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Found 6278 publications

Hierarchical fuzzy system construction applying genetic and bacterial programming algorithms with expression tree building restrictions

No authors available

Publication Name: 2010 World Automation Congress, WAC 2010

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: Unknown

Description:

In this paper various restrictions are proposed in the construction of hierarchical fuzzy rule bases by using Genetic and Bacterial Programming algorithms in order to model black box systems defined by input-output pairs, i.e. to solve supervised machine learning problems. The properties (learning speed, accuracy) of the established systems are observed based on simulation results and they are compared to each other. © 2010 TSI Press.

Open Access: No

DOI: DOI not available

Context recognition in mobile robots cooperation using fuzzy signature

No authors available

Publication Name: International Conference on Theoretical and Mathematical Foundations of Computer Science 2010, TMFCS 2010

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: 110-115

Description:

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.

Open Access: No

DOI: DOI not available

On the measurement and evaluation of bass enhanced in-ear phones

No authors available

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: 4

Issue:

Page Range: 2849-2854

Description:

Measurements of the transfer function of headphones and earphones are made on dummy-heads or on ear simulators. This paper introduces measurement problems of newly designed in-ear phones, often called as micro-driver equipment. These earphones have smaller transducer diameter and are equipped with rubber or spongy material to fit in the ear canal. This coupling may create an increased sound isolation, less sound pressure and a better low frequency transmission to the eardrum. The paper presents subjective evaluation of listeners who evaluated five different kinds of in-ear phones as well as transfer function measurements using a dummy-head. Measurement problems are highlighted pointing on new aspects of a revised dummy-head standard. Copyright © (2010) by the International Congress on Acoustics.

Open Access: No

DOI: DOI not available

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

No authors available

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:

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: No

DOI: DOI not available

Representations of HRTFs using MATLAB: 2D and 3D plots of accurate dummy-head measurements

No authors available

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: 2

Issue:

Page Range: 1058-1066

Description:

Human Head-Related Transfer Functions describe the transmission from the free-field to the eardrums. HRTFs are measured on human subjects or on dummy-heads, characterized by the angle of incidence. The dummy-head measurement method allows the acquisition of data in high spatial resolution. Our setup provided HRTF data in 1 degree horizontal and 5 degrees elevational steps in different environmental settings. Spectral evaluation in spatial hearing research requires proper representation methods of detailed measurement data. Different 2D and 3D representation methods will be presented here, using different coordinate systems, color maps and additional filtering methods programmed under MATLAB. Figures are mainly helpful for HRTF analysis but MATLAB features allow other use for applications where directional characteristics, polar plots are required. Copyright© (2010) by the International Congress on Acoustics.

Open Access: No

DOI: DOI not available

Experimental and numerical investigation of internally reinforced damaged pipelines

No authors available

Publication Name: 18th European Conference on Fracture: Fracture of Materials and Structures from Micro to Macro Scale

Publication Date: 2010-12-01

Volume:

Issue:

Page Range: Unknown

Description:

The purpose of the paper is to present the role of the internal reinforcing on the structural integrity of steel pipes, based on numerical and experimental investigations. For FE analysis of unreinforced case three mechanical models were applied: multilayered elastic shell, 3D elastic solid and 3D elastic-plastic solid FE models. The aim of the numerical analysis was to clarify deformations, stresses and strains in the surrounding area of defects both in the steel pipe and on the composite reinforcement. A further task is to determine numerically the width of reinforcement and the number of layers needed for the repair. For experimental investiga-Tions internal reinforcement was developed using glass fibre polymer matrix composite. Fa-Tigue and burst tests were performed on pipe sections containing artificial metal loss defects. Both unreinforced and reinforced pipeline sections were examined. The applicability of the hybrid structure was demonstrated by means of the numerical and the experimental results.

Open Access: No

DOI: DOI not available

Auditory representations of a graphical user interface for a better human-computer interaction

György Wersényi

Publication Name: Lecture Notes in Computer Science Including Subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics

Publication Date: 2010-12-01

Volume: 5954 LNCS

Issue: Unknown

Page Range: 80-102

Description:

As part of a project to improve human computer interaction mostly for blind users, a survey with 50 blind and 100 sighted users included a questionnaire about their user habits during everyday use of personal computers. Based on their answers, the most important functions and applications were selected and results of the two groups were compared. Special user habits and needs of blind users are described. The second part of the investigation included collecting of auditory representations (auditory icons, spearcons etc.), mapping with visual information and evaluation with the target groups. Furthermore, a new design method for auditory events and class was introduced, called "auditory emoticons". These use non-verbal human voice samples to represent additional emotional content. Blind and sighted users evaluated different auditory representations for the selected events, including spearcons for different languages. Auditory icons using environmental, familiar sounds as well emoticons are received very well, whilst spearcons seem to be redundant except menu navigation for blind users. © 2010 Springer-Verlag Berlin Heidelberg.

Open Access: Yes

DOI: 10.1007/978-3-642-12439-6_5

Critical and ameliorating thoughts on consumer protection concerning product liability

Akos Kohidi

Publication Name: Acta Juridica Hungarica

Publication Date: 2010-12-01

Volume: 51

Issue: 4

Page Range: 305-316

Description:

In this paper the rules of product liability (the strict liability for defective products) will be discussed. Albeit the EU orders of this liability form were established more than twenty years ago, it is worth to explore that again, because new vital questions have arisen and arise nowadays, furthermore relevant essays were published on it, which emphasize the economic relations as well. The author has the intention to collect the most significant critical thoughts contrasting these with English and German studies, outline the problematic issues, loopholes, and experiences. Beyond the EEC Directive, the implemented rules in the acts of member states shall be cited and compared simultaneously.

Open Access: Yes

DOI: 10.1556/AJur.51.2010.4.5

On wavelet based modeling of radio frequency circuits, parts and electromagnetic fiels

András Fehér Szilvia Nagy

Publication Name: 2010 11th International Workshop on Symbolic and Numerical Methods Modeling and Applications to Circuit Design Sm2acd 2010

Publication Date: 2010-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Multiresolution or wavelet analysis is widely used in advanced data compression algorithms, and some approaches applied this technique in describing electromagnetic fields. The main goal of the application of MRA is its flexibility, i.e., since the details of the electromagnetic field are not distributed equally over different parts of the system, thus locally different resolution level can be applied. Wavelet based adaptive solution possibilities of differential equations of electromagnetic field are investigated in the followings. The adaptivity of the method means in this case, that the refinement level of the solution can be increased locally, if the accuracy needs it, during the calculations. ©2010 IEEE.

Open Access: Yes

DOI: 10.1109/SM2ACD.2010.5672288