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Found 6289 publications

Application of design tools in carbody construction harmonizing shape and dynamical load

Timea Fülep Péter Harth

Publication Name: Proceedings of the Mini Conference on Vehicle System Dynamics Identification and Anomalies

Publication Date: 2012-01-01

Volume: 2012-November

Issue: Unknown

Page Range: 379-386

Description:

There are two main areas highlighted in the paper concerning car body manufacturing: construction and design work or in other words functionality and aesthetics. The question is to be answered: Which is more important? The solution is untying this quasi contradiction, but it is not an easy task. The ergonomical and aesthetical demands are not unambiguous; they depend also on weather conditions, different anthropometrics, changeable conditions during operation, attitudes, traditions, mentalities, local and actual trends etc. Nowadays the external and internal design does not belong to the main constructor or automotive engineer. The major original equipment manufacturers (OEM) charge special designers to do such work similarly to the separated engine, axles, brake system, electric network design. Nevertheless there are many details that must fit together in the vehicle. As long as the different engineering interests can be harmonized in a rational way, in aesthetical and design questions tastes can be decisive beside rationality. This makes the decisions difficult. The GIST of the cooperation is that future automotive engineers must know the designer's way of thinking at least the main stream in order to consider and make good decisions.

Open Access: Yes

DOI: DOI not available

The sociodemographic obstacles to participating in lifelong learning across Europe

Péter Róbert

Publication Name: Lifelong Learning in Europe Equity and Efficiency in the Balance

Publication Date: 2012-01-01

Volume: Unknown

Issue: Unknown

Page Range: 87-102

Description:

No description provided

Open Access: Yes

DOI: DOI not available

Domain-decomposition based H1/2 seminorm preconditioners for frictional contact problems

Lotfi Abdelhakim

Publication Name: Civil Comp Proceedings

Publication Date: 2012-01-01

Volume: 100

Issue: Unknown

Page Range: Unknown

Description:

The bilateral or unilateral contact problem with Coulomb friction between two elastic bodies is considered [1, 12]. An algorithm is introduced to solve the resulting finite element system using a non-overlapping domain decomposition method. This technique enables the transformation of the solution of the global problem to the solution of the elasticity equations for each body separately and the solution of a smaller problem for the contact surface. The solution is obtained by using a successive approximation method, in each step of this algorithm two intermediate problems are solved, the first with prescribed tangential pressure, and the second with prescribed normal pressure[11]. © Civil-Comp Press, 2012.

Open Access: Yes

DOI: DOI not available

Exploiting the functional training approach in B-splines

Pedro M. Ferreira Cristiano L. Cabrita António E. Ruano László T. Kóczy

Publication Name: IFAC Proceedings Volumes IFAC Papersonline

Publication Date: 2012-01-01

Volume: 45

Issue: 4

Page Range: 127-132

Description:

When used for function approximation purposes, neural networks belong to a class of models whose parameters can be separated into linear and nonlinear, according to their influence in the model output. This concept of parameter separability can also be applied when the training problem is formulated as the minimization of the integral of the (functional) squared error, over the input domain. Using this approach, the computation of the gradient involves terms that are dependent only on the model and the input domain, and terms which are the projection of the target function on the basis functions and on their derivatives with respect to the nonlinear parameters, over the input domain. These later terms can be numerically computed with the data. The use of the functional approach is introduced here for B-splines. An example shows that, besides great computational complexity savings, this approach obtains better results than the standard, discrete technique, as the performance surface employed is more similar to the one obtained with the function underlying the data. In some cases, as shown in the example, a complete analytical solution can be found. © 2012 IFAC.

