- Subscribe to this page:
- RSS
- Email Alert
University of Calgary
(206 results)-
Whitepapers
Maintaining Connectivity in Dynamic Multimodal Network Models
June 27, 2007, 12:00am PDT
Network data models are frequently used as a mechanism to describe the connectivity between spatial features in many emerging GIS applications (location-based services, transportation design,...
Provided by University of Calgary
-
Whitepapers
Testing for Neglected Nonlinearity Using Regularized Articial Neural Networks
April 1, 2012, 12:00am PDT
The Artificial Neural Network (ANN) test of Lee, White and Granger (LWG, 1993) uses the ability of the ANN activation functions in the hidden layer to detect neglected functional misspecification....
Provided by University of Calgary
-
Whitepapers
Versioning of Network Models in a Multiuser Environment
September 11, 2009, 12:00am PDT
The standard database mechanisms for concurrency control, which include transactions and locking protocols, do not provide the support needed for updating complex geographic data in a multiuser...
Provided by University of Calgary
-
Whitepapers
Line-of-sight Visible Light Communication System Design and Demonstration
May 5, 2010, 12:00am PDT
With the emergence of high lumen output white lighting LEDs, visible light communication has become an intriguing technology to realize low cost data transmission in conjunction with lighting. In...
Provided by University of Calgary
-
Whitepapers
Computing and Communications
March 28, 2008, 12:00am PDT
A recent survey showed that more than half of higher education institutions have seen an increase in the use of high-performance computing, high-performance networking and data storage and are...
Provided by University of Calgary
-
Whitepapers
Weak Data Secrecy via Obfuscation in Network Coding Based Content Distribution
October 5, 2008, 12:00am PDT
Content distribution systems benefit from network coding in terms of error/loss protection and faster dissemination at the cost of exposing the data to intermediate nodes that are not the intended...
Provided by University of Calgary
-
Whitepapers
NC-Audit: Auditing for Network Coding Storage
June 2, 2012, 12:00am PDT
Network coding-based storage has recently received a lot of attention in the network coding community. Independently, another body of work has proposed integrity checking schemes for cloud...
Provided by University of Calgary
-
Whitepapers
Investigating User Privacy in Android Ad Libraries
April 29, 2012, 12:00am PDT
Recent years have witnessed incredible growth in the popularity and prevalence of smart phones. A flourishing mobile application market has evolved to provide users with additional functionality...
Provided by University of Calgary
-
Whitepapers
AndroidLeaks: Automatically Detecting Potential Privacy Leaks in Android Applications on a Large Scale
June 15, 2012, 12:00am PDT
As mobile devices become more widespread and powerful, they store more sensitive data, which includes not only users' personal information but also the data collected via sensors throughout the...
Provided by University of Calgary
-
Whitepapers
On the Practicality of Motion Based Keystroke Inference Attack
June 15, 2012, 12:00am PDT
Recent researches have shown that motion sensors may be used as a side channel to infer keystrokes on the touch-screen of Smartphones. However, the practicality of this attack is unclear. For...
Provided by University of Calgary
-
Whitepapers
Why Let Resources Idle? Aggressive Cloning of Jobs With Dolly
May 16, 2012, 12:00am PDT
Despite prior research on outlier mitigation, the authors analysis of jobs from the Facebook cluster shows that outliers still occur, especially in small jobs. Small jobs are particularly...
Provided by University of Calgary
-
Whitepapers
PACMan: Coordinated Memory Caching for Parallel Jobs
April 8, 2012, 12:00am PDT
Data-intensive analytics on large clusters is important for modern Internet services. As machines in these clusters have large memories, in-memory caching of inputs is an effective way to speed up...
Provided by University of Calgary
-
Whitepapers
Precomputing Possible Configuration Error Diagnoses
November 2, 2011, 12:00am PDT
Complex software packages, particularly systems software, often require substantial customization before being used. Small mistakes in configuration can lead to hard-to-diagnose error messages....
Provided by University of Calgary
-
Whitepapers
Design Implications for Enterprise Storage Systems Via Multi-Dimensional Trace Analysis
August 30, 2011, 12:00am PDT
Enterprise storage systems are facing enormous challenges due to increasing growth and heterogeneity of the data stored. Designing future storage systems requires comprehensive in-sights that...
