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On-board diagnostic-based positioning as an additional information source of driver assistant systems

Istvan Lakatos Gergő Pálfi Tibor Busznyák

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2019-01-01

Volume: 16

Issue: 5

Page Range: 217-234

Description:

Nowadays the role of driver assistant systems is becoming more and more pertinent in the vehicle industry. The increasing automation level presents opportunity to involve the driver in any kind of network such as network among vehicles (V2X) and into vehicle and infrastructure connections. The essence of automation in case of the vehicle industry is to facilitate for the vehicle to provide services based on multi-information sources to help the driver because in modern transport systems the most cardinal criteria are environment friendly, plannable, cost efficient and safety travel. Thus, the stability of data transport plays the key role in case of connected vehicles. The following sections will present an opportunity in a detailed way to determine the vehicle’s position relying on the vehicle’s On-Board Diagnostic system based on the developed algorithm and will show how this method can help the driver assistant system’s reliable operation as well.

Open Access: Yes

DOI: 10.12700/APH.16.5.2019.5.12

A Nonlinear Computational Framework for Optimizing Steel End-Plate Connections Using the Finite Element Method and Genetic Algorithms

R. M. Movahedi Péter Grubits Tamás Balogh

Publication Name: Algorithms

Publication Date: 2025-08-01

Volume: 18

Issue: 8

Page Range: Unknown

Description:

The design of steel connections presents considerable complexity due to their inherently nonlinear behavior, cost constraints, and the necessity to comply with structural design codes. These factors highlight the need for advanced computational algorithms to identify optimal solutions. In this study, a comprehensive computational framework is presented in which the finite element method (FEM) is integrated with a genetic algorithm (GA) to optimize material usage in bolted steel end-plate joints, while structural safety is ensured based on multiple performance criteria. By incorporating both material and geometric nonlinearities, the mechanical response of the connections is accurately captured. The proposed approach is applied to a representative beam-to-column assembly, with numerical results verified against experimental data. By employing the framework, an optimized layout is obtained, yielding a (Formula presented.) improvement in the overall performance objective compared to the best-performing validated model and a (Formula presented.) reduction in material volume relative to the most efficient feasible alternative. Furthermore, a (Formula presented.) decrease in equivalent plastic strain is achieved compared to the configuration exhibiting the highest level of inelastic deformation. These findings demonstrate that the developed method is capable of enhancing design efficiency and precision, underscoring the potential of advanced computational tools in structural engineering applications.

Open Access: Yes

DOI: 10.3390/a18080460

Carotenoid quantification of Cucurbita spp. by spectrophotometry, high-performance liquid chromatography and photoacoustics

Ildikó Jócsák György Végvári Noémi Kappel Ottó Dóka

Publication Name: Acta Scientiarum Polonorum Technologia Alimentaria

Publication Date: 2019-01-01

Volume: 18

Issue: 2

Page Range: 143-152

Description:

Background. Photoacoustic spectroscopy (PAS) is a tool for the rapid and non-destructive identification of materials even without contact. In recent years, there have been several works concerning the applicability of PAS in food analytical measurements. The intention of this work is to identify whether there is a correlation between total carotenoid and the β-carotene content of pumpkin and squash measured by high-performance liquid chromatography (HPLC), spectrophotometry (SP) and PAS. Material and methods. 'Crown prince F1', 'Veenas F1', 'Atlas F1' and 'Apollo F1' (SAKATA) were used as experimental materials. The samples were measured in a fresh state and in a lyophilised condition with HPLC, SP and PAS. Results. The results of SP show that total carotene content varies according to the species and variety. Lyophilisation resulted in lower, although varying carotene content compared to the raw form. Typical PA spectra of pumpkins were determined (300-550 nm), normalized to the carbon black powder. At 17 Hz the amplitude and carotene content shows direct proportionality in the range investigated. Photoacoustic (PA) signal and carotenoid content of pumpkin samples gave a linear correlation (R2 = 0.9821). Conclusion. The measurement of PA spectra gives reliable information about the total carotene content of pumpkin and squash samples. These findings may allow the use of PAS as a fast tool for the carotenoid determination in squashes and give the possibility of instead for the results to be used for the evaluation of squash varieties currently used for industrial processing in functional food development.

Open Access: Yes

DOI: 10.17306/J.AFS.2019.0639

Quantifying the Effectiveness of Project-Based Editing Operations in Virtual Reality

Adam B. Csapo Tarek Setti

Publication Name: 2022 1st IEEE International Conference on Cognitive Aspects of Virtual Reality Cvr 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 49-54

Description:

With the rapid evolution of virtual reality solutions as general-purpose computing platforms, the ability of users to integrate their complete digital life into 3D spaces is becoming increasingly important. In this paper, we focus on ways to manipulate arrangements - or layouts - of 2D content in 3D spaces. We compare three different approaches to layout creation based on variations and combinations of previously proposed solutions. Through controlled experiments, we show that users can create content layouts with high accuracy and significantly less time if they can re-use already existing content layouts. These results support the idea that the effectiveness of virtual reality platforms as universal computing platforms can be improved by incorporating a 3D file system in which spatial dashboard layouts emerge as a central organizing concept.

