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Found 6374 publications

Parallelization of numerical examination of nonlinear systems using maple

No authors available

Publication Name: Civil-Comp Proceedings

Publication Date: 2017-01-01

Volume: 111

Issue:

Page Range: Unknown

Description:

In this work we present possibilities of the parallelization of numerical examination and simulation of nonlinear systems, especially creating phase-plane diagrams in parallel. For construction of such diagrams Maple was used because it provides algorithms for solving differential equations and two models for parallelization. These are the Task programming model and the Grid programming model. The paper describes the development, the test and the comparison of the parallel programs created according to the two parallelization models. Even using a simple desktop with low number of processors a relative good speedup with a good efficiency could be achieved in both cases. It was also examined how the problem size affects the speedup and the efficiency.

Open Access: No

DOI: DOI not available

Eugenic bacterial memetic algorithm for fuzzy road transport traveling salesman problem

János Botzheim Peter Foldesi Laszlo T. Koczy

Publication Name: International Journal of Innovative Computing Information and Control

Publication Date: 2011-05-01

Volume: 7

Issue: 5 B

Page Range: 2775-2798

Description:

The aim of the Traveling Salesman Problem (TSP) is to find the cheapest way of visiting all elements in a given set of cities (nodes) exactly once and returning to the starting point. In solutions presented in the literature costs of travel between nodes are based on Euclidean distances, the problem is symmetric and the costs are constant and crisp values. Practical application in road transportation and supply chains are often uncertain or fuzzy. The risk attitude depends on the features of the given operation. The model presented in this paper handles the fuzzy, time dependent nature of the TSP and also gives a solution for the asymmetric loss aversion by embedding the risk attitude into the fitness function of the eugenic bacterial memetic algorithm. Computational results are presented for different cases. The classical TSP is investigated along with a modified instance where some costs between the cities are described with fuzzy numbers. Two different techniques are proposed to evaluate the uncertainties in the fuzzy cost values. The time dependent version of the fuzzy TSP is also investigated and simulation experiences are presented. © 2011.

Open Access: Yes

DOI: DOI not available

ISO 14000 as a driver of sustainability: Exploring its alternative drivers beyond ISO 9000 standards

Santi Setyaningsih Heba F. Zaher

Publication Name: Journal of Infrastructure Policy and Development

Publication Date: 2024-01-01

Volume: 8

Issue: 12

Page Range: Unknown

Description:

This study replicates and extends Corbett and Kirsch (2001) and Vastag (2004) using a new data set to investigate the drivers of ISO 14000 certification diffusions using decision tree analysis. The findings indicate that at the national level, ISO 14000 certification diffusions are influenced by factors other than ISO 9000 certification diffusions, such as the number of environmental treaties signed and ratified, industrial activities as a percentage of GDP, and GDP per capita, thus provides a range of managerial insights and enhances scholarly understanding of sustainability beyond the influence of ISO 9000. Future studies might extend the countries included in this study to see if the results are the same. Future research may include other factors like a country’s Environmental, Social, and Governance (ESG) indicators to better understand its commitment to sustainability, including environmental sustainability. The country’s culture may influence customers, investors, and other stakeholders’ knowledge and desire for sustainable practices and inspire firms to obtain ISO 14000 certifications. Since larger firms may seek ISO 14000 certification, future studies may evaluate the influence of the number of large firms in various countries as drivers of ISO certification diffusions.

Open Access: Yes

DOI: 10.24294/jipd.v8i12.8161

Preface: Special issue: multimodal biases in CoglnfoCom networks

Peter Foldesi Anna Esposito Hassan Charaf Péter Baranyi Helen Meng

Publication Name: Journal on Multimodal User Interfaces

Publication Date: 2015-12-01

Volume: 9

Issue: 4

Page Range: 261-262

Description:

No description provided

Open Access: Yes

DOI: 10.1007/s12193-015-0201-8

Fabrication of waste bagasse fiber-reinforced epoxy composites: Study of physical, mechanical, and erosion properties

Amar Patnaik Gusztáv Fekete Sachin Tejyan Ibolya Zsoldos Vedant Singh Tej Singh

Publication Name: Polymer Composites

Publication Date: 2019-09-01

Volume: 40

Issue: 9

Page Range: 3777-3786

Description:

The aim of the research work is to study the physical, mechanical, and erosive wear properties of sugarcane bagasse fiber-reinforced epoxy composites. The physical (density, void content) and the mechanical (hardness, tensile strength, impact energy, flexural strength) properties of the composites were found to increase with the content of bagasse fiber. For erosive wear analysis, the experiments were carried out with the help of erosion test machine. To minimize the erosive wear rate, Taguchi technique is executed to explore the influence of five control factors including fiber content, impact velocity, impingement, stand-off distance, and erodent size at three levels. Using Taguchi (L27) orthogonal array, the optimal combination of control factors, which yielded minimum erosive wear rate, was statistically predicted and experimentally verified. The fiber content and impact velocity were the two most contributing control factors for the minimization of erosive wear rate. The important sequence of the parameters is fiber content > impact velocity > impingement angle > erodent size > stand-off distance. The optimal combination of control factors was obtained at 10 wt% of fiber content, 30 m/s of impact velocity, 30° of impingement angle, 85 mm of stand-off distance, and 250 μm of erodent size. Finally, composites worn surfaces were examined with scanning electron microscope to study the possible erosive wear mechanism. POLYM. COMPOS., 40:3777–3786, 2019. © 2019 Society of Plastics Engineers.

