Photorealistic Rendering

Tato bakalářská práce se zabývá problematikou realistického zobrazování 3D scén, kde jsou popsány postupy vedoucí k fotorealistickému obrazu. Nejprve jsou uvedeny způsoby definice předmětů, jak je scéna vykreslena na displej, typy světelných zdrojů a povrchové charakteristiky materiálů. V práci se dále nachází popis lokálního osvětlovacího modelu, optických jevů a metod používaných k realistickému zobrazení (raytraycing, pathtraycing, radiozita a photon mapping). Další část zmiňuje důvod výběru téma a popis implementace metody raytraycing a photon mapping.This bachelor thesis deals with the realistic rendering of 3D  scenes, which describes the procedures leading to the photorealistic image. First are mentioned ways to definition objects, how the scene is rendered on screen, the types of light source and surface characteristics of materials. The work is also a description of the local shading model, optical phenomena and the methods used to realistically display (raytraycing, pathtraycing, radiosity and photon mapping). Next part mentions the reason for choosing the topic and description of implementation methods raytraycing and photon mapping.

Activating Visual Imagination: Ida Fink’s Tangible Narrative

Ida Fink’s short story “Traces” is a prime example of the conjuring power of a narrative that makes use of a photograph. Fink relies on the primacy given to the visual sense; in addition, she relies on a pervasive basic assumption regarding photography, namely that photos are faithful to the reality they capture, and correspondingly are endowed with a truth value. Yet the photo described by a witness to Nazi atrocities is perplexing: taken shortly after the murder of the village’s Jews, it is almost completely empty, since the only visible signs of life are the footmarks they left on the snow. Fink nonetheless manages to use this photo in her narrative and turn the existence of the traces’ owners into a tangible presence. Yet the testimony of the last survivor of the village is as fragile and problematic as the photograph is prone to manipulations. Both testimony and photograph perpetuate what cannot be seen, in a manoeuvre that reminds one of Jochen Gerz’s “vanishing memorial,” organically turning the invisible existence of the dead into cobble stones bearing the names of Jewish cemeteries upside down, so we may—or may not—be stepping on a replicated grave-stone. Both Gerz and Fink use barely visible traces as a constitutive middle ground for creator and reader / viewer, to demonstrate that the most powerful of visual capacities must be ceded to imagination

Vehicle – roadway numerical solution in frequency domain

Pri riešení problémov interakcie vozidlo – cesta vo frekvenčnej oblasti nás okrem iného zaujímajú funkcie frekvenčného prenosu. Predkladaný príspevok je venovaný teoretickému odvodeniu funkcií frekvenčného prenosu pre rôzne výpočtové modely nákladného vozidla a ich numerickému vyčísleniu v určitom frekvenčnom pásme. Numerické výsledky sú uvádzané pre vozidlo typu Tatra T815. Poukazujú napríklad na vzťah frekvenčnej skladby nerovností povrchu jazdnej dráhy k hodnotám kontaktných síl medzi kolesom vozidla a vozovkou.At the solution of the vehicle – roadway interaction problems in the frequency domain we are interested in the frequency response functions. The submitted paper is dedicated to the theoretical derivation of frequency response functions for various kind of a lorry computing models and their numerical evaluation in certain frequency band. Numerical results are introduced for the vehicle Tatra T815. For example they refer to the relation between frequency composition of road unevenness and tire forces

American public opinion relating to the Roosevelt court proposal of 1937

Following his election to the office of President of the United States, in 1932, Franklin D. Roosevelt began his attempt to overcome the economic difficulties caused by the depression of 1929. His program for recovery included the enactment by Congress of many new pieces of legistlation. A great amount of this legislation was ruled out by the Supreme Court as unconstitutional. Subsequently, the President on February 5, 1937, presented a proposal to alter the court system of the United States. This proposal brought forth a surge of public opinion throughout the nation. Sharp divisions of opinion occurred concerning the merits of the President\u27s suggested reform The purpose of this study to dermine, (1) the reactions of the electorate to the proposal; (2) the reactions of the various agencies of public opinion; (3) wheather these agency reactions were cuases or effects of public feeling; (4) the importance of public opinion in such a matter

The Silence of the LADs: Dynamic Genome-Lamina Interactions during ESC Differentiation

In a recent issue of Molecular Cell, Peric-Hupkes et al. (2010) use DamID to map the interactions between chromatin and the nuclear lamina (NL) in differentiating embryonic stem cells. NL-mediated locking/unlocking of genomic regions during differentiation provides an additional facet of transcription regulation

Mutual comparison of FRF for various vehicle computational models

Funkcie frekvenčného prenosu (FFP) charakterizujú odozvu dynamického systému vo frekvenčnej oblasti. Predkladaný príspevok porovnáva funkcie frekvenčného prenosu pre rôzne výpočtové modely vozidla. Ukazuje, že pokiaľ sú výpočtové modely dynamicky ekvivalentné, tak zodpovedajúce FFP sú prakticky zhodnéFrequency response functions (FRF) characterize the response of dynamic system in frequency domain. The submitted paper compares the frequency response functions for various vehicle computational models. It shows that while the computational models are dynamically equivalent than the FRF are practically identica

Two span bridge under moving load

The dynamic effect of the moving load on the bridge construction is the subject of the solution in this article. The bridge is modeled as two span continuous beam with two degrees of freedom. The assumption describing the dynamic deflection curve and the assumption describing the load distribution on individual lumped masses are adopted at the creation of bridge computational model. The plane computational model of heavy vehicle with five degrees of freedom is adopted. The problem is described by ordinary differential equations which are solved numerically by using MATLAB. The results are presented by graphical and numerical form

An investigation of the relationship between manufacturing policies and plant layout in a job shop

Utilizing CRAFT an optimum plant layout with regard to all products manufactured can be realized. In addition, two manufacturing policies; related to production and inventory control, will be investigated with respect to the effect of said policies on plant layout

Two-span bridge under moving load – numerical and experimental approach

From the point of view of bridge structures, the moving load is one of the most important components of the load. The analysis of the influence of moving load on bridges is carried out numerically or experimentally and can be traced in the literature since the year 1849. The first impulse was the collapse of the Chester Rail Bridge in England in the year 1847. The present paper analyses the effect of the moving load on a two-span bridge, both numerical and experimental way. The planar model of the vehicle and the bridge is adopted. The bridge is modeled as Bernoulli-Euler beam. The heavy vehicle is modeled as a discrete computational model with 8 degrees of freedom. Two approaches are used in numerical modeling. For the first time, the task is solved by the finite element method in the environment of the program system ADINA. The Newmark's method is used for the solution of equations of motion. The classic approach is used for the second time. A discrete computational model of a bridge with two degrees of freedom is used. Equations of motion are solved numerically in the environment of program system MATLAB by the Runge-Kutta 4th order method. The influence of vehicle speed on vertical deflections in the middle of individual bridge fields is analyzed in the speed range from 0 to 130 km/h with a step of 5 km/h. The detailed comparison of both numerical approaches is made at a vehicle speed of 70 km/h. The deflections of the bridge and the deflection of the vehicle are compared with each other. The correctness of the assumptions used in the numerical solutions was verified by measurement on a model beam in the laboratory. The results of the experimental tests were compared with the results of the numerical solution