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Publications - 6374

Experimental results of sliding and welding tests in a novel construction method for steel-concrete composite bridges

János Szép Daniel Gosztola

Publication Name: Fib Symposium

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 923-930

Description:

The primary objective of this study is to introduce a novel construction method used for steel-concrete composite bridges. Throughout the article, domestic and international solutions and practices will be provided for various girder-prefabricated deck slab connections, as well as construction methods for steel-concrete composite bridges. The new bridge construction technology involves the construction of a prefabricated deck slab on-site, which is moved into its final position on the main girders. During prefabrication, a stud plate is positioned within the formwork, facilitating the sliding of the deck slab elements onto the girder. The upper flange and stud plate are joined by welding following the sliding of the deck parts. The key challenge for this technology is achieving a sufficiently low friction coefficient between the stud plate and the flange using a suitable material. However, it is imperative to identify a material that can be compatible with the welded connection. Laboratory experiments were carried out to investigate the effect of materials on the friction coefficients between steel plates and the welding of the connection. The ideal material has been identified through experiments to lower the coefficient of friction to 4-8% while the welded joint can be achieved.

Open Access: Yes

DOI: DOI not available

Consumption patterns in urban sophisticate branding. A qualitative perspective on its psychological foundations

Ebtesam Abdullah Alzeiby Dhruv Galgotia Eszter Szabó-Szentgróti Nidhi Sahore

Publication Name: Acta Psychologica

Publication Date: 2026-02-01

Volume: 262

Issue: Unknown

Page Range: Unknown

Description:

The emergence of the urban sophisticate consumer has led to changing consumption patterns in the global retail landscape. While there has been a surge in academic literature examining various aspects of urban sophistication, empirical studies examining the attributes of the urban sophisticated consumer in the context of fashion apparel, fashion accessories, and grooming products still need to be included. This study investigates the concept of ‘urban sophisticate’ consumers in the context of marketing, branding, and retailing for the first time. It has proposed a conceptual framework for retailing to urban sophisticates through a qualitative inductive method based on the empirical analysis of the open essay-based responses collected from working men in the UK. The factors making this consumer segment lucrative for retailers include high spending power, focus on appearance, desire for quality, and the availability of unique products as per their preferences. Urban sophisticate consumers prefer modern, high-end fashion items and have shown displeasure towards unsustainable fast fashion. The study's findings will benefit grooming product companies, fashion apparel and accessories marketers, and retailers by providing insights into the behaviour of urban sophisticate consumers. Furthermore, this study could be a turning point to elicit marketers' experimentation in designing new products and expanding their product base to include additional product offerings that could interest urban sophisticates.

Open Access: Yes

DOI: 10.1016/j.actpsy.2025.106049

Seismic performance evaluation of an irregular RC frame building

Zsolt Szilvágyi R. P. Ray

Publication Name: Geotechnical Engineering for Infrastructure and Development Proceedings of the Xvi European Conference on Soil Mechanics and Geotechnical Engineering Ecsmge 2015

Publication Date: 2015-01-01

Volume: 7

Issue: Unknown

Page Range: 4185-4190

Description:

This paper focuses on overcoming difficulties associated with the assessment of a multi-story reinforced concrete frame building constructed in several phases over time, with an irregular layout. Trying to develop a coherent, safe and sensible design in such a case is indeed a challenge for structural and geotechnical engineers. The retrofitting problem is made worse by incomplete data, a building with shallow and deep foundations, and architectural "re-purposing" of the entire structural assembly. A state-of-the art seismic performance evaluation according to Eurocode 8-3 is presented as a case study, with special emphasis on the topics of numerical modeling and foundation modeling. Potential modeling simplifications are considered as well.

