With the growing air traffic intensity, at some ai1ports weare more often faced with the fact that aircraft land or take offone after another. Since evety aircraft leaves a turbulent vortexbehind, which acts unexpectedly and is destabilising for theaircraft flying into it, the flight safety in such repeated landingsand takeoffs becomes questionable. Determining the minimumsafety time interval between the repeated operations becomesimperative and a limiting factor for some airports withhigh air traffic intensity. Unlike militaty flying, where crew istrained to fly in a group, in civil air traffic the crew is nottrained for such flying and on top of it mostly operate on largeaircraft, which produce very strong turbulent vortex. Additionalsophisticated equipment in new modem aircraft improvesnavigation, communication and steering of the aircraft, butdoes not insure it from flying into an invisible turbulent vortex.This paper discusses the vortex generation, its nature and fa ctorsthat influence its intensity and duration. The paper alsodeals with a model of calculating the probability of flying intoa turbulent vortex regarding time intetval of repeated opera tions,and influence of sophisticated equipment installed, onthe stability and flight safety of an aircraft. Conclusion underlinesthe need to standardise the minimum safety time intervalseparation between the repeated operations, with the aim ofimproving flight safety.

Traffic science cannot emerge from 'emb1yonic state' if ithasn't common methodology and unified (fonnal) treatmentof traffic, relevant for different transportation and (tele)communicationsubsystems. Generalised model (metamodel) oftraffic process or traffic (system) the01y, must ensure consistencyand provide common platj01ms for large scale of trafficengineering (technologies) problems.This paper is concentrated only to consider dynamic approachin unified formal (mathematical) description of trafficprocess. Identification of some generic traffic relations andisom01phy are associated with the relevant contributions from'classical' traffte flow theory and teletraffic references. Dynamicflow models are considered as an approximation ofqueuing models and as an independent detenninistic and stochasticdescription of traffic process. Fwther 'more-integrated'contributions and development of generalised traffic (system)the01y are suggested.

The paper deals with some advantages and disadvantagesof adhesive bonding compared to concurrent bonding technologies,as well as possibilities of applying adhesive bonding injoining of materials. The listed joining methods are comparedto adhesive bonding, and the evaluation cliteria for each processare given.Some examples are presented regarding adhesive bondingapplication in automotive, aerospace and electrical industries.

The work analyses the possibility to diagnose the overalloperation of the piston engine based on the crankshaft angularspeed. The testing was camed out on the basis of the mathematicalmodel-simulator of malfunctioning. The possibilityfor diagnostics based on the lack of uniformity of the crankshaftspeed has been confirmed and the continuation of experimentingin practice with the proposed method justified.

The paper studies the problem of sequence optimisation inoverhaul activities production process modelling. Possibletasks, optimisation criteria and methods are analysed. Methodsfor solving two- or multi-phase production processes areillustrated on examples from practice. Special attention is paidto rules and criteria for selecting the optimal sequence in multi-phase production processes. For the given examples the optimalprocess sequence is presented graphically with the resultsanalysis.

The land and satellite communication systems provide amore rational utilisation of road network, by guiding the vehiclesto the destination using the best routes. This results in economicadvantages regarding reduced mileage, shorter travellingtimes, etc.

In order to establish the respective criteria for categorisationof bus stations, since no criteria have been determined yetbased on the world experience, the existing conditions havebeen analysed in all 64 bus stations in Croatia by use of questionnaires.Based upon the basic and additional facilities, busstations fall into four categories: A, B, C and D, and these arethen called basic and additional criteria.The basic criteria involve specific aspects obligatory forevery category. The number and type of aspects refer at thesame time to the minimum number of points assigned per category.There exists a 3-point discriminating difference betweenindividual categories.The additional criteria involve the accompanying aspectsrequired for the functioning of the system; they are optionalwithin the frame of a given number of points per category, andthere exists a 4-point dicriminating difference between individualcategories.Categorisation makes the basis for establishing the pricelist at bus stations, in turn imposing the requirement of provisionof a given level of bus stations services.

The article lists the unusual shipments in air transport.Over 2% of the annual cargo air transportation are the unusualshipments. Good co-ordination of the reception and deliveryprocesses of unusual shipments is one of the importantfactors in providing good and fast service knowing the basicregulations in air traffic.

Supply of goods, equipment and soldiers by militwy transportaircraft can serve as a support to airborne landing operation,support to encircled forces, and support to forces leadinga gue1rilla war. Transport aircraft are designed in such a wayas to be able to cany containers, pallets, most of land vehiclesand helicopters. Militwy transport aircraft can be grouped intothose that were originally designed for military transp01t andthose that are modified civilian aircraft and helicopters. Supplypallets can be wooden, metal, can be airdropped in 'taxiing','low-flight', and can also be fitted with a parachute or'retrorocket' for reducing the ground impact. Pallets canamong other things carry liquids, heavy combat and ca1rier vehicles,artillery and rocket weapons and valious containers.Pallets are usually pe1manently deformed at ground impact.Nowadays, high precision of airdrop has been achieved. Containersare used to carry various equipment, food, fue~ weapons,ammunition etc. It is to be expected that the containers,wmoured combat and other vehicles will be redesigned so asto provide more efficient transport and fast a!Tangement ofhigh-mobility units, whereas the form of the future militarytransport aircraft will not undergo substantial changes. By adjustingand standardising the transporlation vehicles, integraltransportation means and cwgo, the overall combat efficiencywill be increased, the a~rangement time especially shortenedand the air supply safety increased.