The paper considers the surge of a spring, retained at oneend and controlled by a cam at the other end. The periodic liftfunction of the cam was approximately replaced by the Fourierpoly nom. The forced displacement amplitudes were determinedfor each harmonic of this poly nom. The theory of forced longitudinal vibrations of a bar with continuously distributed mass,elasticity and dumping was applied to simulate the motion ofspring coils. It was found out that two or more modes may consistconcurrently in the spring. This was obtained by analyzingmathematical formulas and by comparing computed and publishedmeasured results. The line spectrum of the Fourier serieswas introduced as a useful tool for estimating the influence ofthe high order harmonics on the spring surge.

Modelling of traffic processes in telecommunication systemsin the process of the shift of technologies is indispensablefor purposes of planning and designing the extension of capacitiesand monitoring of the existing traffic flows. The paperdeals with the traffic problem in the telecommunication systemin the period of the exchange of technologies, discussing trafficas a random process and expounding the need for modellingtraffic processes by way of servicing models.

Paklenica National Park, covering an area of 3.617 ha,( 1.447 acres) belongs to the group of smaller Croatian nationalparks. It is situated on the Southern slopes of Mount Velebit descendingto the lower coast region, near the Adriatic Highwayand the small town of Starigrad-Paklenica. From the NationalPark, it takes approximately 45 km (26 miles) by road to thenearest/own of any size, Zadar. The sea routes from StarigradPaklenicato Rijeka and Zadar; passing through the LowerVelebit Channel (Podvelebitski kanal) and the Pag and the VirPassages (Paski i Virski prolaz), are not used for public transportas regular ferry and ship links. From the East, Paklenica isclosed by the high Velebit ridge running from Rujan to SveloBrdo. Traffic access to the National Park is therefore easiestfrom the low coastal area from the Southern Starigrad-Paklenicasuburb.The main access route to Paklenica National Park today isthe Adriatic Highway, or E-65 road.

During the Croatian War the military forces of the RepublicofCroatia were faced both with foreseen and unforeseen demandsregarding successful airspace combat actions, requiringfull engagement of all human and physical resources of theCroatian Military Air Force.Military Air Force, the most sophisticated part of thearmed forces, has contributed to the success of the operationsby acting in and from airspace against ground and sea targets.The supersonic aircraft efficiency in combat action overairspace targets can be increased by acquiring knowledge regardingthe maximal maneuvering capabilities, application ofgraphic-analytic modeling during flight preparations, educationof pilots and other participants in order to maximally exploitthe aricraft capabilites applying the forced turn. Graphicanalyticmethod of preparing the pilot for combat mission isone of the methods used at a higher level of psychological, theoreticaland practical realizations of the next flight conditions.It is applied in order to increase the efficiency of air-combatand to reduce one's own losses.

Designing technological marketing mix (TM-MIX) in differenttraffic, transport and telecommunication systems has abasic feature of a 'decision-making problem' (DMP ). The paperdiscusses mathematical constructs and procedures applicablein developing TM alternatives and in the choice of the bestcombination (composition) ofTM-mix. Algorithm for solving a'General Choice Problem' is presented. Expert Choice Softwareand other decision-support tools have substantial theoreticalsupport in the denoted concepts, procedures and algorithms.