A satellite navigation system to improve the management of intermodal drayage

The intermodal transport chain can become more efficient by means of a good organization of the drayage movements. Drayage in intermodal container terminals involves the pick up or delivery of containers at customer locations, and the main objective is normally the assignment of transportation tasks to the different vehicles, often with the presence of time windows. The literature shows some works on centralised drayage management, but most of them consider the problem only from a static and deterministic perspective, whereas the work we present here incorporates the knowledge of the real-time position of the vehicles, which permanently enables the planner to reassign tasks in case the problem conditions change. This exact knowledge of position of the vehicles is possible thanks to a geographic positioning system by satellite (GPS, Galileo, Glonass), and the results show that this additional data can be used to dynamically improve the solution

Dynamic approach to solve the daily drayage problem with travel time uncertainty

The intermodal transport chain can become more e cient by means of a good organization of drayage movements. Drayage in intermodal container terminals involves the pick up and delivery of containers at customer locations, and the main objective is normally the assignment of transportation tasks to the di erent vehicles, often with the presence of time windows. This scheduling has traditionally been done once a day and, under these conditions, any unexpected event could cause timetable delays. We propose to use the real-time knowledge about vehicle position to solve this problem, which permanently allows the planner to reassign tasks in case the problem conditions change. This exact knowledge of the position of the vehicles is possible using a geographic positioning system by satellite (GPS, Galileo, Glonass), and the results show that this additional data can be used to dynamically improve the solution

El hallazgo de moneda califal de Fontanar (Córdoba)

Análisis del hallazgo de dírhams califales aparecidos en el Fontanar, en los arrabales occidentales de Córdoba.This text deals witn the analysis of dirhams from the Caliphate age found in El Fontanar, in the western outskirts of Córdoba

Gradings on simple real Lie algebras

Español: Esta obra es una tesis doctoral en matemáticas por compendio de cuatro artículos. Aquí explicamos, utilizando un lenguaje lo más sencillo posible, los resultados alcanzados en esos artículos. El objetivo general esla clasificación de las graduaciones en las álgebras de Lie reales simples. El texto está escrito tanto en inglés como en español. Este documento se puede descargar desde la siguiente dirección web: https://arxiv.org/abs/1806.06115English: This work is a doctoral thesis in mathematics by compendium of four articles. Here we explain, using a language as simple as possible, the results achieved in those articles. The general objective is the classification of gradings on simple real Lie algebras. The text is written in both english and spanish. This document can be downloaded from the following web address: https://arxiv.org/abs/1806.06115<br /

Architectural geo-E-learning: geolocated teaching in urban environments with mobile devices: a case study and work in progress

Postprint (published version