Open Access: Yes

DOI: 10.1002/pc.25239

How Perceptual Variables Influence the Behavioral Intention to Use Autonomous Vehicles †

Boglárka Eisingerné Balassa Dániel Csikor Réka Koteczki

Publication Name: Engineering Proceedings

Publication Date: 2024-01-01

Volume: 79

Issue: 1

Page Range: Unknown

Description:

The rapid development of technology makes the acceptance of autonomous vehicles (AVs) in modern transport a key issue. The aim of the present research was to explore the impact of AVs on behavioral intention to use. An online survey was conducted, in which factors such as perceived usefulness (PU), perceived ease of use (PEU), perceived trust (PT), social influence (SI), and behavioral intention to use (BIU) were investigated. As a result of the investigation, the correlation analysis revealed that there was a significant positive relationship between the intention and all the factors examined. The practical utility of this research is that the results will support developers and vehicle manufacturers in understanding how different social factors influence the adoption of AVs.

Open Access: Yes

DOI: 10.3390/engproc2024079023

Biostimulating effects of the cyanobacterium Nostoc piscinale on winter wheat in field experiments

Zoltán Molnár I. Gergely G. Takács Vince Ördög Wendy A. Stirk Johannes van Staden

Publication Name: South African Journal of Botany

Publication Date: 2019-11-01

Volume: 126

Issue: Unknown

Page Range: 99-106

Description:

Due to global warming, a permanent rainfall deficit and higher temperatures reduce the available water in the soil, which severely influences plant water status. Current research needs to address ways to overcome these problems in order to maintain crop yields. The beneficial effects of seaweed extracts against abiotic and biotic stress factors of plant growth is well known but the use of microalgae for the same purpose is not well described. The aim of the present work was to investigate the plant biostimulating effects of the cyanobacterium Nostoc piscinale on the winter wheat variety “Bőség.” Experiments were carried out over three years in Hungary at the Mosonmagyaróvár Faculty Farm. Freeze-dried cyanobacterium was re-suspended in water (0.3 or 1.0 g/L) and sprayed at 400 L/ha on wheat leaves at tillering or tillering and ear emergence. Root weight, relative water content (RWC), chlorophyll and proline content of leaves were measured during the vegetation period. Ear number, ear length, grain numbers in ear, thousand grain weight and yield were measured at harvest. The most economic and highest yield increase was obtained by 0.3 g/L treatment with N. piscinale at tillering and ear emergence. Beneficial effects included a stronger root system, elevated leaf RWC, higher proline content and increased leaf chlorophyll content, which remained high in plant leaves treated with N. piscinale for one or two weeks longer than in the control leaves. The high chlorophyll content extended the productive vegetation period of the treated plants. Cyanobacterium treatment increased the ear number, ear length, grain number per ear, thousand grain weight and yield of the wheat crop.

Open Access: Yes

DOI: 10.1016/j.sajb.2019.06.033

Virtual proximity in distance education - The usage of a three-dimensional software

Petra Kecskés Julia Szoke

Publication Name: 8th IEEE International Conference on Cognitive Infocommunications Coginfocom 2017 Proceedings

Publication Date: 2017-07-02

Volume: 2018-January

Issue: Unknown

Page Range: Unknown

Description:

From time to time new forms of communication appear in our everyday life due to the constant development of ICT. Therefore, we demonstrate how a three-dimensional visualization software can be used in higher education for students of distance education.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2017.8268291

Overall imperfection method for beam-columns

No authors available

Publication Name: Advances and Trends in Engineering Sciences and Technologies II - Proceedings of the 2nd International Conference on Engineering Sciences and Technologies, ESaT 2016

Publication Date: 2017-01-01

Volume:

Issue:

Page Range: 87-92

Description:

The principles and applications of the overall imperfection method for beamcolumns are presented in this paper. The buckling resistance of a beam-column member is determined by the resistance of its critical cross-section taking into account the second-order effect. The maximum amplitude of the initial imperfection, in the shape of elastic buckling mode, is determined from fundamental cases. Fundamental case: simply-supported member with uniform cross-section subjected to uniformly distributed forces. The standardized buck-ling resistance of this reference member is based on theoretical and empirical background. The proposed overall imperfection method is adequate for computer-aided design procedures which contains an advanced elastic beam-column finite element method. The accuracy of the overall imperfection method is shown by a parametric study.

Open Access: No

DOI: DOI not available