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Publications - 6374

Environmental games

Horváth Babett Cecilia Szigeti

Publication Name: Informacios Tarsadalom

Publication Date: 2012-12-01

Volume: Unknown

Issue: 4

Page Range: 85-105

Description:

The authors of this paper identified several online games, available over the Internet for free, which can be instrumental in children's environmental education. Taking advantage of widely spread use of information and communication technologies and the Internet, we can ensure that children get acquainted with the principles of sustainable development through enabling online games. 50 items of the authors' collection of games are randomly selected but considered useful for these purposes.

Open Access: Yes

DOI: DOI not available

Method of Assessing Cognitive Workload for Budapest Tram Drivers to Enhance Urban Traffic Safety †

Viktor Nagy Márton Nagy Attila Ferenc Bagosi

Publication Name: Engineering Proceedings

Publication Date: 2025-01-01

Volume: 113

Issue: 1

Page Range: Unknown

Description:

This study aims to enhance safety within the Budapest tram network by developing methods to assess and manage tram drivers’ cognitive workload. While defensive driving reduces accident risk, it becomes less effective when drivers are mentally overloaded. There is currently no reliable method to objectively measure this workload, which this research aims to develop. Trams frequently interact with unpredictable road users, increasing the likelihood of sudden braking and related injuries. Using accident data, high-risk locations were identified, and cognitive workload was assessed via eye-tracking (blinks and fixations) in a tram simulator. Participants drove two predefined routes and responded to unexpected events as they would in real traffic. Results reveal a correlation between blink/fixation frequency and cognitive load, enabling the identification of mentally demanding locations. These insights support targeted interventions to reduce driver workload and enhance operational safety.

Open Access: Yes

DOI: 10.3390/engproc2025113031

Training Capsule Networks with Various Parameters

Áron Ballagi Janos Hollosi

Publication Name: Saci 2019 IEEE 13th International Symposium on Applied Computational Intelligence and Informatics Proceedings

Publication Date: 2019-05-01

Volume: Unknown

Issue: Unknown

Page Range: 191-196

Description:

Nowadays convolutional neural networks (CNNs) have produced the state-of-The-Art performance in image classification and segmentation tasks. The efficiency of the neural networks is one of the bests when the testing samples are close to the training data. Nevertheless, if we make some transformation on the dataset, the performance of the convolutional neural network reduced. Recently, capsule networks (CapsNet) have been introduced to solve some of the problems of neural networks. In this paper we examine the effectiveness of three different capsule based neural networks, and compare the performance when the parameters of the dynamic routing algorithm and the squashing function are modified.

Open Access: Yes

DOI: 10.1109/SACI46893.2019.9111574

A use case of the simulation-based approach to mobile robot algorithm development

Claudiu Radu Pozna Erno Horváth Janos Hollosi Csaba Hajdu

Publication Name: Sami 2016 IEEE 14th International Symposium on Applied Machine Intelligence and Informatics Proceedings

Publication Date: 2016-03-01

Volume: Unknown

Issue: Unknown

Page Range: 311-314

Description:

A complex algorithm development progress for mobile robot (MR) usually requires a priori simulation of the whole dynamic environment before it is applied on a real-world robot. In order to reduce the development time and avoid programming mistakes it is recommended to use the same language for both simulation and real-word testing. The paper presents a certain use case for the simulation-based approach. In this use case V-REP is used for simulation, ROS for the real-world robot application and MATLAB or C# for algorithm development. Note that the source code of the work is available on a public GitHub repository.

Open Access: Yes

DOI: 10.1109/SAMI.2016.7423026

Vibration Spectrum of an Act-and-Wait Controlled System With Significant Damping

Mate Antali Péter Szalai

Publication Name: Iet Control Theory and Applications

Publication Date: 2026-01-01

Volume: 20

Issue: 1

Page Range: Unknown

Description:

Act-and-wait concept in control theory is a tool for enhancing the control quality by decreasing the destabilising effect of time delay. As was shown in other works, applying the act-and-wait concept to a PD position control increases the available range of proportional gains, which reduces the steady-state error of dry friction. In this paper, we focus on the vibration phenomena at the boundaries of the dynamic stability from the aspect of the vibration spectrum. We consider a single-degree-of-freedom mechanical model of DC actuators that contains significant effective damping. At different types of stability limits, new analytical and semi-analytical results are derived for the vibration spectrum. The results are validated by numerical calculations and experiments on a linear DC actuator.

