1. Efficiency of the coagulation/flocculation method for the treatment of dyebath effluentsVera Golob, Aleksandra Vinder, Marjana Simonič, 2005, izvirni znanstveni članek Opis: Textile dyeing processes are among the most environmentunfriendly industrial processes, because they produce coloured wastewaters that are heavily polluted with dyes, textile auxiliaries and chemicals. The coagulation/flocculation method was studied as a wastewater treatment technique for the decolourization of residual dyebath effluents after dyeing cotton/polyamide blends using reactive and acid dyes. It was discovered that acombination of aluminium sulphate and a cationic organic flocculant yields an effective treatment for residual dyebath wastewaters since almost complete decolourization was achieved, TOC, COD, AOX, BOD and the anionic surfactants were reduced and the biodegradability was increased. Ključne besede: textile industry, reactive dyes, acid dyes, wastewater, čiščenje odpadnih vodwastewater treatment, flocculation, coagulation, ecological analyses, wastewater decoloration, Jartests Objavljeno: 01.06.2012; Ogledov: 1569; Prenosov: 70 Povezava na celotno besedilo 
2. Microeconomics : an integrated approachDavid Besanko, Ronald Ray Braeutigam, učbenik za višje in visoke šole Ključne besede: microeconomics, economic analyses, problematics, problem solving, theory of rational expectations, supply, demand, general equilibrium, consumer, opportunities, mathematical economy, inputoutput, costs, minimization, competitiveness, competitive advantage, market, application, monopolies, oligopolies, game theory, behavior, market structure, risk, informations, externalities, public goods, graphic methods, graph theory, textbooks, exercises, manuals Objavljeno: 01.06.2012; Ogledov: 1906; Prenosov: 34 Povezava na celotno besedilo 
3. Predicting civil religion at a crosscultural levelSergej Flere, Miran Lavrič, 2009, izvirni znanstveni članek Opis: The concept of civil religion has caught major attention among scholars studying the junction of religion and politics (J.J. Rousseau, E. Durkheim, R. Bellah). The notion focuses on the phenomenon of cultural contents sacralizing and ritualizing the ruling political institutions of a society, extending support to the integration of the political and social system at a cultural level. The notion of civil religion has recently been operationalized crossculturally, but light has not been shed upon its predictors. In this paper authoritarianism is tested as a predictor of civil religion crossculturally. Four student samples of Bosnian, Serbian, Slovenian and US students were analyzed. Very strong, significant associations between authoritarianism, as operationalized by a modified Lane scale, and civil religion were found in all cases. Moreover, upon introducing femininity, anxiety and gender into the analysis, a strong, dominant and significant impact on the part of authoritarianism was still found when civil religion was observed crossculturally. When the same predictors were applied to explaining general religiosity, authoritarianism fell short of being a significant predictor in most of the environments observed. Such results suggest an especially close link between civil religion and authoritarianism. Ključne besede: sociology of religion, civil religion, authoritarianism, religiosity, intercultural differences, religious orientation, Serbian orthodoxy, Slovenian catholicism, Bosnian Islam, crosscultural analyses, anxiety Objavljeno: 07.06.2012; Ogledov: 892; Prenosov: 201 Celotno besedilo (258,08 KB) Gradivo ima več datotek! Več...

4. Establishing the stochastic nature of intracellular calcium oscillations from experimental dataMatjaž Perc, Anne K. Green, C. Jane Dixon, Marko Marhl, 2008, izvirni znanstveni članek Opis: Calcium has been established as a key messenger in both intra and intercellular signaling. Experimentally observed intracellular calcium responses to different agonists show a variety of behaviors from simple spiking to complex oscillatory regimes. Here we study typical experimental traces of calcium oscillations in hepatocytes obtained in response to phenylephrine and ATP. The traces were analyzed with methods of nonlinear time series analysis in order to determine the stochastic/deterministic nature of the intracellular calcium oscillations. Despite the fact that the oscillations appear, visually, to be deterministic yet perturbed by noise, our analyses provide strong evidence that the measured calcium traces in hepatocytes are prevalently of stochastic nature. In particular, bursting calcium oscillations are temporally correlated Gaussian series distorted by a monotonic, instantaneous, timeindependent function, whilst the spiking behavior appears to have a dynamical nonlinear component whereby the overall determinism level is still low. The biological importance of this finding is discussed in relation to the mechanisms incorporated in mathematical models as well as the role of stochasticity and determinism at cellular and tissue levels which resemble typical statistical and thermodynamic effects in physics. Ključne besede: dynamic systems, stochastic processes, cellular signaling, calcium oscillations, time series analyses, noise, temporal correlation Objavljeno: 07.06.2012; Ogledov: 1136; Prenosov: 97 Povezava na celotno besedilo 
5. Application of elemental microanalysis to elucidate the role of spherites in the digestive gland of the helicid snail Chilostoma lefeburianaSaška Lipovšek Delakorda, Ilse LetofskyPapst, Tone Novak, Manuela Giovannelli, Ferdinand Hofer, Maria Anna Pabst, 2008, izvirni znanstveni članek Opis: In this case study we present an application of different analytical electron microscopic methods in biology, to elucidate their usefulness in such investigations. Using analytical electron microscopy, spherites in the digestive gland cells of the helicid snail Chilostoma lefeburiana were examined at three stages: just before the nonfeeding period of overwintering in November, in the middle of overwintering in February and at its end in March. A detailed characterization of changes in the elemental composition of the spherites was characterized by a combination of transmission electron microscopy (TEM), energy dispersive xray spectroscopy (EDXS), electron energyloss spectroscopy (EELS) and energy filtering TEM (EFTEM). During overwintering, the spherites passed the following changes. Before overwintering in November, they consisted