La presente investigación desarrolla un análisis conceptual y visual de las obras de vivienda de Ricardo Bofill Taller de Arquitectura (RBTA) entre los años sesenta y setenta. Son cinco obras las que se analizan: Barrio Gaudí, Castillo Kafka, Muralla Roja, Xanadú y Walden-7; las cuales pertenecen al proyecto “La Ciudad en el Espacio”. En estas obras, Ricardo Bofill propone una arquitectura multifuncional y modular, mediante el diseño de la repetición de módulos en un plano proyectual. Además, propone una arquitectura flexible y adaptable, que pueda responder a las necesidades y actividades de los usuarios habitantes. Estas obras arquitectónicas referenciales se plantean como tema de inspiración para la creación y el desarrollo de indumentaria adaptable y multifuncional, enfocada en facilitar más de una solución y ser más útil para el usuario. / This research develops a conceptual and visual analysis of the housing projects of Ricardo Bofill Taller de Arquitectura (RBTA) between the sixties and seventies. There are five works that are analyzed: Barrio Gaudí, Castillo Kafka, Muralla Roja, Xanadú and Walden-7; which belong to the project "The City in Space". In these projects, Ricardo Bofill proposes a multifunctional and modular architecture, through the design of the repetition of modules in a project plane. In addition, he proposes a flexible and adaptable architecture that can respond to the needs and activities of the resident users. These referential architectural projects are proposed as a theme of inspiration for the creation and development of adaptable and multifunctional clothing, focused on facilitating more than one solution and being more useful for the user. / Trabajo de investigación

This Thesis describes the design, assembly, programming, and evaluation of the BLDS-M-RAKE, the newest addition to the family of devices called the Boundary Layer Data System (BLDS). The BLDS-M-RAKE is a continuation of the BLDS-M series of devices, a modular approach with updated electronics for boundary layer measurements. The BLDS-M-RAKE records data from a number of sensors, intended to be routed to an array of probes, or rake. Through preliminary testing, a new flexible manifold design from molded silicone and the hardware used on the RFduino development boards from the BLDS-M proof-of-concept modules were validated for use in the final prototype design. A PCB was designed to house a Simblee System on a Chip (SOC), 11 Honeywell pressure sensors, a microUSB socket, a microSD socket, a DC-DC boost regulator, and two AAA cells. The SOC was then programmed in C++ with the Arduino IDE. The Simblee was programmed to prompt a user over a serial monitor to confirm test parameters from a configuration file and then coordinates the reading and recording of sensor data during a flight test. Problems after assembly did not allow a full evaluation of the board, but the following was concluded: the sleeping board current draw was less than 3 mA and the peak current draw was less than 30 mA. The sensors could be sampled at 100 Hz and recorded to the microSD card. The flexible manifolds molded from silicone are viable for future designs.

In this diploma thesis I dealt with proposal of optimization security algorithms calculations, that will be implemented on smartcards. This project is based on knowledge of modular arithmetic, that is used in many encryption like public keys, digital signatures and has function. The result of this project is a design of changes for accelerate the security algorithms calculations.

Philosophiae Doctor - PhD / The framework agreement in the year 2000 by the international community to launch Generation IV program with 10 nations, to develop safe and reliable nuclear reactors gave rise to the increased interest in the studies of SiC and the effect of different irradiations on solids. Silicon carbide is a preferred candidate used in harsh environments due to its excellent properties such as high chemical stability and strong mechanical strength. The PBMR technology promises to be the safest of all nuclear technology that have been developed before. SiC has been considered one candidate material being used in the fabrication of pebble bed fuel cell. Its outstanding physical and chemical properties even at high temperatures render it a material of choice for the future nuclear industry as whole and PBMR in particular. Due to the hostile environment created during the normal reactor operation, some of these excellent properties are compromised. In order to use this material in such conditions, it should have at least a near perfect crystal lattice to prevent defects that could compromise its strength and performance. A proper knowledge of the behavior of radiation-induced defects in SiC is vital. During irradiation, a disordered crystal lattice occurs, resulting in the production of defects in the lattice. These defects lead to the degradation of these excellent properties of a particular material. This thesis investigates the effects of various radiation effects to 6H-SiC. We have investigated the effects of radiation induced damages to SiC, with a description of the beds and the importance of the stability of the SiC-C interface upon the effects of radiations (y-rays, hot neutrons). The irradiated samples of 6H-SiC have been studied with various spectroscopic and structural characterization methods. The surface sensitive techniques such as Raman spectroscopy, UV-Vis, Photoluminescence and Atomic Force Microscopy will be employed in several complimentary ways to probe the effect of irradiation on SiC. The obtained results are discussed in details.

