Showing papers by "University of Maribor published in 2006"
TL;DR: In this article, the effect of different extraction set-ups that influence the extraction efficiency of catechins and caffeine from green tea leaves (variety Fanning Belas, China) were studied using different aqueous and pure solvents (acetone, ethanol, methanol, acetonitrile, water), different temperatures (60, 80, 95 and 100°C) and times (5-240
425 citations
TL;DR: In this article, the authors studied the effects of additive spatiotemporal random variations, introduced to the payoffs of a spatial prisoner's dilemma game, on the evolution of cooperation and showed that explicit random payoff variations present a viable mechanism that promotes cooperation for defection temptation values substantially exceeding the one marking the transition point to homogeneity by deterministic payoffs.
Abstract: We study effects of additive spatiotemporal random variations, introduced to the payoffs of a spatial prisoner's dilemma game, on the evolution of cooperation. In the absence of explicit payoff variations the system exhibits a phase transition from a mixed state of cooperators and defectors to a homogenous state of defectors belonging to the directed percolation universality class. By introducing nonzero random variations to the payoffs, this phase transition can be reverted in a resonance-like manner depending on the variance of noise, thus marking coherence resonance in the system. We argue that explicit random payoff variations present a viable mechanism that promotes cooperation for defection temptation values substantially exceeding the one marking the transition point to homogeneity by deterministic payoffs.
258 citations
TL;DR: This paper developed a fairness theory perspective to explain the experience of being singled out for social undermining from supervisors and coworkers, and tested their predictions across four distinct social contexts, and concluded that attitudinal and behavioral reactions to undermining would be strongest when a correspondingly low level of undermining was found in the social context.
253 citations
TL;DR: An adaptive state controller was developed for a stabile pendulum, and in the same time optimal balancing of an inverted pendulum and a switching mechanism between swinging and balancing algorithm is proposed.
Abstract: The basic aim of the present work was to swing up a real pendulum from the pending position and to balance stably the pendulum at the upright position and further move the pendulum cart to a specified position on the pendulum rail in the shortest time. Different control strategies are compared and tested in simulations and in real-time experiments, where maximum acceleration of the pendulum pivot and length of the pendulum rail are limited. A comparison of fuzzy swinging algorithm with energy-based swinging strategies shows advantages of using fuzzy control theory in nonlinear real-time applications. An adaptive state controller was developed for a stabile, and in the same time optimal balancing of an inverted pendulum and a switching mechanism between swinging and balancing algorithm is proposed.
224 citations
218 citations
TL;DR: The first evidence of the decay B-→τ-ντ, using 414fb-1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider, was presented in this article.
Abstract: We present the first evidence of the decay B-→τ-ντ, using 414fb-1 of data collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B-→τ-ντ)=(1.79-0.49+0.56(stat) -0.51+0.46(syst))×10-4. This implies that fB=0.229-0.031+0.036(stat)-0. 037+0.034(syst)GeV and is the first direct measurement of this quantity. © 2006 The American Physical Society.
212 citations
11 Sep 2006
TL;DR: The performance of the self-adaptive differential evolution algorithm is evaluated on the set of 24 benchmark functions provided for the CEC2006 special session on constrained real parameter optimization.
Abstract: Differential Evolution (DE) has been shown to be a powerful evolutionary algorithm for global optimization in many real problems. Self-adaptation has been found to be high beneficial for adjusting control parameters during evolutionary process, especially when done without any user interaction. In this paper we investigate a self-adaptive differential evolution algorithm where more DE strategies are used and control parameters F and CR are self-adapted. The performance of the self-adaptive differential evolution algorithm is evaluated on the set of 24 benchmark functions provided for the CEC2006 special session on constrained real parameter optimization.
211 citations
TL;DR: In this article, the authors presented a method to detect the presence of brain tumors in the human brain using PhysRevLett, a Web of Science Record created on 2010-11-05, modified on 2017-05-12.
