PEDIATRIC APPENDICITIS: AGE DOES MAKE A DIFFERENCE.

Objective: To investigate the influence of patient age on the diagnosis and management of appendicitis, as well as to evaluate the rate of complications according to the age group.

Methods: We undertook a retrospective analysis of 1,736 children who underwent laparoscopic appendectomy in our center between January 2000 and December 2013. Patients were divided in groups taken into account their age: group A were infants, group B were preschoolers, group C were those ones older than five years old, and group D were those ones younger than five years old.

SIVEH: numerical computing simulation of wireless energy-harvesting sensor nodes.

The paper presents a numerical energy harvesting model for sensor nodes, SIVEH (Simulator I-V for EH), based on I-V hardware tracking. I-V tracking is demonstrated to be more accurate than traditional energy modeling techniques when some of the components present different power dissipation at either different operating voltages or drawn currents. SIVEH numerical computing allows fast simulation of long periods of time-days, weeks, months or years-using real solar radiation curves.

[Spleen injuries in Spain: at what point are we?].

Introduction: Management of spleen trauma has changed over last decades, although there is no data on its treatment in Spain. The aim of this study is to determine the characteristics of spleen injuries in adults with severe abdominal injuries and how we manage them.

Methods: A prospective study using the databases of six Spanish hospitals: Gregorio Marañón Hospital, Virgen de la Vega Hospital, Torrevieja Hospital, Getafe Hospital, Doce de Octubre Hospital and Corporació Sanitària Parc Taulí.

An ultra-low power and flexible acoustic modem design to develop energy-efficient underwater sensor networks.

This paper is focused on the description of the physical layer of a new acoustic modem called ITACA. The modem architecture includes as a major novelty an ultra-low power asynchronous wake-up system implementation for underwater acoustic transmission that is based on a low-cost off-the-shelf RFID peripheral integrated circuit. This feature enables a reduced power dissipation of 10 μW in stand-by mode and registers very low power values during reception and transmission.