Juan Rendón

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The General Packet Radio Service (GPRS) system will offer to the users an easy access to Internet applications which work with the TCP protocol. We analyse by means of simulations the performance in the GPRS network of the following wireless TCP proposals that use a proxy server: the Snoop protocol and the Split mechanism. We also describe the impact of the(More)
† The views expressed in this paper are those of the author and do not necessarily reflect the views of WIK-Consult 2 Abstract Countries in Latin America have lagged behind much of the world in telephone lines, but they have made up this gap through cellular networks. The limited wired infrastructure means that broadband access will more likely be achieved(More)
Mitochondrial thioredoxin-glutathione reductase was purified from larval Taenia crassiceps (cysticerci). The preparation showed NADPH-dependent reductase activity with either thioredoxin or GSSG, and was able to perform thiol/disulfide exchange reactions. At 25 degrees C specific activities were 437 +/- 27 mU mg(-1) and 840 +/- 49 mU mg(-1) with thioredoxin(More)
Arthrobotrys musiformis is a nematophagous fungus with potential for the biological control of Haemonchus contortus larvae. This study aimed to identify and demonstrate the proteolytic activity of extracellular products from A musiformis cultured in a liquid medium against H contortus infective larvae. A musiformis was cultured on a solid medium and further(More)
GPRS extends the widely deployed GSM system with a more efficient wireless Internet access. In this paper we investigate how a TCP transmission over GPRS is affected when it loses all its resources due to preemption by circuit-switched calls with higher priority. The results indicate that TCP performance is degraded more than necessary, as buffered data is(More)
Prioritisation based on traffic class is widely used within radio resource control strategies to provide quality of service (QoS) assurances in 3G wireless systems. Under high load conditions, traffic prioritisation can lead to situations where, momentarily, most of the radio resources are assigned to delay-constrained connections (e.g. conversational(More)
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