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University of California
(1028 results)-
White Papers
Fast and Optimal Scheduling Over Multiple Network Interfaces
October 10, 2007, 12:00am PDT
Today's mobile phones already contain two or more network interfaces (NICs) and future devices are likely to have several more, each with different energy costs, dollar costs, and data...
Provided by University of California
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Whitepapers
Tackling Intracell Variability in TLC Flash Through Tensor Product Codes
May 17, 2012, 12:00am PDT
Flash memory is a promising new storage technology. To fully utilize future multi-level cell Flash memories, it is necessary to develop error correction coding schemes attuned to the underlying...
Provided by University of California
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Whitepapers
The Bleak Future of NAND Flash Memory
February 10, 2012, 12:00am PST
In recent years, flash-based SSDs have grown enormously both in capacity and popularity. In highperformance enterprise storage applications, accelerating adoption of SSDs is predicated on the...
Provided by University of California
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Whitepapers
Characterization and Error-Correcting Codes for TLC Flash Memories
August 23, 2011, 12:00am PDT
Flash memory has become the storage medium of choice in portable consumer electronic applications, and high performance Solid State Drives (SSDs) are also being introduced into mobile computing,...
Provided by University of California
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Whitepapers
Underdesigned and Opportunistic Computing
October 2, 2011, 12:00am PDT
Variation in the specifications of microelectronic chips across parts and over time has been a great source of concern for the integrated circuit chip designers because of the ever-increasing...
Provided by University of California
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White Papers
Big-Data Computing: Creating Revolutionary Breakthroughs in Commerce, Science, and Society
December 22, 2008, 12:00am PST
Advances in digital sensors, communications, computation, and storage have created huge collections of data, capturing information of value to business, science, government, and society. For...
Provided by University of California
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White Papers
Network Sensitivity to Intradomain Routing Changes
January 1, 2010, 12:00am PST
The Internet's routing architecture was designed to have a clean separation between the intradomain and interdomain routing protocols. However, the appropriate division of labor between these two...
Provided by University of California
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White Papers
Code Generation for Embedded Java With Ptolemy
July 30, 2010, 12:00am PDT
Code generation from models is the ultimate goal of model-based design. For real-time systems the generated code must be analyzable for the worst-case execution time (WCET). This paper evaluates...
Provided by University of California
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White Papers
A Novel SLA Framework for Time-Differentiated Resilience in Optical Mesh Networks
June 25, 2010, 12:00am PDT
Telecom customers may have specific time periods during which they require extra resilience. However, these time-differentiated resilience requirements are not effectively addressed by current SLA...
Provided by University of California
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Whitepapers
3D-FlashMap: A Physical-Location-Aware Block Mapping Strategy for 3D NAND Flash Memory
September 16, 2011, 12:00am PDT
Three-Dimensional (3D) flash memory is emerging to fulfill the ever-increasing demands of storage capacity. In 3D NAND flash memory, multiple layers are stacked to increase bit density and reduce...
Provided by University of California
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Whitepapers
Memory-Side Acceleration for XML Parsing
June 22, 2011, 12:00am PDT
As Extensible Markup Language (XML) becomes prevalent in cloud computing environments, it also introduces significant performance overheads. In this paper, the authors analyze the performance of...
Provided by University of California
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Whitepapers
Resource Sharing Control in Simultaneous MultiThreading Microarchitectures
March 28, 2008, 12:00am PDT
Simultaneous MultiThreading (SMT) achieves improved system resource utilization and accordingly higher instruction throughput because it exploits Thread-Level Parallelism (TLP) in addition to...
Provided by University of California
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White Papers
Grooming and Protection With Availability Guarantees in Multilayer Optical Networks
October 15, 2008, 12:00am PDT
Survivability is a key concern in modern network design. This paper investigates the problem of survivable dynamic connection provisioning in general telecom backbone networks, which are mesh...
Provided by University of California
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White Papers
Design and Analysis of Wireless-Optical Broadband Access Networks (WOBAN)
June 1, 2008, 12:00am PDT
The growing customer demands for bandwidth-intensive services are accelerating the need to design an efficient "Last Mile" access network in a cost-effective manner. Traditional "Quad-Play"...
Provided by University of California
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White Papers
Backup Path Allocation Based on a Correlated Link Failure Probability Model in Overlay Networks
January 1, 2010, 12:00am PST
Communication reliability is a desired property in computer networks. One key technology to increase the reliability of a communication path is to provision a disjoint backup path. One of the main...
