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Found 6289 publications

Computer tomography based reconstruction of metal matrix syntactic foams

Ibolya Zsoldos Sz Papp István Kozma G. Dorogi

Publication Name: Periodica Polytechnica Mechanical Engineering

Publication Date: 2014-01-01

Volume: 58

Issue: 2

Page Range: 87-91

Description:

In order to create 3D (three-dimensional) models for finite element calculations it is necessary to reconstruct the structure of metal foam composites reinforced by hollow ceramic spheres. A new algorithm was developed for this reconstruction work. This algorithm is based on the investigation of sphericity of the shapes found on CT (computer tomograph) layer records. Using this algorithm a 3D CAD (computer aided design) model of acceptable precision can be constructed.

Open Access: Yes

DOI: 10.3311/PPme.7337

NFC applications in the tracking systems

No authors available

Publication Name: International Conference on Industrial Logistics, ICIL 2014 - Conference Proceedings

Publication Date: 2014-01-01

Volume:

Issue:

Page Range: 135-142

Description:

Radio Frequency Identification (RFID) and a Near Field Communication (NFC) is an automatic identification method, relying on storing and remotely retrieving data using devices different devices. An RFID tag and NFC devices is a small object that contains an antenna that enables it to receive and respond to radio-frequency. Basic requirements that these devices have to work in any conditions. In the working environment (closed or open air) there are always objects which can interact with radio frequency. This technical problem is to be considered when it comes to implementation of RFID or NFC devices knowing that materials can reflect, absorb or detune radio waves. In our paper we describe a system where NFC is applied. Many economic and technological questions arise by the implementation and usage. Copyright © FSB, Zagreb, Croatia, 2014.

Open Access: No

DOI: DOI not available

Analysis of the application of different production and material flow mechanisms on construction sites

Csaba Tápler

Publication Name: Proceedings 2014 International Conference on Computational Science and Computational Intelligence Csci 2014

Publication Date: 2014-01-01

Volume: 1

Issue: Unknown

Page Range: 241-246

Description:

This paper presents an analysis of the application of material flow control mechanisms at construction sites. Such control mechanisms are widely used in assembly plants to ensure the correct quantity of materials at the correct destination, to maximize the WIP and for various other essential purposes. However the advantages of material flow control mechanisms can be questionable among certain circumstances. I determined the key parameters which influence the success of a certain control mechanism - like kanban - at a construction site. I have built up a general case in which a given control mechanism is applicable. The tool of this analysis was a logistic simulation software. © 2014 IEEE.

Open Access: Yes

DOI: 10.1109/CSCI.2014.48

MILD HOME and EcoGreen village: An ecological and economical concept for sustainability

T. Horváth

Publication Name: Procedia Engineering

Publication Date: 2014-01-01

Volume: 85

Issue: Unknown

Page Range: 240-250

Description:

"MILD HOME and EcoGreen Village" is the title of a transnational project in South East Europe and a name of a concept, which aims to find a realistic middle way in the usage of sustainable architectural and technical tools for the residential buildings and areas. Eight architectural competitions were held to find the suitable solutions for different sites in different countries. This paper presents the most interesting entries. The awarded designs offer a great variety of solutions for the sites from the society model to the applied materials. Discussions in this topic can help us in the creation of our sustainable future.

Open Access: Yes

DOI: 10.1016/j.proeng.2014.10.549

Dynamic Preisach model identification applying FEM and measured BH curve

Miklós Kuczmann

Publication Name: COMPEL the International Journal for Computation and Mathematics in Electrical and Electronic Engineering

Publication Date: 2014-01-01

Volume: 33

Issue: 6

Page Range: 2043-2052

Description:

Purpose - The purpose of this paper is to develop a viscous-type frequency dependent scalar Preisach hysteresis model and to identify the model using measured data and nonlinear numerical field analysis. The hysteresis model must be fast and well applicable in electromagnetic field simulations. Design/methodology/approach - Iron parts of electrical machines are made of non-oriented isotropic ferromagnetic materials. The finite element method (FEM) is usually applied in the numerical field analysis and design of this equipment. The scalar Preisach hysteresis model has been implemented for the simulation of static and dynamic magnetic effects inside the ferromagnetic parts of different electrical equipment. Findings - The comparison between measured and simulated data using a toroidal core shows a good agreement. A modified nonlinear version of TEAM Problem No. 30.a is also shown to test the hysteresis model in the FEM procedure. Originality/value - The dynamic model is an extension of the static one; an extra magnetic field intensity term is added to the output of the static inverse model. This is a viscosity-type dynamic model. The fixed-point method with stable scheme has been realized to take frequency dependent anomalous losses into account in FEM. This scheme can be used efficiently in the frame of any potential formulations of Maxwell's equations.

