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University of British Columbia - Department of Computer Science
(147 results)-
White Papers
The Challenges of Using an Intrusion Detection System: Is It Worth the Effort?
July 25, 2008, 12:00am PDT
An Intrusion Detection System (IDS) can be a key component of security incident response within organizations. Traditionally, intrusion detection research has focused on improving the accuracy of...
Provided by University of British Columbia
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White Papers
Usability Study of Vista's Firewall Using Respondent Methods
November 22, 2007, 12:00am PST
A firewall is one of the most important security tools against network attacks. Microsoft, in its new version of the Windows, Vista, offered a new firewall with plethora of advance features that...
Provided by University of British Columbia
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On Domination Game Analysis for Microeconomic Data Mining
September 25, 2008, 12:00am PDT
Game theory is a powerful tool for the analysis of the competitions among manufacturers in a market. This paper presents a study on combining game theory and data mining by introducing the concept...
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Optimized Compressed Sensing for Curvelet-Based Seismic Data Reconstruction
December 1, 2008, 12:00am PST
Compressed Sensing (CS) or compressive sampling provides a new sampling theory to reduce data acquisition, which says that compressible signals can be exactly reconstructed from highly incomplete...
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White Papers
Usability Study of Windows Vista's Firewall
April 22, 2008, 12:00am PDT
Windows Vista is shipped with a built-in personal firewall. The firewall has lots of new features over its predecessor, XP's firewall. But, previous studies showed that Vista's firewall have a set...
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Revealing Hidden Context: Improving Mental Models of Personal Firewall Users
July 17, 2009, 12:00am PDT
The Windows Vista personal firewall provides its diverse users with a basic interface that hides many operational details. However, concealing the impact of network context on the security state...
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Project Manager to Project Leader? And the Rocky Road Between...
June 11, 2002, 12:00am PDT
The "planning" phases of a project involve the crystallizing of project goals, the development of the concepts and technical requirements and planning for implementation. These activities...
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White Papers
Visualizing High Dynamic Range Images in a Web Browser
April 20, 2009, 12:00am PDT
This paper presents a technique for embedding High Dynamic Range (HDR) images with interactive exposure control in a web browser. Multiple exposures are encoded as a combination of several basis...
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White Papers
Process and Pitfalls in Writing Information Visualization Research Papers
January 3, 2008, 12:00am PST
The goal of this paper is to help authors recognize and avoid a set of pitfalls that recur in many rejected information visualization papers, using a chronological model of the research process....
Provided by University of British Columbia
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White Papers
Choosing Effective Colours for Data Visualization
November 5, 2007, 12:00am PST
This paper has presented a simple method for choosing effective colours for use during data visualization. This is accomplished by controlling colour distance, linear separation of colours, and...
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White Papers
The "Mighty Mouse" Multi-Screen Collaboration Tool
January 1, 2010, 12:00am PST
Many computers provide seamless support for multiple display screens, but there are few cross-platform tools for collaborative use of multiple computers in a shared display environment. Authors...
Provided by University of British Columbia
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White Papers
Data Gathering in Optical Networks With the TL1 Toolkit
October 1, 2008, 12:00am PDT
This paper describes a new tool for gathering (Performance) data from optical network devices. During the last few years many National Research and Education Networks (NRENs) have deployed hybrid...
Provided by University of British Columbia
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White Papers
Performance Analysis of Free - Space Optical Systems in Gamma - Gamma Fading
March 24, 2008, 12:00am PDT
Atmospheric turbulence induced fading is one of the main impairments affecting Free - Space Optics (FSO). In recent years, Gamma - Gamma fading has become the dominant fading model for FSO links...
Provided by University of British Columbia
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Performance Analysis of Free-Space Optical Systems in Gamma-Gamma Fading
October 29, 2008, 12:00am PDT
Atmospheric turbulence induced fading is one of the main impairments affecting Free-Space Optics (FSO). In recent years, Gamma-Gamma fading has become the dominant fading model for FSO links...
