Behavior of Cars Produced Particulate Matter in Regional Model of Urban Canopy Layer
J. Pospisil* & M. Jicha
Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic,
* Corresponding author: pospisil.j@fme.vutbr.cz
ABSTRACT: This paper introduces utilizing of the CFD technique for modeling of PM10 (particulate matter 10 mm) behavior in urban areas, with focus on description of processes in the ground surface boundary layer. Description of deposition and re-suspension processes is introduced and applied on the regional numerical model of the city of Brno. The threshold velocity of re-suspension was obtained from the small scale modeling of PM10 dispersion in a street canyon located inside the regional model. Predicted concentration fields were compared with theoretical studies and an in-situ measurement.
KEY WORDS: particulate matter, numerical modeling, urban area.
Hybrid Solution of Interoperable European Toll Service
V. Jirovský, M. Svítek, P. Přibyl, P. Moos, Z. Votruba
Faculty of Transportation Sciences, Czech Technical University in Prague, Konviktská 20, 110 00 Prague 1, Czech Republic,
Corresponding authors :jirovsky@fd.cvut.cz, svitek@fd.cvut.cz
ABSTRACT: The paper summarizes the interoperability bottlenecks of EFC (Electronic Fee Collection) on the level of European electronic toll service and provides the proposals for new hybrid architecture that fulfils all European requirements, is compatible with current standards and enables to use all admissible technologies for toll data collection (GNSS, GSM/GPRS, DSRC) specified in EC Directives. The hybrid solution is discussed with respect to future development of Czech electronic toll system and also with respect to interoperability of our neighbor countries.
KEY WORDS: Electronic fee collection, electronic toll systems, electronic toll services, ITS, transport telematics, MISTER, EG9, EETS, RCI, interfaces.
The Modelling Processes Exploitation by Pavement Management System in Slovakia
M. Decký & M. Kováč* & J.Čelko
Department of Highway Engineering, University of Žilina, Žilina, Slovak Republic,
* Corresponding author: kovac@fstav.uniza.sk
ABSTRACT: The road evenness is one from basic factors of the pavement quality. It represents the characteristic of the road serviceability but also road safety and comfortable. The longitudinal unevenness causes the traffic discomfort and danger of the wheel-pavement interaction decreasing.
Listed aspects were taken into account for analyze of classification levels in frame of the Slovak Pavement Management Sysrem. The simulations of different boundary conditions during pavement surface diagnostics were oriented above all to the response of unevenness to the vehicle and to the ride comfort consequently. On the other hand an effect of unevenness to interaction between surface and wheel was the basic criteria of evaluation from safety point of view. The paper is oriented to the observation and evaluation described parameters during realized simulations and experimental measurements. For simulations were used dynamic characteristics of real vehicles.
KEY WORDS: Road serviceability, pavement, evenness, road safety, discomfort
Assessment of Morphology of Wear Particles in Oils for Vehicles
J. Machalíková, M. Sejkorová*, M. Livorová
Department of Transport Means and Diagnostics, Jan Perner Transport Faculty, Univerzity of Pardubice, Czech Republic
* Corresponding autor: marie.sejkorova @upce.cz
F. Krtička
Department of mechanics, materials and machine parts, Univerzity of Pardubice, Czech Republic
ABSTRACT: This paper presents the results of complex analysis of particles isolated from various kinds of oils (automobile engine and transmission oils, hydraulic and compressor oils) and oil filters. Morphological analysis was performed using analytical ferrography in combination with scanning electron microscopy, local electron microanalysis and image analysis. The results are a contribution to the quantitative assessment of processes connected with the wear of parts of vehicles and industrial machinery.
