Browsing Theses & Dissertations by Title
Now showing items 2720-2739 of 3469
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A quadratic model for budget planning related to the diet problem
(2014)This research deals with a variation of the notorious diet problem, which seeks to minimize the budget needed for an individual’s diet, subject to nutritional constraints, among others. Here, we address the problem from a ... -
Qualitative identification of fecal coliform bacterial sources
(2006)The main objective of this work is to provide a procedure to identify fecal coliform bacterial contamination sources within specific regions employing Geographical Information Systems (GIS) technology. The work presented ... -
Quantification of the transcriptional activity of genes associated with cyanogenesis in Cassava (Manihot esculenta Crantz)
(2008)Cassava has cyanogenic glycosides in its roots and leaves. These compounds function in plants as protective agents against herbivores as well as the translocable form of reduced nitrogen. The genes involved in the cyanogenic ... -
Quantum cascade laser-grazing angle spectroscopy detection of high explosives deposited on various substrates using air spray
(2020-04-19)The mid-infrared (MIR) laser reflectance of samples of high explosives (HEs) deposited on reflective and matte substrates using spray deposition was measured and used to generate multivariate (MVA) models for the analysis ... -
“Que le pongan salsa”: La comprensión de lectura bajo el efecto de la música conocida y desconocida de fondo en universitarios
(2021-07-31)¿Prefiere estudiar con música de fondo o sin música de fondo? A partir de Hall (1951),algunos investigadores se han preguntado si la música promueve o inhibe la comprensión de lectura. Las habilidades cognitivas, incluyendo ... -
Queen triggerfish Balistes vetula reproductive biology in US Caribbean waters
(2018-05)Effective fisheries management requires a detailed understanding of the life history strategies of managed species. Queen Triggerfish Balistes vetula supports productive fisheries in the western Atlantic, including in ... -
Quinoa and amaranth: multi-purpose agro-industrial crops
(2019-03-19)Studies were conducted in 2018 with two multi-purpose agro-industrial crops [quinoa (Chenopodium quinoa Willd.) and amaranth (Amaranthus sp.)] to characterize its chemical composition. Limited information is available on ... -
R-torsion on (2,n)-torus knots.
(2018-11-02)This thesis study the (2,n)-torus knots, uses the Khovanov Homology and Reidemeister Torsion. We show the study made to the Khovanov Homology Groups H^r, for r = -n, -n+1, -1; 0. These are isomorphics to either Z, Z_2 ... -
The r/evolution of the Victorian femme fatale
(2016)The focus of this thesis is to examine the construction of femme fatale representations of nineteenth century England, particularly in mid- Victorian to fin-de-siècle art and literature, thus tracing radical and significant ... -
Radiation tolerance and signal risetime of the cms pixel detector
(2013)The Compact Muon Solenoid (CMS) is one of the main experiments at the large hadron collider (LHC). This thesis presents the study of two important features of the CMS pixel detector. The first study shows the performance ... -
Radio Huelga: Experiencias de una radio ciudadana y sus contribuciones al trabajo con comunidades y la construcción de ciudadanía
(2021-01)En esta investigación se estudió la experiencia de medio de comunicación ciudadano de Radio Huelga a través del estudio de caso etnográfico, para comprender cómo se dieron los procesos de construcción de ciudadanía de sus ... -
Rain gauge concept using s-band and w-band for estimation of moderate to heavy precipitation
(2004)In this research, two Doppler radars working at W-band (95GHz) and at S-band (2.8GHz) together with radiosonde observations (RaOb) were used to retrieve physical parameters such as rainfall rate and vertical air motion ... -
Rare earth ( Π = Ce, Er, Pr) substituted Bi (4-X) Π X Ti3O12 thin films: synthesis, structural and ferroelectric properties
(2005)In the present research, rare earths (Π= Ce, Er, Pr)-substituted bismuth titanate Bi(4-x) ΠxTi3O12 thin films were synthesized by a chemical solution deposition (Sol-Gel) technique. Films were deposited by spin coating on ... -
(Re) Víctimas del Suicidio: Percepciones de personas adultas sobre factores, detonantes, protocolos y servicios dirigidos a esta población en Puerto Rico.
(2021-12-17)Puesto que en Puerto Rico se atiende una gran cantidad de llamadas relacionadas con el suicidio mediante las líneas de orientaciones o de emergencia, se considera el suicidio un asunto que requiere atención inmediata. Por ... -
(Re)escribir la maternidad : un acercamiento cultural a los procesos de educación y sanación materna
(2016-05-26)El siguiente proyecto fue presentado como requisito para la Maestría en Gestión y Administración Cultural. El mismo tuvo como eje de partida trabajar el tema de la maternidad( es) desde una postura de gestión cultural. Con ... -
Re-creating the text: Jane Austen’s Pride and Prejudice and its film adaptations
(2009)Film adaptation is a relatively new and popular form of studying texts, which is very important to our society because of the effect that adaptation has on it. The differences between the “original” text and adaptation ... -
Re-engineering a diverse service system: Multi-criteria resource assignment
(2017)Balancing supply and demand in service organizations is a complex problem that should be approached using mathematical modeling. This work developed a resource assignment formulation that deals with the mismatch between ... -
Reading attitudes, habits and performance of third grade ESL students participating in a reading challenge program
(2009)The study examines the reading attitudes, habits, and performance of third graders in an urban elementary school in Mayagüez, Puerto Rico participating in a 20 Book Reading Challenge Program. Five methods were used: ...