Provided by University of Calgary
-
Whitepapers
Automating Application Deployment in Infrastructure Clouds
October 4, 2011, 12:00am PDT
Cloud computing systems are becoming an important platform for distributed applications in science and engineering. Infrastructure as a Service (IaaS) clouds provide the capability to provision...
Provided by University of Calgary
-
Whitepapers
Cloud Platform Datastore Support
September 13, 2012, 12:00am PDT
There are many datastore systems to choose from that differ in many ways including public versus private cloud support, data management interfaces, programming languages, supported feature sets,...
Provided by University of Calgary
-
Whitepapers
A Pluggable Autoscaling Service for Open Cloud PaaS Systems
August 28, 2012, 12:00am PDT
In this paper, the authors present the design, implementation, and evaluation of a pluggable autoscaler within an open cloud Platform-as-a-Service (PaaS). They redefine High Availability (HA) as...
Provided by University of Calgary
-
Whitepapers
User Selection in Multiuser MIMO Systems With Secrecy Considerations
December 7, 2009, 12:00am PST
This paper investigates simple user selection strategies in a multiuser downlink system with a single transmitter, multiple legitimate receivers, and a single eavesdropper, where all nodes are...
Provided by University of Calgary
-
Whitepapers
Wireless Relay Communications With Unmanned Aerial Vehicles: Performance and Optimization
August 19, 2010, 12:00am PDT
In this paper, the authors investigate a communication system in which Unmanned Aerial Vehicles (UAVs) are used as relays between ground-based terminals and a network base-station. They develop an...
Provided by University of Calgary
-
Whitepapers
Dynamic UAV Relay Positioning for the Ground-to-Air Uplink
August 26, 2010, 12:00am PDT
In this paper, the authors consider a collection of mobile single-antenna ground nodes communicating with a multi-antenna Unmanned Aerial Vehicle (UAV) on a multiple-access ground-to-air wireless...
Provided by University of Calgary
-
Whitepapers
Closed-Loop Tracking Using Multimodal RF/EO Sensors
November 18, 2010, 12:00am PST
This paper addresses the problem of using multiple, spatially distributed RF/EO sensors for target tracking. Data from the multi-modal sensors is collected at a fusion center, and used to track...
Provided by University of Calgary
-
Whitepapers
MIMO Interference Channel With Confidential Messages: Game Theoretic Beamforming Designs
November 3, 2010, 12:00am PDT
The authors study the achievable rate regions of the Multiple-Input Multiple-Output (MIMO) interference channel with confidential messages sent to two receivers. Under this model, each receiver is...
Provided by University of Calgary
-
Whitepapers
Securing Multi-Antenna Two-Way Relay Channels With Analog Network Coding Against Eavesdroppers
November 25, 2010, 12:00am PST
This paper investigates the vulnerability of Analog Network Coding (ANC) to physical layer attacks from adversarial users, when all nodes are equipped with multiple antennas. Specifically, the...
Provided by University of Calgary
-
Whitepapers
Downlink Resource Allocation for Multi-User MIMO-OFDMA Systems: The Kalai-Smorodinsky Bargaining Approach
October 16, 2009, 12:00am PDT
As a promising technology to significantly increase the spectral efficiency of wireless systems, Multiple-Input and Multiple-Output (MIMO) techniques have drawn much attention over the past two...
Provided by University of Calgary
-
Whitepapers
Time-Delay Estimation Applying the Extended Invariance Principle With a Polynomial Rooting Approach
September 2, 2009, 12:00am PDT
This paper treats the problem of joint estimation of time-delay and spatial (Direction-Of-Arrival, DOA) parameters of several replicas of a known signal in an unknown spatially correlated field....
Provided by University of Calgary
-
Whitepapers
A Distributed Protocol for Wireless Sensor Networks Based on Multiple-Leader Stackelberg Network Games
September 12, 2012, 12:00am PDT
While the past literature on game theory rarely addresses the implementation of protocols that converge to Nash equilibria, practical networks must be designed with protocols that correctly...
Provided by University of Calgary
-
Whitepapers
Optimal Motion and Communication for Persistent Information Collection Using a Mobile Robot
September 22, 2012, 12:00am PDT
In this paper, the authors study the problem of persistent information collection using a mobile robot. They consider the scenario where information bits are generated with certain rates at a...