Abstract: Reference EPFL-ARTICLE-154577doi:10.1103/PhysRevLett.97.162001View record in Web of Science Record created on 2010-11-05, modified on 2017-05-12
183 citations
Tohoku Gakuin University1, University of Tokyo2, Budker Institute of Nuclear Physics3, University of Tsukuba4, University of Sydney5, University of Melbourne6, National Central University7, Polish Academy of Sciences8, University of Maribor9, Tohoku University10, Chonnam National University11, Gyeongsang National University12, Sungkyunkwan University13, Princeton University14, Virginia Tech15, Tata Institute of Fundamental Research16, Korea University17, Nagoya University18, Nara Women's University19, École Polytechnique Fédérale de Lausanne20, Chiba University21, Niigata University22, Kyungpook National University23, University of Cincinnati24, Yonsei University25, Goethe University Frankfurt26, Austrian Academy of Sciences27, Seoul National University28, University of Science and Technology of China29, National Taiwan University30, Tokyo Metropolitan University31, Hiroshima Institute of Technology32, Osaka City University33, Tokyo University of Agriculture and Technology34, Toho University35, Kanagawa University36, Shinshu University37, Panjab University, Chandigarh38, University of Nova Gorica39, Peking University40, Tokyo Institute of Technology41
TL;DR: In this paper, a candidate C-even charmonium state is observed in the vicinity of 3.93 GeV/c(2), which is the previously unobserved chi(')(c2), the 2(3)P(2) state.
Abstract: We report on a search for new resonant states in the process gamma gamma -> D (D) over bar. A candidate C-even charmonium state is observed in the vicinity of 3.93 GeV/c(2). The production rate and the angular distribution in the gamma gamma center-of-mass frame suggest that this state is the previously unobserved chi(')(c2), the 2(3)P(2) charmonium state.
183 citations
TL;DR: In this paper, the free energy of adsorption ΔGads were calculated in cases when the charge on the metal surface is negative with respect to the PZC, relatively high what is characteristically for the chemisorption.
172 citations
University of Illinois at Urbana–Champaign1, Tohoku Gakuin University2, University of Tokyo3, Budker Institute of Nuclear Physics4, University of Tsukuba5, University of Sydney6, University of Melbourne7, École Polytechnique Fédérale de Lausanne8, National Central University9, Polish Academy of Sciences10, University of Maribor11, National Taiwan University12, Chonnam National University13, Sungkyunkwan University14, Princeton University15, Virginia Tech16, Tata Institute of Fundamental Research17, University of Ljubljana18, Korea University19, Nagoya University20, Nara Women's University21, Yonsei University22, Chiba University23, Niigata University24, Tokyo Institute of Technology25, Seoul National University26, University of Cincinnati27, Panjab University, Chandigarh28, Goethe University Frankfurt29, University of Science and Technology of China30, Austrian Academy of Sciences31, Tokyo Metropolitan University32, Osaka University33, Osaka City University34, Tokyo University of Agriculture and Technology35, Toho University36, Kanagawa University37, Kyungpook National University38, Shinshu University39, University of Nova Gorica40, Peking University41, National United University42, Tohoku University43
TL;DR: The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector, which can be attributed to a transverse polarization of the primordial quarks.
Abstract: The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.
TL;DR: In this article, the fuel and fuel temperature influences are investigated experimentally in the mechanically controlled diesel fuel injection M system, and the minimum fuel temperature for safe engine operation is determined on the basis of the measurements of pressure drop through the fuel filter.
TL;DR: In this article, the authors studied the effects of slowly varying small-world topology and additive spatiotemporal random variations, introduced to the payoffs of a spatial prisoner's dilemma game, on the evolution of cooperation.
Abstract: We study effects of slowly varying small-world topology and additive spatiotemporal random variations, introduced to the payoffs of a spatial prisoner's dilemma game, on the evolution of cooperation. We show that there exists an optimal fraction of shortcut links, constituting the variable complex network of participating players of the game, for which noise-induced cooperation is resonantly enhanced, thus marking a double resonance phenomenon in the studied system. The double resonance is attributed to the time-dependence of the connectivity structure that induces a tendency towards the mean-field behaviour in the limit of random graphs. We argue that random payoff disturbances and complex network topology are two potent extrinsic factors able to boost cooperation, thus representing a viable escape hatch out of evolutionary stalemate.
