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University of California
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Cyber Physical Systems: Design Challenges
May 6, 2008, 12:00am PDT
This paper examines the challenges in designing such systems, and in particular raises the question of whether today's computing and networking technologies provide an adequate foundation for CPS....
Provided by University of California
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Energy Efficient Data Collection in Distributed Sensor Environments
January 1, 2011, 12:00am PST
Sensors are typically deployed to gather data about the physical world and its artifacts for a variety of purposes that range from environment monitoring, control, to data analysis. Since sensors...
Provided by University of California
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White Papers
Conditioned-Safe Ceremonies and a User Study of an Application to Web Authentication
December 16, 2008, 12:00am PST
The authors introduce the notion of a conditioned-safe ceremony. A "Ceremony" is similar to the conventional notion of a protocol, except that a ceremony explicitly includes human participants....
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White Papers
Navigating The Trilemma: Capital Flows And Monetary Policy In China
December 1, 2008, 12:00am PST
In recent years China has faced an increasing trilemma - how to pursue an independent domestic monetary policy and limit exchange rate flexibility, while at the same time facing large and growing...
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White Papers
Scaling Laws for Cooperative Node Localization in Non-Line-of-Sight Wireless Networks
March 20, 2011, 12:00am PDT
The authors study the problem of cooperative node localization in Non-Line-Of-Sight (NLOS) wireless networks and address design questions such as, "How many anchors and what fraction of...
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White Papers
A Game Theoretical Approach to Communication Security
March 14, 2011, 12:00am PDT
The increased reliance on the Internet has made information and communication systems more vulnerable to security attacks. Many recent incidents demonstrate this vulnerability, such as the rapid...
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White Papers
Addressing Modeling Challenges in Cyber-Physical Systems
March 4, 2011, 12:00am PST
This paper focuses on the challenges of modeling cyber-physical systems that arise from the intrinsic heterogeneity, concurrency, and sensitivity to timing of such systems. It uses a portion of an...
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White Papers
Synthesizing Switching Logic to Minimize Long-Run Cost
March 4, 2011, 12:00am PST
Given a multi-modal dynamical system, optimal switching logic synthesis involves generating the conditions for switching between the system modes such that the resulting hybrid system satisfies a...
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White Papers
An Empirical Analysis of XSS Sanitization in Web Application Frameworks
February 9, 2011, 12:00am PST
Filtering or sanitization is the predominant mechanism in today's applications to defend against cross-site scripting (XSS) attacks. XSS sanitization can be difficult to get right as it ties in...
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White Papers
Towards a Societal Scale, Mobile Sensing System
February 1, 2011, 12:00am PST
With the proliferation of sensor equipped smart phones, and augmented reality applications fast appearing, the mobile phone is becoming something much more than a scaled-down, connected IO and...
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White Papers
Axioms for Asynchronous Processes
January 20, 2010, 12:00am PST
From classical computability theory to modern programming language design, the mathematical concept of function has dominated the perception of sequential computation. But as soon as the authors...
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White Papers
PreFail: Programmable and Efficient Failure Testing Framework
January 18, 2010, 12:00am PST
As hardware failures are no longer rare in the era of cloud computing, reliability has become a first-class design goal of today's cloud software systems. To ensure that software's fault-tolerance...
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White Papers
An Empirical Study of the Control and Data Planes (or Control Plane Determinism Is Key for Replay Debugging Data center Applications)
May 21, 2010, 12:00am PDT
Replay debugging systems enable the reproduction and debugging of non-deterministic failures in production application runs. However, no existing replay system is suitable for datacenter...
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Towards Practical Taint Tracking
June 5, 2010, 12:00am PDT
This paper proposes several technical measures that significantly improve performance and largely limit kernel taint explosion in a XEN- and QEMU-based taint tracking system. Full-system,...
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An Adaptive Multi-Channel P2P Video-on-Demand System Using Plug-and-Play Helpers
July 28, 2010, 12:00am PDT
They authors present a multi-channel P2P Video-on-Demand (VoD) system using "plug-and-play" helpers. Helpers are heterogeneous "micro-servers" with limited storage, bandwidth and number of users...
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White Papers
System Problem Detection by Mining Console Logs
August 1, 2010, 12:00am PDT
The console logs generated by an application contain information that the developers believed would be useful in debugging or monitoring the application. Despite the ubiquity and large size of...
