Iridium anomaly in the cretaceous-paleogene boundary at Højerup (Stevns Klint, Denmark) and Woodside Creek (New Zealand): The question of an enormous proportion of extraterrestrial component

The Cretaceous-Paleogene boundary clays at Højerup and Woodside Creek show anomalous enrichments of iridium compared with the marine sedimentary rocks. For the average iridium content of 465 ppb in CI chondrite the estimate of the carbonaceous chondritic proportions in the decarbonated iridium-rich boundary layers, based on the integrated iridium fluencies, is about 26% at Højerup and 65% at Woodside Creek. These proportions are most likely too high due to a significant Ir influx from the nearby marine or continental site to these sections

A model for introducing strategies in sustainable development of small-scale enterprises in Serbia

This paper presents the algorithm for introducing the strategies ensuring the sustainable development of enterprises, but also provides improvement of small-scale manufacturing process. Three strategies are given in the algorithm: Remanufacturing, modification and 4R. Credibility of the algorithm is reflected in: defining the basic input and output elements, defining the important environmental factors, importance of resources and in defining a sustainable production process. The combination of the aforementioned strategies enables local enterprises to perceive easily the importance of achievements in developed countries. Reuse of products is implemented through: verification, disassembling, replacement of parts, installation of modified parts and components, cleaning, re-assembling and testing. The algorithm gives an example of how to save materials and energy appearing as huge losses in manufacturing process

The importance of new product development in Serbian small-scale manufacturing enterprises

”Market pull” strategy is dominating in small scale manufacturing enterprises in the Republic of Serbia. The research whose results are presented in this work has determined the significance of this strategy from the aspect of developing new products. The strategy is reflected in close collaboration of enterprises and their customers, from the idea to the final product, including R & D activities. Beside customers, the main sources of ideas are: competitors and fairs. It has been also determined that marketing activities related to introduction of new products are limited and in comparison to the results from surrounding countries Serbia doesn’t lag behind. However, in order to improve the activities related to the development of new products in Serbian small-scale manufacturing enterprises we have suggested two strategies in this work: ”open innovation” in making closer collaboration with external knowledge sources and the creation of ”innovative networks” with partners in this concept usage. Limitations of this research are: weak feedback from respondents (the questionnaire was sent by e-mail), geographical limitations of the sample and the lack of homogenious sample group in the analysis of certain parameters.VI International Symposium Engineering Management and Competitiveness 2016 (EMC 2016), June 17-18, 2016, Kotor, Montenegr

Geochemistry of the hydrothermal dickite (nowa ruda, lower silesia, poland): chromium

Geochemical analyses for trace Cr have been made on a representative sample of a typical hydrothermal dickite filling vein at Nowa Ruda. The mineralogy of the sample is comparatively simple, dickite being the principal component (ca. 91% of total sample). Geochemical fractionation and inductively coupled plasma-optical emission spectrometry (ICP-OES) indicate that most (>96 % of total metal) of Cr reside in the dickite. The combination of geochemical and spectroscopic tools applied on Cr3+ allow one to specify the Eh (>0.4 V, highly oxidizing) and pH (≤4.0, highly acidic) of the solution during the formation of dickite from the Nowa Ruda Basin. We suggest that hot hydrothermal waters leached the surrounding varieties of gabbroids enriched in Cr for the dickite-forming solution

Vertical distribution of 137Cs in the undisturbed soil profiles in the basin of pčinja river, southeastern serbia

The 137Cs activity concentrations in six undisturbed soil profiles collected during 2013 in the basin of Pčinja River, southeastern Serbia, were determined gamma-ray spectrometrically. Average value of six undisturbed soil profiles by layers was calculated and vertical distribution of 137Cs activity concentration at 5 cm interval samples was shown by average profile. The 137Cs activity concentrations varied between 0.29 and 70.9 Bq kg-1 with a mean of 10.7 Bq kg-1. Even 27 years after Chernobyl accident 74% of deposited 137Cs was found in the first 20 cm of the soil

Multipolar structure of international relations at the beginning of the 21st century

