For heavy-duty vehicles and road transportation, fuel consumption and associated CO2 emissions have been of great concern, which
has led to the development and implementation of technologies to reduce their impact on the environment. Low viscosity engine oils
have arisen as one proven cost-effective solution to increase the engine efficiency; however, for the heavy-duty vehicle segment, engine
protection against wear is a priority for end-users, and therefore there is some reluctance to the use of that new oil formulations. In
this study, eight lubricant oils, representative of the HTHS viscosity reduction that heavy-duty oils have been undergoing and new API
CK-4 and FA-4 categories, were evaluated for fuel economy, oil performance and engine wear, in a long-term test involving a fleet of 49
heavy-duty vehicles of four different engine technologies, some of them with diesel fuel and others with compressed natural gas. Results
of fuel economy were positive for most of the buses’ models. Regarding oil performance and wear, most of the formulations were found
to be suitable for extended oil drain intervals (ODI); and although no alarming results were found, overall performance of the formulations of the fourth stage could lead to significant wear if the oil drain interval is extended. In this study, it should be noted that some of
the information has been presented by the authors in other publications, here they are presented with the purpose of complementing the
new results and summarize the entire test.
Attending the important role of maintenance function in any production or service provider company, the measurement and assessment of maintenance performance is crucial for competitiveness and future survival. That situation is even more critical in urban transport fleets where some specific boundary conditions and special characteristics will affect maintenance policy and implementation. This paper presents a deep review of different studies worldwide to define the most proper and effective maintenance performance indicators, selecting and refining the most important ones to obtain a reduced maintenance management balanced scorecard. That balanced scorecard is proposed as a main tool for urban transport fleet maintenance managers to assess efficiency and effectiveness of maintenance processes and will be used as a basis for a future benchmarking process for this type of companies.
Recibido: 13-11-2015, aprobado tras revisión: 24-11-2015. Forma sugerida de citación: Torres, R.; Sandoval-Noreña, F.; Martínez, V. (2015). "Emergency-route, evacuation route finder for emergency and rescue scenarios". Ingenius. N.• 14, (Julio-Diciembre). pp. 14-20. ISSN: 1390-650X.
Resumen AbstractCon el creciente ritmo de desarrollo de aplicaciones para dispositivos móviles se dispone de diversos sistemas de localización. El GPS es el de mayor utilización, permite conocer la ubicación actual de un dispositivo en cualquier momento, además, posibilita el desarrollo de soluciones para una interacción más cercana entre dos o más personas independientemente del entorno geográfico en el que se encuentren. Esta investigación permitió desarrollar una aplicación móvil basada en el sistema operativo Android, con la finalidad de ayudar a los usuarios en las tareas de evacuación en situaciones de emergencia, presentando una ruta de salida óptima desde la ubicación actual del usuario hacia la zona de evacuación más cercana. Las rutas son calculadas y transmitidas a los usuarios en relación con los obstáculos reportados y las zonas seguras establecidas.With the increasing pace of application development for mobile devices, several location systems are available, being GPS widely used, which allows to know the actual location of a device at any time, besides it makes it possible to develop solutions allowing a close interaction among two or more people regardless the geographical position they are. The present research allowed us to develop a mobile application based on Android OS, in order to help users evacuate at emergency situations, showing an optimal exit route from the actual location to the closest evacuation zone. Routes are calculated and transmitted to users based on reported obstacles and pre-established safety zones.Palabras clave: aplicaciones en red para desastres, escenarios de emergencia y rescate, redes móviles.
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