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University of Toronto Press Incorporated
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Denial of Service Attacks in Networks With Tiny Buffers
April 8, 2009, 12:00am PDT
Recently, several papers have studied the possibility of shrinking buffer sizes in Internet core routers to just a few dozen packets under certain constraints. If proven right, these results can...
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Adding the Easy Button to the Cloud With SnowFlock and MPI
February 20, 2009, 12:00am PST
Cloud computing promises to provide researchers with the ability to perform parallel computations using large pools of Virtual Machines (VMs), without facing the burden of owning or maintaining...
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Computer Meteorology: Monitoring Compute Clouds
May 16, 2009, 12:00am PDT
Cloud computing environments allow customers to execute arbitrary code on hardware owned by a cloud provider. While cloud providers use virtualization to ensure isolation between customers, they...
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Passive Loss Inference in Wireless Sensor Networks Based on Network Coding
January 27, 2009, 12:00am PST
The highly stochastic nature of wireless environments makes it desirable to monitor link loss rates in wireless sensor networks. This paper studies the loss inference problem in sensor networks...
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Image Authentication Using Added Signal-Dependent Noise
November 15, 2007, 12:00am PST
Image authentication has applications in security systems, photo forensics, and photo journalism. This paper presents an image authentication scheme using added signal-dependent noise....
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Biometric Methods for Secure Communications in Body Sensor Networks: Resource-Efficient Key Management and Signal-Level Data Scrambling
December 21, 2007, 12:00am PST
As electronic communications become more prevalent, mobile and universal, the threats of data compromises also accordingly loom larger. In the context of a Body Sensor Network (BSN), which permits...
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Blackboards, PowerPoint, and Tablet PCs in the Classroom
May 26, 2009, 12:00am PDT
Research into eye movements of subjects who are reading provides a window into the reader's cognitive processes. This paper uses some conclusions of that research to guide a discussion of the...
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Haste: Practical Online Network Coding in a Multicast Switch
December 21, 2009, 12:00am PST
The use of network coding has been shown to improve throughput in input-queued multicast switches, but not without costs of computational complexity and delays. This paper investigates the design...
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Learning Mixture Models With the Latent Maximum Entropy Principle
January 1, 2010, 12:00am PST
The paper presents a new approach to estimating mixture models based on a new inference principle the author has proposed: the Latent Maximum Entropy principle (LME). LME is different both from...
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Multi-channel Live P2P Streaming: Refocusing on Servers
January 14, 2008, 12:00am PST
Peer-to-peer (P2P) has recently gained lot of popularity and success in the commercial sector because of which hundreds of media channels are now able to broadcast to millions of users at any...
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SnowFlock: Rapid Virtual Machine Cloning for Cloud Computing
September 2, 2010, 12:00am PDT
Virtual Machine (VM) fork is a new cloud computing abstraction that instantaneously clones a VM into multiple replicas running on different hosts. This paper focuses on the primitive of VM fork...
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Visualizing Data using t-SNE
November 1, 2008, 12:00am PDT
This paper presents a new technique called "t-SNE" that visualizes high-dimensional data by giving each datapoint a location in a two or three-dimensional map. The technique is a variation of...
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Repatriation Taxes And Foreign Direct Investment: Evidence From Tax Treaties
June 20, 2010, 12:00am PDT
This paper examines the effects on foreign direct investment of worldwide versus territorial tax systems. Canada operates a hybrid system of international taxation, under which dividends...
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BPM in Cloud Architectures: Business Process Management With SLAs and Events
July 22, 2010, 12:00am PDT
Applications are becoming increasingly distributed and loosely coupled in terms of their development processes, software architectures, deployment platforms, and other aspects. For example, in Web...
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Dynamic Resource Allocation for Database Servers Running on Virtual Storage
January 27, 2009, 12:00am PST
This paper introduces a novel multi-resource allocator to dynamically allocate resources for database servers running on virtual storage. Multi-resource allocation involves proportioning the...
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Adaptive Content-Based Routing in General Overlay Topologies
August 18, 2008, 12:00am PDT
This paper develops content-based publish/subscribe algorithms to support general overlay topologies, as opposed to traditional acyclic or tree-based topologies. Among other benefits, message...
