TECHNOLOGICAL SCIENCES

Author: Barea del Cerro Rafael.
Year: 2003.
University: AUTÓNOMA DE MADRID [More theses of this university] [www.uam.es].
Place of defense: Facultad de Ciencias.
Place of preparation: Instituto de Cerámica y Vidrio CSIC.

Summary: In many applications it is necessary to know the thermal conductivity of the materials used in them. The measurement of thermal conductivity is difficult, given its wide range of variability (up to 10 orders of magnitude) and the difficulty in obtaining suitable experimental conditions. During the argument have been measured materials biphasic of Alúmina-SiC and mullita porous (such as porosity as a second phase). We have made appropriate models to explain the behavior of each material. It has also used the finite element method (FEM) to simulate the microstructure of materials. We have compared different models of thermal conductivity with the data obtained by finite elements, and the model developed during the thesis. Same time, it has developed a computer to measure the thermal conductivity through the comparative method. The method is to compare the thermal conductivity of the material problem with the thermal conductivity of two patterns. This technique has been compared in extent, with the laser pulse method and the results obtained were compared with the models.

Author: PEREZ DE LA PARTE MARIA DE LAS MERCEDES.
Year: 2003.
University: SEVILLA [More theses of this university] [www.us.es].
Place of defense: ESCUELA SUPERIOR DE INGENIEROS.
Place of preparation: ESCUELA SUPERIOR DE INGENIEROS.

Summary: Based on the theoretical foundations of Control Mode Sliding and Control Based on Predictive Model are presented in this thesis some joint control laws based on the model of First Order More Time Dead process control, which appropriately characterized most of the industrial processes and is easily obtained. Additionally were obtained several simple rules tuning, depending on the model parameters that provide closed-loop responses stable and smooth, even with a high degree of uncertainty formal and informal modeling. In several paragraphs analysis has been made of stability, adminisiblidad and robustness. It has devoted a chapter to the simulation of the proposed laws with different systems orders reatrado and a system of non-minimum phase. We have planned and implemented laws to the two non-linear systems with uncertainty and disturbance: an exchange of heat in a circuit recirculation water in the pilot plant of the department. Systems Engineering and Automation at the University of Seville and a field of solar radiation collectors distributed platform located at the Solar Energy Research Center, Environment and Technology in Tabernas (Almeria). The results have been satisfactory.

Author: RIOS PEREZ RICARDO.
Year: 2003.
University: SEVILLA [More theses of this university] [www.us.es].
Place of defense: FACULTAD DE COMUNICACIÓN.
Place of preparation: FACULTAD DE COMUNICACIÓN.

Summary: The thesis begins planteándose from where the Catholic Church has been involved in the communication. Analyzes the attention that the Popes of the twentieth century, since Leo XIII to John Paul II has given to the media and focuses on the pontificate of John Paul II studying their messages written and oral statements in which refers to the media and media professionals. It also explores various documents of the Catholic Church as the code of canon law, catechism â |, and emanating from the pontifical council for social communications.

Author: BRAVO CARO JOSÉ MANUEL.
Year: 2003.
University: SEVILLA [More theses of this university] [www.us.es].
Place of defense: ESCUELA SUPERIOR DE INGENIEROS.
Place of preparation: ESCUELA SUPERIOR DE INGENIEROS DE LA UNIVERSIDAD DE SEVILLA.

