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In this paper, we present an algorithm suitable for analysing the variance of panel data when some observations are either given in grouped form or are missed. The analysis is carried out from the perspective of ANOVA panel data models with gene[...]texto impreso
Consider the loglinear model for categorical data under the assumption of multinomial sampling. We are interested in testing between various hypotheses on the parameter space when we have some hypotheses relating to the parameters of the models [...]texto impreso
Woollings, Tim ; Barriopedro Cepero, David ; Methven, John ; Seok-Woo, Son ; Martius, Olivia ; Harvey, Ben ; Sillmann, Jana ; Lupo, Anthony R. ; Seneviratne, Sonia | Springer Heidelberg | 2018-09Purpose of Review Atmospheric blocking events represent some of the most high-impact weather patterns in the mid-latitudes, yet they have often been a cause for concern in future climate projections. There has been low confidence in predicted fu[...]texto impreso
This paper reviews the current knowledge of climatic risks and impacts in South Asia associated with anthropogenic warming levels of 1.5-4 A degrees C above pre-industrial values in the twenty-first century. It is based on the World Bank Report [...]texto impreso
Morales González, Domingo ; Pardo Llorente, Leandro ; Pardo Llorente, María del Carmen ; Vadja, Igor | Springer Heidelberg | 2000-12A generalization of the Wald statistic for testing composite hypotheses is suggested for dependent data from exponential models which include Levy processes and diffusion fields. The generalized statistic is proved to be asymptotically chi-squar[...]texto impreso
Although there is not a complete "proof" of the second law of thermodynamics based on microscopic dynamics, two properties of Hamiltonian systems have been used to prove the impossibility of work extraction from a single thermal reservoir: Liouv[...]texto impreso
Arganda, E. ; Arqueros Martínez, Fernando ; Blanco Ramos, Francisco ; García Pinto, Diego ; Minaya Flores, Ignacio Andrés ; Ortiz Ramis, Montserrat ; Rosado Vélez, Jaime ; Vázquez Peñas, José Ramón | Springer Heidelberg | 2012-08The energy spectrum of ultra-high energy cosmic rays above 10(18)eV is measured using the hybrid events collected by the Pierre Auger Observatory between November 2005 and September 2010. The large exposure of the Observatory allows the measurem[...]texto impreso
We present a theoretical description of a system of many spins strongly coupled to a bosonic chain. We rely on the use of a spin-wave theory describing the Gaussian fluctuations around the mean-field solution, and focus on spin-boson chains aris[...]texto impreso
Ibort, A. ; Marmo, G. ; Rodríguez González, Miguel Ángel ; Tempesta, Piergiulio | Springer Heidelberg | 2019-10We present an algebraic formulation of the notion of integrability of dynamical systems, based on a nilpotency property of its flow: It can be explicitly described as a polynomial on its evolution parameter. Such a property is established in a p[...]texto impreso
Paparo, G.D. ; Müller, Markus ; Comellas, F. ; Martín-Delgado Alcántara, Miguel Ángel | Springer Heidelberg | 2014-07-22We review the main findings on the ranking capabilities of the recently proposed Quantum PageRank algorithm [1, 2] applied to large complex networks. The algorithm has been shown to identify unambiguously the underlying topology of the network a[...]texto impreso
Baity Jesi, Marco ; Fernández Pérez, Luis Antonio ; Martín Mayor, Víctor ; Muñoz Sudupe, Antonio ; otros, ... | Springer Heidelberg | 2012-08We describe Janus, a massively parallel FPGA-based computer optimized for the simulation of spin glasses, theoretical models for the behavior of glassy materials. FPGAs (as compared to GPUs or many-core processors) provide a complementary approa[...]texto impreso
Statistical techniques are used in all branches of science to determine the feasibility of quantitative hypotheses. One of the most basic applications of statistical techniques in comparative analysis is the test of equality of two population me[...]texto impreso
Menéndez Calleja, María Luisa ; Pardo Llorente, Leandro ; Tsairidis, Ch. ; Zografos, Konstantinos | Springer Heidelberg | 2003-09This paper is devoted to the statistical problem of ranking and selection populations by using the subset selection formulation. The interest is focused (i) on the selection of the best population among k independent populations and (ii) on the [...]texto impreso
Consider the system (S) {ut–?u=v(p),inQ={(t,x),t> 0, x??}, vt–?v=u(q), inQ, u(0,x)=u0(x)v(0,x)=v0(x)in?, u(t,x)=v(t,x)=0, whent?0, x???, where ? is a bounded open domain in ?N with smooth boundary, p and q are positive parameters, and functions[...]texto impreso
Based in a,generalised recursive tree-building algorithm for populations partitioned into strata a method to obtain simple descriptions of strata is presented. Also strata with a common rule are obtained. Common predictors and criterion variable[...]