The end of the Cold War brought to the world the rule of one ideology, one socio-economic system, and the maximum liberalization of international economic developments. But, the beginning of the 21st century will already see the move into the phase of a multipolar world with four dominant economic and political powers: the United States, China, European Union, and Russia. Each of these dominant participants in the global processes has its own specificities, advantages and problems. Global relations are rapidly changing. This paper analyzes possible development of economic, political and military relations between the dominant participants in global processes

Preliminary geochemical investigation of karst barre from eastern Serbia Sokobanja basin

Karst bare is a hydrogeological phenomenon which denotes a karst terrain of limited area completely surrounded by rocks of low permeability, i.e. whose lower part is enclosed and bordered by more or less impervious rocks impeding ground water flowing out of the karst area. Sokobanja basin is one of the first localities where this kind of karst was detected. This study represents a preliminary geochemical analysis of karst bare samples from this locality. Atomic absorption spectrometric analysis shows that the studied samples are composed predominantly of Ca and contain minor amounts of Mg, probably in form of carbonate minerals obtained by dissolving with mineral acids. There are no detailed geochemical data about karst barre from this or any other locality in the available literature to date

Preliminary geochemical investigation of karst barre from eastern Serbia Sokobanja basin

Karst bare is a hydrogeological phenomenon which denotes a karst terrain of limited area completely surrounded by rocks of low permeability, i.e. whose lower part is enclosed and bordered by more or less impervious rocks impeding ground water flowing out of the karst area. Sokobanja basin is one of the first localities where this kind of karst was detected. This study represents a preliminary geochemical analysis of karst bare samples from this locality. Atomic absorption spectrometric analysis shows that the studied samples are composed predominantly of Ca and contain minor amounts of Mg, probably in form of carbonate minerals obtained by dissolving with mineral acids. There are no detailed geochemical data about karst barre from this or any other locality in the available literature to date

Ftir spectroscopic characterization of bituminous limestone: Maganik mountain (Montenegro)

FTIR spectroscopy has been used to detailed study of bituminous limestone samples from two different locations at Maganik Mountain (Montenegro). Bituminous limestone at Maganik Mountain occurs as carbonate sediments in three levels and belongs to the early Cretaceous. Our specimens come from the oldest sediments of this limestone belonging to Barremian age. Particular attention has been given to investigation of isolated asphaltenes and kerogens. The FTIR technique provides fine determination of various organic and inorganic functional groups, as well as aliphatic and aromatic carbon and hydrogen. Due to the structural complexity of kerogens and asphaltenes, in this study we have done correlations of particular infrared absorptions to various functional groups. The asphaltenes of studied samples show higher contribution of aromatic structures than the kerogens. Notable differences in FTIR spectra of some samples that are reflected as shift of peak locations and a variety of intensities are attributed to eventual differences in the microbial precursors and/or depositional environments, conditions of sedimentation and/or genesis

Characteristics of mineral, thermal and thermomineral waters of Carpatho-Balkanides Region (Eastern Serbia): The potentials and possibilities of their exploitation

Hydropower, biomass, biogas, biofuels, wind power, solar energy and geothermal energy are the major resources to provide the Republic of Serbia with most of renewable energy in the future. In this paper, the focus will be on renewable sources, specifically on thermomineral, thermal and mineral waters in the Carpatho-Balkanides Region (Eastern Serbia). The territory of Serbia is very rich in sources of mineral, thermal and thermomineral water. These numerous sources differ in their physico-chemical properties. Thus, they represent a very important natural resource with versatile possibilities for their usage. Region of Carpatho-Balkanides (Eastern Serbia) is highlighted in this regard. The distribution of mineral, thermal and thermo-mineral waters in this region is very significant, both by the number of known occurrences and deposits, as well as by the presence of certain types or classes and subclasses of water. This potential, at the same time, represents the basis for the development of various activities in the fields of medicine, tourism, sport and recreation, water bottling industry, as well as in processing of various mineral, agriculture etc. All these facts imply on the need for detailed and complex investigations in the field of hydrogeology of this natural wealth which offers, in economic terms, the great opportunities for the development and growth. However, the practice, on studied territory, showed neither proper understanding nor proper approach to the exploitation of this raw potential