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QoS-Aware Adaptive Services in Mobile Ad-Hoc Networks
January 1, 2010, 12:00am PST
Ad-hoc wireless networks consist of mobile nodes interconnected by multi-hop wireless paths. Unlike conventional wireless networks, ad-hoc networks have no fixed network infrastructure or...
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Constructing Complex Semantic Mappings Between XML Data and Ontologies
January 1, 2010, 12:00am PST
Much data is published on the Web in XML format satisfying schemas, and to make the Semantic Web a reality, such data needs to be interpreted with respect to ontologies. Interpretation is achieved...
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Content-Based Routing in Mobile Ad Hoc Networks
January 1, 2010, 12:00am PST
The publish/subscribe model of communication provides sender/receiver decoupling and selective information dissemination that is appropriate for mobile environments characterized by scarce...
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Distributed Cross-Layer Optimization of Wireless Sensor Networks: A Game Theoretic Approach
January 1, 2010, 12:00am PST
This paper proposes a distributed optimization framework for wireless multihop sensor networks base on a game theoretic approach. The authors show that the cross-layer optimization problem can be...
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Wireless Communication Systems
January 1, 2010, 12:00am PST
Wireless communications networks to provide telephone service to mobile users have been rapidly developed in the past 15 years. Beginning with the first generation analog systems which provide...
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CodeOR: Opportunistic Routing in Wireless Mesh Networks With Segmented Network Coding
September 5, 2008, 12:00am PDT
Opportunistic routing significantly increases unicast throughput in wireless mesh networks by effectively utilizing the wireless broadcast medium. With network coding, opportunistic routing can be...
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Teaching Old Caches New Tricks: RegionTracker and Predictor Virtualization
July 5, 2009, 12:00am PDT
On-chip last-level caches are increasing to tens of megabytes to accommodate applications with large memory footprints and to compensate for high memory latencies and limited off-chip bandwidth....
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Tamper Resistant Network Tracing
October 25, 2007, 12:00am PDT
Raw network traces can be used to compromise the privacy of Internet users. For this reason, many ISPs are reluctant to collect network traces - they often regard possession of such traces as a...
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Dude, Where's That IP? Circumventing Measurement-Based IP Geolocation
May 31, 2010, 12:00am PDT
Many applications of IP geolocation can benefit from geolocation that is robust to adversarial clients. These include applications that limit access to online content to a specific geographic...
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SLA-Driven Business Process Management in SOA
October 1, 2007, 12:00am PDT
In a Service-Oriented Architecture (SOA), distributed applications are built by orchestrating reusable services using high-level workflows or business processes. The complexity of developing and...
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Monitoring and Recovery of Web Service Applications
November 10, 2010, 12:00am PST
For a system of distributed processes, correctness can be ensured by (Statically) checking whether their composition satisfies properties of interest. However, web services are distributed...
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Optimizing Computation of Recovery Plans for BPEL Applications
August 25, 2010, 12:00am PDT
A BPEL application is an orchestration of (Possibly third-party) web services. These services, which can be written in a variety of languages, communicate through published interfaces. Third-party...
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PTYASM: Software Model Checking With Proof Templates
July 28, 2008, 12:00am PDT
This paper describes PTYASM, an enhanced version of the YASM software model checker which uses proof templates. These templates associate correctness arguments with common programming idioms, thus...
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Property Patterns for Runtime Monitoring of Web Service Conversations
January 15, 2008, 12:00am PST
For a system of distributed processes, correctness can be ensured by statically checking whether their composition satisfies the properties of interest. However, web services are distributed...
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Characterizing Residential Broadband Networks
August 28, 2007, 12:00am PDT
A large and rapidly growing proportion of users connect to the Internet via residential broadband networks such as Digital Subscriber Lines (DSL) and cable. Residential networks are often the...
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Leveraging Personal Devices for Stronger Password Authentication From Untrusted Computers
February 1, 2010, 12:00am PST
Internet authentication for popular end-user transactions, such as online banking and e-commerce, continues to be dominated by passwords entered through end-user Personal Computers (PCs). Most...
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A Generic Framework for Mobility Modeling and Performance Analysis in Next-Generation Heterogeneous Wireless Networks
July 9, 2007, 12:00am PDT
The integration of different wireless radio cellular technologies is emerging as an effective approach to accommodate the increasing demand of next-generation multi-media based applications. In...
