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Association for Computing Machinery
(6297 results)-
Whitepapers
Warding Off the Dangers of Data Corruption With Amulet
June 16, 2011, 12:00am PDT
Occasional corruption of stored data is an unfortunate byproduct of the complexity of modern systems. Hardware errors, software bugs, and mistakes by human administrators can corrupt important...
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Query Optimization Techniques for Partitioned Tables
June 16, 2011, 12:00am PDT
Table partitioning splits a table into smaller parts that can be accessed, stored, and maintained independent of one another. From their traditional use in improving query performance,...
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Predicting Completion Times of Batch Query Workloads Using Interaction-Aware Models and Simulation
March 24, 2011, 12:00am PDT
A question that DataBase Administrators (DBAs) routinely need to answer is how long a batch query workload will take to complete. This question arises, for example, while planning the execution of...
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Query Processing of Massive Trajectory Data Based on MapReduce
November 2, 2009, 12:00am PST
With the development of positioning technologies and the boosting deployment of inexpensive location-aware sensors, large volumes of trajectory data have emerged. However, efficient and scalable...
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Whitepapers
Hybrid Multi-Channel Multi-Hop MAC in VANETs
November 10, 2010, 12:00am PST
In this paper, the authors propose a Hybrid Multi-Channel Multi-hop Medium Access Control (HMM-MAC) meeting the safety and non-safety requirements in Vehicular Ad-hoc Networks when no...
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Whitepapers
Preserving Privacy on the Searchable Internet
December 7, 2011, 12:00am PST
The Web is the largest repository of information. Personal information is usually scattered on various pages of different websites. Search engines have made it easier to find personal information....
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Efficient Processing of Data Warehousing Queries in a Split Execution Environment
June 16, 2011, 12:00am PDT
Hadapt is a start-up company currently commercializing the Yale University research project called HadoopDB. The company focuses on building a platform for Big Data analytics in the cloud by...
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Whitepapers
Low Overhead Concurrency Control for Partitioned Main Memory Databases
June 11, 2010, 12:00am PDT
Database partitioning is a technique for improving the performance of distributed OLTP databases, since "Single partition" transactions that access data on one partition do not need coordination...
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White Papers
Multi-Dimensional Search for Personal Information Management Systems
December 20, 2007, 12:00am PST
In recent years, market has seen a growth in the amount of semi-structured data users access and store in personal information management systems. This has necessitated the need to develop complex...
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Undercover: Authentication Usable in Front of Prying Eyes
November 1, 2008, 12:00am PDT
A large number of security attacks and scams have occurred in the recent times due to the ability of the criminal to monitor user behaviors. Observation attacks include social engineering attacks...
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Language Constructs for Context-Oriented Programming
May 10, 2008, 12:00am PDT
ContextL is an extension to the Common Lisp Object System that allows for Context-oriented Programming. It provides means to link partial class and method definitions with layers and to activate...
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White Papers
Photo-Based Authentication Using Social Networks
December 7, 2009, 12:00am PST
Lineup, a system that uses the social network graph in Facebook and auxiliary information has underlying mechanism leverages with the concept of CAPTCHAs, programs that are designed to distinguish...
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ODBIS: Towards a Platform for On-Demand Business Intelligence Services
March 26, 2010, 12:00am PDT
Off late, Software-as-a-Service (SaaS) is gaining momentum with more and more successful adoptions. Several companies including some well known names have embraced this new model for software...
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Scientific Computing Using Virtual High-Performance Computing: A Case Study Using the Amazon Elastic Computing Cloud
August 29, 2008, 12:00am PDT
High-performance computing systems are important in scientific computing. Clusters of computer systems - which range greatly in size - are a common architecture for high-performance computing....
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Integrated System Models for Reliable Petascale Storage Systems
November 16, 2007, 12:00am PST
The big challenges facing petascale storage systems are not actually those of performance or traditional fault tolerance schemes, but instead the challenges stem from the inherent complexity of...
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On Calibrating Enterprise Switch Measurements
November 6, 2009, 12:00am PST
The complexity of modern enterprise networks is ever-increasing, and one's understanding of these important networks is not keeping pace. The insight into intra-subnet traffic (staying within a...
