GAL Framework

GAL (GIS or GRASS? Abstraction Layer) Framework is meant to be multiplatform OpenSource library with certain tools and subsidiary daemons for easy implementation of distributed modules for GIS GRASS in static or dynamic programming languages. This article aims to present some ideas behind this library and bait a fresh meat for this project since its complexity needs more spread development team not just single person. Project homepage can be found at http://gal-framework.no-ip.org

GAL Framework – Current State of the Project

The GAL (GIS Abstraction Layer) Framework is a component-architecture-oriented1 remote procedure call (RPC) library with implementations of GIS-related subsystems communicating using the library and a set of demonstrational and testing tools utilizing that services. It doesn’t aim to be a full-featured solution for GIS application construction but a proposal for possible incremental GRASS GIS2 modernization. This article summarizes current state of the project, it’s history, application and potential and also presents options for further advancement and areas of possible participation. Only a concern of other developers or users and the time may transform this idea into something practically usable

Measurement of Small Complex Shapes

Import 05/08/2014Diplomová práce se zabývá možnostmi kontroly a vyhodnocení tvaru optického elementu na světlovodu určenému k dennímu svícení osobních automobilů. Kontrola a vyhodnocení je prováděno na měřících zařízeních, kterými společnost Hella Autotechnik s.r.o. již disponuje. Pomocí předem stanovených kriterií jsou tato měřící zařízení porovnávána a na základě získaných údajů je zvolen jako nejvhodnější přístroj pro kontrolu a vyhodnocení optického elementu skener Atos Core.The diploma thesis focuses on the options of checking and evaluation of shapes of optical elements at lightguide intended for daily lightening of passenger cars. The checking and the evaluation is being carried out on the measuring gauges that are used in the company Hella Autotechnik s.r.o. This measuring equipment is compared through in advance stated criteria and on the base of gained statements the scanner Atos Core is chosen as the most suitable equipment for necking and evaluation of optical element.346 - Katedra obrábění a montáževýborn

Machining accurate holes with required roughness

The knowledge gained from the theoretical and practical tests in the production of precise openings has been utilized in a wide range of technologies from simple machine parts to complex schemes requiring accurate placement of individual parts. The topic here deals with the production of precise holes of required roughness according to the customer's requirements, it is a sealing of hydraulic cubes with a ball plug. The article examines the possibilities of existing technology, proposes the possibilities of using other tools or changes in the machining parameters, all using one machine tool. All theoretical knowledge has been verified by practical tests with the use of measuring instruments such as hardness meters. All output measurements were recorded in tables and graphs for more clear results and used in practice.Web of Science20192974296

Emerging graphene derivatives as active 2D coordination platforms for single-atom catalysts

Single-atom catalysts (SACs) based on graphene derivatives are an emerging and growing class of materials functioning as two-dimensional (2D) metal-coordination scaffolds with intriguing properties. Recently, owing to the rich chemistry of fluorographene, new avenues have opened toward graphene derivatives with selective, spacer-free, and dense functionalization, acting as in-plane or out-of-plane metal coordination ligands. The particular structural features give rise to intriguing phenomena occurring between the coordinated metals and the graphene backbone. These include redox processes, charge transfer, emergence, and stabilization of rare or otherwise unstable metal valence states, as well as metal-support and metal-metal synergism. The vast potential of such systems has been demonstrated as enzyme mimics for cooperative mixed-valence SACs, ethanol fuel cells, and CO2 fixation; however, it is anticipated that their impact will further expand toward diverse fields, e.g., advanced organic transformations, electrochemical energy storage, and energy harvesting.Web of Science1437134991349

Coordination effects on the binding of late 3d single metal species to cyanographene

