We describe a technique for improving problemsolving performance by creating concepts that allow problem states to be evaluated through an efficient recognition process. A temporakdiflerence (TD) method is used to bootstrap a collection of useful concepts by backing up evaluations from recognized states to their predecessors. This procedure is combined with explanationbased generalization (EBG)...

This paper presents an approach to domain modeling and knowledge acquisition that consists of a gradual and goal-driven improvement of an incomplete domain model provided by a human expert. Our approach is based on a multistrategy learning method that allows a system with incomplete knowledge to learn general inference or problem solving rules from specific facts or problem solving episodes rec...

In this paper, the authors analyze how the resonant modes of circular microstrip patch resonators are affected by the presence of circular apertures in the ground plane located under the patches. A rigorous full-wave analysis in the Hankel transform domain (HTD) is carried out in order to obtain the resonant frequencies, quality factors, and radiation patterns of the circular microstrip patch r...

In broadband DS-CDMA using frequency-domain equalization (FDE) without cyclic prefix (CP) insertion, the transmission performance degrades due to inter block interference (IBI) and circular property loss. In our previous study, we introduced the perfect IBI cancellation and circular property restoration to mitigate the problems arising from IBI and circular property loss. The perfect channel es...

We describe a novel tunable optical filter for use in optical-frequency-domain multiplexed communication systems. The shift in the Bragg condition of a fiber Bragg grating as a result of magnetically induced circular birefringence is calculated with coupled-mode theory on the basis of circular states of polarization, and the values obtained for silica and terbium-doped optical fibers are compared.

We report the use of an engineered ribozyme to produce a circular human exon in vitro. Specifically, we have designed a derivative of a yeast self-splicing group II intron that is able to catalyze the formation of a circular exon encoding the first kringle domain (K1) of the human tissue plasminogen activator protein. We show that the circular K1 exon is formed with high fidelity in vitro. Furt...