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University of Wisconsin
(202 results)-
White Papers
Accurate and Efficient Mode Acceleration Data Recovery for Superelement Models
January 1, 2009, 12:00am PST
Procedures are described for accurate and efficient mode acceleration data recovery of transient responses for superelement models. The procedures are more accurate than MSC/NASTRAN's standard...
Provided by University of Wisconsin
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White Papers
Proactive Attacker Localization in Wireless LAN
April 1, 2009, 12:00am PDT
This paper addresses the open problem of locating an attacker that intentionally hides or falsifies its position using advanced radio technologies. A novel attacker localization mechanism, called...
Provided by University of Wisconsin
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White Papers
VMware Virtualization and Software Development
May 29, 2008, 12:00am PDT
Virtualization technology has recently matured to the point where it can be used dependably on a daily basis by anyone. Computer virtualization is the idea of running virtual computer(s) inside of...
Provided by University of Wisconsin
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White Papers
Unraveling the Complexity of Network Management
February 25, 2009, 12:00am PST
Operator interviews and anecdotal evidence suggest that an operator's ability to manage a network decreases as the network becomes more complex. However, there is currently no way to...
Provided by University of Wisconsin
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White Papers
Extensible and Scalable Network Monitoring Using OpenSAFE
April 7, 2010, 12:00am PDT
Administrators of today's networks are highly interested in monitoring traffic for purposes of collecting statistics, detecting intrusions, and providing forensic evidence. Unfortunately, network...
Provided by University of Wisconsin
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White Papers
Supporting Continuous Mobility through Multi-rate Wireless Packetization
April 9, 2008, 12:00am PDT
The main interest of the architecture supporting continuous mobility through multi- rate packetization is to give geographical location independence to the WiFi device- users. One can...
Provided by University of Wisconsin
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White Papers
Cloud Computing: The Changing Face of Computer Science
November 1, 2009, 12:00am PDT
The way people use computers is changing. Instead of data and programs being contained on the device of users, they will be held on servers in a server farm, and users will access the content via...
Provided by University of Wisconsin
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White Papers
Scientific Workflow Management by Database Management
January 1, 2010, 12:00am PST
In several working environments, production involves repeated executions of certain procedures. A workflow describes the individual tasks performed in these procedures and their...
Provided by University of Wisconsin
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White Papers
Bridging the Distance: Implementing Videoconferencing in Wisconsin
October 30, 2007, 12:00am PDT
The use of videoconferencing in both the public and private sectors continues to increase. Numerous organizations are taking advantage of the technology to reduce travel expenses, increase...
Provided by University of Wisconsin
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White Papers
Laying the Foundation for the Investigation of the Quality of Service for Resource Management in Grid Computing
January 1, 2010, 12:00am PST
By pooling the resources of virtually any functional machine, grids have quickly become a powerful, low-cost, attractive solution in a number of application domains. As a result of the surge in...
Provided by University of Wisconsin
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White Papers
Nest - A Grid Enabled Storage Appliance
January 1, 2010, 12:00am PST
This paper describes NeST, a flexible software-only storage appliance designed to meet the storage needs of the Grid. NeST has three key features that make it well suited for deployment in a Grid...
Provided by University of Wisconsin
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White Papers
Phase III: Data Recovery and Mitigation
January 1, 2010, 12:00am PST
Data recovery may be undertaken as a form of mitigation at an archeological site determined eligible for listing on the National Register of Historic Places and that will be impacted by a proposed...
Provided by University of Wisconsin
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White Papers
A DBMS Engine Simulator to Assist in Classroom Understanding of Oracle Query Execution
January 1, 2010, 12:00am PST
Oracle's DBMS query execution process consists of a complicated series of steps which can be difficult for many students and professionals to understand. It is also difficult to find resources...
Provided by University of Wisconsin
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White Papers
Impact of Disk Corruption on Open-Source DBMS
October 19, 2009, 12:00am PDT
Despite the best intentions of disk and RAID manufacturers, on-disk data can still become corrupted. This paper examines the effects of corruption on database management systems. Through injecting...
