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Publications - 6374

Integrated Smart System for the Coordination of Traffic Light Traffic Management and Intelligent Public Lighting in Hungary

László Könözsy I. Lakatos Nikolett Fecser István Hausel Tamás Árvai

Publication Name: Periodica Polytechnica Transportation Engineering

Publication Date: 2023-01-01

Volume: 51

Issue: 1

Page Range: 49-56

Description:

In our study, the operation of a smart system in current operation and the implementation plan of traffic management by traffic lights of a junction are presented. Public lighting has a major effect on the efficacy of cities and the well-being and safety of their inhabitants. The energy consumed for public lighting entails significant costs for the urban management. In our constantly evolving world, there is an ever-growing demand for lighting, leading to the increase in expenses, as well. Smart cities are dedicated to apply the most energy-efficient solution in order to decrease expenses in respect of the safety of all road users.

Open Access: Yes

DOI: 10.3311/PPtr.20397

Linking digital platform design to circular supply chains: Evidence from knowledge sharing and collaboration mechanisms

Judit Petra Koltai Varun Chotia Shivani Agarwal Dezhen Li Rsha Alghafes

Publication Name: Technology in Society

Publication Date: 2026-06-01

Volume: 86

Issue: Unknown

Page Range: Unknown

Description:

Digital platforms are increasingly central to circular economy transitions, yet it remains unclear how platform design translates into measurable circular outcomes. This study addresses this gap by developing a socio-technical framework that explains how digital platform information transparency and interoperability enable circular value creation. Drawing on socio-technical systems theory, platform governance, and the dynamic capabilities perspective, the study conceptualizes platform design features as layered affordances that operate through governance and knowledge-based mechanisms. Using survey data from platform-enabled supply chain actors and analysing the model via PLS-SEM, the findings reveal that transparency and interoperability significantly enhance sustainability governance mechanisms, while transparency strengthens knowledge sharing intensity and interoperability supports collaborative decision-making. Sustainability governance mechanisms, in turn, drive both circular business model implementation and circular supply chain performance, whereas knowledge sharing intensity primarily supports business model transformation. Notably, collaborative decision-making does not directly improve circular supply chain performance, suggesting that collaboration without governance alignment remains insufficient. By unpacking the indirect pathways through which platform design shapes circular outcomes, the study advances platform governance and circular supply chain literature. It offers actionable insights for managers and policymakers seeking to design digital ecosystems that move beyond symbolic digitalization toward measurable circular performance and systemic value creation.

Open Access: Yes

DOI: 10.1016/j.techsoc.2026.103325

The Acquisition of Phonological Awareness in Children with Mild General Learning Difficulties: Delayed or Disordered Speech Development?

Enikő Csertán Krisztina Zajdó

Publication Name: On Under Reported Monolingual Child Phonology

Publication Date: 2020-01-01

Volume: Unknown

Issue: Unknown

Page Range: 274-323

Description:

No description provided

Open Access: Yes

DOI: DOI not available

Vibration damping measurement on car windshields

Balázs Vehovszky Karl Slenczka Tamás Jakubík István Horváth Martin Schuster

Publication Name: Periodica Polytechnica Mechanical Engineering

Publication Date: 2019-01-01

Volume: 63

Issue: 1

Page Range: 1-6

Description:

Knowledge of the damping properties of a windshield is a fundamental element of the acoustical characterization of a car. The measuring method of damping for a windshield is presented in the paper. The damping loss factor – as a basic measure of mechanical damping – was determined experimentally by two means: the reverberation time from impact hammer testing as well as the modal behavior from 3D laser scanning vibrometer measurements. The results proved that the modal shapes have a fundamental effect on the measured damping values.

Open Access: Yes

DOI: 10.3311/PPme.11559

Interaction Patterns of Spatial Navigation in VR Workspaces

Adam Csapo Anna Sudar

Publication Name: 10th IEEE International Conference on Cognitive Infocommunications Coginfocom 2019 Proceedings

Publication Date: 2019-10-01

Volume: Unknown

Issue: Unknown

Page Range: 615-618

Description:

During the discovery of any new environment-be it real or virtual-the first step is usually that of exploration. The goal exploration in this context is to find the location that provides the most informative, or otherwise useful viewpoint in the space. Depending on the complexity of the space and the task at hand, this can be a difficult challenge. Nevertheless, the finding of useful viewpoints can be facilitated, at least in virtual reality, by changing the layout of the space, as well as by changing other visual features to lower the cognitive load of navigation. In this paper, we present a set of experiments using the MaxWhere desktop virtual environment which suggest that besides the arrangement of a space, its key points of discovery can also influence the time it takes to accomplish a task. This conclusion is supported both by data on key points of navigation and on the activation mode that was utilized on the various smartboards laid out in 3D space. In this research, we hope to show how specific nodes can be found, based on a data-oriented approach, which can lead users to focus on the most important information and obtain the best overview of any virtual space in general.

