Now showing items 16-35 of 276

    • Banco de pruebas de relés 

      Figueroa, Heriberto (Polytechnic University of Puerto Rico, 1993-12)
      Description of a test bench that simulates the operation of the protection system of a transmission center. The test bench developed integrates several electromagnetic devices, known as relays, that work together to protect ...
    • Basic Plasma Diagnostics: Probes and Analyzers 

      Leal Quirós, Edbertho; González Lizardo, Ángel E. (Polytechnic University of Puerto Rico, 2008)
      What is plasma? Plasma is the fourth state of matter. Plasma are conductive assemblies of charged particles, neutrals and fields that exhibit collective effects. Plasma is profoundly influenced by the electrical interaction ...
    • Bibliografía selecta: Recursos de información en Ciencias Geomáticas 

      Grajales Suárez, Maritza (Polytechnic University of Puerto Rico, 2006)
      La diseminación de la información es una de las razones de porqué el conocimiento ha adelantado tanto desde la segunda mitad del siglo XX. En este siglo se multiplicará de tal forma que es imposible sospechar los niveles ...
    • Breve relato de la historia de los programas de Bachillerato en Agrimensura en Puerto Rico 

      Negrón, Jenaro R. (Polytechnic University of Puerto Rico, 2006)
      Discurso editado, presentado por el Profesor Jenaro R. Negrón el 21 de febrero de 2006 en el Cuadragésimo Aniversario del Programa de Agrimensura de la Universidad Politécnica de Puerto Rico.
    • Bridges under dynamic loads: comparison between finite element analysis and experimental results 

      Tito Izquierdo, Jorge A.; Rodríguez Agrait, Leandro (Polytechnic University of Puerto Rico, 1997-06)
      AASHO Road Test performed experimental tests on bridges under dynamic and static truck loads. This paper shows a comparison between AASHO's tests and the analytical results of UPR-PAVI2, a computer program developed by the ...
    • Capstone Design Project Interface Board for the HC12 Microprocessor 

      Farah Hilou, Shady; Badillo Oquendo, José A. (Polytechnic University of Puerto Rico, 2000-06)
      This project consists of the design and implementation of an interface board for the Motorola evaluation board M68HC12B32EVB. This interface will include eight different experiment for a laboratory course.
    • Capstone Design Project Stock Keeping Units Allocation for ICI Paints 

      Burgos Báez, Joel; González Aponte, Nancy; Vigo Avila, Luis (Polytechnic University of Puerto Rico, 2000-06)
      As part of our Capstone Design Project we will design the SKU (Stock Keeping Units) allocation system for the Imperial Chemical Industries (ICI) Paints Royal Warehouse located in Barrio Palmas, Catano. In the manufacturing ...
    • Cálculo de los coeficientes de la ecuación de pérdidas para un sistema de generación de potencia 

      Ruiz, Fernando; Santos, José A. (Polytechnic University of Puerto Rico, 1995-06)
      Calculation of the loss equation coefficients (Bmn) for a power generation system Engineering has been very successful in the analysis of fuel costs, performance and efficiency of boilers, turbines, and generators. However, ...
    • Changing Behaviors: Re - Conceptualization of a Tutoring Center 

      Miranda, Iris (Polytechnic University of Puerto Rico, 2004)
      The following article introduces a novel constructivist tutoring system, its origins, concepts, methods and its impact in the student population. To optimize the performance and strategic planning of the Center, a software ...
    • Classification of nr-graphs 

      Sarmiento, Jorge (Polytechnic University of Puerto Rico, 1997-06)
      When all possible r-gons are inscribed in an n-gon, the resulting n-graph falls into one of the following three categories: s-regular (sr or strongly regular), //-regular, or regular (k-regular). The definitions and necessary ...
    • Coeficientes de utilización de disyuntores ("breaker duty") 

      Orama Exclusa, Lionel R.; Torres Vincenty, Lygia M. (Polytechnic University of Puerto Rico, 1993-06)
      The breaker duty calculation is very important to the electric industry cause it shows which breakers overload under fault conditions. This way e utility determine the the extra capacity to add to those breakers or Aether ...
    • Colapso de un muro de contención construido con mampostería 

      Díaz Vázquez, Clariluz; Tito Izquierdo, Jorge A. (Polytechnic University of Puerto Rico, 1997-06)
      This study presents the analysis of a masonry retaining wall, typically built in Puerto Rico to stabilize and retain slopes. How safe and well built are these walls?. Have they the adequate resistance to efficiently retain ...
    • Comparison of the Quality System Requirements of Code of Federal Regulations Part 820 and International Standard ISO 13485 

      Figueroa, Yazmín (Polytechnic University of Puerto Rico, 2010)
      This paper compares the quality system requirements of the Code of Federal Regulations 21 CFR part 820 with the quality system requirements of the International Standard ISO 13485. The medical devices industry that distributes ...
    • Compendio sobre diseño de plantas de tratamiento de aguas negras 

      Tejada Ríos, Pedro J. (Polytechnic University of Puerto Rico, 1993-06)
      This article presents the essential considerations for designing wastewater treatment plants. It also introduces a computer program to design wastewater treatment plants. The author used Basic to develop this program, which ...
    • Comprensión del Lenguaje Natural e Integración de Asistente Virtual para el manejo de cuentas y comercios 

      Sierra Rivera, Wilfredo (Polytechnic University of Puerto Rico, 2022)
      En Puerto Rico, las compañías no han explorado la posibilidad de incorporar el uso de un Asistente Virtual para manejar transacciones comerciales. En búsqueda de facilitar la interacción de un usuario con una aplicación ...
    • Con la piel de lo que falta. 

      Santos-Febres, Mayra (Polytechnic University of Puerto Rico, 2014)
      Poesía de Mayra Santos-Febres: Con la piel de lo que falta.
    • Configuraciones proyectivas ortomodulares y retículos cúbicos 

      Sarmiento, Jorge (Polytechnic University of Puerto Rico, 1995-12)
      Orthomodular projective configurations and cubic lattices The author shows the construction of a cubic, connected, orthomodular attice of height 3, from a connected, orthomodular, projective configuration and gives the ...
    • Conforte con acondicionamiento de aire 

      Vélez Delgado, Gilberto A. (Polytechnic University of Puerto Rico, 1991-06)
      Recorrido por toda la superficie terrestre cubriendo los cuatro cabos de la tierra para observar las caracteristicas ambientales que dominan en regiones particulares.
    • Control por "feedback" y "feedforward" aplicado a un proceso de múltiples entradas 

      García Cabrera, Luis I. (Polytechnic University of Puerto Rico, 1994-12)
      Feedback and feedforward control applied to a multivariable process In this paper we analyze three control systems for a multivariable chemical process. We also present the design of a feedback control system, a feedforward ...
    • Cryptography and Steganography: Security in Electronic Transactions 

      Barbosa, Angel O.; Acevedo, Idelfonso; Rodríguez, Janneth; Shehadeh, Abed; Cruz, Alfredo (Polytechnic University of Puerto Rico, 2000-12)
      A new use for two ancient arts and sciences; Cryptography and Steganography are now as useful as they were thousands of years ago. The digital communication security rests mainly on the developments of these two methodologies ...