Tata Institute of Fundamental Research1, University of Tokyo2, Budker Institute of Nuclear Physics3, University of Sydney4, National Central University5, Polish Academy of Sciences6, University of Maribor7, National Taiwan University8, Gyeongsang National University9, Sungkyunkwan University10, Princeton University11, University of Melbourne12, Virginia Tech13, University of Ljubljana14, Korea University15, Nagoya University16, Osaka University17, Tohoku Gakuin University18, Yonsei University19, Chiba University20, Niigata University21, University of Cincinnati22, Panjab University, Chandigarh23, Goethe University Frankfurt24, Austrian Academy of Sciences25, Tokyo Metropolitan University26, Tohoku University27, Hiroshima Institute of Technology28, Tokyo University of Agriculture and Technology29, Nara Women's University30, Toho University31, Kanagawa University32, École Polytechnique Fédérale de Lausanne33, University of Illinois at Urbana–Champaign34, University of Nova Gorica35, Saga University36, Osaka City University37, Peking University38, National United University39, Tokyo Institute of Technology40, University of Science and Technology of China41
TL;DR: In this article, the authors presented a method to solve the problem of the EPT problem in PhysRevLett, a Web of Science Record created on 2010-11-05, modified on 2017-12-10.
Abstract: Reference EPFL-ARTICLE-154578doi:10.1103/PhysRevLett.97.162002View record in Web of Science Record created on 2010-11-05, modified on 2017-12-10
TL;DR: It may be recommended to replace up to 15 wt% of cement by BA and to use such binder where a low strength of concrete elements is required, although the aggregate used for low strength concrete need not be of a very good quality.
TL;DR: In this article, the synthesis of fructose with fatty acid in organic medium was performed in a batch reactor at atmospheric pressure and the influence of different reaction parameters, such as different kinds of lipase preparations and organic solvents, biocatalyst concentration, molecular sieve concentration, temperature, stirring rate and the use of different fatty acids as acyl donors was studied.
TL;DR: Mozart's music, by activating task-relevant brain areas, enhances the learning of spatio-temporal rotation tasks and support priming explanation of the Mozart effect.
TL;DR: The paper contributes to the understanding of functional and performance related differences between Web services and RMI and their secure variants, WS-Security and R MI-SSL.
TL;DR: An appropriately pronounced chaotic environment can assure permanent domination of cooperation by full anonymity of players and without the aid of secondary strategies, thus designating chaotic payoff variations as a general and stand-alone mechanism for cooperation in the spatial prisoner's dilemma game.
Abstract: We introduce chaotic variations, modelled by a spatially extended Lorenz system, to the payoffs of the spatial prisoner's dilemma game and study their effects on the evolution of cooperation. We show that chaotic variations of appropriate amplitude promote cooperation over a wide range of payoff parameters at which defection is the only strategy in a sterile environment. An appropriately pronounced chaotic environment can assure permanent domination of cooperation by full anonymity of players and without the aid of secondary strategies, thus designating chaotic payoff variations as a general and stand-alone mechanism for cooperation in the spatial prisoner's dilemma game.
TL;DR: A neural network-based approach to complex optimization of cutting parameters by means of the neural networks taking into consideration the technological, economic and organizational limitations is proposed and developed to reach higher precision of the predicted results.
TL;DR: In this paper, the authors analyze the European transition economics and show that many time series of major indices exhibit (i) power-law correlations in their values, (ii) power law correlation in their magnitudes and (iii) an asymmetric probability distribution.
Abstract: We analyze the European transition economics and show that many time series of major indices exhibit (i) power-law correlations in their values, (ii) power-law correlations in their magnitudes and (iii) an asymmetric probability distribution. Applying the phase randomization procedure to these time series, we show that magnitude correlations completely vanish. We propose a stochastic model that can generate time series with features (i), (ii) and (iii), and we show by means of numerical simulations that this model is capable of reproducing these three features found in the empirical data.
TL;DR: The first observation of the decay B+/- --> f2(1270)K+/- with a statistical significance above 6sigma and first evidence for large direct CP violation in the B-/- --> rho(770)0K-+/- channel are observed.
Abstract: We report results on a Dalitz analysis of three-body charmless B{sup {+-}}{yields}K{sup {+-}}{pi}{sup {+-}}{pi}{sup {+-}} decay including searches for direct CP violation. We report the first observation of the decay B{sup {+-}}{yields}f{sub 2}(1270)K{sup {+-}} with a statistical significance above 6{sigma}. We also observe first evidence for large direct CP violation in the B{sup {+-}}{yields}{rho}(770){sup 0}K{sup {+-}} channel. The results are obtained with a data sample that contains 386x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.