Provided by University of Wisconsin
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White Papers
Peeking Into the Cloud: Toward User-Driven Cloud Management
March 24, 2010, 12:00am PDT
The emergence and growing popularity of cloud computing signals an evolution in the way IT infrastructure and services are delivered and consumed. Cloud services have a number of essential...
Provided by University of Wisconsin
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White Papers
Multi-View 3D Geometry Reconstruction: Exploiting Massive Parallelism
December 24, 2009, 12:00am PST
3D geometric reconstruction from digital images captured from consumer cameras is an inexpensive, but computationally demanding application. In this experimental study, the authors have explored...
Provided by University of Wisconsin
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White Papers
Live Migration of Direct-Access Devices
November 3, 2008, 12:00am PST
Virtual machine migration greatly aids management by allowing flexible provisioning of resources and decommissioning of hardware for maintenance. However, efforts to improve network performance by...
Provided by University of Wisconsin
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White Papers
Scalable Distributed Process Group Control and Inspection via the File System
December 14, 2008, 12:00am PST
The size of distributed systems is rapidly expanding to meet the computational demands of the world. The largest current distributed systems for corporate intranets, High-Performance Computing...
Provided by University of Wisconsin
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White Papers
The Case for Fine-Grained Traffic Engineering in Data Centers
June 3, 2010, 12:00am PDT
In recent years, several techniques have been suggested for routing and traffic engineering in data centers. However, not much is known about how these techniques perform relative to each other...
Provided by University of Wisconsin
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White Papers
Keepin' It Real: Semi-Supervised Learning With Realistic Tuning
April 16, 2009, 12:00am PDT
The authors address two critical issues involved in applying Semi-Supervised Learning (SSL) to a real-world task: parameter tuning and choosing which (If any) SSL algorithm is best suited for the...
Provided by University of Wisconsin
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White Papers
Model Evolution: An Incremental Approach to Non-Rigid Structure From Motion
March 31, 2010, 12:00am PDT
In this paper, the authors present a new framework for Non-Rigid Structure From Motion (NRSFM) that simultaneously addresses three significant challenges: severe occlusion, perspective camera...
Provided by University of Wisconsin
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White Papers
Dynamic Processors Demand Dynamic Operating Systems
June 9, 2010, 12:00am PDT
The rise of multicore processors has lead to techniques that dynamically vary the set and characteristics of cores or threads available to the operating system. For example, Core Fusion merges...
Provided by University of Wisconsin
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White Papers
Adapting to Intermittent Faults in Future Multicore Systems
July 10, 2007, 12:00am PDT
As technology continues to scale, future multicore processors become more susceptible to a variety of hardware failures. In particular, intermittent faults are expected to become especially...
Provided by University of Wisconsin
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White Papers
WrtVMM: A Virtual Machine Monitor for Embedded Devices
December 21, 2009, 12:00am PST
The authors built a virtual machine monitor for the Linksys WRT54GL wireless router to run Embedded Xinu as a guest OS within OpenWrt. The system uses a kernel module and signal handlers to...
Provided by University of Wisconsin
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White Papers
Xen-Ophobia: On Profiling Boot Startup
May 15, 2008, 12:00am PDT
The fact that systems fail should come as no surprise to anymore who has ever developed or worked on a system. A failure reduces the availability of the system and hence the productivity of...
Provided by University of Wisconsin
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White Papers
Grid Enabled Optimization With GAMS
September 1, 2007, 12:00am PDT
The authors describe a framework for modeling optimization problems for solution on a grid computer. The framework is easy to adapt to multiple grid engines, and can seamlessly integrate evolving...
Provided by University of Wisconsin
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White Papers
E-Mobile: A Heterogeneous Agent-Based, Remote Off-Loading Framework for Efficient Energy Management of Mobile Devices
December 22, 2009, 12:00am PST
Web applications are becoming increasingly popular on mobile/wireless devices. As more desktop applications that are inherently computational intensive and resource-demanding are being ported to...