Summary: This thesis aims to develop new control algorithms predictive models based on non-linear, focusing on aspects of stability and robustness. It had proposed a series of methodologies used to design integrated predictive controller that explicitly takes into account the uncertainty. The design of these new techniques has been used as the basis intervalar arithmetic. This arithmetic is an extension of the real arithmetic where the real numbers are replaced by closed intervals of real numbers. This powerful tool has helped develop new strategies to explicitly incorporate uncertainty in the processes of identifying the model of perdition, estimating current state and development of predictive controller. The first chapter presents the predictive control, lists the various objectives of this thesis provides a short introduction to the arithmetic intervalar. Chapter Two is proposing a new method of identifying parametric modeling. Since it is assumed that the model parameters can vary over time, the aim is to provide a set of parameters consistent with the data input error and the peak seen. This new method of identification is part of the paradigm of identification guarantees, which works with the assumption that the measures prior contain an error and bounded height variation of the parameters is also bounded. Chapter three presents a new algorithm that allows calculating invariants positive or joint control. The determination of these groups is important for the analysis of systems subject to restrictions and for the design of controllers predictive stabilizers. It proposes joint defined through lists of boxes, which allow represent complex, either through a set of linear constraints. The latter representation poliédrica facilitates its handling in exchange for restricting the kind of joint invariant obtained. The fourth chapter deals with the formulation of robust predictive controllers for nonlinear systems. These drivers are robust to explicitly take into account the uncertainty in their formulation. Drivers admit proposed models with parametric uncertainties as both ADDITIVE and use techniques intervalares to get garantistas predictions of the trajectory. It proposes two techniques for obtaining garantistas trajectories: the extension intervalar natural and prediction based on zonotopes. They are considering three types of drivers that differ in how to ensure stability: the first uses a horizon prediction contractivo, the second a restriction contractionary, and the third used two different horizons prediction, a robust and another face that is used to obtain trajectories of the best closed-loop system. When a driver predictive models using non-linear optimization problem to be solved every moment of sampling is perhaps not convex, and therefore need an algorithm optimization involving a large computational burden. This problem is addressed in chapter five, which makes a production controller for robust nonlinear systems based on linearization of a nominal trajectory. The objective is to obtain a convex optimization problem, which requires little computational load. One of the sources of conservatism experiencing robust predictive controllers is due to the prediction loop open. The implementation of predictive control horizon slider lets you enjoy the benefits provided by the closed-loop control. However, the open-loop prediction does not take account of these benefits. Chapter six is studying ways to introduce closed-loop prediction that improve predictions used in robust controllers l 8 os c chap b7e ítulos earlier. It proposes two new formulations of robust predictive controllers. The first design includes frontloading in the control signal, which allows to improve the performance of the controller. The second operation is divided into two phases. The first phase is responsible for calculating a sequence of candidate control signals using a simplified model of the real system so that it obtains a simple optimization problem. This sequence control laws also includes a frontloading the control signal. This check is performed using the sequence of candidate control signals to form the closed-loop prediction guarantees. If yes implementing control signal. If not formulated a new optimization problem that generates a sequence more robust but miss optimality. All drivers above regarded as a precise knowledge of the state system to control each instant in time. This assumption is not always possible. In chapter seven proposes a new state estimator forever with non-linear parametric uncertainties and bounded ADDITIVE. This estimator, as well as the identification algorithm proposed in chapter two, is a guarantor, it provides a benchmark of all states consistent with the average and peak input error in question. It includes an appendix that meeting in an orderly fashion a set of techniques used or developed along the thesis. The first section performs a thorough review of arithmetic intervalar, operations, properties and applications. The second details the method called the zonotope. This thesis proposes new operations that allow geometric calculating intersections between stripes and zonotopes and between zonotopes themselves. These original contributions are included in the appendix in order to improve the readability of the text. Lastly includes a section on findings and future lines of inquiry, which lists the various technical presentations and suggests future research directions opened up by this thesis.

Author: SAMPER ZAPATER JOSÉ JAVIER.
Year: 2004.
University: VALENCIA [More theses of this university] [www.uv.es].
Place of defense: E.T.S. d' Enginyeria.
Place of preparation: DEPARTAMENTO DE INFORMÁTICA.