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Automating Data Center Operations Using Machine Learning
August 16, 2010, 12:00am PDT
Today's Internet data-centers run many complex and large-scale Web applications that are very difficult to manage. The main challenges are understanding user workloads and application performance,...
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White Papers
Results and Techniques in Multiuser Information Theory
August 16, 2010, 12:00am PDT
In this dissertation the authors develop new techniques and apply them to prove new results in multiuser information theory. In the first part of the dissertation, they introduce the "Potential...
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A Model-Based Process for Evaluating Cluster Building Blocks
August 18, 2010, 12:00am PDT
Traditional servers account for more than 1.5% of the US electricity use though spend their lives largely underutilized or idle. Because a large portion of power in a data center is due directly...
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White Papers
Two-Handed Marking Menus for Multi-Touch Devices
August 19, 2010, 12:00am PDT
The authors investigate multi-stroke marking menus for multi-touch devices and they show that using two hands can improve performance. They present two new two-handed multi-stroke marking menu...
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White Papers
Toward an Error Handling Mechanism for Timing Errors With Java Pathfinder and Ptolemy II
September 7, 2010, 12:00am PDT
Designing effective error handling systems in an embedded software system is essential for acceptable and reliable functionality in cases of errors and for the recovery from faults. Errors in the...
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White Papers
Copperhead: Compiling an Embedded Data Parallel Language
September 16, 2010, 12:00am PDT
Modern parallel microprocessors deliver high performance on applications that expose substantial fine-grained data parallelism. Although data parallelism is widely available in many computations,...
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White Papers
FATE and DESTINI: A Framework for Cloud Recovery Testing
September 27, 2010, 12:00am PDT
As the cloud era begins and failures become commonplace, the fate and destiny of availability, reliability and performance are in the hands of failure recovery. Unfortunately, recovery problems...
Provided by University of California
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White Papers
A System for Managing Physical Data in Buildings
September 28, 2010, 12:00am PDT
In order to reduce building energy consumption, the authors need a global, accurate view of the building. Many modern buildings have a sensing infrastructure that can be used to do fine-grained...
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White Papers
The Earlier the Better: A Theory of Timed Actor Interfaces
October 7, 2010, 12:00am PDT
Programming embedded and cyber-physical systems requires attention not only to functional behavior and correctness, but also to non-functional aspects and specifically timing and performance...
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White Papers
Communication-Avoiding QR Decomposition for GPU's
October 8, 2010, 12:00am PDT
The authors describe an implementation of the Communication-Avoiding QR (CAQR) factorization that runs entirely on a single graphics processor (GPU). They show that the reduction in memory traffic...
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White Papers
Diesel: Applying Privilege Separation to Database Access
December 8, 2010, 12:00am PST
Database-backed applications typically grant complete database access to every part of the application. In this scenario, a flaw in one module can expose data that the module never uses for...
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White Papers
Robust Communication in Vehicular Ad Hoc Networks
December 16, 2010, 12:00am PST
The development of intelligent transportation systems is one of the most important strategies for making roads safer and more efficient. The key technology underpinning all such systems, from...
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White Papers
Solution Processed Silver Sulfide Thin Films for Filament Memory Applications
December 17, 2010, 12:00am PST
Filament Memories based on resistive switching have been attracting attention in recent years as a potential replacement for flash memory in CMOS technology and as a potential candidate memory for...
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White Papers
Optimizing Irregular Data Accesses for Cluster and Multi-Core Architectures
December 17, 2010, 12:00am PST
Applications with irregular accesses to shared state are one of the most challenging computational patterns in parallel computing. Accesses can involve both read or write operations, with writes...
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White Papers
On the Role of Learning Theories in Furthering Software Engineering Education
April 22, 2008, 12:00am PDT
Learning theories describe how people learn. There is a large body of work concerning learning theories on which to draw, a valuable resource of which the domain of software engineering...
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White Papers
DesignMinders: A Design Knowledge Collaboration Approach
October 29, 2009, 12:00am PDT
Software developers face numerous challenges in capturing and reusing knowledge during informal design sessions. While the knowledge that is brought to bear and generated during these sessions...
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White Papers
Modeling PLA Variation of Privacy-Enhancing Personalized Systems
May 19, 2009, 12:00am PDT
Privacy-Enhancing Personalized (PEP) systems address individual users' privacy preferences as well as privacy laws and regulations. Building such systems entails modeling two different domains:...
