Showing papers by "University of Maribor published in 2007"
TL;DR: In this article, the authors provide results of the literature survey and summarizes the definitions of the terms, focusing on the environmental engineering field. And a hierarchical classification of terms and their relationships has been based on a layer format presented graphically.
908 citations
TL;DR: A novel decomposition technique suitable for blind separation of linear mixtures of signals comprising finite-length symbols that approaches Bayesian optimal linear minimum mean square error estimator and is, hence, significantly noise resistant.
Abstract: This paper studies a novel decomposition technique, suitable for blind separation of linear mixtures of signals comprising finite-length symbols. The observed symbols are first modeled as channel responses in a multiple-input-multiple-output (MIMO) model, while the channel inputs are conceptually considered sparse positive pulse trains carrying the information about the symbol arising times. Our decomposition approach compensates channel responses and aims at reconstructing the input pulse trains directly. The algorithm is derived first for the overdetermined noiseless MIMO case. A generalized scheme is then provided for the underdetermined mixtures in noisy environments. Although blind, the proposed technique approaches Bayesian optimal linear minimum mean square error estimator and is, hence, significantly noise resistant. The results of simulation tests prove it can be applied to considerably underdetermined convolutive mixtures and even to the mixtures of moderately correlated input pulse trains, with their cross-correlation up to 10% of its maximum possible value.
417 citations
University of South Florida1, University of Navarra2, University of Ottawa3, Lancaster University4, University of Waikato5, Florida International University6, Pontifical Catholic University of Chile7, University of National and World Economy8, Griffith University9, University of Piura10, Austral University11, Peking University12, National Central University13, University of Puerto Rico14, University of Maribor15, Babeș-Bolyai University16, National Academy of Public Administration17, Tokyo Keizai University18, University of California, Santa Cruz19, Lingnan University20
TL;DR: In this article, a study of work interference with family (WIF) among managers is described, contrasting four clusters of countries, one of which is individualistic (Anglo) and three of which are collectivistic (Asia, East Europe, and Latin America).
Abstract: A study of work interference with family (WIF) among managers is described, contrasting four clusters of countries, one of which is individualistic (Anglo) and three of which are collectivistic (Asia, East Europe, and Latin America). Country cluster (Anglo vs. each of the others) moderated the relation of work demands with strain-based WIF, with the Anglo country cluster having the strongest relationships. Country cluster moderated some of the relationships of strain-based WIF with both job satisfaction and turnover intentions, with Anglos showing the strongest relationships. Cluster differences in domestic help were ruled out as the possible explanation for these moderator results.
413 citations
University of Tokyo1, Budker Institute of Nuclear Physics2, École Polytechnique Fédérale de Lausanne3, University of Sydney4, University of Melbourne5, Panjab University, Chandigarh6, National United University7, Polish Academy of Sciences8, University of Maribor9, National Taiwan University10, National Central University11, Hanyang University12, Yonsei University13, Gyeongsang National University14, Sungkyunkwan University15, Virginia Tech16, University of Cincinnati17, Tata Institute of Fundamental Research18, Korea University19, Nagoya University20, Nara Women's University21, Osaka University22, Tohoku Gakuin University23, Kyungpook National University24, Saga University25, Tokyo Institute of Technology26, Chiba University27, Niigata University28, Seoul National University29, Graduate University for Advanced Studies30, University of Ljubljana31, University of Giessen32, Austrian Academy of Sciences33, Osaka City University34, Tokyo University of Agriculture and Technology35, Toho University36, Kanagawa University37, University of Nova Gorica38, Tokyo Metropolitan University39, Tohoku University40, University of Science and Technology of China41
TL;DR: In this paper, the authors presented a method to solve the problem of the EKF problem in PhysRevLett, a Web of Science Record created on 2010-11-05, modified on 2017-12-10.