Summary: This thesis integrates two scientific areas: on the one hand the Traffic Engineering and Computer Sciences otherwise. Within the Traffic Engineering, part of the so-called Intelligent Traffic Systems (ITS) which are based on the application of technologies Telecommunications and Informatics (Telematics) to support schemes to road traffic, belonging to the domain "Services Traveler Information "(TIS). As evidenced by this thesis, there are some problems arising from the use of such systems from the user's perspective, giving rise to it is unable to obtain clear and precise information relevant to their requirements. The main problems identified were the lack of a common vocabulary of terms which makes use of a well-defined semantics to enable the meaning (even those not explicit) of each concept of road traffic, as well as retrieving information from different sources heterogeneous , in a simple and intuitive way. Several aspects described the current problems concerning access and information sharing: A large volume of traffic information is distributed among multiple sites. The main problem for a user who needs information of this kind is to find these websites and also deal with different access thereto, as well as different forms of presentation. - In addition, a user may need information of a different nature or type, and therefore the storage of all of this information on a single site is not feasible at the level of storage costs, or even at the maintenance level. - The processing of information does not allow inferences about it so that it can be obtained as a result, a priori information that was not explicitly detail. Following the discovery of the existing problems and identification of elements that could rectify this situation, this paper focuses on the study of systems STI aimed at facilitating traffic information to the user, and that in turn will allow the management of information , processing and exchange, effectively between the various components of the architecture of traffic information services such as users, applications, and providers of information. To achieve the goals set have been developed various elements as part of an architecture, which accounted for certain inputs and / or outputs:-Construction of infrastructure ontological whose domain is framed on the information on road traffic. The ontologies built form the core of the work, because on the one hand, are the domain ontology used as a medium in matching services, and in turn, make up a mechanism description of the different information services traffic, which they are specified through references to concepts described in these ontologies. The infrastructure created ontological can be regarded as a solid foundation in developing a future full vocabulary and semantics used by the administrations of traffic. - It has been a framework for the conversion of conventional Web portals for information on Web Services Semánticos (SWS) so that feedback can be stored with the addition of significance getting in turn, develop new capabilities that initially non-existent. - Extension methodologies for building ontologies, previously existing, to bring the process to be followed in obtaining a formal semantic model from a model Entity (RE). In this approximation, have joined various aspects of current methodologies as well as those arising from 8 lesson 8e6 is learned from the experience. This method was applied in the construction of infrastructure ontological created, and can serve as a guide for development in ontological similar constructions. - Has been designed, implemented and evaluated, a matching algorithm SWS, which takes full advantage of the capabilities provided by ontologies for describing services and an improvement of the existing ones. In this algorithm matching widened the range of degrees of similarity, primarily with the consideration of new relationships in the taxonomy of the domain ontology used as a support in the match. Inclusion of degree or fraternal brothers and a number of other modifications. We have shown a series of proposals for creating and managing Web services semantic information of road traffic: new parameter is not functional, ontology categorization traffic services and election of factors in measuring the QoS. Finally, the proposals have been validated on the basis of the development of a prototype based software architecture for integrating SWS information on road traffic, which has enabled the assembly of all elements (ontologies traffic, matching algorithm, information services traffic), resulting in each of the stages of this investigation. Using the prototype built, has been evaluated and verified the functionality of the whole by studying the relationships between each of the components and results.

Author: GONZALEZ DIAZ ROBERTO.
Year: 2004.
University: LA LAGUNA [More theses of this university] [www.ull.es].
Place of defense: CENTRO SUPERIOR DE NAUTICA Y ESTUDIOS DEL MAR.
Place of preparation: CENTRO SUPERIOR DE NAUTICA Y ESTUDIOS DEL MAR.

Summary: This work is based on the experience in rescue operations conducted from ships INSTITUTE OF SOCIAL NAVY, HOPE OF THE SEA, EHOA and EBUQ. The basic tool for the provision of assistance are the rescue boats and auxiliaries. We believe that the use of rescue boats in rescue operations at sea from a ship intact, is conditioned by adversity environment, the physical and human resources available as well as procedures. We identify and appreciate the constraints of the environment, making afloat / retrieval and navigation / assistance. Of the identified hazards are deducted risks, identifying the man in the water as the most important. We evaluate the risks in light of the constraints by designing a simplified approach to risk management with a rational structure consistent with the provisions in the Law on Prevention of Accidents at Work. It proposes criteria to optimize insurance limits in the use of rescue boats. The interest of the method is to add objectivity to the generally employed in the sector, allowing traceability of events in cases of accidents and facilitate, through a methodical structure, the audit of the means of rescue aboard ships.

Author: GONZALEZ HERNANDEZ OSWALDO BERNABE.
Year: 2004.
University: LA LAGUNA [More theses of this university] [www.ull.es].
Place of defense: FACULTAD DE FISICA.
Place of preparation: FACULTAD DE FISICA.