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White Papers
Towards Supporting Awareness of Indirect Conflicts Across Software Configuration Management Workspaces
August 20, 2007, 12:00am PDT
Workspace awareness techniques have been proposed to enhance the effectiveness of software configuration management systems in coordinating parallel work. These techniques share information...
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White Papers
A Comprehensive Evaluation of Workspace Awareness in Software Configuration Management Systems
June 26, 2007, 12:00am PDT
Workspace awareness has emerged as a new coordination paradigm in configuration management, enabling early detection of potential conflicts by providing developers with information of relevant,...
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White Papers
Designing Software Cockpits for Coordinating Distributed Software Development
July 2, 2007, 12:00am PDT
Coordination of global software development is particularly difficult as it involves teams that are distributed across different locations and time zones. One of the key issues is a lack of...
Provided by University of California
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White Papers
An Observation of Fine-Grain Usage Patterns for Two Configuration Management Tools
January 1, 2011, 12:00am PST
This paper presents the results of a survey of employees from one company that uses different configuration management tools and processes for the development of two separate products. Results...
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White Papers
Reducing Features to Improve Bug Prediction
September 3, 2009, 12:00am PDT
Recently, machine learning classifiers have emerged as a way to predict the existence of a bug in a change made to a source code file. The classifier is first trained on software history data, and...
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White Papers
Calico: A Tool for Early Software Design Sketching
June 25, 2008, 12:00am PDT
In numerous design disciplines, the role and importance of sketching are well understood and appreciated. Mechanical engineers, architects, and graphic designers, to name a few, all are known to...
Provided by University of California
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White Papers
DesignMinders: Preserving and Sharing Informal Software Design Knowledge
July 31, 2009, 12:00am PDT
Software design is a knowledge-intensive activity. Knowledge is both generated and used when making crucial design decisions, and it is important to capture and share the knowledge in order to...
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White Papers
Compressing Provenance Graphs
May 23, 2011, 12:00am PDT
The provenance community has built a number of systems to collect provenance, most of which assume that provenance will be retained indefinitely. However, it is not cost-effective to retain...
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White Papers
Are BGP Routers Open to Attack? An Experiment
April 28, 2010, 12:00am PDT
The BGP protocol is at the core of the routing infrastructure of the Internet. Across years, BGP has proved to be very stable for its purpose. However, there have been some catastrophic incidents...
Provided by University of California
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White Papers
Why Johnny Can't Pentest: An Analysis of Black-Box Web Vulnerability Scanners
August 21, 2010, 12:00am PDT
Black-box web vulnerability scanners are a class of tools that can be used to identify security issues in web applications. These tools are often marketed as "Point-and-click pentesting" tools...
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White Papers
Toward Automated Detection of Logic Vulnerabilities InWeb Applications
September 6, 2010, 12:00am PDT
Web applications are the most common way to make services and data available on the Internet. Unfortunately, with the increase in the number and complexity of these applications, there has also...
Provided by University of California
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White Papers
The Underground Economy of Fake Antivirus Software
May 20, 2011, 12:00am PDT
Fake Anti-Virus (AV) programs have been utilized to defraud millions of computer users into paying as much as one hundred dollars for a phony software license. As a result, fake AV software has...
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White Papers
Dymo: Tracking Dynamic Code Identity
September 13, 2011, 12:00am PDT
Code identity is a primitive that allows an entity to recognize a known, trusted application as it executes. This primitive supports trusted computing mechanisms such as sealed storage and remote...
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White Papers
Malware Analysis With Tree Automata Inference
April 20, 2011, 12:00am PDT
The underground malware-based economy is flourishing and it is evident that the classical ad-hoc signature detection methods are becoming insufficient. Malware authors seem to share some source...
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White Papers
Differential Slicing: Identifying Causal Execution Differences for Security Applications
March 8, 2011, 12:00am PST
A security analyst often needs to understand two runs of the same program that exhibit a difference in program state or output. This is important, for example, for vulnerability analysis, as well...
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MACE: Model-Inference-Assisted Concolic Exploration for Protocol and Vulnerability Discovery
August 3, 2011, 12:00am PDT
Program state-space exploration is central to software security, testing, and verification. In this paper, the authors propose a novel technique for state-space exploration of software that...