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A Policy-Aware Switching Layer for Data Centers
August 22, 2008, 12:00am PDT
Data centers deploy a variety of middleboxes (e.g., firewalls, load balancers and SSL offloaders) to protect, manage and improve the performance of applications and services they run. Since...
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An Architecture for Network Management
December 1, 2009, 12:00am PST
As is becoming increasingly understood, in extending the Internet architecture into the future, network management is a key challenge. The current approach has been to provide a set of weakly...
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Aqua-Net: An Underwater Sensor Network Architecture - Design and Implementation
February 20, 2009, 12:00am PST
Underwater Sensor Network (UWSN) has emerged as a powerful technique for aquatic applications. Different from ground based networks, UWSN features long propagation delay, low bandwidth and high...
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Practical Declarative Network Management
August 21, 2009, 12:00am PDT
The paper presents Flow-based Management Language (FML), a declarative policy language for managing the configuration of enterprise networks. FML was designed to replace the many disparate...
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White Papers
Acoustic Sensor Network Design for Position Estimation
September 1, 2008, 12:00am PDT
In this paper, authors develop tractable mathematical models and approximate solution algorithms for a class of integer optimization problems with probabilistic and deterministic constraints, with...
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Application-Based TCP Hijacking
March 27, 2009, 12:00am PDT
The authors present application-based TCP hijacking (ABTH), a new attack on TCP applications that exploits flaws due to the interplay between TCP and application protocols to inject data into an...
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A Network-Aware MAC and Routing Protocol for Effective Load Balancing in Ad Hoc Wireless Networks With Directional Antenna
January 1, 2010, 12:00am PST
Use of directional antenna in the context of ad hoc wireless networks can largely reduce radio interference, thereby improving the utilization of wireless medium. The major contribution in this...
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An Extensible Software Framework for Building Vehicle to Vehicle Applications
July 2, 2010, 12:00am PDT
Artificial intelligence and wireless technologies have progressed rapidly in the last decade driven by technology evolution and new emerging applications. The automotive industry has the...
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Whitepapers
ARP Spoofing: A Comparative Study for Education Purposes
February 2, 2011, 12:00am PST
ARP spoofing attack, one of the most important security topics, is usually taught in courses such as Intrusion Detection in Local Area Networks (LANs). In such a course, hands-on labs are very...
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On Fault Tolerant Ad Hoc Network Design
June 24, 2009, 12:00am PDT
Minimal configuration and quick deployment of ad hoc networks make it suitable for numerous applications such as emergency situations, border monitoring, and military missions, etc. For such ad...
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An Adaptive and Composite Spatio-Temporal Data Compression Approach for Wireless Sensor Networks
November 4, 2011, 12:00am PDT
Wireless Sensor Networks (WSN) are often deployed to sample the desired environmental attributes and deliver the acquired samples to the sink for processing, analysis or simulations as per the...
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Whitepapers
Monitor Petri Nets for Security Monitoring
September 14, 2010, 12:00am PDT
In the authors' integrated model-based development process for security monitors, they use Live Sequence Charts (LSCs) as expressive, formal specification. Generating target specific monitors from...
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Whitepapers
Eventually Linearizable Shared Objects
July 28, 2010, 12:00am PDT
Shared objects are a useful abstraction in the design of concurrent systems. A concurrent system consists of a collection of sequential processes communicating through shared objects. A shared...
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Whitepapers
Minimizing Private Data Disclosures in the Smart Grid
August 3, 2012, 12:00am PDT
Smart electric meters pose a substantial threat to the privacy of individuals in their own homes. Combined with non-intrusive load monitors, smart meter data can reveal precise home appliance...
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Whitepapers
Similarity Content Search in Content Centric Networks
October 29, 2010, 12:00am PDT
Content searching and downloading are the two dominant actions of the Internet users today, despite the fact that the Internet was not originally architected to serve such actions. Content Centric...
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Whitepapers
3D Reconstruction of Indoor and Outdoor Building Scenes From a Single Image
October 29, 2010, 12:00am PDT
In this paper, a novel method is proposed able to automatically generate accurate 3D models of both outdoor buildings and indoor scenes with perspective cues from line segments that are...