Tohoku Gakuin University1, University of Tokyo2, University of Tsukuba3, University of Sydney4, Budker Institute of Nuclear Physics5, Polish Academy of Sciences6, University of Maribor7, National Central University8, Chonnam National University9, Sungkyunkwan University10, Princeton University11, University of Melbourne12, Virginia Tech13, University of Cincinnati14, Tata Institute of Fundamental Research15, University of Ljubljana16, Nagoya University17, National Taiwan University18, Yonsei University19, Korea University20, Chiba University21, Niigata University22, Tokyo Institute of Technology23, Kyungpook National University24, Goethe University Frankfurt25, University of Science and Technology of China26, Austrian Academy of Sciences27, Osaka University28, Tohoku University29, Hiroshima Institute of Technology30, Osaka City University31, Tokyo University of Agriculture and Technology32, Toho University33, Kanagawa University34, École Polytechnique Fédérale de Lausanne35, Panjab University, Chandigarh36, University of Nova Gorica37, Peking University38, National United University39
TL;DR: In this article, an analysis of charm quark fragmentation at 10.6 GeV is presented, based on a data sample of 103 fb{sup -1} collected by the Belle detector at the KEKB accelerator.
Abstract: We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample of 103 fb{sup -1} collected by the Belle detector at the KEKB accelerator. We consider fragmentation into the main charmed hadron ground states, namely D{sup 0},D{sup +},D{sub s}{sup +} and {lambda}{sub c}{sup +}, as well as the excited states D*{sup 0} and D*{sup +}. The fragmentation functions are important to measure as they describe processes at a low energy scale, where calculations in perturbation theory lead to large uncertainties. Fragmentation functions can also be used as input distributions for Monte Carlo generators. Additionally, we determine the average number of these charmed hadrons produced per B decay at the {upsilon}(4S) resonance and measure the distribution of their production angle in e{sup +}e{sup -} annihilation events and in B decays.
TL;DR: The first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in A9/A7 and A10/ a7 in B --> K*l+l-, where l represents an electron or a muon is reported.
Abstract: We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients A{sub 9}/A{sub 7} and A{sub 10}/A{sub 7} in B{yields}K{sup *}l{sup +}l{sup -}, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4{sigma}. The results are obtained from a data sample containing 386x10{sup 6} BB pairs that were collected on the {upsilon}(4S) resonance with the Belle detector at the KEKB asymmetric-energy e{sup +}e{sup -} collider.
TL;DR: In this paper, the fuel and fuel temperature influences are investigated experimentally in the mechanically controlled diesel fuel injection M system, and the minimum fuel temperature for safe engine operation is determined on the basis of the measurements of pressure drop through the fuel filter.
Abstract: This paper deals with injection characteristics using different fuels at different fuel temperatures. The fuels under consideration are neat biodiesel from rapeseed oil and some blends with diesel as well as neat mineral diesel D2. The fuel and fuel temperature influences are investigated experimentally in the mechanically controlled diesel fuel injection M system. At first, attention is focused on the injection characteristics, especially on fuelling, mean injection rate, mean injection pressure, injection timing, injection delay, and injection duration, which influence the most important engine characteristics. Furthermore, the influence of fuel temperature is investigated. On the basis of the measurements of pressure drop through the fuel filter, the minimum fuel temperature for safe engine operation is determined.
TL;DR: Given the tolerance to the constituents and concentration of dye baths, the enzyme proved to be a promising tool for their treatment.
TL;DR: This brief describes this ringing phenomenon and the use of an RC-RCD clamp circuit for damping the clamp diode's oscillation, capable for improving a flyback converter's power ratio.
Abstract: An RCD clamp circuit is usually used in flyback converters, in order to limit the voltage spikes caused by leakage transformer inductance. Oscillation ringing appears due to the clamp diode, which deteriorates the converter's power rate. This brief describes this ringing phenomenon and the use of an RC-RCD clamp circuit for damping the clamp diode's oscillation. This clamp circuit is capable for improving a flyback converter's power ratio.
