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Found 6278 publications

Optimization and finite element analysis of 3-pole magnetic bearing with nonlinear material

Miklós Kuczmann Daniel Marcsa

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2010-12-20

Volume: 86

Issue: 12

Page Range: 91-94

Description:

This paper deals with the design and numerical simulation of a radial active magnetic bearing. This bearing is a Y-shaped three-pole magnetic bearing fed by two amplifiers. The geometry design is based on the analytical computation and numerical optimization based on nonlinear finite element analysis. The nonlinearity has been handled by the Newton-Raphson method.

Open Access: Yes

DOI: DOI not available

Man-machine cooperation without explicit communication

Claudiu Pozna Áron Ballagi László T. Kóczy

Publication Name: 2010 World Automation Congress Wac 2010

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper presents a novel method for control cooperation between human and robots without any explicit communication line. We have proposed a fuzzy communication philosophy and implementation technique, where the code books are built up by fuzzy signatures. Fuzzy signatures are used as complex state description method for intention guessing and action selection. Robots cooperation means also to define the commune task. In order to understand their cooperation the robots must have complete knowledge about all possible states of the work or to understand the context by extract useful information from observation. Present paper focus on the second possibility. We propose a strategy of information extraction and context understanding based on an original data structure, the fuzzy signature and on a priori knowledge, the robot codebook. The paper starts by presenting the concept of the fuzzy signature and exemplify the idea of cooperation by context understanding. © 2010 TSI Press.

Open Access: Yes

DOI: DOI not available

Hungary

Klara Kerezsi Katalin Parti Csaba Gyory Orsolya Bolyky Eszter Sarik

Publication Name: Juvenile Delinquency in Europe and Beyond Results of the Second International Self Report Delinquency Study

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: 311-325

Description:

Hungary is situated in Eastern Europe, in the rolling plains of the Carpathian Basin. It covers an area of 93,000 km2, which is roughly equivalent to 1% of Europe's territory. There are 3,145 settlements, 289 of which are urban; their number increased by 123 in the last 15 years, and tripled over the past 25 years. Two-thirds of the country's inhabitants live in urban settlements. Hungary has been an EU member state since 2004. The population of Hungary was 10,077,000 on 1 January 2006 (male: 4.7 million; female: 5.3 million) (HCSO, p. 9). Hungary's population is aging; the total number of people in age cohorts above 60 exceeds the total number of 1-year old to14-year-olds by about half a million. On 1 April 2005, at the time of the micro census, the number of households was more than 4 million, 139 thousand higher compared to that in 2001. The total number of marriages is decreasing, consistently below the number registered in 2000. Slight increases may occur: in 2005, 44,100 couples got married, 0.7% more than the year before. Decrease remains the dominant trend, though. There was no significant change in the divorce rate: 24,700 marriages were dissolved in 2005, about the same as the year before. Since people get married later in life, divorces happen at a later age, too (HCSO, p. 9) © 2010 Springer-Verlag New York.

Open Access: Yes

DOI: 10.1007/978-0-387-95982-5_22

A diagnostic system created for evaluation and maintenance of building constructions

Attila Koppány

Publication Name: Web Based Engineering Education Critical Design and Effective Tools

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: 199-206

Description:

The successful diagnostic activity has an important role in the changes of the repair costs and the efficient elimination of the damages. The aim of the general building diagnostics is to determine the various visible or instrumentally observable alterations, to qualify the constructions from the suitability and personal safety (accidence) points of view. Our diagnostic system is primarily based on a visual examination on the spot, its method is suitable for the examination of almost all important structures and structure changes of the buildings. During the operation of the diagnostic system a large number of data-valuable for the professional practice-was collected and will be collected also in the future, the analysis of which data set is specially suitable for revaluing construction and the practical application of the experiences later during the building maintenance and reconstruction work. For using the system a so-called "morphological box" has been created, that contains the hierarchic system of constructions, which is connected with the construction components' thesaurus appointed by the correct structure codes of these constructions' place in the hierarchy. The thesaurus was not only necessary because of the easy surveillance of the system, but to exclude the usage of structure-name synonyms in the interest of unified handling. The analysis of which data set is specially suitable for revaluing earlier built constructions and can help to create knowledge based new constructions for the future. © 2010, IGI Global.

