Transactions on Transport Sciences, 2008 (vol. 1), issue 1

Decision processes in Communications Multi-path Access Systems applied within ITS

M. Svitek, T. Zelinka

Transactions on Transport Sciences 2008, 1(1):3-12 | DOI: 10.5507/tots.2008.001

The paper presents multi-path communications access systems decision processes applied within ITS (Intelligent Transport System). A competent decision process based on precisely quantified system requirements using a performance indicators tolerance range represents a critical part of the ITS access communications system. The goal of the described process is to keep the communications service continuously available with no influence on changing conditions in time and served space. Either the family of CALM standards based system or the specifically designed and configured L3/L2 switching represent relevant a solution for such a multi-path access communication...

Scanning Electron Microscopy Method as a Tool for the Evaluation of Selected Materials Microstructure

K. Pospíšil, A. Frýbort, A. Kratochvíl, J. Macháčková

Transactions on Transport Sciences 2008, 1(1):13-20 | DOI: 10.5507/tots.2008.002

This paper introduces CDV's research on microstructure evaluation of two selected materials used in pavements or structures, i.e. cement concrete and bitumen. A Scanning Electron Microscope (SEM) has been used as the main equipment. In the case of cement concrete time-dependent changes in the microstructure of self-compacting concrete (SSC) are described. The microstructures and differences in void and pore system of matured SSC with commonly used micro-fillers are also shown here. In the case of bitumen the paper anticipates that the relationship between the composition, structure and usable properties of bitumen have not yet been clarified enough....

Noise and Vibration Reduction - the Cranktrain as a Main Powertrain Module

P. Novotný, V. Píštěk

Transactions on Transport Sciences 2008, 1(1):21-28 | DOI: 10.5507/tots.2008.003

This paper discusses how the multi-body dynamics approach combined with flexible body effects is being applied to predict the vibrations of crankshaft, bearing loads or cranktrain noise level due to structural flexibility. The oil film effects in the journal bearing are implemented with the use of a finite difference method. An application example of a Diesel inline four-cylinder engine is given in this paper to show this sophisticated simulation model and to predict the dynamic response of the flexible system and loads in the journal bearings.

Architecture of Tools and Processes for Affordable Vehicles

J. Stodola, P. Stodola

Transactions on Transport Sciences 2008, 1(1):29-36 | DOI: 10.5507/tots.2008.004

The focus of this paper is on the description of the recommended functional requirements for the software architecture that enables the integration of tools and processes for large scale affordable vehicles and propulsion systems. These include: integration, processes, tools, affordability, repeatability, sustainability, integrity, etc. Prior to the discussion of the recommended functional requirements a brief description is given on the two types of integration environments (Monolithic Environments and Best Class Environments) along with a categorization of the different type of tools considered to be integrated within the environment. The four categories...

Statistical Analysis of the Impact of Selected Factors on the Rate of Accidents

R. Budský, M. Koucký$*

Transactions on Transport Sciences 2008, 1(1):37-42 | DOI: 10.5507/tots.2008.005

The main purpose of this statistical analysis was to find objective relationships between the indicators of traffic accidents in selected European countries and the factors which are no doubt important for the safety of road traffic, for example, general prevention of accidents and the relevant requirements of the road traffic regulations, training and examination of new drivers, the post-examination period, sanction system, technical parameters of roads and vehicles, and, last but not least, the influence of important social climates. In the assessment of the results, the index of corruption perception was also considered, which has proven an important...

Integration of logistic systems into regional transport services using road cargo transport

V. Cempírek, A. Seidlová, J. Široký, P. Nachtigall, R. Kampf

Transactions on Transport Sciences 2008, 1(1):43-48 | DOI: 10.5507/tots.2008.006

The paper deals in the analytic part with problems of taxes and charges paid by users of road transport. Our team found that those payments are lower than for railroad transport, so that toll system implementation can't incite movement of transport from road to railroad. New partnerships between road and railroad companies can be set up here. This will lead to intermodal systems with savings on tolls, namely domestically, but in international transport. The proposal part of intermodal system deals with systems like Mobiler and Cargo Domino or Modalohr and Cargo Beamer. The conclusion is a better regional service technology and costs savings thanks...

Technical Notes on GDF, GEOGRAPHIC DATA FILES Information support for the visually impaired Project R&D MD

J. Plíhal, M. Pípa, P. Roček

Transactions on Transport Sciences 2008, 1(1):49-50 | DOI: 10.5507/tots.2008.007