Xavier Roset, Montserrat Carbonell, Antoni Mànuel, Spartacus Gomáriz
SEA SEISMOMETER COUPLING ON THE SEDIMENT

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 sediment sea without using a detailed model of interaction sensor/seabed.

Marcantonio Catelani, Valeria L Scarano, Francesco Bertocci, Roberto Singuaroli
COMPARISON BETWEEN THERMAL PERFORMANCE OF SILVER CONDUCTIVE ADHESIVE AND Sn-Ag-Cu SOLDER JOINTS IN A MEDICAL ULTRASOUND ARRAY TRANSDUCER

The RoHS and WEEE European Directive, recently introduced, represent focal points for the environmental regulation in the field of electronics industry. While removal of some material of concern has been relatively straightforward, the reduction or quite elimination of Lead (Pb) has caused significant disruption to the electronics manufacturing supply chain. This materials and technological conversion will increase the risk for premature product failures and degraded performances. As known, the Sn-Pb solder joint has over 50 years of manufacturing, field experience and knowledge; the Pb-free solution, instead, needs accurate studies voted both the characterization of performances and electronic properties of material. To this aim the paper presents preliminary results about new materials for soldering process and, in particular, a comparison between silver conductive adhesive and Sn-Ag-Cu (SAC). As an application, a medical ultrasound array transducer with new soldering materials, between a platelet of piezoelectric and fingers, brass micro-connections between the substrate of piezoelectric material and the printed circuit, is also presented in the paper. Factors, which influence the soldering process, like the thickness of soldering and the polymerization or reflow temperature, the duration of the process, are taken into consideration in order to realise samples for the experimental tests. In order to verify the samples behaviour under thermal stresses, measurements of electrical resistance, parameter chosen like failure pointer, were carried out.

Lorenzo Ciani, Marcantonio Catelani, Lorenzo Veltroni
SINGLE EVENT UPSET (SEU): DIAGNOSTIC AND ERROR CORRECTION SYSTEM FOR AVIONCS DEVICE

In aerospace applications, Commercial-Off-The-Shelf (COTS) Field programmable Gate Array (FPGA) is becoming increasingly attractive by offering low-cost solutions, simplicity and flexibility.
This research faces the problem of disturbance induced by high energy particles on electronic devices. Based on detailed analysis of this phenomenon, the work is divided into two parts: in the first part evaluation of effects of the Single Event Upset (SEU) has been carried out with the aim of determining diagnostic techniques and the mitigation of this disturbance, taking into account the fact that testing is one of the fundamental points in electronic programmable devices; in the second part a fault tolerant technique has been devised so as to achieve the requirements demanded on a real avionic system.

Gregor Geršak, Irena Nancovska Šerbec, Valentin Batagelj, Janko Drnovšek
CONCEPT OF PERSONALISED BIOMEDICAL INSTRUMENTATION; CASE STUDY - BLOOD PRESSURE

In this paper we are introducing the concept of personal instrumentation. Personal instrumentation stands for a measuring device, which includes also calculative algorithms and measuring methods and techniques, which along measuring of physiological parameters enable also collecting other types of data for a certain patient in a certain condition at a certain time. Therefore such devices would be a useful tool for the physician to better diagnostically evaluate the state the patient is in, and that in a holistic manner. The evaluation of the concept of personalised instrumentation is discussed in the field of non-invasive blood pressure measurements.
The majority of nowadays home-use, GP and clinical practice non-invasive blood pressure (NIBP) measurement devices use the oscillometric principle of measurement. In this paper we are discussing and describing an oscillometric device including also other forms of collecting data. Its aim is to produce correction factors, which would enable calculative corrections of the measured systolic and diastolic blood pressure levels to better suit the patient current status.

Septimiu Crisan, Ioan Gavril Tarnovan, Bogdan Tebrean, Titus Eduard Crisan
CORELLATION OF NEAR AND FAR INFRARED VEIN RECOGNITION FOR UNIFIED PROCESSING AND SIMULATION

Near infrared radiation has been successfully used in scanning vein patterns for biometric applications. While the method has been proven as highly reliable, few studies have been conducted using medium or far infrared radiation to assess the viability of a biometric scanning technique based on different wavelengths. With the constant decrease in prices for thermographic devices, the goal of this research was to determine if far infrared radiation is suitable for vein detection and to develop techniques for image processing and parameter extraction. Efforts have been made to integrate both methods (near and far infrared) in order to unify the data processing algorithms for real acquisitions and to provide enough information for performing visual reconstruction of blood vessels in simulation and database generating applications.