Provided by University of Calgary
-
Whitepapers
Evolving Landscape of Cellular Network Traffic
August 27, 2012, 12:00am PDT
Recent technological advances have resulted in a dramatic change in the market shares of cellular mobile devices. However, little is known about the impact of these changes on the landscape of...
Provided by University of Calgary
-
Whitepapers
Improving the Performance of Cognitive Radios Through Classification, Learning, and Predictive Channel Selection
December 27, 2011, 12:00am PST
Prediction of future idle times of different channels based on history information allows a Cognitive Radio (CR) to select the best channels for control and data transmission. In contrast to...
Provided by University of Calgary
-
Whitepapers
Beyond Secret Handshakes: Affiliation-Hiding Authenticated Key Exchange
January 1, 2013, 12:00am PST
The authors consider a very strong notion of Secret Handshakes, namely Affiliation-Hiding Authenticated Key Exchange protocols (AH-AKE), which guarantee security under arbitrary composition of...
Provided by University of Calgary
-
Whitepapers
Aggregation Queries in the Database-As-a-Service Model
January 1, 2013, 12:00am PST
In the Database-As-a-Service (DAS) model, clients store their database contents at servers belonging to potentially untrusted service providers. To maintain data confidentiality, clients need to...
Provided by University of Calgary
-
Whitepapers
Shadow Chasing Enhancement in Resource Allocation for Heterogeneous Networks
November 21, 2012, 12:00am PST
In this paper, the authors propose an enhancement to a resource allocation scheme known as shadow chasing for interference mitigation in heterogeneous networks composed of Macrocell User...
Provided by University of Calgary
-
Whitepapers
Robust Multicasting in Micro Base Station Aided Wireless Cellular Networks
November 21, 2012, 12:00am PST
Efficient multicasting of critical messages is of essential importance in public safety and commercial multimedia cellular networks. The authors study the effectiveness of using the aid of micro...
Provided by University of Calgary
-
Whitepapers
Simultaneous Information and Energy Transfer: A Two-User MISO Interference Channel Case
November 21, 2012, 12:00am PST
This paper considers the sum rate maximization problem of a two-user multiple-input single-output interference channel with receivers that can scavenge energy from the radio signals transmitted by...
Provided by University of Calgary
-
Whitepapers
Efficient Complex Operators for Irregular Codes
December 12, 2010, 12:00am PST
Complex "Fat operators" are important contributors to the efficiency of specialized hardware. This paper introduces two new techniques for constructing efficient fat operators featuring up to...
Provided by University of Calgary
-
Whitepapers
Linear Programming Based Joint Detection of LDPC Coded MIMO Systems
November 21, 2012, 12:00am PST
Multiple-Input Multiple-Output (MIMO) communication systems can achieve higher throughput by exploiting diversity in multi-antenna wireless communications. Spatial multiplexing schemes attempts to...
Provided by University of Calgary
-
Whitepapers
Making the Internet More Evolvable
October 15, 2012, 12:00am PDT
Why is the Internet so hard to evolve? Some argue that the people require a radically different architecture to enable evolution. To the contrary, they contend that a simple re-engineering of the...
Provided by University of Calgary
-
Whitepapers
Macroscopically Sustainable Networking: An Internet Quine
September 16, 2012, 12:00am PDT
The Internet stands atop an unseen industrial system required for its continued growth, operation, and maintenance. While its scale could not have been achieved without this reliance, its...
Provided by University of Calgary
-
Whitepapers
Spectrum Management in Heterogeneous Bandwidth Networks
November 21, 2012, 12:00am PST
As optical network continues to evolve, lightpaths will take on different spectrum spaces as opposed to current uniform 50-GHz grid. While lightpaths of heterogeneous bandwidths co-exist, two...
Provided by University of Calgary
-
Whitepapers
Cooperative Beamforming in Multiuser MIMO Networks: Fast SINR Fairness Algorithms
November 21, 2012, 12:00am PST
This paper studies efficient signal transmission strategies in a multiuser MIMO network where multiple source nodes form a large virtual MIMO array to perform cooperative beamforming. In order to...
Provided by University of Calgary
-
Whitepapers
Collaborative Energy Debugging for Mobile Devices
September 10, 2012, 12:00am PDT
The authors aim to detect and diagnose code misbehavior that wastes energy, which they call energy bugs. This paper describes a method and implementation, called Carat, for performing such...
