A unique family of high-speed, microprogrammable asyn-chronous controller (MAC) modules is described in this correspondence.Each MAC module consists of two fundamental mode machines thatcommunicate by means of a handshake interface that permits it to bedriven by any programmable logic device including ROM’s. Any statemachine controller design@ with a MAC module will operate ...

Bit faults induced by single-event upsets in instruction may not cause a system to experience an error. The instruction vulnerability factor (IVF) is first defined to quantify the effect of non-effective upsets on program reliability in this paper; and the mean time to failure (MTTF) model of program memory is then derived based on IVF. Further analysis of MTTF model concludes that the MTTF of ...

Adolescence may be defined as the period of life 'rom the end of childhood, and indicated physically by the bodily changes associated with puberty, continuing until full physical development is achieved, and adult status in society is recognised. Unfortunately there is incomplete agreement as to the time-period involved. Some authors (Sandstrom) consider the years from 12-16, the age 10-12 bein...

We argue in favor of the presumed c o m m i t protocol by proposing two new presumed commit variants that sign$cantly reduce the cost of logging activities associated with the original presumed commit protocol. Furthermore, for read-only transactions, we apply our unsolicited updatevote optim’zationand show that the cost associated with this type of transactions is the same in both presumed com...

Introduction. Since the time of Riemann, there has been a close interplay between the study of the geometry of complex algebraic curves (or, equivalently, compact Riemann surfaces) and the topology of 2-manifolds. These connections arise from the uniformization theorem, which asserts that every simply connected Riemann surface is conformally equivalent to either the Riemann sphere, the plane, o...

Dynamic replication can be used to reduce bandwidth consumption and access latency in high performance “data grids” where users require remote access to large files. Different replication strategies can be defined depending on when, where, and how replicas are created and destroyed. We describe a simulation framework that we have developed to enable comparative studies of alternative dynamic re...

abstract introduction: this study was aimed at assessing the effect of a new thoracolumbar orthosis on patients with scheuermann's kyphosis referred to iran medical university of tehran in collaboration with a clinic of technical ortopedea in isfahan. material and method: this new version of orthosis had a dynamic system as compared to previous ones which enabled the spine to extend. a question...