Summary: In recent years, guided data networks have undergone a profound transformation, reaching transfer rates of hundreds of Megabits per second. However, the philosophy of personal communications has changed, and today, the end user demand for wireless connections that can provide greater flexibility and autonomy, but in turn do not present any restriction on the maximum transmission speed, so that they can develop on the same applications can be as demanding as streaming video quality. In this sense, there are two technologies competing for the above can get a reality. On the one hand, we find the radio frequency technology, which has received great support from businesses and research centers, which has resulted in the significant development that currently local networks not guided IEEE 802.11. On the other hand, we find technology that makes use of infrared link, which is the greatest exponent IrDA standard for personal communications point-to-point half-speed. This is not, today, a real alternative within local networks not guided, but infrared technology has a number of characteristics that make it a very attractive candidate for multiple application environments for high-speed networks. In this context, this paper elaborates on the characterization of infrared channel with the idea of identifying their practical limits apply. To that end, it has developed a ray tracing algorithm based on the Monte Carlo method, which allows the analysis of communication environments more realistic as can be furnished rooms or with irregular geometric shapes. Similarly, a study has been made of the mistake made during this characterization, which yields a measure of the degree of confidence in the results obtained with the algorithm. Thereafter, he examines the introduction of OFDM techniques in the optical communications systems not guided high speed. The main aim is to minimize the effects of interferences due to other users and lighting, while transfer rates are achieved high. To this end, they intend equally different rate adaptive OFDM schemes that seek to maximize the capacity of the channel, with a significant improvement of system performance when working in high-noise environments. Finally, it outlines the results of the optical system OFDM environments with multiple users. The scheme SDMA-OFDM proposed uses multiuser detection methods, in conjunction with techniques in diversity reception angle. There is a very good system performance in the presence of multiple users to transmit over the hundred Megabits per second, using relatively simple structures at the reception. The use of more complex configurations for devices transmitters and receivers, which use holographic techniques in transmission and reception, you can allow the system to achieve transfer speeds well above those presented in this work, in the presence of a greater number user.

Author: MORENO DE ANTONIO LUZ MARINA.
Year: 2004.
University: LA LAGUNA [More theses of this university] [www.ull.es].
Place of defense: E.T.S.DE INGENIERIA EN INFORMATICA.
Place of preparation: E.T.S. DE INGENIERIA EN INFORMATICA.

Summary: THESIS THIS IS ENMARCA IN THE CONTEXT OF THE RESOLUTION IN PARALLEL; IN PARTICULAR IN SYSTEMS WHERE THE MACHINES BY DIFFERENT FEATURES. YOU MUST REVISE THE KNOWN FOR TECHNICAL ENVIRONMENTS HOMOGENEOS FOR ADAPTARLAS TO NEW ENVIRONMENTS HETEROGENEOS. OBJECTIVES OF THIS THESIS SE CENTRAN IN THE DEVELOPMENT OF MODELS TO LET DETERMINE THE VALUES OF THE PARAMETERS TO MINIMIZAN THE TIME OF RESOLUTION OF A PROBLEM IN A HETEROGENEOUS SYSTEMS AND DEVELOPING TOOLS TO FACILITATE THE PROGRAMMING AND IMPLEMENTATION OF THIS TYPE OF ENVIRONMENTS.

Author: MARISCAL CONTRERAS CRISTINA.
Year: 2004.
University: CASTILLA-LA MANCHA [More theses of this university] [www.uclm.es].
Place of defense: FACULTAD DE CIENCIAS QUMICAS..
Place of preparation: FACULTAD DE QUIMICAS.

Summary: DOCTORAL THESIS ON THIS HAS BEEN CARRIED OUT THE CHARACTERIZATION OF SAUSAGE DEVELOPED WITH MEAT CIERVO ABATIDOS TO START AND END OF THE SEASON OF HUNTING AND MADURADOS IN TERMS OF SECADERO NATURAL AND SECADERO CONTROLLED. SE ANALIZO COMPOSITION FISICO-QUIMICA, MICROBIOLOGICA And SENSORIAL AND STUDY THE DEVELOPMENT OF PROTEOLISIS AND THE EVOLUTION OF FATTY ACID FREE DURING THE PROCESS OF DEVELOPING.

Author: SOTO YEN JORGE ENRIQUE.
Year: 2004.
University: OVIEDO [More theses of this university] [www.uniovi.es].
Place of defense: DEP. PROSPECCION Y EXPLOTACION MINAS.
Place of preparation: ETSIMO.

Author: MAGRO PEÑA MARIA BELEN.
Year: 2004.
University: POLITÉCNICA DE MADRID [More theses of this university] [www.upm.es].
Place of defense: FACULTAD DE INFORMATICA.
Place of preparation: FACULTAD DE INFORMATICA.

