Testsuite of Frontend of Installation Tool Anaconda

Cílem této práce je prozkoumat principy a dostupné nástroje pro automatizované testování grafického uživatelského rozhraní. Jeden z těchto nástrojů je rozšířen a použit pro návrh a implementaci testů instalace linuxové distribuce Fedora programem Anaconda. Je implementována možnost dynamického generování testovacích případů z menších částí.The aim of this work is to examine principles and tools for automated graphical user interface testing. One of this tools is chosen and modified for implementation of testsuite of Fedora Linux installation using Anaconda. Dynamic generation of test cases from smaller parts is also implemented.

Analysis of Data on Social Networks Based on Data Mining

Tato diplomová práce se zabývá dolováním z dat v prostředí sociálních sítí. Představuje dolování z dat jako takové a jeho možné využití při dolování ze sociálních sítí. Dále se zabývá analýzou aplikačních rozhraní sociálních sítí Facebook, Twitter, Google+, LinkedIn a GitHub z pohledu dolování z dat. Představuje implementaci aplikace, která slouží pro stažení datasetu ze serveru GitHub, zabývá se experimenty se získaným datasetem a návrhem a implementací aplikace, která provádí datovou analýzu míry budoucí aktivity projektu.This thesis deals with data mining on social networks. It introduces data mining itself and its utilization on data analysis on social networking services. It analyses APIs of Facebook, Twitter, Google+, LinkedIn and GitHub with respect to data mining. It presents implementation of application for downloading dataset from GitHub and it deals with experiments with obtained dataset. Finally, it introduces design and implementation of application that analyses future project activity.

Entrepreneurial Project

Tato diplomová práce se zabývá návrhem na zlepšení konkurenčního postavení podniku pomocí optimalizace a reorganizace výroby ve společnosti ACO Industries k.s. Práce se zabývá také podpůrnými nástroji pro reorganizaci a optimalizaci výroby, mezi které patří zejména řízení „štíhlé výroby“. Hlavním přínosem této práce je redukce času a nákladů výroby, aby společnost mohla efektivně navyšovat tempo výroby za cílem dosáhnutí zdvojnásobení produkce a obratu v roce 2020.This diploma thesis deals with the proposal of improving company competition standing with the use of optimization and reorganization of production in ACO Industries k.s. This thesis also deals with supporting tools for reorganization and optimization of production, such as for example “slim production”. The main contribution of this work is reduction of time and money needed for production in order for the company to effectively increase the production rate, aiming at doubling the production and turnover in 2020.

Direct Cyclopalladation of Fluorinated Benzyl Amines by Pd3(OAc)6 : The Coexistence of Multinuclear PdnReaction Pathways Highlights the Importance of Pd Speciation in C-H Bond Activation

Palladacycles are key intermediates in catalytic C-H bond functionalization reactions and important precatalysts for cross-couplings. It is commonly believed that palladacycle formation occurs through the reaction of a substrate bearing a C-H bond ortho to a suitable metal-directing group for interaction with, typically, mononuclear "Pd(OAc)2"species, with cyclopalladation liberating acetic acid as the side product. In this study, we show that N,N-dimethyl-fluoro-benzyl amines, which can be cyclopalladated either ortho or para to fluorine affording two regioisomeric products, can occur by a direct reaction of Pd3(OAc)6, proceeding via higher-order cyclopalladated intermediates. Regioselectivity is altered subtly depending on the ratio of substrate:Pd3(OAc)6 and the solvent used. Our findings are important when considering mechanisms of Pd-mediated reactions involving the intermediacy of palladacycles, of particular relevance in catalytic C-H bond functionalization chemistry

Application of Carbon–Flax Hybrid Composite in High Performance Electric Personal Watercraft

Within the herein presented research, we studied the applicability of flax fabrics for composite parts in personal watercrafts in order to enhance damping of vibrations from the engine and noise reduction (which is relatively high for contemporary carbon constructions). Since the composite parts are intended to be exposed to humid environments requiring high levels of mechanical properties, a carbon–flax composite was selected. Samples of carbon, fiberglass, flax, and hybrid carbon–flax twill and biax fabrics were subjected to tensile and three-point bending tests. The mechanical properties were also tested after exposure of the samples to a humid environment. Damping was assessed by vibration and noise measurements directly on the complete float for samples as well as real parts. The hybrid carbon–flax material exhibited lower values of tensile strength than the carbon material (760 MPa compared to 463 MPa), but, at the same time, significantly higher than the other tested materials, or flax itself (115 MPa for a twill fabric). A similar trend in the results was observed for the three-point bending tests. Vibration tests and noise measurements showed reductions in vibration amplitude and frequency when using the carbon–flax hybrid material; the frequency response function for the watercraft part assembled from the hybrid material was 50% lower than for that made of carbon. Testing of samples located in a humid environment showed the necessity of surface treatment to prevent moisture absorption (mechanical properties were reduced at minimum by 28%). The tests confirmed that the hybrid material is satisfactory in terms of strength and its contribution to noise and vibration damping

Change in Dimensions and Surface Roughness of 42CrMo4 Steel after Nitridation in Plasma and Gas

The influence of plasma nitriding and gas nitriding processes on the change of surface roughness and dimensional accuracy of 42CrMo4 steel was investigated in this paper. Both processes almost always led to changes in the surface texture. After plasma nitriding, clusters of nitride ions were formed on the surface of steel, while gas nitriding very often led to the new creation of a formation of a “plate-like” surface texture. In both cases of these processes, a compound layer in specific thickness was formed, although the parameters of the processes were chosen with the aim of suppressing it. After the optimizing of nitriding parameters during nitriding processes, it was found that there were no changes in the surface roughness evaluated using the Ra parameter. However, it turned out that when using a multi-parameter evaluation of roughness (the parameters Rz, Rsk and Rku were used), there were presented some changes in roughness due to nitriding processes, which affect the functional behavior of the components. Roughness changes were also detected by evaluating surface roughness profiles, where nitriding led to changes in peak heights and valley depths. Nitriding processes further led to changes in dimensions in the form of an increase of 0.032 mm on average. However, the magnitude of the change has some context on chemical composition of material. A larger increase in dimensions was found with gas nitriding. The change in the degree of IT accuracy is closely related to the change in dimension. For both processes, there was a change of one degree of IT accuracy compared to the ground part (from IT8 to IT9). On the basis of the achieved dimensional accuracy results, a coefficient of change in the degree of accuracy IT was created, which can be used to predict changes in the dimensional accuracy of ground surfaces after nitriding processes in degrees of accuracy IT3–IT10. In this study, a tool for predicting changes in degrees of accuracy of ground parts after nitriding processes is presented

Investigation of molecular and mesoscale clusters in undersaturated glycine aqueous solutions

YesIn this work DLS, NTA, SAXS and NMR were used to investigate populations, size distributions and structure of clusters in undersaturated aqueous solutions of glycine. Molecular and colloidal scale (mesoscale) clusters with radii around 0.3-0.5 nm and 100–150 nm, respectively, were observed using complementary experimental techniques. Molecular clusters are consistent with hydrated glycine dimers present in equilibrium with glycine monomers in aqueous solutions. Mesoscale clusters previously observed in supersaturated glycine solutions appear to be indefinitely stable, in mutual equilibrium within mesostructured undersaturated solutions across all glycine concentrations investigated here, down to as low as 1 mg/g of water.Supported by EPSRC funding via the SynBIM project (Grant Reference EP/P0068X/1) and by the Synchrotron SOLEIL