Open Access: Yes

DOI: DOI not available

How to design a dynamically-feasible heat exchanger network? Insights gained from experience

Hao Yeh Lee Ákos Orosz Bing Shen How Zong Yang Kong Tiffany Ang Ferenc Friedler

Publication Name: Energy

Publication Date: 2026-02-01

Volume: 344

Issue: Unknown

Page Range: Unknown

Description:

This paper aims to share the challenges encountered by the authors while exploring the significance of controllability in the early stage of heat exchanger network (HEN) design, particularly through the use of P-HENS – a graph theoretic-based HEN synthesis tool for multi-solution HEN synthesis. Presently, no existing studies have leveraged P-HENS-derived networks to reveal insight on how network topology affects its dynamic performance. This work began with a 5-stream problem as a base case, where P-HENS was used to generate four feasible HENs that meets the minimum energy requirement (MER). A preliminary screening narrowed these options to two configurations, which were then simulated in Aspen Plus. Bypass are added to the two selected HENs for further control studies in Aspen Plus Dynamics. The results indicated that both HENs could handle only some disturbances and return the outlet temperature to its nominal value, with some cases showing marginal deviations. Then, different bypass values (e.g., 0.1 and 0.5) were explored to analyze its impact on control performance but it reveals that even with a larger bypass value of 0.5, the HEN struggled to adequately adjust during disturbances. The findings from this work showed that the controllability of the HEN is collectively influenced by the bypass value, the temperature difference of the “direct inlet and outlet of the heat exchanger”, and the temperature difference of the “inlet streams of both hot and cold streams placed in the heat exchanger”. A generic workflow that would help future researchers avoid similar pitfalls has been presented.

Open Access: Yes

DOI: 10.1016/j.energy.2026.139903

Incorporating Survey Perceptions of Public Safety and Security Variables in Crime Rate Analyses for the Visegrád Group (V4) Countries of Central Europe

Dávid Fekete Usman Ghani Peter Toth

Publication Name: Societies

Publication Date: 2022-12-01

Volume: 12

Issue: 6

Page Range: Unknown

Description:

Public governance has evolved in terms of safety and security management, incorporating digital innovation and smart-analytics-based tools to visualize abundant data collections. Urban safety and security are vital social problems that have many branches to be solved, simplified, and improved. Currently, we can see that data-driven insights have often been incorporated into planning, forecasting, and fighting such challenges. The literature has extensively indicated several aspects of solving urban safety problems, i.e., social, technological, administrative, urban, and societal. We have a keen interest in the data analysis and smart analytics options that can be deployed to enhance the presentation, promotional analysis, planning, forecasting, and fighting of these problems. For this, we chose to focus on crime statistics and public surveys regarding victimization and perceptions of crime. As we found through a review, many studies have indicated the vitality of crime rates but not public perceptions in decision-making and planning regarding security. There is always a need for the integration of widespread data insights into unified analyses. This study aimed to answer (1) how effectively we can utilize the crime rates and statistics, and incorporate community perceptions and (2) how promising these two ways of seeing the same phenomena are. For the data analysis, we chose four neighboring countries in Central Europe. We selected CECs, i.e., Hungary, Poland, Czech Republic, and Slovakia, known collectively as the Visegrád Group or V4. The data resources were administrative police statistics and ESS (European Social Survey) statistical datasets. The choice of this region helped us reduce variability in regional dynamics, regime changes, and social control practices.

Open Access: Yes

DOI: 10.3390/soc12060156

Evaluation of the HoloLens for Medical Applications Using 5G-connected Mobile Devices

Gyorgy Wersenyi

Publication Name: Infocommunications Journal

Publication Date: 2022-12-01

Volume: 14

Issue: 4

Page Range: 11-17

Description:

The updated range of models of smart glasses has expanded the availability of augmented reality (AR) technology in a way that opens them up to several applications. The first prototypes have been replaced by new models and vendors offer off-the-shelf solutions. E-health and medical applications have been in focus from the start. Furthermore, the roll-out of 5G technology would enable almost real-time, high-speed and low- latency communication, which would expand the potential uses and ideas. This paper gives a short overview of the current state, focusing on medical applications using smart glasses. The HoloLens glasses were evaluated regarding latency and data rates by using WiFi and the 5G campus network of the university. Results show that the HoloLens may be used in education, training and teleassistance; however, assisting latency-sensitive tasks that require a reliable network connection, ergonomic design, and privacy issues still remain a problem.