Provided by University of British Columbia
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White Papers
Cooperative Protocols Design for Wireless Ad-Hoc Networks With Multi-Hop Routing
July 31, 2008, 12:00am PDT
Wireless ad-hoc networks can experience significant performance degradation under fading channels. Diversity through space has been shown to be an effective way of combating wireless fading with...
Provided by University of British Columbia
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White Papers
A Constrained MDP-Based Vertical Handoff Decision Algorithm for 4G Wireless Networks
February 11, 2008, 12:00am PST
The 4th Generation (4G) wireless communication systems aim to provide users with the convenience of seamless roaming among heterogeneous wireless access networks. To achieve this goal, the support...
Provided by University of British Columbia
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White Papers
Fast and Cautious Evolution of Cloud Storage
June 3, 2010, 12:00am PDT
When changing a storage system, the stakes are high. Any modification can undermine stability, causing temporary downtime, a permanent loss of data, and still worse - a loss of user confidence....
Provided by University of British Columbia
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White Papers
Extending the Scalability of Single Chip Stream Processors With On-Chip Caches
June 5, 2008, 12:00am PDT
As semiconductor scaling continues, more transistors can be put onto the same chip despite growing challenges in clock frequency scaling. Stream processor architectures can make effective use of...
Provided by University of British Columbia
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White Papers
A Scalable Memory Model for Low-Level Code
October 22, 2008, 12:00am PDT
Because of critical importance underlying all other software, low level system software is among the most important targets for formal verification. Low-level systems software must sometimes make...
Provided by University of British Columbia
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White Papers
Fiscal Deficits, Debt, And Monetary Policy In A Liquidity Trap
April 1, 2009, 12:00am PDT
The macroeconomic response to the economic crisis has revived old debates about the usefulness of monetary and fiscal policy in fighting recessions. Without the ability to further lower interest...
Provided by University of British Columbia
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White Papers
Tracking Usage in Collaborative Tagging Communities
June 13, 2007, 12:00am PDT
Collaborative tagging has recently attracted the attention of both industry and academia due to the popularity of content-sharing systems such as CiteULike, delicious, and Flickr. These systems...
Provided by University of British Columbia
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White Papers
Individual and Social Behavior in Tagging Systems
July 1, 2009, 12:00am PDT
In tagging systems users can annotate items of interest with freeform terms. A good understanding of the usage characteristics of such systems is necessary to improve the design of current and...
Provided by University of British Columbia
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White Papers
Inter-Session Network Coding With Strategic Users: A Game-Theoretic Analysis of Network Coding
April 19, 2009, 12:00am PDT
A common assumption in the existing network coding literature is that the users are cooperative and do not pursue their own interests. However, this assumption can be violated in practice. In this...
Provided by University of British Columbia
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White Papers
Efficient and Spontaneous Privacy-Preserving Protocol for Secure Vehicular Communications
September 8, 2009, 12:00am PDT
This paper introduces an efficient and spontaneous privacy-preserving protocol for vehicular ad-hoc networks based on revocable ring signature. The proposed protocol has three appealing...
Provided by University of British Columbia
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White Papers
Evaluating Two Window Manipulation Techniques on a Large Screen Display
April 8, 2010, 12:00am PDT
Large screen displays are a common feature of modern meeting rooms, conference halls, and classrooms. The large size and often high resolution of these displays make them inherently suitable for...
Provided by University of British Columbia
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White Papers
Technological Progress, Industry Rivalry, And Stock Returns
August 1, 2010, 12:00am PDT
In this paper the authors investigate the link between competition in technological innovation and asset prices. They develop a model of an innovation race in which firms are subject to...
Provided by University of British Columbia
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White Papers
Asset Allocation With Value-Growth Tilts And Predictability
November 26, 2007, 12:00am PST
In a study of optimal asset allocation, the author tests the significance to investor welfare of adding additional assets to the portfolio choice set and conditioning on predictor variables....
Provided by University of British Columbia
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White Papers
IPO Offer Prices And Firm Performance
October 31, 2009, 12:00am PDT
This paper explores the determinants of IPO prices and studies the relationship between price choice of firms going public and post-issue stock performance and firm characteristics. The author...
