The Web allows self-regulated learning through interaction with large amounts of learning resources. While enjoying the flexibility of learning, learners may suffer from cognitive overload and conceptual and navigational disorientation when faced with various information resources under disparate topics and complex knowledge structures. This study proposed a knowledge visualization (KV) approac...

Motion in depth and/or zooming cause defocus blur. We show how the defocus blur in an image can be recovered simultaneously with affine motion. We introduce the theory, develop a solution method and demonstrate the validity of the theory and the solution by conducting experiments with real scenery.

The most natural kinetic data structure for maintaining the maximum of a collection of continuously changing numbers is the kinetic heap. Basch, Guibas, and Ramkumar proved that the maximum number of events processed by a kinetic heap with n numbers changing as linear functions of time is O(n log n) and Ω(n log n). We prove that this number is actually Θ(n log n). In the kinetic heap, a linear ...

Adenylate cyclase systems were examined in purified membrane preparations from normal rat liver and several Morris hepatomas with differing growth rates. All tumor membrane preparations had lower relative specific activities than did liver preparations. Liver adenylate cyclase was stimulated by fluoride, glucagon and guanyl-5'-yl imidodiphosphate [Gpp(NH)p]. Membranes from two slow-growing hepa...

Oxidative metabolism of eosinophils has generally been studied in cells from patients with eosinophilia. We isolated eosinophils with purity of greater than 95% from normal donors. Oxygen metabolism of eosinophils and neutrophils was compared using O2-. production as a measure of the stimulus-induced respiratory burst. During 10 min of stimulation, using phorbol myristate acetate (PMA) or opson...

Previous in vivo studies suggest that constitutive nitric oxide (cNO) can regulate Na- glucose cotransport (SGLT1) and Na-H exchange (NHE3) in rabbit intestinal villus cells. Whether these two primary Na absorbing pathways are directly regulated by cNO and the mechanisms of this regulation in the enterocyte is not known. Thus nontransformed rat small intestinal epithelial cells (IEC-18) were tr...

G protein-coupled receptors (GPCRs) regulate a variety of intracellular pathways through their ability to promote the binding of GTP to heterotrimeric G proteins. Regulator of G protein signaling (RGS) proteins increases the intrinsic GTPase activity of Galpha-subunits and are widely regarded as negative regulators of G protein signaling. Using yeast we demonstrate that GTP hydrolysis is not on...

the use of deep brain stimulation in psychiatric disorders has received great interest owing to the small risk of the operation, the reversible nature of the technique, and the possibility of optimizing treatment postoperatively. currently deep brain stimulation in psychiatry is investigated for obsessive-compulsive disorder, gilles de la tourette’s syndrome and major depression. this presentat...

background: the preparation of endometrium for embryo reception is dependent on the ovarian hormones, which are affected by ovarian hyperstimulation procedure. objective: the aim of this study was to evaluate the changes in morphometrical indices of endometrium by the daily injection of progesterone after mouse ovarian induction. materials and methods: adult virgin female mice were selected and...

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