UDK 630*81:674.031.632.2 This paper presents the research results on: Variation of widths and heights of 1-3 seriate wood rays within beech stem (Fagus silvatica,L.) Variation of widths and heights of 1-3 seriate wood rays within normal and tension branch

UDK 630*38 Secondary forest roads network or so-called technical infrastructure of the component should fulfill three important functions: (1) biological, (2) technical and (3) economical. By limitation of movement of working devices and loads via designed routes, the damages of soil and component have been minimized enabling their easier and faster movement. This results in more productive work with reduction of skidding costs and level of forest damages at the same time. The most important feature of tractor roads as the most frequent way of secondary forest roads network in Bosnia and Herzegovina is surely their longitudinal slope. The maximum allowed longitudinal slope of tractor roads should not exceed 12% if their conversion into truck roads has been planned for the future (Jeličić, 1983). On the contrary, the longitudinal slope of tractor roads should not exceed 16 % if the erosion activity of water and long-term usage of tractor roads have been taken into account (Jeličić, 1983), which is almost the rule in Bosnia and Herzegovina forestry practice. However, the maximum longitudinal slope of tractor roads in practice is very often higher than 30 %, which usually results with their fast ruining due to erosion impact of the water. In this article, at the selected forest area-department, the impact of the longitudinal slope of tractor roads and openness of a forest department and timber skidding costs have been analyzed.

The goal of this paper is to analyze banking regulation in Bosnia and Herzegovina and the progress made by banks in the management of banking risks. Basel Committee on Banking Supervision requires banks to establish a reasonable infrastructure for risk management. This infrastructure should identify, measure, monitor and control the risks that the bank is exposed to their operations. In this sense, the work was carried out research on the management of credit risk, liquidity risk and operational risk in order to gain knowledge about the progress of the banking sector in Bosnia and Herzegovina on the implementation of Basel 2. This paper represents the results of a research carried out on twenty out of thirty planned banks in Bosnia and Herzegovina that were surveyed during 2009, which makes 66.6% of the total sample (or 83.17% of total assets of the banking sector in Bosnia and Herzegovina). Summarized results of the questionnaire also showed further progress of the banks in complying with Basel 2, although it turned out that they often react to developments and changes without the existence of necessary infrastructure and business culture to keep it.

Properties of the Zagreb indices of pseudo-regular graphs are established, with emphasis on the Zagreb indices inequality. The relevance of the results obtained for the theory of nanomolecules is pointed out.

Recently, discrete and variable Adriatic indices have been introduced and it has been shown that the sum α -exdeg index is good predictor (when variable parameter is equal to 0.37 ) of the octanol-water partition coefficient for octane isomers. Here, we study mathematical properties of this descriptor. Namely, we analyze extremal graphs of this descriptor in the following classes: the class of all connected graphs, the class of all trees, the class of all unicyclic graphs, the class of all chemical graphs, the class of all chemical trees, the class of all chemical unicyclic graphs, the class of all graphs with given maximal degree, the class of all graphs with given minimal degree, the class of all trees with given number of pendant vertices, and the class of all connected graphs with given number of pendant vertices. Also, many open problems about variable Adriatic indices are proposed.

In this paper we analyze the set of the variable Adriatic indices. We show that three of these indices show very good predictive properties. Namely, the inverse sum -1.95-deg index is well correlated with the standard enthalpy of formation of octane isomers   2 0.75 R  , the inverse sum 0.43-lodeg index is well correlated with the total surface area of octane isomers   2 0.92 R  and the sum 0.37-exdeg index is well correlated with the octanol-water partition coefficient   2 0.99 R  . (doi: 10.5562/cca1666)