Search in Publications

Found 6278 publications

Comparison of railway track transition curves

Szabolcs Fischer

Publication Name: Pollack Periodica

Publication Date: 2009-12-01

Volume: 4

Issue: 3

Page Range: 99-110

Description:

There are no design parameters related to speeds exceeding 160 km/h in the effective Hungarian railway design rules. In the relevant international standard (ENV 13803) a similar speed limit is 300 km/h. This paper deals with the comparative of these regulations. Parameters of two transition curves used in Hungary and other used in Austria are determined. The importance of the new design parameters provided by ENV 13803 is assessed. It is demonstrated that the usability of the clothoide transition curves is unnecessarily restricted for the speeds v≤120 km/h in the Hungarian regulations. © 2009 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Pollack.4.2009.3.9

Comparative analysis of various evolutionary and memetic algorithms

János Botzheim Krisztián Balázs László T. Kóczy

Publication Name: 10th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics Cinti 2009

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 193-205

Description:

Optimization methods known from the literature include gradient techniques and evolutionary algorithms. The main idea of gradient methods is to calculate the gradient of the objective function at the actual point and then to step towards better values according to this value. Evolutionary algorithms imitate a simplified abstract model of evolution observed in nature. Memetic algorithms traditionally combine evolutionary and gradient techniques to exploit the advantages of both methods. Our current research aims to discover the properties, especially the efficiency (i.e. the speed of convergence) of particular evolutionary and memetic algorithms. For this purpose the techniques are compared by applying them on several numerical optimization benchmark functions and on fuzzy rule base identification.

Open Access: Yes

DOI: DOI not available

Potential formulations for solving TEAM problem 27

Miklós Kuczmann Zoltán Pólik

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 137-140

Description:

This paper presents a study of using two potential formulations-the A z.ast;-A formulation, and the T, Φ - Φ formulation-to solve the TEAM problem No. 27 (Eddy Current NDT and Deep Flaws). A procedure to determine arbitrary periodic excitation signal by using Fourier series will also be shown. The numerical results are compared with the experimental waveforms. The goal of this work is to find the more precise and the faster formulation and to approximate the response of a linear electromagnetic system, when the excitation is a periodic signal.

Open Access: Yes

DOI: DOI not available

Identification of dynamic hysteresis model

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 88-91

Description:

The paper presents a measurement system which can be used to prepare measured data to identify the Preisach hysteresis model. The identification is based on the Everett function. A fast and memory efficient realization of the model will be shown which is very useful in numerical field analysis techniques. The dynamic extension of the static model is based on the loss separation formula, and the measured excess magnetic field has been approximated by a feed-forward type neural network. The developed model has been inserted into a finite element procedure.

Open Access: Yes

DOI: DOI not available

Crisis, value, survival - Cross-reply to Kálmán Kulcsárs introduction: "modernization, regime change and the hungarian reality"

Károly Varga

Publication Name: Tarsadalomkutatas

Publication Date: 2009-12-01

Volume: 27

Issue: 4

Page Range: 401-422

Description:

The Editor-in-Chief of Társadalomkutatás starts the debate from one of the main topics of his research oeuvre, from modernisation as a 'dress rehearsal' of the scale of pilot study for the Delphi volume of discussions under preparation and to be edited by Kálmán Kulcsár and the present author. The first response to the paper is the present one, reversing the perspective of Professor Kulcsár's paper which is progressing in the history of concepts, and the author starts from the fact of the present global crisis and goes back in quest of elements that contain crisis potential right from the outset and can be grasped in the set of values of modernisation. Listing the relevant theses of several authors he presents evidence that besides the undoubtedly evolutionary achievements of modernisation some problematic factors as parasitic side-effects have been maturing in the value control of the process. Based on Hellemans he presents that in the face of the initial resistance of the institution of traditionally conservative values (such as the Roman Catholic Church) some basic values of modernisation would continue to show the direction, while he stresses of the discussion of modernisation between Daniel Bell and Habermas of the '70s that the forecast of disintegration implied in "consume hedonism" condemned by Bell proved to be more realistic than the perspective of the "project of modernisation" defended by Habermas. The current statements of the two authors already support this. In harmony with Bell's line Hofstede makes the fundamentally short-term orientation of the American set of values for the global crisis, contrasting it to the Chinese par excellence long-term one. Wallerstein's theory of centre and periphery also originates the present crisis from old contradictions, among others from the schizophrenic situation of the periphery which can only expect to enjoy the advantages of getting organically included in world economy only at the cost of the rapid amortisation of its human capital. The human capital model of Schulz may be linked to this, while it directs attention to the trend threatening survival in Hungary in view of domestic male mortality. It is at this point that my paper joins the conclusions of Professor Kulcsár's opening paper namely that the modernisation of the globalised world liveable by us as well is the adaptation of the society by its own conditions, together with the continuous improvement of those conditions. Thus following the warning of Domokos Kosáry we may avoid the present variant of dual mistake committed in the 20th century: namely disregarding the current space of mobility in global politics, and self-exposure to the 'favours' of great powers as well as of multinationals. © 2009, Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/Tarskut.27.2009.4.3

Analysis and design of electrical circuits by ANA method

Miklós Kuczmann Éva Katona

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 69-72

Description:

The paper presents a software, which includes the functions available in the other networks and systems, but it gives a user friendly interface. The program, called ANA (Advanced Network Analysis) is to give an easy use for students, engineers and researchers as well.

Open Access: Yes

DOI: DOI not available

Number archetypes, symbolic coding letters and "background communication theory" in Saint Stephen's royal mirror

Peter Varlaki József Bokor

Publication Name: Iccc 2009 IEEE 7th International Conference on Computational Cybernetics

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 201-211

Description:

Following Pauli's approach to the analysis of the Kepler's works, the paper attempts to identify patterns in the creative background cognitive processes related to a "background system and communication theory" in the thousand-year-old great Latin opus of St Stephen's Royal Mirror. Our paper is dedicated to the blessed memory of Prof. S. Csibi, the great scholar of communication theory, who creatively participated in this endeavour. ©2009IEEE.

Open Access: Yes

DOI: 10.1109/ICCCYB.2009.5393934

Robot cooperation without explicit communication by fuzzy signatures and decision trees

Tamás D. Gedeon Áron Ballagi László T. Kóczy

Publication Name: 2009 International Fuzzy Systems Association World Congress and 2009 European Society for Fuzzy Logic and Technology Conference Ifsa Eusflat 2009 Proceedings

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 1468-1473

Description:

This paper presents a novel action selection method for multi robot task sharing problem. Two autonomous mobile robots try to cooperate for push a box to a goal position. Both robots equipped with object and goal sensing, but do not have explicit communication ability. We explore the use of fuzzy signatures and decision making system to intention guessing and efficient action selection. Virtual reality simulation is used to build and test our proposed algorithm.

Open Access: Yes

DOI: DOI not available

Interprofessional education in Hungary: developments and challenges.

Krisztina Kóbor

Publication Name: Journal of Interprofessional Care

Publication Date: 2009-12-01

Volume: 23

Issue: 5

Page Range: 523-525

Description:

No description provided

Open Access: Yes

DOI: 10.1080/13561820902921951