Provided by University of Calgary
-
Whitepapers
Towards a Data Analysis Recommendation System
September 10, 2012, 12:00am PDT
System data is abundant, yet data-driven decision making is currently more of an art than a science. Many organizations rely on data analysis for problem detection and diagnosis, but the process...
Provided by University of Calgary
-
Whitepapers
Towards Verifying Android Apps for the Absence of No-Sleep Energy Bugs
September 13, 2012, 12:00am PDT
The Android OS conserves battery life by aggressively turning off components, such as screen and GPS, while allowing application developers to explicitly prevent part of this behavior using the...
Provided by University of Calgary
-
Whitepapers
Accurate Characterization of the Variability in Power Consumption in Modern Mobile Processors
September 13, 2012, 12:00am PDT
The variability in performance and power consumption is slated to grow further with continued scaling of process technologies. While this variability has been studied and modeled before, there is...
Provided by University of Calgary
-
Whitepapers
Tracking Emigrant Data via Transient Provenance
May 23, 2011, 12:00am PDT
Information leaks are a constant worry for companies and government organizations. After a leak occurs it is very important for the data owner to not only determines the extent of the leak, but...
Provided by University of Calgary
-
Whitepapers
Provenance Based Rebuild: Using Data Provenance to Improve Reliability
May 1, 2011, 12:00am PDT
Traditionally, data preservation and reliability have used Error Correcting Codes (ECCs) to ensure data safety. The development of general data provenance tracking systems provides a new...
Provided by University of Calgary
-
Whitepapers
Analysis and Construction of Galois Fields for Efficient Storage Reliability
August 21, 2007, 12:00am PDT
Software-based Galois field implementations are used in the reliability and security components of many storage systems. Unfortunately, multiplication and division operations over Galois fields...
Provided by University of Calgary
-
Whitepapers
POTSHARDS - A Secure, Recoverable, Long-Term Archival Storage System
June 1, 2009, 12:00am PDT
Users are storing ever-increasing amounts of information digitally, driven by many factors including government regulations and the public's desire to digitally record their personal histories....
Provided by University of Calgary
-
Whitepapers
HANDS: A Heuristically Arranged Non-Backup In-Line Deduplication System
March 1, 2012, 12:00am PST
Deduplication on is rarely used on primary storage because of the disk bottleneck problem, which results from the need to keep an index mapping chunks of data to hash values in memory in order to...
Provided by University of Calgary
-
Whitepapers
Analyzing User Behavior: A Trace Analysis of the NCAR Archival Storage System
March 1, 2012, 12:00am PST
As the need for archival storage systems grows it becomes increasingly more important that the authors examine and understand how existing systems operate and are used under real-world conditions....
Provided by University of Calgary
-
Whitepapers
End-to-End Performance Management for Scalable Distributed Storage
April 7, 2008, 12:00am PDT
Many applications - for example, scientific simulation, real-time data acquisition, and distributed reservation systems - have I/O performance requirements, yet most large, distributed storage...
Provided by University of Calgary
-
Whitepapers
Compressing Intermediate Keys Between Mappers and Reducers in SciHadoop
November 6, 2011, 12:00am PDT
In Hadoop mappers send data to reducers in the form of key/value pairs. The default design of Hadoop's process for transmitting this intermediate data can cause a very high overhead, especially...
Provided by University of Calgary
-
Whitepapers
DataMods: Programmable File System Services
November 7, 2012, 12:00am PST
As applications become more complex, and the level of concurrency in systems continue to rise, developers are struggling to scale complex data models on top of a traditional byte stream interface....
Provided by University of Calgary
-
Whitepapers
Increasing Sync Rate of Pulse-Coupled Oscillators Via Phase Response Function Design: Theory and Application to Wireless Networks
September 4, 2012, 12:00am PDT
This paper addresses the synchronization rate of weakly connected Pulse-Coupled Oscillators (PCOs). The authors prove that besides coupling strength, the phase response function is also a...
Provided by University of Calgary
-
Whitepapers
Algorithms for Temperature-Aware Task Scheduling in Microprocessor Systems
January 28, 2008, 12:00am PST
The authors study scheduling problems motivated by recently developed techniques for microprocessor thermal management at the operating systems level. The general scenario can be described as...