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Stochastic Rate Control for Scalable VBR Video Streaming Over Wireless Networks
August 14, 2009, 12:00am PDT
Video streaming over wireless links is a challenging problem due to both the unreliable, time-varying nature of the wireless channel and the stringent delivery requirements of media traffic....
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Distributed Minimum Energy Data Gathering and Aggregation in Sensor Networks
January 1, 2011, 12:00am PST
Recent technological advances have enabled the production of low-cost sensor nodes. These sensor nodes are small in size, and are equipped with limited sensing, processing, and transmission...
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Buffer Schemes for VBR Video Streaming Over Heterogeneous Wireless Networks
March 2, 2009, 12:00am PST
With the co-existence of different wireless networks, which exhibit largely different bandwidth and coverage characteristics, much interest has been involved in integrating these networks to...
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SlideOR: Online Opportunistic Network Coding in Wireless Mesh Networks
December 21, 2009, 12:00am PST
Opportunistic routing significantly increases unicast throughput in wireless mesh networks by effectively utilizing the wireless broadcast medium. With network coding, opportunistic routing can be...
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Dynamic Control of Tunable Sub-Optimal Algorithms for Scheduling of Time-Varying Wireless Networks
April 2, 2008, 12:00am PDT
It is well known that the Generalized Max-Weight Matching (GMWM) scheduling policy, and in general throughput optimal scheduling policies, often require the solution of a complex optimization...
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Structured Admission Control Policy in Heterogeneous Wireless Networks With Mesh Underlay
November 26, 2009, 12:00am PST
This paper investigates into optimal admission control policies for Heterogeneous Wireless Networks (HWN), considering an integration of wireless mesh networks with an overlaying cellular...
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Efficient Structured Policies for Admission Control in Heterogeneous Wireless Networks
December 1, 2007, 12:00am PST
In the near future, demand for Heterogeneous Wireless Networking (HWN) is expected to increase. QoS provisioning in these networks is a challenging issue considering the diversity in wireless...
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Whitepapers
Defected Ground Structures (DGS) and Uniplanar Compact-Photonic Band Gap (UC-PBG) Structures for Reducing the Size and Enhancing the Out-of-Band Rejection of Microstrip Bandpass Ring Resonator Filters
November 1, 2008, 12:00am PDT
In this paper, the authors addresses a modified bandpass ring resonator filter providing compact size, low insertion-loss, wide bandwidth, sharp rejection and suppressed higher order modes....
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Information Model for Model Driven Safety Requirements Management of Complex Systems
May 29, 2010, 12:00am PDT
The aim of this paper is to propose a rigorous and complete design framework for complex system based on System Engineering (SE) principles. The SE standard EIA-632 is used to guide the approach....
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Opportunistic Secondary Spectrum Sharing Protocols for Primary Implementing an IR Type Hybrid-ARQ Protocol
February 16, 2012, 12:00am PST
In this paper, the authors propose, analyze and compare three different methods for opportunistic spectrum sharing access when the primary user's implements an Incremental Redundancy (IR) type...
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Whitepapers
Reliable Multicast Transport of BGP for Geostationary Satellite Networks
May 24, 2012, 12:00am PDT
Initially deployed for TV broadcasting, geostationary satellite networks and DVB standards have become mature technologies for IP communications. Also used to interconnect wide IP networks,...
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Whitepapers
Oruta: Privacy-Preserving Public Auditing for Shared Data in the Cloud
May 5, 2012, 12:00am PDT
With cloud storage services, it is commonplace for data to be not only stored in the cloud, but also shared across multiple users. However, public auditing for such shared data - while preserving...
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A General and Practical Datacenter Selection Framework for Cloud Services
May 2, 2012, 12:00am PDT
Many cloud services nowadays are running on top of geographically distributed infrastructures for better reliability and performance. They need an effective way to direct the user requests to a...
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Cost Efficient Datacenter Selection for Cloud Services
June 30, 2012, 12:00am PDT
Many cloud services nowadays are running on top of geographically distributed infrastructures for better reliability and performance. They need an effective way to direct the user requests to a...