Anchoring single metal atoms on suitable substrates is a convenient route towards materials with unique electronic and magnetic properties exploitable in a wide range of applications including sensors, data storage, and single atom catalysis (SAC). Among a large portfolio of available substrates, carbon-based materials derived from graphene and its derivatives have received growing concern due to their high affinity to metals combined with biocompatibility, low toxicity, and accessibility. Cyanographene (GCN) as highly functionalized graphene containing homogeneously distributed nitrile groups perpendicular to the surface offers exceptionally favourable arrangement for anchoring metal atoms enabling efficient charge exchange between the metal and the substrate. However, the binding characteristics of metal species can be significantly affected by the coordination effects. Here we employed density functional theory (DFT) calculations to analyse the role of coordination in the binding of late 3d cations (Fe2+, Fe3+, Co2+, Ni2+, Cu2+, Cu+, and Zn2+) to GCN in aqueous solutions. The inspection of several plausible coordination types revealed the most favourable arrangements. Among the studied species, copper cations were found to be the most tightly bonded to GCN, which was also confirmed by the X-ray photoelectron spectroscopy (XPS), atomic absorption spectroscopy (AAS), and isothermal titration calorimetry (ITC) measurements. In general, the inclusion of coordination effects significantly reduced the binding affinities predicted by implicit solvation models. Clearly, to build-up reliable models of SAC architectures in the environments enabling the formation of a coordination sphere, such effects need to be properly taken into account.Web of Science25129628

Graphene nanobeacons with high-affinity pockets for combined, selective, and effective decontamination and reagentless detection of heavy metals

Access to clean water for drinking, sanitation, and irrigation is a major sustainable development goal of the United Nations. Thus, technologies for cleaning water and quality-monitoring must become widely accessible and of low-cost, while being effective, selective, sustainable, and eco-friendly. To meet this challenge, hetero-bifunctional nanographene fluorescent beacons with high-affinity pockets for heavy metals are developed, offering top-rated and selective adsorption for cadmium and lead, reaching 870 and 450 mg g(-1), respectively. The heterobifunctional and multidentate pockets also operate as selective gates for fluorescence signal regulation with sub-nanomolar sensitivity (0.1 and 0.2 nm for Pb2+ and Cd2+, respectively), due to binding affinities as low as those of antigen-antibody interactions. Importantly, the acid-proof nanographenes can be fully regenerated and reused. Their broad visible-light absorption offers an additional mode for water-quality monitoring based on ultra-low cost and user-friendly reagentless paper detection with the naked-eye at a limit of detection of 1 and 10 ppb for Pb2+ and Cd2+ ions, respectively. This work shows that photoactive nanomaterials, densely-functionalized with strong, yet selective ligands for targeted contaminants, can successfully combine features such as excellent adsorption, reusability, and sensing capabilities, in a way to extend the material's applicability, its life-cycle, and value-for-money.Web of Science1833art. no. 220100

Analysis ofelectrical output from the power plat working in the middle of town

Práce je zaměřena na vyvedení elektrického výkonu z elektrárny pracující v městské zástavbě. Po krátkém obecném rozboru možností vyvedení výkonů z různých typů elektráren navazuje rozbor vyvedení výkonu z PPC Červený Mlýn. Následně jsou vypočteny zkratové poměry v hlavní rozvodně elektrárny. Navazuje rozbor elektrických vedení. V poslední části je řešena problematika spolehlivosti zdroje v souvislosti s náhodnými přechodnými ději v elektrické síti a ohledem na provozní spolehlivost elektrických zařízení elektrárny.The work focuses on outlet of the electrical power from power plants operating in urban areas. After a short analysis of the general possibility of leading out electric power from power plants of various types, thesis continues to describe of outlet electrical power from PPC Červený Mlýn. Subsequently, are calculated short-circuit conditions in the main switching station. It follows an analysis of power lines. The last part dealt with the issue of reliability of sources in connection with random transition processes in the electrical network and the light of the operational reliability of electrical power equipment.

