Search Everything

Tip: Search using "First Name + Last Name", e.g.
János Kiss instead of Kiss János.

Publications - 6525

A Study of Unmanned Store Adoption among University Students: A Control Variable Perspective

Szabolcs Ramhap Eszter Szabó-Szentgróti Petra Kinga Kézai

Publication Name: Decision Making Applications in Management and Engineering

Publication Date: 2025-01-01

Volume: 8

Issue: 1

Page Range: 364-379

Description:

In the past nine years, a significant trend has emerged in the retail sector with the rise of cashier less and unmanned stores. This technological innovation is becoming increasingly widespread across various countries, although its availability remains somewhat limited in Hungary. The current study investigates the extent to which students in Hungarian higher education institutions are willing to adopt this technology. It explores the factors influencing attitudes toward cashierless shopping, using the extended Unified Theory of Acceptance and Use of Technology (UTAUT2) as the theoretical framework. Seven hypotheses were formulated based on a comprehensive review of existing literature and research models. In addition to these core hypotheses, the study also assessed whether three control variables income, gender, and location had an impact on key latent variables within the model. Data collection was conducted via an online questionnaire, which garnered responses from 843 participants. The study employed variance-based structural equation modelling (PLS-SEM) to analyse and test the proposed research model. The results revealed that performance expectancy, effort expectancy, social influence, and hedonic motivation had a strong and positive influence on behavioural intention toward using cashier less stores. Regarding the control variables, significant relationships were identified between income and atmosphere variable, as well as income and price sensitivity. Furthermore, gender was found to have a significant influence on hedonic motivation, suggesting that these demographic factors play a moderating role in shaping attitudes toward unmanned store technology. The findings of this study provide valuable insights for practitioners and policymakers in the retail industry who are considering the implementation of cashier less technology. The diffusion of this technology is expected to grow, making it crucial to investigate factors that influence not only intentions but also the actual use of unmanned stores.

Open Access: Yes

DOI: 10.31181/dmame8120251371

Optimizing urban road cross-section’s design to accommodate safe autonomous vehicle-cyclist interactions: A bicycle simulator study

Attila Borsos Amira Hammami

Publication Name: Transportation Research Part F Traffic Psychology and Behaviour

Publication Date: 2026-03-01

Volume: 118

Issue: Unknown

Page Range: Unknown

Description:

The introduction of autonomous vehicles (AVs) in urban environments where cycling activity is present has raised the need to investigate potential modifications to urban roads, not only from the perspective of AVs but also from the perspective of cyclists. This study aims to investigate the effect of different road design characteristics and varying traffic penetration rates of AVs, using a bicycle simulator study. 50 participants assessed their perceived level of safety, comfort and stress in 11 randomized scenarios. The scenarios involve a design with sharrows and four designs with separated cycling lanes (with two different cycling lane width and two pavement painting options), with 3 AV traffic penetration rates (TPR): 0 %, 50 %, and 100 %. A series of cumulative link mixed models (CLMM) was estimated to analyze the impact of design characteristics and TPRs on cyclist perceptions. The results revealed that the implementation of AVs in shared road scenarios did not improve cyclist safety. On the contrary, it has significantly reduced the perceived level of comfort and has significantly increased the perceived level of stress. However, in separated cycling lane designs, the presence of AVs was found to positively affect cyclist perceptions, although this impact was not significant. Furthermore, the study revealed that the most important factor that affects perceptions of safety, comfort, and stress is the separation between traffic and cycling lanes.

Open Access: Yes

DOI: 10.1016/j.trf.2025.103488

Simulation of phase transformations in steel parts produced by laser powder deposition

Lino Costa Augusto Moita De Deus Imre Felde R. Colaço Tamás Réti R. Vilar

Publication Name: Materials Science Forum

Publication Date: 2005-01-01

Volume: 473-474

Issue: Unknown

Page Range: 315-320

Description:

Multilayer laser powder deposition is being used for the rapid manufacturing of fully dense near net shape components in a wide variety of materials. In this process parts are built by overlapping consecutive layers of a laser melted material. As a result of this overlapping, the material in each layer will undergo successive thermal cycles as new layers are deposited. Despite their short duration, these thermal cycles can activate solid-state transformations that lead to progressive modification of the microstructure and properties of the material. Since the thermal history of the material in the deposited part will differ from point to point, the part will present a complex and heterogeneous microstructure, and properties that differ from point to point. Given that the microstructure and property distribution in steel parts produced by laser powder deposition can only be predicted by modelling, a three-dimensional thermo-kinetic finite element model of laser powder deposition of tool steels was developed, In the present work this model was applied to the study of the influence of substrate size on the microstructure and properties of a six-layer wall of AISI 420 tool steel. The results show that the temperature field depends significantly on the size of the substrate, leading to distinct microstructures and properties in the final part. © 2005 Trans Tech Publications, Switzerland.

