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Experiment kit for the law of force
CÍSAŘ, Aleš
This master's thesis deals with the development and implementation of an affordable trolley set intended for the demonstration of Newton's second law in the framework of teaching physics in primary and secondary schools. The aim of the work was to design, manufacture and test an educational tool that would not only be effective and pedagogically beneficial, but also available to a wide range of educational institutions thanks to the use of modern production technologies such as 3D printing. In the theoretical part of the thesis, a review of current pedagogical approaches to teaching physics and identification of key requirements for educational tools focused on physics experiments was carried out. The practical part is dedicated to a specific design and prototyping of the wheelchair set, including the development of associated worksheets and methodological materials for students and teachers. The pilot testing of the educational benefit of the wheelchair set was carried out in different classrooms, where the reactions of students and teachers were monitored and feedback was obtained for further improvement. The results of the testing showed that the wheelchair set significantly improves the understanding of Newton's second law among students and increases their motivation to actively participate in the learning process. This thesis provides a detailed overview of the development, application and testing research of the innovative teaching tool and its significant benefits for teaching physics. The potential of integrating modern production technologies into the development of educational materials and their influence on making quality and interactive education in the natural sciences more accessible is emphasized.
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Catheter-based left atrial appendage closure
Hozman, Marek ; Osmančík, Pavel (advisor) ; Bulava, Alan (referee) ; Havránek, Štěpán (referee)
Transseptal puncture in left atrial appendage closure guided by 3D printing and multiplanar CT reconstruction Abstract Introduction: The presented study investigates the application of bi-atrial 3D printed models to guide transseptal puncture (TSP) in left atrial appendage occlusion (LAAC). The objectives are to (1) test the feasibility of 3D printing (3DP) for TSP guidance, (2) analyse the distribution of the optimal TSP locations, and (3) define a CT-derived 2D parameter suitable for predicting the optimal TSP locations. Methods: Pre-procedural planning included multiplanar CT reconstruction, 3D segmentation, and 3DP. TSP was pre-procedurally simulated in vitro at six defined sites. Based on the position of the sheath, TSP sites were classified as optimal, sub-optimal, or non-optimal. The aim was to target the TSP in the recommended position during the procedure. Procedure progress was assessed post hoc by the operator. Results: Of 68 screened patients, 60 patients in five centres (mean age of 74.68 ± 7.64 years, 71.66% males) were prospectively analysed (3DP failed in one case, and seven patients did not finally undergo the procedure). In 55 patients (91.66%), TSP was performed in the optimal location as recommended by the 3DP. The optimal locations for TSP were postero-inferior in 45.3%, mid-inferior in...
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Form finding of shell structures
Musil, Jiří ; Bažant, Zdeněk (referee) ; Vítek,, Jan (referee) ; Stráský, Jiří (advisor)
The theme of this doctoral thesis is the design of concrete shell structures with the focus on finding their optimal shape. The optimal shape of a concrete shell is the shape in which for a given load (usually the dead weight of the structure) no significant bending moments are generated in the shell and the structure is in the so-called membrane state. The inspiration for this thesis is the work of Swiss engineer Heinz Isler, who developed the shapes of shell structures using model tests of appropriately loaded flexible membranes. He developed the shell structure for large spans by inverting the resultant shape, which carried its weight almost entirely via membrane forces. The numerical solution of the above experiments using Midas Civil is presented herein. The basic principles of the method are demonstrated on the example of sagged cable. The numerically found shapes are compared with the analytical solution. A shell is designed based on the numerically found shapes and its stress response to dead load is described, particularly in relation to the membrane action. In the next part, the acquired knowledge and methods were used to design three relatively complicated shell structures. Each structure was statically analysed and its static behaviour was described. Structures with perfectly rigid or flexible supports, which simulate real behaviour of the supports, were studied. In the final phase, the results of static analysis of the selected shell were experimentally verified on a physical model in a scale of 1: 55.56. The model has been built using 3D printing. The thesis describes the use of a modelling similarity, the model design, the production process, and the experiment. The load test confirmed the optimal design of the shell structure and the validity of the numerical method for finding their shapes.
