Browsing Theses & Dissertations by Title
Now showing items 479-498 of 2526
-
Damage assessment under repeated slamming and creep of foam core sandwich composites
(2013)Sandwich composites are increasingly being used in the ship hull design due mainly to (i) their high strength to weight ratio, and (ii) the ability to functionally grade them for a broad range of commercial and naval ... -
Damage detection and identification in sandwich composites using neural networks
(2005)Marine, aerospace, ground and civil structures can receive unexpected loading that may compromise integrity during their life span. Therefore, improvement in detecting damage can save revenue and lives depending upon the ... -
Data-driven life prediction model for bearing failure
(2009)Throughout this work, a prognostic tool for the prediction of the remaining useful life of bearings using experimental data based on vibration data analysis is developed using MATLAB®. The experimental data used us that ... -
Dealing with ill conditioning in recursive parameter estimation for a synchronous generator
(2006)This thesis presents how to deal with ill-conditioning in recursive parameter estimation for a synchronous generator using subset selection, the Extended Kalman Filter (EKF), and the Iterated Extended Kalman Filter (IEKF). ... -
A decentralized negotiation framework for restoring electrical energy delivery networks with intelligent power routers - iprs
(2005)Current Electrical Energy Delivery Networks (EEDN) are managed from a centralized operations and control center. In the event of a system failure, human operators at this control centers device schemes for restoring the ... -
Deciphering bahía fosforescente: New approaches towards the understanding of this unique ecosystem
(2015)For decades, bioluminescent bays and lagoons have intrigued and puzzled researchers due to the accumulation of high cell densities of the bioluminescent dinoflagellate Pyrodinium bahamense var. bahamense. In recent years ... -
Deciphering the Debaryomyces spp. complex using next generation sequencing: Are they the same species?
(2018-05)Debaryomyces hansenii is a unicellular marine yeast, from the Phylum Ascomycota and is widely distributed in nature. It has been isolated from high salt environments like estuaries and bays, to salty foods and cheese. ... -
A decision support system for gate operations at Clarence Cannon National Wildlife Refuge (CCNWR) in Pike County, MO
(2020-05-25)The purpose of the project is to create a decision support system (DSS) by developing guidelines on how to operate a gravity drain structure gate (GDSG) in the Clarence Cannon National Wildlife Refuge (CCNWR), located in ... -
A decision support tool for internal tankers logistics in Chemical Industry
(2010)This study presents a decision support tool (DST) developed in Visual Basic for Applications (VBA) for managing the logistics of a Yard in the Chemical Industry with the objective to minimize operational costs. It describes ... -
A decision tree-based approach for missing value imputation of mixed-type data
(2017-05)Researchers and practitioners of many areas of knowledge frequently struggle with missing data. Missing data is a problem because almost all standard statistical methods assume that the information is complete. Missing ... -
Deep reef fishes off La Parguera insular slope, Puerto Rico, and their connectivity with shallow reefs
(2013)This dissertation characterizes the fish community associated with Mesophotic Coral Ecosystems (MCEs) of the La Parguera shelf-slope between 2007 and 2011 using rebreather trimix technical diving. Fishes were identified, ... -
Definition and deployment of a quality System for a small firm — the model Factory of the mayagüez campus
(2008)This work presents the methodology and results of the deployment of a quality system in a small business environment. This quality system was implemented at the Model Factory of the University of Puerto Rico, Mayagüez ... -
Definition and deployment of quality tools for quality and uptime improvement in a manufacturing environment
(2006)In order to be able to prevail nowadays all companies must have knowledge of the new technologies and advances that arise daily, specially the manufacturing sector regulated by the FDA. As result of this, companies need ... -
Degradación de biodiesel y diversidad bacteriana en suelos arenosos de una zona industrial (Guayanilla, Puerto Rico)
(2005)Biodegradation of biodiesel from an industrial impacted sandy soil (Guayanilla Bay, Puerto Rico) and bacterial diversity was evaluated. Soil samples were amended with 2,500 mg/Kg of biodiesel and incubated during 41 days ... -
Degradación de p-Nitrofenol por bacterias en los ríos Añasco y Guanajibo y la Quebrada de Oro (Puerto Rico)
(2007)Biodegradation of p-nitrophenol and changes in bacterial communities during degradation process in water samples from the Añasco and Guanajibo rivers and Quebrada de Oro were determined. The degradation rate of p-nitrophenol ... -
Degradation of caffeine in coffee pulp by solid-state fermentation
(2015)Coffee pulp is the most abundant solid waste in coffee processing plants. Its reutilization could be a challenge due to the presence of compounds such as caffeine. In the current study the solid-state fermentation was ... -
Densidad poblacional de Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) y su relación fenológica con los cultivos de tomate y maíz
(2007)Helicoverpa zea (Boddie) is the most important insect pest of tomato, Lycopersicum esculentum (Mill.), and corn, Zea mays L. A study was conducted (2003-2004) to estimate the density and phenology of H. zea in commercial ... -
Densidad y altura de corte y su efecto sobre el rendimiento y persistencia de Ubon Stylo (Stylosanthes guianesnsis var. vulgaris x var. pauciflora) en un oxisol de Puerto Rico
(2009)Información sobre el comportamiento de Ubon Stylo (Stylosanthes guianensis; var. vulgaris x var. pauciflora), (95 por ciento de germinación) durante el período de establecimiento es limitante en Puerto Rico. Se evaluó los ... -
Dependence of active mode remote Ft-Ir sensing on angle of incidence, substrate type and analyte surface concentration
(2013-12)A standoff detection scheme for a highly energetic material (HEM) and other threat chemicals deposited on substrates as contamination residues using Fourier transform infrared spectroscopy (FTIR) is described. The HEM used ... -
Deposición de proteína y energía en tilapias (Oreochromis spp.) alimentadas con dietas sub-óptimas en proteína y suplementadas con ácido glutámico, alfacetoglutárico o succínico
(2011)Four experimental diets were formulated in order to determine their effect on weight gain, fat, protein and energy retention, and body composition of tilapias (Oreochromis spp.). The control diet was formulated to contain ...