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PubMed1992

Visualization of bioelectric phenomena.

Biomedical investigators are currently able to acquire and analyze physiological and anatomical data from three-dimensional structures in the body. Often, multiple kinds of data can be recorded simultaneously. The usefulness of this information, either for exploratory viewing or for presentation to others, is limited by the lack of techniques to display it in intuitive, accessible formats. Unfortunately, the complexity of scientific visualization techniques and the inflexibility of commercial packages deter investigators from using sophisticated visualization methods that could provide them added insight into the mechanisms of the phenomena under study. Also, the sheer volume of such data is a problem. High-performance computing resources are often required for storage and processing, in addition to visualization. This chapter describes a novel, language-based interface that allows scientists with basic programming skills to classify and render multivariate volumetric data with a modest investment in software training. The interface facilitates data exploration by enabling experimentation with various algorithms to compute opacity and color from volumetric data. The value of the system is demonstrated using data from cardiac mapping studies, in which multiple electrodes are placed in an on the heart to measure the cardiac electrical activity intrinsic to the heart and its response to external stimulation.

Algorithms↗
PubMed1996

Medical language processing with SGML display.

The paper demonstrates several ways that medical language processing can be combined with emerging display technologies to facilitate the extraction of data from free-text patient documents. The techniques allow rapid review via highlighting of the results of processing. Coupling of text markup with further procedures is envisioned.

Asthma↗
PubMed2000

Improving the positive predictive value of screening for developmental language disorder.

In a previous study, we reported the results of an early language screening program in which 306 children were screened using a parent-report questionnaire sent through the mail (Klee et al., 1998). A sample of the children screened were given clinical evaluations within a month of screening (n = 64) and again 1 year later (n = 36). Although the screening program correctly identified 91% of 2-year-olds with language delay, it produced a large number of over-referrals. In the present study we examine a revised screening criterion designed to reduce the number of false positives. The revised criterion generated fewer positive screens overall than the original and resulted in improved specificity (96% vs. 87%) and positive predictive value (77% vs. 51%), while maintaining the high sensitivity (91%) and negative predictive value (98%) of the original criterion. We also propose a screening score based on the new criterion, designed to inform the process of deciding which children to bring in for further evaluation.

Child, Preschool↗
PubMed1998

Speech modifications algorithms used for training language learning-impaired children.

In this paper, the details of processing algorithms used in a training program with language learning-impaired children (LLI's) are described. The training program utilized computer games, speech/language training exercises, books-on-tape and educational CD-ROM's. Speech tracks in these materials were processed using these algorithms. During a four week training period, recognition of both processed and normal speech in these children continually increased to near age-appropriate levels. We conclude that this form of processed speech is subject to profound perceptual learning effects and exhibits widespread generalization to normal speech. This form of learning and generalization contributes to the rehabilitation of temporal processing deficits and language comprehension in this subject population.

Algorithms↗
PubMed1997

Evolutionary program induction directed by logic grammars

Program induction generates a computer program that can produce the desired behavior for a given set of situations. Two of the approaches in program induction are inductive logic programming (ILP) and genetic programming (GP). Since their formalisms are so different, these two approaches cannot be integrated easily, although they share many common goals and functionalities. A unification will greatly enhance their problem-solving power. Moreover, they are restricted in the computer languages in which programs can be induced. In this paper, we present a flexible system called LOGENPRO (The LOgic gramar-based GENetic PROgramming system) that uses some of the techniques of GP and ILP. It is based on a formalism of logic grammars. The system applies logic grammars to control the evolution of programs in various programming languages and represent context-sensitive information and domain-dependent knowledge. Experiments have been performed to demonstrate that LOGENPRO can emulate GP and GP with automatically defined functions (ADFs). Moreover, LOGENPRO can employ knowledge such as argument types in a unified framework. The experiments show that LOGENPRO has superior performance to that of GP and GP with ADFs when more domain-dependent knowledge is available. We have applied LOGENPRO to evolve general recursive functions for the even-n-parity problem from noisy training examples. A number of experiments have been performed to determine the impact of domain-specific knowledge and noise in training examples on the speed of learning.

Journal Article↗
PubMed1994

Improving cross-cultural skills of medical students through medical school-community partnerships.

Postulating that a program integrating language skills with other aspects of cultural knowledge could assist in developing medical students' ability to work in cross-cultural situations and that partnership with targeted communities was key to developing an effective program, a medical school and two organizations with strong community ties joined forces to develop a Spanish Language and Hispanic Cultural Competence Project. Medical student participants in the program improved their language skills and knowledge of cultural issues, and a partnership with community organizations provided context and resources to supplement more traditional modes of medical education.

Cross-Cultural Comparison↗
PubMed1997

Information retrieval: an overview of system characteristics.

The paper gives an overview of characteristics of information retrieval (IR) systems. The characteristics are identified from the descriptions of 23 IR systems. Four IR models are discussed: the Boolean model, the vector model, the probabilistic model and the connectionistic model. Twelve other characteristics of IR models are identified: search intermediary, domain knowledge, relevance feedback, natural language interface, graphical query language, conceptual queries, full-text IR, field searching, fuzzy queries, hypertext integration, machine learning, and ranked output. Finally, the relevance of IR systems for the World Wide Web is established.

Algorithms↗
PubMedDate not supplied

Structure and software tools of AIDA.

