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University of California
(1026 results)-
White Papers
AODV Routing Protocol Implementation Design
January 1, 2012, 12:00am PST
Simulation is an important tool in the development of mobile ad hoc networks; it provides an excellent environment to experiment and verify routing protocol correctness. However, simulation does...
Provided by University of California
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White Papers
Transparent Influence of Path Selection in Heterogeneous Ad Hoc Networks
January 1, 2012, 12:00am PST
In wireless ad hoc networks, heterogeneity is inherent; each node has different characteristics, resources and policies. Most current ad hoc routing protocols do not consider node heterogeneity...
Provided by University of California
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White Papers
AODV Implementation Design and Performance Evaluation
January 1, 2012, 12:00am PST
To date, the majority of ad hoc routing protocol research has been done using simulation only. One of the most motivating reasons to use simulation is the difficulty of creating a real...
Provided by University of California
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White Papers
Diffusion Filters as a Flexible Architecture for Event Notification in Wireless Sensor Networks
January 1, 2012, 12:00am PST
Wireless sensor networks represent an increasingly important example of distributed event systems. Unlike Internet-based distributed event systems, sensor networks are very bandwidth constrained...
Provided by University of California
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White Papers
Permission Re-Delegation: Attacks and Defenses
June 7, 2011, 12:00am PDT
Modern browsers and smartphone operating systems treat applications as mutually untrusting, potentially malicious principals. Applications are isolated except for explicit IPC or inter-application...
Provided by University of California
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White Papers
Defining CPS Challenges in a Sustainable Electricity Grid
March 16, 2012, 12:00am PDT
Cyber-Physical Systems (CPS) is characterized as complex distributed systems exhibiting substantial uncertainty due to interactions with the physical world. Today's electric grids are often...
Provided by University of California
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White Papers
Towards Cooperative Grids: Sensor/Actuator Networks for Renewables Integration
August 1, 2010, 12:00am PDT
Faced with an uncertain path forward to Renewables Portfolio Standard (RPS) goals and the high cost of energy storage, the authors believe that deep demand side management must be a central...
Provided by University of California
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White Papers
Design, Modeling, and Capacity Planning for Micro-Solar Power Sensor Networks
February 22, 2008, 12:00am PST
This paper describes a systematic approach to building micro-solar power subsystems for wireless sensor network nodes. The authors' approach composes models of the basic pieces - solar panels,...
Provided by University of California
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White Papers
Rubik's for Cryptographers
January 19, 2011, 12:00am PST
Hard mathematical problems are at the core of security arguments in cryptography. In this paper, the authors study mathematical generalizations of the famous Rubik's cube puzzle, namely the...
Provided by University of California
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White Papers
Efficient and Optimally Secure Key-Length Extension for Block Ciphers Via Randomized Cascading
March 23, 2012, 12:00am PDT
The authors consider the question of efficiently extending the key length of block ciphers. To date, the approach providing highest security is triple encryption (used e.g., in Triple-DES), which...
Provided by University of California
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White Papers
On the Performance of Certain Private Set Intersection Protocols
April 7, 2012, 12:00am PDT
Private Set Intersection (PSI) is a useful cryptographic primitive that allows two parties (client and server) to interact based on their respective (private) input sets, in such a way that client...
Provided by University of California
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White Papers
Polynomial-Time, Semantically-Secure Encryption Achieving the Secrecy Capacity
September 1, 2011, 12:00am PDT
In the wiretap channel setting, one aims to get information-theoretic privacy of communicated data based only on the assumption that the channel from sender to adversary is noisier than the one...
Provided by University of California
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White Papers
A Cryptographic Treatment of the Wiretap Channel
April 1, 2010, 12:00am PDT
The wiretap channel is a setting where one aims to provide information-theoretic privacy of communicated data based solely on the assumption that the channel from sender to adversary is "Noisier"...
Provided by University of California
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White Papers
Broadcast-Efficient Secure Multiparty Computation
March 11, 2012, 12:00am PST
Secure MultiParty Computation (MPC) is perhaps the most popular paradigm in the area of cryptographic protocols. It allows several mutually untrustworthy parties to jointly compute a function of...