KEY WORDS: wear particles, oils, ferrography, scanning electron microscopy, image analysis
Information Power in Intelligent Transport Systems
P. Moos, M. Svítek, Z. Votruba
Faculty of Transportation Sciences, Czech Technical University in Prague, Konviktská 20, 110 00 Prague 1, Czech Republic,
Corresponding authors : moos@fd.cvut.cz, svitek@fd.cvut.cz, votruba@fd.cvut.cz
ABSTRACT: The decision making process in the environment of Intelligent transport system (ITS) with high level of uncertainty is strongly dependent on the level of conceptual and contextual knowledge. The effectiveness of decision making process of ITS relates to available information power (P) which is considered a vector in the plane given by the orthogonal system of information flow ( ) and information content (I). The paper introduces the information power as data, information and knowledge alliance. This approach enables us to measure the ITS effectiveness through information power and yields directly into optimal prognoses given by information power maximization, or by other words information resonance.
KEY WORDS: Information power, data, information, alliance, intelligent transport systems.
NDT of Reinforcement Corrosion Using Ultrasonic Spectroscopy
M. Kořenská* & M. Matysík
Department of Physics, Faculty of Civil Engineering, Brno University of Technology, Brno, Czech Republic
* Corresponding author: korenska.m@fce.vutbr.cz
K. Pospíšil
Transport Research Centre., Brno, Czech Republic
ABSTRACT: Corrosion of built-in steel reinforcement ranks among the most serious mechanisms of bridge structure degradation. There are many reasons for the corrosion to occur: failures occurring during the bridge construction, consequences of traffic load or, simple ageing of the structures. Visual inspection of a bridge provides general information on the bridge condition. However, it cannot provide any information on the internal structure and integrity of the reinforced concrete or pre-loaded elements of the bridge in question.
This is why non-destructive diagnostic methods are acquiring growing importance, helping the researchers to evaluate properly the condition of a bridge and decide upon the most convenient methods for maintenance, repair or refurbishment of the bridge in question or its parts and schedule them accordingly.
In this domain, methods employing the non-linear acoustic spectroscopy (NEWS – Nonlinear Elastic Wave Spectroscopy) achieved rush advancement recently. They are based on the fact that a non-linearity, which is due to the presence of a defect, makes an extraordinarily indicator of the structure damage. These new non-destructive methods appear to be promising for application to a wide range of materials featuring relatively heavy non-homogeneities, and for a large span of sites, from micro-chip to bridge structures.
The present paper deals with an experimental study of the application of non-linear ultrasonic spectroscopy methods to the detection of steel reinforcement corrosion and its consequences for reinforced concrete specimens subjected to corrosion induced degradation cycles.
KEY WORDS: Reinforced concrete, reinforcement corrosion, nonlinear ultrasonic spectroscopy, nonlinear effects.
Architecturing future-proof distribution of traffic and travel information using TPEG
J. Vlčinský*
eago systems, spol. s r. o., Ostrava, Czech Republic, jan.vlcinsky@cad-programs.com
ABSTRACT: The article summarizes key recommendations for creating traffic and travel information distribution architecture, which will function properly and without changes for longer time. Recommendations are based on work of proposing architecture for distributing traffic and travel information over digital radio broadcasting and Internet using TPEG formats and protocols. The whole process of architecturing is briefly described starting with planning scope, expected results and steps to get them; and process of requirement engineering. For requirements, list of user needs, created for intelligent transportation systems (ITS) by project KAREN, was found very useful. Lessons learned from existing traffic information distribution systems are also discussed as they were another source of requirements. Before describing the architecture, unique design concepts of TPEG itself are mentioned, namely possibility to seamlessly convert TPEG message from binary format to XML and back; promising location referencing methods incl. AGORA C; and ability to be backward compatible even after enhancing TPEG message to server for new or updated TPEG applications. All those TPEG design concepts allowed developing very modular and flexible architecture for distribution. Then, the architecture itself is briefly outlined by means of selected set of use cases, describing core functionality of reception and distribution; and by sample deployment model, depicting possible physical structure of future working system. Finally, based on created architecture, recommendations are stated. System must be designed as pure distribution channel, changes expected in future are identified, suitable requirement engineering methods are proposed and needs for monitoring and auditing tooling is highlighted. Open issue is practical availability of dynamic location referencing method which shall be evaluated in near future.
KEY WORDS: Architecture, TPEG, DAB, Internet, traffic and travel information.