Listar Theses & Dissertations por título
Mostrando ítems 4014-4033 de 4070
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Virus asociados al marchitamiento súbito de la sandía (Citrullus lanatus) en el suroeste de Puerto Rico
(2012)Las enfermedades virales son un factor limitante en la producción comercial de sandía [Citrullus lanatus (Thumb) Matsun & Nakai] en la zona suroeste de Puerto Rico. Muestreos realizados durante los años 2009 y 2010 ... -
Vision and inspection systems for manufacturing cardiac pacing and defibrillation leads
(2004)Automated visual inspection systems are an indispensable component of modern manufacturing processes. A machine visual system eliminates any errors related to human fatigue and accommodates increases in production without ... -
A visualization porlet for atmospheric sensing applications
(2009)Grid technologies are changing the perspective of what we thought possible in the computing world by enabling both the aggregation of resources to solve large scale problems and the transparent access to those resources. ... -
Vivaldi antenna array for a solid state space distributed amplifier
(2009)This work reports the design of a Vivaldi antenna array for a space distributed solid state amplifier at X-Band and the specifications in the amplifier design. A tray configuration inside an over-moded waveguide is used. ... -
Vivencias de los profesionales del trabajo social comunitario ante la pandemia del covid-19 durante los años 2020 al 2023
(2023-12-20)Este trabajo investigativo, recoge las experiencias de los y las profesionales de trabajo social comunitario durante la pandemia por covid-19. Para explorar estas experiencias, se utilizó como referencias los siguientes ... -
VO2-based multiple state micro-mechanical memory
(2011)A VO2-coated silicon micromechanical cantilever capable of achieving multiple positional states is presented. The demonstrated mechanical memory uses the bimorph cantilever tip displacement as the programming parameter, ... -
Vocal interactions and song performance in Adelaide’s warbler (Setophaga adelaidae)
(2015)Vocal interactions are very common in songbirds. Song-type matching is a kind of vocal interaction in which an individual matches the song-type that his neighbor sang. Traditionally, song-type matching has been considered ... -
Voice onset time for voiced and voiceless stops across English proficiency levels for sixteen Puerto Rican Spanish speakers at the University of Puerto Rico at Mayagüez
(2007)This thesis examined Voice Onset Time (VOT) for voiced and voiceless stops across four English proficiency levels for sixteen Puerto Rican Spanish speakers at the University of Puerto Rico at Mayagüez. It used a Production ... -
Volatilidad del tipo de cambio y su efecto en el crecimiento económico: el caso de México
(2020)En esta tesis se estudia la relación causa y efecto que tiene la volatilidad del Tipo de Cambio en el Crecimiento Económico para México. Se propone utilizar un modelo GARCH para la estimación de la variable volatilidad, ... -
Voltage regulation and reactive power services from rooftop photovoltaic systems for distributed generation rates
(2017-05)La red eléctrica es una parte fundamental del desarrollo socioeconómico de un país. Hoy en día, el sector eléctrico enfrenta desafíos importantes debido a mayor uso de fuentes de energía renovables. La generación distribuida ... -
¿De vuelta a la crianza? Experiencias y realidades de abuelos y abuelas criando nietos en Puerto Rico
(2024-05-19)La investigación tuvo como propósito auscultar las experiencias de los/as abuelos/as que asumen nuevamente la responsabilidad de criar y el significado que adscriben a la misma. Se exploró el impacto y las implicaciones ... -
Vulnerabilidad de las cadenas de suministros de alimentos y la inseguridad alimentaria, el cambio climático y el desarrollo de estrategias de adaptación: El caso de Haití
(2020-12-08)Food security is achieved when all people, always, have physical and economic access to enough food, safe and nutritious, to satisfy their food needs and preferences, in order to lead an active and healthy life (FAO, 2018). ... -
W phase source inversion for Caribbean earthquakes at the Puerto Rico seismic network: a first approach
(2018)Puerto Rico and the Virgin Islands (PRVI) are located in the Northeastern Caribbean, a seismically active zone. Historical records show that large damaging earthquakes have occurred in 1867 (M 7.3), 1918 (M 7.3) and 1943 ... -
A walk through the standing stones: The historical novel, gender and the supernatural in Diana Gabaldon’s Outlander.
(2019-05-13)Traditionally, historical/fantasy novels perpetuate stereotypical narratives; said works are situated in the past and provide some historical background, though unfortunately history is often sacrificed in the quest for ... -
WAMDAS: a web service-based wireless alarm monitoring and data acquisition system for pharmaceutical plants
(2005)Typical IT infrastructures used in manufacturing companies such as pharmaceutical plants are based on enterprise servers, with vast capacities for large data sets, managed with relational database systems, with powerful ... -
Ward - a web based application for accessing remote sensing archive data
(2011)This work presents distributed n-tier architecture based web application, named WARD, providing ubiquitous and secured access to archived remote sensing data at the UPRM Laboratory for Applied Remote Sensing and Image ... -
Water hammer analysis of Villalba-Coamo potable water transmission line
(2009)The hydraulic behavior of a new potable water transmission line that flows from Villalba to Coamo was analyzed using computer modeling. The modeling considered steady-state and transient simulations. All the input data in ... -
Water quality assessment of a tropical freshwater marsh using aquatic insects
(2005)Laguna Cartagena, located in the municipality of Lajas, is the only natural freshwater lagoon of Puerto Rico. The lagoon gives refuge to many animal and plant species, some of them endemic and endangered. Agriculture in ...