Provided by University of California
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White Papers
Distributed Authentication for Randomly Compromised Networks
August 27, 2009, 12:00am PDT
The authors introduce a simple, practical approach with probabilistic information-theoretic security to solve one of quantum key distribution's major security weaknesses: the requirement of an...
Provided by University of California
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White Papers
Online Learning in Autonomic Multi-Hop Wireless Networks for Transmitting Mission-Critical Applications
March 31, 2009, 12:00am PDT
In this paper, the authors study how to optimize the transmission decisions of nodes aimed at supporting mission-critical applications, such as surveillance, security monitoring, and military...
Provided by University of California
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White Papers
Static Detection of Loop-Invariant Data Structures
March 29, 2012, 12:00am PDT
As a culture, object-orientation encourages programmers to create objects, both short- and long-lived, without concern for cost. Excessive object creation and initialization can cause severe...
Provided by University of California
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White Papers
Uncovering Performance Problems in Java Applications With Reference Propagation Profiling
February 29, 2012, 12:00am PST
Many applications suffer from run-time bloat: excessive memory usage and work to accomplish simple tasks. Bloat significantly affects scalability and performance, and exposing it requires good...
Provided by University of California
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White Papers
From Tests to Proofs
April 2, 2009, 12:00am PDT
The authors describe the design and implementation of an automatic invariant generator for imperative programs. While automatic invariant generation through constraint solving has been extensively...
Provided by University of California
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White Papers
Application Architecture Discovery - Towards Domain-Driven, Easily-Extensible Code Structure
August 31, 2011, 12:00am PDT
The architecture of a software system and its code structure have a strong impact on its maintainability - the ability to fix problems, and make changes to the system efficiently. To ensure...
Provided by University of California
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White Papers
OnController Initialization in Multivariable Switching Systems
March 15, 2012, 12:00am PDT
The authors consider a class of switched systems which consists of a linear MIMO and possibly unstable process in feedback interconnection with a multi-controller whose dynamics switch. It is...
Provided by University of California
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White Papers
Jump Control of Probability Densities With Applications to Autonomous Vehicle Motion
September 3, 2009, 12:00am PDT
The authors investigate the problem of controlling the probability density of the state of a process that is observed by the controller via a fixed but unknown function of the state. The goal is...
Provided by University of California
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White Papers
L2-Induced Gains of Switched Systems and Classes of Switching Signals
September 11, 2010, 12:00am PDT
This paper addresses the L2-induced gain analysis for switched linear systems. The authors exploit non-conservative necessary and sufficient conditions for the induced gain to lie below a...
Provided by University of California
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White Papers
Impulsive Systems Triggered by Superposed Renewal Processes
September 13, 2010, 12:00am PDT
The authors consider impulsive systems with several reset maps triggered by independent renewal processes, i.e., the intervals between jumps associated with a given reset map are identically...
Provided by University of California
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White Papers
Quadratic Optimization for Controller Initialization in MIMO Switching Systems
March 3, 2010, 12:00am PST
This paper deals with switching between several linear time-invariant controllers to be used in feedback with a MIMO linear time-invariant (not necessarily stable) plant to be controlled. The...
Provided by University of California
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White Papers
Stability of Impulsive Systems Driven by Renewal Processes
March 16, 2009, 12:00am PDT
Necessary and sufficient conditions are provided for stochastic stability and mean exponential stability of impulsive systems with jumps triggered by a renewal process, that is, the intervals...
Provided by University of California
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White Papers
Root-Mean-Square Gains of Switched Linear Systems: A Variational Approach
September 5, 2007, 12:00am PDT
The authors consider the problem of computing the Root-Mean-Square (RMS) gain of switched linear systems. They develop a new approach which is based on an attempt to characterize the "Worst-Case"...