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Seen as Stable Marriages
January 19, 2011, 12:00am PST
In this paper, the authors advocate the use of stable matching framework in solving networking problems, which are traditionally solved using utility-based optimization or game theory. Born in...
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A Secondary Market for Spectrum
December 10, 2009, 12:00am PST
Dynamic spectrum trading amongst small cognitive users is fundamentally different along two axes: temporal variation, and spatial variation of user demands and channel conditions. The authors...
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MixApart: Decoupled Analytics for Shared Storage Systems
May 10, 2012, 12:00am PDT
Data analytics and enterprise applications have very different storage functionality requirements. For this reason, enterprise deployments of data analytics are on a separate storage silo. This...
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Distributional Measures of Semantic Distance: A Survey
March 8, 2012, 12:00am PST
The ability to mimic human notions of semantic distance has widespread applications. Some measures rely only on raw text (distributional measures) and some rely on knowledge sources such as...
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AutoFuzz: Automated Network Protocol Fuzzing Framework
August 1, 2010, 12:00am PDT
Assessing software security involves steps such as code review, risk analysis, penetration testing and fuzzing. During the fuzzing phase, the testeras goal is to find flaws in software by sending...
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SigNet: Network-on-Chip Filtering for Coarse Vector Directories
December 9, 2009, 12:00am PST
Scalable cache coherence is imperative as systems move into the many-core era with cores counts numbering in the hundreds. Directory protocols are often favored as more scalable in terms of...
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Supporting Efficient Collective Communication in NoCs
January 6, 2012, 12:00am PST
Across many architectures and parallel programming paradigms, collective communication plays a key role in performance and correctness. Hardware support is necessary to prevent important...
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A High-Throughput Overlay Multicast Infrastructure With Network Coding
January 1, 2012, 12:00am PST
Network coding has been recently proposed in information theory as a new dimension of the information multicast problem that helps achieve optimal transmission rate or cost. End hosts in overlay...
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SFlow: Towards Resource-Efficient and Agile Service Federation in Service Overlay Networks
January 1, 2012, 12:00am PST
Existing research work towards the composition of complex federated services has assumed that service requests and deliveries flow through a particular service path or tree. In this paper, the...
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Network Coding: The Case of Multiple Unicast Sessions
December 3, 2010, 12:00am PST
In this paper, the authors investigate the benefit of network coding over routing for multiple independent unicast transmissions. They compare the maximum achievable throughput with network coding...
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Truthful Spectrum Auction Design for Secondary Networks
January 14, 2012, 12:00am PST
Opportunistic wireless channel access by non-licensed users has emerged as a promising solution for addressing the bandwidth scarcity challenge. Auctions represent a natural mechanism for...
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Maximizing Revenue With Dynamic Cloud Pricing: The Infinite Horizon Case
February 8, 2012, 12:00am PST
The authors study the infinite horizon dynamic pricing problem for an infrastructure cloud provider in the emerging cloud computing paradigm. The cloud provider, such as Amazon, provides computing...
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Bargaining Towards Maximized Resource Utilization in Video Streaming Datacenters
March 23, 2012, 12:00am PDT
Datacenters can be used to host large-scale video streaming services with better operational efficiency, as the multiplexing achieved by virtualization technologies allows different videos to...
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Quality-Assured Cloud Bandwidth Auto-Scaling for Video-on-Demand Applications
January 16, 2012, 12:00am PST
There has been a recent trend that Video-on-Demand (VoD) providers such as Netflix are leveraging resources from cloud services for multimedia streaming. In this paper, the authors consider the...
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A Theory of Cloud Bandwidth Pricing for Video-on-Demand Providers
January 15, 2012, 12:00am PST
Current-generation cloud computing is offered with usage-based pricing, with no bandwidth capacity guarantees, which is however unappealing to bandwidth-intensive applications such as...
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Towards Optimal Capacity Segmentation With Hybrid Cloud Pricing
April 1, 2012, 12:00am PDT
Cloud resources are usually priced in multiple markets with different service guarantees. For example, Amazon EC2 prices virtual instances under three pricing schemes - the subscription option...
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Postcard: Minimizing Costs on Inter-Datacenter Traffic With Store-and-Forward
April 1, 2012, 12:00am PDT
It is typical for cloud providers to operate a number of geographically distributed datacenters, where inter-datacenter traffic constitutes a large portion of a cloud provider's traffic demand...
