Articles de revista
http://hdl.handle.net/2117/3918
20160730T14:56:31Z

On the time decay of solutions for nonsimple elasticity with voids
http://hdl.handle.net/2117/89329
On the time decay of solutions for nonsimple elasticity with voids
Liu, Zhuangyi; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón
In this work we consider the nonsimple theory of elastic material with voids and we investigate how the coupling of these two aspects of the material affects the behavior of the solutions. We analyze only two kind of different behavior, slow or exponential decay. We introduce four different dissipation mechanisms in the system and we study, in each case, the effect of this mechanism in the behavior of the solutions.
20160728T11:25:42Z
Liu, Zhuangyi
Magaña Nieto, Antonio
Quintanilla de Latorre, Ramón
In this work we consider the nonsimple theory of elastic material with voids and we investigate how the coupling of these two aspects of the material affects the behavior of the solutions. We analyze only two kind of different behavior, slow or exponential decay. We introduce four different dissipation mechanisms in the system and we study, in each case, the effect of this mechanism in the behavior of the solutions.

Decisiveness indices are semiindices
http://hdl.handle.net/2117/89036
Decisiveness indices are semiindices
Freixas Bosch, Josep; Pons Vallès, Montserrat
In this note we prove that any decisiveness index, defined for any voter as the probability of him/her being decisive, is a semiindex when the probability distribution over coalitions is anonymous, and it is a semiindex with binomial coefficients when the probability over coalitions is anonymous and independent.
20160721T11:26:45Z
Freixas Bosch, Josep
Pons Vallès, Montserrat
In this note we prove that any decisiveness index, defined for any voter as the probability of him/her being decisive, is a semiindex when the probability distribution over coalitions is anonymous, and it is a semiindex with binomial coefficients when the probability over coalitions is anonymous and independent.

Some properties for probabilistic and multinomial (probabilistic) values on cooperative games
http://hdl.handle.net/2117/89025
Some properties for probabilistic and multinomial (probabilistic) values on cooperative games
Domènech Blázquez, Margarita; Giménez Pradales, José Miguel; Puente del Campo, María Albina
We investigate the conditions for the coefficients of probabilistic and multinomial values of cooperative games necessary and/or sufficient in order to satisfy some properties, including marginal contributions, balanced contributions, desirability relation and null player exclusion property. Moreover, a similar analysis is conducted for transfer property of probabilistic power indices on the domain of simple games.
This is an Accepted Manuscript of an article published by Taylor & Francis in Optimization on 18022016, available online: http://www.tandfonline.com/10.1080/02331934.2016.1147035.
20160721T10:15:08Z
Domènech Blázquez, Margarita
Giménez Pradales, José Miguel
Puente del Campo, María Albina
We investigate the conditions for the coefficients of probabilistic and multinomial values of cooperative games necessary and/or sufficient in order to satisfy some properties, including marginal contributions, balanced contributions, desirability relation and null player exclusion property. Moreover, a similar analysis is conducted for transfer property of probabilistic power indices on the domain of simple games.

International Journal on Advances in Education Research
http://hdl.handle.net/2117/88605
International Journal on Advances in Education Research
Buenestado Caballero, Pablo
20160707T11:54:47Z
Buenestado Caballero, Pablo

Vibration control of hysteretic baseisolated structures: an LMI approach
http://hdl.handle.net/2117/88603
Vibration control of hysteretic baseisolated structures: an LMI approach
Pozo Montero, Francesc; Pujol Vázquez, Gisela; Acho Zuppa, Leonardo
Seismic isolation systems are essentially designed to preserve structural safety, prevent occupants injury and properties damage. An active saturated LMIbased control design is proposed to attenuate seismic disturbances in baseisolated structures under saturation actuators. Using a mathematical model of an eightstoried building structure, an active control algorithm is designed. Performance evaluation of the controller is carried out in a simplified model version of a benchmark building system, which is recognized as a stateoftheart model for numerical experiments of structures under seismic perturbations. Experimental results show that the proposed algorithm is robust with respect to model and seismic perturbations. Finally, the performance indices show that the proposed controller behaves satisfactorily and with a reasonable control effort.
20160707T10:48:33Z
Pozo Montero, Francesc
Pujol Vázquez, Gisela
Acho Zuppa, Leonardo
Seismic isolation systems are essentially designed to preserve structural safety, prevent occupants injury and properties damage. An active saturated LMIbased control design is proposed to attenuate seismic disturbances in baseisolated structures under saturation actuators. Using a mathematical model of an eightstoried building structure, an active control algorithm is designed. Performance evaluation of the controller is carried out in a simplified model version of a benchmark building system, which is recognized as a stateoftheart model for numerical experiments of structures under seismic perturbations. Experimental results show that the proposed algorithm is robust with respect to model and seismic perturbations. Finally, the performance indices show that the proposed controller behaves satisfactorily and with a reasonable control effort.

