertheless occur....
Provided by Ecole Polytechnique Federale de Lausanne
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White Papers
Local Binary Patterns as an Image Preprocessing for Face Authentication
January 1, 2011, 12:00am PST
One of the major problems in face authentication systems is to deal with variations in illumination. In a realistic scenario, it is very likely that the lighting condition of the probe image does...
Provided by Ecole Polytechnique Federale de Lausanne
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