Open Access: Yes

DOI: 10.1109/CogInfoCom47531.2019.9089998

Sharing communities – Community currency in the sharing economy

Eszter Szemerédi Tatay Tibor

Publication Name: Society and Economy

Publication Date: 2021-03-01

Volume: 43

Issue: 1

Page Range: 38-59

Description:

For the further development and more efficient operation of the sharing economy, a fast and inexpensive peer-to-peer payment system is an essential element. The aim of this study is to outline a prototype that ensures the automation and decentralization of processes through smart contracts without blockchain technology. The model has been built based on the narrative that a community currency created through smart contracts can promote genuine practices of sharing as opposed to the profit-oriented approach that most of the currently operating sharing economy platforms have. Features of the model, such as ease of use, high-speed transactions without transaction cost are benefits that can provide a more efficient alternative to the traditional or to the cryptocurrency-based centralized sharing economy platforms.

Open Access: Yes

DOI: 10.1556/204.2020.00027

Conjugacy in the discretized fold bifurcation

Gyula Farkas

Publication Name: Computers and Mathematics with Applications

Publication Date: 2002-01-01

Volume: 43

Issue: 8-9

Page Range: 1027-1033

Description:

In this paper, we construct a conjugacy between the time-1-map of the solution flow generated by an ordinary differential equation and its numerical approximation in a neighborhood of a fold bifurcation point. Our main result is that the conjugacy is O(hp)-close to the identity on the center manifold where h is the step size and p is the order of the numerical method. © 2002 Elsevier Science Ltd. All rights reserved.

Open Access: Yes

DOI: 10.1016/S0898-1221(02)80011-6

Methodology and Realization of Indoor Pass-by Noise measurement for passenger cars

Balázs Vehovszky Zsolt Gaszner

Publication Name: Journal of Physics Conference Series

Publication Date: 2023-01-01

Volume: 2677

Issue: 1

Page Range: Unknown

Description:

Nowadays the protection of human life is extremely important, and for this purpose the vehicles must go through a homologation process before the introduction to market. If we look at the acoustical requirements, one of the most important test procedures is the Pass-by Noise (PBN) measurement, which defines the noise emission limit value, when the observer stands beside the vehicle passing him by. There are two versions: Exterior (or Outdoor) and Indoor (or In-room) Pass-by Noise (IPBN) measurement. Former is presently the only accepted method for homologation; however, environmental and weather conditions could strongly influence its feasibility. For this reason, IPBN got into focus, with better suitability for development purposes and the prospect, that it will be accepted later for the homologation process too. This paper focuses on the IPBN method: gives an overview on the setup and presents the details of a realized test-measurement campaign. Beside the 2 most important points: the measuring room and the position of the sensors, the measurement devices, vehicle location and connection to measurement system, the measuring program and the whole process are presented together with some preliminary results related to different characteristics of the vehicle.

Open Access: Yes

DOI: 10.1088/1742-6596/2677/1/012004

Impact of proximity from chemical and pharmaceutical universities on startup founding: empirical evidence from the Visegrad countries

Áron Szennay Petra Kinga Kézai Melinda Krankovits

Publication Name: Discover Sustainability

Publication Date: 2024-12-01

Volume: 5

Issue: 1

Page Range: Unknown

Description:

This paper examines the spatial distribution of chemical startups in the Visegrad Countries (Czech Republic, Slovakia, Poland, and Hungary), highlighting their potential to drive technological innovation by creating new products or services under conditions of high uncertainty. The study focuses on the proximity of these startups to medical or chemical universities and those with biotechnological research fields to better understand their geographical patterns and potential knowledge spillovers. Data were drawn from Crunchbase, a comprehensive startup database, resulting in a final sample of approximately 333 operational chemical, pharmaceutical, or biotechnological startups. Companies were identified using keyword-based searches, while startup locations and distances to the nearest medical universities were recorded. Statistical methods were applied to assess spatial patterns. Results indicate that these startups are frequently located in cities with biotechnological, chemical, or medical universities. Our findings highlight different types of startup activities and levels of financial support across the Visegrad countries, emphasising the role of chemical startups in fostering technological advancement and sustainable development.

Open Access: Yes

DOI: 10.1007/s43621-024-00707-3