Ultra-lightweight Thread (uThread) is a library package designed and optimized for user-level management of parallelism in a single application program running on distributed memory computers. Existing process management systems incur an unnecessarily high cost when used for the type of parallelism exploited within an application. By reducing the overhead of ownership protection and frequent co...

The paper discusses algorithms and programs for electron density averaging using a distributed memory MIMD system. Electron density averaging is a computationally intensive step needed for phase refinement and extension in the computation of the 3-D structure of macromolecules like proteins and viruses. The determination of a single structure may require thousands of hours of CPU time for tradi...

Warranted or otherwise, until 2016, the U.K. government had a reputation for stability, competence, and reliability that was grounded on normative guardrails, which prevented extremism overreaction. Moreover, people were stereotyped (rightly otherwise) as fair, honest, stoic, if rather quaint bit dull, but (supporters of national soccer team aside) at least it could be assumed they would “act l...

This paper describes several algorithms to perform all-to-all communication on a two-dimensional mesh connected computer with wormhole routing. We discuss both direct algorithms, in which data is sent directly from source to destination processor, and indirect algorithms in which data is sent through one or more intermediate processors. We propose algorithms for both power-of-two and non power-...

Using natural language to write programs is a touchstone problem for computational linguistics. We present an approach that learns to map natural-language descriptions of simple “if-then” rules to executable code. By training and testing on a large corpus of naturally-occurring programs (called “recipes”) and their natural language descriptions, we demonstrate the ability to effectively map lan...

perfectly different, and, in his present paper, unexplained causation. We venture to think that the reasons advanced by him in favor of this theory are insufficient, and the so-called facta in many cases inaccurate when tested by the touchstone of actual experience. Before replying in detail to the arguments brought forward by Dr. O'Connell we desire to draw attention to the extremely valuable ...

Document-based Question Answering aims to compute the similarity or relevance between two texts: question and answer. It is a typical and core task and considered as a touchstone of natural language understanding. In this article, we present a convolutional neural network based architecture to learn feature representations of each questionanswer pair and compute its match score. By taking the i...

We propose an architecture-independent parallel model, the C 3-model. The C 3-model evaluates, for a given parallel algorithm and target architecture, the complexity of computation, the pattern of communication , and the potential congestion arising in communication operations. A metric for estimating the eeect of link and processor congestion on the performance of an arbitrary communication op...

This paper describes the Parallel Universal Matrix Multiplication Algorithms (PUMMA) on distributed memory concurrent computers. The PIJhlMA package includes not only the non-transposed matrix multiplication routine C = A . B. but also transposed multiplication routines C = AT . B, C = A . BT, and C = AT . BT, for a block scattered data distribution. The routines perform efficiently for a wide ...

It used to be that the touchstone of objectivity was elimination subjective features, like our values, biases, assumptions, and so on. Part what motivates this narrow conception is thought objective reality way it regardless relationship it, ability accurately describe or depict distorted by relationship. But if understanding wrong, removing these features takes us farther away from truth knowl...