AIDA consists of a set of software tools to allow for fast development and easy-to-maintain Medical Information Systems. AIDA supports all aspects of such a system both during development and operation. It contains tools to build and maintain forms for interactive data entry and on-line input validation, a database management system including a data dictionary and a set of run-time routines for database access, and routines for querying the database and output formatting. Unlike an application generator, the user of AIDA may select parts of the tools to fulfill his needs and program other subsystems not developed with AIDA. The AIDA software uses as host language the ANSI-standard programming language MUMPS, an interpreted language embedded in an integrated database and programming environment. This greatly facilitates the portability of AIDA applications. The database facilities supported by AIDA are based on a relational data model. This data model is built on top of the MUMPS database, the so-called global structure. This relational model overcomes the restrictions of the global structure regarding string length. The global structure is especially powerful for sorting purposes. Using MUMPS as a host language allows the user an easy interface between user-defined data validation checks or other user-defined code and the AIDA tools. AIDA has been designed primarily for prototyping and for the construction of Medical Information Systems in a research environment which requires a flexible approach. The prototyping facility of AIDA operates terminal independent and is even to a great extent multi-lingual. Most of these features are table-driven; this allows on-line changes in the use of terminal type and language, but also causes overhead. AIDA has a set of optimizing tools by which it is possible to build a faster, but (of course) less flexible code from these table definitions. By separating the AIDA software in a source and a run-time version, one is able to write implementation-specific code which can be selected and loaded by a special source loader, being part of the AIDA software. This feature is also accessible for maintaining software on different sites and on different installations.

Database Management Systems↗
PubMed1981

Sensorimotor functioning and prelinguistic communication of severely and profoundly retarded individuals.

The prelinguistic, nonverbal communicative behavior of 40 institutionalized severely and profoundly retarded children and adolescents functioning at various stages of Piaget's sensorimotor period was examined. Five scales of the Uzgiris and Hunt (1975) sensorimotor assessment were used to determine general level of sensorimotor functioning. A standard set of communication elicitation tasks was employed to examine the gestures used to communicate in both imperative and declarative contexts. More competent sensorimotor performance was associated with higher frequency of more sophisticated and symbolic forms of gestural communication, and subjects generally used more complex gestures to communicate in the imperative than in the declarative tasks. Applicability of the results to the design of future language-intervention programs and their implications for general theory concerning the relations between language and cognition and between normal and atypical development were discussed.

Adolescent↗
PubMed2002

An English-language clinic-based literacy program is effective for a multilingual population.

OBJECTIVE: To assess the effectiveness of a clinic-based pediatric literacy intervention on a multilingual population. BACKGROUND: Clinic-based literacy interventions are effective among English- and Spanish-speaking children. No data exist for multilingual populations. SETTING: Pediatric clinic in an urban county hospital. Design/Methods. Reading practices of 2 cross-sectional groups were assessed by standardized interview before and after the intervention. The intervention consisted of waiting-room volunteers reading to children, literacy counseling, and gift of a children's book at each well-child visit from 6 months to 5 years. Outcomes were assessed separately for primary English-speaking and primary non-English-speaking families. RESULTS: The baseline (N=85) and postintervention (N=95) groups were similar with respect to child age and sex, parental education, and length of time in the United States. Fourteen languages were represented in total, the most common being English (41%), Somali (28%), Spanish (9%), Vietnamese (7%), Oromo (3%), and Tigrinyan (3%). Compared with baseline, postintervention respondents were more likely to report reading as a favorite activity for the child (10% vs 25%) and parent (18% vs 40%), to read to their child before bed at least weekly (45% vs 71%), and to possess over 10 children's books at home (49% vs 63%). Among English-speaking families (N=30 baseline, N=40 postintervention), weekly bedtime reading increased (63% to 93%), reading as child's favorite activity increased (7% vs 30%), and reading as the parent's favorite activity to do with child increased (33% vs 58%). The proportion of English-speaking families possessing over 10 books at home and those reading with their children at least weekly showed no difference between the baseline and postintervention groups. Among non-English-speaking families (N=55 baseline, N=55 postintervention), weekly bedtime reading increased (36% vs 56%), reading as the parent's favorite activity increased (11% vs 27%), and the number of families to possess >10 children's books in the home increased (31% vs 49%). Reading as child's favorite activity (13% vs 24%) and weekly book sharing (60% vs 76%) showed nonsignificant trends between the non-English-speaking baseline and postintervention groups. CONCLUSIONS: This clinic-based literacy intervention influences home literacy behavior in this multiethnic setting, in both English-speaking and non-English-speaking families. Although efforts should be made to make such programs more appropriate for linguistic minorities, non-English-speaking families do stand to benefit from English-language-oriented programs. literacy, Reach Out and Read, pediatrics, reading, child development.

Child, Preschool↗
PubMed1989

Language skills of children with different preschool experiences.

This study examined the language at age 5 of socioeconomically disadvantaged children who had been randomly assigned at birth to a language-enriched day care program with a parent education component, a parent education program without a language-enriched day care, or no treatment. The interventions were administered between the ages of 3 months to 5 years. Language measures, reflecting children's ability to manipulate topics, as well as their structural complexity, semantic diversity, and general talkativeness were examined. The results showed that the disadvantaged children who attended the language-enriched day care program with the parent education component used a significantly greater proportion of high quality topic manipulation skills and less low quality topic manipulation skills during conversation than did children in the other two groups. The day care effect on high quality topic manipulation was present even after adjusting for children's intelligence and for the amount of community day care experience of the children in the parent education alone and control groups. No significant treatment differences were found for structural, semantic, and talkativeness measures. Implications of the result for early language intervention are discussed.

Child Day Care Centers↗
PubMed1989

Adolescent language as affectively coded behavior: findings of an observational research project.

This study aims to formulate a minimal typology of the speech-programming categories of adolescent language. In all, thirty-six adolescents (ages 13 to 18) living in the city of Toronto were recorded both in spontaneous conversational settings and in formal interview sessions. The ensuing analysis of these recordings led to the postulation of three basic categories: emotive, connotative, and socially coded language programming. These categories can be seen to provide a framework within which to conduct more specific kinds of research on adolescent language.

Adolescent↗