A. Linsangan Manuel

Learn More
Artificial reef areas can be used for management and conservation of commercially exploited crustacean decapods but their behaviour in these environments is poorly characterised. Acoustic tags were used to study the behaviour of 3 adult spiny lobsters (Palinurus mauritanicus) and 3 adult spider crabs (Maja squinado) over a period of 64 days in summer,(More)
The Norway lobster, Nephrops norvegicus (L.), is a deep-water burrowing decapod of high commercial value. Diel variations in trawl captures are produced by population rhythms of burrow emergences related to day-night cycles. Rhythms seem to be different in males and females since catches show variations in sex ratios depending on the season. Our hypothesis(More)
Abstrac t This paper proposes an energy-efficient time synchronization scheme for Wireless Sensor Networks (WSNs) based on the IEEE 1588 standard. Although a number of methods have been studied for time synchronization of WSNs, some applications require high precision time synchronization with very low power consumption. This paper presents a reduced(More)
The reduced power requirements of miniaturized electronics offer the opportunity to create devices having their power supply based on energy harvesters. In this paper a new idea is proposed and studied to supply underwater lowconsumption devices using low-cost disk piezoelectric elements. The system scavenges energy from water motion induced in depth by(More)
− Marine Sensor Networks (MSN) and ocean observatories are complex data acquisition systems where in many cases, synchronized acquisition is needed between the different networked nodes. In the development of OBSEA project, (EMSO CAC-2007-09) [1] distributed acquisitions nodes based in low power embedded systems have to be synchronized. This paper presents(More)
− We can obtain the performance of the marine seismometer upon the sediment to know its coupling in the bottom sea. This paper deals with the coupling parameters in order to obtain the geophone response through the frequency. The use of the shake table and vibration calibrator allows to deduce the coupling transfer function between the geophone and the(More)
A wireless sensor system was used to monitor carbon monoxide and smoke air pollutants. A MATLB curve fitting toolbox was used to read both CO and smoke readings with a single sensor (MQ2). The system have an HTML-based interface developed in MATLAB software for displaying the pollutants level in parts per million gathered by the commercially available(More)
Currently, there is a lag in the proliferation of underwater sensors due to the lack of low cost acoustic transmitters. The high cost of acoustic modems and some of their characteristics, make them inappropriate for many scenarios where low power and short range communications are required. This paper presents the design and the details of a low-cost(More)
This work shows a linearization for a AUV-Cormoran dynamic mathematical model with the aim of designing linear controllers for trajectory control. The model is developed under 3 degrees of freedom and the whole system has been simulated in Matlab Simulink environment. The linearization model is based on understanding the dynamics of the vehicle under(More)
An acquisition system has been developed as an evolution of the gDT316 and gCNT16 dataloggers [1]. This new datalogger, gDT524, has several advantages in comparison with the previous versions. The main features, beside the low power consumption and low cost, are: an A/D converter with 24 bits fivechannels inputs, two 16 bits counters, meteorological(More)