Planificación de la integración puerto-ciudad: caso de Vigo

Proyectar la ordenación urbanística y arquitectónica del área de un puerto debe incluir muchas variables, ha de estar en armonía con su entorno y su evolución histórica, como clave del éxito en su integración. El presente artículo explica los elementos que han de tenerse en cuenta a la hora de afrontar una planificación de este tipo mediante la descripción de la propuesta presentada para el ?Concurso público internacional de ideas para proyectar la ordenación urbanística y arquitectónica del área central del puerto de Vigo?, con el ánimo de compartir la filosofía de diseño integral aplicada, que sirva de inspiración y ayuda a futuros diseñadores. La fantasía creativa es un gran valor añadido a las creaciones ingenieriles, pero no debe apabullar la funcionalidad ni la sostenibilidad, sino estar en armonía con éstas. La máxima expresión estética en la ingeniería se alcanza como el producto de la elegancia conceptual de la funcionalidad de las estructuras.

Self-positioning and mapping of rectangular rooms with sectorized narrowband antennas

A system for simultaneous 2D estimation of rectangular room and transceiver localization is proposed. The system is based on two radio transceivers, both capable of full duplex operations (simultaneous transmission and reception). This property enables measurements of channel impulse response (CIR) at the same place the signal is transmitted (generated), commonly known as self-to-self CIR. Another novelty of the proposed system is the spatial CIR discrimination that is possible with the receiver antenna design which consists of eight sectorized antennas with 45° aperture in the horizontal plane and total coverage equal to the isotropic one. The dimensions of a rectangular room are reconstructed directly from spatial radio impulse responses by extracting the information regarding round trip time (RTT). Using radar approach estimation of walls and corners positions is derived. Tests using measured data were performed, and the simulation results confirm the feasibility of the approach.

SLBN: A Scalable Max-min Fair Algorithm for Rate-Based Explicit Congestion Control

The growth of the Internet has increased the need for scalable congestion control mechanisms in high speed networks. In this context, we propose a rate-based explicit congestion control mechanism with which the sources are provided with the rate at which they can transmit. These rates are computed with a distributed max-min fair algorithm, SLBN. The novelty of SLBN is that it combines two interesting features not simultaneously present in existing proposals: scalability and fast convergence to the max-min fair rates, even under high session churn. SLBN is scalable because routers only maintain a constant amount of state information (only three integer variables per link) and only incur a constant amount of computation per protocol packet, independently of the number of sessions that cross the router. Additionally, SLBN does not require processing any data packet, and it converges independently of sessions' RTT. Finally, by design, the protocol is conservative when assigning rates, even in the presence of high churn, which helps preventing link overshoots in transient periods. We claim that, with all these features, our mechanism is a good candidate to be used in real deployments.