The objective of this thesis is the design of an air-water heat pump for heating buildings. The proposed design solution is based on innovative technical concept of a modular system which brings new qualities for the apparatus. One of the major goals of the thesis was to design a versatile system which would replace a wide product range of heat pumps with different heat outputs. The thesis is based on the research part in which an evolution in the field of heat pumps is briefly introduced, followed by the technical and design analysis of present production. The design report contains the description of identified design problems, shows variant design concepts, alternative solutions of parts and details, and finally a detailed description of the definite solution accompanied by a product mock-up in 1:3 scale.

This thesis describes the design and construction of modular robotic system. Proposal of its management and simulation parameters given.

Balíčkovací systém RPM poskytuje pohodlné řešení pro správu a distribuci softwaru. Z pohledu vývojáře s ním pracujícího, je hlavní činností tvorba balíčků vhodných pro širokou distribuci. Tento proces obnáší řadu činností, které jsou pro velké množství softwaru podobné, či zcela totožné. Bylo by tedy vhodné mít možnost, tyto opakované činnosti co nejvíce a nejjednodušeji zautomatizovat, aby se usnadnila práce vývojářům a zmenšil prostor pro možné chyby. Cílem této práce je analýza požadavků, návrh a implementace modulárního skeneru do nástroje rpmbuild - části RPM starající se o tvorbu balíčků. Tento modulární skener bude poskytovat API ke sledování a modifikaci procesu sestavování balíčku a umožní snadnou tvorbu modulů doplňujících funkcionalitu pro zjednodušení a zefektivnění procesu balíčkování.

Cette thèse a pour objet l'étude de quelques propriétés arithmétiques et géométriques des variétés de Shimura orthogonales. Ces variétés apparaissent naturellement comme espaces de modules de structures de Hodge de type K3. Dans certains cas, elles paramètrent des objets géométriques tels que les surfaces K3 et leurs analogues en dimensions supérieures, les variétés hyperkähleriennes. Ce point de vue modulaire sera notre fil conducteur tout au long de ce mémoire. Ainsi, dans la première partie, on démontre un résultat d'équirépartition du lieu de Hodge dans les variations de structures de Hodge de type K3 au dessus d'une courbe complexe quasi-projective. Dans la deuxième partie, on étudie des analogues arithmétiques du résultat précédent. Un exemple d'énoncés qu'on obtient est le suivant: étant donnée une surface K3 définie sur un corps de nombres et ayant partout bonne réduction, alors sous certaine hypothèse d'approximation, il existe une spécialisation telle que le nombre de Picard géométrique croît strictement. Dans la troisième partie, on relie les problèmes du saut de nombre de Picard dans les familles de surfaces K3 à la question de construction de courbes rationnelles sur ces surfaces. Enfin, on étend un résultat de Bogomolov et Tschinkel. On montre notamment que toute surface K3 définie sur un corps algébriquement clos de caractéristique quelconque et admettant une fibration elliptique non-isotriviale contient une infinité de courbes rationnelles. / This thesis deals with some arithmetical and geometrical aspects of orthogonal Shimura varieties. These varieties appear naturally as moduli spaces of Hodge structures of K3 type. In some cases, they parametrize geometric objects as K3 surfaces and their analogous in higher dimensions, the hyperkähler varieties. This modular point of view will be our guiding principle throughout this dissertation. In the first part, we prove an equidistribution result of the Hodge locus in variations of Hodge structures of K3 type above complex quasi-projective curves. In the second part, we study analogous results in the arithemtic setting. An example of statements we get is the following: given a K3 surface having everywhere good reduction and satisfying an approximation hypothesis, there exists a specialization with strictly increasing geometric Picard rank. In both cases, our methods take advantage of the rich arithmetic, automorphic and geometric structure of orthogonal Shimura varieties as well as the Kuga-Satake construction that links them to moduli spaces of abelian varieties. Finally, we extend a result of Bogomolov and Tschinkel. In particular, we show that any K3 surface defined over an algebraically closed field of arbitrary characteristic and admitting a non-isotrivial elliptic fibration contains infinitely many rational curves.