Domino tilings of the Aztec Diamond
http://hdl.handle.net/2117/87721
Domino tilings of the Aztec Diamond
Rué Perna, Juan José
Imagine you have a cutout from a piece of squared
paper and a pile of dominoes, each of which can cover
exactly two squares of the squared paper. How many
different ways are there to cover the entire paper
cutout with dominoes? One specific paper cutout can
be mathematically described as the socalled Aztec
Diamond, and a way to cover it with dominoes is
a domino tiling. In this snapshot we revisit some
of the seminal combinatorial ideas used to enumerate
the number of domino tilings of the Aztec Diamond.
The existing connection with the study of the
socalled alternatingsign matrices is also explored.
20160606T12:01:56Z
Rué Perna, Juan José
Imagine you have a cutout from a piece of squared
paper and a pile of dominoes, each of which can cover
exactly two squares of the squared paper. How many
different ways are there to cover the entire paper
cutout with dominoes? One specific paper cutout can
be mathematically described as the socalled Aztec
Diamond, and a way to cover it with dominoes is
a domino tiling. In this snapshot we revisit some
of the seminal combinatorial ideas used to enumerate
the number of domino tilings of the Aztec Diamond.
The existing connection with the study of the
socalled alternatingsign matrices is also explored.

Overdetermined partial boundary value problems on finite networks
http://hdl.handle.net/2117/87715
Overdetermined partial boundary value problems on finite networks
Arauz Lombardía, Cristina; Carmona Mejías, Ángeles; Encinas Bachiller, Andrés Marcos
In this study, we define a class of nonselfadjoint boundary value problems on finite networks associated with Schrodinger operators. The novel feature of this study is that no data are prescribed on part of the boundary, whereas both the values of the function and of its normal derivative are given on another part of the boundary. We show that overdetermined partial boundary value problems are crucial for solving inverse boundary value problems on finite networks since they provide the theoretical foundations for the recovery algorithm. We analyze the uniqueness and the existence of solution for overdetermined partial boundary value problems based on the nonsingularity of partial DirichlettoNeumann maps. These maps allow us to determine the value of the solution in the part of the boundary where no data was prescribed. We also execute full conductance recovery for spider networks. (C) 2014 Elsevier Inc. All rights reserved.
© <2015>. This manuscript version is made available under the CCBYNCND 4.0 license http://creativecommons.org/licenses/byncnd/4.0/
20160606T08:48:55Z
Arauz Lombardía, Cristina
Carmona Mejías, Ángeles
Encinas Bachiller, Andrés Marcos
In this study, we define a class of nonselfadjoint boundary value problems on finite networks associated with Schrodinger operators. The novel feature of this study is that no data are prescribed on part of the boundary, whereas both the values of the function and of its normal derivative are given on another part of the boundary. We show that overdetermined partial boundary value problems are crucial for solving inverse boundary value problems on finite networks since they provide the theoretical foundations for the recovery algorithm. We analyze the uniqueness and the existence of solution for overdetermined partial boundary value problems based on the nonsingularity of partial DirichlettoNeumann maps. These maps allow us to determine the value of the solution in the part of the boundary where no data was prescribed. We also execute full conductance recovery for spider networks. (C) 2014 Elsevier Inc. All rights reserved.

Passive and hybrid mitigation of potential nearfault inner pounding of a selfbraking seismic isolator
http://hdl.handle.net/2117/87639
Passive and hybrid mitigation of potential nearfault inner pounding of a selfbraking seismic isolator
Abdel Kareem Moustafa, Mohamed Ismail; Rodellar Benedé, José; Pozo Montero, Francesc
A seismic isolated structure is usually a longperiod structural system, which may encounter a lowfrequency resonance problem when subjected to a nearfault earthquake that usually has a longperiod pulselike waveform. This longperiod wave component may result in an enlargement of the base displacement and a decrease of the isolation efficiency. To overcome this problem, a rollingbased seismic isolator, referred to as rollncage (RNC) isolator, has been recently proposed. The RNC isolator has a builtin buffer (braking) mechanism that limits the peak isolator displacements under severe earthquakes and prevents adjacent structural pounding. This paper addresses the problem of passive and hybrid mitigation of the potential inner pounding of the selfbraking RNC isolator under nearfault earthquakes. Numerical results show that the RNC isolator can intrinsically limit the isolator displacements under nearfault earthquakes with less severe inner pounding using additional hysteretic damping and active control forces
20160602T13:04:22Z
Abdel Kareem Moustafa, Mohamed Ismail
Rodellar Benedé, José
Pozo Montero, Francesc
A seismic isolated structure is usually a longperiod structural system, which may encounter a lowfrequency resonance problem when subjected to a nearfault earthquake that usually has a longperiod pulselike waveform. This longperiod wave component may result in an enlargement of the base displacement and a decrease of the isolation efficiency. To overcome this problem, a rollingbased seismic isolator, referred to as rollncage (RNC) isolator, has been recently proposed. The RNC isolator has a builtin buffer (braking) mechanism that limits the peak isolator displacements under severe earthquakes and prevents adjacent structural pounding. This paper addresses the problem of passive and hybrid mitigation of the potential inner pounding of the selfbraking RNC isolator under nearfault earthquakes. Numerical results show that the RNC isolator can intrinsically limit the isolator displacements under nearfault earthquakes with less severe inner pounding using additional hysteretic damping and active control forces