Provided by University of California
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White Papers
Do-It-Yourself Database-Driven Web Applications
March 17, 2009, 12:00am PDT
UCSD's app2you project and its successor FORWARD project belong to the emerging space of Do-It-Yourself (DIY), custom, hosted, database-driven web application platforms that empower non-programmer...
Provided by University of California
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White Papers
A Wireless Mesh Infrastructure Deployment With Application for Emergency Scenarios
June 3, 2008, 12:00am PDT
When a disaster or emergency occurs, one of the most pressing needs is to establish a communication network for the first responders at the scene. Establishing and accessing a reliable...
Provided by University of California
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White Papers
Localization and Clock Synchronization Need Similar Hardware Support in Wireless LANs
August 25, 2008, 12:00am PDT
Secure localization protocols enable a group of cooperating verifier nodes in a wireless LAN to determine the physical location of a stranger called the prover, using precision timing measurements...
Provided by University of California
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White Papers
Data Management Challenges in Cloud Computing Infrastructures
March 17, 2010, 12:00am PDT
The challenge of building consistent, available, and scalable data management systems capable of serving petabytes of data for millions of users has confronted the data management research...
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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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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-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
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
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
ILS: Instant Localization Scheme for Underwater Mobile Networks
October 14, 2011, 12:00am PDT
Mobile underwater networks have recently been proposed as a way to explore and observe the ocean with a wide area coverage at reasonable cost when compared to traditional tethered approaches...
Provided by University of California
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White Papers
Towards Personal Content Networking
August 17, 2011, 12:00am PDT
Recent advances of technology in consumer electronics have promoted a lifestyle where people live with convenience and ease by accessing any kind of information at their finger tips. These devices...
Provided by University of California
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White Papers
Scalable Emulation of TinyOS Applications in Heterogeneous Network Scenarios
September 16, 2009, 12:00am PDT
Simulating the behavior of sensor applications in a heterogeneous network or under diverse environmental conditions is particularly challenging. In this paper, the authors present the design and...
Provided by University of California
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White Papers
Opportunistic Medical Monitoring Using Bluetooth P2P Networks
February 19, 2008, 12:00am PST
Remote medical monitoring using body sensors and wireless communications has been gaining attention recently because of the potential savings in patient care and the equally impressive...
Provided by University of California
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White Papers
Content Distribution in VANETs Using Network Coding: The Effect of Disk I/O and Processing O/H
March 20, 2008, 12:00am PDT
Besides safe navigation (e.g., warning of approaching vehicles), car to car communications will enable a host of new applications, ranging from office-on-the-wheel support to entertainment. One of...
Provided by University of California
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White Papers
Performance Evaluation of Secure Network Coding Using Homomorphic Signature
May 23, 2011, 12:00am PDT
Network coding has gained significant attention by improving throughput and reliability in disruptive MANETs. Yet, it is vulnerable to attacks from malicious nodes. In order to prevent malicious...
Provided by University of California
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White Papers
Collision-Free Asynchronous Multi-Channel Access in Ad Hoc Networks
August 14, 2009, 12:00am PDT
In this paper, the authors present a collision-free asynchronous multi-channel access protocol for Ad Hoc wireless networks using a single transceiver. Their protocol, dubbed AMMAC for...
Provided by University of California
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White Papers
The Case for Using Traffic Forecasting in Schedule-Based Channel Access
September 30, 2010, 12:00am PDT
In this paper, the authors explore the idea of using traffic forecasting to improve the delay performance of a schedule-based medium access control protocol. Schedule-based channel access has been...
Provided by University of California
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White Papers
A Flexible In-Network IP Anonymization Service
February 29, 2012, 12:00am PST
User privacy on the Internet has been an increasing concern in recent years. With the proliferation and sophistication of information services, data mining, and search engines, a simple network...
Provided by University of California
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White Papers
SCORPION: A Heterogeneous Wireless Networking Testbed
April 28, 2009, 12:00am PDT
During the last decade, the success and popularity of wireless standards such as IEEE 802.11 have drawn the attention of the research community to wireless networks. A great amount of effort has...
Provided by University of California
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White Papers
Organizing Large Scale Hacking Competitions
June 23, 2010, 12:00am PDT
Computer security competitions and challenges are a way to foster innovation and educate students in a highly-motivating setting. In recent years, a number of different security competitions and...
