Title: Construction of elementary pupils' geometric schemas via motivating learning environments Author: Jaroslava Kloboučková Department: Department of mathematics and mathematics education Supervisor: doc. RNDr. Darina Jirotková, Ph.D. Abstract: The aim of the dissertation is to discuss teaching geometry as integral part of mathematics education at the primary school level. The thesis also documents a longitudinal teaching study which was initiated in 2010 and which gives us a base for discussion of some fundamental questions regarding the process of learning geometry for pupils in their early school years. The main objective here is to attempt to answer the following four didactic questions: In which way do pupils learn about geometrical objects? How do they share their geometrical knowledge, experience and discoveries with one another? How much (at what level) are they able to understand mathematical concepts that the official curricular documents (the Czech Framework for Education Program) place in later years of schooling? What phenomena are they able to grasp and describe using their mother tongue? The theoretical framework focuses on the learning process and the typology of mathematical problems in geometry. Four specific engaging environments (Cube Buildings, Origami, Wooden Sticks, and Tiles) and...

The following qualitative research explores the adoption of Zero Trust in organisations from an organisational and user acceptance perspective. From an organisational perspective, the research highlights essential aspects such as testing the Zero Trust architecture in a pre-adoption phase, involving top management in the planning phase, communicating in a non-technical language, and making end-users feel a personal connection to IS security. The research highlights the importance of balancing the ease of use with security, evaluating the end-user's technical maturity, and carrying out evaluations from a user acceptance perspective. To gather valuable empirical data, the researcher has conducted semi-structured interviews with highly competent respondents within the field of Zero Trust. Most of the literature available today within Zero Trust focuses on technical aspects, and this research is a unique and vital contribution to the limited available research.

No / Security is a function of the trust that is associated with the active variables in a system. Thus, the human factor being the most critical element in security systems, the security perimeter could be defined in relation to the human trust level. Trust level could be measured via positive identification of the person/device on the other side of the interaction medium, using various authentication schemes; location-based being one of the latest. As for the location-based services, the identity of a customer remains hazy as long as his location is unknown; he virtually remains a ghost in the air, with implications on trust. This paper reviews the various location-based authentication techniques with a focus on the role that GPS could play in optimising this authentication approach. It advocates the urgent need to make all transmission devices GPS-compliant as a way forward, despite the privacy issues that might arise.

Les problèmes inverses consistent à retrouver une donnée qui a été transformée ou perturbée. Ils nécessitent une régularisation puisque mal posés. En traitement d'images, la variation totale en tant qu'outil de régularisation a l'avantage de préserver les discontinuités tout en créant des zones lisses, résultats établis dans cette thèse dans un cadre continu et pour des énergies générales. En outre, nous proposons et étudions une variante de la variation totale. Nous établissons une formulation duale qui nous permet de démontrer que cette variante coïncide avec la variation totale sur des ensembles de périmètre fini. Ces dernières années les méthodes non-locales exploitant les auto-similarités dans les images ont connu un succès particulier. Nous adaptons cette approche au problème de complétion de spectre pour des problèmes inverses généraux. La dernière partie est consacrée aux aspects algorithmiques inhérents à l'optimisation des énergies convexes considérées. Nous étudions la convergence et la complexité d'une famille récente d'algorithmes dits Primal-Dual.