Provided by University of British Columbia
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White Papers
Excess Cash And Mutual Fund Performance
November 22, 2009, 12:00am PST
The author documents a positive relationship between excess cash holdings of actively managed equity mutual funds and future fund performance. The difference in returns of portfolios of high and...
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White Papers
Asset Liquidity And The Cost Of Capital
December 1, 2009, 12:00am PST
The authors study the effect of real asset liquidity on a firm's cost of capital. They find an aggregate asset-liquidity discount in firms' cost of capital that is strongly counter-cyclical. At...
Provided by University of British Columbia
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White Papers
Risk Factors And Distributions From Long-Short Trading Strategies: A Monte Carlo Approach
September 6, 2009, 12:00am PDT
The authors propose a simulation-based methodology for evaluating the significance of returns to long-short trading strategies and for investigating the effects of various risk adjustments and...
Provided by University of British Columbia
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White Papers
Conditional Risk And Performance Evaluation: Volatility Timing, Overconditioning, And New Estimates Of Momentum Alphas
October 27, 2009, 12:00am PDT
Unconditional alpha estimates are biased when conditional beta covaries with the market risk premium ("Market-timing") or volatility ("Volatility-timing"). Whereas prior literature focuses on...
Provided by University of British Columbia
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White Papers
Consumption Volatility Risk
May 19, 2009, 12:00am PDT
Empirically, the conditional volatility of aggregate consumption growth varies over time. While many papers test the consumption CAPM based on realized consumption growth, little is known about...
Provided by University of British Columbia
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Pyramidal Ownership And The Creation Of New Firms
August 30, 2010, 12:00am PDT
The authors study the role of pyramidal ownership in the creation of new firms using a comprehensive panel of manufacturing firms in Europe. Pyramidal ownership structures are used to supply...
Provided by University of British Columbia
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White Papers
Calibration And Filtering For Multi Factor Commodity Models With Seasonality: Incorporating Panel Data From Futures Contracts
May 31, 2011, 12:00am PDT
The authors examine a general multi-factor model for commodity spot prices and futures valuation. They extend the multi-factor long-short model in and in two important aspects: firstly, they allow...
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White Papers
Clustered Signatures for Modeling and Recognizing 3D Rigid Objects
June 17, 2009, 12:00am PDT
Three-dimensional model-based object representation uses the geometry of an object for modeling. In this method, an object's geometric properties and relations are extracted and stored as a model...
Provided by University of British Columbia
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White Papers
Network-on-Chip Micro-Benchmarks
September 28, 2008, 12:00am PDT
The rapid development of Network-on-Chip (NoC) calls for a systematic approach to evaluate and fairly compare various NoC architectures. In this specification, the authors define a generic NoC...
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White Papers
A Unified Formulation of the Multicast Lifetime Optimization Problem in WANETs
May 17, 2008, 12:00am PDT
The authors consider the problem of maximizing the lifetime of a given multicast connection in wireless networks that use directional antennas and have limited energy resources. They provide a...
Provided by University of British Columbia
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White Papers
Reducing Re-Authentication Delays During UMTS-WLAN Vertical Handovers
June 19, 2008, 12:00am PDT
Interworking Universal Mobile Telecommunication Systems (UMTS) and IEEE 802.11 Wireless Local Area Networks (WLANs) introduces new challenges in the design of secured and fast Vertical Handover...
Provided by University of British Columbia
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White Papers
A Reliable Robust Fully Ad Hoc Data Dissemination Mechanism for Vehicular Networks
January 1, 2009, 12:00am PST
Many applications in vehicular networks need the data to be disseminated from a source vehicle to a large number of vehicles in the network. Although many solutions to this problem have been...
Provided by University of British Columbia
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Whitepapers
New Algorithms for QoS Performance Improvement in High Speed Networks
December 1, 2008, 12:00am PST
In this paper, the authors addressed the issue, how to provide QoS control and improve performance in high speed Optical Burst Switching (OBS) networks. In order to provide better proportional...
Provided by University of British Columbia - Department of Computer Science
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Whitepapers
Analyze of the MPEG-4 Compressed Streams
September 1, 2009, 12:00am PDT
In this paper, a measurement system is proposed for the test of the DVB (Digital Video Broadcasting) receivers. In this an analysis of baseband transmission channel parameters in DVB Video signal...