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Product Innovation Using CAE and Additive production
Bočková, Pavla ; Videcká, Zdeňka (referee) ; Vyroubal, Petr (advisor)
This bachelor thesis is focused on the design and construction of an innovated shape of the clamping mechanism of the one-handed dumbbell. The clamping mechanism model and other parts of the dumbbell are modelled using the parametric modeler called SolidWorks. The resulting model is printed on the Ultimaker 2+ 3D printer using the Fused Depositionion Modeling method. The thesis also includes the introduction of selected CAx systems, the characteristics of Rapid Prototyping as well as the FDM method and materials used. The end of the thesis is completed by the technical economic evaluation of the production of the proposed prototype of a one-handed dumbbell.
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Design of a chess manipulator
Novák, Tomáš ; Parák, Roman (referee) ; Cejpek, Zdeněk (advisor)
The bachelor’s thesis deals with a design and realization of a chess manipulator and its controlling through a graphical user-friendly interface. The theoretical part is divided into two sections, a brief insight into manipulation technique and a more in-depth characteristic of robotic manipulators. The practical part focuses on the chosen chess set and a concept of the robotic manipulator. The following parts then describe the structural units, motor and control units and electronic components. Additionally involves the practical part the design and implementation of the manipulator via the Arduino and the user interface. In the final part is created a functional model and designed possible future improvements and development.
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Design of linear clock
Firla, Marek ; Malý, Martin (referee) ; Svoboda, Petr (advisor)
The main goal of this thesis is to describe the design, construction, and manufacture of linear clocks. The first part describes the current linear clocks design. The second part describes the design of a linear clock prototype. The linear clock is controlled by an Arduino UNO microcontroller unit, the time is measured by the real-time module, the movement of the time indicators is mediated by a pair of stepper motors. Manufacture is done using 3D printing.
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Functional foams with densit ygradient
Svatík, Juraj ; Figalla, Silvestr (referee) ; Jančář, Josef (advisor)
Vycházíme-li z lehčených přírodních materiálů, lze od porézních materiálů s gradientem porozity očekávat mechanické vlastnosti nadřazené konvenčím polymerním pěnám, a to díky jejich specifické architektuře. Tyto vlastnosti umožňují použití lehčených materiálů jako strukturních prvků. V této práci je popsaná příprava gradientních porézních materiálů pomocí laminování a/nebo 3D tisku. Provedeny byly statické a dynamické mechanické testy na obou kvazi homogenních a gradientně porézních pěnách poskytující experimentální podklad pro hypotézu deformační odezvy plynoucí ze strukturní architektury. Data se interpretovala užitím zavedených teoretických modelů. Naše výsledky vedly k závěru, že tyto teoretické modely odvozené od pěn s pravidelnou strukturou není vhodné aplikovat pro pěny s gradientem porozity, protože prokazují podstatně lepší mechanické vlastnosti než homogenně porézní pěny.
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A proposal and manufacturing of temporary dental restoration
Jiroušek, Jan ; Sliwková, Petra (referee) ; Sedlák, Josef (advisor)
This bachelor thesis deals with manufacturing of temporary dental restoration. Theoretical part contains an overview of types of dental restorations and their division, Furthermore it states important properties and division of the dental materials used nowadays. The next point of theoretical part is an overview of the technologies of dental restorations manufacturing used at present. Practical part is aimed at manufacturing of temporary dental restoration by using the digitization by intraoral scanning, design of restoration in CAD software and CAD/CAM manufacturing. The thesis is concluded with discussion comprising a summary and evaluation of the results of single steps from practical part.
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Design of mechanical, electrical construction and software equipment of autonomous cell "Soda maker" for Industry 4.0 testbed.
Dvorský, Petr ; Baštán, Ondřej (referee) ; Kaczmarczyk, Václav (advisor)
The objectives of this bachelor thesis are design and realization of an autonomous cell for soda production for the testbed of Industry 4.0. First, basic construction principles of the autonomous cell are outlined. Then, the mechanical design, the hydro pneumatic system design, the electrical design and the software design are described. The drawing of the mechanical construction of the cell was devised using CAD NX 12 (Siemens PLM software). Most of the 3D printed parts were printed on 3D printer Tarantula. Hydro-pneumatic system was designed in SMC PeuDraw 2.8 for maximal working pressure of 8.2 Bar. Electrical documentation was created in electrical CAD software WSCAD. For control and communication, the autonomous cell is equipped with PLC SIMATIC S7-1200 (CPU 1214C DC/DC/DC), HMI panel (SIMATIC HMI KPT400 BASIC) and Linksys SD205 switch. The source code for control PLC and HMI was designed in TIA Portal software.
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