Revista Politechnê: Recent submissions

Now showing items 201-220 of 302

    • The development of my capstone design project 

      Benero García, Héctor Rafael (Polytechnic University of Puerto Rico, 1995-06)
      This article is the result of my Capstone Design Project, which I started during the summer of 1994. The main purpose of this course is to expose us to the ever changing and challenging world of the engineering design work. ...

    • Retículos cúbicos, ortomodulares, conexos, de altura 3 y configuraciones proyectivas ortomodulares conexas 

      Sarmiento, Jorge (Polytechnic University of Puerto Rico, 1994-12)
      Cubic orthomodular connected lattices of height 3 and orthomodular connected projective configurations The construction of a connected orthomodular projective configuration, from a cubic, connected, orthomodular lattice ...

    • Identifying damage in reciprocating air compressors 

      González, Cándido; Monroig, Julio H. (Polytechnic University of Puerto Rico, 1994-12)
      We used a parametric analysis for a reciprocating air compressor to determine its working conditions. We also connected measuring devises which allowed us to determine the real performance of our compressor. From this point ...

    • Design of an experiment for injection blow molding 

      Moreno Abadía, Elver; Rivera Ruibal, Pilar (Polytechnic University of Puerto Rico, 1994-12)
      This research was requested by the quality control engineer of a company manufacturing plastics products such as bottles and caps. These products are manufactured with polyethylene and polipropylene resin, using two molding ...

    • Programa emulador de entrenador para los microprocesadores INTEL 8080 y 8085 para las calculadoras programables HP-48SX y HP-48GX 

      Zapata Cancel, Luis A (Polytechnic University of Puerto Rico, 1994-12)
      Emulator of a trainer for the Intel microprocessor 8080 and 8085 for the programmable calculator HP-48SX and HP-48GX This article presents the development of a program to emulate the Intel 8080 and 8085 microprocessors. ...

    • 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 ...

    • Análisis del sistema de protección de IPR Pharmaceuticals, Inc 

      Flores Nieves, Ramon H.; Pérez Dumeng, Luis A. (Polytechnic University of Puerto Rico, 1994-12)
      Analysis of the electrical protection system of IPR Pharmaceuticals This study is based on the electrical distribution system of a pharmaceutical plant. The purpose of the study is to investigate why the low voltage ...

    • Hadamard matrices, strongly regular graphs, and Galois fields 

      Sarmiento, Jorge (Polytechnic University of Puerto Rico, 1994-06)
      In this paper the author uses the concept of circulant matrices and the superposition principle to find, from the adjacency matrices of three regular graphs of order 8 and degree 2, tire adjacency matrix, M, of a strongly ...

    • Modelaje matemático y simulación computadorizada del enfriamiento natural de una vivienda en Puerto Rico 

      Bardález Alvarado, Manuel (Polytechnic University of Puerto Rico, 1994-06)
      The planning of social interest housing developed by the government of Puerto Rico during the sixties basically optimizes the economic aspects. Although, unfortunately, they shun a very important aspect in the intrinsic ...

    • Diseño de experimentos para una de las líneas de llenado y empaque en una industria farmacéutica local 

      Zavala, Tanya; Morales, Roxanna B (Polytechnic University of Puerto Rico, 1994-06)
      A local pharmaceutical company has to reduce the number of complaints from customers who receive its products in broken or cracked glass bottles. In this paper we discuss an experiment to establish parameters to guarantee ...

    • Simulación de estaciones de trabajo ergonómicamente diseñadas para inspeccionar lentes de contacto 

      Soto Santiago, Jannette; Díaz Suarez, Roberto (Polytechnic University of Puerto Rico, 1994-06)
      In this project we describe the ergonomic design of workstations for the inspection of contact lenses. MANNEQUIN, a simulation program, was used for the evaluation and proper design. The main objective of 111s project is ...

    • Método analítico para determinar concesiones y análisis de rendimiento 

      Pardo Rosado, Antonio; Pardo Rosado, Luis E. (Polytechnic University of Puerto Rico, 1994-06)
      We developed an analytical method to determine allowances and performance ratings based on human physiology. The theory about the human capacity to do work is analogous to the graph of steel fatigue used for structural ...

    • Diseño de experimentos con una máquina de revestimiento de tabletas en una industria farmacéutica 

      Montañez, Carmen; Moreno, Odalis (Polytechnic University of Puerto Rico, 1994-06)
      A subtle but meaningful kind of loss is the acceptance of subjective beliefs within an organization. Profits are never a result of mysticism. Subjectivity without a precise base is a way of lying and, although it might not ...

    • Diseño de un microprocesador 

      Sánchez Méndez, Maripura; Concepción AIvarez, Blanca (Polytechnic University of Puerto Rico, 1994-06)
      We show the design of a microprocessor that includes the set of instructions, the addressing modes and the cycle of fetch-decode-execute an instruction. We chose the registers used in the design from the board and then ...

    • A utility for Netware: REMOTE 

      García, Steven; Quintero, Jorge L. (Polytechnic University of Puerto Rico, 1994-06)
      We used the C language code to develop a utility that allows two or more workstations connected to the same physical network running the network operating system Netware to communicate and perform remote operations. The ...

    • Diseño computadorizado de la carga térmica para el acondicionamiento de aire en Puerto Rico (AIRPAK 123 TM) 

      Tirado, Alberto; López, Félix (Polytechnic University of Puerto Rico, 1993-12)
      A digital program to compute the industrial air conditioned load was designed. It took us over 3,000 hours to obtain a reliable product which excels all air conditioned programming standards known to this moment. The program ...

    • Theory of operation of today CD systems 

      García, Rafael; Trabanco, Benjamin R. (Polytechnic University of Puerto Rico, 1993-12)
      In this article we examine the main events that lead to the invention of the compact disc or CD, as we all call it. We consider the most important components of the playback section of the CD such as the pick-up circuit, ...

    • 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 ...

    • Pérdidas de agua en los sistemas fluviales 

      Díaz, Pedro; Quintero, Jorge (Polytechnic University of Puerto Rico, 1993-12)
      In this paper we identify those elements that contribute to the undetermined water losses in the Puerto Rico Water and Sewers Authority. We also provide detailed recommendations to reduce these losses.

    • The generalized cross-product of vectors 

      Deschapelles, Bernardo (Polytechnic University of Puerto Rico, 1993-12)
      The meaning of the scalar product of two vectors can be easily extended to a space of n dimensions. Similar generalization, related to the cross-product of vectors with more than three components, has not been formulated ...