Summary: The processes validation, compliance, acceptance are essential in the systems engineering and software. We only have to think about medical systems, automotive, communications, aviation and space, to name a few. It is understandable, therefore, the sense as building tools and environments to ease the effort required to carry out these processes. Although in recent years have made contributions in this direction are still far points to be addressed. This research work precisely undertakes some hotspots. As a key objective of high level we systematization of the development of validation tools, tools that depend on the domain name system that attempts to validate. This thesis deeper look at any basic system software as is the architecture. The evolution of research in software architecture has been moving towards the definition of so-called product lines. As a result techniques have been developed to build software applications, with certain advantages over more conventional, drawing the definition of a generic reference architecture for an entire product family. In conclusion, it is intended to make a contribution in the field of tools for the validation, testing the hypothesis of the existence of a generic architecture, obtaining a reference architecture, based on the work on existing product lines. Moreover the results serve to analyze the merits of the methodologies for defining product lines and suggest possible improvements. It should be noted that these tools for validation in many cases are also used for operation of the system, which extends the value of the work done.

Author: Torres de Maria Gonzalo.
Year: 2004.
University: LLEIDA [More theses of this university] [www.udl.es].
Place of defense: Universidad de Lleida.
Place of preparation: Universidad de Lleida.

Summary: The refrigeration and freezing by immersion (RCPI) is to submerge food in a low temperature aqueous fluid, consisting of mixtures of water and solutes specific. During the process there are simultaneous transfers of matter and energy and thus, typically, the product earns solutes environmental immersion, and loses water. This gain solutes, in the past, defined applications processes immersion to a range can be reduced, depending on their composition, monophasic, composed of a single liquid phase, and diafásicos if consist of a solid phase and other liquid. The liquid ice microcrystals are mixtures of ice (0-500 um) in aqueous solutions antifreeze. At present, and since the mid-90, a major focus of scientific interest suppose an alternative to the use of CFC-based refrigerants and HCFCs. Typically, they are used in air conditioning systems, cooling processes and systems for storing thermal energy. In agro applications, studies on the use of ice processes in liquid cooling and freezing of food, as well as its industrial development, are very low, except in the case of seafood, where the industrial application of ice to liquid processes refrigeration and storage presents comprehensive advantages. This paper has studied the process of RCPI on a cylindrical product, using ice and liquid brine. First, identified characteristics termofísicas ice formed by liquid mixtures of water and NaCl. Subsequently, the coefficients of heat transfer surface for ice applications RCPI using conventional liquid and pickles were quantified to spend in the latter part of the study to compare the transfer of matter and energy for pickles and ice immersion liquids together a discussion of the main factors that govern the process. The versatility of immersion processes, the ability to obtain products preformulados through the incorporation of additives to the media immersion, along with the benefits of using liquid ice processes RCPI, enable this option reveal a great potential Looking ahead.

Author: TORMOS FERRANDO ALVARO.
Year: 2004.
University: POLITÉCNICA DE VALENCIA [More theses of this university] [www.upv.es].
Place of defense: Dep. Ingenieria Electronica.
Place of preparation: Universidad Politécnica de Valencia.

Summary: The influence of temperature on the cardiac electrophysiology is a known fact, although the effects of variations on regional myocardial electrophysiological parameters and the characteristics of activation during ventricular fibrillation (FV) have not been sufficiently investigated. In experimental models, the analysis of the modulatory effect exerted by local changes in temperature can provide information on the mechanisms that underlie the FV or procedures for its effective control. In this Doctoral Thesis has developed a system for modifying the myocardial temperature in isolated heart model, capable of creating conditions of hypothermia and hyperthermia controlled confined to a limited area of the fabric. In its implementation has been used an electrode extraplano manufactured in technology thick-film allowing the implementation of incentives and the simultaneous registration of electrogramas ventricular at different temperatures. This system has been used in isolated hearts and perfundidos rabbit, to quantify the effects of hypothermia and hyperthermia premises on the characteristic parameters of the frequency of activating the FV and electrophysiological parameters obtained during stimulation baseline. To do so, it has changed the temperature epicárdica of the left ventricular free wall between 17 Â ° C and 42 Â ° C. The results show that hypothermia local prolonged periods refractory ventricular and slows driving during stimulation baseline, taking hyperthermia the opposite effect. Despite these variations, the wavelength of the activation process does not suffer significant changes. Moreover, during the FV local hyperthermia accelerates so reversible activation in the area in which it is applied, while the slowing hypothermia. In the temperature range studied, there is a linear relationship between the frequency of the dominant FV or interval activation rate and temperature. Finally, tests showed that, contrary to what happens with hypothermia overall, enlenticimiento experienced by the FV in the area where they made changes in temperature fails to cause global changes in the activation or termination of arrhythmia.

