that is, as a set of coupled, first-order differential equations. The solution proceeds in two steps; first the state-variable response x(t) is found by solving the set of first-order state equations, Eq. (1), and then the state response is substituted into the algebraic output equations, Eq. (2) in order to compute y(t). As in the classical solution method for ordinary differential equations w...

A theory admits generalized conformal structure if the only scale in the quantum theory is set by a dimensionful coupling. SYK is an example of a theory with generalized conformal structure and in this paper we investigate the consequences of this structure for correlation functions and for the holographic realization of SYK. The Ward identities associated with the generalized conformal structu...

A new fingerprint recognition approach based on features extracted from the wavelet domain is presented. The 64-subband structure proposed by the FBI WSQ standard is used to decompose the frequency of the image. The efficiency of the method is achieved by using the k-nearest neighbor (k-NN) classifier. The result is compared with other image-based methods. For compressed fingerprint images, thi...

In this paper we show that cache memories for embedded applications can be designed to both increase performance and reduce energy consumed. We show that using separate (data) caches for indexed or stream data and scalar data items can lead to substantial improvements in terms of cache misses. The sizes of the various cache structure should be customized to meet applications’ needs. We show tha...

In the heavy quark limit, the heavy baryon LQ (Q5b or c) can be regarded as composed of a heavy quark and a scalar light diquark which has good spin and flavor quantum numbers. Based on this picture we establish the Bethe-Salpeter ~BS! equation for LQ in the leading order of 1/mQ expansion. With the kernel containing both the scalar confinement and one-gluon-exchange terms we solve the BS equat...

The recent development of multimedia applications made them one of the most popular and most demanding types of workloads. To meet the new requirements and to map all new multimedia functionality onto systems with restricted resources a dramatical need of visual data compression standards arose. This paper discusses the performance requirements of the MPEG standards and outlines some approaches...

We describe a systematic methodology for generating performance test cases for current generation microprocessors. Such test cases are used for: (a) validating the expected pipeline flow behavior and timing; and, (b) detecting and diagnosing performance bugs in the design. We cite examples of application to a real, superscalar processor in pre– and post–silicon stages of development. Suggested ...

In this paper we present an FPGA implementation of a highspeed elliptic curve scalar multiplier for binary finite fields. High speeds are achieved by boosting the operating clock frequency while at the same time reducing the number of clock cycles required to do a scalar multiplication. To increase clock frequency, the design uses optimized implementations of the underlying field primitives and...

We consider the photon field between an unusual configuration of infinite parallel plates: a perfectly conducting plate (ǫ → ∞) and an infinitely permeable one μ → ∞). After quantizing the vector potential in the Coulomb gauge, we obtain explicit expressions for the vacuum expectation values of field operators of the form < ÊiÊj >0 and < B̂iB̂j >0. These field correlators allow us to reobtain the...

The sparse matrix-vector product is an important computational kernel that runs ineffectively on many computers with super-scalar RISC processors. In this paper we analyse the performance of the sparse matrix-vector product with symmetric matrices originating from the FEM and describe techniques that lead to a fast implementation. It is shown how these optimisations can be incorporated into an ...