Prohlížení Acta Polytechnica. 2017, vol. 57 dle názvu
Zobrazují se záznamy 11-30 z 56
-
DEFORMATION RESPONSE OF GELLAN GUM BASED BONE SCAFFOLD SUBJECTED TO UNIAXIAL QUASI-STATIC LOADING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This study is focuses on an investigation of the reinforcement effect of the bioactive glass nano-particles in the gellan gum (GG) scaffolds used in bone tissue engineering. The investigated material was synthesized as the ... -
DESIGN AND CONSTRUCTION OF A PROTOTYPE SOLAR UPDRAFT CHIMNEY IN ASWAN/EGYPT
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This work is part of a joint project funded by the Science and Technology Development Fund (STDF) of the Arab republic of Egypt and the Federal Ministry of Education and Research (BMBF) of the Federal Republic of Germany. ... -
DESIGN OF PARTICULATE MATERIAL COMPACTOR ROLLS DIAMETER
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)At present, in a period of an industrial expansion great emphasis is placed on the environment. That means aiming for a reduced energy consumption, and also lessening dustiness from very fine powder material. This category ... -
DETERMINATION OF WATER CONTENT IN PYROLYTIC TARS USING COULOMETRIC KARL-FISHER TITRATION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The liquid organic fraction of pyrolytic tar has a high energy value which makes possible its utilization as an energy source. However, before utilization, it is crucial to remove water from the liquid fraction. The presence ... -
ELECTRICAL AND THERMODYNAMIC PROPERTIES OF A COLLAGEN SOLUTION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This paper focuses on measurements of the electrical properties, the specific heat capacity and the thermal conductivity of a collagen solution (7.19% mass fraction of native bovine collagen in water). The results of our ... -
EVALUATION OF THE APPLICATION OF A THERMAL INSULATION SYSTEM: IN-SITU COMPARISSON OF SEASONAL AND DAILY CLIMATIC FLUCTUATIONS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The current outdated state of many institutional and administrative buildings in the EU region poses a significant burden from the energy sustainability point of view. According to the contemporary EU requirements on the ... -
EXPERIMENTAL DETERMINATION OF TEMPERATURES IN SPARK GENERATED BUBBLES OSCILLATING IN WATER
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The surface temperatures of the plasma core in the final stages of the first contraction phase of spark-generated bubbles oscillating under ordinary laboratory conditions in a large expanse of water are determined ... -
FICTITIOUS DOMAIN METHOD FOR NUMERICAL SIMULATION OF INCOMPRESSIBLE VISCOUS FLOW AROUND RIGID BODIES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This article describes the method of efficient simulation of the flow around potentially many rigid obstacles. The finite element implementation is based on the incompressible Navier-Stokes equations using structured, ... -
FUNCTIONAL REALIZATIONS OF LIE ALGEBRAS AS NOETHER POINT SYMMETRIES OF SYSTEMS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Functional realizations of Lie algebras are applied to the problem of determining Lie and Noether point symmetries of Lagrangian systems in N dimensions, particularly in the plane. This encompasses both the case of ... -
FURTHER GENERALISATIONS OF THE KUMMER-SCHWARZ EQUATION: ALGEBRAIC AND SINGULARITY PROPERTIES
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The Kummer–Schwarz Equation, 2y'y'''− 3(y'')2 = 0, has a generalisation, (n − 1)y(n−2)y(n) − ny(n−1)2 = 0, which shares many properties with the parent form in terms of symmetry and singularity. All equations of the class ... -
GENERATION OF TRANSPORT PATHS IN FRACTURED POROUS MEDIA
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)In this article, a method for generation of transport paths in combined equivalent porous media / discrete fracture network computational meshes is proposed as an alternative to a particle tracking method. It is based on ... -
HEAT TRANSFER ENHANCEMENT AND PRESSURE DROP OF GROOVED ANNULUS OF DOUBLE PIPE HEAT EXCHANGER
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This investigation was performed to experimentally investigate the enhancement of heat transfer and the friction of an annulus in a double pipe heat exchanger system with rectangular grooves in the turbulent flow regime. ... -
HEIGHT AND WIDTH PARAMETERS FOR ENSURING PASSAGE OF EXCESSIVE LOADS ON ROADS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The article deals with the problem of passage of excessive transports on the roads and ensuring the necessary height and width parameters for this transport in the Czech Republic. Currently is lack of regulations for the ... -
HIGHLY ACCURATE CALCULATION OF THE REAL AND COMPLEX EIGENVALUES OF ONE-DIMENSIONAL ANHARMONIC OSCILLATORS
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)We draw attention on the fact that the Riccati-Padé method developed some time ago enables the accurate calculation of bound-state eigenvalues as well as of resonances embedded either in the continuum or in the discrete ... -
IMPLEMENTATION OF 3D VOF TRACKING ALGORITHM BASED ON BINARY SPACE-PARTITIONING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The paper focuses on modelling free surface flow. The interface is modelled using the Volume-Of-Fluid method, where the advection of volume fractions is treated by a purely geometrical method. The novelty of the work lies ... -
IMPROVEMENT OF ENERGY CONSUMPTION IN SPECTRUM SENSING COGNITIVE RADIO NETWORKS USING AN EFFICIENT TWO STAGE SENSING METHOD
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Cognitive radio (CR) is a wireless technology developed to improve the usage in the spectrum frequency. Energy consumption is considered as a big problem in this technology, especially during a spectrum sensing. In this ... -
JET ENGINE INLET DISTORTION SCREEN AND DESCRIPTOR EVALUATION
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Total pressure distortion is one of the three basic flow distortions (total pressure, total temperature and swirl distortion) that might appear at the inlet of a gas turbine engine (GTE) during operation. Different numerical ... -
LAMBERT FUNCTION METHODs TO STUDY LASER DYNAMICS WITH TIME-DELAYED FEEDBACK
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Time-delayed differential equations arise frequently in the study of nonlinear dynamics of lasers with optical feedback and because the analytical solution of such equations can be intractable, one resorts to numerical ... -
LIE ALGEBRA REPRESENTATIONS AND RIGGED HILBERT SPACES: THE SO(2) CASE
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)It is well known that related with the irreducible representations of the Lie group SO(2) we find a discrete basis as well a continuous one. In this paper we revisited this situation under the light of Rigged Hilbert ... -
MODIFICATION OF POWDER MATERIAL BY COMPACTION PROCESSING
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)There are different criteria for assessing the appropriateness of an agglomeration technology in the deployment processing of dry, fine and dirty dust burdening in the communal and working environment. Besides the benefit ...