The use of thermovision technology in output control of power supplies

Cílem práce je objasnění problematiky bezkontaktního měření povrchové teploty se zaměřením na termokamery jakožto moderní představitele pyrometrů a využití termovizní techniky při výstupní kontrole napájecího zdroje. Pro získání odpovídajících výsledků při kontrole teploty je nutná znalost přesných hodnot emisivity měřených materiálů. Zjišťováním emisivit součástí napájecího zdroje se zabývá experimentální část této práce.The aim of the thesis is to clarify the issue of non-contact surface temperature measurement with a focus on the thermal imaging cameras as a modern representative of pyrometers and thermovision technology used in the output control of power supply. To obtain the corresponding results of temperature control, it is necessary to know the exact values of emissivity of the measured materials. The experimental part of this thesis is focused on detection of emissivity of power supply parts.

Construction and manufacturing of chassis of radio-controlled car model using modern technology

Tato práce ukazuje na sestavě jednoduchých součástí princip jejich výroby pomocí moderních aditivních technologií. Návrh součástí se provádí pomocí CAD software SolidWorks. Výroba dílů byla následně realizována pomocí technologie Rapid Prototyping s využitím aditivní metody Fused Deposition Modeling. Součástí práce je i ucelený přehled v současné době nejpoužívanějších metod výroby v oblasti technologie Rapid Prototyping.The aim of the work is to show a principle of simple parts production through advanced additive technologies. Design of the parts is realised by CAD software SolidWorks. Manufacture of the parts was subsequently carried out by using Rapid Prototyping technology with using an additive method of Fused Deposition Modelling. The work also includes a comprehensive overview of the currently most popular production methods in Rapid Prototyping technology.

Recovery of logged forest fragments in a human-modified tropical landscape during the 2015-16 El Nino

The past 40 years in Southeast Asia have seen about 50% of lowland rainforests converted to oil palm and other plantations, and much of the remaining forest heavily logged. Little is known about how fragmentation influences recovery and whether climate change will hamper restoration. Here, we use repeat airborne LiDAR surveys spanning the hot and dry 2015-16 El Nino Southern Oscillation event to measure canopy height growth across 3,300ha of regenerating tropical forests spanning a logging intensity gradient in Malaysian Borneo. We show that the drought led to increased leaf shedding and branch fall. Short forest, regenerating after heavy logging, continued to grow despite higher evaporative demand, except when it was located close to oil palm plantations. Edge effects from the plantations extended over 300 metres into the forests. Forest growth on hilltops and slopes was particularly impacted by the combination of fragmentation and drought, but even riparian forests located within 40m of oil palm plantations lost canopy height during the drought. Our results suggest that small patches of logged forest within plantation landscapes will be slow to recover, particularly as ENSO events are becoming more frequent. It is unclear whether tropical forest fragments within plantation landscapes are resilient to drought. Here the authors analyse LiDAR and ground-based data from the 2015-16 El Nino event across a logging intensity gradient in Borneo. Although regenerating forests continued to grow, canopy height near oil palm plantations decreased, and a strong edge effect extended up to at least 300m away.Peer reviewe

Vitality assessment of Prague Energy Company, Inc..

The thesis is focused on application of methods of financial analysis, solvent and bankruptcy indicators and methods for assessing the vitality of the company by H. Pollak. These methods will be applied on the Prague Energy Company, Inc. This thesis aims to compare the resulting values and vitality assessment of Prague Energy Company, Inc

Defects and pests of wood

This bachelor thesis describes defects in wood and wood-decaying biological pests. For wood defects are explained causes of formation and their impact on the workability and usability of the material. The chapters on insects and wood-rotting fungi are mentioned the most important kinds of pests, their development in the wood, the level of damage and marginally possibilities of prevention or pest control. The text is accompanied by pictures. A two-part presentation serves for practical use in teaching at primary and secondary schools. The work also includes a collection of defects in wood and wood-boring insect grub holes

Finanční analýza společnosti STOCK Plzeň a.s.

Finanční analýza společnosti STOCK Plzeň a.s, skládá se z teoretické a praktické části, řešeny funkce a metody finanční analýzy, srovnáná s odvětvím. Cílem práce je komplexní posouzení finanční situace společnosti. Užito období let 2000 - 200

Finanční analýza společnosti STOCK Plzeň a.s.

Finanční analýza společnosti STOCK Plzeň a.s, skládá se z teoretické a praktické části, řešeny funkce a metody finanční analýzy, srovnáná s odvětvím. Cílem práce je komplexní posouzení finanční situace společnosti. Užito období let 2000 - 200

Vliv dračince rumělkového (Dracaena cinnabari) jako "nurse plant" na diverzitu cévnatých rostlin

Dracaena cinnabari, the dominant endemic tree of Socotra Island (Yemen), is in serious decline. The effect this will have on the island's plant diversity remains unknown. This dissertation aimed to assess the possible role of Dracaena as a nurse plant by identifying plants associated with Dracaena understorey and by assessing the importance of Dracaena for maintaining plant diversity. In the first part of the dissertation, relevés sampled in Dracaena understorey and in open sites to record the number of individuals of vascular plants were analysed. Species richness and composition were compared between understorey and open sites, and species associated with each of these habitats were identified. Additionally, the effects of shading and leaf litter on species richness and abundance were analysed. The second part of dissertation focused on mature woody species composition of Dracaena stands and investigated spatial relations between Dracaenas and other mature woody plants. The last part of the dissertation aimed to assess the fine scale spatial relationships between stones and plants in Dracaena stands and evaluated the differences of these relationships between understorey and open sites. The results confirmed the Dracaena role as an important nurse plant. The tree enhances the environmental heterogeneity and its presence creates two distinct microhabitats (understorey and open sites). The understorey habitat, compared with open site, harbours higher number of species, including endemics. The species in Dracaena stands can be classified as either understorey specialists, open-site specialists or generalists. The decline of Dracaena will negatively affect plant diversity, will reduce abundance of rare endemic plants and will lead to homogenization of vegetation. As no other tree species exists which could replace the Dracaena, our findings underline the importance of conservation efforts to preserve Dracaena stands on Socotra and identify this species as a key umbrella species whose conservation would ensure also the protection of a number of other associated species

Testing of wood with structure disturbed by defects and wood-destroying pests focusing on destructive tests of mechanical properties and wood protection

The theoretical part summarizes pieces of knowledge about the most common defects and wood pests including their impact on the properties of the material. The following practical part describes the destructive testing of wood - its course, calculation and evaluation of results. The final section is devoted to the structural and chemical wood protection. There are introduced basic principles and methods of protection and in the last chapter there are some examples of companies in our region that performs chemical protection