Leo Van Biesen, Zobeida Cisneros, Tesfa Ghebreegziabeber
ON THE APPLICATION OF THE POWER OF GIS TO ENVIRONMENTAL MEASUREMENTS FOR THE MONITORING, EXPLOITATION AND SUSTAINABLE ENVIRONMENTAL MANAGEMENT OF MARINE ECOSYSTEMS

Interest in sustainable environmental management of marine ecosystems is nowadays increasing rapidly as a result of the dramatic extending of man’s economic activity in the vicinity of coasts, estuaries and deeper waters of the shelf edge and continental slope. Therefore, one needs to model the marine environment by setting up measurement procedures for evaluating natural and human impacts, which requires an interdisciplinary approach on multiple levels in order to predict its evolution with respect to environmental protection and the conservation of natural resources.
Remotely sensed oceanographic measurements in conjunction with geographic information system (GIS) may be a useful tool for defining strategies, for the monitoring of marine ecosystems over time and space and for the efficient updating of the marine environmental information. The GIS in marine ecosystems enables to integrate all relevant multilayer, spatial and temporal data acquired from the investigated marine environment, viz. high resolution bathymetry, characterisation of seabed, sediments and near sub-bottom, and the capability to query and display information for monitoring effectiveness.
This paper will outline through two examples of the potential use and application of GIS in monitoring, exploitation and sustainable environmental management of marine ecosystems. Some obtained results validate the suitability of GIS for this purpose.

Stefano de Falco, Nicola Pasquino
A NEW APPROACH TO UNCERTAINTY REDUCTION IN ENVIRONMENTAL ELECTROMAGNETIC FIELD MEASUREMENTS THROUGH QUALITY ASSURANCE TECHNIQUES

Assessment of risks connected with exposure to electromagnetic fields at either low or radio frequencies requires appropriate evaluation of the value read on probe’s display – whose variability depends on both EM field and measurement system – with respect to the actual value of the underlying monitored process. That can be accomplished through a statistical investigation about whether the overcome of reference limits which can possibly have happened is merely a transient effect of measurement uncertainty which sums up with random process variation, or rather a more serious stable condition which calls for countermeasures.
To that end, it is required that the probability distribution of the monitored process be obtained from the set of measured data, which can be done by taking out of them the fluctuation due to measurement itself. Such methodology falls under the generic name of deconvolution, after the operation used to separate the two contributions, and requires a preliminary measurement campaign for the evaluation of the statistical distribution of data. This paper presents the mentioned methodology and provides an example pertaining the evaluation of the electromagnetic field in urban area.

Jacek Golebiowski
MEASUREMENT OF AIR HUMUDITY WITH APPLY MEMBRANE SILICON ULTRASONIC DEVICES

The devices to the measurements of relative air humidity with the membrane silicon ultrasonic sensors were presented. The temperature measurements and the determination so called dew point are especially important in the determination of relative air humidity by dew point technique. The accuracy of the dew point determination appoints the accuracy of the method. The optical and photoelectric devices are used very often to the dew point determination in the different applications of this technique. The possibility of the membrane silicon sensor with ultrasonic plate waves application to the determination of the appearance of condensed water vapour is presented in this paper. The device with the ultrasonic plate waves is shown and described. The advantages of the constructed sensor in the practical determinations of air relative humidity by dew point technique are discussed. The results of experimental date are presented.

Aimé Lay-Ekuakille
ATMOSPHERIC REMOTE SENSING: TEMPERATURE DATA ACCURACY EVALUATION OF RASS-WIND PROFILER SYSTEM

The aim of this paper is to show the usefulness of a combined apparatus of RASS (Radio Acoustic Sounding System) and radiometer as an integrated sensor system in Remote Sensing field, especially in recovering atmosphere temperatures. Since these two systems work at different frequencies and conditions, it is interesting to see how they can be integrated according to data calibration instead of processing. A supervising unit that describes signal state in some of its conditions has been implemented, for a particular instant of time measured in clock pulse. It is useful to calibrate Rass- Wind Profiler data with radiometer and radiosonde ones. That is, to icrease the accuracy of recovered temperatures by Rass. Simulations and comparison with actual data have demonstrated that this kind of approach is necessary to fill limitations of one apparatus with respect to another.

Jaromír Volf, Marie Bláhová, Stanislav Holý, Karel Vítek, Ladislav Hrubant, Vladimír Bezouška
SPECIAL MINIATURE TRANSDUCER FOR IN VIVO OF BONE MEASUREMENT

This paper attends to new special transducer for measuring the stress field in the bone. This transducer is designed as hole that into bone is placed. Paper described design of this transducer, its properties, results of measurement in simulation conditions and its calibration.