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Now showing items 21-30 of 114
Alineamiento de pasos ópticos extensos, basados en una rejilla de diffraction de fase desenfocadora
(2004)
In a long baseline stellar interferometer, the optical beams are guided over several hundred meters by steering mirrors and generally propagated under vacuum. There is an urgent requirement to provide a simple mechanism ...
Generalizaciones de minimos cuadrados parciales con aplicación en clasificacion supervisada
(2004)
The development of technologies such as microarrays has generated a large amount of data. The main characteristic of this kind of data it is the large number of predictors (genes) and few observations (experiments). Thus, ...
Síntesis y caracterización de materiales en el sistema Ca1-xRxCu3Ti4O12 (R = Mg, Sr, Zn)
(2004)
Due to the high dielectric constant of CaCu3Ti4O12, there is interest in related material systems for high dielectric applications. Accordingly, becomes interesting to study the effect of some divalent cations replacing ...
Evaluación de los atributos principales de calidad de la carne de res de origen local e importada, según se ofrece al consumidor
(2004)
Beef consumed in Puerto Rico comes principally from the United States and Central America and it is believed that the quality is better than the local product. In this investigation three beef muscles (longissimus dorsi, ...
Morphometric and molecular analysis of the mabouia-brooki haitianus Complex (Sauria: Gekkonidae) at the Western-Central Region of Puerto Rico
(2004)
The genus Hemidactylus belongs to the family Gekkonidae, a group of nocturnal lizards of African origin. Several species from this genus have arrived to the Western Hemisphere and have spawned many studies because the time ...
Soil organic carbon and nitrogen distribution in a tropical watershed
(2004)
The role of soils in sequestering atmospheric carbon (C) and nitrogen (N) can best
be understood from a watershed perspective because the multiple influences of factors
influencing the process can be assessed simultaneously, ...
Study of text and numeric input modalities on pdas
(2004)
This study is about textual and numerical input modalities on PDAs for supporting nursing tasks. Four input modalities for textual data input and four for numerical data input are compared and discussed. A total of six ...
Estudio teórico y experimental de modelos para cálculo y control de presiones sub atmósfericas durante flujo transitorio
(2004)
This research introduced MacCormack numerical scheme for the solution of the
governing equations of two-phase transient flow. The numerical solution included an
analysis of the behavior of the wave velocity under adiabatic ...
A comparison in cluster validation techniques
(2004)
Clustering may be defined as a process that aims to find partitions of similar objects. It is an unsupervised recognition procedure since there are no predefined classes that indicate grouping properties in the data set. ...
Uso de técnicas de clasificación en conglomerados para describir perfiles en grandes bases de datos educativas
(2004)
This thesis describes the procedures used to identify the natural clusters formed by the students from Calculus that participated in the Quiz Project of the Mathematics Department at the University of Puerto Rico Mayagüez ...