Open Access: Yes

DOI: 10.3182/20120403-3-DE-3010.00070

Formation control of quadrotor helicopters with guaranteed collision avoidance via safe path

Gergely Regula Bela Lantos

Publication Name: Periodica Polytechnica Electrical Engineering and Computer Science

Publication Date: 2012-01-01

Volume: 56

Issue: 4

Page Range: 113-124

Description:

In this article we propose a hierarchical control structure for multi-agent systems. The main objective is to perform formation change manoeuvres, with guaranteed safe distance between each two vehicles throughout the whole mission. The key components that ensure safety are a robust control algorithm that is capable of stabilising the group of vehicles in a desired formation and a higher level path generation method that provides safe paths for all the vehicles, based on graph theoretic considerations. The method can effciently handle a large group of any type of vehicles. In the article we focus on the control of quadrotor UAVs, thus the results are illustrated in 4D on a group of such vehicles.

Open Access: Yes

DOI: 10.3311/PPee.7080

Identity and soccer in Corsica

Róbert Győri Szabó

Publication Name: Soccer and Society

Publication Date: 2012-01-01

Volume: 13

Issue: 1

Page Range: 36-55

Description:

For decades Corsica could be characterized as an underdeveloped, politically unstable region ridden with violence. The 'Corsican Question' is a complex phenomenon, created over time as a result of political conflict, social tension and economic maladies. Despite the establishment of administrative autonomy in 1991 and a slow transformation within the French state, coupled with new efforts for institutional reform in order to develop and strengthen Corsica's political autonomy, a successful resolution of conflict in Corsica still remains quite illusory. The most popular sport in the world could be a weapon in the hands of national or ethnic minorities against the majority nation living on the island and against the state ruled by that nation. The Corsican example points up the important connection between football, politics and the question of nations and nationalities across the world. The essay examines how soccer has been used by the Corsican minority as a field of social protest, a stage for demonstrating distinctive identity. Local football is a mirror which reflects the various unresolved questions of the difficult and complex Corsican situation - Corsican identity, relations between the island and the French state, and so on. While Corsican football and the two major Corsican clubs might not ever achieve fame or a strong position in Europe, football will remain one of the most important expressions of Corsican national identity. © 2012 Copyright Taylor and Francis Group, LLC.

Open Access: Yes

DOI: 10.1080/14660970.2012.627166

Perceived quality of life as sustainable development facet

Ida Ercsey

Publication Name: Journal of Security and Sustainability Issues

Publication Date: 2012-01-01

Volume: 2

Issue: 2

Page Range: 19-30

Description:

The objective of this article is to explore how roles the perceived value of the cultural activities in the evaluation of the consumers' quality of life. First, we study the perceived value comparing two main approaches to the conceptualization of the perceived value. Next, we look over the quality of life studies in the cultural industry. We carried out a qualitative study among adult consumers in a Hungarian Region. Based on our results we explored the main components of the quality of life by subjective evaluation. We found that functional expression appears clearly against the emotional ones in the evaluation of the perceived value related to the cultural activities.

Open Access: Yes

DOI: 10.9770/jssi.2012.2.2(2)

Development of nanoclay reinforced HDPE/PA6 nanocomposites

Tamás Ibriksz H. Hargitai

Publication Name: Eccm 2012 Composites at Venice Proceedings of the 15th European Conference on Composite Materials

Publication Date: 2012-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

In our experiments HDPE/PA6 blends (75/25 wt%) were produced and maleic anhydride grafted polyethylene (PEgMA) was used as chemical coupling agent. To enhance the mechanical properties the blends were compounded with the layered structure montmorillonite (MMT) in different concentrations. The effect of PEgMA, MMT and their combination on the mechanical and melting properties were examined in this study.

Open Access: Yes

DOI: DOI not available

Development of production logistics system based on lean principles

Tamás Hartványi Csaba I. Hencz

Publication Name: International Conference on Industrial Logistics Icil 2012 Conference Proceedings

Publication Date: 2012-01-01

Volume: Unknown

Issue: Unknown

Page Range: 349-355

Description:

This paper acquaints the production logistics system about a Hungarian operating vehicle part manufacturing company, including its examination, and development opportunities. This paper's highlighted objectives are the preparation and analysis of the basic data of development recommendation. Moreover, it demonstrates lean based outsourcing strategies which could significantly reduce the company's handling demands.

Open Access: Yes

DOI: DOI not available