Provided by University of British Columbia - Department of Computer Science
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Whitepapers
Profit Maximization Over Social Networks
October 17, 2012, 12:00am PDT
Influence maximization is the problem of finding a set of influential users in a social network such that the expected spread of influence under a certain propagation model is maximized. Much of...
Provided by University of British Columbia
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Whitepapers
Evolutionary Search-Based Test Generation for Software Product Line Feature Models
December 2, 2011, 12:00am PST
Product line-based software engineering is a paradigm that models the commonalities and variabilities of different applications of a given domain of interest within a unique framework and enhances...
Provided by University of British Columbia
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White Papers
Schedule Data, Not Code
April 19, 2011, 12:00am PDT
In this paper, the authors argue that the scheduler, as the intermediary between hardware and software, needs to be fully data-aware. The old paradigm of envisioning tasks as amorphous blobs of...
Provided by University of British Columbia
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White Papers
Verifying Heap-Manipulating Programs in an SMT Framework
July 29, 2007, 12:00am PDT
Automated software verification has made great progress recently, and a key enabler of this progress has been the advances in efficient, automated decision procedures suitable for verification...
Provided by University of British Columbia
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White Papers
Boosting Verification by Automatic Tuning of Decision Procedures
September 8, 2007, 12:00am PDT
Parameterized heuristics abound in computer aided design and verification, and manual tuning of the respective parameters is difficult and time-consuming. Very recent results from the Artificial...
Provided by University of British Columbia
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White Papers
Distributed Transmit Power Allocation for Relay-Assisted Cognitive-Radio Systems
October 30, 2007, 12:00am PDT
The authors address the issue of optimal transmit power allocation in relay-assisted Cognitive-Radio (CR) systems. In particular, they assume that the frequency band chosen for unlicensed spectrum...
Provided by University of British Columbia
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White Papers
Pre-Equalization for Pre-Rake MISO DS-UWB Systems
January 24, 2008, 12:00am PST
In this paper, the authors propose two novel pre-equalization schemes for Multiple-Input Single-Output (MISO) Direct-Sequence Ultra-WideBand (DS-UWB) systems with pre-Rake combining and symbol -...
Provided by University of British Columbia
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White Papers
Enhancement of the ECMA-368 UWB System by Means of Compatible Relaying Techniques
June 21, 2008, 12:00am PDT
The authors assess the benefits of relaying techniques with regard to the performance of ECMA-368 ultra wideband radio systems. To this end, they closely follow the current ECMA-368 standard and...
Provided by University of British Columbia
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White Papers
Performance Analysis for a Fully Decentralized Transmit Power Allocation Scheme for Relay-Assisted Cognitive-Radio Systems
August 15, 2008, 12:00am PDT
The authors analyze the performance of a Fully Decentralized (FD) Transmit Power Allocation (TPA) scheme for relay-assisted Cognitive-Radio (CR) systems. In particular, they assume that the...
Provided by University of British Columbia
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White Papers
On the Performance of Non-Coherent Transmission Schemes With Equal-Gain Combining in Correlated Generalized K-Fading
June 10, 2009, 12:00am PDT
The generalized K-fading model, characterized by two parameters, k and m, was recently shown to accurately capture the effects of composite shadowing and multipath fading in wireless communication...
Provided by University of British Columbia
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White Papers
Double-Differential Encoding for Dual-Hop Amplify-and-Forward Relaying in IR-UWB Systems
January 13, 2010, 12:00am PST
In this paper, the authors propose to improve the performance of impulse-radio ultra-wideband (IR-UWB) systems by means of cooperative relaying. With regard to a simple practical realization, they...
Provided by University of British Columbia
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White Papers
DoDOM: Leveraging DOM Invariants for Web 2.0 Application Robustness Testing
August 15, 2010, 12:00am PDT
Web 2.0 applications are increasing in popularity. However, they are also prone to errors because of their dynamic nature. This paper presents DoDOM, an automated system for testing the robustness...