TL;DR: The impact of pre‐hospital trauma care by emergency physicians on mortality from severe traumatic brain injury (TBI) and a 180‐day Glasgow Outcome Scale (GOS) is evaluated.
Abstract: Background: The role of pre-hospital trauma care and the effect of pre-hospital rapid sequence intubation (RSI) on patient outcome are still not clear. This study evaluated the impact of prehospital trauma care by emergency physicians (EP) on mortality from severe traumatic brain injury (TBI) and a 180-day Glasgow Outcome Scale (GOS). Methods: A 48-month parallel non-controlled cohort study compared a group of 64 patients with severe TBI [Glasgow Coma Scale (GCS) 15] who received pre-hospital advanced life support (ALS) with RSI and were transported to the hospital by EPs (EP group), with a group of 60 patients who did not receive pre-hospital ALS with RSI [emergency medical technicians (EMT) group]. Results: There were no significant statistical differences between the groups in age (P ¼ 0.79), mechanism of injury (P ¼ 0.68), gender (P ¼ 0.82), initial GCS (P ¼ 0.63), initial SaO2 in the field (P ¼ 0.63), initial systolic blood pressure in the field (P ¼ 0.47) and on-scene time (P ¼ 0.41). In the EP group, there was significantly better first hour survival (97% vs. 79%, P ¼ 0.02), first day survival (90% vs. 72%, P ¼ 0.02), better functional outcome (GOS 4‐5: 53% vs. 33%, P < 0.01; GOS 2‐3: 8% vs. 20%, P < 0.01) and shortened hospitalization time in intensive care unit (ICU) (P ¼ 0.03) and other departments (P ¼ 0.04). In total hospital mortality, we detected no differences between both groups [EP group: 40% (95% CI: 34‐45%) vs.EMT group 42% (95% CI: 36‐47%, P ¼ 0.76], except in a subgroup of patients with GCS 6‐8 where there was significantly lower total hospital mortality in the EP group (24% vs. 78%, P < 0.01). Conclusion: After starting the trauma care system with emergency physicians in our region, there was a decrease in the number of deaths on hospital admission, a reduction in hospital mortality in the GCS group 6‐8, a change in the temporal distribution of deaths, an improvement in functional neurological outcome and shortened hospitalization time.
TL;DR: In this paper, the influence of biodiesel on output characteristics of a diesel engine and optimal timing setup for its injection pump was studied by running experiments on an NA diesel bus engine MAN D2 2566 with a direct-injection M system.
Abstract: This paper discusses the influence of biodiesel on output characteristics of a diesel engine and optimal timing setup for its injection pump. The influence of biodiesel is studied by running experiments on an NA diesel bus engine MAN D2 2566 with a direct-injection M system. The fuel used is biodiesel produced from rapeseed. Special attention is focused on the determination of the optimal injection-pump timing with respect to engine harmful emissions, engine fuel consumption, and other engine performance parameters. These engine characteristics are compared against those obtained using conventional D2 diesel. Experiments with biodiesel and D2 are run on several engine operating regimes. The engine was monitored for possible operation problems and carefully examined after the tests. The results obtained are presented and analyzed. It is shown that with carefully optimized timing of the pump, the harmful emission of NOx, smoke, HC, and CO can be reduced essentially by keeping other engine characteristics wi...
TL;DR: In this paper, it was shown that the distinguishing number of the square and higher powers of a connected graph G ≠ K2, K3 with respect to the Cartesian product is 2.
Abstract: The distinguishing number D(G) of a graph is the least integer d such that there is a d-labeling of the vertices of G that is not preserved by any nontrivial automorphism of G. We show that the distinguishing number of the square and higher powers of a connected graph G ≠ K2, K3 with respect to the Cartesian product is 2. This result strengthens results of Albertson [Electron J Combin, 12 (2005), nN17] on powers of prime graphs, and results of KlavŽar and Zhu [Eu J Combin, to appear]. More generally, we also prove that d(G s H) = 2 if G and H are relatively prime and |H| ≤ |G| < 2|H| - |H|. Under additional conditions similar results hold for powers of graphs with respect to the strong and the direct product. © 2006 Wiley Periodicals, Inc. J Graph Theory 53: 250260, 2006