Seismic behavior of RNCisolated bridges: a comparative study under nearfault, longperiod, and pulselike ground motions
http://hdl.handle.net/2117/87564
Seismic behavior of RNCisolated bridges: a comparative study under nearfault, longperiod, and pulselike ground motions
Ismail, Mohammed; Rodellar Benedé, José; Casas Rius, Joan Ramon
This paper introduces a recent seismic isolation system, named RollinCage (RNC) isolator, for efficient protection of bridges against destructive earthquakes. The RNC isolator is a rollingbased isolation system with several integrated features in a single unit providing all the necessary functions of vertical rigid support, horizontal flexibility, full stability, hysteretic energy dissipation, and resistance to minor vibration loads. Besides, it is distinguished by a selfstopping (buffer) mechanism to limit the peak bearing displacement under abrupt severe excitations, a linear gravitybased selfrecentering mechanism to prevent permanent dislocations after excitations, and a notable resistance to axial tension. A threespan boxgirder prestressed concrete bridge is investigated under a set of different destructive real and synthetic earthquakes including nearfault, longperiod, and pulselike ground motions. As a performance measure, the responses of isolated and nonisolated cases are compared. In addition, the RNC isolator's behavior is then compared with those of other isolation systems including HDB, FPS, and LRB. The results confirmed that the RNC isolator has a superior behavior in achieving a balance between the peak displacements and accelerations of the isolated deck, relative other isolation systems, besides being the most (relatively) efficient isolator in the great majority of studies performed.
20160531T15:09:39Z
Ismail, Mohammed
Rodellar Benedé, José
Casas Rius, Joan Ramon
This paper introduces a recent seismic isolation system, named RollinCage (RNC) isolator, for efficient protection of bridges against destructive earthquakes. The RNC isolator is a rollingbased isolation system with several integrated features in a single unit providing all the necessary functions of vertical rigid support, horizontal flexibility, full stability, hysteretic energy dissipation, and resistance to minor vibration loads. Besides, it is distinguished by a selfstopping (buffer) mechanism to limit the peak bearing displacement under abrupt severe excitations, a linear gravitybased selfrecentering mechanism to prevent permanent dislocations after excitations, and a notable resistance to axial tension. A threespan boxgirder prestressed concrete bridge is investigated under a set of different destructive real and synthetic earthquakes including nearfault, longperiod, and pulselike ground motions. As a performance measure, the responses of isolated and nonisolated cases are compared. In addition, the RNC isolator's behavior is then compared with those of other isolation systems including HDB, FPS, and LRB. The results confirmed that the RNC isolator has a superior behavior in achieving a balance between the peak displacements and accelerations of the isolated deck, relative other isolation systems, besides being the most (relatively) efficient isolator in the great majority of studies performed.

Obtaining consensus of singular multiagent linear dynamic systems
http://hdl.handle.net/2117/87530
Obtaining consensus of singular multiagent linear dynamic systems
García Planas, María Isabel
There is much literature about the study of the consensus problem in the case where the dynamics of the agents are linear systems, but the problem is still open for the case where the dynamic of the agents are singular linear systems. In this paper the consensus problem for singular multiagent systems is considered, in which all agents have an identical linear dynamic mode that can be of any order. A generalization to the case all agents are of the same order but do not have the same linear dynamic is also analyzed.
20160531T10:14:10Z
García Planas, María Isabel
There is much literature about the study of the consensus problem in the case where the dynamics of the agents are linear systems, but the problem is still open for the case where the dynamic of the agents are singular linear systems. In this paper the consensus problem for singular multiagent systems is considered, in which all agents have an identical linear dynamic mode that can be of any order. A generalization to the case all agents are of the same order but do not have the same linear dynamic is also analyzed.