A covariance condition is shown to be a necessary condition for the existence of a finite control law associated with discrete-time quadratic loss-minimisation problems. Sufficient conditions (including the covariance condition) are then determined which extend the range of optimal-control problems, for which a well defined control law may be calculated. The results may also be applied to solvi...

Previous reports suggest that introducing distracting visual transients during a change detection task can result in change blindness. In four experiments we find that presenting the distracting transients repeatedly prior to the change produces a recovery from change blindness. This recovery from change blindness is not due solely to low-level neural adaptation of transient detectors, but inst...

In a parametric amplifier (PA) driven by two pump waves the signal sideband is coupled to three idler sidebands, all of which are frequency-converted (FC) images of the signal, and two of which are phaseconjugated (PC) images of the signal. If such a device is to be useful, the signal must be amplified, and the PC and FC idlers must be produced, with minimal noise. In this paper the quantum noi...

Experiments on the primary visual cortex (V1) of monkeys have established that (1) V1 neurons respond to certain low-level visual features like orientation and color at specific locations, (2) this selectivity is preserved over wide ranges in contrast, (3) preferences are each mapped smoothly across the V1 surface, and (4) surround modulation effects and visual illusions result from complex pat...

In this paper a high-level model is proposed for quadrature oscillators that are based on two RC oscillators with capacitive coupling. The capacitive coupling technique has the advantages of being noiseless and not increasing the power requirements, which are important features for low power receivers. This coupling technique was already study for LC oscillators but not for RC oscillators. Simu...

This article examines the extent to which indicators of the college-going climate of urban high schools are associated with students’ application to, enrollment in, and choice among four-year colleges. The investigators examine two mechanisms by which high schools may shape college enrollment among low-income students in an urban school system: (1) by ensuring whether seniors who aspire to a fo...

This paper presents the results of the research about the level of information and communication technology (ICT) implementation by the Ukrainian enterprises. We studied different Web-sites and made more detailed research about ICT implementation at the Odessa industrial enterprises. The conclusion is made that the state of Odessa e-commerce market does not correspond to the current state of IC...

This paper describes three related, high-level, strategic patterns that deal with the issue of capacity planning for an e-Business facility. The first, "Build-in Redundancy" suggests that extra capacity is needed in Web service provision to account for increases in demand and component downtime. "Overbuild Sucks" then tempers the consequences of redundancy and, finally, "Share Resources Careful...

In order to compete with others, high education need complete their infrastructure with Information technology support. High level management as a decision maker needs something that can boost the system to compete with other high education. They need IT knowledge that can support them to view the future and can help the whole system to improve their services. Business Intelligence is one of te...

For more than a decade, the eHealth initiative has been a government concern of many countries. In an Electronic Health Record (EHR) System, there is a need for sharing the data with a group of specialists simultaneously. Collaborative platforms alone are just a part of a solution, while a collaborative platform with parallel editing capabilities and with synchronized data streaming are stringe...