Open Access: Yes

DOI: 10.1049/cth2.70111

Stability analysis and performance comparison of five 6to4 relay implementations

Sándor Répás Viktor Horváth Gábor Lencse

Publication Name: Infocommunications Journal

Publication Date: 2016-06-01

Volume: 8

Issue: 2

Page Range: 1-10

Description:

Even though the present form of IPv6 has been existing since 1998, the adoption of the new protocol has been very slow until recently. To help the adoption of the IPv6 protocol, several transition technologies were introduced. The 6to4 protocol is one of them, and it can be used when an IPv6 enabled host resides in an IPv4 only environment and needs to communicate with other hosts in such circumstances or with native IPv6 hosts. Five open source 6to4 relay implementations were investigated: Debian Linux - sit, Debian Linux - v4tunnel, OpenWrt - sit, FreeBSD - stf, NetBSD - stf. The measurement method is fully described including our measurement scripts and the results of the measurements are disclosed in detail. The measurements have shown that there are major differences between the different types of implementations.

Open Access: Yes

DOI: DOI not available

A refinement of Sándor-Tóth's inequality

Claudiu Radu Pozna Nicuşor Minculete Radu Emil Precup

Publication Name: Journal of Inequalities and Applications

Publication Date: 2012-12-10

Volume: 2012

Issue: Unknown

Page Range: Unknown

Description:

The objective of this article is to show a refinement of Sándor-Tóth's inequality related to the arithmetic functions which use unitary divisors. A new estimate of the average order of the arithmetic function given by Sándor-Tóth's inequality is suggested. © 2012 Minculete et al.

Open Access: Yes

DOI: 10.1186/1029-242X-2012-4

Measurement and analysis of logistic stresses in packaging with a carrying handle

No authors available

Publication Name: 18th IAPRI World Packaging Conference

Publication Date: 2012-12-01

Volume:

Issue:

Page Range: 347-354

Description:

Carrying handles of packagings have a great importance in the comfortable and safe handling of packed products. Producers and consumers have to face occasionally damaged carrying handles that considerably increase the possibility of the damage of the product. These carrying handles are of a wide variety, depending on the package size, packaging material, weight, etc. The main reason for frequent product damages is due to the fact that producers lack the sufficient knowledge of stresses. In this paper we analyze the stresses and propose a measurement process for packaging with a carrying handle. We measure the stresses via a range of standard equipment (cameras, accelerometers, shaker table). In addition, we provide a general framework and the description of a test environment for the accurate reproduction of the logistic stresses appearing in packaging with a carrying handle.

Open Access: No

DOI: DOI not available

The Method of Fundamental Solutions Combined with a Multi-level Technique

Csaba Gáspár

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

Publication Date: 2019-01-01

Volume: 11386 LNCS

Issue: Unknown

Page Range: 241-249

Description:

A traditional idea of the Method of Fundamental Solutions is to use some external source points where the fundamental solution should be shifted to. However, the proper definition of the locations of the sources can hardly be performed in an automated way. To circumvent this difficulty, in this paper, the source points defined along the boundary, and the collocation points are shifted to the interior of the domain together with a proper modification of the boundary conditions. Thus, the problem of singularity is avoided. The modified boundary conditions are defined on the basis of the tools of the classical finite difference methods. Several schemes are presented. The schemes can be embedded in a multi-level context in a natural way. The proposed method avoids the computational difficulties due to ill-conditioned matrices and also reduces the computational complexity of the Method of Fundamental Solutions.

Open Access: Yes

DOI: 10.1007/978-3-030-11539-5_26