Prohlížení Acta Polytechnica. 2012, vol. 52 dle názvu
Zobrazují se záznamy 11-30 z 100
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A Thermogravimetric Study of the Behaviour of Biomass Blends During Combustion
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The ignition and combustion behavior of biomass and biomass blends under typical heating conditions were investigated. Thermogravimetric analyses were performed on stalk and woody biomass, alone and blended with various ... -
A Way to Use Waste Heat to Generate Thermoelectric Power
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In recent years there has been rising interest in thermoelectric generation as a potential source of electric power using waste heat. This paper describes thermoelectric power generation from waste heat from biomass boilers, ... -
Accelerometer-assisted PPG Measurement During Physical Exercise Using the LAVIMO Sensor System
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)A method is presented for long-term monitoring of vital signs tested during physical exercise. The system is based on reflective photoplethysmography (PPG), whose main component is a micro-optoelectronic sensor. The sensor ... -
Advanced Functions of a Modern Power Source for GMAW Welding of Steel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper evaluates the use of a modern welding power source equipped with advanced arc control functions. At the Laboratory of Welding Technologies of CTU in Prague we have focused on GMAW welding of steel using Sigma ... -
An Application of the Individual Channel Analysis and Design Approach to Control of a Two-input Two-output Coupled-tanks System
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Frequency-domain methods have provided an established approach to the analysis and design of single-loop feedback control systems in many application areas for many years. Individual Channel Analysis and Design (ICAD) is ... -
An Optimal Procedure for Determining the Height Parameters of Fracture Surfaces
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents an attempt to find an optimal procedure for determining the height parameters of fracture surfaces. This is a useful task that may significantly increase the reliability of topographic analyses of solids. ... -
Angular Distribution of GRBs
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)We studied the complete randomness of the angular distribution of BATSE gamma-ray bursts (GRBs). Based on their durations and peak fluxes, we divided the BATSE sample into 5 subsamples (short1, short2, intermediate, long1, ... -
Application of Induction Heating for Brazing Parts of Solar Collectors
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper reports on the application of induction heating for brazing parts of solar collectors made of Al alloys. The tube-flange joint is a part of the collecting pipe of a solar collector. The main task was to design ... -
Biomass Gasification — Primary Methods for Eliminating Tar
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This present paper deals with primary methods for reducing tar in biomass gasification, namely by feeding a natural catalyst into a fluidized bed. This method is verified using an experimental pilot plant. -
BOOTES Observation of GRB 080603B
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)We report on multicolor photometry of long GRB080603B afterglow from BOOTES-1B and BOOTES-2. The optical afterglow has already been reported to present a break in the optical lightcurve at 0.12 ± 0.2 days after the trigger. ... -
Change of Pressing Chamber Conicalness at Briquetting Process in Briquetting Machine Pressing Chamber
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)In this paper, we will present the impact of the conical shape of a pressing chamber, an important structural parameter. Besides the known impact of the technological parameters of pressing chambers, it is also very important ... -
Checking the Geometric Accuracy of a Machine Tool for Selected Geometric Parameters
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper deals with the control parameters for selected geometric accuracy measurements for a machine tool. The parameters were needed after a refurbished milling machine was purchased. After setting up the machine, it ... -
Concepts of Emission Reduction in Fluidized Bed Combustion of Biomass
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)A status report on fluidized bed technology in Austria is under preparation, in response to the Fluidized Bed Conversion multi-lateral technology initiative of the International Energy Agency. This status report focuses ... -
Contributions to the Study of Dynamic Absorbers, a Case Study
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Dynamic absorbers are used to reduce torsional vibrations. This paper studies the effect of a dynamic absorber attached to a mechanical system formed of three reduced masses which are acted on by one, two or three order x ... -
Control Algorithms for Large-scale Single-axis Photovoltaic Trackers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The electrical yield of large-scale photovoltaic power plants can be greatly improved by employing solar trackers. While fixed-tilt superstructures are stationary and immobile, trackers move the PV-module plane in order ... -
Creating a Multi-axis Machining Postprocessor
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper focuses on the postprocessor creation process. When using standard commercially available postprocessors it is often very difficult to modify its internal source code, and it is a very complex process, in many ... -
Design Process of Energy Effective Shredding Machines for Biomass Treatment
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)The shredding process has not been sufficiently investigated for the design of better, energy and material saving shredding machines. In connection with present-day concern about the environment, ecology, energy saving, ... -
Determination of Uncertainties for Correlated Input Quantities by the Monte Carlo Method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper presents the calculation of the uncertainty for distribution propagation by the Monte Carlo method for a measurement model with one output quantity. The procedure is shown on the basis of an example of the ... -
Development of an Ultralight with a Ducted Fan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)This paper introduces the UL-39 project, an ultralight aircraft with a ducted fan, and some of the problems that have arisen in the course of its development. Several problems with the design of a non-traditional aircraft ... -
Diamond Films for Implantable Electrodes
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2012)Diamond is a promising material for implantable electrodes due to its unique properties. The aim of this work is to investigate the growth of boron-doped nanocrystalline diamond (B-NCD) films by plasma-enhanced microwave ...