• Effects of processing on the properties of aluminum-cerium-based alloys 

  Vázquez, Mairym (2020-12-09)

  This research seeks to characterize Al-Ce-based alloys processed via different routes. These production methods include powder-in-tube, gravity casting, and powder extrusion. Al-Ce alloys samples were made by gravity casting ...

• High explosives detection in international mail using See-Through Raman Spectroscopy assisted by multivariate analysis 

  Muñiz-López, Wilmaris (2020-12-09)

  See-Through Raman Spectroscopy (STRS) was used for the non-invasive, non-destructive sample analysis of high explosives (HEs) in mail envelopes or flats. The method resulted in a safe and rapid analysis of HEs: ammonium ...

• Application of massive multiplayer online role-playing games as a language learning resource through experiential learning in educational contexts 

  Acevedo-Muñiz, Ismanuel (2020-12-11)

  This case study aims to investigates how integrating lesson plans involving massive multiplayer online role-playing games (MMORPGs) into the English classroom can help Puerto Rican second language learners (SLLs) of English ...

• The emergence of a new identity: The Nuyorican Afro-Boricua as presented in selected works by poets Louis Reyes Rivera and Jaime “Shaggy” Flores 

  Correa-González, Fernando E. E. (2020-11-25)

  This thesis is informed by the subject of race and identity within the works of Puerto Rican authors who live in the United States. Thus, it establishes an argument of exploring the Afro-Boricua identity in the works ...

• A method of fabrication of ultra-high temperature ceramic nanoparticles using acoustic cavitation 

  Orozco-Palencia, Omar D. (2020-12-11)

  Production of ultra-high temperature ceramics (UHTCs) has been studied for several decades, especially for applications on the aerospace industry that require materials for extreme environments. Traditional methods of ...

• Synthesis of novel ferrocene complexes with androgens vectors, biological activity and their interactions with proteins 

  Narváez-Pita, Xiomara (2020-12-11)

  Four novel complexes were synthetized by aldol condensation reaction and characterized by different spectroscopic techniques using ferrocenecarboxaldehyde as starting material, and using the hormones ( 3α-hydroxy ...

• Structural analysis of common coastal structures found at the west coast of Puerto Rico using FEMA P-646 

  Romeu-Torres, Jorge Alberto (2020-12-11)

  Tsunamis are a rare yet powerful oceanic events consisting of a series of very long waves caused by a large-scale disturbance of a body of water, usually by earthquakes, that travel inland causing a tremendous amount of ...

• Fish assemblages across artificial and natural reefs in Puerto Rico: Implications for management 

  Nieves-Ortiz, Manuel Amaury (2020-12-11)

  When accompanied with well-informed management actions, active restoration strategies such as coral gardening and deployment of artificial reef structures can help mitigate negative effects of human impact on fish assemblages ...

• Genetic characterization of host-microbiome-pathogen dynamics in ancient Amerindians of Punta Candelero, Puerto Rico 

  Román-Busó, Gabriela Paola (2020-10-27)

  This thesis seeks to address the deficit of ancestral human references from the tropics, specifically the Caribbean, by adding genetic (genomic and microbiomic) information from the ancient Puerto Rican Amerindian population ...

• A microelectronic fluorescence sensing system for rapid detection of Enterococcus faecalis using gradient detection IC and on-chip photodiodes 

  Acevedo-Chaparro, Jensen Jovan (2020-12-11)

  This work presents the design of a custom microelectronic fluorescence sensing system for rapid detection of Enterococcus faecalis, enterococcus, or total coliform bacteria using commercially available EPA-approved ...

• Modeling the spread of ultrafine particulate matter emitted by motor vehicles, their effects as asthma triggers with a result of optimal control 

  Rosado-Pérez, Michelle N. (2020-12-08)

  The Global Burden of Diseases estimated asthma prevalence to be 339.4 million people worldwide in 2016 alone, being air pollutants one of its main causes. Ultrafine particulate matter (UFP) are air pollutants that affect ...

• CFD numerical simulations to elucidate the wind speedup generated by the geomorphic complexity of Puerto Rico 

  Cruz García, Edward L. (2020-12-11)

  FEMA commissioned a joint effort study after Hurricane Maria (2017) for Puerto Rico to develop Special Wind Region Maps, as specified in ASCE 7-16 wind guidelines. The venture was led by the Strategic Alliance for Risk ...

• Development of an analytical trapezoidal MOSFET model: Used in a methodology for gate enclosed MOS transistors design based on technology layout rules 

  Contreras Ospino, Boris Miguel (2020-12-07)

  Gate enclosed or annular MOS transistors are one of the more successful solutions to improve the radiation resistance in an electronic circuit. There are many types of research and works regarding one of the main issues ...

• Efecto de edad a la matanza sobre la calidad de la carne bovina de la raza Senepol criados solo a pastoreo 

  Hernandez Marquez, Zamara I. (2020-12-11)

  The Senepol bovine breed is a meat-type Bos taurus well adapted to the tropical climate, such as that found in Puerto Rico. This breed has proven to be an important addition to the genetic group of cattle that are raised ...

• Transport phenomena in crossflow jets subject to very strong favorable pressure gradient 

  Quinones Rodriguez, Carlos Javier (2020-12-10)

  Incompressible jets transversely issuing into a spatially-developing turbulent boundary layer is one of the most challenging types of three dimensional flows not only due to its fluid-dynamic complexity but also due to ...

• Reproductive biology of two ecomorphs of the Caribbean coral Montastraea cavernosa in La Parguera, Puerto Rico 

  Morales-Medina, Jeffry (2020-12-09)

  The reproductive success of corals is an important element for the maintenance of populations, community and ecosystem function. The common Caribbean reef-building scleractinian Montastraea cavernosa has two distinct, ...

• The impact of dividend policy on banks' value in the US stock market 

  Lizardo, Benjamin Arturo (2020-12-07)

  This research examines the impact of dividend policy on 35 of the banks listed on the NYSE. This study developed two empirical models: the first (Model1) was based on the theory of the relevance of dividends, and the second ...

• A mathematical model to predict misalignment of SOIC packages in the presence of a dielectric fluid 

  Aparicio Moscoso, Yohan Aldemar (2020-12-04)

  This thesis presents the development of a mathematical model to predict misalignment of Small Outline Integrated Circuits (SOIC) packages in the presence of a dielectric fluid, when manipulated by a pick-and-place ...

• Carbonate chemistry dynamics in The Bioluminescent Bay: A tropical mangrove lagoon in La Parguera, Puerto Rico 

  García-Troche, Erick (2020-12-09)

  Mangrove ecosystems were identified by recent research as capable of buffering coastal ocean acidification (OA) and acting as refugia for scleractinian corals, suggesting that sulfate reduction and carbonate sediment ...

• Fungi associated with demosponges from Puerto Rico 

  Rosado Rodríguez, Gualberto (2020-11-24)

  Fungi are distributed worldwide and perform a variety of services in the environment. They are regarded as decomposers, involved in carbon cycling and immobilization in the ecosystem. Many are important symbionts of plants, ...

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