Provided by University of Wisconsin
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White Papers
Corona: System Implications of Emerging Nanophotonic Technology
March 17, 2008, 12:00am PDT
The authors expect that many-core microprocessors will push performance per chip from the 10 gigaflop to the 10 teraflop range in the coming decade. To support this increased performance, memory...
Provided by University of Wisconsin
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White Papers
Reducing Overhead for Soft Error Coverage in High Availability Systems
December 21, 2007, 12:00am PST
High reliability/availability systems typically use redundant computation and components to achieve detection, isolation and recovery from faults. Chip multiprocessors (CMPs) incorporate multiple...
Provided by University of Wisconsin
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White Papers
Fast Semi-Supervised SVM Classifiers Using A-Priori Metric Information
June 26, 2007, 12:00am PDT
This paper describes a Support Vector Machine-based (SVM) parametric optimization method for semi-supervised classification, called LIAM (for LInear hyperplane classifier with A-priori Metric...
Provided by University of Wisconsin
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White Papers
High Throughput Data Transfers Using the Tornado Transport Protocol
January 1, 2011, 12:00am PST
The need to transfer extremely large files over very high bandwidth network paths is becoming more and more common. Current window based transport protocols often limit throughput to a level well...
Provided by University of Wisconsin
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White Papers
Evaluating and Modeling Window Synchronization in Highly Multiplexed Flows
January 1, 2011, 12:00am PST
In this paper, the authors investigate issues of synchronization in highly aggregated flows such as would be found in the Internet backbone. Understanding this phenomenon is important since it...
Provided by University of Wisconsin
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White Papers
A Learning-Based Approach for IP Geolocation
October 9, 2009, 12:00am PDT
The ability to pinpoint the geographic location of IP hosts is compelling for applications such as on-line advertising and network at-tack diagnosis. While prior methods can accurately identify...
Provided by University of Wisconsin
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White Papers
Traffic Anomaly Detection at Fine Time Scales With Bayes Nets
April 17, 2008, 12:00am PDT
Traffic anomaly detection using high performance measurement systems offers the possibility of improving the speed of detection and enabling detection of important, short-lived anomalies. In this...
Provided by University of Wisconsin
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White Papers
Resource Deployment Based on Autonomous System Clustering
January 1, 2011, 12:00am PST
Effective placement of resources used to support distributed services in the Internet depends on an accurate representation of Internet topology and routing. Representations of Autonomous System...
Provided by University of Wisconsin
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White Papers
An SLA Perspective on the Router Buffer Sizing Problem
October 29, 2007, 12:00am PDT
In this paper, the authors discuss recent work on buffer sizing in the context of an ISP's need to offer and guarantee competitive Service Level Agreements (SLAs) to its customers. Since SLAs...
Provided by University of Wisconsin
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White Papers
Using Slicing to Identify Duplication in Source Code
January 1, 2011, 12:00am PST
Programs often have a lot of duplicated code, which makes both understanding and maintenance more difficult. This problem can be alleviated by detecting duplicated code, extracting it into a...
Provided by University of Wisconsin
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White Papers
Failure Analysis of SGI XFS File System
January 1, 2011, 12:00am PST
Commodity file systems expect a fail stop disk. But to-days disks fail in unexpected ways. Disks exhibit latent sector errors, silent corruption and transient failures to name a few. In this paper...
Provided by University of Wisconsin
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White Papers
Analyzing Capsicum for Usability and Performance
December 23, 2010, 12:00am PST
In this paper the author investigates Capsicum, an ex-tension to UNIX that introduces a new security model on top of existing UNIX architecture. This model consists of several new security...
Provided by University of Wisconsin
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White Papers
Multi-Byte Regular Expression Matching With Speculation
October 14, 2009, 12:00am PDT
Intrusion prevention systems determine whether incoming traffic matches a database of signatures, where each signature in the database represents an attack or a vulnerability. IPSs need to keep up...
