The paper makes deep insight into project management and risk analysis of renewable energy sources (RES). This approach could be very helpful in the organizational and managerial approach for project success and investments in RES projects. The intent of the paper is to focus primarily on project management techniques for the purpose of achieving project's objectives and second on tools for risk assessment of renewable energy projects in order to define and evaluate risks so that they can be adequately mitigated to attract future investment. Particular energy sourceselevated hydropower used in small hydropower plants, and photovoltaic plants are considered in Section 3, as case studies, to identify and explore risk management approach for planning risk response during project implementation. Section 3.1 provides an overview of the major identified risks which include financial, political and operational risks, risks related to human resources and risks associated with renewable energy developments and markets. Discussion and conclusion are presented at the end of the article.

The issue of fertility and population reproduction has been an actual topic in North Macedonia for years now. The reduced birth and fertility rates, the more frequent delays of giving birth later in life, extramarital births, and reduced fertility rates are the main indicators that are pointing out the changes in the reproductive behavior. Such changes are due to the changes in lifestyle and changed social norms, the changes in the economy of the country, but also because women are more educated and emancipated compared to the past, they are getting employed after completing their education, they are more independent and have the freedom to choose whether, when and how many children they will have and so on. Using some fertility indicators, this paper shows the changes and their intensity in the period from the beginning of the nineties of the last century until the present. Some of these indicators include changes in the number of live births, the crude and specific fertility rates, the age at which women have a child (or first child), generation replacement, and more.

The influence of the social, economic, political, cultural and other changes and processes that are taking place in the country can be felt in the demogeographic changes that the Republic of Macedonia faces today. This global trend of demogeographic changes, such as lower birth and fertility rates, new conceptions of marriage and family, delayed marriage, new types of communities, changes in the educational level of the population, changes in the economic status, increased number of divorces and other, are also present in the Republic of Macedonia. The phenomenon of increased number of divorces is especially concerning, because it is becoming an integral part of the society more and more, and it reflects on all the processes of the population, particularly fertility. Despite the new understanding of life and the new types of informal communities, in most countries (even in the most developed), most of the children are still born within the marital union. This paper elaborates the regional analysis of the trend of divorced marriages in the Republic of Macedonia, the crude divorce rate, the number of divorces per 1,000 inhabitants older than 15 years and the number of divorces per 1,000 marriages in the period from 1991 to 2016. Divorces are also processed according to certain characteristics of the spouses. The purpose of this research is to point out the differences that occur among the regions when it comes to divorce.

This work presents a study of the infl uence of diethyl aluminum phosphinate (EOP) and sodium alumino silicate (ZP) as the novel green fl ame retardant spinning additives on the thermal properties of polyamide 6 (PA6) fi bres. The PA6/additive composite fi laments were prepared at 4 wt% concentration of additives and their mixture by melt spinning. The results show that the additives were physically incorporated into the PA6 fi lament, resulting in an insignifi cant change of the melting temperature. The presence of EOP decreased T onset and increased T max2 compared to pure PA6, which indicates that the degradation process started at lower temperature, whereas the thermo-oxidative stability in the second decomposition step increased. Contrary to EOP, ZP did not cause any noticeable changes in the decomposition temperatures comparing to pure PA6, but signifi cantly increased the fi nal char amount. Both phenomena were also observed when the additives were used in combination. Whereas EOP did not signifi cantly aff ect the mechanical fi lament properties, the incorporation of ZP resulted in the reinforcement of fi bres.

Nature has always attracted people with the beauty it creates. However, for the natural potential of a certain territory to be appropriately used, nature should be valorized, geoconservation and sustainable development. Attractive geodiversity is the main source for the development of geo-tourism. The promotion of geo-tourist destinations raises public awareness of the values of the objects of the geoheritage, but also of their endangerment. From the aspect of the geoheritage of Republic of Macedonia's territory, it can be noticed that there are representative and rare geological and geomorphologic objects which are a significant factor for the development of the geotourism. The objects of the geoheritage in the Republic of Macedonia possess high values and attractiveness that can be interpreted, edited and promoted for geo-territorial purposes. This study discusses the potential of Macedonia's geoheritage, which is based on preserving and managing the landscape and on the connection with the potential of its geotourism.