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HaVOC: A Hybrid Memory-Aware Virtualization Layer for On-Chip Distributed ScratchPad and Non-Volatile Memories
June 7, 2012, 12:00am PDT
Hybrid on-chip memories that combine Non-Volatile Memories (NVMs) with SRAMs promise to mitigate the increasing leakage power of traditional on-chip SRAMs. The authors present HaVOC: a run-time...
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Whitepapers
Verifying GPU Kernels by Test Amplification
June 16, 2012, 12:00am PDT
The authors present a novel technique for verifying properties of data parallel GPU programs via test amplification. The key insight behind their work is that they can use the technique of static...
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Whitepapers
Taming Wildcards in Java's Type System
June 8, 2011, 12:00am PDT
Wildcards have become an important part of Java's type system since their introduction 7 years ago. Yet there are still many open problems with Java's wildcards. For example, there are no known...
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Providing Safe, User Space Access to Fast, Solid State Disks
March 7, 2012, 12:00am PST
Emerging fast, non-volatile memories (e.g., phase change memories, spin-torque MRAMs, and the memristor) reduce storage access latencies by an order of magnitude compared to state-of-the-art...
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Whitepapers
On Software Design for Stochastic Processors
June 7, 2012, 12:00am PDT
Much recent research suggests significant power and energy benefits of relaxing correctness constraints in future processors. Such processors with relaxed constraints have often been referred to...
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Whitepapers
Stochastic Computing: Embracing Errors in Architecture and Design of Processors and Applications
October 14, 2011, 12:00am PDT
As device sizes shrink, device-level manufacturing challenges have led to increased variability in physical circuit characteristics. Exponentially increasing circuit density has not only brought...
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Scalable Simulation of Complex Network Routing Policies
May 19, 2010, 12:00am PDT
Modern routing protocols for the internet implement complex policies that take more into account than just path length. However, current routing protocol simulators are limited to either working...
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Debugging Standard Document Formats
April 30, 2010, 12:00am PDT
The paper presents a tool for helping XML schema designers to obtain a high quality level for their specifications. The tool allows one to analyze relations between classes of XML documents and...
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Whitepapers
Advanced and Versatile Real-Time Emulation Platform for Heterogeneous Radio Access Systems
October 31, 2008, 12:00am PDT
This paper is aimed at showing the capabilities of the real-time testbed for all-IP beyond 3G heterogeneous wireless networks that has been developed in the framework of the European IST AROMA...
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Real-Time Evaluation of Radio Access Technology Selection Policies in Heterogeneous Wireless Systems: The AROMA Testbed Approach
October 31, 2008, 12:00am PDT
This paper presents and describes the real-time testbed for all-IP Beyond 3G heterogeneous wireless networks that has been developed in the framework of the European IST AROMA project. The main...
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Real-Time HSPA Emulator for End-to-Edge QoS Evaluation in All-IP Beyond 3G Heterogeneous Wireless Networks
March 3, 2008, 12:00am PST
This paper is aimed at presenting the real-time High Speed Packet Access (HSPA) emulator that has been developed in the framework of the AROMA project. Real-time emulators allow reproducing...
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Whitepapers
Tahoe - The Least-Authority Filesystem
October 31, 2008, 12:00am PDT
Tahoe is a storage grid designed to provide secure, long-term storage, such as for backup applications. It consists of userspace processes running on commodity PC hardware and communicating with...
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Proofs of Retrievability with Public Verifiability and Constant Communication Cost in Cloud
December 13, 2012, 12:00am PST
For data storage outsourcing services, it is important to allow data owners to efficiently and securely verify that the storage sever stores their data correctly. To address this issue, several...
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Comparing Apples and Oranges? Trends in IVC Simulations
June 25, 2012, 12:00am PDT
Looking back at recent years in Inter-Vehicle Communication (IVC) research, tremendous improvements in precision and realism of simulation models concerning all its aspects can be observed. These...
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Whitepapers
BotFinder: Finding Bots in Network Traffic Without Deep Packet Inspection
December 13, 2012, 12:00am PST
Bots are the root cause of many security problems on the Internet, as they send spam, steal information from infected machines, and perform distributed denial-of-service attacks. Many approaches...