Provided by University of Wisconsin
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Whitepapers
Live Update for Device Drivers
March 27, 2008, 12:00am PDT
As commodity operating systems become more reliable and fault-tolerant, the availability of a system will be determined not by when it crashes, but instead by when it must be shutdown and rebooted...
Provided by University of Wisconsin
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Whitepapers
Analyzing the Effects of Disk-Pointer Corruption
March 17, 2008, 12:00am PDT
The long-term availability of data stored in a file system depends on how well it safeguards on-disk pointers used to access the data. Ideally, a system would correct all pointer errors. In this...
Provided by University of Wisconsin
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Whitepapers
Decaf: Moving Device Drivers to a Modern Language
April 20, 2009, 12:00am PDT
Writing code to interact with external devices is inherently difficult, and the added demands of writing device drivers in C for kernel mode compounds the problem. This environment is complex and...
Provided by University of Wisconsin
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Whitepapers
Tolerating Hardware Device Failures in Software
August 5, 2009, 12:00am PDT
Hardware devices can fail, but many drivers assume they do not. When confronted with real devices that misbehave, these assumptions can lead to driver or system failures. While major operating...
Provided by University of Wisconsin
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Whitepapers
FlashVM: Virtual Memory Management on Flash
May 10, 2010, 12:00am PDT
With the decreasing price of flash memory, systems will increasingly use solid-state storage for virtual-memory paging rather than disks. FlashVM is a system architecture and a core virtual memory...
Provided by University of Wisconsin
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Whitepapers
Reducing Memory Reference Energy With Opportunistic Virtual Caching
June 5, 2012, 12:00am PDT
Most modern cores perform a highly-associative Translation Look aside Buffer (TLB) lookup on every memory access. These designs often hide the TLB lookup latency by overlapping it with L1 cache...
Provided by University of Wisconsin
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Whitepapers
Towards Energy-Efficient Database Cluster Design
August 9, 2012, 12:00am PDT
Energy is a growing component of the operational cost for many "Big data" deployments, and hence has become increasingly important for practitioners of large-scale data analysis who require...
Provided by University of Wisconsin
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Whitepapers
Obtaining Representative Measurements of Cellular Network Performance
May 11, 2012, 12:00am PDT
Network service providers, and other parties, require an accurate understanding of the performance cellular networks deliver to users. In particular, they often seek a measure of the network...
Provided by University of Wisconsin
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Whitepapers
Scheduling Routing Table Calculations to Achieve Fast Convergence in OSPF Protocol
June 20, 2008, 12:00am PDT
Fast convergence to topology changes is now a key requirement in routing infrastructures while reducing the routing protocol's processing overhead continues to be as important as before. In this...
Provided by University of Wisconsin
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Whitepapers
Analyzing the Hold Time Schemes to Limit the Routing Table Calculations in OSPF Protocol
June 15, 2009, 12:00am PDT
OSPF is a popular interior gateway routing protocol. Commercial OSPF routers limit their processing load by using a hold time between successive routing table calculations as new Link State...
Provided by University of Wisconsin
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Whitepapers
Enhancing Simulation Mode Operation of Ospfd
December 3, 2009, 12:00am PST
In this paper, the authors describe their modifications to ospfd, a popular open-source implementation of OSPF routing protocol. The ospfd software can also be run in simulation mode, where...
Provided by University of Wisconsin
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Whitepapers
A Passive Measurement System for Network Testbeds
May 24, 2012, 12:00am PDT
The ability to capture and process packet-level data is of intrinsic importance in network testbeds that offer broad experimental capabilities to researchers. In this paper, the authors describe...
Provided by University of Wisconsin
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White Papers
Phantom: Physical Layer Cooperation for Location Privacy Protection
January 15, 2012, 12:00am PST
Localization techniques that allow inferring the location of wireless devices directly from received signals have exposed mobile users to new threats. Adversaries can easily collect required...
