Summary.Objective. The aim of this study was to establish and compare diagnostic accuracy (sensitivity, specificity, and diagnostic odds ratio) of plain x-ray, ultrasonography, bone scintigraphy, computed tomography (CT), and magnetic resonance imaging (MRI) CT was 0.67 (95% CI, specificity, 0.5 (95% CI, and diagnostic odds ratio, 2.0 (95% CI,. The sensitivity of early x-ray was specificity, 0.96 (95% CI, and diagnostic odds ratio, 4.34 (95% CI,. The sensitivity of MRI was 0.81 (95% CI, specificity, 0.67 (95% CI, and diagnostic odds ratio, 8.67 (95% CI,. The sensitivity of late x-ray was 0.82 (95% CI, 0.75-0.88); specificity, 0.92 (95% CI, 0.62-1.0); and diagnostic odds ratio, 51.17 (95% CI, 6.61-2222.0). The sensitivity of bone scintigraphy was 0.81 (95% CI, specificity, 0.84 (95% CI, and diagnostic odds ratio, 22.30 (95% CI,.Conclusions. Our analysis showed that late x-ray is the most valuable radiologic method in the diagnosis of acute hematogenous osteomyelitis, but bone scintigraphy and magnetic resonance imaging are the most valuable tests at the onset of the disease.Correspondence to V. Barauskas,

Port tugs are an important element in port activity and navigational safety issues. Port tugs ensure the safety of big ships while they are entering, manoeuvring, mooring and unmooring, and are of huge importance during other port operations. At the same time, optimizing the number of port tugs and tug bollard pull is also important from a port navigational safety and economic point of view. Calculation and evaluation methods of the optimal request for tugs bollard pull, in particular, port operations, are very important in order to guarantee the navigational safety of the port and ships during the main ship operations in the port. This article provides the number of requested port tugs and bollard pull calculation and evaluation methods on the basis of forces and moments acting on ships. On the basis of real ship voyages and manoeuvring at ports data as well as high accuracy simulators, theoretical methods were used, which were followed by our conclusions and recommendations, which can be used by port harbour masters and tug companies. Modern tugs have become an important element and integral part of modern port navigational safety. Such modern port tugs are also used for navigational safety and other important port functions and activities, such as fire protection and search and rescue operations. The optimal number and capacity evaluation of port tugs depending on port capacity and conditions are studied in this article.

Optimization transportation cargo and passengers between ports and regions are very important, because industrial regions are located some distance from ports. The demand for energy request for the movement of transport is a necessity in the modern world. Transport and activity called transportation are used daily, everywhere, and a lot of energy is needed to power the various transport modes. Today different transport modes are being used to transport passengers and cargo. It is quite common to use road transport, which can transport passengers and cargo from door to door. Considering alternative possibilities (road, railway and/or inland waterway transport), it is important, based on theoretical and experimentation, to identify optimal solutions. In finding transport modes that are either most technically or economically effective, we could unearth possible solutions which would require minimal energy use. Unfortunately, with increased transportation, this often leads to traffic congestion on the roads, which requires additional energy (fuel). This situation generates requirements from many stakeholders in terms of finding ways to decrease the transportation time and energy (fuel) consumed by transport modes. A theoretical method evaluation is conducted on the optimal transportation possibility that minimizes transportation time and energy (fuel) use by employing graph theory, which is presented in this paper. The scientific contribution is the development of a transport modes comparative index, which is then used for evaluations. This paper presents possible alternative transportation conditions based on a multi-criteria evaluation system, proposes a theoretical basis for the optimal solutions from an eco-economic perspective that considers energy, and provides for experimental testing during a specific case study. The final results from the case study provide recommendations and conclusions.

Hydrodynamic interactions between ships in narrow channels are important for studying purposes and practical tasks. The paper presents a theoretical basis for the interaction between ships in narrow channels to evaluate reciprocal actions between ships, the experimental results of real ships and data received applying calibrated simulators. The theory and experimental results displayed in the paper could be used for designing channels and evaluating navigational safety in narrow channels as well as for ship steering tasks in narrow channels.

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