Open Access: Yes

DOI: 10.4018/978-1-61520-659-9.ch015

Fuzzy communication in collaboration of intelligent agents

Áron Ballagi László T. Kóczy

Publication Name: Proceedings of the 9th Wseas International Conference on Applied Computer and Applied Computational Science Acacos 10

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: 208-214

Description:

This paper presents some examples for fuzzy communication and intention guessing from the real life to the cooperation of intelligent mobile robots. In a special experimental environment a new communication approach is investigated for intelligent cooperation of autonomous mobile robots. Effective, fast and compact communication is one of the most important cornerstones of a high-end cooperating system. In this paper we propose a fuzzy communication system where the codebooks are built up by fuzzy signatures. We use cooperating autonomous mobile robots to solve some logistic problems.

Open Access: Yes

DOI: DOI not available

Overview and comparative results of speech-based excitation signals for virtual localization and real-life applications

György Wersényi

Publication Name: 20th International Congress on Acoustics 2010 Ica 2010 Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society

Publication Date: 2010-12-01

Volume: 5

Issue: Unknown

Page Range: 3885-3889

Description:

In virtual audio synthesis we use different excitation signals for listening tests. These tests are executed using headphone playback and real-time HRTF synthesis. Besides noise signals, speech is often used for tests especially for real life applications, such as mobile phones, various voice transmission lines, computer environments or accessories for the visually impaired, where speech intelligibility is important. This paper presents a summary of results of a listening test using different signals including speech in a virtual audio environment aimed at blind persons. Results show how speech contributes to the accessibility to computers and performs in a comparative test for virtual audio simulation. Furthermore, additional speech test signals are overviewed and introduced, such as speech-chorus signals, segmented spondees and the newly developed spearcons.

Open Access: Yes

DOI: DOI not available

Effect of topological defects on graphene geometry and stability

Ibolya Zsoldos

Publication Name: Nanotechnology Science and Applications

Publication Date: 2010-12-01

Volume: 3

Issue: 1

Page Range: 101-106

Description:

The effect of two basic topological defects, mitosis and the Stone-Wales defect, is studied in the graphene structure. The topological rules of the curvatures due to the occurrence of the defects in different arrangements are determined. Despite the fact that the causes and the probability of these topological defects are not known today, this theoretical work studies the distortions caused by the defects geometry and stability of the graphene structure. © 2010 Zsoldos, publisher and licensee Dove Medical Press Ltd.

Open Access: Yes

DOI: 10.2147/NSA.S13905

Performance of CFD codes on CPU/GPU clusters

Manfred Liebmann Zoltán Horváth

Publication Name: Aip Conference Proceedings

Publication Date: 2010-12-01

Volume: 1281

Issue: Unknown

Page Range: 1789-1792

Description:

The paper investigates the scalability of a parallel Euler solver, using the Vijayasundaram method, on CPU and GPU clusters. The aim of this research is to develop efficient parallel CFD codes on unstructured meshes. We present the relevant algorithms and some benchmark results, which show overall efficiency of the solver. © 2010 American Institute of Physics.

Open Access: Yes

DOI: 10.1063/1.3498230

Fuzzy signature based fuzzy communication of mobile robots

Claudiu Pozna Áron Ballagi László T. Kóczy

Publication Name: 2010 IEEE Rivf International Conference on Computing and Communication Technologies Research Innovation and Vision for the Future Rivf 2010

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper presents a novel method for control cooperating robots where the explicit communication line is substituted with fuzzy communication algorithms. Fuzzy signatures are used in a context dependent codebook, as complex state description method for intention guessing and action selection. Finally a possible cooperative robot application on a realistic example with missing data components will be shown. ©2010 IEEE.

Open Access: Yes

DOI: 10.1109/RIVF.2010.5633066