Departament de Ciència i Enginyeria Nàutiques
http://hdl.handle.net/2117/514
2016-12-05T04:47:44ZGuided to leaky mode transition in uniaxial optical slab waveguides
http://hdl.handle.net/2117/97541
Guided to leaky mode transition in uniaxial optical slab waveguides
Torner Sabata, Lluís; Recolons Martos, Jaume; Pérez Torres, Juan
The guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO/sub 3/, or LiTaO/sub 3/, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary cutoff and the extraordinary cutoff, which occur when considering negative and positive birefringent materials, respectively. Analytical but transcendental expressions have been obtained, yielding the critical optical axis orientation, relative to the waveguide axis, above which the totally guided hybrid modes become leaky. The results indicate that the value of the critical orientation strongly depends on the waveguide parameters. The possibility of tuning this critical orientation to a desired value through the waveguide parameters is discussed.
2016-11-30T15:37:45ZTorner Sabata, LluísRecolons Martos, JaumePérez Torres, JuanThe guided-to-leaky hybrid mode transition in slab optical waveguides made on uniaxial crystals such as LiNbO/sub 3/, or LiTaO/sub 3/, is analyzed. Two different guided-to-leaky transitions have been identified, namely the ordinary cutoff and the extraordinary cutoff, which occur when considering negative and positive birefringent materials, respectively. Analytical but transcendental expressions have been obtained, yielding the critical optical axis orientation, relative to the waveguide axis, above which the totally guided hybrid modes become leaky. The results indicate that the value of the critical orientation strongly depends on the waveguide parameters. The possibility of tuning this critical orientation to a desired value through the waveguide parameters is discussed.Delirious Gaudí : A psychoanalytic reading
http://hdl.handle.net/2117/97535
Delirious Gaudí : A psychoanalytic reading
Puente Martorell, José Manuel de la
Delirious Gaudí considers the work of the famous architect of Barcelona as "a mountain of evidences without manifesto" (as claimed by Rem Koolhaas of Manhattan in his famous essay, paraphrased in the title) not in the manner of a non-existent statement of Gaudí, but rather as the diagnosis of delusional or hallucinatory signs of a highly qualified person, initially interpreted as symptoms, and in the sense of a psychoanalytic characterization of the role of the architect.
2016-11-30T15:13:22ZPuente Martorell, José Manuel de laDelirious Gaudí considers the work of the famous architect of Barcelona as "a mountain of evidences without manifesto" (as claimed by Rem Koolhaas of Manhattan in his famous essay, paraphrased in the title) not in the manner of a non-existent statement of Gaudí, but rather as the diagnosis of delusional or hallucinatory signs of a highly qualified person, initially interpreted as symptoms, and in the sense of a psychoanalytic characterization of the role of the architect.A computational model for the evaluation of the spray generation of a wave adaptive modular vessel
http://hdl.handle.net/2117/97195
A computational model for the evaluation of the spray generation of a wave adaptive modular vessel
García Espinosa, Julio; Oñate Ibáñez de Navarra, Eugenio; Serván Camas, Borja; Nadukandi, Prashanth; Becker, Pablo Agustín
This paper presents part of the work done within the project ‘Advanced Numerical Simulation and Performance Evaluation of WAM-V ® in Spray Generating Conditions’ developed by the International Center for Numerical Methods in Engineering (CIMNE) under Navy Grant N62909-12-1-7101 issued by the Office of Naval Research
Global. One of the primary goals of that project was the development of a computational model for simulation of the Wave Adaptive Modular Vessel (WAM-V®) under spray generating conditions. For this purpose, a Semi-Lagrangian article Finite Element Method (SL-PFEM) has been applied. This is the latest development within the framework of the so-called Particle Finite Element Method (PFEM), using the X-IVAS (eXplicit Integration along the Velocity and Acceleration Streamlines) scheme. In this paper we demonstrate the applicability of the SL-PFEM using the X-IVAS scheme for the simulation of the Wave Adaptive Modular Vehicle under spray generating conditions.
