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PURPOSE The performance of low-income African American preschoolers (36 to 52 months old) on the Peabody Picture Vocabulary Test--Third Edition (PPVT-III; L. M. Dunn & L. M. Dunn, 1997) was examined to provide a norm for assessing the performance of this population and to explore the link between socioeconomic status (SES) and language scores on the(More)
AIM To investigate the structures and immunomodulation activity of four homogeneous polysaccharides: LBP 1a-1, LBP 1a-2, LBP 3a-1 and LBP 3a-2 isolated from Lycium barbarum L. brought from Zhongning County, Ningxia Province. METHODS Their molecular weights, sugar component (constituents) and their linkages were determined by gel permeation chromatography,(More)
—An iterative hybrid method combining the Kirchhoff approximation (KA) and the multilevel fast multipole algorithm (MLFMA) is studied for electromagnetic scattering from a three-dimensional (3-D) object above a two-dimensional (2-D) random dielectric rough surface. In order to reduce the computational costs, some treatments have been studied. Firstly, the(More)
This study examined the performance of 701 low-income African American preschoolers (36 to 52 months old) on the Preschool Language Scale-3 (PLS-3, I. L. Zimmerman, V. G. Steiner, & R. E. Pond, 1992). On average, African American children performed about 1 SD below the expected means for their ages on both the Expressive Communication and Auditory(More)
—The electromagnetic scattering of the synthesized three-dimensional (3-D) breaking wave crests which are formed by azimuthally aligning the individual 2-D breaking wave profiles has been numerically studied at the low-grazing angles (LGA) by using the multilevel fast multipole algorithm (MLFMA) with adaptive higher order hierarchical Legendre basis(More)
Children from low-income families are at increased risk for significant behavioral and language problems. Early identification of these problems is essential for effective intervention. The purpose of the present study was to use multiple behavioral assessments to examine the behavioral profiles of sixty 3- and 4-year-old children from low-income families(More)
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