Open Access: Yes

DOI: 10.1108/COMPEL-11-2013-0368

Computational intelligence for gestural communication using emotional model

János Botzheim Bakhtiar Yusuf Toru Yamaguchi Naoyuki Kubota

Publication Name: Iwaciii 2013 3rd International Workshop on Advanced Computational Intelligence and Intelligent Informatics

Publication Date: 2014-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

When conducting natural communication in addition to perform verbal communication, non-verbal communication such as gestural information should also be understood. By the word "understand" we mean not only the recognition of one action, but also grasp the meaning of the gesture itself. Therefore, in order to understand the meaning of an action, in this paper we propose emotional model along with the gesture recognition technique. First we discuss the gesture recognition method using iPhone camera by applying steady state genetic algorithm, spiking neural network and self organizing map. After that we use the gesture recognition result as an input data for the emotional model.

Open Access: Yes

DOI: DOI not available

Applications of signatures to expert systems modelling

Claudiu Radu Pozna Radu Emil Precup

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2014-01-01

Volume: 11

Issue: 2

Page Range: 21-39

Description:

This paper offers a new approach that applies the signatures to expert systems modelling. Signatures and their operators, viewed as a generalization of fuzzy signatures, represent a convenient framework for the symbolic representation of data. The models are derived by a three-step algorithm that maps the signatures onto expert systems. An expert systems modelling algorithm is given. Our algorithm has two inputs, the knowledge base, i.e., the rules, and the data base, i.e., the facts, and it constructs the signatures which represent models of expert systems. The algorithm is advantageous because of its systematic and general formulation allowing for the modelling of uncertain expert systems. The theoretical results are exemplified by a case study which produces models of a Bayesian expert system with mechatronics applications.

Open Access: Yes

DOI: DOI not available

A regularized method of fundamental solutions for 3D and axisymmetric potential problems

Csaba Gáspár

Publication Name: CMES Computer Modeling in Engineering and Sciences

Publication Date: 2014-01-01

Volume: 101

Issue: 6

Page Range: 365-386

Description:

The Method of Fundamental Solutions (MFS) is investigated for 3D potential problem in the case when the source points are located along the boundary of the domain of the original problem and coincide with the collocation points. This generates singularities at the boundary collocation points, which are eliminated in different ways. The (weak) singularities due to the singularity of the fundamental solution at the origin are eliminated by using approximate but continuous fundamental solution instead of the original one (regularization). The (stronger) singularities due to the singularity of the normal derivatives of the fundamental solution are eliminated by solving special auxiliary subproblems (desingularization). The desingularization idea is similar to a previously published technique and is completely independent of the applied regularization technique. The presented method produces well-conditioned or moderately ill-conditioned matrices in the resulting linear system of algebraic equations, while the accuracy remains acceptable. No boundary mesh structure is needed. The method is generalized to 3D axisymmetric potential problems in a natural way, despite in this case the fundamental solution does not remain a radial function. The use of extremely ill-conditioned matrices is still avoided.

Open Access: Yes

DOI: DOI not available

The business behaviour of representatives of small-and medium-sized enterprises in cross-cultural interaction situations

Julia Szoke

Publication Name: Tarsadalomkutatas

Publication Date: 2014-01-01

Volume: 32

Issue: 2

Page Range: 162-175

Description:

In the present paper based on the database of our own research from 2012 we examine with the help of some dimensions of national culture how the business behaviour of representatives of small-and medium-sized enterprises (henceforth SMEs) can be characterised in cross-cultural interaction situations. Previous pieces of research (e.g. Hofstede 1980, Bartlett-Ghoshal 1990) have already verifi ed that the norms, habits and behaviour patterns learnt as part of national culture strongly influence the behaviour of the members of the society therefore the business behaviour of employees as well, however, according to our hypothesis the business behaviour of representatives of SMEs is not unifi ed in cross-cultural interaction situations but can be subdivided into different categories. One novelty of our paper is that our research was concentrated on a geographical area since the sample included only representatives of Hungarian SMEs from the three counties of West-Transdanubian region with the condition that they participate in cross-cultural business relations with Austrian partner. The other novelty of the research is that the business behaviour of the respondent representatives was analysed by using some national culture dimensions of three researchers (Hofstede 1980, Trompenaars 1995, Hall 1975 and 1990), but based on the fi ndings the culture dimensions of a fourth researcher, Gesteland (2005) were outlined from the data. In our paper we fi rst introduce the theoretical background of the research, then we draw up its methodology, and fi nally as a result of our research we present the business behaviour of the representatives of SMEs from the examined region in cross-cultural interaction situations and its characteristics.

Open Access: Yes

DOI: 10.1556/Tarskut.32.2014.2.5