Geohazard Assessment in the Eastern Serbia

Dragićević, Slavoljub; Novković, Ivan; Carević, Ivana; Živković, Nenad; Tošić, Radislav

doi:10.5775/fg.2067-4635.2011.003.i

Cited by 18 publications

(21 citation statements)

References 6 publications

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“…Althouhg neither macroalgae nor macrophytic vegetation were observed at investigated sites, small communities of Sphaerotilus bacteria were reported to exist [27]. Exposure to intensive long-term heavy metal pollution can be held accountable for damaging the native aquatic ecosystems [22,23,26]. …”

Section: Resultsmentioning

confidence: 99%

“…The Bor River (syn. Borska Reka River) flows through the region of Bor, which is well known for the extensive soil, water, and air pollution with inorganic compounds caused by non-ferrous metal mining, smelting, and processing operations located in this area [23], and finally flows into the Timok River [24]. The main tributary of the Bor River are the Kriveljska and Ravna rivers (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Use of enzymatic tools for biomonitoring inorganic pollution in aquatic sediments: a case study (Bor, Serbia)

Filimon

Nica

Ostafe

et al. 2013

Chemistry Central Journal

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BackgroundSediment bacterial communities are key players in biogeochemical cycling of elements in the aquatic environment. Copper mining, smelting, and processing operations located in Bor area (Serbia) are major environmental hot spots in the lower Danube Basin and Western Balkans. In the present study, we evaluate the influence of trace element (TE) concentration in sediments and physico-chemical properties of water on sediment microbial communities in water streams adjacent to the Copper Smelter Complex Bor (RTB Bor, Serbia). The degree to which metabolic activities of bacterial biota inhabiting differently polluted sites is inhibited by inorganic pollution were compared using selected enzymatic bioindicators.ResultsCu, Zn, Pb, and As concentrations systematically exceeded the target values for metal loadings in aquatic sediments. Water electrical conductivity (WEC) followed the same pattern of spatial variation, irrespective of season. Interestingly, the most intense enzymatic activity occurred at the reference site although this site showed the greatest TE levels in aquatic sediments. Catalase activity (CA), potential dehydrogenase activity (PDA), actual dehydrogenase activity (ADA), urease activity (UA), and phosphatase activity (PA) in aquatic sediments displayed heterogeneous patterns of spatio-temporal variation. Inorganic pollution greatly affected CA, ADA, and PDA, but much less so UA and PA. Canonical correlation analysis showed that pH and WEC were the strongest determinants of enzymatic activity in bacterial biota, with the latter variable being reversely correlated with the enzymatic indicator of sediment quality (EISQ). The median values of EISQ increased with distance from the major sources of pollution. In addition, it was found that sites with different degrees of inorganic pollution can be appropriately classified by applying cluster analysis to EISQ, TE levels in sediments, and physico-chemical properties of water.ConclusionsBecause EISQ can precisely identify changes in overall enzymatic activity of sediment bacterial communities, this enzymatic bioindicator has a great potential for biomonitoring the current status of inorganic pollution in aquatic ecosystems.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Use of enzymatic tools for biomonitoring inorganic pollution in aquatic sediments: a case study (Bor, Serbia)

Filimon

Nica

Ostafe

et al. 2013

Chemistry Central Journal

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“…The primary control enables the basic operation of the system by regulating the electrical parameters (bus voltage and/or frequency) and keeping the supply-demand power balance to guarantee local stability. It is implemented in a decentralized manner using the droop control law [3], [3], relying only on the local measurements of the controllers. The upper, secondary and tertiary control levels optimize the performance of the MG in terms of maximizing the quality of the delivered power under minimal operation cost, and, in order to operate properly, require exchange of local information among the controllers.…”

Section: Introductionmentioning

confidence: 99%

“…The upper, secondary and tertiary control levels optimize the performance of the MG in terms of maximizing the quality of the delivered power under minimal operation cost, and, in order to operate properly, require exchange of local information among the controllers. Recent approaches suggest to avoid use of external communication systems for MG control applications, due to related costs, complexity and reliability issues [2], [3]; rather, the existing power line equipment is also used for communication [4]- [6].…”

Section: Introductionmentioning

confidence: 99%

Power Talk for Multibus DC MicroGrids: Creating and Optimizing Communication Channels

Angjelichinoski

Stefanović

Popovski

2016

2016 IEEE Global Communications Conference (GLOBECOM)

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We study a communication framework for nonlinear multibus DC MicroGrids based on a deliberate modification of the parameters of the primary control and termed power talk. We assess the case in which the information is modulated in the deviations of reference voltages of the primary control loops and show that the outputs of the power talk communication channels can be approximated through linear combinations of the respective inputs. We show that the coefficients of the linear combinations, representing equivalent channel gains, depend on the virtual resistances of the primary control loops, implying that they can be modified such that effective received signal-to-noise ratio (SNR) is increased. On the other hand, we investigate the constraints that power talk incurs on the supplied power deviations. We show that these constraints translate into constraints on the reference voltages and virtual resistances that are imposed on all units in the system. In this regard, we develop an optimization approach to find the set of controllable virtual resistances that maximize SNR under the constraints on the supplied power deviations.

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“…One of the objectives was a cost-benefit analysis that demonstrated the economic and social impact upon soil erosion for a time period of 80 years. Dragičević et al [51] were the first to analyse uncertainties in the magnitude and spatial distribution of annual sediment production predictions in the Dubračina catchment, Croatia, where several alternative land cover/use inputs were applied. They used three different land cover/use data sets: a CORINE land cover map, a Spatial Plan, and a Landsat 8 scene, and demonstrated the Gavrilović method sensitivity to different land cover/use inputs.…”

Section: Land Use/cover Change and Erosion Mitigation Measuresmentioning

confidence: 99%

Sanacije Krčkog mosta

Lakušić¹

2016

JCE

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Principal features of the non-smooth contact dynamics method, which served as basis for the LMGC90 software formulation, are presented in the paper. The objective of the paper is to present creation of a discrete model using the LMGC90 software. The discrete dome model of the St. Jacob cathedral in Šibenik was created, and dynamic behaviour of the dome was checked by time-history analysis. The results point to a highly nonlinear behaviour of the dome, which would be difficult to detect with the finite element method. The results also reveal critical points, i.e. the maximum displacement and contact force points along the dome. Diskretni model kupole katedrale svetoga Jakova u Šibeniku U radu su prikazane osnove metode neglatke kontaktne dinamike na temelju koje je formuliran programski paket LMGC90. Cilj rada je prezentirati postupak izrade diskretnog modela u programu LMGC90. Izrađen je diskretni model kupole katedrale sv. Jakova u Šibeniku i na njemu je provedena time-history analiza. Dobiveni rezultati upućuju na značajna nelinearna ponašanja kupole koja je teško obuhvatiti metodom konačnih elemenata. Rezultati upućuju na kritična mjesta, to jest locirana su područja maksimalnih pomaka i kontaktnih sila.

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Geohazard Assessment in the Eastern Serbia

Cited by 18 publications

References 6 publications

Use of enzymatic tools for biomonitoring inorganic pollution in aquatic sediments: a case study (Bor, Serbia)

Use of enzymatic tools for biomonitoring inorganic pollution in aquatic sediments: a case study (Bor, Serbia)

Power Talk for Multibus DC MicroGrids: Creating and Optimizing Communication Channels

Sanacije Krčkog mosta

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