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Reliable Network Coded MAC in Vehicular Ad-Hoc Networks
September 29, 2010, 12:00am PDT
The authors consider the problem of designing cooperative driver assistance and collision warning systems in vehicular networks. In this problem each car has a small size state information message...
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Distributed Optimal TXOP Control for Throughput Requirements in IEEE 802.11e Wireless LAN
December 22, 2011, 12:00am PST
This paper designs a distributed Transmission OPportunity (TXOP) adaptation algorithm for IEEE802.11e Enhanced Distributed Channel Access (EDCA). Each node measures its throughput in a window and...
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Completion Delay Reduction in Lossy Feedback Scenarios for Instantly Decodable Network Coding
July 15, 2011, 12:00am PDT
In this paper, the authors study the effect of packet feedback loss events on the broadcast completion delay performance of instantly decodable network coding. These feedback loss events result in...
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On-Demand Cluster Analysis for Product Line Functional Requirements
May 19, 2008, 12:00am PDT
The authors propose an on-demand clustering framework for analyzing the functional requirements in a product line. Their approach is novel in that the objects to be clustered capture the domain's...
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Extracting and Modeling Product Line Functional Requirements
June 13, 2008, 12:00am PDT
The authors introduce an extractive approach to building a product line's requirements assets. They define the Functional Requirements Profiles (FRPs) according to the linguistic characterization...
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Hypervisor Support for Identifying Covertly Executing Binaries
May 7, 2008, 12:00am PDT
Hypervisors have been proposed as a security tool to defend against malware that subverts the OS kernel. However, hypervisors must deal with the semantic gap between the low-level information...
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MANET Extensions to Ns2
January 1, 2012, 12:00am PST
This is a set of software modules providing additional models for the simulation of multi-hop Mobile Ad hoc NETworks (MANETs) in the ns2 simulator. The authors provide implementations of the CM...
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Optimal Trace Compaction With Property Preservation
June 9, 2009, 12:00am PDT
Debugging design errors is a challenging manual task which requires the analysis of long simulation traces. Trace compaction techniques help engineers analyze the cause of the problem by reducing...
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Leveraging Dominators for Preprocessing QBF
December 16, 2009, 12:00am PST
Many CAD for VLSI problems can be naturally encoded as Quantified Boolean Formulas (QBFs) and solved with QBF solvers. Furthermore, such problems often contain circuit-based information that is...
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An Automated Framework for Correction and Debug of PSL Assertions
December 6, 2010, 12:00am PST
Functional verification is becoming a major bottleneck in modern VLSI design flows. To manage this growing problem, assertion-based verification has been adopted as one of the key technologies to...
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Managing Complexity in Design Debugging With Sequential Abstraction and Refinement
November 6, 2010, 12:00am PDT
Design debugging is becoming an increasingly difficult task in the VLSI design flow with the growing size of modern designs and their error traces. In this paper, a novel abstraction and...
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Automated Debugging of SystemVerilog Assertions
November 23, 2010, 12:00am PST
In the last decade, functional verification has become a major bottleneck in the design flow. To relieve this growing burden, assertion-based verification has gained popularity as a means to...
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From RTL to Silicon: The Case for Automated Debug
January 1, 2012, 12:00am PST
Computer-aided design tools are continuously improving their scalability and efficiency to mitigate the high cost associated with designing and fabricating modern VLSI systems. A key step in the...
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Efficient Debugging of Multiple Design Errors
November 6, 2011, 12:00am PDT
After functional verification detects a failure, design debugging aims to find all locations in the design that could be responsible for the observed error. The task of debugging becomes more...
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Automated Data Analysis Techniques for a Modern Silicon Debug Environment
January 1, 2012, 12:00am PST
With the growing size of modern designs and more strict time-to-market constraints, design errors unavoidably escape pre-silicon verification and reside in silicon prototypes. As a result, silicon...
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On Error Tolerance and Engineering Change With Partially Programmable Circuits
November 16, 2011, 12:00am PST
The growing size, density and complexity of modern VLSI chips are contributing to an increase in hardware faults and design errors in the silicon, decreasing manufacturing yield and increasing the...
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