DSpace Collection:
http://hdl.handle.net/10261/2857
20160529T23:05:34Z

Bayesian decision making in human collectives with binary choices
http://hdl.handle.net/10261/125756
Title: Bayesian decision making in human collectives with binary choices
Authors: Eguíluz, Víctor M.; Masuda, Naoki; FernándezGracia, Juan
Abstract: © 2015 Eguíluz et al. Here we focus on the description of the mechanisms behind the process of information aggregation and decision making, a basic step to understand emergent phenomena in society, such as trends, information spreading or the wisdom of crowds. In many situations, agents choose between discrete options.We analyze experimental data on binary opinion choices in humans. The data consists of two separate experiments in which humans answer questions with a binary response, where one is correct and the other is incorrect. The questions are answered without and with information on the answers of some previous participants. We find that a Bayesian approach captures the probability of choosing one of the answers. The influence of peers is uncorrelated with the difficulty of the question. The data is inconsistent with Weber's law, which states that the probability of choosing an option depends on the proportion of previous answers choosing that option and not on the total number of those answers. Last, the present Bayesian model fits reasonably well to the data as compared to some other previously proposed functions although the latter sometime perform slightly better than the Bayesian model. The asset of the present model is the simplicity and mechanistic explanation of the behavior.
20151125T13:05:10Z

Characterization of monoclonal gammopathy of undetermined significance by calorimetric analysis of blood serum proteome
http://hdl.handle.net/10261/123878
Title: Characterization of monoclonal gammopathy of undetermined significance by calorimetric analysis of blood serum proteome
Authors: Barceló, Francisca; Cerdà, Joan J.; Gutiérrez, Antonio; JiménezMarco, Teresa; Durán, Maria Antònia; Novo, Andrés; Ros, Teresa; Sampol, Antonia; Portugal, José
Abstract: © 2015 Barceló et al. Monoclonal gammopathy of undetermined significance (MGUS) is a premalignant proliferative disorder thatmay progress to multiplemyeloma, a malignant plasma cell neoplasia.We evaluated differential scanning calorimetry (DSC) as an experimental tool for differentiating serum samples of MGUS patients from healthy individuals. DSC thermograms can be used for monitoring changes in the serum proteome associated with MGUS. MGUS patients showed great variability in serum thermogram characteristics, which depended on the IgG, IgA or IgM isotypes and/or the κ or λ light chains. Thermogram feature parameters distinguished patients with MGUS from healthy people. Serum samples, named as nonMGUS, were also collected frompatients with subjacent immunological pathologies who were discarded of having MGUS through serum immunofixation. They were used to verify the sensitivity of DSC for discriminating MGUS from related blood dyscrasias. Only some DSC thermogram feature parameters differentiated, to a lesser extent, between MGUS and nonMGUS individuals.We contemplate DSC as a tool for early diagnosis and monitoring of MGUS.
20151027T09:18:51Z

Nonlinear Heat Conduction in Coulombblockaded Quantum Dots
http://hdl.handle.net/10261/117211
Title: Nonlinear Heat Conduction in Coulombblockaded Quantum Dots
Authors: Sierra, Miguel A.; Sánchez, David
Abstract: We analyze the heat current flowing across interacting quantum dots within the Coulomb blockade regime. Power can be generated by either voltage or temperature biases. In the former case, we find nonlinear contributions to the Peltier effect that are dominated by conventional Joule heating for sufficiently high voltages. In the latter case, the differential thermal conductance shows maxima or minima depending on the energy level position. Furthermore, we discuss departures from the KelvinOnsager reciprocity relation beyond linear response.
Description: 12th European Conference on Thermoelectrics. arXiv:1411.5231
20150626T07:35:38Z

Discording power of quantum evolutions
http://hdl.handle.net/10261/117207
Title: Discording power of quantum evolutions
Authors: Galve, Fernando; Plastina, Francesco; Paris, Matteo G. A.; Zambrini, Roberta
Abstract: We introduce the discording power of a unitary transformation, which assesses its capability to produce quantum discord, and analyze in detail the generation of discord by relevant classes of twoqubit gates. Our measure is based on the Cartan decomposition of twoqubit unitaries and on evaluating the maximum discord achievable by a unitary upon acting on classicalclassical states at fixed purity. We find that there exist gates which are perfect discorders for any value of purity Î¿, and that they belong to a class of operators that includes the âˆšSWAP. Other gates, even those universal for quantum computation, do not posses the same property: the CNOT, for example, is a perfect discorder only for states with low or unit purity, but not for intermediate values. The discording power of a twoqubit unitary also provides a generalization of the corresponding measure defined for entanglement to any value of the purity. Â© 2013 American Physical Society.
20150626T07:00:06Z