Describes a method for compressing tomographic images obtained using Positron Emission Tomography (PET) and Magnetic Resonance (MR) by applying transform compression using all available dimensions. This takes maximum advantage of redundancy of the data, allowing significant increases in compression efficiency and performance. (13 references) (KRN)

CHROMACODE is a conceptual tool that uses systematic, logical, and visual processes for organizing and analyzing qualitative research findings for the researcher with relatively low technical knowledge of data analysis. It can best be described as a visual conceptual scheme with coding based on a color-dependent procedure. Color provides a sense…

Presents new methods for compressing bit matrices in large information retrieval systems which exploit possible correlations between rows of words and columns of documents. Three encoding methods are tested and compared--Shannon-Fano, arithmetic, and Huffman--and an appendix discusses binomial coefficients. (20 references) (LRW)

Proposes a scheme of hierarchical piecewise linear approximation as an adaptive image pyramid. A progressive image coder comes naturally from the proposed image pyramid. The new pyramid is semantically more powerful than regular tessellation but syntactically simpler than free segmentation. This compromise between adaptability and complexity…

Results from a study in which 25 deaf children and 25 hearing children completed a vocabulary test and a compound stimulus visual information task support the hypothesis that performance on cognitive tasks is dependent on compatibility of task demands with a coding orientation. (SLD)

Describes the design of optimal tree-structured vector quantizers that minimize the expected distortion subject to cost functions related to storage cost, encoding rate, or quantization time. Since the optimal design problem is intractable in most cases, the performance of a general design heuristic based on successive partitioning is analyzed.…

This research investigates the effects of prosody on children's recall for stories using two successive studies. Study 1 is an ethnographic exploration of a group of fifth graders creating summaries of a children's story with overt prosodic elements. Study 2 is a quasi-experiment in which the story summaries created by students who heard one of…

How nursing science researchers conducting mixed method triangulation are using the heterogeneity of irrelevancy assumption in practice was studied. Seven questions were developed to reflect the implications for practice of the heterogeneity assumption. Answers to these questions were obtained from 23 written cases (14 articles, 1 presentation,…

Sociologists have long reflected on what should be taught in sociology. In recent years, the Scholarship of Teaching and Learning (SoTL) has produced several important publications on key principles and learning goals for the introductory course. However, little current work has systematically examined what peer-recognized leaders in the field…

To better understand the form and recognizability of neonatal smiling, 32 newborns (14 girls; M = 25.6 hr) were videorecorded in the behavioral states of alertness, drowsiness, active sleep, and quiet sleep. Baby Facial Action Coding System coding of both lip corner raising (simple or non-Duchenne) and lip corner raising with cheek raising…

The Repertory Grid Technique (RGT) is an interviewing and measurement strategy that originated as a methodological component of the Personal Construct Theory of G. Kelly (1955). Because the RGT focuses on internal processes, it can enhance a key informant interview in that the comparisons it requires the respondent to make stimulate connections…

Describes a method for coding themes directly from audiotapes without transcription and issues and methods by which reliability can be established. A study of concerns of professionals being trained on 11 school-based support teams coded by 2 raters and based on 19 hours of audiotaped interviews illustrates the method. (SLD)

Presents two new algorithms for performing arithmetic coding without employing multiplication and discusses their implementation requirements. The first algorithm, suitable for an alphabet of arbitrary size, reduces the worst case excess length to under 0.8%. The second algorithm, suitable only for alphabets of less than 12 symbols, allows even…

Presents an inference algorithm that produces a weighted finite automata (WFA), in particular, the grayness functions of graytone images. Image-data compression results based on the new inference algorithm produces a WFA with a relatively small number of edges. Image-data compression results alone and in combination with wavelets are discussed.…

Through study of 32 students' narratives about coping with external threats to their career goals (e.g., denial of admission to the major of their choice), this study examines the following issues: (a) the coping mechanisms student use when faced with threats that loom large, (b) the relation between coping methods employed and whether the goal is…