A parallel study, between wind profiles until 300m measured in experimental sites at Tyrrhenian Sea and at Black Sea we realize in order to investigate how the variation of wind flow influences meteorological parameter on coastal sites. The data set available made possible a key study of the influence of different wind regimes in the two sites. In particular it was possible to select days with different wind regime: one with well-developed breeze regime, one with not well developed breeze regime and the last one with uncompleted sea breeze. The stability classification in the three days was studied using two sonic anemometer at frequency of 10 Hz placed at 10 m and in operation simultaneously in both coastal sites. Finally this last data were compared with SAR (Synthetic Aperture Radar) wind obtaining a good correlation and demonstrating that it is possible use the satellite data for wind resource estimation.

In this paper the authors describe the structure of a wireless sensor node designed to measure height variations in coastal sand dunes. The paper focuses on the project and development of a sensing device able to measure the changes of height of sand dunes, based on an array of photoresistors (LDRs), designed to withstand the critical atmospheric conditions of coastal environments. Together with the sensing device, also a power control logic has been studied and developed, to reduce the power consumption leading to an ideal life time of the node of around two years. The sensor node is also provided with wireless communication capabilities based on the ZigBee communication protocol and is integrated in a network infrastructure for remote data collection.
The proposed sensor node, together with a minimal network architecture, has been developed and tested directly on the beach to prove its effectiveness. In this paper, the overall structure of the node is described, along with its operating principle and the functioning of the power control logic.

Water pollution is a serious problem affecting rivers, seas, oceans and natural water resources. Pollution can be caused by human activities or as undesired consequence of an incident or natural disaster. The prediction of the propagation direction of contamination could support the decontamination activities in order to be more effective. By considering the disastrous effects on fauna and flora, attention is paid on oily contaminants, such as petroleum and oils, in sea and ocean. Such contaminants can be even not-visible at naked eye.
In this paper, the authors describe a revised model to predict the wave propagation direction so to evaluate the pollutant propagation. The model is based on the directional wave analysis. A buoy network equipped with altimeters is used to measure the instantaneous sea surface elevation. Time series measurements are processed to evaluate the directional wave spectrum. Consequently, the propagation angle of wave, and therefore the pollutant propagation, is predicted. The measurement uncertainty contribution is computed in order to optimize the estimation of the wave propagation direction.

This report describes the results of a pneumatic pressure standards key comparison among nine SIM National Metrology Institutes in order to determine their degree of equivalence in the pressure range from 10 kPa to 120 kPa in gauge mode. The pilot laboratory was the Centro Nacional de Metrología (CENAM, Mexico). All participating institutes used pneumatic pressure balances as their pressure standard. The transfer standard was a complete system including a pressure balance with a free-deformational piston- cylinder assembly and a set of masses. Eleven participants completed their measurements, although, only nine laboratories reported the pressure-dependent effective areas of the transfer standard at specified pressures with the associated uncertainties. NRC/Canada and BSJ/Jamaica withdrew the comparison by not sending their measurements. The results of the eight laboratories that sent their results were linked to the CCM.P-K6 comparison through the reference values provided by NIST, USA. The degrees of equivalence were evaluated by the relative deviations of the participants' results from those obtained by NIST. The results of six participating NMIs agree with the NIST reference values within their expanded uncertainties (k =2) in the entire pressure range from 10 kPa to 120.

Fluke Calibration is accredited for gas flow measurements in the range of 0.1 sccm to 6000 slm in nitrogen and air. Traceability is maintained directly through a gravimetric flow standard but only recently from 1 to 10 sccm. The traceability of flow in the range of 0.1 to 1 sccm is based on extrapolation of the use of laminar flow elements below 1 sccm. This part of the range has never been completely verified through interlaboratory comparisons, proficiency testing or other means of measurement assurance. In an internal document from DH Instruments in the early 1990s it was suggested that a piston gauge could be used to gain traceability for very lows gas flows. In order to prove out traceability in this range an attempt was made to use a piston gauge using a piston-cylinder size of 35 mm diameter as a reference.
One of the reasons for choosing a piston gauge as a reference is its ability to control pressure. This is crucial when measuring gas flow through a laminar flow element (LFE) in this design and range. In addition, the effective area is known to within 0.001% leaving the vertical displacement of the piston to dominate the uncertainty of the dimensional part of the flow test. This was a challenge because the measurements needed to be made in absolute mode and the internal piston position sensor supplied with the piston gauge did not have sufficient precision. This paper describes the theory and design of the gas flow measurement system, the current results, and improvements needed or suggested. Two different designs are discussed, one with a single piston gauge as a reference and the possibility of two piston gauges measuring flow on either side of the laminar flow element.
Note: sccm (standard cubic centimeters per minute) is an industry accepted alternative to kg/s [1]. It is used out of convenience to normalize flow rates of gases with significant differences in density.