Abstract: Reference EPFL-ARTICLE-154576doi:10.1103/PhysRevLett.99.142002View record in Web of Science Record created on 2010-11-05, modified on 2017-12-10
308 citations
University of Sydney1, University of Tokyo2, Budker Institute of Nuclear Physics3, École Polytechnique Fédérale de Lausanne4, University of Cincinnati5, University of Melbourne6, Polish Academy of Sciences7, University of Maribor8, Fu Jen Catholic University9, National Taiwan University10, National Central University11, Hanyang University12, Yonsei University13, Sungkyunkwan University14, Virginia Tech15, University of Ljubljana16, Korea University17, Nagoya University18, Nara Women's University19, Osaka University20, Tohoku Gakuin University21, Kyungpook National University22, Chiba University23, Niigata University24, Graduate University for Advanced Studies25, Panjab University, Chandigarh26, Seoul National University27, Austrian Academy of Sciences28, Princeton University29, Hiroshima Institute of Technology30, Tokyo University of Agriculture and Technology31, Toho University32, Kanagawa University33, University of Illinois at Urbana–Champaign34, Tokyo Metropolitan University35, Osaka City University36, National United University37, Tohoku University38, University of Science and Technology of China39
TL;DR: In this article, the authors measured the cross section for e{sup +}e{sup -}{yields}{pi}{sup +}{pi {sup -}J/{psi} between 3.8 and 5.5 GeV/c{sup 2} using a 548 fb{sup 1} data sample collected on or near the {upsilon}(4S) resonance with the Belle detector at KEKB.
Abstract: The cross section for e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}J/{psi} between 3.8 and 5.5 GeV/c{sup 2} is measured using a 548 fb{sup -1} data sample collected on or near the {upsilon}(4S) resonance with the Belle detector at KEKB. A peak near 4.25 GeV/c{sup 2}, corresponding to the so called Y(4260), is observed. In addition, there is another cluster of events at around 4.05 GeV/c{sup 2}. A fit using two interfering Breit-Wigner shapes describes the data better than one that uses only the Y(4260), especially for the lower-mass side of the 4.25 GeV enhancement.
297 citations
TL;DR: The optimal interplay between a localized source of weak rhythmic activity and the response of the whole array demands a delicate balance between the strength of excitation transfer and the effectiveness of the network structure to support it.
Abstract: We show that the correlation between the frequency of subthreshold pacemaker activity and the response of an excitable array is resonantly dependent on the intensity of additive spatiotemporal noise. Thereby, the effect of the underlying network, defining the interactions among excitable units, largely depends on the coupling strength. Only for intermediate coupling strengths is the small world property able to enhance the stochastic resonance, whereas for smaller and larger couplings the impact of the transition from diffusive to random networks is less profound. Thus, the optimal interplay between a localized source of weak rhythmic activity and the response of the whole array demands a delicate balance between the strength of excitation transfer and the effectiveness of the network structure to support it.
256 citations
TL;DR: This is the first report on a bacterial toxin that uses eukaryotic signals for induced autoproteolysis to deliver its toxic domain into the cytosol of target cells and an integrated model for the uptake and inositolphosphate-induced activation of toxin B is presented.
Abstract: Clostridium difficile, the causative agent of nosocomial antibiotic-associated diarrhoea and pseudomembranous colitis, possesses two main virulence factors: the large clostridial cytotoxins A and B It has been proposed that toxin B is cleaved by a cytosolic factor of the eukaryotic target cell during its cellular uptake Here we report that cleavage of not only toxin B, but also all other large clostridial cytotoxins, is an autocatalytic process dependent on host cytosolic inositolphosphate cofactors A covalent inhibitor of aspartate proteases, 1,2-epoxy-3-(p-nitrophenoxy)propane, completely blocked toxin B function on cultured cells and was used to identify its catalytically active protease site To our knowledge this is the first report on a bacterial toxin that uses eukaryotic signals for induced autoproteolysis to deliver its toxic domain into the cytosol of target cells On the basis of our data, we present an integrated model for the uptake and inositolphosphate-induced activation of toxin B
249 citations
TL;DR: In this article, the antioxidant and antibacterial properties of guarana (Paullinia cupana) seed extracts were determined, and the seeds were extracted with water, methanol, 35% acetone and 60% ethanol at room and at boiling (TB) temperature of solvent.
228 citations
15 Feb 2007
TL;DR: This paper presents differential evolution algorithms, which use different adaptive or self-adaptive mechanisms applied to the control parameters, and detailed performance comparisons of these algorithms on the benchmark functions are outlined.