The Pebble Bed Modular Reactor (PBMR) is a high temperature graphite-moderated nuclear reactor that uses helium as a coolant. The triple coated (TRISO) particles contain enriched uranium oxide fuel which is coated with layers of various forms of pyrolytic carbon and silicon carbide. The TRISO particles are further embedded in the matrix of spherical graphite pebbles. The graphite matrix is a composite moulded from a compound containing natural flake graphite (64 wt.%), synthetic graphite (16 wt.%) and a phenolic resin binder (20 wt.%) heated to 1800 °C in inert atmosphere. The graphitic composite provides structural integrity, encasement and act as a moderator material. In this work, low density model graphite composites similar to those used in nuclear applications as encasement material in fuel pebbles were made by uniaxial cold compression moulding. The graphitic composites contained various ratios of natural flake graphite and synthetic graphite at fixed phenolic novolac resin binder content of 20 wt.% (green state). The fabrication process employed entails mixing the graphite powders, followed by addition of methanol phenolic resin solution to the graphite powder mix, drying, grinding, milling and sieving; and finally compression moulding in a stainless steel die at 13 MPa using a hydraulic press. The green moulded disc specimens were then carbonized at 900 °C in nitrogen atmosphere to remove volatiles followed by annealing at 1800 °C in helium atmosphere. The annealing step diminishes structural defects and result in densification of the composites. The microstructure of fabricated graphitic composites was characterized using various techniques. Particle Size Distributions determined using Laser diffraction showed that the inclusion of the binder leads to agglomeration. The composite powders had larger mean particle sizes than the raw graphite powders showing the binding effect of the novolac phenolic resin. X-ray diffraction studies showed that the graphitic composites had a hexagonal crystal structure after annealing. Raman spectroscopy revealed the presence of the structurally disordered phase derived from the resin carbon (indicated by the pronounced D-band in the Raman spectra). XRD and Raman observations were consistent with literature and gave results supporting existing knowledge base. Optical microscopy revealed a flake-like microstructure for composites containing natural graphite and needle-coke like particles for composites containing mainly synthetic graphite. Optical microscopy confirmed that the effect of the manufacturing route employed here was to align the particles in the direction perpendicular to the compression moulding direction. As a result, the graphitic composites exhibited anisotropic property behavior. The bulk density of the composites increased with the increase in the natural graphite content due to compactability of natural flakes in the manufacturing route. Thermogravimetric analysis studies on the composites showed that they were stable in air to 650 °C. Composites containing mainly synthetic graphite were thermally more stable in air compared to their natural graphite counterparts. The linear coefficients of thermal expansion of the composites were measured using thermomechanical analysis (20-600 °C). In the moulding direction, the average CTE (αP) values were in the range (5-9) × 10-6 K-1 and increased with increment in the natural graphite content in the composite. In the direction perpendicular to moulding direction, the average CTE (αN) values were in the range (1.7-2.1) × 10-6 K-1 showing that the expansion was similar or constant in this direction. Therefore an anisotropic expansion ratio, i.e. αP:αN, of about 3 was observed in the composites. This anisotropy is attributable to the alignment of the filler particles in the manufacturing route. The thermal conductivity of the annealed composites were measured in the pressing direction from 100 to 1000 °C and the values ranged from 19 to 30 W m-1 K-1. Anisotropy was also observed as far as strength was concerned. A composite containing 64:16:20 wt.% ratio had the best mechanical properties, high thermal conductivity and slightly high expansion coefficient. This work demonstrates the complimentary properties of the graphite fillers in the composites. It also reports for the first time, data on the effect of variation of the filler graphites on microstructure and properties of model low density compression moulded graphitic composites. / Thesis (PhD)--University of Pretoria, 2013. / gm2014 / Chemistry / unrestricted

Various techniques are used in the process of software development. The requirements of the system being designed and the constraints dictate the selection of a particular method to be used. This thesis attempts to explain the various types of development techniques available to software designers and programmers. It places specific emphasis on the Object Oriented style of design that is presently widely used in all areas of industry. Object Oriented Programming (OOP) involves a number of new concepts that make software design and development more modular. The actual problem is broken down into a number of smaller components and the functionality of each component is coded separately. These pieces of code are then integrated to form the final application. All the concepts that make this type of programming possible are explained. The thesis presents a detailed account of the development process of a system used to make measurements on polyurethane pads that are used in the Chemical Mechanical Planarization (CMP) process. The setup uses a combination of a number of instruments to provide excitation to the pad and measure its response. A computer controls all these instruments using a single application. Microsoft Visual C++ was used to develop this application. It makes extensive use of a Graphic User Interface (GUI), Microsoft Foundation Classes (MFC) and driver libraries from instrument manufacturers in order to present a user-friendly interface to the operator. System Integration, which is the technique used to make the instruments involved interact with the software is explained. The application involves the use of a number of C++ classes and dialog boxes. Each of these is explained along with the underlying algorithms.