Prohlížení Acta Polytechnica CTU Proceedings. 2024 ( vol. 46-51) dle názvu
Zobrazují se záznamy 1-20 z 95
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A geometry projection method for designing and optimizing additively manufactured variable-stiffness composite laminates
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)A method for designing laminates is presented using geometry projection to optimize the layout of additively manufactured variable-stiffness composite laminates. By considering fiberreinforced bars as geometric primitives, ... -
A simplified design of a concrete sandwich structure containing a reinforcing rib
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This article presents the use of a strut and tie analogy for modelling the behaviour of a concrete sandwich structure, which is formed by thin outer concrete layers made of high-performance concrete and reinforcing ribs. ... -
About the choice of Tungsten carbide indenter to determine mechanical properties of superalloys by using high-temperature microhardness tester
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)In the aeronautical field, materials are used in severe environmental conditions (temperature, atmosphere), particularly in engine applications. In order to qualify mechanical properties of new composition Ni-based ... -
Ageing effects on the mechanical properties stability of 3D printed material under compression
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The paper deals with the examination of the ageing effects on the mechanical properties stability of 3D printed material via stereolithography under compression when subjected to various conditions, including UV radiation, ... -
AI-enabled transition to smart European cities
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Smart cities continue to be discussed throughout Europe as a result of the continent’s rising urbanization and the need for sustainable development. Artificial intelligence (AI) has the potential to significantly promote ... -
An examination of driving speed: the role of perceivable road characteristics in towns
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Understanding the subjective perspectives of drivers is paramount in evaluating the factors affecting driving speed in built-up areas. Building on our previous work, where a wide set of infrastructure attributes was analysed, ... -
Analysis of concrete taken from a loaded column by determining the modulus of elasticity
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Sustainability places an emphasis on preserving and using existing structures, particularly those that are historically or artistically valuable. The preservation of buildings is closely related to a good assessment of ... -
Analysis of the effect of hydration heat resulting in the formation of cracks on the experimental block of the spillway at Orlik reservoir
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This article concentrates on the numerical analysis of hydration heat resulting in formation of cracks on the experimental block of the spillway at Orlik Reservoir and its verification with the experimental measurement. ... -
Assessing time and financial costs of bus delays in the Ústí nad Labem Region, Czech Republic
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)This publication focuses on the development of a regional system for monitoring and evaluating public bus delays in the Ústí nad Labem Region in the Czech Republic.The case study, through a questionnaire survey, addresses ... -
Assessment of local mechanical properties of laser powder bed fused aluminium alloy by non-destructive testing based on FIMEC indentation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Laser powder bed fusion process is a versatile metal additive manufacturing process. Although significant progress has been made so far, there is still limited large-scale adoption of this technique by the industry. The ... -
Augmented emergency lighting as a soft early warning: measures on road users when moving over
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)A novel interface to provide robust, intuitive, and timely alerts to road users to move over for emergency vehicles (EVs) was tested in a seven-minute driving-simulator experiment. The interface, Augmented Emergency Lighting ... -
Automatic detection of sleep spindles by neural networks algorithms
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Sleep constitutes an essential aspect of human existence, with the average individual dedicating approximately one-third of their life to this physiological activity. Consequently, comprehending and accurately analyzing ... -
Autonomous driving with a focus on HMI for parallel parking maneuvers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Autonomous vehicles remain a major topic in the automotive industry today, including assistance systems, cooperative communication, and other aspects that lead to full vehicle autonomy. This paper investigates vehicle ... -
Cementitious material development for additive fabrication
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)For the 3D STAR project and 3D printing purposes, a special fine-grained cement mixture from locally available raw materials was developed. The reason for the development of the custom mixture was the possibility of arbitrary ... -
Changing the integrity of the material surface by combining laser surface texturing and PVD magnetron sputtering technologies
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The presented research combines laser micromachining technology (LST, Laser Surface Texturing) using an ultra-short femtosecond laser beam and PVD deposition of thin layers using magnetron sputtering. This combination has ... -
Characteristics of fibres based on secondary raw materials and their use in concrete technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Different types of fibres in cementitious composites, particularly in concrete, are currently used for a number of reasons. Fibres are being added to improve mechanical properties (especially steel and glass fibres), to ... -
Characterization of woven composite material under multiaxial loading regimes using FE-based stereocorrelation
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)In this paper, woven glass fiber composite samples were subjected to three different cyclic loading histories (i.e., tensile, shear and combined loading at 45° via the Modified Arcan Fixture. During the experiments, the ... -
Cities in transition: Krakow‘s social, economic and spatial transformation within the last thirty years (selected aspects)
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Krakow is a city that has undergone an immense transformation in recent years. At the end of the 1980s, the period of communism ended and Polish local governments began to operate based on the principles of subsidiarity, ... -
Comparison of Berkovich and spherical tip indentation for determining the Young’s modulus of polymer thin films encapsulated by a dielectric
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)Pixel integrated micro-lenses for CMOS image sensors consist of a stack of polymer acrylate resin films encapsulated by a dielectric layer. Due to the mismatch of thermomechanical properties, adhesive or cohesive fractures ... -
Comparison of elastic properties of periodic and aperiodic porous structures produced by additive methods
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2024)The aim of this work was to design, print, and examine elastic properties of porous structures with various parameters and beam distributions. These structures, generated using an algorithm, featured three types of lattices: ...