FUSION AND VISUALISATION OF THE COLOR AND LONG WAVE INFRARED IMAGES OF VEGETATION FIRES

The aspects of the image fusion and visualization of the color and long wave images are considered in the frame of the airborne reconnaissance and surveillance of the vegetation fires. The main constrains are consequence of the aerial platforms used: a) small lightweight aerial model (less than 5 kg, altitude up to 300 m above mean ground level, radius limited by visibility), b) helicopter or fixed wings piloted airplane. Although the measurements of the forest fire temperature are not reliable (unknown emissivity), its indication is possible and the fusion of the color image and the long wave infrared image seems the most suitable solution for firefighting commander

ANALYSIS OF THE POSSIBILITY OF UTALIZATION OF HONEY BEES IN EXPLOSIVE DETECTION

The fact that honey bees can detect explosive is widely known since late ’90, particularly when US Defense Advanced Research Projects Agency (DARPA) solicited in 1999 proposals on Control led Biological and Biomimetic Systems. The honey of honey bees was known and approved in Croatia in 1994, 1997, 1999, 2002, as the sensitive indicator of the nuclear pollution (after Chernobyl). The application of the honey bees for the detection of the explosive and the land mines was treated in several scientific research and development projects. There are two main aspects of the application of the honey bees: biological and technical. The biological aspects are among others, the conditioning, training of honey bees, and assessment of their sensitivity for the various explosives and methods of their application and will not be considered. In this paper we consider technical aspects regarding the application of the honey bees for explosive and landmine detection, particularly methods, techniques and technologies of gathering data and information from honey bees smelling the explosive. For the detection of the honey bees over explosive samples were used several methods and techniques: locating the honey bees by lidar, locating the honey bee caring the microwave dipole and detecting the third harmonic of the radar waves, detecting honey bees by spectral features. This technique is very complicated and alternative approach was researched and approved in Croatia for assessment of the bees’ distribution over wide area: detecting the honey bees from air by electro optical sensors, using long wave thermal camera and digital image processing. Third direction of research and development is aimed for the handheld sensor for detection of the explosive and one system is available (VASOR136)

Formation of magnetic microstructure of the nanosized NiFe2O4 synthesized via solid-state reaction

Magnetic NiFe2O4 structure formation was studied through structural, compositional and magnetic characterization of obtained reaction products of a simple, high yielding and low-cost solid-state reaction. Initial annealing of the starting oxides mixture at 700ºC did not allow us to observe formation of the desired magnetic phase. In contrast, subsequent thermomagnetic measurements up to 800ºC indicated the considerable increase of the magnetic moment, which can be reasonably assigned to the changes in phase composition and formation of magnetic NiFe2O4 structure during the heating cycle of measurements. Nanosized NiFe2O4 phase formation has been confirmed by the following XRD and MS phase analyses and its nanocrystalline structure by XRD and SEM/TEM techniques. The obtained hysteresis loop taken after TM measurements suggest the increased volume of magnetically active material and thus additionally support the previous findings

A Proposal for Taxonomic Re-Evaluation of Vaccinites Species from the Santonian Limestones of Southern Istria (Croatia)

Rudists, especially members of the family Hippuritidae, were common dwellers on the Adriatic Carbonate Platform during the Late Cretaceous. Morphological elements (ligamental ridge, teeth, pillars, length of the contour around the inner margin of the outer shell layer and the ratio between this length and the distance between the sutures of the pillars) from the transverse shell sections permit different species to be defined within the family. Transverse sections of Vaccinites specimens from the Santonian limestones in southern Istria show different values of the angle between the teeth and the ligament ridge, between the ligamental ridge and the E pillar (P2), and of the ratio between the length of the contour and the pillar suture distance. Cluster analyses (Ward’s and Unweighted pair–group average methods) using measured elements, allowed the definition of three species groups from seventeen species at the beginning of study

