Browsing Theses & Dissertations by Title
Now showing items 2408-2427 of 2526
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Un algoritmo para clasificación no supervisada de datos funcionales
(2011-12)La estadística multivariada ofrece diversas herramientas que permiten realizar un análisis para ciertos conjuntos de datos. Sin embargo surge una rama de la estadística en la cual se dejan de observar conjuntos de datos ... -
Un algoritmo para la aplicación de ingeniería reversa en sistemas biológicos
(2009-05)Dado un conjunto de datos sobre un cuerpo finito Fq, queremos encontrar una función que interpole tales datos. Esta función se puede obtener por ingeniería reversa y es de la forma f = (f1, f2, ..., fn) : Fn −→ Fn donde ... -
Un caso de estudio para evaluar alternativas de inversión usando opciones reales
(2004)The traditional techniques used to evaluate investment alternatives do not appropriately capture the inherent uncertainty in multistage projects and do not allow for the consideration of managerial flexibility in the ... -
Un estudio de diferentes pruebas para el problema general de dos muestras
(2018-05)In its most general form the two-sample problem is concerned with the question whether two independent samples come from the same probability distribution. There are a wide variety of methods to test this hypothesis. We ... -
Un método de algoritmos genéticos para optimización de memorias asociativas morfológicas
(2006)Las Memorias Asociativas Morfológicas (MAMs) han probado ser un excelente método para identificación de patrones en presencia de ruido tanto dilativo como erosivo; pero por separado. Un método para identificar ruido erosivo ... -
Un modelo matemático para evaluar el efecto de herbivoría de la polilla (Oidaematophorus espeletiae Hernández, Fuentes Fajardo & Mathews) sobre el frailejón (Espeletia grandiflora Humb. & Bonpl.)
(2019-05-15)The Espeletia grandiflora Humb. & Bonpl. commonly known as frailejón is a plant of the Eastern Andes of Colombia, such that its function within the ecosystem is to regulate the production of water. In 2012, it was found ... -
Una propuesta multialgorítmica para el análisis de secuencias biológicas
(2012)With the completion of the Human Genome Project, between 20,000 and 25,000 genes related to human beings were sequenced, garnering more than 90 % of the DNA (deoxyribonucleic acid) human genome sequences. These are composed ... -
Understanding language ideologies in Puerto Rico: From colonialism to translanguaging
(2015)This thesis provides an historical analysis of the evolution of the monolingual paradigm in Puerto Rico. It traces the origins of the monolingual paradigm from the rise of the modern European nation-state, through US ... -
Understanding operator preferences towards manufacturing cell task assignments
(2013)Empirical research has shown that the majority of cellular manufacturing (CM) implementations do not consider in their design and operational phases socio-technical factors. However, in practice the performance and success ... -
Understanding the atmospheric turbulence structure parameter, Cn2, in the littoral regime
(2006)Understanding optical propagation through atmospheric turbulence is a highly important step for the efficient implementation of a free space laser communication system and for achieving diffraction limited imaging over ... -
Understanding the effect of spatial resolution on unmixing algorithms for hyperspectral imagery
(2010)This research work presents an experimental study on unmixing of hyperspectral images at different spatial resolutions. The study looks at how the assumptions made in the unmixing procedure affects the results of the ... -
Understory Plant Communities in the Surroundings of the Joyuda Lagoon, Puerto Rico
(2012)Studies focused on the distribution of understory species associated with mangrove forests are very scarce. This research provides a detailed description of the understory community and their environmental requirements at ... -
Unraveling the microbiome of the snail Caracolus marginella using metagenomics
(2018)The increased of Antibiotic Resistance (AR) is currently one of the most important public health threats faced worldwide. Increasing rates on AR has been observed globally. The use and analysis of non-traditional techniques ... -
Unsupervised classification of text documents
(2007)The automatic extraction of knowledge from very large document collections is becoming an important issue in order to exploit the increasing available information stored in text form. A significant aspect of this extraction ... -
Unsupervised unmixing analysis based on multiscale representation
(2013)Unsupervised unmixing analysis aims to extract the basic materials, the so called endmembers, and their abundances from a hyperspectral image. Unmixing is usually performed by pixels-only techniques that do not take into ... -
Unsupervised unmixing of hyperspectral imagery using the constrained positive matrix factorization
(2007)In hyperspectral imaging, hundreds of images are taken at narrow and contiguous spectral bands providing us with high spectral resolution spectral signatures that can be used to discriminate between objects. In many ... -
Untangling the effects of biogeography and host plant associations: phylogenetic and phylogeographic studies in the Exophthalmus genus complex
(2011)Phylogenetic as well as phylogeographic methods were implemented to assess the diversification of Caribbean entimine weevils. (1) A phylogeny of 62 species of entimine weevils (Coleoptera: Curculionidae: Entiminae) in the ... -
Use of ambient vibration measurements to estimate site fundamental periods at Condado and Isla Verde, PR
(2016-12)The knowledge of the natural periods of soil deposits in urban areas can be very valuable for the safe design of structures to avoid resonance conditions. This thesis presents a study aimed to estimate site natural periods ... -
The use of backpropagating neural networks in coordination with logistic spline coefficients to obtain the change-point
(2006)This work presents an algorithm that uses backpropagating neural networks and their ability to find logistic regression coefficients as a useful tool that may outperform other conventional methods for finding the change-point ... -
Use of crosslinked hydrogels for the control of macromolecular crystallization
(2012)Crosslinked hydrogels in protein crystallization is an area of continuous growth. The counterdiffusion technique is a novel method for the crystallization of proteins, which entails the minimization of convection effects, ...