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White Papers
Technology Choices and Pricing Policies in Wireless Networks
March 4, 2011, 12:00am PST
This paper studies the provision of a wireless network by a monopolistic provider who may be either benevolent (seeking to maximize social welfare) or selfish (seeking to maximize provider...
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White Papers
Spectrum Opportunity Detection: How Good Is Listen-Before-Talk?
January 1, 2011, 12:00am PST
The authors consider spectrum opportunity detection in cognitive radio networks for spectrum overlay. They highlight the differences between detecting primary signals and detecting spectrum...
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White Papers
Asymptotically Efficient Multi-Channel Estimation for Opportunistic Spectrum Access
January 1, 2011, 12:00am PST
The problem of estimating the parameters of multiple independent continuous-time Markov on-off processes is considered. The objective is to minimize the total Mean Square Error (MSE) under a...
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White Papers
Multi-Armed Bandit Problems With Heavy Tail Reward Distributions
July 6, 2011, 12:00am PDT
In the Multi-Armed Bandit (MAB) problem, there are a given set of arms with unknown reward models. At each time, a player selects one arm to play, aiming to maximize the total expected reward over...
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Multi-Channel Opportunistic Spectrum Access in Unslotted Primary Systems With Unknown Models
October 14, 2011, 12:00am PDT
Multi-channel opportunistic spectrum access in unslotted primary systems is considered. The primary occupancy of each channel is modeled as a general on-off renewal process. The distributions of...
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White Papers
Maximum Damage Battery Depletion Attack in Mobile Sensor Networks
May 13, 2011, 12:00am PDT
Developing reliable security measures against outbreaks of malware will facilitate the proliferation of wireless sensing technologies. The first step toward this goal is to investigate potential...
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White Papers
Routing and Multicast in Multihop, Mobile Wireless Networks
January 1, 2011, 12:00am PST
In this paper, the authors present a multicast protocol which builds upon a cluster based wireless network infrastructure. First, they introduce the network infrastructure which includes several...
Provided by University of California
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White Papers
The Design of a Reliable Reputation System
August 31, 2010, 12:00am PDT
Next generation Web 2.0 communities and distributed P2P systems rely on the cooperation of diverse user populations spread across numerous administrative and security domains. Zero accountability...
Provided by University of California
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White Papers
PoX: Protecting Users From Malicious Facebook Applications
January 28, 2011, 12:00am PST
Online social networks such as Facebook, MySpace, and Orkut store large amounts of sensitive user data. While a user can legitimately assume that a social network provider adheres to strict...
Provided by University of California
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White Papers
Distributed and Cooperative Link Scheduling for Large-Scale Multihop Wireless Networks
October 24, 2007, 12:00am PDT
A Distributed And Cooperative Link-Scheduling (DCLS) algorithm is introduced for large-scale multi-hop wireless networks. With this algorithm, each and every active link in the network...
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White Papers
Performance Bounds of Distributed CSMA Scheduling
February 3, 2010, 12:00am PST
CSMA-based scheduling is a recently proposed distributed scheduling algorithm that is shown to achieve the maximal throughput. Central to this algorithm is a Markov chain that produces samples...
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Optimal Tradeoff Between Exposed and Hidden Nodes in Large Wireless Networks
November 9, 2009, 12:00am PST
Wireless networks equipped with the CSMA protocol are subject to collisions due to interference. For a given interference range the authors investigate the trade-off between collisions (hidden...
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White Papers
Approximate Characterization of Capacity in Gaussian Relay Networks
June 5, 2008, 12:00am PDT
The authors present an achievable rate for general Gaussian relay networks. They show that the achievable rate is within a constant number of bits from the information-theoretic cut-set upper...
Provided by University of California
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White Papers
Base Station Association Game in Multi-Cell Wireless Networks
February 28, 2008, 12:00am PST
The authors consider a multi-cell wireless network with a large number of users. Each user selfishly chooses the Base Station (BS) that gives it the best throughput (utility), and each BS...
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White Papers
Stable and Utility-Maximizing Scheduling for Stochastic Processing Networks
November 6, 2009, 12:00am PST
Stochastic Processing Networks (SPNs) are models of service, processing, communication, or manufacturing systems. In such a network, service activities require parts and resources to produce new...
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White Papers
Convergence and Stability of a Distributed CSMA Algorithm for Maximal Network Throughput
August 26, 2009, 12:00am PDT
Designing efficient scheduling algorithms is an important problem in a general class of networks with resource-sharing constraints, such as wireless networks and stochastic processing networks....