Provided by University of California
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White Papers
Leveraging Social Contacts for Message Confidentiality in Delay Tolerant Networks
April 29, 2009, 12:00am PDT
Delay- and Disruption-Tolerant Networks (DTNs) can bring much-needed connectivity to rural areas and other settings with limited or non-existing infrastructures. High node mobility and infrequent...
Provided by University of California
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White Papers
Line and Lattice Networks Under Deterministic Interference Models
September 30, 2010, 12:00am PDT
Capacity bounds are compared for four different deterministic models of wireless networks, representing four different ways of handling broadcast and superposition in the physical layer. In...
Provided by University of California
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White Papers
A Smart Sensor Web for Ocean Observation: System Design, Architecture, and Performance
May 18, 2007, 12:00am PDT
Much of the cost and effort of new ocean observatories will be in the infrastructure that directly supports sensors, such as moorings and mobile platforms, which in turn connect to a "Backbone"...
Provided by University of California
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White Papers
Reducing Errors in the Anomaly-Based Detection of Web-Based Attacks Through the Combined Analysis of Web Requests and SQL Queries
February 20, 2008, 12:00am PST
Web-based applications have become a popular means of exposing functionality to large numbers of users by leveraging the services provided by web servers and databases. The wide proliferation of...
Provided by University of California
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White Papers
Static Enforcement of Web Application Integrity Through Strong Typing
June 2, 2009, 12:00am PDT
Security vulnerabilities continue to plague web applications, allowing attackers to access sensitive data and co-opt legitimate web sites as a hosting ground for malware. Accordingly, researchers...
Provided by University of California
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White Papers
MIMO and TCP: A Case for Cross Layer Design
August 24, 2007, 12:00am PDT
TCP has not fared well in wireless ad hoc networks. Even in a perfectly static network, there is the problem of throughput degradation due to the interference between flows, which becomes more...
Provided by University of California
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White Papers
Performance of Transmit Precoding in Time-Varying Point-to-Point and Multi-User MIMO Channels
January 22, 2008, 12:00am PST
Transmit precoding strategies in Multiple-Input Multiple-Output (MIMO) systems provide a mechanism for increasing the performance of point-to-point links and enable spatial division multiple...
Provided by University of California
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White Papers
Covariance Based Signaling and Feedback Data Parameterization for the TimeVarying MIMO Broadcast Channel
April 13, 2010, 12:00am PDT
Linear precoding (beamforming) techniques that maximize the sum rate in the multi-antenna broadcast channel often suffer severe performance degradation when the channel state information at the...
Provided by University of California
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White Papers
Outage-Optimal Transmission in Multiuser-MIMO Kronecker Channels
January 11, 2010, 12:00am PST
In this paper, the authors look at single user and multiuser Multiple-Input Multiple-Output (MIMO) beamforming networks with Channel Distribution Information (CDI). CDI does not need to be updated...
Provided by University of California
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White Papers
Spatial Multiplexing in Random Wireless Networks
April 1, 2010, 12:00am PDT
The authors consider a network of transmitters, each with a receiver at a fixed distance, and locations drawn independently according to a homogeneous Poisson Point Process (PPP). The transmitters...
Provided by University of California
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White Papers
A Delay-Minimizing Routing Strategy for Wireless Multi-Hop Networks
May 13, 2009, 12:00am PDT
The authors consider a network where each route comprises a backlogged source, a number of relays and a destination at a finite distance. The locations of the sources and the relays are...
Provided by University of California
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White Papers
Evaluating Mobility Support in ZigBee Networks
August 27, 2007, 12:00am PDT
The deployment of ZigBee networks is expected to facilitate numerous applications, such as home healthcare, medical monitoring, consumer electronics, and environmental sensors. For many envisioned...
Provided by University of California
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White Papers
PBProbe: A Capacity Estimation Tool for High Speed Networks
May 19, 2008, 12:00am PDT
Knowledge about the bottleneck capacity of an Internet path is critical for efficient network design, management, and usage. In this paper, the authors propose a new technique, called PBProbe, for...
Provided by University of California
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White Papers
Interactive Visual Analysis of Hierarchical Enterprise Data
August 14, 2010, 12:00am PDT
In this paper, the authors present an interactive visual technique for analyzing and understanding hierarchical data, which they have applied to analyzing a corpus of technical reports produced by...