Die Anwendungsmöglichkeiten und Potenziale des temperierten Innenhochdruck-Umformens mit flüssigen Wirkmedien (T-IHU) von Rohren aus verschiedenen Magnesium- und Aluminiumknetlegierungen werden in der vorliegenden Arbeit aufgezeigt. Neben der Werkstoff- und Halbzeugcharakterisierung, der Auslegung von temperierten Innenhochdruck-Umformanlagen und –werkzeugen, den Thermografiemessungen am Halbzeug unter Realbedingungen und der Verifizierung der Simulationsergebnisse des T-IHU-Werkzeuges war der inhaltliche Schwerpunkt die systematische experimentelle Bestimmung der maximalen Umfangserweiterung ∆u_max in Anhängigkeit von der Umformtemperatur ϑ_u, dem Werkstoff und der Wanddicke s₀ im Temperaturbereich von 22°C bis 300°C an drei Versuchsgeometrien T-Stück, Zylinder und Quader bei Innendrücken bis 800 bar. Neben dem Einfluss der Prozessparameter, der Werkstoff- und Halbzeugeigenschaften und der Ausgangswanddicke wurde der signifikante Einfluss der Umformtemperatur und der Umformgeometrie auf die erreichbaren Umfangserweiterungen herausgearbeitet und systematisch dargestellt. Es wurden Umfangsdehnungen von bis zu 120 % (bei ϑ_u = 300°C) erzielt. Die experimentelle Bestimmung der minimal auszuformenden Bauteilaußenradien erfolgte unter Anwendung der statistischen Versuchsplanung. Aus den Regressionsgleichungen wurde eine neue Berechnungsgleichung für den maximalen Innendruck p_imax generiert. Durch die Verifikation dieser Gleichung konnte die hohe Genauigkeit bei der Vorausberechnung des erforderlichen Innendruckes bei einem vorgegebenen minimalen Bauteilaußenradius R_min in Abhängigkeit von der Zugfestigkeit R_m als f (Umformtemperatur) und der Wanddicke s₀ nachgewiesen werden. Die Auslegung der T-IHU-Werkzeug- und Anlagentechnik kann damit wesentlich genauer er­folgen. Durch die Bauteilanalysen nach dem T-IHU-Prozess konnten die hohe Maß- und Formgenauigkeit und die hohe und gleichmäßigere Oberflächengüte nachgewiesen werden. Trotz der beginnenden dynamischen Rekristallisation lag bei allen Versuchswerkstoffen eine Erhöhung der Werkstofffestigkeit in der Umformzone vor. Bei den Untersuchungen bzgl. des T-IHU des Realbauteiles „PKW-Querträger vorn“ konnten die Kenntnisse der Grundlagenuntersuchungen auf ein komplex geformtes Realteil übertragen und erweitert werden. Es zeigte sich, dass der Einsatz von T-IHU-Magnesiumbauteilen ein erhebliches Potenzial für weitere Gewichtsreduzierungen von Leichtbaukonstruktionen besitzt. / This paper presents the potential applications of temperature-supported hydroforming of various magnesium and aluminium alloy tubes using active liquid media. It includes details of material and semi-finished product characterisation, the design of temperature-supported hydroforming equipment and tools, thermography measurements on the semi-finished product under real conditions and verification of simulation results for the temperature-supported hydroforming tool. The main focus, however, was the systematic, experimental approach to determining the maximum increase in perimeter ∆u_max as a function of the forming temperature ϑ_u, the material and the wall thickness s₀ in the temperature range 22°C to 300°C for three trial geometries (T‑piece, cylinder and cuboid) at internal pressures of up to 800 bar. In addition to studying the effect of process parameters, material properties, semi-finished product characteristics and initial wall thickness, the paper also presents the finding that forming temperature and forming geometry have a significant impact on achievable increases in perimeter. Perimeter expansions of up to 120 % were attained (at ϑ_u = 300°C). Statistically designed experiments were used to determine the minimum component outside-radii to undergo the forming process. A new equation for calculating the maximum internal pressure p_imax was generated from regression equations. By verifying this equation, it was possible to demonstrate the high level of accuracy in predicting the internal pressure required for a given minimum component outside-radius R_min as a function of the tensile strength R_m as f(forming temperature) and of the wall thickness s₀. This means that the temperature-supported hydroforming tool and system equipment can be designed far more accurately. Component analyses after the temperature-supported hydroforming process demonstrated the high level of dimensional and geometrical accuracy and the high quality and more consistent surface finish. Despite the onset of dynamic re-crystallisation, the strength of the material was increased in the forming zone in all the materials tested. The knowledge gained from researching the fundamental principles was applied to a real component with a complex shape in studies of temperature-supported hydroforming of the "front car cross-member", which provided further useful insights. It was found that the use of temperature-supported hydroforming magnesium components has considerable potential for further weight reduction in lightweight constructions.

Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-09-05T22:41:22Z No. of bitstreams: 1 LINDALVA SILVA CORREIA MAIA - DISSERTAÇÃO PPGERR 2004..pdf: 7686421 bytes, checksum: 3e2b7f04a88de15584d4b5bb2da2fd2c (MD5) / Made available in DSpace on 2018-09-05T22:41:22Z (GMT). No. of bitstreams: 1 LINDALVA SILVA CORREIA MAIA - DISSERTAÇÃO PPGERR 2004..pdf: 7686421 bytes, checksum: 3e2b7f04a88de15584d4b5bb2da2fd2c (MD5) Previous issue date: 2004 / 0 processo de modernização a que foi submetida à agricultura brasileira nas últimas décadas, engendrou profundas modificações, não apenas na base técnica do processo produtivo, mas também nas relações de trabalho, nas relações intersetoriais que se estabeleceram entre agricultura - indústria c, principalmente, nas relações sociais de produção. As mudanças, resultantes nas relações sociais de produção, tendem a estabelecer repercussões significativas na estrutura de classes sociais no campo, encaminhando os pequenos produtores a um processo de diferenciação social. Neste trabalho buscou-se analisar esse processo entre os pequenos produtores de frutas, nos Projetos Irrigados do Submédio São Francisco, na região de Petrolina (PE) mais especificamente, Bebedouro c Nilo Coelho. Neste ambiente logrou-se verificar os principais condicionantes da desigualdade de rendimentos, que possam estar encaminhando os pequenos produtores pesquisados a uma mobilidade na estrutura de classes sociais cm que se encontram. Para tanto, foram analisados aspectos de ordem qualitativa, concernentes ao perfil social dos produtores e, quantitativos referentes ao comportamento produtivo dos atores sociais envolvidos no processo, como importantes diretrizes que permitissem o entendimento dessa relação que se estabelece pelo desenvolvimento do capitalismo na agricultura. As evidencias apresentadas pelos dados discutidos no trabalho identificaram que, de forma geral, os colonos revelaram-se diferenciados, tanto nos aspectos qualitativos quanto aos quantitativos. Demonstraram ainda, uma ampla margem de resistência aos desafios concorrenciais com as empresas agrícolas, assim como capacidade de resposta às exigências de modernização tecnológica c reestruturação produtiva. / The process of modernization that the Brazilian agriculture has been submitted to in the last decades, has engendered profound modifications not only in the basic technique of the production process, as in work relations as well as the relation of the sectors that have been established between Agriculture and Industry, and mainly the relations of social production. The results of changes in the social relation of production tend to establish significant repercussions in the structure of the social field classes, conducting the small farmers to process social differences. This study was based on the analysis between the small fruit farmers, from Irrigation Projects of the sub medium region of the São Francisco valley, in Petrolina PE, more specifically, in Bebedouro and Nilo Coelho. In this deceitful environment the main condition of uneven revenue was verified, which could be leading the small producers surveyed to the social class structure, which they are found. Therefore, the aspects in the order of quality, concentrated on the social profile of the producers and how much it refers to the productive behavior of the social factors involved in the process, such as the important directives that would permit the understanding of this relation that was established in the development of capitalism in the agriculture. The evidence presented by the data discussed in this study identify that, usually the colonials reveal themselves indifferently, as much as in the aspects of quality and quantity, revealing a great resistance from the farmers to the challenges of commercial rivalry with the agricultural industries as well as the capacity of resporse to the demands of the modernized technology and production restructuring.

The article describes how to produce energy necessary for sensor supply. These generators are used as a local source operating on vibratory principle. Mechanical vibrations that occur in moving machines, in nature etc. are used in order to gain required energy. So are kinesis principles and analysis employed in some of the avaible generators. It also contains patent and literary background research. Work is oriented to solving mechatronic perimeter, in the concrete micro - generator. Mechatronic perimeter piles from seat power control parts and mechanical parts, where common solving equation system leads to correct solving. Mentioned analyses be of consequence for usage optimization methods artificial intelligence. Optimization method are used on optimum solving proposal micro - generator. To inquest dynamism system was used program Simulink (part of MATLAB), generator is buckthorn for f = 17 [Hz] acceleration yam = 0,5g [ms-2]. As a algorithm is used SOMA – All to one.

In my thesis I go about principles and methods of security systems, then I go about analysis of avalaible types of security systems (EPS, EZS and CCTV). I have written about their possibile use in design security building. I have described levels of project documentation and its different parts including process service of production a project documentation for security system. I used all knowledges in the end of my thesis, when I designed and integrated security system for a special building.

The content of this thesis is the complex security system proposal, specifically of PZTS system and CCTV system. The thesis is divided into three parts. The first part is analysis of the current state, the second is theoretical part and the third part is a practical part. The first part deals with the analysis of the current state of physical security and technical protection of the premises. The theoretical part deals with theoretical solutions for security system proposal. The practical part is focused on separate PZTS and CCTV systems proposal, that will meet all the requirements and standards of the customer.

The project addresses the design documentation of a residential building. It is a detached house. The building has one basement and three floors. Residential house is a basement with a flat roof. The structural system consists of reinforced concrete columns and reinforced concrete ceiling. Perimeter and interior masonry infill masonry infill is composed of blocks YTONG. The roof is a single casing. The construction is based on the foundation footings and passports.