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White Papers
Utility-Maximizing Scheduling for Stochastic Processing Networks
August 24, 2009, 12:00am PDT
Stochastic Processing Networks (SPNs) model manufacturing, communication, or service systems. In such a network, service activities require parts and resources to produce other parts. Because...
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White Papers
Reliable Relaying With Uncertain Knowledge
April 16, 2009, 12:00am PDT
The motivation for this paper is to analyze the effect of information uncertainty on the design and performance of protocols. The paper considers two types of situations. The first is when...
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White Papers
Linear Capacity Scaling in Wireless Networks: Beyond Physical Limits?
February 16, 2010, 12:00am PST
Multi-hop is the communication architecture of current wireless networks such as mesh or ad hoc networks. Packets are sent from each source to its destination via multiple relay nodes. Each relay...
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Beyond Multi-Hop: Optimal Cooperation in Large Wireless Networks
May 6, 2010, 12:00am PDT
Multi-hop is the communication architecture of current wireless networks such as mesh or ad hoc networks. Packets are sent from each source to its destination via multiple point-to-point...
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White Papers
A Self-Healing and Optimizing Routing Technique for Ad Hoc Networks
January 1, 2011, 12:00am PST
On demand routing protocols provide scalable and cost-effective solutions for packet routing in wireless ad hoc networks. The paths generated by these protocols may deviate far from the optimal...
Provided by University of California
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White Papers
Multi-User Multimedia Resource Allocation Over Multi-Carrier Wireless Networks
October 17, 2007, 12:00am PDT
The authors address the problem of multi-user video transmission over the uplink of multi-carrier networks from an information theoretic perspective. Under the constraints imposed by the...
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White Papers
Coverage-Based Information Retrieval for Lifetime Maximization in Sensor Networks
January 1, 2011, 12:00am PST
The authors consider information retrieval in a wireless sensor network deployed to monitor a spatially correlated random field. They address sensor scheduling in each data collection under the...
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White Papers
Joint Design of Scheduling and Routing Based on Connected Coverage for Optimal Sensor Network Lifetime
January 1, 2011, 12:00am PST
The authors consider information retrieval in a wireless sensor network deployed to monitor a spatially corrected random led. The measured data are sent to an access point through multi-hop...
Provided by University of California
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White Papers
Bursty Traffic in Energy-Constrained Opportunistic Spectrum Access
August 6, 2007, 12:00am PDT
The authors design opportunistic spectrum access strategies for improving spectrum efficiency. In each slot, a secondary user chooses a subset of channels to sense and decides whether to access...
Provided by University of California
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White Papers
Distributed Learning in Cognitive Radio Networks: Multi-Armed Bandit With Distributed Multiple Players
January 8, 2010, 12:00am PST
The authors consider a cognitive radio network with distributed multiple secondary users, where each user independently searches for spectrum opportunities in multiple channels without exchanging...
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White Papers
Distributed Channel Access Scheduling for Ad Hoc Networks
January 1, 2011, 12:00am PST
In this paper, the authors present and analyze protocols for Time-Division Multiple Access (TDMA) scheduling in ad hoc networks with omni-directional antennas. These protocols use a Neighbor-aware...
Provided by University of California
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White Papers
Opportunistic Routing With Congestion Diversity in Wireless Multi-Hop Networks
August 18, 2009, 12:00am PDT
This paper considers the problem of routing packets across a multi-hop network consisting of multiple sources of traffic and wireless links with stochastic reliability while ensuring bounded...
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White Papers
A Class of Throughput Optimal Routing Policies
October 2, 2009, 12:00am PDT
This paper considers the problem of routing packets across a multi-hop wireless network while ensuring throughput optimality. One of the main challenges in the design of throughput optimal routing...
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White Papers
Variable-Length Coding With Noiseless Feedback and Finite Messages
December 18, 2010, 12:00am PST
This paper considers the problem of zero-rate (fixed number of messages) variable-length coding over a memoryless noisy channel with noiseless feedback. This problem is considered from a control...
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White Papers
Opportunistic Routing With Congestion Diversity and Tunable Overhead
February 20, 2010, 12:00am PST
This paper considers the problem of routing packets across a multi-hop network consisting of multiple sources of traffic and wireless links with stochastic reliability and a broadcast nature....
Provided by University of California
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