Abstract: Differential evolution (DE) has been shown to be a simple, yet powerful, evolutionary algorithm for global optimization for many real problems. Adaptation, especially self-adaptation, has been found to be highly beneficial for adjusting control parameters, especially when done without any user interaction. This paper presents differential evolution algorithms, which use different adaptive or self-adaptive mechanisms applied to the control parameters. Detailed performance comparisons of these algorithms on the benchmark functions are outlined.
227 citations
KEK1, University of Tokyo2, Budker Institute of Nuclear Physics3, University of Tsukuba4, Tata Institute of Fundamental Research5, University of Sydney6, University of Maribor7, Polish Academy of Sciences8, National Taiwan University9, National Central University10, Chonnam National University11, Gyeongsang National University12, Sungkyunkwan University13, Princeton University14, University of Melbourne15, Virginia Tech16, University of Cincinnati17, University of Ljubljana18, Korea University19, Shinshu University20, Nagoya University21, Nara Women's University22, École Polytechnique Fédérale de Lausanne23, Tohoku Gakuin University24, Niigata University25, Tokyo Institute of Technology26, Kyungpook National University27, Goethe University Frankfurt28, Austrian Academy of Sciences29, Tokyo Metropolitan University30, Tohoku University31, Hiroshima Institute of Technology32, Osaka City University33, Tokyo University of Agriculture and Technology34, Toho University35, Kanagawa University36, Peking University37, National United University38, University of Science and Technology of China39
TL;DR: The first observation of a charmonium-like state recoiling from the $J/\ensuremath{\psi}$ in the inclusive process was reported in this paper.
Abstract: We report the first observation of a charmoniumlike state recoiling from the $J/\ensuremath{\psi}$ in the inclusive process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}+\mathrm{\text{anything}}$ at a mass of $(3.943\ifmmode\pm\else\textpm\fi{}0.006\ifmmode\pm\else\textpm\fi{}0.006)\text{ }\text{ }\mathrm{GeV}/{c}^{2}$. We also observe the decay of this state into ${D}^{*}\overline{D}$ and determine its intrinsic width to be less than $52\text{ }\text{ }\mathrm{MeV}/{c}^{2}$ at the 90% C.L. These results are obtained from a $357\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected with the Belle detector near the $\ensuremath{\Upsilon}(4S)$ resonance, at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider.
206 citations
TL;DR: Reports have shown a marked overlap between isolates from calves and humans, including two of the predominant outbreak types, 027 and 017, suggesting that food could be involved in the transmission of C. difficile from animals to humans.
TL;DR: In this article, the authors highlight important documents and discuss definitions of the term education for sustainable development, in order to incorporate sustainability principles into university activities, including continuous feedback loop (Deming spiral).
Abstract: Nowadays, the principles of sustainable development are becoming increasingly important and universities are acting as agents in promoting these principles within society. In the future, universities will inevitably play crucial role in propagating these principles. This paper highlights important documents and discusses definitions of the term education for sustainable development. Elements, based on continuous feedback loop (Deming spiral) are discussed, in order to incorporate sustainability principles into university activities. The University of Maribor has been used as a case study to test the effectiveness of the proposed integration of sustainable development principles.
TL;DR: In this article, the results of several studies of the Λc+π+π-X final state in continuum e+e- annihilation data collected by the Belle detector were reported.
Abstract: We report the results of several studies of the Λc+π+π-X final state in continuum e+e- annihilation data collected by the Belle detector. An analysis of angular distributions in Λc(2880)+→Σc(2455)0, ++π+,- decays strongly favors a Λc(2880)+ spin assignment of 52 over 32 or 12. We find evidence for Λc(2880)+→Σc(2520)0,++π+,- decay and measure the ratio of Λc(2880)+ partial widths Γ(Σc(2520)π)/Γ(Σc(2455)π)=0.225±0. 062±0.025. This value favors the Λc(2880)+ spin-parity assignment of 52+ over 52-. We also report the first observation of Λc(2940) +→Σc(2455)0,++π+,- decay and measure Λc(2880)+ and Λc(2940)+ mass and width parameters. These studies are based on a 553fb-1 data sample collected at or near the Υ(4S) resonance at the KEKB collider. © 2007 The American Physical Society.
