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R DeBellis

Publications and source records attributed to R DeBellis.

4 recordsLinked to original sources
PubMed2001

Dynamic publication model for neurophysiology databases.

We have implemented a pair of database projects, one serving cortical electrophysiology and the other invertebrate neurones and recordings. The design for each combines aspects of two proven schemes for information interchange. The journal article metaphor determined the type, scope, organization and quantity of data to comprise each submission. Sequence databases encouraged intuitive tools for data viewing, capture, and direct submission by authors. Neurophysiology required transcending these models with new datatypes. Time-series, histogram and bivariate datatypes, including illustration-like wrappers, were selected by their utility to the community of investigators. As interpretation of neurophysiological recordings depends on context supplied by metadata attributes, searches are via visual interfaces to sets of controlled-vocabulary metadata trees. Neurones, for example, can be specified by metadata describing functional and anatomical characteristics. Permanence is advanced by data model and data formats largely independent of contemporary technology or implementation, including Java and the XML standard. All user tools, including dynamic data viewers that serve as a virtual oscilloscope, are Java-based, free, multiplatform, and distributed by our application servers to any contemporary networked computer. Copyright is retained by submitters; viewer displays are dynamic and do not violate copyright of related journal figures. Panels of neurophysiologists view and test schemas and tools, enhancing community support.

Animals↗
PubMed1982

Treatment of the blast crisis of chronic myelogenous leukemia with 5-azacitidine and VP-16-213.

Twenty-seven patients with chronic myelogenous leukemia in blast crisis were treated with a combination of 5-azacitidine (150 mg/m2/day iv in 3 divided doses x 5 days) and VP-16-213 (75 mg/m2/day x 5). No patient had lymphoid histology, and terminal transferase was not present in the 12 patients tested. One complete and 15 partial responses (58% response rate) were seen, with a median survival of 231 days for responders and 73 days for patients who failed to achieve a partial response (P = 0.008). The overall survival was 161 days (range, 20-316+). Moderately severe nausea and vomiting, muscle aches, and mucositis (two patients) were the major side effects, although toxic effects tended to decrease with subsequent courses and many patients could be treated on an outpatient basis. These results compare favorably with other results in this refractory disorders and suggest that 5-azacitidine and VP-16-213 be studied further, either in higher doses or in combination with other agents, in therapy for chronic myelogenous leukemia in blast crisis.

Adult↗
PubMedDate not supplied

Common data model for neuroscience data and data model exchange.

OBJECTIVE: Generalizing the data models underlying two prototype neurophysiology databases, the authors describe and propose the Common Data Model (CDM) as a framework for federating a broad spectrum of disparate neuroscience information resources. DESIGN: Each component of the CDM derives from one of five superclasses-data, site, method, model, and reference-or from relations defined between them. A hierarchic attribute-value scheme for metadata enables interoperability with variable tree depth to serve specific intra- or broad inter-domain queries. To mediate data exchange between disparate systems, the authors propose a set of XML-derived schema for describing not only data sets but data models. These include biophysical description markup language (BDML), which mediates interoperability between data resources by providing a meta-description for the CDM. RESULTS: The set of superclasses potentially spans data needs of contemporary neuroscience. Data elements abstracted from neurophysiology time series and histogram data represent data sets that differ in dimension and concordance. Site elements transcend neurons to describe subcellular compartments, circuits, regions, or slices; non-neuroanatomic sites include sequences to patients. Methods and models are highly domain-dependent. CONCLUSIONS: True federation of data resources requires explicit public description, in a metalanguage, of the contents, query methods, data formats, and data models of each data resource. Any data model that can be derived from the defined superclasses is potentially conformant and interoperability can be enabled by recognition of BDML-described compatibilities. Such metadescriptions can buffer technologic changes.

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