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Coexist: Integrating Content Oriented Publish/Subscribe Systems With IP
October 30, 2012, 12:00am PDT
Content-Centric Networking (CCN) seeks to meet the content-centric needs of users. In this paper, the authors propose hybrid-COPSS, a hybrid content-centric architecture. They build on the...
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Efficiently Identifying Working Sets in Block I/O Streams
June 1, 2011, 12:00am PDT
Identifying groups of blocks that tend to be read or written together in a given environment is the first step towards powerful techniques for device failure isolation and power management. For...
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Understanding Data Survivability in Archival Storage Systems
June 6, 2012, 12:00am PDT
Preserving data for a long period of time in the face of faults, large and small, is crucial for designing reliable archival storage systems. However, the survivability of data is different from...
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MusicScore: Mobile Music Composition for Practice and Fun
November 2, 2012, 12:00am PDT
In this paper, the authors present their design of MusicScore, a professional grade application on the iOS platform for music composition and live performance tracking, used by composers and...
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Cloud-based Social Application Deployment using Local Processing and Global Distribution
December 13, 2012, 12:00am PST
Social applications represent a paradigm shift on how the Internet is to be used, and have already changed the way users work, live, and play. When it comes to deploying social applications, cloud...
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Whitepapers
Scalable Locking and Recovery for Network File Systems
November 16, 2007, 12:00am PST
Petascale computing systems pose serious scalability challenges for any data storage system. Lustre is a scalable, secure, robust, highly-available cluster file system that has been successfully...
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Data Layout Optimization for Petascale File Systems
November 15, 2009, 12:00am PST
High-Performance Computing (HPC) has crossed the Petaflop mark and is moving forward to reach the Exaflop range. However, while computing resources are making rapid progress, there is a...
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pNFS, POSIX, and MPI-IO: A Tale of Three Semantics
November 15, 2009, 12:00am PST
Advanced research collaborations push the bounds of modern technology, but continue to be constrained by rigid computing and storage infrastructures. Many large compute clusters are tightly...
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Scalable I/O Tracing and Analysis
November 15, 2009, 12:00am PST
As supercomputer performance approached and then surpassed the petaflop level, I/O performance has become a major performance bottleneck for many scientific applications. Several tools exist to...
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Uncovering Errors: The Cost of Detecting Silent Data Corruption
November 15, 2009, 12:00am PST
Data integrity is pivotal to the usefulness of any storage system. It ensures that the data stored is free from any modification throughout its existence on the storage medium. Hash functions such...
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Using the Active Storage Fabrics Model to Address Petascale Storage Challenges
November 15, 2009, 12:00am PST
The authors present the Active Storage Fabrics (ASF) model for storage embedded parallel processing as a way to address petascale data intensive challenges. ASF is aimed at emerging scalable...
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Extending Scalability of Collective IO Through Nessie and Staging
November 13, 2011, 12:00am PST
The increasing fidelity of scientific simulations as they scale towards exascale sizes is straining the proven IO techniques championed throughout terascale computing. Chief among the successful...
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In-Situ I/O Processing: A Case for Location Flexibility
November 13, 2011, 12:00am PST
Increasingly severe I/O bottlenecks on High-End Computing machines are prompting scientists to process output data during simulation time, "in-situ", and before placing data on disks. This paper...
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Power Use of Disk Subsystems in Supercomputers
November 13, 2011, 12:00am PST
Exascale will present many challenges to the HPC community, but the primary problem will likely be power consumption. Current petascale systems already use a significant fraction of the power that...
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Robust Benchmarking for Archival Storage Tiers
November 13, 2011, 12:00am PST
Until recently, archival storage tiers have consisted of tape-based devices with a large storage capacity, but limited I/O performance for data retrieval. However, the growing capacity and...
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Performance Prediction for Concurrent Database Workloads
June 16, 2011, 12:00am PDT
Current trends in data management systems, such as cloud and multi-tenant databases are leading to data processing environments that concurrently execute heterogeneous query workloads. At the same...
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C-MR: Continuously Executing MapReduce Workflows on Multi-Core Processors
June 18, 2012, 12:00am PDT
The widespread appeal of MapReduce is due, in part, to its simple programming model. Programmers provide only application logic while the MapReduce framework handles the logistics of data...
