Communications of the ACM
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From Communications of the ACM
Spreadsheet Data Manipulation Using Examples
Millions of computer end users need to perform tasks over large spreadsheet data, yet lack the programming knowledge to do such tasks automatically. We present...
From Communications of the ACM
Technical Perspective: Best Algorithms + Best Computers = Powerful Match
Say you want to simulate the motion over time of the stars in a galaxy to learn about how galaxies formed and why the universe appears as it does. Is it feasible...
From Communications of the ACM
A Massively Parallel Adaptive Fast Multipole Method on Heterogeneous Architectures
We describe a parallel fast multipole method for highly nonuniform distributions of particles. We employ both distributed memory parallelism and shared memory parallelism...
From Communications of the ACM
Asynchronous Contact Mechanics
Physicists have long observed physical phenomena and developed mathematical models to describe them. The advent of computers has allowed us to implement these...
From Communications of the ACM
Technical Perspective: Building Robust Dynamical Simulation Systems
Computational power has been widely used to predict the behavior of dynamical systems using computer simulations, which are often used as an adjunct to or substitute...
From Communications of the ACM
The Grand Challenge of Computer Go: Monte Carlo Tree Search and Extensions
The ancient oriental game of Go has long been considered a grand challenge for artificial intelligence. However, computer Go programs based on Monte-Carlo tree...
From Communications of the ACM
Technical Perspective: A New Way to Search Game Trees
Researchers in artificial intelligence know that computers still lag far behind human levels of play in many games of strategy. One such contest of wits is Go...
From Communications of the ACM
Technical Perspective: The Benefits of Capability-Based Protection
Affordable personal computing hardware and the usable GUI-based PC operating systems made the vision of "a computer on every desktop and in every home" a reality...
From Communications of the ACM
A Taste of Capsicum: Practical Capabilities For Unix
Capsicum is a lightweight operating system capability and sandbox framework planned for inclusion in FreeBSD 9. Capsicum extends, rather than replaces, UNIX APIs...
From Communications of the ACM
Technical Perspective: Where Do People Draw Lines?
Computer graphics once focused exclusively on realism. The field eventually broadened to include other pictorial...
From Communications of the ACM
Where Do People Draw Lines?
This paper presents the results of a study in which artists made line drawings intended to convey specific 3D shapes.
From Communications of the ACM
Wherefore Art Thou R3579X?: Anonymized Social Networks, Hidden Patterns, and Structural Steganography
In a social network, nodes correspond to people or other social entities, and edges correspond to social links between them. We describe a family of attacks such...
From Communications of the ACM
Technical Perspective: A Perfect 'Match'
In a breakthrough contribution, the authors of the paper that follows have developed an efficient way to find approximate nearest neighbors for the case of database...
From Communications of the ACM
The Patchmatch Randomized Matching Algorithm For Image Manipulation
This paper presents a new randomized algorithm for quickly finding approximate nearest neighbor matches between image patches. Our algorithm offers substantial...
From Communications of the ACM
Technical Perspective: Power Efficiency as the #1 Design Constraint
Moore's Law, and associated observations by Bob Dennard, describe key technical...
From Communications of the ACM
Understanding Sources of Ineffciency in General-Purpose Chips
To better understand what improvement in processor efficiency is possible, we quantify the performance and energy overheads of a 720p HD H.264 encoder running on...
From Communications of the ACM
Technical Perspective: A Better Way to Learn Features
A typical machine learning program uses weighted combinations of features to discriminate between classes or to predict...
From Communications of the ACM
Unsupervised Learning of Hierarchical Representations with Convolutional Deep Belief Networks
There has been much interest in unsupervised learning of hierarchical generative models such as deep belief networks (DBNs); however, scaling such models to full...
From Communications of the ACM
Technical Perspective: Visual Reconstruction
Nearly 460,000 Flickr pictures were used to create detailed three-dimensional geometry and colors of famous landmarks and...
From Communications of the ACM