TL;DR: Modified hydrophobic silica aerogels are excellent adsorbents for different toxic organic compounds from water and exhibit capacities which are from 15 to 400 times higher for all tested compounds.
TL;DR: Using this solution, a digital-signal-processor-based remote control laboratory for teaching purposes has been realized and this remote laboratory enables the remote users to easily interact with a set of physical control experiments through the Internet.
Abstract: This paper presents a framework for rapid remote experiment implementation in the field of automatic control. The proposed solution is based on in-house developed embedded control hardware and two commercially available software packages. MATLAB/Simulink is used for rapid experiment control algorithm development, while LabVIEW is used for the user front-end and remote control. A combination of presented hardware and software solutions enables the rapid and easy creation of different interactive remote control experiments. Using this solution, a digital-signal-processor-based remote control laboratory for teaching purposes has been realized. This remote laboratory enables the remote users to easily interact with a set of physical control experiments through the Internet. In the friendly user interface, the remote user can change predefined system parameters and observe system response in textual, graphical, or video format. In addition, this remote laboratory includes a booking system, which enables remote users to book experiments in advance.
TL;DR: In this paper, an alternative model for fitting electrochemical impedance spectra of protective coatings is proposed, which describes broadening of the semicircle in the complex plane, in the absence of corrosion reactions.
TL;DR: It was shown for the first time that probiotic and other lactic bacteria exhibit an antiviral activity in a cell culture model.
TL;DR: It is shown that the temporal order can be greatly enhanced by the introduction of small-world connectivity, whereby the effect increases with the increasing fraction of introduced shortcut links, and that the introducing of long-range couplings induces disorder of otherwise ordered, spiral-wave-like, noise-induced patterns.
Abstract: We present an overview of possible effects of small-world connectivity on noise-induced temporal and spatial order in a two-dimensional network of excitable neural media with FitzHugh–Nagumo local dynamics. Small-world networks are characterized by a given fraction of so-called long-range couplings or shortcut links that connect distant units of the system, while all other units are coupled in a diffusive-like manner. Interestingly, already a small fraction of these long-range couplings can have wide-ranging effects on the temporal as well as spatial noise-induced dynamics of the system. Here we present two main effects. First, we show that the temporal order, characterized by the autocorrelation of a firing-rate function, can be greatly enhanced by the introduction of small-world connectivity, whereby the effect increases with the increasing fraction of introduced shortcut links. Second, we show that the introduction of long-range couplings induces disorder of otherwise ordered, spiral-wave-like, noise-induced patterns that can be observed by exclusive diffusive connectivity of spatial units. Thereby, already a small fraction of shortcut links is sufficient to destroy coherent pattern formation in the media. Although the two results seem contradictive, we provide an explanation considering the inherent scale-free nature of small-world networks, which on one hand, facilitates signal transduction and thus temporal order in the system, whilst on the other hand, disrupts the internal spatial scale of the media thereby hindering the existence of coherent wave-like patterns. Additionally, the importance of spatially versus temporally ordered neural network functioning is discussed.
TL;DR: In this paper, the authors study the impact of stochastic payoff variations with different distributions on the evolution of cooperation in the spatial prisoner's dilemma game and find that Gaussian-distributed payoff variations are most successful in promoting cooperation irrespective of the temptation to defect.
Abstract: We study the impact of stochastic payoff variations with different distributions on the evolution of cooperation in the spatial prisoner's dilemma game. We find that Gaussian-distributed payoff variations are most successful in promoting cooperation irrespective of the temptation to defect. In particular, the facilitative effect of noise on the evolution of cooperation decreases steadily as the frequency of rare events increases. Findings are explained via an analysis of local payoff ranking violations. The relevance of results for economics and sociology is discussed.
TL;DR: In this article, the authors explored whether significantly different growth aspirations of early stage entrepreneurs in Slovenia, compared to those in Hungary and Croatia, are also accompanied by significantly different opportunity recognition, cultural support for entrepreneurship and self-efficacy.
