Technical Transactions. Iss. 6

Technical Transactions. Iss. 6

Type: Collection of magazine numbers
Release date

Collection items (16)


A multi-criteria appraisal of the selection of means of urban passenger transport using the Electre and AHP methods

Dudek, Mariusz, Solecka, Katarzyna, Richter, Matthias
Article
2018
This article presents the main components of the multi-criteria decision making (MCDM) methodology and their application in the assessment of several public transportation solutions in a specific traffic corridor. The corridor in question is 15 km long and runs through the centre of Wrocław, Poland. The analysis focused on six alternative scenarios. The following elements were taken into consideration in their design: alternative means of land transport; different types of vehicles and priorities for public transportation; location of bus and tram stops. The individual solutions were assessed based on six criteria designed to measure different aspects of the problem with the use of two alternative MCDM methods: Electre III/IV and AHP. Computational experiments established the final ranking of transport solutions in the corridor from best to worst in terms of the analysed criteria.

Technical Transactions. Iss. 6

Number of the magazine
2018

Control of the vibration structure induced during works with the use of explosives

Sołtys, Anna, Pyra, Józef, Twardosz, Michał
Article
2018
This article presents the results of research on controlling the structure of vibrations induced during the firing of explosives with the use of non-electrical and electronic systems and the influence of the vibration structure during a transition from the ground to the building. The use of procedures associated with the selection of millisecond delay for firing explosive charges during blasting allows to get the excitation of favourable structure vibrations, thanks to a strong damping which is obtained at the transition from the ground to the structure. This means that optimally designed blasting works do not have to limit the mass of the explosives in the borehole as well as their number.

Estimation of the localisation and geometric parameters of the semi-solid zone of steel samples

Dębiński, Tomasz
Article
2018
This paper presents the use of computer graphics methods for the initial estimation of the shape, position and volume of the semi-solid zone in samples from the Gleeble 3800 physical simulator. Simulations were performed for the verification of the heating and deformation process of steel with a semi-solid zone. The numerical model consists of three separate subsystems for describing the deformation of the solid and semi-solid zones: mechanical, thermal and predictive densities. Taking into consideration the specific localisation of these zones, the initial estimation of the location of the melting zone is very helpful in understanding the process and may be the starting point for further research. This article describes the technique of selecting areas in samples that meet the thermal criteria. This allows us to approximate the location and shape of the semi-solid zone and this information can be used at a later stage to further refine its parameters.

Relationship between the absolute error and parameter values of voltage output accelerometer

Tomczyk, Krzysztof, Sieja, Marek
Article
2018
The functional relationship between the absolute error and the parameter values of a voltage output accelerometer is presented in this paper. The theoretical basis for the mathematical model of the accelerometer and its standard, which is a reference for the error determination, is discussed. The polynomial function is applied for error approximation. Optimal orders of the polynomial along with their parameters and associated uncertainties are determined. The results presented in this paper concern the maximum errors obtained by exciting the accelerometer by the signal of constrained magnitude.

Mode choice modelling for urban areas

Birr, Krystian
Article
2018
This article addresses the issue of mode choice modelling using a four-stage travel modelling process. The article indicates limitations of the currently used simplified methods of mode choice modelling and proposes the use of a more detailed approach that accounts for additional, statistically significant factors with the use of advanced mathematical tools and discrete choice models. A need has also been identified to include qualitative factors in forecasting the modal split and in the scenario analyses.

A simulation study of the graphical user interface of the head-up display and its influence on the driver’s perception

Skórska, Halszka, Sładek, Jerzy
Article
2018
This article presents the results of a simulation study of an augmented reality system and its influence on the user’s perception and reaction time. An automotive head-up display was chosen to conduct this research. It was assumed that the configuration of the GUI influences the perception and response time of the user of the augmented reality system. The perception of the driver was tested by using an eye-tracking device with accompanying software. The optimal graphical user interface (GUI) was developed as a result of the research.

Principles of architectural and landscape design of water areas

Ruban, Liudmyla
Article
2018
Nowadays, the paradigm of coexistence with the planet’s aquatic environment is changing due to the impact of many factors, among which climate change plays a principal role. The importance and necessity of finding new rules for the coexistence of water and humans on the planet is a reality of our time. The Paper justifies the necessity of considering Water areas as an object of urban planning and landscape design. There are three main ideas that uncover the meaning of the subject according to the principles of designing Water areas: considering them as habitat environments, investigation of changes in the lives of the current generation in accordance with the necessity to adapt to climate change, studying a nation’s memory in a historical retrospective and in the process of searching for historical national identity. The study considers water depending on its physical state.

The application of a simulation method in the evaluation of the reliability of transport systems

Kaczor, Grzegorz, Szkoda, Maciej
Article
2018
Reliability is the one of the key features that determine the probability of the proper functioning of a transport system. It refers to the degree to which the transported load is delivered on time, according to the client’s requirements. However, taking into account the complex relationships between the components of the transport system requires the application of appropriate methods of calculation. The paper presents the application of a method of reliability assessment, based on the Dynamic Fault Tree (DFT) and Monte Carlo (MC) simulation. The investigated approach may be used for the identification of weak components of the transport system and may form the basis for the improvement of reliability.

In search of a healthy balance on the example of the New District of Seestadt Aspern in Vienna

Poklewski-Koziełł, Damian
Article
2018
The aim of the article is to present one of the largest city expansion projects in Europe; it is currently being carried out on the north-eastern edge of Vienna and is known by the name Seestadt Aspern. Its design by the Swedish design office Tovatt Architects and Planners AB, which was selected through a competition in 2005, is characterized by an extraordinary wealth and variation of paved and green public spaces, as well as water bodies of varying accessibility which have been designed in such a manner as to create a system of safe and traffic-free walkable pathways and urban squares. The article will present a classification of the varied typology of the aforementioned spaces both in reference to urban plans, as well as to already built fragments of the city.