Provided by University of Calgary
-
Whitepapers
Efficient Aggregation of Encrypted Data in Wireless Sensor Networks
January 1, 2012, 12:00am PST
Wireless Sensor Networks (WSNs) are ad-hoc networks composed of tiny devices with limited computation and energy capacities. For such devices, data transmission is a very energy-consuming...
Provided by University of Calgary
-
Whitepapers
Stochastic Online Learning for Network Optimization Under Random Unknown Weights
August 9, 2012, 12:00am PDT
The authors consider network optimization problems under random weights with unknown distributions. They first consider the shortest path problem that aims to optimize the quality of communication...
Provided by University of Calgary
-
Whitepapers
On Secure Distributed Data Storage Under Repair Dynamics
May 14, 2010, 12:00am PDT
The authors address the problem of securing distributed storage systems against passive eavesdroppers that can observe a limited number of storage nodes. An important aspect of these systems is...
Provided by University of Calgary
-
Whitepapers
Countering Gattaca: Efficient and Secure Testing of Fully-Sequenced Human Genomes
December 1, 2011, 12:00am PST
Recent advances in DNA sequencing technologies have put ubiquitous availability of fully sequenced human genomes within reach. It is no longer hard to imagine the day when everyone will have the...
Provided by University of Calgary
-
Whitepapers
Limits of Random Oracles in Secure Computation
March 17, 2012, 12:00am PDT
The seminal result of Impagliazzo and Rudich (STOC 1989) gave a black-box separation between one-way functions and public-key encryption: informally, a public-key encryption scheme cannot be...
Provided by University of Calgary
-
Whitepapers
Secure Estimation and Control for Cyber-Physical Systems Under Adversarial Attacks
May 24, 2012, 12:00am PDT
The vast majority of today's critical infrastructure is supported by numerous feedback control loops and an attack on these control loops can have disastrous consequences. This is a major concern...
Provided by University of Calgary
-
Whitepapers
Social Norm Incentives for Secure Network Coding in MANETs
May 16, 2012, 12:00am PDT
The throughput of mobile ad hoc networks subject to disruption, loss and interference can be significantly improved with the use of network coding. However, network coding implies extra work for...
Provided by University of Calgary
-
Whitepapers
Resource Centric Security to Protect Customer Energy Information in the Smart Grid
August 24, 2012, 12:00am PDT
From the customer domain perspective, interoperation implies that external systems are able to control customer's energy resources as well as to read energy-related information. These two types of...
Provided by University of Calgary
-
Whitepapers
Multiuser Communications Using Beam-Tilting Antennas
March 12, 2012, 12:00am PDT
This paper proposes means to exploit the additional degrees of freedom that can be achieved by using beam-tilting antennas for the purposes of multiuser communication without substantially...
Provided by University of Calgary
-
Whitepapers
Practical Energy Efficient Link Adaptation for MIMO-OFDM Systems
March 12, 2012, 12:00am PDT
The authors present a practical link adaptation algorithm for MIMO-OFDM systems. The proposed solution is based on sounding the channel periodically and choosing the optimal mode that will...
Provided by University of Calgary
-
Whitepapers
UAV-Aided Cross-Layer Routing for MANETs
March 12, 2012, 12:00am PDT
In this paper, the authors present UAV-aided Cross-Layer Routing Protocol (UCLR) that aims at improving the routing performance of a ground MANET network with aid from an Unmanned Aerial Vehicle...
Provided by University of Calgary
-
Whitepapers
Using Game Theory and Bayesian Networks to Optimize Cooperation in Ad-Hoc Wireless Networks
May 24, 2012, 12:00am PDT
Infrastructure sharing has been recently investigated as a viable solution to increase the performance of coexisting wireless networks. In this paper, the authors analyze a scenario where two...
Provided by University of Calgary
-
Whitepapers
Adaptive Precoding for Femtocell Interference Mitigation
May 24, 2012, 12:00am PDT
In this paper, the authors study interference mitigation in cellular networks with femtocells. They propose to use adaptive distributed beamforming to mitigate downlink interference between...
Provided by University of Calgary
-
Whitepapers
Energy-Efficient Dynamic Provisioning for Spectrum Elastic Optical Networks
May 24, 2012, 12:00am PDT
Spectrum elastic optical networks support flexible central frequency and spectrum assignment for lightpaths. In this paper, the authors investigate energy-efficient dynamic provisioning for such...