Provided by University of British Columbia
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White Papers
Bounding Interference in Wireless Ad Hoc Networks With Nodes in Random Position
November 29, 2011, 12:00am PST
The interference at a wireless node s can be modelled by the number of wireless nodes whose trans-mission ranges cover s. Given a set of positions for wireless nodes, the interference minimization...
Provided by University of British Columbia
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White Papers
A High-Performance GriFTP Server at Desktop Cost
October 14, 2007, 12:00am PDT
The authors prototype a storage system that provides the access performance of a well-endowed GridFTP deployment (e.g., using a cluster and a parallel file-system) at the modest cost of single...
Provided by University of British Columbia
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White Papers
Aggregate Memory as an Intermediate Checkpoint Storage Device
November 17, 2008, 12:00am PST
Applications that generate bursty I/O load, like check-pointing, require additional support to perform efficiently on next generation peta-scale supercomputers. Tens of thousands of processors,...
Provided by University of British Columbia
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White Papers
Context-Aware Mobility Management in Heterogeneous Network Environments
July 7, 2011, 12:00am PDT
Context-aware mobility management can provide major enhancements for future mobile communication systems. Not only it considers device mobility, but session mobility is also considered....
Provided by University of British Columbia
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White Papers
Inferring Power Line Network Topology Using Frequency Domain Reflectometry
September 21, 2011, 12:00am PDT
Power Line Communications (PLC) is an attractive means of data communication for a variety of scenarios and applications, including in-home multimedia and utility applications, the latter of which...
Provided by University of British Columbia
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White Papers
Neighborhood-Knowledge Based Routing in PLC
September 21, 2011, 12:00am PDT
One of the challenges of employing Power Line Communication (PLC) in power distribution grids is routing messages using multihop transmission or, in other words, by relaying information through...
Provided by University of British Columbia
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White Papers
Charge-Borrowing Decap: A Novel Circuit for Removal of Local Supply Noise Violations
April 18, 2009, 12:00am PDT
The authors propose a novel circuit called Charge-Borrowing Decap (CBD) as a drop-in replacement for passive decaps to reduce supply noise for removal of "Hot-spot" IR-drop problems found late in...
Provided by University of British Columbia
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White Papers
Simultaneous PVT-Tolerant Voltage-Island Formation and Core Placement for Thousand-Core Platforms
July 22, 2009, 12:00am PDT
In this paper, the authors propose a novel approach to voltage island formation and core placement for energy optimization in many-core architectures under parameter variations at pre-fabrication...
Provided by University of British Columbia
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White Papers
GlitchLess: Dynamic Power Minimization in FPGAs Through Edge Alignment and Glitch Filtering
December 6, 2007, 12:00am PST
This paper describes Glitchless, a circuit-level technique for reducing power in FPGAs by eliminating unnecessary logic transitions called glitches. This is done by adding programmable delay...
Provided by University of British Columbia
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Memory Footprint Reduction for FPGA Routing Algorithms
January 4, 2008, 12:00am PST
In this paper, the authors present a technique to reduce the run-time memory footprint of FPGA routing algorithms. These algorithms require a representation of the physical routing resources and...
Provided by University of British Columbia
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A System-Level Stochastic Circuit Generator for FPGA Architecture Evaluation
September 14, 2008, 12:00am PDT
The authors describe a stochastic circuit generator that can be used to automatically create benchmark circuits for use in FPGA architecture studies. The circuits consist of a hierarchy of...
Provided by University of British Columbia
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Modeling the Relationship Between FPGA Architecture and Place and Route Runtime
June 10, 2009, 12:00am PDT
This paper presents an analytical model that relates the architectural parameters of an FPGA to the place-and-route runtimes of the FPGA CAD tools. The authors consider both a simulated annealing...
Provided by University of British Columbia
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An Analytical Model Describing the Relationships Between Logic Architecture and FPGA Density
June 13, 2008, 12:00am PDT
This paper describes an analytical model, based principally on Rent's Rule, that relates logic architectural parameters to the area efficiency of an FPGA. In particular, the model relates the...