Provided by University of Wisconsin
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White Papers
Design and Performance of Distributed Mechanisms for Flow Admission in Wireless Adhoc Networks
November 29, 2011, 12:00am PST
Given a wireless network where some pairs of communication links interfere with each other, the authors study sufficient conditions for determining whether a given set of minimum bandwidth...
Provided by University of Wisconsin
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White Papers
PIE in the Sky: Online Passive Interference Estimation for Enterprise WLANs
March 4, 2011, 12:00am PST
Trends in enterprise WLAN usage and deployment point to the need for tools that can capture interference in real time. A tool for interference estimation can not only enable WLAN managers to...
Provided by University of Wisconsin
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White Papers
On the Success of Network Topology Inference Using a Markov Random Walk Model for Nested Routing Policies
October 18, 2010, 12:00am PDT
Network topology inference is a topic of ongoing interest, as researchers continue to try to identify the topology of the internet, other networks, and the people own networks for maintenance...
Provided by University of Wisconsin
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White Papers
ScalaQL: Language-Integrated Database Queries for Scala
September 13, 2009, 12:00am PDT
One of the most ubiquitous elements of modern computing is the relational database. Very few modern applications are created with-out some sort of database back-end. Unfortunately, relational...
Provided by University of Wisconsin
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White Papers
Towards a Model-Driven Approach for Reverse Engineering Design Patterns
September 13, 2009, 12:00am PDT
The size and complexity of software systems is rapidly increasing. Meanwhile, the ability to understand and maintain such systems is decreasing almost as fast. Model Driven Engineering (MDE)...
Provided by University of Wisconsin
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White Papers
Polymorphic Type Inference for Scripting Languages With Object Extensions
October 23, 2011, 12:00am PDT
This paper presents a polymorphic type inference algorithm for a small subset of JavaScript. The goal is to prevent accessing undefined members of objects. The authors define a type system that...
Provided by University of Wisconsin
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White Papers
Manual Vs. Automated Vulnerability Assessment
May 27, 2009, 12:00am PDT
The dream of every software development team is to assess the security of their software using only a tool. In this paper, the authors attempt to evaluate and quantify the effectiveness of...
Provided by University of Wisconsin
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White Papers
Secret Key Generation Through OFDM Multipath Channel
February 24, 2011, 12:00am PST
The authors analyze the fundamental limits of key generation and describe an implementation based on error correcting codes. They show that key extraction based on channel coefficients...
Provided by University of Wisconsin
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White Papers
Optimal Scheduling Policies With Mutual Information Accumulation in Wireless Networks
July 28, 2011, 12:00am PDT
In this paper, the authors aim to develop scheduling policies to maximize the stability region of a wireless network under the assumption that mutual information accumulation is implemented at the...
Provided by University of Wisconsin
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White Papers
Heterogeneity in Large Scale Low-Power Ad-Hoc Wireless Sensor Networks
January 1, 2011, 12:00am PST
Wireless sensor networks have recently become a growing area of research and development due to the tremendous number of applications that can greatly benefit from such systems. In the past the...
Provided by University of Wisconsin
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White Papers
How National And International Financial Development Affect Industrial R&D
May 1, 2011, 12:00am PDT
The authors examine the impacts of both domestic and international financial market development on R&D intensities in 22 manufacturing industries in 18 OECD countries for the period 1990- 2003....
Provided by University of Wisconsin
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White Papers
Liquidity, Risk, And Occupational Choices
December 1, 2010, 12:00am PST
The authors explore which financial constraints matter the most in the choice of becoming an entrepreneur. They consider a randomly assigned welfare program in rural Mexico and show that cash...
Provided by University of Wisconsin
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White Papers
Financial Crises And Labor Market Turbulence
March 24, 2010, 12:00am PDT
Financial crises cause a significant reallocation of labor as relative prices change drastically and economies confront a variety of shocks. Using household survey data for Mexico, the authors...
