José R. Gallardo

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Adrenomedullin is a peptide of marked vasodilator activity first isolated from human pheochromocytoma and subsequently demonstrated in other mammalian tissues. Using a polyclonal antiserum against human adrenomedullin-(22-52) amide and the avidin-biotin peroxidase complex technique, we have demonstrated by light and electron microscopy that(More)
Virtual environments (VEs) are interactive computer simulations that immerse users in an alternate reality. Distributed VE (DVE) applications simulate the experience of real-time interaction among multiple users in a shared three-dimensional (3-D) virtual world. In this paper, we identify the network service requirements for highly interactive DVEs and show(More)
The WAVE (Wireless Access in Vehicular Environments) concept includes seven channels within the DSRC band. One of them, known as the Control Channel (CCH), is the one used to exchange all safety-related messages. Messages sent over the CCH have to be processed with different priorities depending on how critical they are for vehicle safety. However, the MAC(More)
There are two essential ingredients for any telecommunications system to be able to provide quality-of-service (QoS) guarantees: admission control (CAC) and service differentiation. In wireless local area networks (WLANs), it is essential to carry out these functions at the MAC level. The original version of IEEE 802.11 medium access control (MAC) protocol(More)
Wireless networks for vehicular environments are gaining increasing importance due to their ability to provide a means for stations on the roadside and radio units on board of vehicles to communicate and share safety-related information, thus reducing the probability of accidents and increasing the efficiency of the transportation system. With this goal in(More)
as the wireless sensor network (WSN) technology evolves towards higher transmission rates, it makes sense to start considering sensing and transmission of real-time information, such as audio and video. These applications require quality of service (QoS) guarantees, not offered by current networks. The multi-hop nature of WSN makes QoS a challenging task.(More)
This paper evaluates three routing strategies for wireless sensor networks: source, shortest path, and hierarchical-geographical, which are the three most commonly employed by wireless ad-hoc and sensor networks algorithms. Source routing was selected because it does not require costly topology maintenance, while shortest path routing was chosen because of(More)