Provided by University of California
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White Papers
Optimal Controller Initialization for Switching Between Stabilizing Controllers
September 17, 2007, 12:00am PDT
An important class of switched systems consists of those systems built as the feedback interconnection of a plant to be controlled, together with a multi-controller whose dynamics switch. When...
Provided by University of California
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White Papers
Modeling and Analysis of Stochastic Hybrid Systems
March 4, 2011, 12:00am PST
The author describes a model for Stochastic Hybrid Systems (SHSs) where transitions between discrete modes are triggered by stochastic events. The rate at which these transitions occur is allowed...
Provided by University of California
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White Papers
Power Supply Synchronization Without Communication
November 28, 2011, 12:00am PST
The authors consider the synchronization of power supplies in an isolated grid with multiple small-to-medium power sources. They show how to achieve a coordinated or synchronized behavior by...
Provided by University of California
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White Papers
Indexability and Whittle Index for Restless Bandit Problems Involving Reset Processes
September 2, 2011, 12:00am PDT
In this paper, the authors studied a class of RMAB problems that model the monitoring and control of multiple reset processes. They showed that the RMAB satisfies Whittle indexability. When the...
Provided by University of California
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White Papers
Dynamic Pricing Under Binary Demand Uncertainty: A Multi-Armed Bandit With Correlated Arms
November 25, 2011, 12:00am PST
The authors consider a dynamic pricing problem with unknown demand models. In this problem, a seller offers prices sequentially to a stream of potential customers and observes either success or...
Provided by University of California
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White Papers
Trust, Opinion Diffusion and Radicalization in Social Networks
November 23, 2011, 12:00am PST
Gossiping models have increasingly been applied to study social network phenomena. In this context, this paper is specifically concerned with modeling how opinions of social agents can be...
Provided by University of California
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White Papers
Logarithmic Weak Regret of Non-Bayesian Restless Multi-Armed Bandit
February 20, 2011, 12:00am PST
The Restless Multi-Armed Bandit (RMAB) problem is a generalization of the classic Multi-Armed Bandit (MAB) problem. In the classic MAB, there are N independent arms and a single player. At each...
Provided by University of California
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White Papers
Learning and Sharing in a Changing World: Non-Bayesian Restless Bandit With Multiple Players
January 1, 2012, 12:00am PST
The authors consider decentralized restless multi-armed bandit problems with unknown dynamics and multiple players. The reward state of each arm transits according to an unknown Markovian rule...
Provided by University of California
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White Papers
Decentralized Multi-Armed Bandit With Multiple Distributed Players
January 31, 2010, 12:00am PST
The authors formulate and study a decentralized Multi-Armed Bandit (MAB) problem, where M distributed players compete for N independent arms with unknown reward statistics. At each time, each...
Provided by University of California
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White Papers
Decentralized Multi-Armed Bandit With Imperfect Observations
September 27, 2010, 12:00am PDT
The authors consider decentralized multi-armed bandit problems with multiple distributed players. At each time, each player chooses one of the N independent arms with unknown reward statistics to...
Provided by University of California
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White Papers
Achieving Congestion Diversity in Multi-Hop Wireless Mesh Networks
March 21, 2012, 12:00am PDT
This paper reports on the first systematic study of congestion-aware routing algorithms for wireless mesh networks to achieve an improved end-end delay performance. In particular, the authors...
Provided by University of California
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White Papers
Elements of Cellular Blind Interference Alignment - Aligned Frequency Reuse, Wireless Index Coding and Interference Diversity
March 11, 2012, 12:00am PST
The authors explore Degrees of Freedom (DoF) characterizations of partially connected wireless networks, especially cellular networks, with no channel state information at the transmitters....
Provided by University of California
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White Papers
Opportunistic Routing With Congestion Diversity in Wireless Ad-Hoc Networks
March 6, 2012, 12:00am PST
The authors consider the problem of routing packets across a multi-hop network consisting of multiple sources of traffic and wireless links while ensuring bounded expected delay. Each packet...