Design of HV disconnector

Práce je zaměřena na návrh odpojovače na vysoké napětí. Je proveden krátký teoretický rozbor stavebních směrnic přístroje. Navazuje návrh izolačního systému přístroje podle empirických vzorců. V dalším je rozebráno dimenzování proudové dráhy odpojovače. Pro proudovou dráhu jsou vypočteny působící elektrodynamické síly. Oteplení proudové dráhy je simulováno počítačovým programem ANSYS, tato simulace zahrnuje 3D model přístroje a určení materiálových a tepelných konstant. V poslední řadě je uveden výpočet potřebného momentu na hřídeli odpojovače. Tento výpočet je zjednodušen. Výstupem jest náčrt přístroje a 3D model použitý pro simulaci oteplení.The text focuses on the design of high-voltage disconnector. It made a brief theoretical analysis of construction equipment directives. Proposal follows the insulation system apparatus according to empirical formulas. Hereafter, we discuss the design of current track isolators. For the flow path are calculated electrodynamic forces acting. Warming current path is simulated by a computer program ANSYS, this simulation includes 3D device model and determine the material and thermal constants. Finally it is shown calculating the required torque on the shaft of the disconnector. This calculation is simplified. The output is a 3D sketch of the device model used to simulate warming.

Measuring of Complicated Shape Surfaces

Předložená disertační práce se zabývá měřením vybraných lineárních a geometrických rozměrů na dílech vyrobených dvěma různými způsoby pomocí technologie rapid prototyping. Hlavním cílem práce je porovnání možností nasnímání požadovaných elementů pro následnou inspekci daných rozměrových charakteristik a posouzení jejich výsledných hodnot. Na základě naměřených hodnot analyzovat příčiny rozdílných výsledků. Práce je rozdělená do několika kapitol. Po úvodní kapitole jsou definované cíle disertační práce. V první části je obsáhlý přehled současného stavu hodnocení délkové a geometrické přesnosti při použití kontaktní a bezkontaktní metody měření. V podkapitolách jsou popsány jednotlivá měřicí zařízení. Dále jsou popsány metody měření jednotlivých elementů, strategie měření a souřadné systémy. Jednou z podkapitol je i hodnocení chyb měření a nejistoty měření. Další dvě kapitoly se věnují výhradně experimentální činnosti, které komplexně zahrnují oblast hodnocení lineární a geometrické přesnosti. Jsou zde publikované výsledky měření průměru kružnice, vzdálenosti dvou bodů, rovinnosti a kolmosti, které byly nasnímány na zařízeních jako souřadnicový měřicí stroj, optické skenery a počítačový tomograf. Předmětem experimentálních měření je zkoumání rozdílnosti výsledných hodnot získaných pomocí různých měřicích objemů u optických skenerů a v různých vzdálenostech dílu od zdroje záření u počítačového tomografu, vůči referenčním hodnotám získaných ze souřadnicového měřicího stroje. Na závěr jsou uvedené získané výsledky a přínosy pro vědní obor Strojírenská technologie a praxi. Výsledky budou dále publikované a budou sloužit pro další výzkum v této oblasti.This dissertation thesis deals with the measurement of selected linear and geometric dimensions on parts manufactured in two different ways using rapid prototyping. The main objective is to compare the possibilities of scanning the required elements for subsequent inspection of the given dimensional characteristics and to assess their resulting values. The thesis is divided into several chapters. After the introductory chapter, the objectives of the thesis that I want to achieve are defined. In the first part, a comprehensive review of the current state of the art of length assessment is and geometric accuracy using contact and non-contact measurement methods. In the subchapters the individual measuring devices are described. In addition, the measurement methods for individual elements, measurement strategies and coordinate systems are described. One of the subchapters is the evaluation of measurement errors and measurement uncertainty. The next two chapters are devoted exclusively to experimental activities that comprehensively cover the area of linear and geometric accuracy evaluation. The results of measurements of circle diameter, distance between two points, flatness and perpendicularity, which were taken on equipment such as a coordinate measuring machine, optical scanners and a computer tomograph, are published. The object of the experimental measurements is to investigate the differences in the resulting values obtained with different measuring volumes in optical scanners and at different distances of the part from the X-ray source in the case of a computed tomography scanner, with respect to reference values obtained from a coordinate measuring machine. Finally, the results obtained and the contributions to the discipline of Mechanical Engineering Technology and practice are presented. The results will be further published and will be used for further research in this field.346 - Katedra obrábění, montáže a strojírenské metrologievyhově