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Optimizing Index Deployment Order for Evolving OLAP
February 1, 2012, 12:00am PST
Many database applications deploy hundreds or thousands of indexes to speed up query execution. First, real-world businesses often require online index deployment, and the traditional off-line...
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Skew-Aware Automatic Database Partitioning in Shared-Nothing, Parallel OLTP Systems
May 24, 2012, 12:00am PDT
The advent of affordable, shared-nothing computing systems portends a new class of parallel DataBase Management Systems (DBMS) for On-Line Transaction Processing (OLTP) applications that scale...
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Managing Parallelism for Stream Processing in the Cloud
April 10, 2012, 12:00am PDT
Stream processing applications run continuously and have varying load. Cloud infrastructures present an attractive option to meet these fluctuating computational demands. Coordinating such...
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Using Kerberized Lustre over the WAN for High Energy Physics Data
July 20, 2012, 12:00am PDT
This paper reports the design and implementation of a secure, wide area network, distributed filesystem by the ExTENCI project (Extending science Through Enhanced National Cyber Infrastructure)...
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Receipt-Mode Trust Negotiation: Efficient Authorization Through Outsourced Interactions
December 28, 2010, 12:00am PST
In trust negotiation approaches to authorization, previously unacquainted entities establish trust in one another gradually via the bilateral and iterative exchange of policies and digital...
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Temporal Quality Assessment for Mobile Videos
August 26, 2012, 12:00am PDT
Video quality assessment in mobile devices, for instances smart phones and tablets, raises unique challenges such as unavailability of original videos, the limited computation power of mobile...
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A Routing Architecture for Scheduled Dynamic Circuit Services
November 30, 2010, 12:00am PST
A wide range of applications in the nascent field of cloud computing and in other fields require stable, low-delay wide-area connectivity together with capabilities of co-scheduling network and...
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Influence of Spatial Statistics of Spectrum Use on the Performance of Cognitive Wireless Networks
October 25, 2012, 12:00am PDT
The authors study the performance characteristics of cognitive wireless networks under different dynamic spectrum access scenarios. Their focus is especially on the influence of spatial structures...
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Cloud-Based Push-Styled Mobile Botnets: A Case Study of Exploiting the Cloud to Device Messaging Service
December 7, 2012, 12:00am PST
Given the popularity of Smartphones and mobile devices, mobile botnets are becoming an emerging threat to users and network operators. The authors propose a new form of cloud-based push-styled...
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Characterization of 3G Control-Plane Signaling Overhead From a Data-Plane Perspective
October 25, 2012, 12:00am PDT
In 3G networks, when user applications of mobile subscribers send or receive data-plane traffic, control-plane signaling messages will be triggered to initiate or release radio resources for the...
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Agile and Pro-Active Public Administration as a Collaborative Networked Organization
October 28, 2010, 12:00am PDT
In highly competitive, globalized economies and societies of always-on-line people intensively using the Internet and mobile phones, public administrations have to adapt to new challenges....
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On Optimum Left-to-Right Strategies for Active Context-Free Games
December 14, 2012, 12:00am PST
Active context-free games are two-player games on strings over finite alphabets with one player trying to rewrite the input string to match a target specification. These games have been...
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A Case for Evaluating Backpressure Routing Using Ns-3 Emulation in a WiFi Mesh Testbed
August 22, 2012, 12:00am PDT
Rapid prototyping of wireless network protocols is a recurring problem faced by experimental researchers. This feature is one of the biggest assets of the ns-3 emulation functionality. This paper...
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A Lightweight and Accurate Link Abstraction Model for the Simulation of LTE Networks in ns-3
October 25, 2012, 12:00am PDT
In this paper, the authors present a link abstraction model for the simulation of downlink data transmission in LTE networks. The purpose of this model is to provide an accurate link performance...
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Benefits and Limitations of Spatial Reuse in Wireless Mesh Networks
October 26, 2007, 12:00am PDT
Local area wireless networks are based on the cell topology: clients associate to one of several access points, which are connected using a wired backbone. As high data rates are only available...
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MAClets: Active MAC Protocols Over Hard-Coded Devices
December 13, 2012, 12:00am PST
The authors introduce MAClets; software programs uploaded and executed on-demand over wireless cards, and devised to change the card's real-time medium access control operation. MAClets permit...
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