Provided by University of California
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White Papers
Exploiting Semantics for Sensor Re-Calibration in Event Detection Systems[Long]
July 19, 2007, 12:00am PDT
Event detection from a video stream is becoming an important and challenging task in surveillance and sentient systems. While computer vision has been extensively studied to solve different kinds...
Provided by University of California
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White Papers
RADcast: Enabling Reliability Guarantees for Content Dissemination in Ad Hoc Networks
January 20, 2009, 12:00am PST
This paper deals with the problem of reliable and fast broadcast of mission-critical data with rich content over ad hoc networks. Existing approaches to dissemination reliability often assume...
Provided by University of California
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White Papers
An Experimental Study on Wi-Fi Ad-Hoc Mode for Mobile Device-to-Device Video Delivery
March 14, 2009, 12:00am PDT
The demand for video content is continuously increasing as video sharing on the Internet is becoming enormously popular recently. This demand, with its high bandwidth requirements, has a...
Provided by University of California
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White Papers
Insights Into the Stable Recovery of Sparse Solutions in Overcomplete Representations Using Network Information Theory
January 18, 2008, 12:00am PST
In this paper, the authors examine the problem of overcomplete representations and provide new insights into the problem of stable recovery of sparse solutions in noisy environments. They...
Provided by University of California
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White Papers
A Systematic Approach to Improve Communication for Emergency Response
September 15, 2008, 12:00am PDT
The importance of communication, information sharing and interoperability in an emergency response scenario has risen recently based on the frequency of disasters throughout the world and the wide...
Provided by University of California
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White Papers
Information Collection Services for QoS-aware Mobile Applications
January 1, 2010, 12:00am PST
Efficient resource provisioning that allows for cost-effective enforcement of application QoS relies on accurate system state information. However, maintaining accurate information about available...
Provided by University of California
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White Papers
Poster Abstract: Packet Delivery Performance for On-Body Mica2dot Wireless Sensor Networks
January 1, 2010, 12:00am PST
Wearable computing continues to attract researchers' interests. In particular, the combination of biomedical applications and sensor networks has been in major focus, especially in the field of...
Provided by University of California
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White Papers
Overlay Multicast in Mobile Ad-Hoc Networks Using Araneola
January 1, 2010, 12:00am PST
Araneola, a system for scalable reliable multicast in dynamic wired network environments, exploits the good properties of random regular graphs (high connectivity and diameter that grows...
Provided by University of California
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White Papers
NeT & CoT: Inferring XML Schemas From Relational World
January 1, 2010, 12:00am PST
With XML emerging as the data format of the Internet era, there is a substantial increase in the amount of data encoded in XML. However, the majority of everyday data is still stored and...
Provided by University of California
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White Papers
XBiT: An XML-Based Bitemporal Data Model
January 1, 2010, 12:00am PST
Past research work on modeling and managing temporal in-formation has, so far, failed to elicit support in commercial database systems. The increasing popularity of XML offers a unique opportunity...
Provided by University of California
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White Papers
Lightweight Jammer Localization in Wireless Networks: System Design and Implementation
August 5, 2009, 12:00am PDT
Jamming attacks have become prevalent during the last few years, due to the shared nature and the open access to the wireless medium. Finding the location of a jamming device is of great...
Provided by University of California
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White Papers
Coexistence-Aware Scheduling for Wireless System-on-a-Chip Devices
June 19, 2010, 12:00am PDT
Today's mobile devices support many wireless technologies to achieve ubiquitous connectivity. Economic and energy constraints, however, drive the industry to implement multiple technologies into a...
Provided by University of California
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White Papers
Bluetooth, ZigBee, and Wibree: A Comparison of WPAN Technologies
November 20, 2008, 12:00am PST
Wireless Personal Area Network (WPAN) designs have been flourishing in recent years. The pervasive success of Bluetooth has been a boon to all devices in the IEEE 802.15 working group. As...
Provided by University of California
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White Papers
Network Coding Based Cooperative Peer-to-Peer Repair in Wireless Ad-Hoc Networks
February 27, 2008, 12:00am PST
Cooperative Peer-to-Peer Repair (CPR) has been proposed to recover from packet losses incurred during 3G broadcast. CPR leverages the increasing presence of multi-homed mobile devices having both...
