OBJECTIVE We developed a protocol for inducing moderate psychologic stress in a functional imaging setting and evaluated the effects of stress on physiology and brain activation. METHODS The Montreal Imaging Stress Task (MIST), derived from the Trier Mental Challenge Test, consists of a series of computerized mental arithmetic challenges, along with social evaluative threat components that ar...

An often overlooked way to increase the efficiency of HPC on FPGA is to tailor, as tightly as possible, the arithmetic to the application. An ideally efficient implementation would, for each of its operations, toggle and transmit just the number of bits required by the application at this point. Conventional microprocessors, with their word-level granularity and fixed memory hierarchy, keep us ...

Interval arithmetic is a method for performing computations on measurements that are only known to within a xed error range. As the measurements are combined mathematically, their error intervals are also combined, in a conservative fashion. While the technique of interval analysis has found uses in many areas of computing in recent years, it has not yet been applied heavily in computer vision....

Current techniques for formally verifying circuits implemented in Galois field (GF ) arithmetic are limited to those with a known irreducible polynomial P (x). This paper presents a computer algebra based technique that extracts the irreducible polynomial P (x) used in the implementation of a multiplier in GF(2). The method is based on first extracting a unique polynomial in Galois field of eac...

511mmury Some logical aspects of a digital computer for a space vehicle ;ire de3cribed. and the evolution of its logical design is traced. The intended ;rpplir:ution and the characteristics of the computer's ancestry fornl a frame-\vork for the design, which is filled in by accumulation of the many decisions made by its designers. This paper deals with the choice of word length, number system. ...

Prime field arithmetic plays a central role in computer algebra and supports computation in Galois fields which are essential to coding theory and cryptography algorithms. The prime fields that are used in computer algebra systems, in particular in the implementation of modular methods, are often of small characteristic, that is, based on prime numbers that fit on a machine word. Increasing pre...

The recursive doubling algorithm as developed by Stone can be used to solve a tridiagonal linear system of size n on a parallel computer with n processors using O ( log n ) parallel arithmetic steps. In this paper, we give a limited processor version of the recursive doubling algorithm for the solution of tridiagonal linear systems using O ( n p + log p ) parallel arithmetic steps on a parallel...

Abstract In recent decades, several Russian schools have been implementing a world-unique education program of mathematics for elementary schools. it, the landscape school arithmetic is radically expanded due to basic objects modern and computer science. These their operations are visual, making them much more comprehensible than traditional arithmetic. The range activities also expands to, exa...