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Item type:Publication, An Effective Heuristic Method to Minimize Makespan and Flow Time in a Flow Shop Problem(Science and Information Organization, 2020-01-01)In this paper, it is presented a heuristic method for solving the multi-objective flow shop problem. The work carried out considers the simultaneous optimization of the makespan and the flow time; both objectives are essential in measuring the production system's performance since they aim to reduce the completion time of jobs, increase the efficiency of resources, and reduce waiting time in queue. The proposed method is an adaptation of multi-objective Newton's method, which is applied to problems with functions of continuous variables. In this adaptation, the method seeks to improve a sequence of jobs through local searches recursively. The computational experiments show the potential of the proposed method to solve medium-sized and large instances compared with other existing literature methods. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Multiharmonic correlations of different flow amplitudes in Pb-Pb collisions at sNN = 2.76 TeV(American Physical Society, 2021-08-27)The event-by-event correlations between three flow amplitudes are measured for the first time in Pb-Pb collisions, using higher-order symmetric cumulants. We find that different three-harmonic correlations develop during the collective evolution of the medium when compared to correlations that exist in the initial state. These new results cannot be interpreted in terms of previous lower-order flow measurements since contributions from two-harmonic correlations are explicitly removed in the new observables. A comparison to Monte Carlo simulations provides new and independent constraints for the initial conditions and system properties of nuclear matter created in heavy-ion collisions. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Long-Range Transverse-Momentum Correlations and Radial Flow in Pb-Pb Collisions at the LHC(American Physical Society, 2026-01-23)This Letter presents measurements of long-range transverse-momentum correlations using a new observable, v 0 ( p T ) , serving as a probe of event-by-event radial-flow fluctuations, the underlying radial expansion, and the medium's properties in heavy-ion collisions. Results are reported for inclusive charged particles, pions, kaons, and protons across various centrality intervals in Pb-Pb collisions at s NN = 5.02 TeV , recorded by the ALICE detector. A pseudorapidity-gap technique, similar to that used in anisotropic-flow studies, is employed to suppress short-range correlations. At low p T , a characteristic mass ordering consistent with hydrodynamic collective flow is observed. At higher p T ( > 3 GeV / c ), protons exhibit larger v 0 ( p T ) than pions and kaons, in agreement with expectations from quark-recombination models. Comparisons to viscous hydrodynamic calculations with varying bulk viscosity and equation of state demonstrate the sensitivity of the v 0 ( p T ) observable to these key medium properties. The findings establish v 0 ( p T ) as a valuable addition to the set of observables used in Bayesian analyses for extracting the transport properties and constraining the equation of state of strongly interacting matter, while also helping to systematically explore its sensitivity and impact within such global studies.22