Open Access: Yes

DOI: 10.4028/0-87849-957-1.315

Optimizing Sustainability in Bridge Projects: A Framework Integrating Risk Analysis and BIM with LCSA According to ISO Standards

Rana Ahmad Maya Dema Munef Ahmad László Gáspár

Publication Name: Applied Sciences Switzerland

Publication Date: 2025-01-01

Volume: 15

Issue: 1

Page Range: Unknown

Description:

Building bridges sustainably is essential for advancing infrastructure development and ensuring long-term environmental, social, and economic viability. This study presents a framework that integrates risk management strategies and Building Information Modeling (BIM) with Life Cycle Sustainability Assessment (LCSA) standards to enhance bridge project sustainability. Through a targeted survey, the study evaluates risks across bridge lifecycle phases, identifying the main processes that significantly impact sustainability. Using the Pareto Principle, the framework prioritizes these processes and associated risks, guiding the creation of targeted improvement guidelines aligned with ISO 9001:2015, BIM, and LCSA standards, which support high quality and efficiency. The results reveal that 38 of 55 identified risks account for 80% of the lifecycle impact, and they include the majority of those derived from international standards, underscoring their significance in sustainability efforts. Additionally, 36 of 47 main processes are subject to 80% of the impact from these vital risks, highlighting phases like Construction and Supervision as priority areas for intervention. By linking specific risks to each process within these phases, the study outlines essential guidelines and strategic measures, ensuring a focused approach to sustainable bridge development that aligns with international standards and maximizes lifecycle sustainability outcomes.

Open Access: Yes

DOI: 10.3390/app15010383

Effect of bacterial inoculation on co-composting of lavender (Lavandula angustifolia Mill.) waste and cattle manure

E. Lakatos Ágnes Nagy Babett Greff András Sáhó Jenő Szigeti L. Varga

Publication Name: 3 Biotech

Publication Date: 2021-06-01

Volume: 11

Issue: 6

Page Range: Unknown

Description:

The primary purpose of this study was to investigate the influence of Cellulomonas flavigena and Streptomyces viridosporus, as a bacterial inoculant, on the compostability of post-extraction lavender waste. The major physicochemical, microbiological, and biological properties of the composting materials were monitored for 161 days. The technology developed was shown to improve the compostability of recalcitrant herbal residues. The use of lavender waste beneficially affected the composting process by extending the thermophilic phase, accelerating the degradation of organic matter, and elevating the viable counts of useful microorganisms; however, adverse effects were also observed, including an increased carbon-to-nitrogen ratio (19.05) and a decreased germination index (93.4%). Bacterial inoculation was found to preserve the nitrogen content (2.50%) and improve the efficiency of biodegradation. The Salmonella- and Escherichia coli-free final composting products were mature, stable, and ready for soil application. To the authors’ knowledge, no previous research has investigated the compostability of lavender waste. Likewise, this is the first study that has used strains of C. flavigena and S. viridosporus in combination to facilitate a composting process.

Open Access: Yes

DOI: 10.1007/s13205-021-02860-2

Changes in the Properties of Thermal Insulation Materials Due to Environmental and Exposure Factors: Examination of Autoclaved Aerated Concrete Thermal Insulation Mineral Boards

Szabolcs Fischer Dávid Bozsaky Attila Németh Dániel Harrach Gusztáv Baranyai Dániel Hegedűs András Pollák

Publication Name: Lecture Notes in Networks and Systems

Publication Date: 2026-01-01

Volume: 1768 LNNS

Issue: Unknown

Page Range: 91-99

Description:

The energy performance of buildings has become increasingly important, driven by efficiency, awareness, and sustainability goals. While attention often focuses on passive or zero-emission buildings, upgrading the thermal insulation of existing stock remains essential. In Hungary, many buildings still fail to meet current standards, from 19th-century apartments in Budapest to post-war panel blocks designed without thermal considerations. This study examined mineral-based insulation boards made from autoclaved aerated concrete under controlled exposure scenarios: cold winter (−20 °C), humid spring/autumn (10 °C, 90% RH), and hot summer (70 °C, 20% RH). Standardized tests assessed mass variation, compressive strength, thermal conductivity, and short-term water absorption. Results show that high humidity caused up to 14% loss of compressive strength and a 17–18% increase in thermal conductivity after 14 days, severely reducing insulation capacity. In contrast, extreme cold and heat induced only minor changes. Moisture was identified as the most critical factor compromising both mechanical stability and energy efficiency. The findings provide reproducible evidence of environmental sensitivity and underline the importance of durability assessments in designing and retrofitting energy-efficient buildings.

