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J H Walton

Publications and source records attributed to J H Walton.

6 recordsLinked to original sources

Black English in a Mississippi prison population.

Nine linguistic features unique to Black English were examined in the speech of 87 Black and 77 White inmates of a Mississippi prison population. The purpose of the study was to determine whether Black inmates could be distinguished from White inmates by their use of the present progressive, final stops, distributive be, remote aspect been, noun plurals, third person singular present tense, possessives, consonant clusters, and the copula. Results showed that use of eight of the nine features accurately predicted the ethnicity of the subjects. Only remote aspect been failed to identify ethnic differences. Identification of dialect variation among minority populations and more specifically among prison populations is an important step toward providing effective remediation programs.

Adult

Flow velocity measurement with ac gradients.

Two NMR experiments are described that use ac field gradients to measure flow velocities. Both experiments perform no spacial localization; instead, fluid velocity is converted to a resonance frequency shift. Thus, by Fourier transformation of a single FID or echo train the distribution of velocities is available. The first experiment uses only one rf pulse but requires a homogeneous static field. The second experiment uses the CPMG multiple-pulse sequence to refocus the effects of field inhomogeneity and chemical shifts. Results are shown for both experiments using a simple flowing phantom. Applications of the techniques to time-resolved blood flow measurement are discussed.

Blood Flow Velocity

[Polymyositis].

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Dermatomyositis