of striking concentric layers of electrondense and electronlucent zones, while in February and March they showed clear empty zones between materials of different electron density. In November spherites, C, O, Ca, P, Cl, Fe, Si, Na, K, Mg and S were detected, whereas in February ones C, O, N, Cl, Si and S were found and only C, O, N, Si and Cl were detected in March spherites. It is suggested that the elements missing in February and March were used in different physiological processes during overwintering, like (1) the maintenance of the appropriate elemental composition of the internal environment, (2) accumulation of nontoxic waste materials that cannot be metabolized and (3) avoiding potential intoxication by contamination with toxic metals. Ključne besede: zoology, Chilostoma lefeburiana, snails, digestive gland, overwintering, spherites, elemental analyses, environmental pollution, chemical structures Objavljeno: 07.06.2012; Ogledov: 1072; Prenosov: 66 Povezava na celotno besedilo 
6. Review of experimental models for confirmation of mathematical models of gearsBoris Aberšek, Jože Flašker, 2008, izvirni znanstveni članek Opis: In order to calculate the service life as precisely and reliably as possible we need good mathematical models for describing loading, geometry, properties of materials and fracture mechanics parameters. It can be established whether a mathematical model is precise and reliable only by comparison of results of the method such as analytical methods in case of simple problems and experiment when real complex structure are deal with. Since gears and gearing belong to the second group, by correctly selected and developed test pieces and carefully planned experiments we obtained results with which we confirmed and justified the mathematical model for calculating mentioned parameters. To this end we will show in this paper series of experimental methods and test pieces used on the gears. Ključne besede: machine elements, gears, mathematical models, testing, experimental methods, numerical analyses Objavljeno: 07.06.2012; Ogledov: 870; Prenosov: 44 Povezava na celotno besedilo 
7. Singing of Neoconocephalus robustus as an example of deterministic chaos in insectsTina P. Benko, Matjaž Perc, 2007, izvirni znanstveni članek Opis: We use nonlinear time series analysis methods to analyse the dynamics of the soundproducing apparatus of the katydid Neoconocephalus robustus. We capture the dynamics by analysing a recording of the singing activity. First, we reconstruct the phase space from the sound recording and test it against determinism and stationarity. After confirming determinism and stationarity, we show that the maximal Lyapunov exponent of the series is positive, which is a strong indicator for the chaotic behaviour of the system. We discuss that methods of nonlinear time series analysis can yield instructive insights and foster the understanding of acoustic communication among insects. Ključne besede: chaotic systems, chaos, time series, time series analyses, insect sounds, katydid Objavljeno: 07.06.2012; Ogledov: 1183; Prenosov: 272 Celotno besedilo (1,05 MB) Gradivo ima več datotek! Več...

8. Thoughts out of noiseMatjaž Perc, 2006, izvirni znanstveni članek Opis: We study the effects of additive Gaussian noise on the behaviour of a simple spatially extended system, which is locally modelled by a nonlinear twodimensional iterated map describing neuronal dynamics. In particular, we focus on the ability of noise to induce spatially ordered patterns, i. e. the socalled noiseinduced pattern formation. For intermediate noise intensities, the spatially extended system exhibits ordered circular waves, thereby clearly manifesting the constructive role of random perturbations. The emergence of observed noiseinduced patterns is explained with simple arguments that are obtained by analysing the typical spatial scale of patterns evoked by various diffusion coefficients. Since discretetime systems are straightforward to implement and require modest computational capabilities, the present study describes one of the most fascinating and visually compelling examples of noiseinduced selforganization in nonlinear systems in an accessible way for graduate or even advanced undergraduate students attending a nonlinear dynamics course. Ključne besede: dynamic systems, chaotic systems, nonlinear dynamics, nonlinear systems, noise, nonlinear analyses Objavljeno: 07.06.2012; Ogledov: 937; Prenosov: 23 Povezava na celotno besedilo 
9. Introducing nonlinear time series analysis in undergraduate coursesMatjaž Perc, 2006, strokovni članek Opis: This article is written for undergraduate students and teachers who would like to get familiar with basic nonlinear time series analysis methods. We present a stepbystep study of a simple example and provide userfriendly programs that allow an easy reproduction of presented results. In particular, we study an artificial time series generated by the Lorenz system. The mutual information and false nearest neighbour method are explained in detail, and used to obtain the best possible attractor reconstruction. Subsequently, the times series is tested for stationarity and determinism, which are both important properties that assure correct interpretation of invariant quantities that can be extracted from the data set. Finally, as the most prominent invariant quantity that allows distinguishing between regular and chaotic behaviour, we calculate the maximal Lyapunov exponent. By following the above steps, we are able to convincingly determine that the Lorenz system is chaotic directly from the generated time series, without the need to use the differential equations. Throughout the paper, emphasis on clearcut guidance and a handson approach is given in order to make the reproduction of presented results possible also for undergraduates, and thus encourage them to get familiar with the presented theory. Ključne besede: nonlinear systems, nonlinear time series analyses, physics education Objavljeno: 07.06.2012; Ogledov: 866; Prenosov: 22 Povezava na celotno besedilo 
10. Jordan homomorphisms on triangular matricesDominik Benkovič, 2005, objavljeni povzetek znanstvenega prispevka na konferenci Ključne besede: mathematics, associative rings and algebras, functional analyses, derivation, Jordan derivation, antiderivation, triangular matrix algebra, higher derivations, homomorphisms Objavljeno: 07.06.2012; Ogledov: 971; Prenosov: 59 Povezava na celotno besedilo 