Open Access: Yes

DOI: 10.1007/978-3-032-13898-9_11

Transition in the mining industry with green energy: Economic dynamics in mining demand

Laszlo Vasa Ashutosh Kolte Omkar Hirlekar

Publication Name: Resources Policy

Publication Date: 2025-01-01

Volume: 100

Issue: Unknown

Page Range: Unknown

Description:

This paper examines transformation of the mining industry in the Global South due to the rising demand for electric vehicles (EVs), which is a part of disruptive green technologies. South Africa & Democratic Republic of the Congo (DRC) are two important suppliers of critical minerals like cobalt, nickel, lithium, copper. This research tries to explore economic dynamics of mineral extraction and green transport. Using quantitative regression analysis, this paper tries to find the relationship between demand for EVs and its economic impact on mining industry's overall sales. The analysis has shown impact of critical minerals & mining sale and how disruptive technology like Evs are affecting mineral-rich countries sustainable mining. This paper is trying to shows some light on economic importance of critical minerals in transition of mining industry due to green vehicles or Evs. The association between the emerging green technology and the mining sector. The study focuses on nations in the Global South that have substantial control over the supply chain of essential minerals used in electric car batteries. The main objective of this study is to conduct an academic investigation of the many implications of green transport on the mining sector in the Global South.

Open Access: Yes

DOI: 10.1016/j.resourpol.2024.105409

Soil moisture distribution mapping in topsoil and its effect on maize yield

Viliam Nagy G. Milics Zoltán Varga A. Kovács Attila Pörneczi Gábor Baranyai A. Nyéki Lubomír Lichner M. Neményi Tamás Németh

Publication Name: Biologia Poland

Publication Date: 2017-08-28

Volume: 72

Issue: 8

Page Range: 847-853

Description:

Soil moisture content directly influences yield. Mapping within field soil moisture content differences provides information for agricultural management practices. In this study we aimed to find a cost-effective method for mapping within field soil moisture content differences. Spatial coverage of the field sampling or TDR method is still not dense enough for site-specific soil management. Soil moisture content can be calculated by measuring the apparent soil electrical conductivity (ECa) using the Veris Soil EC-3100 on-the-go soil mapping tool. ECa is temperature dependent; therefore values collected in different circumstances were standardized to 25°C temperature (EC25). Constants for Archie's adjusted law were calculated separately, using soil temperature data. According to our results, volumetric moisture content can be mapped by applying ECa measurements in our particular field with high spatial accuracy. Even though within-field differences occure in the raw ECa map standardization to EC25 is recommended. Soil moisture map was also compared to yield map showing correlation (R2 = 0.5947) between the two datasets.

Open Access: Yes

DOI: 10.1515/biolog-2017-0100

Modelling and Sensitivity Analysis of Nonlinear Firefighting Systems Using Maple

Flóra Hajdu Rajmund Kuti Gyozo Molnárka

Publication Name: Communications in Computer and Information Science

Publication Date: 2021-01-01

Volume: 1414

Issue: Unknown

Page Range: 234-251

Description:

Mathematical modelling and numerical simulations have greatly contributed to the development of technical sciences in the recent decades. With powerful tools, like Maple, the examination of ever newer engineering applications in simulation environment was made possible. This paper gives an overview of mathematical modelling and numerical examination of nonlinear fire truck suspension systems using Maple. The examined models are the suspension system of a heavy-duty fire truck with different degrees of freedom and a special double-cabin fire truck suspension system with a crew compartment. The construction of mathematical models, their implementation to Maple and the numerical simulation results are explained. Detailed One-at-a-Time sensitivity analysis results using a novel fuzzy logic based evaluation method developed in Maple are also presented. With the proposed method an extended parameter range can be examined and the parameters can be easily compared. From the sensitivity analysis it was concluded that the spring characteristics and the road models greatly affect simulation results.

Open Access: Yes

DOI: 10.1007/978-3-030-81698-8_16