Provided by University of Wisconsin
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White Papers
Fingerprinting 802.11 Rate Adaptation Algorithms
March 10, 2011, 12:00am PST
The effectiveness of rate adaptation algorithms is an important determinant of 802.11 wireless network performance. The diversity of algorithms that has resulted from efforts to improve rate...
Provided by University of Wisconsin
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White Papers
DomainImpute: Inferring Unseen Components in the Internet
January 14, 2011, 12:00am PST
Despite many efforts over the past decade, the ability to generate topological maps of the Internet at the router-level accurately and in a timely fashion remains elusive. Mapping campaigns...
Provided by University of Wisconsin
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White Papers
Flexible Traffic and Host Profiling Via DNS Rendezvous
March 16, 2011, 12:00am PDT
The ability to accurately classify network traffic and to perform timely detection of the presence of unwanted classes of traffic has important implications for network operations and security. In...
Provided by University of Wisconsin
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White Papers
Power-Awareness Extensions for Network Testbeds
March 10, 2011, 12:00am PST
The escalation in power consumption of networking and communications equipment is of concern to technologists and environmentalists alike. Understanding how and when networking devices consume...
Provided by University of Wisconsin
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White Papers
Multi-Rate Wireless Packets
October 22, 2007, 12:00am PDT
The authors introduce Multi-rate packets - packets in which different segments of the Protocol Data Unit are modulated at different rates. This is a departure from conventional modulation...
Provided by University of Wisconsin
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White Papers
Dynamic Interference Adaptation for Wireless Mesh Networks
January 1, 2011, 12:00am PST
Most wireless meshes will have to operate within the crowded unlicensed spectrum that is also shared by numerous uncoordinated 802.11 hotspots. This creates an unpredictable and variable spectrum...
Provided by University of Wisconsin
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White Papers
Are Any Growth Theories Robust?
September 7, 2007, 12:00am PDT
This paper investigates the strength of empirical evidence for various growth theories when there is model uncertainty with respect to the correct growth model. Using model averaging methods, the...
Provided by University of Wisconsin
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White Papers
Creating Vulnerability Signatures Using Weakest Preconditions
May 29, 2007, 12:00am PDT
Signature-based tools such as network intrusion detection systems are widely used to protect critical systems. Automatic signature generation techniques are needed to enable these tools due to the...
Provided by University of Wisconsin
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White Papers
Updates for Structure Indexes
January 1, 2011, 12:00am PST
The problem of indexing path queries in semistructured/XML databases has received considerable attention recently, and several proposals have advocated the use of structure indexes as supporting...
Provided by University of Wisconsin
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White Papers
Evaluating GPUs for Network Packet Signature Matching
February 25, 2009, 12:00am PST
Modern network devices employ deep packet inspection to enable sophisticated services such as intrusion detection, traffic shaping, and load balancing. At the heart of such services is a signature...
Provided by University of Wisconsin
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White Papers
Detecting and Measuring Similarity in Code Clones
March 20, 2009, 12:00am PDT
Most previous work on code-clone detection has focused on finding identical clones, or clones that are identical up to identifiers and literal values. However, it is often important to find...
Provided by University of Wisconsin
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White Papers
Flash Aware RAID
April 27, 2009, 12:00am PDT
Flash based SSDs are increasing in popularity, performance, and capacity. The advancements made in capacity come at a cost of decreased reliability. Traditional error correcting codes capable of...
Provided by University of Wisconsin
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White Papers
TRAC: An Architecture for Real-Time Dissemination of Vehicular Traffic Information
August 1, 2007, 12:00am PDT
Disseminating traffic related information to vehicular users is increasingly becoming a necessity nowadays in the context of Intelligent Transportation Systems (ITS). However, till date there does...
Provided by University of Wisconsin System
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White Papers
Adapting to Intermittent Faults in Multicore Systems
August 1, 2007, 12:00am PDT
Future multicore processors will become more susceptible to a variety of hardware failures. In particular, intermittent faults, caused in part by manufacturing process variation or in-progress...
Provided by University of Wisconsin System
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