Provided by University of California
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White Papers
Internet QoS Routing With IP Telephony and TCP Traffic
January 1, 2010, 12:00am PST
In this paper, authors propose the use of QoS routing to enhance the support of IP Telephony. The proposed scheme is based on QoS intradomain OSPF routing, an extension of the conventional OSPF...
Provided by University of California
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White Papers
QUORUM - Quality of Service in Wireless Mesh Networks
December 1, 2007, 12:00am PST
Wireless Mesh Networks (WMNs) can provide seamless broadband connectivity to network users with low setup and maintenance costs. To support next-generation applications with real-time...
Provided by University of California
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White Papers
A Multicast Routing Protocol for Ad-Hoc Networks
November 4, 2007, 12:00am PDT
The Core-Assisted Mesh Protocol (CAMP) is introduced for multicast routing in ad-hoc networks. CAMP generalizes the notion of core-based trees introduced for internet multicasting into multicast...
Provided by University of California
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White Papers
End-Host Controlled Multicast Routing
January 1, 2010, 12:00am PST
The last decade has seen a deluge of proposals for supporting multicast in the Internet. These proposals can be categorized as either infrastructure-based, with the multicast functionality...
Provided by University of California
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White Papers
Routing to Manage Resolution and Waiting Time in Call Centers With Heterogeneous Servers
August 14, 2009, 12:00am PDT
In many call centers, agents are trained to handle all arriving calls but exhibit very different performance for the same call type, where performance is defined by the Average call Handling Time...
Provided by University of California
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White Papers
An Adaptive Opportunistic Routing Scheme for Wireless Ad-Hoc Networks
August 10, 2009, 12:00am PDT
In this paper, a distributed adaptive opportunistic routing scheme for multi-hop wireless ad-hoc networks is proposed. The proposed scheme utilizes a reinforcement learning framework to...
Provided by University of California
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White Papers
Energy-Aware Routing in Wireless Sensor Networks With Adaptive Energy-Slope Control
May 21, 2009, 12:00am PDT
Wireless Sensor Networks (WSNs) have proven and increased their popularity in many different applications where sensitive information is collected at sensor nodes and forwarded to a Central...
Provided by University of California
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White Papers
Joint Multicast Routing and Network Design Optimization for Networks-on-Chip
August 14, 2009, 12:00am PDT
This paper considers the problem of synthesizing custom Networks-on-Chip (NoC) architectures that are optimized for a given application. Both unicast and multicast traffic flows are considered in...
Provided by University of California
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White Papers
Energy-Efficient Adaptive Routing for Ad Hoc Networks With Time-Varying Heterogeneous Traffic
January 1, 2010, 12:00am PST
Authors propose a hybrid networking strategy for large-scale energy constrained ad hoc networks. Referred to as Energy-Aware GEolocation aided Routing (EAGER), this protocol optimally blends...
Provided by University of California
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White Papers
Automatic Scene Relighting for Video Conferencing
August 15, 2009, 12:00am PDT
This paper describes a new method to automatically improve scene lighting for video conferencing by learning the photometric mapping between a lower exposure and desired exposure created using...
Provided by University of California
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White Papers
The Remote Processing Framework for Portable Computer Power Saving
November 9, 2007, 12:00am PST
Recent research has demonstrated that portable computer users can save battery power by migrating tasks over wireless networks to server machines. Making this technique generally useful requires...
Provided by University of California
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White Papers
Saving Portable Computer Battery Power Through Remote Process Execution
January 1, 2010, 12:00am PST
This paper describes a new approach to power saving and battery life extension on an untethered laptop through wireless remote processing of power-costly tasks. The authors ran a series of...
Provided by University of California
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White Papers
A Programmable Impedance Matching Circuit for Voiceband Modems
August 1, 2007, 12:00am PDT
A line impedance-matching circuit for a voiceband modem is described. The circuit can be programmed to realize four different impedances. A switched-capacitor filter is used to generate the...