BGP Anomaly Detection with Balanced Datasets

We use machine learning techniques to build predictive models for anomaly detection in the Border Gateway Protocol (BGP). Imbalanced datasets of network anomalies pose limitations to building predictive models for anomaly detection. In order to achieve better classification performance measures, we use resampling methods to balance classes in the datasets. We use undersampling, oversampling and combination techniques to change class distributions of the datasets. In this paper we build predictive models based on preprocessed network anomaly datasets of known Internet network anomalies and observe improvement in classifier performance measures compared to those reported in our previous work. We propose to use resampling combination techniques on datasets along with Decision Tree and Naïve Bayes classifiers in order to achieve the best trade-off between (1) the F-measure and the length of model training time, and (2) avoiding overfitting and loss of information

Adsorption of Carrageenans on Mercury Surface in Sodium Chloride Solution and Seawater

Adsorption of natural sulphated polysaccharides from algal sources, ι-, κ- and λ-carrageenans, on mercury surface was studied by out of phase a.c. voltammetry. Adsorption studies were performed in a wide concentration range (10 mg/L up to 15 g/L) and the influence of the adsorbed layer on the reduction of cadmium ions, used as a probe, was studied as well. The adsorption was measured at two potentials, -0.2 V and -0.6 V vs. Ag/AgCl reference electrode. The stronger, one step adsorption, was obtained at the potential of -0.2 V. At the potential of -0.6 V, the first adsorption plateau was established at the concentration of app. 100 mg/L of added polysaccharide while at the concentration of few g/L a second adsorption plateau was established. The oxido-reduction processes of Cd2+ ions were influenced by the presence of sulphopolysaccharides only in the concentration range of a few grams/L. At the potential of E = -0.6 V after the first adsorption plateau, adsorption is a slow process, determined by both the concentration of polymer in the solution and the time of adsorption. It is most probable that transformations of the adsorbed layer occur

U kojoj mjeri veličina zrna utječe na interpretaciju sastava zajednica planktonskih foraminifera - primjer iz južnog Jadrana

Study of planktonic foraminifera, sampled from two levels of a 26 cm thick core, recovered at 1,200 m water depth, sheds some lights on the composition of foraminiferal assemblages that occur in the Southern Adriatic. Altogether 15 planktonic species (including one referred as undeterminable and two species recorded for the first time in the eastern Adriatic Sea) identified from 0-2 cm and 24-26 cm sediment intervals, were grouped into two assemblages: >63 μm fraction Turborotalita quinqueloba and >125 μm fraction as Globigerina bulloides-Globigerinoides ruber. The differences in core-top and core-bottom assemblages lie in: a) change in the relative proportion of some species; and b) slight differences in diversity indices. The relative proportions of species are strongly controlled by sieve mesh size, whereas the slight increase in diversity follows the increase in sieve mesh size. The benthic foraminifera, although constituting a negligible quantitative factor, show a slight increase in abundance and diversity of species with age.Istraživanje planktonskih foraminifera iz dviju razina 26 cm duge jezgre izvađene sa 1,200 m dubine daje nove podatke o sastavu foraminiferskih zajednica u južnom dijelu Jadranskog mora. Ukupno 15 planktonskih vrsta (uključujući jednu neodredivu i dvije vrste koje su po prvi puta zabilježene u istočnom dijelu Jadranskog mora) određene su iz sedimentnih intervala 0-2 cm i 24-26 cm grupiranih u dvije zajednice: frakcija >63 μm nazvana Turborotalita quinqueloba, te frakcija >125 μm Globigerina bulloides -Globigerinoides ruber. Razlike između zajednica u vršnom i najdubljem dijelu jezge leže u: a) razlici u relativnim zastupljenostima nekih vrsta; b) blagim razlikama u indeksima raznolikosti. Relativni udio vrsta pod snažnim je utjecajem veličine otvora sita, gdje s povećanjem otvora sita lagano raste raznolikost. Bentičke foraminifere, iako čine neznatni kvantitativni faktor, pokazuju blago povećanje udjela i raznolikosti vrsta s dubinom sedimenta (sa starosti)