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Found 6289 publications

Three level modelling of uncertainties in the condition assessment of buildings

Ádám Bukovics István Harmati L. T. Kóczy

Publication Name: Isciia 2016 7th International Symposium on Computational Intelligence and Industrial Applications

Publication Date: 2016-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Condition survey evaluation analyses (enginering-static expert reports) are often prepared about building structures (often focusing on load-bearing structures) in order to support appropriate maintenance and repair of the existing buildings. Based on these analyses modelling of the condition of buildings and building structures can be a big help to adopt decisions on intervention. In the course of our former research condition evaluation, decision support and ranking method was worked out which, based on a unified system of viewpoints, considering various priorities, is able to determine the condition of residential buildings. We have used tree-structure, fuzzy singleton signature based model, in which the expert specifies one discrete value for the condition of every examined building structure. In the course of our research it was experienced that the elaborated method is too subjective and uncertain, therefore the method is being further developed so that modelling of objective and subjective uncertainties become possible in the course of preparing expert opinions. Three levels were created to model uncertainties. Uncertainty on level 1 is how to transform verbal evaluations into fuzzy membership functions (verbal values cannot be unambiguously transformed into numerical values). In this model instead of membership values, which were used in the former model, we assign linguistic label modelling membership functions to the leaves of the structure. Level 2 we are modelling an uncertainty where even the expert is unable to precisely determine the condition of the examined structure. Often an interval is specified for the condition of the structure instead of a specific status value. It means that the condition of structure can have any value between two specified values with the same probability. To model it the triangular-shaped membership function is transformed into a trapezoidal-shaped membership function with the help of linguistic hedges. On level 3 it is modelled that the expert evaluation itself is not considered totally reliable. Subjectivity, professional preparedness of the expert, conducting the examination, or the quality of available circumstances and data may significantly influence the reliability of the final result. These uncertainties can be modelled by modifying the shapes of the membership function. The fuzzy set signature based model created by modelling the uncertainties at three levels is able to model with proper accuracy (more sophistically as compared to the former model) the condition of buildings, which were specified by verbal evaluation in expert opinion.

Open Access: Yes

DOI: DOI not available

Minkowski's inequality based sensitivity analysis of fuzzy signatures

Ádám Bukovics István Harmati L. T. Kóczy

Publication Name: Journal of Artificial Intelligence and Soft Computing Research

Publication Date: 2016-01-01

Volume: 6

Issue: 4

Page Range: 219-229

Description:

Fuzzy signatures were introduced as special tools to describe and handle complex systems without their detailed mathematical models. The input parameters of these systems naturally have uncertainties, due to human activities or lack of precise data. These uncertainties influence the final conclusion or decision about the system. In this paper we discuss the sensitivity of the weigthed general mean aggregation operator to the uncertainty of the input values, then we analyse the sensitivity of fuzzy signatures equipped with these aggregation operators. Finally, we apply our results to a fuzzy signature used in civil enginnering.

Open Access: Yes

DOI: 10.1515/jaiscr-2016-0016

Evaluation of response times on a touch screen using stereo panned speech command auditory feedback

Hunor Nagy György Wersényi

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

Publication Date: 2016-01-01

Volume: 9811 LNCS

Issue: Unknown

Page Range: 279-286

Description:

User interfaces to access mobile and handheld devices usually incorporate touch screens. Fast user responses are in general not critical, however, some applications require fast and accurate reactions from users. Errors and response times depend on many factors such as the user’s abilities, feedback types and latencies from the device, sizes of the buttons to press, etc. We conducted an experiment with 17 subjects to test response time and accuracy to different kinds of speech-based auditory stimuli over headphones. Speech signals were spatialized based on stereo amplitude panning. Results show significantly better response times for 3 directions than for 5, as well as for native language compared to English, and more accurate judgements based on the meaning of the speech sounds rather than their direction.

Open Access: Yes

DOI: 10.1007/978-3-319-43958-7_33

Bending stiffness measurement of wounded piano strings

P. Szalai P. Horváth

Publication Name: Proceedings of ISMA 2016 International Conference on Noise and Vibration Engineering and Usd2016 International Conference on Uncertainty in Structural Dynamics

Publication Date: 2016-01-01

Volume: Unknown

Issue: Unknown

Page Range: 2233-2240

Description:

Bass notes of pianos exhibit high degree of inharmonicity that means that frequencies of overtones depart from integer multiples of the fundamental frequency. Small amount of inharmonicity is tolerable for musicians and listeners, but higher ones cause unpleasant metallic tone. Reducing inharmonicity the first step is to investigate all influencing factors. This paper deals with effects of bending stiffness and nonuniform winding of wounded strings. As there is no reliable information in literature on bending stiffness data, a measuring procedure has been elaborated that is based on analysis of frequencies of overtones and the mathematical model of a vibrating string. Gained bending stiffness data opens the door to further quantitative investigations to reduce inharmonicity and improve sound generation methods of digital pianos.

