Now showing items 21-40 of 2144

    • Seismic Response of Single-Degree-of-Freedom (SDOF) Structural Fuse Systems 

      Vargas, Ramiro; Bruneau, Michel (2004)
      Passive energy dissipation (PED) devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) ...
    • Floor Response of SDOF Systems with Metallic Structural Fuses 

      Vargas, Ramiro (2004)
      The floor demands of Single-Degree-of-Freedom (SDOF) systems designed or retrofitted with metallic structural fuses are studied in this article. Floor velocity and acceleration are obtained and comparisons are made between ...
    • Robust Cascade Controller for Nonlinearly Actuated Biped Robots: Experimental Evaluation 

      Caballero, Rony; Armada, Manuel; Akinfiev, Teodor (2004)
      In this paper we consider the postural stability problem for nonlinearly actuated quasi-static biped robots, both with respect to the joint angular positions and also with reference to the gripping effect between the ...
    • Investigation of the Structural Fuse Concept 

      Vargas, Ramiro; Bruneau, Michel (2004)
      Passive energy dissipation (PED devices have been implemented to enhance structural performance by reducing seismically induced structural damage. In this paper metallic dampers are defined to be structural fuses (SF) when ...
    • Adding extra sensitivity to the SMART non‐linear actuator using sensor fusion 

      Montes Franceschi, Héctor; Caballero, Ronny; Armada, Manuel (Industrial Robot: The International Journal Of Robotics Research And Application, 2004-03-01)
      The prospect of using humanoid robots in practical applications attracts an important research effort and the latest steps forward in robot technology show many remarkable achievements where design aspects, control systems ...
    • Estado Actual del Mercado de Frutos y Vegetales Frescos Cortados en Panamá 

      Tejedor, Wedleys (2004-04-01)
      Uno de los principales problemas que confrontan las empresas dedicadas a la elaboración de frutos y vegetales frescos cortados en Panamá, es que no se han realizado estudios tendientes a establecer el tiempo de vida útil ...
    • Displays and Photonics Application Group Activities 

      Vázquez, Carmen; Sánchez Pena, José Manuel; Vargas, Salvador; Pérez, Isabel; Gonzalo, Ana Belen; montalvo, Julio (2004-06-01)
      Displays and Photonics Application Group (GDAF) is devoted to design and development of passive and active devices and sensors for their applications in WDM networks, CWDM, POF, and RF over fiber networks using different ...
    • A plastic fiber optic liquid level sensor 

      Vargas, Salvador; Vázquez, Carmen; Gonzalo, Ana Belen; Sánchez Pena, José Manuel (2004-06-09)
      A system for measuring liquid level in multiple tanks using optical fiber technology has been developed. Oil field service industry or any sector requiring liquid level measurements in inflammable atmospheres can be benefited ...
    • ROBOCLIMBER: Control System Architecture 

      Montes Franceschi, Héctor; Armada, Manuel; Nabulsi, Samir (2004-07-01)
      The paper shows the complete system architecture of a walking and climbing robot developed to make slope consolidation, where heavy duty equipment is employed for drilling up to 20m holes. ROBOCLIMBER a quadruped robot ...
    • Demultiplexers for ultranarrow channel spacing based on Mach-Zehnders and ring resonators 

      Vázquez, Carmen; Vargas, Salvador; Sánchez Pena, José Manuel; Gonzalo, Ana Belen (2004-09-01)
      Novel demultiplexer configurations based on concatenated Mach-Zehnders and a ring resonator are presented. These new devices exhibit high channel isolation, flexibility, no loss, and megahertz-adjustable full width at half ...
    • Time Division Multiplexing Fibre-Optic Liquid Level Sensors using a Nematic 1x2 Optical Switch 

      Vázquez, Carmen; Vargas, Salvador; Santos, José Luis; Sánchez Pena, José Manuel; montalvo, Julio (2004-09-01)
      In this paper, time division multiplexing with optical switches in a multi-sensor system for level measurements with POF is reported. POF are used in the sensor heads and as transmission media along the optical network. ...
    • Multi-sensor system using plastic optical fibers for intrinsically safe level measurements 

      Vargas, Salvador; montalvo, Julio; Gonzalo, Ana; Vázquez, Carmen (2004-10-04)
      A system for measuring liquid level in multiple tanks using optical fiber technology has been developed. Oil field service industry or any sector requiring liquid level measurements in flammable atmospheres can be benefited ...
    • Measuring contribution of infoplazas to internet penetration and use in Panama 

      Miller, Norma L. (2004-12)
      infoplazas arose in Panama as means to combat the digital gap by providing Internet connectivity to the economically disadvantaged and geographically remote. Yet there is a dearth of information regarding their actual ...
    • Effectiveness of natural antioxidants in sunflower oil 

      Carelli, Amalia A.; Franco, Indira C.; Crapiste, Guillermo H. (2005)
      The antioxidant activity of ∝- and δ-tocopherol, citric acid, ascorbic acid and ascorbyl palmitate was investigated in sunflower oil containing naturally occurring tocopherol. The effectiveness of natural antioxidants in ...
    • Seismic Response of Hybrid Systems with Metallic and Viscous Dampers 

      Vargas, Ramiro (2005)
      Metallic dampers can enhance structural performance by reducing seismically induced lateral displacements, and by reducing inelastic behavior of beams and columns. Limiting story drift also indirectly allows for mitigation ...
    • On the Design and Development of Climbing and Walking Robots for the Maritime Industries 

      Armada, Manuel; Prieto, M.; Akinfiev, T.; Fernández, Roemi; Montes Franceschi, Héctor (2005)
      Modern robotic systems are increasingly powerful in terms of sensor fusion and mobility. Present technological progress allows advanced robots to cope progressively much better also with complex environments such as those ...
    • HACCP: Una Herramienta Para la Industria de los Vegetales Frescos Cortados 

      Tejedor, Wedleys (2005-03-01)
      El sistema de Análisis de Peligros y Puntos Críticos de Control (HACCP, siglas en inglés) es un sistema de inocuidad alimentaria, diseñado para identificar y valorar peligros, establecer y vigilar controles para prevenir, ...
    • Applications of recirculating optical configurations on filters and lasers 

      Vázquez, Carmen; montalvo, Julio; Vargas, Salvador; Corredera, Pedro; Sánchez Pena, José Manuel (2005-07-07)
      In this paper, different optical configurations based on ring resonators and a reflective section in the feedback path, are proposed in order to show the feasibility of their applications in different fields. Additionally, ...
    • Sagnac loop in ring resonators for tunable optical filters 

      Vargas, Salvador; Vázquez, Carmen; Sánchez Pena, José Manuel (2005-08-01)
      General filter architecture using co-and counterpropagation signals are studied. A specific configuration based on a Sagnac loop within a ring resonator is analyzed. Novel tuning, apart from conventional tuning,is achieved ...
    • Robot Saltador y Procedimiento para su Control 

      Akinfiev, Teodor; Armada, Manuel; Fernández, Roemi; Montes Franceschi, Héctor (2005-10-01)
      Robot saltador para el movimiento en terrenos con obstáculos, que contiene al menos un resorte (4) con uno de sus extremos unido al cuerpo (1) del robot, y una cadena cinemática entre el motor (5) y el resorte (4) que ...