Abstract: Based on GEM data this paper explores whether significantly different growth aspirations of early stage entrepreneurs in Slovenia, compared to those in Hungary and Croatia, are also accompanied by significantly different opportunity recognition, cultural support for entrepreneurship and self-efficacy. Our results suggest that a higher degree of alertness to unexploited perceived opportunities, and cultural support for entrepreneurial motivation may be the cause of higher growth aspirations of Slovenian early stage entrepreneurs, while self-efficacy with regard to entrepreneurial skills, knowledge and experience was not found to be crucial.
TL;DR: In this paper, a synthetically prepared reactive dye print wastewater, mimicking real wastewater obtained from a local textile mill, was treated by nanofiltration using an NFT-50 membrane in a plate and frame module configuration at different cross-flow velocities (0.4, 0.6 and 0.8 m/s) and pressures (2-15 bar).
TL;DR: It is found that the potential bystander in the authors' community is generally poorly educated in performing CPR, but willing to gain knowledge and skills in BLS and to follow dispatchers instructions on how to perform CPR.
TL;DR: In this article, a statistical analysis of empirical data from Slovenian companies showed that companies with innovation-strategic orientation are not significantly more successful in many aspects regarding their innovation capability and sustained competitive advantage compared to companies with quality-and cost-strategies.
TL;DR: In this article, the mathematical model of calculation of thermophysical properties for nanofluids on the basis of statistical nanomechanics is presented, and the analytical results obtained by statistical mechanics are compared with the experimental data and show relatively good agreement.
TL;DR: A very good agreement of simulation and real crash tests results was observed, which justifies the use of computer simulations in the process of development and certification of road safety barriers.
TL;DR: A six-species Lotka-Volterra-type system when each species has two superior and two inferior partners is studied, revealing an unexpected nonmonotonous dependence of alliance survival on the difference of alliance-specific invasion rates.
Abstract: We study a six-species Lotka-Volterra-type system on different two-dimensional lattices when each species has two superior and two inferior partners. The invasion rates from predator sites to a randomly chosen neighboring prey site depend on the predator-prey pair, whereby cyclic symmetries within the two three-species defensive alliances are conserved. Monte Carlo simulations reveal an unexpected nonmonotonous dependence of alliance survival on the difference of alliance-specific invasion rates. This behavior is qualitatively reproduced by a four-point mean-field approximation. The study addresses fundamental problems of stability for the competition of two defensive alliances and thus has important implications in natural and social sciences.
TL;DR: Sonochemical decolouration was substantially depressed by the addition of 2-methyl-2-propanol as a radical scavenger, which suggests radical-induced reactions in the solution, and indicates that ultrasound is rather inefficient in overall degradation, when used alone.
TL;DR: In this article, a new position tracking control algorithm based on a sliding-mode control that is able to deal with nonlinear-friction phenomenon and compliance and elasticity introduced by force transmission through the belt and nonlinear friction phenomenon is proposed.
Abstract: Accurate position-tracking control in a belt-driven servomechanism can experience vibrations and large tracking errors due to compliance and elasticity introduced by force transmission through the belt and nonlinear-friction phenomenon. In this paper, a new control algorithm which is based on a sliding-mode control that is able to deal with these problems is proposed. In order to further optimize position-tracking performance, the control scheme has been extended by an asymptotic disturbance observer. It has been proven that robust and vibration-free operation of a linear-belt-driven system can be achieved. The experiments presented in this paper show improved position-tracking error response while maintaining vibration suppression.
TL;DR: In this paper, an open-cellular monolithic cross-linked polymers from 2-hydroxyethyl methacrylate (2HEM) was used to obtain porosity templates with void diameters between 550 nm and 18 μm.
Abstract: Preparation of highly porous (up to 80% pore volume) open-cellular monolithic cross-linked polymers from 2-hydroxyethyl methacrylate is reported. Oil-in-water and water-in-oil high internal phase emulsions are applied as porosity templates, resulting in an interconnected porous structure with void diameters between 550 nm and 18 μm. Significantly larger voids were obtained in the case of oil-in-water emulsions (between 5 and 18 μm) as opposed to water in oil emulsions (approx 600 nm). Controlled coarsening exploiting limited kinetical stability of emulsions was used to obtain monoliths with larger voids, diameters being enlarged 3-fold.
TL;DR: In this article, the decay τ − → K S π − ν τ using a 351 −fb −1 data sample collected with the Belle detector is analyzed based on 53, 110 lepton-tagged signal events.