|
|
Models for predicting the thermal sensation and thermal comfort of a person
Nahácky, Marek ; Pokorný, Jan (referee) ; Kopečková, Barbora (advisor)
The bachelor thesis is focused on mapping of the current development of thermophysiological models for prediction of human thermal sensation and thermal comfort in thermal environment. These models vary in broad spectrum of conditions of their use. The first part is dedicated to definition of terms thermal sensation and thermal comfort. The second part focuces on comparison and more precise description of chosen thermophysiological models. At the end it was made a summarizing table of inputs and outputs of these models for prediction.
|
|
|
Measurement of indoor environment by means of thermal manikin
Ševeček, Jan ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
This dissertation deals with the measurement of the internal environment through thermal manikin Newton, especially in terms of thermal comfort. Measurements were performed in a typical office environment and cabins of small transport aircraft. The course of events and the time constants for the measurement in the office was given by real flow in the office when the sequences of events were unfolded from the usual transactions carried out during the day. In contrast, the second measurement, which took place in the model of small transport aircraft, the course of events and time constants, was performed exactly according to predetermined plan. The other parts of the thesis describe how to calibrate the manikin and then generate a diagram comfort zones. Following are compared individual test cases and events using the diagram comfort zones. Finally, individual test cases and events are compared using the diagram comfort zones and medics according to ISO 14505-2.
|
|
|
Creation of Sparse Adapter for the Code Listener Infrastructure
Pokorný, Jan ; Peringer, Petr (referee) ; Dudka, Kamil (advisor)
Program checking is indisputably important, especially if originating in formal methods. VeriFIT at FIT BUT uses custom Code Listener (CL) infrastructure modularly interconnecting the front-end, typically a code parser adapter, and the back-end, typically an analyser. Our aim is to offer a former as a compact alternative to existing GCC compiler plug-in. This adapter uses linearized code mediated by sparse library for static analysis of programs in C. According to the experiments with one of the main CL analysers, Predator tool and its tests suite, our product - clsp program - is successful successful in roughly 75% of cases in comparison with the GCC plug-in. Further improvements are expected.
|
|
|
System of Motivation in the Company
Pokorný, Jan ; Konečný, Štěpán (referee) ; Putnová, Anna (advisor)
The diploma thesis deals the analysis current incentive system in society and the subsequent proposal for its improvement. First part is theoretical basic for the problematic of motivation. In the theoretical part are explained the basic concepts associated with motivation of employees and we will focus on human resource management too. The next section analyses the current situation in selected company. On the basic of the analysis I will develop proposals that will increase the motivations of the employees.
|
|
|
Algorithms for Model Simplification
Pokorný, Jan ; Přibyl, Jaroslav (referee) ; Pečiva, Jan (advisor)
This paper is dedicated to simlification algorithms of polygonal models. First chapter deals with common principles of model simplification - features of polygonal models are explained here along with operations used in simlification. Next chapters introduce three simplification algorithms - Uniform Vertex Clustering, Floating Cell Vertex Clustering and Vertex Decimation. These methods are tested on a number of models and compared in various aspects - visual quality, aproximation time and geometric error of aproximation.
|
|
| |
|
|
Simulation of fluid flow around obstacles by Lattice Boltzmann Method
Prinz, František ; Pokorný, Jan (referee) ; Zatočilová, Jitka (advisor)
The task of this diploma thesis is the Lattice Boltzmann method (LBM). LBM is a mesoscopic method describing the particle motion in a fluid by the Boltzmann equation, where the distribution function is involved. The Chapman-Enskog expansion shows the connection with the macroscopic Navier-Stokes equations of conservation laws. In this process the Hermite polynoms are used. The Lattice Boltzmann equation is derived by the discretisation of velocity, space and time which is concluding to the numerical algorithm. This algorithm is applied at two problems of fluid flow: the two-dimensional square cavity and a flow arround obstacles. In both cases were the results of velocities compared to results calculated by finite volume method (FVM). The relative errors are in order of multiple 1 %.
|
|
|
Horizontal belt conveyor
Zeman, Petr ; Pokorný, Jan (referee) ; Špička, Jiří (advisor)
This project proposes a conveyor belt for given material and transport output. A functional calculation is carried out ČSN ISO 5048 which specifies main dimensions and propulsion proposal. Based on strength analysis, calculation of shaft of driving drum is performed. Individual components of conveyor are chosen from catalogues of the companies, which are engaged in these questions, whose products are accessible in the Czech Republic.
|
|
|
Automotive ventilation system - comparison of an influence of boundary conditions on flow from various types of ventilation outlets
Brdečko, Radim ; Pokorný, Jan (referee) ; Lízal, František (advisor)
Diploma thesis deals with a research of the flow in front of three different automotive vents. The velocity field and intensity of the turbulence was measured in detail, using thermoanemometry. After that the same data was measured with PIV method and validation was performed. The difference between achieved data was investigated. The design among the vents was also investigated, because it’s fundamentally affects the air flow. The purpose of this thesis is to obtain data about the velocity field using two methods and their subsequent use to validate numerical simulations, which will be performed in the future. The diploma thesis also contains the calculation of measurement uncertainty.
|
|
|
Numerical simulation of incompressible fluid flow by the spectral element method
Pokorný, Jan ; Hlavička, Rudolf (referee) ; Čermák, Libor (advisor)
Tato diplomová práce prezentuje metodu spektrálních prvků. Tato metoda je použita k řešení stacionárního 2-D laminárního proudění Newtonovské nestlačitelné tekutiny. Proudění je popsáno stacionarní Navier-Stokesovou rovnicí. Dohromady s okrajovou pod- mínkou tvoří Navier-Stokesův problém. Na slabou formulaci této úlohy je aplikována metoda spektrálních prvků. Touto discretizací se získá soustava nelineárních rovnic. K obrdžení lineární soustavy je použita Newtonova iterační metoda. Podorobný algorit- mus tvoří jádro Navier-Stokeseva solveru, který je naprogramován v Matlabu. Na závěr jsou pomocí tohoto solveru řešeny dva příklady: proudění v kavitě a obtékání válce. Přík- lady jsou řešeny pro různé Reynoldsovy čísla. První od 1 do 1000 a druhý od 1 do 100.
|
guest ::
