We study some equivalency relations between Hilbert frames and closed subspaces of l2(I). We define also a distance between frames and we establish the geometric meaning of this metric. Finally we find the closest and respectively the nearest tight frame to a given frame.

DDC Online is a web-based catalog of product lines of the leading manufacturers of building direct digital control (DDC) systems presented using a generic architecture and common terminology, thereby simplifying the task of comparing products of different manufacturers. DDC Online is a very useful tool for specifying engineers and commissioning providers tasked with assessing the equivalency of...

Exact absorbing conditions are used in computational electrodynamics of nonsine waves for truncating the domain of computation when replacing the original open initial boundary value problem by a modified problem formulated in a bounded domain. In this paper we prove the equivalency of these two problems.

background and aim: quick speech in noise (q-sin) test has popularity for evaluating speech recognition in noise. the present study has been paid to build five new persian lists with respect to all possible factors affecting the test, to determine validity of the test and to run five lists for normal hearing subjects and assessment of reliability. methods: to build lists, frequent, familiar and...

BACKGROUND AND PURPOSE It is desirable to develop a bedside method for assessing cerebral development in the very premature infant to monitor the effectiveness of interventions aimed at improving cerebral development. Our aim was to describe the growth trajectory of the corpus callosum (CC) on cranial sonography in very premature infants. METHODS We recruited 100 very-low-birth-weight infants...

Prediction of human volume of distribution at steady state (V(ss)) before first administration of a new drug candidate to humans has become an important part of the drug development process. This study examines the assumptions behind interspecies scaling techniques used to predict human V(ss) from preclinical data, namely the equivalency of V(ss,u) and/or f(ut) across species. In addition, seve...

See related articles, p 882, p 889, and p 896 have increased, remained static, or decreased. In the United States alone, >60 000 infants weighing <1500 g are born annually. Magnetic resonance imaging (MRI) provides an opportunity to characterize the nature and timing of cerebral injury and alterations in cerebral development in preterm infants both during their intensive care unit stay and thro...

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