This paper proposes a continuous inspection method to assess the journey safety applied to aerial cable vehicles of mass transportation;a type of detachable gondola liftin terms of commercial operation in an urban area, specifically referring to the device coupling assembly on the track rope. The inspection method has been developed on the basis of a continual measurement process of the recorded strain conditions on a principal component of the coupling assembly. The selected component is commonly referred to as moving jaw. The proposed inspection procedure is structured based on the following set of consecutive stages: (i) Downloaded by [Simon Fraser University] at 02:56 17 March 2015 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 characterization of the load states generated by the commercial operation of the system; (ii) definition of the sections of greater sensitivity to the strains caused by the load states, by means of Finite Elements; (iii) development of a measurement system; (iv) calibration of the measuring system with controlled tests; and (v) implementation and continuous records data in commercial operation.
Este artículo presenta el resultado de varias investigaciones relacionadas con el desarrollo de tecnología aplicada al diseño y la fabricación de máquinas CNC (control numérico por computador) para corte de tendidos de tela, destinadas a pequeños talleres de confección. El desarrollo responde a la necesidad de la industria de acceder a máquinas de producción fraccionada de bajos costos de operación. Desde diversos puntos de vista la solución encontrada presenta factores novedosos. El primero de ellos, la inversión de la dinámica de los tendidos de tela. Otro involucra el actuador de corte, el cual no se construyó a la medida de la máquina, sino que fue el resultado de un diseño para habilitar actuadores comerciales utilizados en el proceso manual. El equipo recibió el software CAD/CAM de otras investigaciones del mismo grupo. La máquina, por sus innovaciones, recibió derechos de la oficina de patentes de Colombia.
This article describes the implementation of a novel method for detection and continuation of bifurcations in non-smooth complex dynamic systems. The method is an alternative to existing ones for the follow-up of associated phenomena, precisely in the circumstances in which the traditional ones have limitations (simultaneous impact, Filippov and first derivative discontinuities and multiple discontinuous boundaries). The topology of cycles in non-smooth systems is determined by a group of ordered segments and points of different regions and their boundaries. In this article, we compare the limit cycles of non-smooth systems against the sequences of elements, in order to find patterns. To achieve this goal, a method was used, which characterizes and records the elements comprising the cycles in the order that they appear during the integration process. The characterization discriminates: a) types of points and segments; b) direction of sliding segments; and c) regions or discontinuity boundaries to which each element belongs. When a change takes place in the value of a parameter of a system, our comparison method is an alternative to determine topological changes and hence bifurcations and associated phenomena. This comparison has been tested in systems with discontinuities of three types: 1) impact; 2) Filippov and 3) first derivative discontinuities. By coding well-known cycles as sequences of elements, an initial comparison database was built. Our comparison method offers a convenient approach for large systems with more than two regions and more than two sliding segments.
El aborto séptico constituye en la actualidad un problema médico, social y económico a nivel mundial debido a la gran demanda de casos, los elevados costos y las tasas de morbimortalidad materna. La Federación Internacional de Planificación Familiar calcula que cada año ocurren 5 millones de abortos inducidos; igualmente, en un estudio realizado en Colombia en 1990 se informaron 4.930 abortos en un período de 6 meses. El presente estudio es de tipo descriptivo retrospectivo, de corte transversal, llevado a cabo en el Departamento de Ginecología y Obstetricia del Hospital San Vicente de Paúl (HSVP)- Universidad de Antioquia, entre el 1º de octubre de 1997 y el 10 de marzo de 1998; en él se tuvieron en cuenta todas las pacientes que consultaron al HSVP entre el 1º de enero de 1994 y el 31 de diciembre de 1997. Se encontró que el grupo de edad más afectado fue el comprendido entre los 16-25 años, correspondiendo la mayor población a solteras y amas de casa. La gran mayoría de las pacientes eran multigestantes y la principal complicación fue el shock séptico.
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