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Found 6412 publications

Quantifying Capacity Reductions from Pedestrian Activity at Unsignalized Crosswalks: A Queuing-Based Assessment Across 24 Hungarian Sites

Emese Makó Souvathone Phetoudom

Publication Name: Lecture Notes in Networks and Systems

Publication Date: 2026-01-01

Volume: 1768 LNNS

Issue: Unknown

Page Range: 127-135

Description:

This study applies an approximate queuing framework to analyze pedestrian flow at 24 crosswalks in Hungary. Data on pedestrian and vehicle volumes, crosswalk dimensions, and vehicle speeds were collected. Key parameters such as pedestrian arrival rates, crossing times, and waiting times were estimated using simplified queuing assumptions. The analysis reveals that pedestrian flow and occupancy significantly impact crosswalk capacity, with reductions ranging from 3% to 50%, particularly at locations with high pedestrian volumes and longer crossing durations. Findings highlight the importance of pedestrian flow characteristics in capacity estimation and demonstrate the practicality of this framework for assessing crosswalk performance. This study applies queuing-based flow analysis across multiple real-world sites using low-data, accessible methods. The results provide valuable insights for urban planners seeking to optimize pedestrian safety and improve crosswalk efficiency, emphasizing the need for targeted interventions like signal timing adjustments and crosswalk redesigns. This approach offers a cost-effective tool for preliminary capacity analysis, supporting informed decision-making in urban transportation planning and pedestrian management.

Open Access: Yes

DOI: 10.1007/978-3-032-13898-9_15

Development of comparative investigation method for timing chain wear analysis using oscillating tribometer

Cs Tóth-Nagy Rajmund Kuti J. Rohde-Brandenburger L. Paulovics

Publication Name: Acta Technica Jaurinensis

Publication Date: 2021-11-24

Volume: 14

Issue: 4

Page Range: 406-423

Description:

This paper presents the development of a test procedure to investigate timing chain components under abrasive stress on a tribometer. Engine developers use cost and time expensive engine dynamometer tests to investigate timing chain life expectancy under different conditions. Tribometer tests are fast and cost effective, but these use standardized specimen material and geometry that greatly differ from the original tribological system of the timing chain. Manufacturing specimens from the original chain material using the original technology is complicated; surface quality and hardness properties cannot be guaranteed. The aim of research was to develop a test method for rapid and cost-effective comparison of engine lubricants, timing chain materials or coatings, as well as to assess the wear resistance of the chain to contaminants. Various uncontaminated and carbon black blended lubricants were compared using standard-based ball-on-disc tribometer tests to tribometer tests using actual timing chain components (bush-on-pin test) of a Diesel engine. Lubricants were ranked in terms of coefficient of friction and wear. Results showed that bush-on-pin tests were comparably suitable for testing lubricants when evaluated against standard ball-on-disc tribometer tests.

Open Access: Yes

DOI: 10.14513/actatechjaur.00620

Kornai’s “main line of causality”: The case of socialist Albania and SFR Yugoslavia, with a special focus on their banking sectors’ ownership structure

Eszter Kazinczy

Publication Name: Acta Oeconomica

Publication Date: 2023-11-03

Volume: 73

Issue: Unknown

Page Range: 173-190

Description:

Based on the structure of János Kornai’s ‘main line of causality’, two unique country cases are compared within the former European socialist bloc: Albania and the Socialist Federal Republic of Yugoslavia. The research provides a comparative analysis with an overview of the two countries’ development between World War II and the fall of the socialist regimes. Special attention is paid to the period following the 1970s as the underlying reforms had been implemented in Yugoslavia by then, leading to fundamentally different socialist prototypes. Regarding the differences, the analysis also gives an insight into the structure of the two respective banking systems. Kornai’s ‘main line of causality’ provides the framework for the current research, supplemented by the respective literature. The analysis concludes that despite the fact that all blocks of the causality line differed in the two systems, similar challenges had to be addressed during the transition period. Furthermore, Albania and the successor states of Yugoslavia reflected a range of common characteristics, which implies the relevance of path dependence.

Open Access: Yes

DOI: 10.1556/032.2023.00041

Sensitivity analysis of tooth microgeometric modifications on vibroacoustic behaviour in helical gears with harmonically distributed variations

Ambrus Zelei Krisztián Horváth

Publication Name: Journal of Physics Conference Series

Publication Date: 2026-01-01

Volume: 3190

Issue: 1

Page Range: Unknown

Description:

The virtual acoustic testing of gear drives has gained growing importance. Fundamentally, the transmission error (TE) is predicted, since it directly affects the vibration and noise characteristics. In this study, the effect of the harmonically distributed tooth microgeometric variations on the TE is investigated via elastic multibody simulations of a helical gear pair. The sensitivity analysis focused on the tip relief, the root relief and the barrelling. The model considered different degrees of linear-, quadratic- and cubic-harmonically distributed variations. The results showed that barrelling with quadratic harmonic micro-geometry had the most significant effect on TE. In addition, if harmonic distributions accidentally coincide in the pairing of the gears, the TE is significantly amplified, leading to a pronounced excitation of the system dynamics.

Open Access: Yes

DOI: 10.1088/1742-6596/3190/1/012005

The role of customers' involvement in value co-creation behaviour is value co-creation the source of competitive advantage?

