Izvod Ispitivano je elektrohemijsko taloženje cink-kobalt legure pulsirajućom strujom na čeliku, a s ciljem dobijanja zaštitnih prevlaka sa povećanom korozionom stabilnošću. Prevlake legura su taložene pulsirajućim režimom sa različitim srednjim gustinama struje i pri različitom trajanju katodnog pulsa. Analiziran je uticaj ovih parametara na iskorišćenje struje prilikom elektrohemijskog taloženja na izgled prevlaka (snimanje elektronskim mikroskopom), hrapavost prevlaka i njihovu korozionu stabilnost u 3% NaCl (merenjem slobodnog korozionog potencijala u agensu korozije i snimanjem polarizacionih krivih). Pokazano je da u zavisnosti od vremena pulsa, prevlake taložene pulsirajućim režimom mogu da imaju bolju homogenost, sitnije aglomerate kristalnih zrna i manju hrapavost od onih taloženih pri istim uslovima, ali konstantnom gustinom struje. Veću korozionu stabilnost pokazale su prevlake legura taložene većom srednjom gustinom struje.

Starting from the fact that the real mechanism in a chemical equation takes places through a certain number of radicals which participate in simultaneous reactions and initiate chain reactions according to a particular pattern, the aim of this study is to determine their number in the first couple of steps of the reaction. Based on this, the numbers of radicals were determined in the general case, in the form of linear difference equations, which, by certain mathematical transformations, were reduced to one equation that satisfies a particular numeric series, entirely defined if its first members are known. The equation obtained was solved by a common method developed in the theory of numeric series, in which its solutions represent the number of radicals in an arbitrary step of the reaction observed, in the analytical form. In the final part of the study, the method was tested and verified using two characteristic examples from general chemistry. The study also gives a suggestion of a more efficient procedure by reducing the difference equation to a lower order

The population of young people in Bosnia and Herzegovina is confronted with many challenges - economic, institutional and social. The participation of young people in education drops significantly after they turn 18, while entry into the labour market happens around 20 years of age. Unemployment mostly affects people with lower education levels, such as those with a secondary school degree or qualified workers. The youth unemployment rate, the most commonly used indicator of the disadvantages faced by young people in the labour market, is very high in Bosnia and Herzegovina. The single most significant factor affecting the labour market experiences of young people is the extensive informal economy in the country. Active Labour Market Policy for young people attempts to reduce the problems faced by young people in their attempts to find decent work once they enter the labour market. They attempt to remedy failures of the educational system and to improve the efficiency of labour market matching. The percentage of unemployed youth is of great importance because the youth are in the age when the ability and motivation for work are at their peak. Any society that excludes half of its population from the sphere of work acts against public interest

The kinetics of passivation based on the reduction of current density ...

This paper discusses the methods of evaluating active labor market policy. In addition, an important aspect of the analysis, conducted in this paper, concerns the assessment of the relative success of these measures in the case of the Republic of Srpska. The statistical analysis evaluated the success of three chosen projects implemented in the Republic of Srpska. A major problem in evaluating the effectiveness of individual measures is inadequate IT support. The unemployed persons are not monitored for all the characteristics that play a significant role in determining the target groups for particular measures. The measures are primarily intended for young people and categories related to the recent war conflicts in the former Yugoslavia. The relative assessment of the success of individual measures has confirmed that these measures are not greatly influenced by raising general employment, but these programs, at least to some extent, alleviate the problem of unemployment and improve the position of the hard-to-employ categories of the unemployed persons.