2016-11-24T15:56:12ZGarcía Espinosa, JulioOñate Ibáñez de Navarra, EugenioServán Camas, BorjaNadukandi, PrashanthBecker, Pablo AgustínThis paper presents part of the work done within the project ‘Advanced Numerical Simulation and Performance Evaluation of WAM-V ® in Spray Generating Conditions’ developed by the International Center for Numerical Methods in Engineering (CIMNE) under Navy Grant N62909-12-1-7101 issued by the Office of Naval Research
Global. One of the primary goals of that project was the development of a computational model for simulation of the Wave Adaptive Modular Vessel (WAM-V®) under spray generating conditions. For this purpose, a Semi-Lagrangian article Finite Element Method (SL-PFEM) has been applied. This is the latest development within the framework of the so-called Particle Finite Element Method (PFEM), using the X-IVAS (eXplicit Integration along the Velocity and Acceleration Streamlines) scheme. In this paper we demonstrate the applicability of the SL-PFEM using the X-IVAS scheme for the simulation of the Wave Adaptive Modular Vehicle under spray generating conditions.Hoteling Cruise ship's power requirements for high voltage shore connection installations
http://hdl.handle.net/2117/97143
Hoteling Cruise ship's power requirements for high voltage shore connection installations
Espinosa Sanes, Sergi; Casals Torrens, Pau; Castells Sanabra, Marcel·la
2016-11-23T16:07:34ZEspinosa Sanes, SergiCasals Torrens, PauCastells Sanabra, Marcel·laImágenes digitales e imágenes analógicas en las disciplinas gráficas de la arquitectura
http://hdl.handle.net/2117/96658
Imágenes digitales e imágenes analógicas en las disciplinas gráficas de la arquitectura
Puente Martorell, José Manuel de la
Analogic versus digital: Mental and cultural image generation in the interpreation of architectural examples
2016-11-15T12:17:44ZPuente Martorell, José Manuel de laAnalogic versus digital: Mental and cultural image generation in the interpreation of architectural examplesLagrangian finite element model for the 3D simulation of glass forming processes
http://hdl.handle.net/2117/90788
Lagrangian finite element model for the 3D simulation of glass forming processes
Ryzhakov, Pavel; García Espinosa, Julio; Oñate Ibáñez de Navarra, Eugenio
We propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we introduce several new features adapting the strategy to suit the problem of interest. A modified fractional step method for the solution of the flow equations is applied. This approach, on the one hand, inherits the computational efficiency of the original fractional step approach, and on the other hand shows better mass conservation features. These features are particularly attractive taking into account the importance of the correct prediction of the glass product’s wall thickness. A smart mesh update strategy and a simple mechanical contact scheme are introduced. In order to account for temperature-dependent viscosity, the heat equation is coupled to the mechanical model. Viscosity is obtained from the temperature field via an empirical law. The model is validated and an example modeling the processes in the final blow mold of the bottle manufacturing process is proposed.
2016-10-14T13:42:47ZRyzhakov, PavelGarcía Espinosa, JulioOñate Ibáñez de Navarra, EugenioWe propose here a numerical model for a three-dimensional simulation of glass forming processes. Using the basic philosophy of the Particle Finite Element method (PFEM), we introduce several new features adapting the strategy to suit the problem of interest. A modified fractional step method for the solution of the flow equations is applied. This approach, on the one hand, inherits the computational efficiency of the original fractional step approach, and on the other hand shows better mass conservation features. These features are particularly attractive taking into account the importance of the correct prediction of the glass product’s wall thickness. A smart mesh update strategy and a simple mechanical contact scheme are introduced. In order to account for temperature-dependent viscosity, the heat equation is coupled to the mechanical model. Viscosity is obtained from the temperature field via an empirical law. The model is validated and an example modeling the processes in the final blow mold of the bottle manufacturing process is proposed.A laminated structural finite element for the behavior of large non-linear reinforced concrete structures
http://hdl.handle.net/2117/89389
A laminated structural finite element for the behavior of large non-linear reinforced concrete structures
Escudero Torres, Cuauhtemoc; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro
In order to correctly predict the kinematics of complex structures, analysis using three-dimensional finite elements (3DFEs) seems to be the best alternative. However, simulation of large multi-layered structures with many plies can be unaffordable with 3DFEs because of the excessive computational cost, especially for non-linear materials. In addition, the discretization of very thin layers can lead to highly distorted FEs carrying numerical issues, therefore, reduced models arise as an affordable solution.