Ida Ercsey

Publication Name: Journal of Competitiveness

Publication Date: 2017-09-01

Volume: 9

Issue: 3

Page Range: 51-66

Description:

According to service dominant logic (SDL), customers are always active participants and collaborative partners in exchanges; therefore we should focus on the elements of consumer behaviour that are connected with the value co-creation. By involving the customers in service production, providers can capture customers' needs and maintain their competitiveness. The cutomers' roles may lead to a higher productivity and competitive quality for companies. Previous researches recognized two types of the customers' co-creation behaviour. First, it is the consumers' participation behaviour. Then, the other one is the consumers' citizenship behaviour. The goal of our study is to examine how the level of involvement influences two kinds of behaviour mentioned. Besides, we explore if respondents' participation behaviour or citizenship behaviour influence the perceived value of service provided. In 2015, for examination of our research questions, we carried out a quantitative research and applied quota sampling to obtain data from two target groups (X and Y generations). The activity and attitude of individuals related to performance of an extra-role in service interaction is less favourable than the required in-role behaviour. According to the results of our survey, the level of involvement influences the customers' mandatory behaviour and volunteer behaviour when working on a co-creation value. Empirically verifiable, the service users' activity in a value creation affects customers' value of the service.

Open Access: Yes

DOI: 10.7441/joc.2017.03.04

ENOUGH FROM THE LAMELLA

Andor Wesselényi-Garay

Publication Name: Metszet

Publication Date: 2024-01-01

Volume: 15

Issue: 3

Page Range: 34-41

Description:

I think there is not a Hungarian architect who has not asked themself at least once what Hungarian architecture is. Therefore, what steps can be taken when invited to redevelop the external appearance of an offi- ce in the centre of Pest. How does one achieve an architecture that in- forms a Hungarian identity? Does the choice of employing external lamella wall systems answer this is terms of aesthetic or even contem- porary technological implementation? Or is the lamella something that should be passed over as it reduces a building to being an identity/na- tionality free shell? The intention is acceptable, but at what cost?

Open Access: Yes

DOI: 10.33268/Met.2024.3.4

Effective lane width analysis for autonomous trucks

Richárd Nagy Mohammad Fahad

Publication Name: SN Applied Sciences

Publication Date: 2023-09-01

Volume: 5

Issue: 9

Page Range: Unknown

Description:

Lateral wander of autonomous truck can be further improved by optimizing the uniform wander. Increase in available lane width for the autonomous trucks can increase the performance efficiency of this mode. This research is based on finding the optimum, combination of lane width increment and asphalt layer thickness reduction among different scenarios. Therefore, In this research with assumed maximum lane width of 4.35 m, difference combination of lane width and asphalt layer thickness scenarios have been analyzed using finite element modelling in ABAQUS. Considering the base pavement width of 3.75 m, increment for each scenario is 15 cm and reduction in asphalt layer thickness is at 2 cm. Performance efficiency of each scenario is conducted while considering the initial construction costs and damage assessment for each scenario. Moreover, life cycle cost analysis (LCCA) is conducted for the base scenario and selected optimum scenario. Results show that increase in pavement width beyond 4.2 m, renders the scenarios uneconomical and thus, the scenario consisting of 4.2 m lane width and 16 cm asphalt layer thickness yield a maximum performance efficiency of 20% among all other alternatives. LCCA analysis shows that a difference in salvage value of 42 million Euros exists when compared with the base scenario. By selecting the optimum lane width of 4.2 m and asphalt layer thickness of 16 cm, Pavement lifetime can be further increased by 13 years with full depth reclamation used as maintenance intervention.

Open Access: Yes

DOI: 10.1007/s42452-023-05446-0

In vitro tesztrendszer alkalmazása probiotikus baktériumtörzsek szelektálására

Judit Süle Zoltán Hatvan Z. Kerényi László Varga

Publication Name: Elelmiszervizsgalati Kozlemenyek

Publication Date: 2022-06-30

Volume: 68

Issue: 2

Page Range: 3904-3915

Description:

No description provided

Open Access: Yes

DOI: 10.52091/EVIK-2022/2-4-ENG

Environmental Impacts of Urbanization - Changes of the Ecological Footprint of Commuting in the Urban Region of Budapest

Kondor Attila Csaba Szabó Balázs Szigeti Cecília Kovács Zoltán Egedy Tamás

Publication Name: Teruleti Statisztika

Publication Date: 2017-09-01

Volume: 57

Issue: 5

Page Range: 469-494

Description:

The main aim of this paper is to explore how daily commuting has contributed to the changes of ecological footprint in the Buda-pest urban region since 1990 by using census data of 1990, 2001 and 2011. First, the func-tional urban region of Budapest was delim-ited using the 15% threshold of daily com-muting to work to Budapest in 2001. Accord-ing to international methodology 185 sur-rounding municipalities and Budapest were defined as the urban region. Using data on the transport vehicle of commuting the vol-ume of CO2 emissions was estimated at mu-nicipal level for the 185 municipalities. Final-ly, on the basis of emission values the ecolog-ical footprint of the whole urban region was estimated. Our results show declining ecolog-ical footprint values throughout the 1990s, due to decreasing commuting rates, which is the result of economic restructuring, growing unemployment and less mobility of the la-bour force. However, as commuting in-creased due to economic upswing after 2000 the ecological footprint also grew, the use of motor vehicles (private car and bus) in com-muting substantially and dynamically in-creased. In the reviewed periodspatial struc-ture of commuting significantly changed: rail-commuting shrunk into a few outstanding transport axes, whereas the use of passenger cars increased also in the less booming areas of the urban agglomeration.

Open Access: Yes

DOI: 10.15196/TS570501