Provided by University of British Columbia
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Modeling Post-Techmapping and Post-Clustering FPGA Circuit Depth
June 10, 2009, 12:00am PDT
This paper presents an analytical model that relates FPGA architectural parameters to the expected speed of FPGA implementation. More precisely, the model relates the lookup-table size, cluster...
Provided by University of British Columbia
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White Papers
Parallax: Virtual Disks for Virtual Machines
January 22, 2008, 12:00am PST
Parallax is a distributed storage system that uses virtualization to provide storage facilities specifically for virtual environments. The system employs a novel architecture in which storage...
Provided by University of British Columbia
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White Papers
Remus: High Availability Via Asynchronous Virtual Machine Replication
February 20, 2008, 12:00am PST
Allowing applications to survive hardware failure is an expensive undertaking, which generally involves re-engineering software to include complicated recovery logic as well as deploying...
Provided by University of British Columbia
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White Papers
Block Mason
November 3, 2008, 12:00am PST
Hardware virtualization gives administrators the flexibility to rapidly create, destroy and relocate virtual machines across physical hosts. Unfortunately, the storage systems upon which these...
Provided by University of British Columbia
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White Papers
Exposing File System Mappings With MapFS
May 9, 2011, 12:00am PDT
The conventional model of a file as a contiguous array of bytes hides information about the physical location of data from users. While this simplifying abstraction can be useful in some cases, it...
Provided by University of British Columbia
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White Papers
Profiling-as-a-Service: Adaptive Scalable Resource Profiling for the Cloud in the Cloud
June 10, 2011, 12:00am PDT
Run-time profiling of Web-based applications and services is an effective method to aid in the provisioning of required resources, for monitoring server-level objectives, and for detecting...
Provided by University of British Columbia
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White Papers
An RL-Based Scheduling Algorithm for Video Traffic in High-Rate Wireless Personal Area Networks
March 21, 2009, 12:00am PDT
The emerging high-rate Wireless Personal Area Network (WPAN) technology is capable of supporting high-speed and high-quality real-time multimedia applications. In particular, video streams are...
Provided by University of British Columbia
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White Papers
A Compressed Sensing Receiver for UWB Impulse Radio in Bursty Applications Like Wireless Sensor Networks
August 20, 2009, 12:00am PDT
The authors propose a novel receiver for Ultra-Wide-band Impulse-Radio communication in Wireless Sensor Networks, which are characterized by bursty traffic and severe power constraints. The...
Provided by University of British Columbia
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White Papers
An Analytical Approach for Performance Evaluation of BICM Transmission over Nakagami-m Fading Channels
August 13, 2009, 12:00am PDT
Bit-Interleaved Coded Modulation (BICM) has established itself as a quasi-standard for bandwidth- and power-efficient wireless communication. In this paper, the authors present an analytical...
Provided by University of British Columbia
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White Papers
Opportunistic Spectral Access Through Suppression of Impulsive Interference
January 29, 2010, 12:00am PST
Cognitive radios are slated to be the next generation of smart transceivers that can opportunistically access spectrum through dynamic sensing of their immediate Radio Frequency (RF) environment....
Provided by University of British Columbia
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White Papers
Bit-Interleaved Coded Modulation With Mismatched Decoding Metrics
September 9, 2010, 12:00am PDT
Bit-Interleaved Coded Modulation (BICM) has become the de facto coding standard for communication systems. Recently, BICM has been cast as a mismatched decoding scheme due to the assumption of...
Provided by University of British Columbia
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White Papers
Dynamic Decode-and-Forward Relaying Using Raptor Codes
February 1, 2011, 12:00am PST
Dynamic Decode-and-Forward (DDF) is a version of decode-and-forward relaying in which the duration of the listening phase at relays is not fixed. In this paper, the authors investigate half-duplex...
Provided by University of British Columbia
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White Papers
On Cooperative Coding for Narrowband PLC Networks
April 8, 2011, 12:00am PDT
Low-Frequency NarrowBand (LF NB) Power Line Communications (PLC) is an old data-communication concept that has received renewed interest in industry, standardization, and academia for its...
Provided by University of British Columbia
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