Provided by University of Calgary
-
Whitepapers
Heterogeneous Partial Feedback Design in Heterogeneous OFDMA Cellular Networks
May 24, 2012, 12:00am PDT
Modern heterogeneous networks have an inherent heterogeneous structure such as user densities and large scale channel effects that motivates this work on heterogeneous partial feedback design. In...
Provided by University of Calgary
-
Whitepapers
Analysis of a MIMO OFDMA Heterogeneous Feedback System Employing Joint Scheduling and Spatial Diversity in Nakagami Fading Channels
May 24, 2012, 12:00am PDT
The authors present a unified analytical framework to jointly examine spatial, spectral, and multiuser diversity in a general multiuser MIMO OFDMA system. Spectral diversity originates from...
Provided by University of Calgary
-
Whitepapers
Wireless Network Aware Cloud Scheduler for Scalable Cloud Mobile Gaming
May 24, 2012, 12:00am PDT
Cloud Mobile Gaming (CMG) has been proposed as an approach to enable rich Internet games on mobile devices, where the rendering of the games is performed on cloud servers, as opposed to on mobile...
Provided by University of Calgary
-
Whitepapers
Global Motion Compensation and Spectral Entropy Bit Allocation for Low Complexity Video Coding
May 24, 2012, 12:00am PDT
Most standard video compression schemes such as H.264/AVC involve a high complexity encoder with block Motion Estimation (ME) engine. However, applications such as video reconnaissance and...
Provided by University of Calgary
-
Whitepapers
Cyclostationarity-Based Low Complexity Wideband Spectrum Sensing Using Compressive Sampling
May 24, 2012, 12:00am PDT
Detecting the presence of licensed users and avoiding interference to them is vital to the proper operation of a Cognitive Radio (CR) network. Operating in a wideband channel requires high Nyquist...
Provided by University of Calgary
-
Whitepapers
Protograph-Based Raptor-Like LDPC Codes With Low Thresholds
May 24, 2012, 12:00am PDT
This paper presents a new construction of Punctured-Node Protograph-Based Raptor-Like (PN-PBRL) codes that is suitable for long-blocklength applications. As with the Raptor codes, additional...
Provided by University of Calgary
-
Whitepapers
Coded Path Protection: Efficient Conversion of Sharing to Coding
May 24, 2012, 12:00am PDT
Link failures in wide area networks are common and cause significant data losses. Mesh-based protection schemes offer high capacity efficiency but they are slow and require complex signaling....
Provided by University of Calgary
-
Whitepapers
Outage Performance for Amplify-and-Forward Channels With an Unauthenticated Relay
May 24, 2012, 12:00am PDT
The authors investigate a relay network where the source can potentially utilize an unauthenticated Amplify-and-Forward (AF) relay to augment its direct transmission of a confidential message to...
Provided by University of Calgary
-
Whitepapers
Bit-Interleaved Coded Multiple Beamforming With Perfect Coding
May 24, 2012, 12:00am PDT
When Channel State Information (CSI) is available at both the transmitter and the receiver, beamforming techniques exploiting Singular Value Decomposition (SVD) are applied in a Multiple-Input...
Provided by University of Calgary
-
Whitepapers
Combination Weights for Diffusion Strategies With Imperfect Information Exchange
May 24, 2012, 12:00am PDT
Adaptive networks rely on in-network and collaborative processing among distributed agents to deliver enhanced performance in estimation and inference tasks. Information is exchanged among the...
Provided by University of Calgary
-
Whitepapers
Distributed Throughput Optimization Over P2P Mesh Networks Using Diffusion Adaptation
May 24, 2012, 12:00am PDT
This work develops a decentralized adaptive strategy for throughput maximization over Peer-To-Peer (P2P) networks. The adaptive strategy can cope with changing network topologies, is robust to...
Provided by University of Calgary
Keep Up with TechRepublic
Submit a Paper
Get your content listed in our directory!
Our directory is the largest library of vendor-supplied technical content on the Web. It’s also the first place IT decision makers turn to when researching technology solutions. Our members are already finding your competitors’ papers here - shouldn’t they find yours, too? It's FREE so click here and submit your white paper, case study, data sheet, research report, or other document today!