Author: MOYA RAMIREZ DAVID.
Year: 2004.
University: POLITÉCNICA DE VALENCIA [More theses of this university] [www.upv.es].
Place of defense: Dep. Maquinas y Motores Térmicos.
Place of preparation: Universidad Politécnica de Valencia.

Summary: The basic function of the system of renewal of the cargo is the evacuation to the atmosphere of gases resulting from combustion in the cylinders of the engine and replacement inside the cylinders of fresh mixture. This process produces a noise that is, in principle, the pressure disturbance that is generated in the process, to which must be added the impact of noise generation by turbulence (noise flow). To reduce the noise pulses are used silencers elements, especially in the exhaust. The choice of muffler to use depends on the objectives with regard to noise level and the characteristics of the exhaust noise (sound quality). In any case, it is necessary to know the inner workings of the muffler to use the right for every need, as well as improve existing ones. One of the most suitable tools for this purpose is modeling, which helps reduce costs and development times, introducing the added advantage of being able to consider the interaction between different elements and not just the behavior of an element aislado.En this thesis has been defined and pursued a modeling methodology that enables on the one hand, the validation of one-dimensional models under controlled conditions, and also its use within the overall prediction of exhaust noise in the time domain. The models are based on the decomposition of muffler on simple elements that reproduce the mechanisms of attenuation of the main element to consider. Further research has been influenced by the numerical method chosen, whose ultimate impact on the quality of performance in the frequency domain is not clearly establecido.El content of the thesis is structured in accordance with the following methodological stages: the first deals with the one-dimensional modeling of the characterization by the method of momentum, to spend time to define the types to consider for silencers and other devices to study. This raises the development and implementation of effective models for different elements considered simple, and its association to reproduce the behavior of complex elements, followed by the validation and eventual refinement of calculations for comparison with measurements made by the method of momentum. Finally, it verifies the validity of the model through the prediction noise and their comparison with reliable measures of noise.

Author: MARANT VINCENT FRANCOIS.
Year: 2004.
University: POLITÉCNICA DE VALENCIA [More theses of this university] [www.upv.es].
Place of defense: Dep. Maquinas y Motores Termicos.
Place of preparation: Universidad Politécnica de Valencia.

Summary: Studies of noise emissions from vehicles have gained considerable importance in recent years for two main reasons. The first is the increase in social awareness towards the phenomena of conta-minación environment, which translates into increasingly stringent legislation regarding the noise radiation allowed. The second relates to increased market demands to design vehicles with the highest levels of comfort as prestaciones.Dentro the complexity of the phenomena generating noise in the vehicle, this dissertation focuses on the main source of noise Engine and, in many cases, the entire vehicle: noise combustion. Moreover, if the pressure level radiated noise is an important element for compliance with the noise regulations, builders and customers are also paying increasing attention to the sound quality of the noise radiated by the engine Overall, both mechanical and combustion. To help give an answer to this demand, this paper proposes an original method, based on an analysis of the pressure in the cylinder, for estimating quality audio noise radiated by the diesel engine injection directa.Tras a summary of the state of the art related to the topic of combustion noise is defined experimental facility necessary for the conduct of the trials in which supports this thesis. It describes the characteristics of the camera anecóica used and the acquisition of equipment necessary to properly record audio signals and thermodynamic parameters of interest. Also detailing routine testing and adequate methodology for classifying sounds grabados.A then provides an efficient method of processing the signal pressure cylinder. After highlighted the inefficiency of the conventional techniques, shows the potential of an innovative methodology, which consists of the decomposition of the total pressure in three sub-señales: pseudo-arrastre, combustion and resonance. Because of the importance of surprising resonance of the combustion chamber, particular attention is paid to analysis of this phenomenon. They are using numerical methods, such as three-dimensional analysis, to study the case of a cylindrical chamber with simple excitement, as well as the influence of geometry bowl and the type of excitement. It then obtains an efficient method to take into account criteria in the design of acoustic chambers of combustión.Finalmente, the results establish two significant components of the combustion process relevant to the sound quality of combustion noise. They reflect the influence of gradients maximum cylinder pressure and energy associated with the resonance of the bowl, respectively. Furthermore, it explains a relationship between the note physically coherent subjective noise and these indicators of combustion, depending on the engine studied. These findings have direct application in the definition of a reliable diagnostic tool for the sound quality during the tuning of the engine, as already exists with respect to the optimization of consumption, power and emissions. Finally, it briefly discusses the sensitivity of the note changes injection parameters, and system load