Open Access: Yes

DOI: 10.36244/ICJ.2022.4.2

Mamdani-type inference in fuzzy signature based rule bases

Katalin Tamás Laszlo T. Koczy

Publication Name: 8th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics Cinti 2007

Publication Date: 2007-12-01

Volume: Unknown

Issue: Unknown

Page Range: 513-525

Description:

The concept of fuzzy signatures might be useful when modeling complex, well structured problems, where one or several components of the structure are determined at a higher level by a sub-tree of other components. The data set belonging to the problem has an arbitrary structure, from which the structure of the data may slightly differ. An aggregation operator is given for each node, for the purpose of modifying the structure, so that data with missing components can be evaluated. Deducing a conclusion from an observation having such a structure is a key issue. In this paper fuzzy signature based rule bases will be introduced, then the generalisation of the well known Mamdani method for signature based rules will be shown step-by-step. Finally, an example of inference on fuzzy signatures will be discussed.

Open Access: Yes

DOI: DOI not available

Perspective of Created Value in Consumer Choice: Comparison of Economic and Ecological Dimensions

Jakub Kubiczek Bartłomiej Hadasik Dominika Krawczyńska Kornelia Przedworska Aleksandra Ryczko Erika Zsuzsanna Madarász

Publication Name: Sage Open

Publication Date: 2024-01-01

Volume: 14

Issue: 1

Page Range: Unknown

Description:

This paper aims to identify and categorize the factors influencing consumer goods’ value into ecological and economic dimensions and subsequently compare them. The analysis employs the Allegro Reviews (AR) dataset, comprising post-purchase product reviews, with a focus on a sample of 1,400 randomly selected reviews from a pool of 10,615 comments. Through this examination, distinct influencing factors are identified, categorized as either ecological or economic, and their frequency of reference in online reviews was compared. The research findings show that consumers consistently address economic dimensions in their reviews. Notably, emphasis is placed on goods’ quality, pricing, and the price-quality relationship. On the other hand, ecological aspects receive limited attention in reviews, suggesting their lesser significance to consumers compared to economic considerations. This study’s implications for theory and practice indicate that companies should prioritize economic aspects in their value creation endeavors, relegating ecological factors to a secondary role. However, from a global standpoint, enterprises must incorporate ecological dimensions during the value creation process to avert environmental degradation, which could otherwise undermine overall societal quality of life. In terms of originality and value, this research diverges from typical consumer choice studies that rely on questionnaires. Instead, it analyzes actual post-purchase product reviews, providing insights into tangible elements contributing to goods’ value, thus bypassing reliance on mere declarations. JEL Classification: D11, D12, L25, L26.

Open Access: Yes

DOI: 10.1177/21582440241238516

Discovery and Interactive Representation of the Dimensionless Parameter-Space of the Spring-Loaded Inverted Pendulum Model of Legged Locomotion Using Surface Interpolation

Ambrus Zelei Dóra Patkó Ábel Mihály Nagy

Publication Name: Springer Proceedings in Mathematics and Statistics

Publication Date: 2024-01-01

Volume: 454

Issue: Unknown

Page Range: 373-386

Description:

The spring-loaded inverted pendulum is a widely used model of legged locomotion. However, a complete map of the dimensionless parameter regions that correspond to the stable periodic solutions cannot be found in the literature. In this work, the three-dimensional space of two dimensionless physical parameters and the dimensionless total mechanical energy of the conservative system was discovered by means of numerical continuation. The fundament of the stability analysis of the piecewise-smooth system was provided by the numerical calculation of the fundamental solution matrices and the monodromy matrix. An effective iteration procedure based on the Nelder-Mead method is presented which tunes the model parameters in order to imitate the motion characteristics of specific animals and locomotion types such as running, trotting and galloping. The results are available online in the form of an interactive platform.

Open Access: Yes

DOI: 10.1007/978-3-031-56496-3_24