Provided by University of California
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White Papers
SUDOKU: Secure and Usable Deployment of Keys on Wireless Sensors
December 13, 2010, 12:00am PST
Initial deployment of secrets plays a crucial role in any security design, but especially in hardware constrained wireless sensor networks. Many key management schemes assume either manually...
Provided by University of California
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White Papers
Mining Ventilation Automation: Wireless Sensing, Communication Architecture and Advanced Services
July 15, 2008, 12:00am PDT
This paper reports on the definition of technical challenges for the sensing and communication networks of a mining ventilation automation project. Specifically, complex network architectures...
Provided by University of California
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White Papers
Reducing Seek Overhead With Application-Directed Prefetching
December 17, 2009, 12:00am PST
An analysis of performance characteristics of modern disks finds that prefetching can improve the performance of non-sequential read access patterns by an order of magnitude or more, far more than...
Provided by University of California
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White Papers
Heuristic Evaluation of Programming Language Features
February 11, 2011, 12:00am PST
Usability is an important feature for programming languages. However, user studies which compare programming languages or systems are both very expensive and typically inconclusive. In this paper,...
Provided by University of California
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White Papers
A Tool-Based Approach to Teaching Parallel and Concurrent Programming
October 21, 2010, 12:00am PDT
Today, multicore computers are commonplace and university curricula are lagging behind. The authors need to work concurrency and parallelism into introductory courses, while also maintaining...
Provided by University of California
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White Papers
User Evaluation of Correctness Conditions: A Case Study of Cooperability
October 21, 2010, 12:00am PDT
In order to find and fix concurrency bugs, programmers must reason about different possible thread inter-leavings - context switches may occur at any program point, all with the potential for...
Provided by University of California
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White Papers
DP-FAIR: A Simple Model for Understanding Optimal Multiprocessor Scheduling
April 23, 2010, 12:00am PDT
The authors consider the problem of optimal real-time scheduling of periodic and sporadic tasks for identical multiprocessors. A number of recent papers have used the notions of fluid scheduling...
Provided by University of California
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White Papers
Power Adaptive Broadcasting With Local Information in Ad Hoc Networks
January 1, 2012, 12:00am PST
Network wide broadcasting is an energy intensive function. In this paper, the authors propose a new method that performs transmission power adaptations based on information available locally, to...
Provided by University of California
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White Papers
Enhancing LRU Replacement Via Phantom Associativity
January 24, 2012, 12:00am PST
In this paper, the authors propose a novel cache design, Phantom Associative Cache (PAC), that alleviates cache thrashing in L2 caches by keeping the in-cache data blocks for a longer time period....
Provided by University of California
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White Papers
Identifying the Root Causes of Memory Bugs Using Corrupted Memory Location Suppression
January 1, 2012, 12:00am PST
The authors present a general approach for automatically isolating the root causes of memory-related bugs in software. Their approach is based on the observation that most memory bugs involve uses...
Provided by University of California
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White Papers
BugFix: A Learning-Based Tool to Assist Developers in Fixing Bugs
January 1, 2012, 12:00am PST
The authors present a tool called BugFix that can assist developers in fixing program bugs. Their tool automatically analyzes the debugging situation at a statement and reports a prioritized list...
Provided by University of California
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White Papers
Effective and Efficient Localization of Multiple Faults Using Value Replacement
January 1, 2012, 12:00am PST
The authors previously presented a fault localization technique called Value Replacement that repeatedly alters the state of an executing program to locate a faulty statement. The technique...
Provided by University of California
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White Papers
Photonic Many-Core Architecture Study
May 29, 2008, 12:00am PDT
Several recent device technology developments have been fundamentally changing the microprocessor architecture design space. These developments include photonic interconnects, feature size...
Provided by University of California
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White Papers
Efficient Synthesis of Networks on Chip
January 1, 2012, 12:00am PST
The authors propose an efficient heuristic for the Constraint-Driven Communication Synthesis (CDCS) of on-chip communication networks. The complexity of the synthesis problems comes from the...
Provided by University of California
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White Papers
Architecture, Control, and Management of Optical Switching Networks
August 22, 2007, 12:00am PDT
The authors present Dynamic Circuit Switching (DCS) as a new paradigm for telecom backbone networks. DCS is well suited for optical networks and can support emerging services such as...
Provided by University of California
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