Provided by University of California
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White Papers
Data Privacy With Multi-Function Printers, Printers and Copiers
June 1, 2010, 12:00am PDT
Hard drives have become prevalent temporary or static storage components within many print devices. In fact, most copiers and multi-function printers manufactured since 2005 have hard drives....
Provided by University of California
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White Papers
Minuet: Rethinking Concurrency Control in Storage Area Networks
January 15, 2009, 12:00am PST
Clustered applications in storage area networks (SANs), widely adopted in enterprise datacenters, have traditionally relied on distributed locking protocols to coordinate concurrent access to...
Provided by University of California
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White Papers
Performance Analysis of Server Virtualization Networking Capability
January 1, 2010, 12:00am PST
This paper presents a comparison and analysis of the performance of the various networking capabilities and topologies used to enable a typical server virtualization environment. A fundamental...
Provided by University of California
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White Papers
An Ultimate Encoding Layer for Real-Time Packetized Voice Streaming and Experiments Over a Multi-Hop Wireless Network
October 10, 2008, 12:00am PDT
Future integrated networks are expected to offer packetized voice and other multimedia conferencing services to mobile users over wireless links. Wireless networks cannot easily support multimedia...
Provided by University of California
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White Papers
Eucalyptus: An Open-Source Cloud Computing Infrastructure
July 16, 2009, 12:00am PDT
Utility computing, elastic computing, and cloud computing are all terms that refer to the concept of dynamically provisioning processing time and storage space from a ubiquitous "Cloud" of...
Provided by University of California
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White Papers
New Advances in Self-Policing Cloud Computing
July 3, 2010, 12:00am PDT
Cloud computing is a style of computing in which dynamically scalable and often virtualized resources e.g., CPU, memory, storage, and network bandwidth are provided as a service over the Internet....
Provided by University of California
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White Papers
Spotlight: Definition of Collaborative Tools
March 1, 2009, 12:00am PST
To give a clearer understanding of the nuances intended, let's look at several examples: Communication and coordination activities may be collaborative, but are not necessarily so. Broadcasting...
Provided by University of California
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White Papers
CEO: A Cloud Epistasis computing Model in GWAS
August 20, 2010, 12:00am PDT
The 1000 Genome project has made available a large number of Single Nucleotide Polymorphisms (SNPs) for Genome-Wide Association Studies (GWAS). However, the large number of SNPs has also rendered...
Provided by University of California
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White Papers
A Design Pattern Language for Engineering (Parallel) Software
October 14, 2009, 12:00am PDT
The key to writing high quality parallel software is to develop a robust software design. This applies to the overall architecture of the program, but also to the lower layers in the software...
Provided by Regents of the University of California
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White Papers
Bit-Error Rate Estimation for Bang-Bang Clock and Data Recovery Circuit in High-Speed Serial Links
February 5, 2009, 12:00am PST
Clock and Data Recovery (CDR) circuits incorporating a bang-bang (BB) phase detector have been widely adopted in high-speed serial links due to their advantages in high speed implementations....
Provided by University of California
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White Papers
Mesos: A Platform for Fine-Grained Resource Sharing in the Data Center
May 26, 2010, 12:00am PDT
This paper present Mesos, a platform for sharing commodity clusters between multiple diverse cluster computing frameworks, such as Hadoop and MPI 1. Sharing improves cluster utilization and avoids...
Provided by University of California
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White Papers
ITS Data Center Access Policies and Procedures
March 27, 2007, 12:00am PDT
The ITS Data Center provides specific environmental, enhanced security access, fire alarms/suppression, Uninterrupted Power Supplies (UPS), Campus Backbone connectivity, and a number of other...
Provided by University of California
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White Papers
Hedera: Dynamic Flow Scheduling for Data Center Networks
March 2, 2010, 12:00am PST
Today's data centers offer tremendous aggregate bandwidth to clusters of tens of thousands of machines. However, because of limited port densities in even the highest-end switches, data center...
Provided by University of California
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