Author: SANCHIS KILDERS PABLO.
Year: 2004.
University: POLITÉCNICA DE VALENCIA [More theses of this university] [www.upv.es].
Place of defense: Dep. Comunicaciones.
Place of preparation: Universidad Politécnica de Valencia.

Summary: The objective of this thesis is the investigation of structures and techniques acoplo to minimize losses acoplo between guides and dielectric crystals fotónicos Planar. First has studied the modeling acoplo between dielectric guides and guides glass fotónico well as the influence of the main parameters of the crystal in the efficiency of acoplo. There have been expressions closed for arrays of reflection and transmission that characterize fully the scattering that occurs in the interface formed between a guide and a guide dielectric glass fotónico. Then, in order to improve the efficiency of acoplo from guides dielectric wide arbitrary, has been proposed as an original contribution technique acoplo based on the introduction of spot defects in the interior of a structure acoplo type wedge in the glass fotónico. Different solutions, including genetic algorithms have been proposed with the objective of achieving the optimal design of the configuration of defects. Once achieved acoplo efficient dielectric guides guides glass fotónico, has been investigated acoplo in guides coupled cavities. As original contribution has been proposed technique acoplo based on the gradual variation of the radius of defects between adjacent cavities. In addition, it has conducted a rigorous analysis in the time domain and frequency of pulse propagation in guides coupled finite length. This study has been to characterize the influence of the efficiency of acoplo on parameters of the pulse. Finally, there have been manufacturing processes and results of experimental structures acoplo proposals.

Author: GALLESKE INGO.
Year: 2004.
University: POLITÉCNICA DE MADRID [More theses of this university] [www.upm.es].
Place of defense: FACULTAD DE INFORMÁTICA.
Place of preparation: FACULTAD DE INFORMÁTICA DE LA UNIVERSIDAD POLITECNICA DE MADRID.

Author: HERNÁNDEZ DE LA SOTA CRISTINA.
Year: 2004.
University: POLITÉCNICA DE MADRID [More theses of this university] [www.upm.es].
Place of defense: FACULTAD DE INFORMÁTICA.
Place of preparation: FACULTAD DE INFORMÁTICA DE LA UNIVERSIDAD POLITÉCNICA DE MADRID.

Author: FERNANDEZ GONZALEZ JOSE RAMON.
Year: 2004.
University: OVIEDO [More theses of this university] [www.uniovi.es].
Place of defense: E.T.S. INGENIEROS DE MINAS.
Place of preparation: E.T.S. INGENIEROS DE MINAS DE OVIEDO.

Summary: The mine Reocin, one of the world's most important for the quality of its concentrated, ceased its activities in the year 2003, after one hundred and forty-seven years of operation. In this thesis is estudan the potential of water from the aquifer's Reocin, located in the same rock formation in which gun the site. The mining holes (inside and opencast) and karst cavities lead even large reservoir, partly underground, with a capacity Ede at least 24 million m3. The privileged position of the mine, in the central region of Cantabria, makes sense to think in the exploitation of this resource, either for industrial use or for domestic use. It analyzes divesos aspects related to the use of water (flow, quality, cleansing, etc.) and proposed actions in this regard. The study was completed by reviewing wings potential uses of escombresras, dams, buildings and other elements that were part of mining activity or were generated by it and are now idle. New uses are proposed, some of them already running.

Author: SARQUELLA GELI PERE.
Year: 2004.
University: GIRONA [More theses of this university] [www.udg.es].
Place of defense: ESCOLA POLITÈCNICA SUPERIOR.
Place of preparation: UNIVERSITAT DE GIRONA.