Open Access: Yes

DOI: DOI not available

First names of female servants in a Józsefváros (Josefstadt) apartment building in the 19th-20th centuries

László Horváth

Publication Name: Nevtani Ertesito

Publication Date: 2016-01-01

Volume: Unknown

Issue: 38

Page Range: 79-84

Description:

The paper discusses the 19th-20th-century first names of female servants in an apartment building in Budapest compared to the female first names used by the families that employed them. Sources were register books listing the inhabitants of the building between 1899 and 1947. Female servants arrived to the capital from over 40% of the counties in the country at the time, while families employing them were mostly from Budapest. The most frequent first names in the register books coincide with the top 10 percent of first names in the country-wide statistics of the era. The assumption that mainly young unmarried female servants were listed in the register books by hypocoristic names has clearly not been justified. A comparison of the first names of the female servants and those of the female members of their employers' families displays the approximate similarity of the most frequent first names. Differences between the two name stocks can only be observed with respect to female servants' informal nicknames. The final conclusion of the paper is that first names borne exclusively by female servants did not exist.

Open Access: Yes

DOI: DOI not available

Real-time representation of the human spine with absolute orientation sensors

Claudiu Radu Pozna Csaba Antonya Silviu Butnariu

Publication Name: 2016 14th International Conference on Control Automation Robotics and Vision Icarcv 2016

Publication Date: 2016-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper presents a new algorithm for the real-time representation of a spine using a mobile device for recording and analyzing the human body posture. The measurements are based on inertial measuring units (IMU), which are providing the pitch angles of five points of a cord attached to the clothing (t-shirt or jacket). The algorithm developed for the real-time representation of the spine is based on quadratic Bézier curves defined in a reference frame attached to the first sensor from the head. The curve is obtained knowing the distances between the sensors and the measured pitch angles. The line of the spine is reconstructed with four segments of Bézier curves, meeting the requirement of continuity of the tangents. The obtained postures are compared with a normal one, identified by the medical specialist, by computing the average absolute distances between them. The recorded movement of the spine can be used for diagnosis purposes, and the real-time tracking for therapy by warning the user to correct his/her posture. The warning message is delivered with buzzers attached to the clothing by applying haptic stimuli on the back.

Open Access: Yes

DOI: 10.1109/ICARCV.2016.7838745

Reconstruction Italian style: Restoration of the san domenico church and monastery, forli, Italy by gabrio funari

András Veöreös

Publication Name: Metszet

Publication Date: 2016-01-01

Volume: 2016

Issue: 5

Page Range: 26-29

Description:

The most important part of restoring old buildings could be described as giving a new function to historical heritage sites. Contemporary construction techniques might need to be applied in such a way as to resist compromising the original building's integrity. This leads to a problem of historical faithfulness best explained by the simple fact that a contemporary rendering system will not adhere to older lime washed walls. Here the clash between original use and technologies has been the motivating factor behind restoration, not the creation of a stand alone architectural statement.

Open Access: Yes

DOI: DOI not available

On the sensitivity of the weighted relevance aggregation operator and its application to fuzzy signatures

István Harmati L. T. Kóczy

Publication Name: Communications in Computer and Information Science

Publication Date: 2016-01-01

Volume: 611

Issue: Unknown

Page Range: 798-808

Description:

The weighted relevance aggregation operator is a modified, flexible version of the general power mean. In this paper we discuss the sensitivity of this operator, namely we give bounds on the change of the output in terms of vector norms of the change of the input variables. We apply these results to characterize to sensitivity of fuzzy signatures which are equipped with these operators in its nodes.

Open Access: Yes

DOI: 10.1007/978-3-319-40581-0_65

Development of Safety Performance Functions for Two-Lane Rural First-Class Main Roads in Hungary

A. Borsos Gyula Orosz John N. Ivan

Publication Name: Traffic Safety Volume 4

Publication Date: 2016-01-01

Volume: 4

Issue: Unknown

Page Range: 87-100

Description:

This chapter describes a modeling effort to define accident prediction models for first-class main roads outside built-up areas in Hungary using variables that are available and believed to exert an influence on safety performance. Models are proposed using the Generalized Linear Modeling (GLM) approach assuming a negative binomial error structure. The chapter also overviews design characteristics and accident statistics of two-lane rural first-class main roads. Five variables are used to predict accident frequencies, Annual Average Daily Traffic (AADT), posted speed, curve, roadway width and shoulder width. Traffic volume is used as an exposure to accidents and the length of the homogenous sections. Safety Performance Functions (SPFs) have been widely used in the traffic safety field for analyzing how the safety performance of road facilities is related to various road characteristics. The chapter reviews literature to demonstrate problems associated with conventional regression techniques used for accident prediction.

Open Access: Yes

DOI: 10.1002/9781119307853.ch6