9762 papers found
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.
In this paper we present the novel implementation of the intrabody communication (IBC) system that was specially designed for electromyography (EMG) measurements in kinesiology, sports medicine and rehabilitation. We propose a novel approach to the wireless EMG monitoring system design, which prolongs the battery life by minimizing the power consumption requirements for data transmission. This goal was achieved by a capacitive IBC approach and by developing special-purpose ultra-low power hardware modules, which perform tasks of digital signal modulation and demodulation at a very low-level....
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...
The non-traditional method for the soil status and its change monitoring was used. The method is electrical impedance spectrometry (below EIS), which is developed within the Europe international project E!3838 of EUREKA program. EIS monitors electrical impedance in complex form and its changes caused by the load of the environment or construction by water. For this work was developed and realized unique apparatus Z-meter with 128 monitoring channels. Using the EIS method, progress of water infiltration and deformations outside or inside of the dike body can be indicated.
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...
One of priorities in research undertaken to support Food Composition Analysis was the production of a range of reference materials relevant to determine nutrients in selected foods. This paper describes the implementation and outcomes of activities on reference material production program and their contribution to international developments in the harmonization of Quality System of Food Composition Databanks. In order to enhance the quality assurance of analytical result. Infant formula as food matrix was evaluated to check for the suitability as quality control matrices for the analysis...
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...
This paper proposes an eddy-current non-destructive weld testing solution that uses a sensing probe including an excitation coil and a giant magneto-resistance sensor. The testing system control and the acquisition tasks are performed using a PXI system that includes a sinusoidal signal generator, a data acquisition module and a XY scanning stage control interface. For different positions of the sensing probe on the aluminum weld plane the eddy currents are detected and the acquired signals are processed. The signal processing is based on the LabVIEW tone measurement function in order to...
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...
NIRS (Near Infrared Spectrophotometry) is a non-invasive optical method for continuous measurement of tissue oxygenation and hemodynamic, which can be observed as relative changes in the concentration of haemoglobin in the blood and thus indirectly the oxygen content in the blood, ie tissue oxygenation. In our experiment, we wanted to determine the practical limitations of NIRS method and correlation with an increase in muscle activity in the case of isometric muscle contraction (m. tibialis anterior). Simultaneously a more commonly used EMG (electromyography) method was employed. EMG is a...