Open Access: Yes

DOI: 10.1109/CVR55417.2022.9967642

Product design using a contact-optimization technique

Attila Baksa Tamás Szabó István Páczelt

Publication Name: Strojniski Vestnik Journal of Mechanical Engineering

Publication Date: 2007-07-01

Volume: 53

Issue: 7-8

Page Range: 442-461

Description:

It is well known that in engineering practice high stresses occur and that these stresses depend on the shapes and the loads of the bodies in unilateral contact. The stress distribution is often not smooth and has some singularities, thereby decreasing the lifetime of the machine elements. It is an important objective to obtain a smooth stress distribution when optimizing the shape of the elements. One of the goals of this paper is to present a method that resolves the above problem. By controlling the contact pressure a prescribed, smooth contact-pressure distribution can be achieved. The optimization problems take into account the limit stress constraints of the material. In the present paper two types of contact problems are investigated. Firstly, contact optimization problems are analyzed assuming linear elasticity and small displacements, including steady-state wear process. Two numerical examples are presented on this topic for a rolling machine element: a punch optimization and a shape optimization. We also investigated which parameter values of the controlling function result in the maximum loadability. This can be useful in the design of brakes or bearings. In the second part of the paper the solution of the contact problem for large displacements and deformations is investigated where an air-spring is analyzed by calculating the nonlinear load-displacement curve and comparing it with measurements. © 2007 Journal of Mechanical Engineering. All rights reserved.

Open Access: Yes

DOI: DOI not available

Terrorism with a «woman’s appearance»: Economic background and legal tools for forming a counteracting strategy

Eszter Lukács Roman Myroniuk Oksana Lehka Stanislava Myroniuk

Publication Name: Economic Annals Xxi

Publication Date: 2019-01-01

Volume: 177

Issue: 5-6

Page Range: 34-43

Description:

The authors have researched the phenomenon of female terrorism in the area of rational choice and economic benefit. Popular quotations «qui prodesse» and «сherchez la femme» are combined from these positions in the non-standard authors’ approach to understanding the motivational factors underlying extremist movements. It has been proved that the increase in the number of women in the ranks of terrorists is largely due to the so-called economic benefit factor for the terrorist acts organisers. The actions of a suicide bomber, in the broad sense, are predominantly based on a rational basis: the achievement of the last personal good - identity. The article presents the transformation of female terrorism in the historical perspective; actual conflicts and contradictions in international law and national legal systems, as well as false social attitudes and stereotypes complicating the fight against this dangerous social phenomenon. Data obtained from the social networks allows concluding that hundreds of women are now fighting in the ranks of militants in the East of Ukraine. At the beginning of the conflict, many of them hid their faces on personal pages on the Internet, hiding from their relatives a fact that they are hired killers. At the moment, most of them are proud of their participation in extremist groups, post their photos with weapons. Suicide terrorism of Muslim women and crimes committed by female militants in the East of Ukraine have one thing in common - the preparation and use of women as a living «weapon» by the extremist groups is cheaper either in terms of financial investments and costs for psychological brainwashing and military training. Based on the analytical data and identified patterns, we have argued the strategic directions of counteraction to female terrorism and have proved the following: mankind will be able to break this danger on the condition of a new, free of stereotypes way of thinking and coordinated efforts of the world community in all spheres of social life including economic, legal, socio- and cultural ones.

Open Access: Yes

DOI: 10.21003/ea.v177-03

Determining the dwell time constraint for switched H∞ filters

András Edelmayer Zsolt Horváth

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2019-01-01

Volume: 95

Issue: 1

Page Range: 7-11

Description:

This paper presents an algorithm for determining the minimum dwell time constraint for switched linear H∞ fault detection filters. When applying switched systems, ensuring the stability is a crucial part, which can be guaranteed, when we switch slowly enough between the subsystems, more precisely the intervals between two consecutive switching, called dwell time, are large enough. The problem formulation is based on multiple Lyapunov functions and is expressed through a special form of linear matrix inequities (LMIs), which include a nonlinear term with the dwell time. This represents a multivariable time dependent optimization problem. To solve this special formulated LMIs, we propose an algorithm, called Td-iteration, which is a combination of the procedure of interval halving with an LMI solver. The results of the illustrative example suggest further benefits.

Open Access: Yes

DOI: 10.15199/48.2019.03.03

The effect of digital curation on visitor behavior in museum expositions

Veronika Keller Fan Gao

Publication Name: Journal of Infrastructure Policy and Development

Publication Date: 2024-01-01

Volume: 8

Issue: 9

Page Range: Unknown

Description:

This study examines the impact of digitally curated museum exhibitions on visitor behavior, with a particular focus on university students from China and Hungary (n = 308). Using PLS-SEM analysis, the research finds that visitors’ experiences during digital curation visits significantly influence their behavior, and this influence is mediated by perceived value and satisfaction. It is recommended that museums consider the following constructive considerations to facilitate their future development: expanding the application of digital curation, utilizing cutting-edge technologies, implementing data-driven curatorial optimization, enhancing social experiences, integrating education and entertainment, and promoting cultural preservation and environmental stewardship. These insights will help guide museums toward more engaging and sustainable experiences.

Open Access: Yes

DOI: 10.24294/jipd.v8i9.6153

Linear-Matrix-Inequality-Based Controller and Observer Design for Induction Machine

Miklós Kuczmann Zoltán Németh

Publication Name: Electronics Switzerland

Publication Date: 2022-12-01

Volume: 11

Issue: 23

Page Range: Unknown

Description:

The modeling and drive control of electric machines are still actively researched scientific topics. Most of the existing models contain parameters that have no physical content or cannot be measured at all. For this reason, the use of observers in modern drive control algorithms is necessary. The main goal of this paper is to present the mathematical formalism of a linear matrix inequality (LMI)-based controller-observer design for a tensor product (TP) transformation-based model, including its implementation in a simulation environment. Based solely upon simulation results, the designed observer can provide a stable and accurate state space variable, regardless of the highly nonlinear induction machine model.

Open Access: Yes

DOI: 10.3390/electronics11233894