This paper describes a new finite element formulation to perform numerical simulations of laminated reinforced concrete structures. The intention of this work is that the proposed scheme can be applied in the analysis of real-life structures where a high amount of computational resources are needed to fulfill the meshing requirements, hence the resulting formulation has to be a compromise between simplicity and efficiency.
So that, the condensation of a dimension (thickness), mandatory to model three-dimensional structures with two-dimensional finite elements (2DFEs), leads to refer all layers contained within such FEs to a plane, which is typically named middle plane or geometrical plane, since its sole function is to serve as a geometrical reference. This work is based on the assumption that the geometrical plane has to be distinguished from a mechanical plane, which is where the resultant stiffness of all layers is contained. It is also assumed in this work that the mechanical plane changes its position due to non-linear response of the component materials.
2016-08-29T10:23:57ZEscudero Torres, CuauhtemocOller Martínez, Sergio HoracioMartínez García, JavierBarbat Barbat, Horia AlejandroIn order to correctly predict the kinematics of complex structures, analysis using three-dimensional finite elements (3DFEs) seems to be the best alternative. However, simulation of large multi-layered structures with many plies can be unaffordable with 3DFEs because of the excessive computational cost, especially for non-linear materials. In addition, the discretization of very thin layers can lead to highly distorted FEs carrying numerical issues, therefore, reduced models arise as an affordable solution.
This paper describes a new finite element formulation to perform numerical simulations of laminated reinforced concrete structures. The intention of this work is that the proposed scheme can be applied in the analysis of real-life structures where a high amount of computational resources are needed to fulfill the meshing requirements, hence the resulting formulation has to be a compromise between simplicity and efficiency.
So that, the condensation of a dimension (thickness), mandatory to model three-dimensional structures with two-dimensional finite elements (2DFEs), leads to refer all layers contained within such FEs to a plane, which is typically named middle plane or geometrical plane, since its sole function is to serve as a geometrical reference. This work is based on the assumption that the geometrical plane has to be distinguished from a mechanical plane, which is where the resultant stiffness of all layers is contained. It is also assumed in this work that the mechanical plane changes its position due to non-linear response of the component materials.La obligación del expedidor de verificación de la masa bruta de los contenedores
http://hdl.handle.net/2117/88913
La obligación del expedidor de verificación de la masa bruta de los contenedores
Rodrigo de Larrucea, Jaime
Ponencia presentada Congreso de la Asociación Española de Derecho Marítimo. Bloque SEGURIDAD MARÍTIMA. La comunicación plantea tras los accidentes del MSC NAPOLI y el MOL CONFORT, la modificación del Convenio SOLAS sobre la obligación del pesaje correcto de los contenedores como obligación del expedidor.
2016-07-20T08:39:21ZRodrigo de Larrucea, Jaime103 años de Seguridad Marítima
http://hdl.handle.net/2117/87241
103 años de Seguridad Marítima
Rodrigo de Larrucea, Jaime
Exposición panorámica de los principales avances legislativos, de construcción naval y de seguridad marítima desde el siniestro del TITANIC hasta nuestros días.
2016-05-23T12:13:41ZRodrigo de Larrucea, JaimeExposición panorámica de los principales avances legislativos, de construcción naval y de seguridad marítima desde el siniestro del TITANIC hasta nuestros días.Impact of logistics and shipping in the sustainable development of societies
http://hdl.handle.net/2117/86595
Impact of logistics and shipping in the sustainable development of societies
Martínez Marín, Jesús Ezequiel
Definitely, although not very obvious, shipping affects the daily lives of the majority of the
world population. The socio-economic implications of logistics undoubtedly affect the social
development of cities. With the implementation of sustainability in the supply chain, and not
only think of a commercial profit but in an overall benefit in mind the impact it is having on the
ecosystem. Solutions, research and discussion topics to open an academic contribution is
interesting, that would open up discussions.
2016-05-04T15:24:37ZMartínez Marín, Jesús EzequielDefinitely, although not very obvious, shipping affects the daily lives of the majority of the
world population. The socio-economic implications of logistics undoubtedly affect the social
development of cities. With the implementation of sustainability in the supply chain, and not
only think of a commercial profit but in an overall benefit in mind the impact it is having on the
ecosystem. Solutions, research and discussion topics to open an academic contribution is
interesting, that would open up discussions.