Now showing items 1-20 of 822

    • The 2017-2018 Evaluation of the National Operational Excellence Index in Puerto Rico 

      Camacho Cruz, Natali A. (Polytechnic University of Puerto Rico, 2019-08-19)
      Puerto Rico has not participated in the evaluation of the World Forum Competitive Index (WFCI) since 2015; consequently, the Puerto Rico Manufacturers Association (PRMA) created an index to measure productivity on a ...
    • 3D Vibration Isolation Systems Modeling for Air Handling Units 

      Aponte Rivera, Alfredo (Polytechnic University of Puerto Rico, 2014)
      Spring isolators systems are commonly used in a variety of ways in today’s construction industry. They are an essential part of the design of many mechanical systems that are in need of absorbing and dissipating unwanted ...
    • 49 

      Martínez, Jan (Polytechnic University of Puerto Rico, 2018)
      Poesía: ¿Cuándo te dijeron sé Qué sentiste mientras te ungías, Mientras te tragabas el celeste De todos los universos? ¿Qué hiciste cuándo te llegó el azul, La rosa de los vientos, la estrella polar, El astro para ...
    • Acerca de “La virgen de los boleros” 

      Rabelo, José (Polytechnic University of Puerto Rico, 2016)
      La virgen de los boleros (Isla Negra, 2015) es la nueva colección de cuentos del escritor puertorriqueño, radicado en California, Jorge Luis Castillo. La variedad de temáticas, personajes y situaciones enriquecen el ...
    • Aero Repairs Documentation Cycle Time Reduction By Lean Application 

      Negron Rivera, David A. (Polytechnic University of Puerto Rico, 2014)
      In our daily life and world, with a diversity of industries and services, from health to manufacturing, all kind of products; many of them care apply Lean concepts or tools to perform important improvements to their ...
    • Aircraft Wing Spanwise Air-Load Distribution using MATLAB 

      Holguino Borda, Jonathan (Polytechnic University of Puerto Rico, 2014)
      Aircraft design is a complex task that involves the interaction between aerodynamics, propulsion, flight mechanics and structures. In particular, the structural design tasks involve the consideration of a significant ...
    • Airfoil Design Using Blade Element Momentum Theory 

      Lobeto Sanfeliz, Rodrigo (Polytechnic University of Puerto Rico, 2015)
      A wind turbine is a device designed to extract kinetic energy from the wind and convert it to mechanical energy, which in turn can be equivalent to electric power. On this work we will focus on the aerodynamics of wind ...
    • Algorithm for User-friendly Password Policy 

      Hernández Liang, Jorge (Polytechnic University of Puerto Rico, 2017)
      Password based security has become prevalent as the de facto measure against intrusion. Computer systems rarely focus on usability, and little research has been done to change the current, near universal method of ...
    • Alternativas para el Uso de Cenizas Volantes en Mezclas de Hormigón 

      Espiña Sánchez, Leonardo (Polytechnic University of Puerto Rico, 2015)
      Estudios demuestran que las cenizas volantes de carbón se pueden utilizar como uno de los componentes para la fabricación de estructuras de hormigón. Este proyecto pretende corroborar si las cenizas volantes de carbón ...
    • Alternatives for Processing Plastics with Recycle Codes from 3 to 7 

      Cuevas Colón, Bianka J. (Polytechnic University of Puerto Rico, 2019-08-19)
      Solid waste management represents a challenge for Puerto Rico. According to the Department of Natural and Environmental Resources (2019), more than half of the landfills have a closure order and only type one and two ...
    • American Sign Language Recognition using Electromyographic Signals via Myo Armband 

      Ramos González, Héctor A.; Vega, Anthony (Polytechnic University of Puerto Rico, 2018)
      Human and computer interaction has become an important tool in the 21 st century One of the most promising technologies for human/computer interaction is speech recognition ( which is a system composed of microphones, ...
    • Analysis & Evaluation of Costa Linda Condominium Applying New Codes for to Determine Retrofit Requirements for Stability 

      Jordan Marrero, Jorge M. (Polytechnic University of Puerto Rico, 2017)
      This study evaluate the capacity of a 10-story existing building designed in 1972 to determine its capacity to resist new loads according with present codes. A structural model was developed using a modern engineering ...
    • Analysis and Application of Maxwell's Equation for Induction Heating 

      Vázquez Ruiz, Eduardo (Polytechnic University of Puerto Rico, 2013)
      This article involves the development of the Maxwell equations considering a induction heating system. It is analyzed by computer program "Ansys Maxwell," to observe the development of the magnetic field. The system ...
    • Analysis and Characterization of the Condenser of a Small Scale Solar Air Conditioning Unit 

      Fuentes Meléndez, José A. (Polytechnic University of Puerto Rico, 2012)
      Abstract - This work is intended to show the characterization of a flat plate heat exchanger used as the condenser of a small scale solar air conditioning system and the recommendations for future studies. Also show flat ...
    • Analysis and Design of a Reinforced Concrete Multistory Office Building 

      Dávila González, Laureano (Polytechnic University of Puerto Rico, 2012)
      Abstract - The objective of this project is to analyze and design an existing old structure using actual codes and specifications, locating the structure in a seismic risk zone. This project performs a load analysis of the ...
    • Analysis of a Slope Failure in Los Canales Road in Carolina Puerto Rico after the Tropical Storm Irene 

      Castro Del Valle, Melissa (Polytechnic University of Puerto Rico, 2012)
      Abstract ⎯ Natural slopes are susceptible to instability due to different factors. This study investigates the factors that contributed to the Los Canales slope failure. The main factors that could contribute to the slope ...
    • Analysis of Alternatives for a Security Information and Event Management Tool in a Virtualized Environment 

      Sepúlveda Rodríguez, Roy A. (Polytechnic University of Puerto Rico, 2018)
      Security Information and Event Management is a software tool that increases the cyber-situational awareness of a system. Since many products are available in the market, there is a desire from companies and individuals ...
    • Analysis of Billboards Signs Collapse Due to Intensive Wind of Hurricane Maria 

      Santiago Caraballo, Ernesto J. (Polytechnic University of Puerto Rico, 2018)
      In Structural Analysis the collapse of different structures always will depend on factors such as the loads, dimensions and material used for building the structure. Billboards signs are commonly used by the outdoor ...
    • Analysis of Estimated Scour vs Inspected Scour on a Bridge after Hurricane Maria, and their Impact on the Puerto Rico Bridge Program 

      Berríos Soto, Christian (Polytechnic University of Puerto Rico, 2018)
      Bridge scour is considered the main reason for bridge failures due to the holes that can form and compromise the structure stability. Federal regulations require all proposed bridges to be designed for scour resistance and ...
    • Analysis of Surface Electromyography Signals of the Arm in Adults 

      Colón, José E. (Polytechnic University of Puerto Rico, 2020-11-13)
      In human history, medicine has always sought to improve the quality of life of patients with disabilities by designing what is now known as either an assistive device or prosthesis For a person who has an amputated arm, ...