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Found 6289 publications

Plastic Limited Numerical Modelling on Contact Friction Effects of Steel–Concrete Connection for Composite Bridges

Oveys Ghodousian János Szép Marco Domaneschi Majid Movahedi Rad Raffaele Cucuzza Daniel Gosztola

Publication Name: Buildings

Publication Date: 2024-09-01

Volume: 14

Issue: 9

Page Range: Unknown

Description:

This research employs plastic limit analysis to examine load combinations, contact interactions, and friction effects on steel–concrete connections. A nonlinear finite element model was developed using ABAQUS 2021, incorporating the concrete damage plasticity model and contact friction interactions. The model’s validity was confirmed through laboratory experiments. Results indicate that contact elements and friction between the top flange, concrete slab, and studs significantly influence structural behavior. Unlike conventional push-out tests, real deck–slab connections exhibit different load-displacement responses due to the self-weight and additional loads, such as vehicular traffic. Under horizontal loading, extensive failures with large deformations along the studs occur, while vertically compressive loads lead to failures around the connections.

Open Access: Yes

DOI: 10.3390/buildings14092898

Storage Location Assignment in Indirect-Access Storage Systems

Tamás Hartványi Zoltan Andras Nagy Miklós Szabó

Publication Name: Lecture Notes in Logistics

Publication Date: 2024-01-01

Volume: Part F3450

Issue: Unknown

Page Range: 172-185

Description:

A common solution in warehouses is to provide direct access to products due to various service policies. The construction of such warehouses is quite expensive due to the extensive service roads required, but at the same time, in accordance with the Pareto principle, most of the variety of materials does not justify the provision of direct access. We believe that similar dynamics could be achieved on a smaller area with the right operation of an indirect access storage system, as if direct access were provided to all stored units. Meanwhile, the high variety of products and the low accessibility make it a challenge in selecting and implementing the right operation method. The efficiency is influenced by the layout of the warehouse, the assignment of stored units to storage locations, and the operating processes. We conducted simulations to examine these; the results will be presented here. The design of the warehouse and the stochastic material flow was not changed during the examinations; the initial arrangements of the stored materials and the procedures for their movement were built according to several aspects. This revealed how these factors affect efficiency, the computational capacity needed, and the mutual influence they exert.

Open Access: Yes

DOI: 10.1007/978-3-031-70977-7_10

CSR and workplace autonomy as enablers of workplace innovation in SMEs through employees: Extending the boundary conditions of self-determination theory

Laszlo Vasa Susana Álvarez-Otero Jacob Cherian Ubaldo Comite Muhammad Safdar Sial Beili Li Xu Fan Muhammad Safdar Sial

Publication Name: Sustainability Switzerland

Publication Date: 2021-06-01

Volume: 13

Issue: 11

Page Range: Unknown

Description:

The current business environment characterized by high uncertainty, volatility, and stiff situation of competitiveness that is evident in almost every sector has increased the importance of workplace innovation for contemporary businesses. In this regard, a considerable attention in realizing employees of an organization as a source of innovation is not evident from the existing literature. In this aspect, the current study is an attempt to foster workplace innovation through employees in the SME sector of an emerging economy. In doing so, the authors propose that corporate social responsibility (CSR) initiatives of an SME, along with workplace autonomy, are helpful in creating an environment at the workplace that fosters innovative employee behavior (IEB). Furthermore, the current study also extends the boundary condition of the theory of self-determination by arguing that this theory provides a comprehensive framework to explain employees’ motivation for workplace innovation. The data of the current survey was obtained from the SME sector situated in two large cities of a developing country through a self-administered questionnaire which was then analyzed through structural-equation-modeling (SEM) using the AMOS software. The results confirmed that CSR directly relates to IEB and workplace autonomy mediates this relationship. The study also discusses the implications of this survey for theory and practice.

Open Access: Yes

DOI: 10.3390/su13116104

Delay propagation in a real life railway network controlled by a fuzzy logic rule base

Tibor Héray Gabor Rozsa Márk Farkas László T. Kóczy

Publication Name: 10th International Symposium of Hungarian Researchers on Computational Intelligence and Informatics Cinti 2009

Publication Date: 2009-12-01

Volume: Unknown

Issue: Unknown

Page Range: 423-433

Description:

This paper considers a real-life railway timetable related problem, where a set of interconnected railway junction points form a railway network, which is essentially a directed graph with corresponding vertex and edge capacities representing railway tracks and railway platforms.The dynamic behavior of this model is driven by a timetable. Unforeseen weather and other external effects may contribute to delays in the timetable, which alters the behavior of the whole system. In this scenario a hierarchical fuzzy system is proposed that can suggest a possible outgoing delay for each train by evaluating a set of fuzzy rule bases using two input data. The first proposal does not take into account the possible propagation of delay in the whole railway network. In this article a negative feedback is applied on the hierarchical fuzzy system.The fuzzy sets are optimized by an evolution based global search metaheuristics.

Open Access: Yes

DOI: DOI not available

Multi TP model transformation for functions with different numbers of variables

Péter Baranyi

Publication Name: 8th IEEE International Conference on Cognitive Infocommunications Coginfocom 2017 Proceedings

Publication Date: 2017-07-02

Volume: 2018-January

Issue: Unknown

Page Range: Unknown

Description:

Models in the cognitive sciences and AI are typically based on heuristic combinations of soft computing methods - including fuzzy approaches, neural networks and others. It is often difficult, if not completely intractable to apply operations between such models, as they are usually given in different mathematical representations or using different frameworks that may or may not be suitable for their unification. This paper focuses on the TP model transformation, which plays an important role in transforming various model representations to a unified form that fits well with formalised mathematical design concepts. The novelty of the paper is a new extension of the TP model transformation that is capable of transforming a set of models with a different number of inputs. This is in contrast to previous solutions, in which the requirement for all models to have the same number of inputs was a strong limitation.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2017.8268287

Colistin residues and colistin-resistant Enterobacteriaceae in agricultural soils: Sources, risks, and remediation strategies

E. Lakatos Babett Greff Miklós Posgay László Varga

Publication Name: Environmental Research

Publication Date: 2026-03-01

Volume: 294

Issue: Unknown

Page Range: Unknown

Description:

Polymyxins, including colistin, are critical last-line antibiotics, and their environmental dissemination raises One Health concerns. This review synthesizes current evidence on the occurrence, sources, environmental fate, and mitigation of colistin residues and colistin-resistant Enterobacteriaceae in agricultural soils, with emphasis on transmission pathways to crops and implications for food safety along the farm-to-fork continuum. Principal inputs from livestock manure, reclaimed wastewater, and wildlife are characterized. Resistance mechanisms, with a focus on plasmid-mediated mobile colistin resistance (mcr), are summarized. Although animal manure may be a significant source of colistin due to its low gastrointestinal absorption, soil concentrations are low, with bioavailability influenced by physicochemical parameters, including pH, clay content, cation exchange capacity, and organic matter content. Low desorption rates limit plant uptake; thus, the primary environmental risk arises from the selection and enrichment of colistin-resistant bacteria and mcr genes in the rhizosphere, as well as splash-mediated deposition of contaminated particles. In farm and arable soils, mcr-1 and mcr-3 have been identified as the dominant variants, with higher prevalence in livestock-associated environments. Their dissemination is primarily driven by horizontal gene transfer rather than clonal expansion, influenced by factors such as soil characteristics, heavy metals, soil treatments, and plant root exudates. Interventions are critically appraised, spanning veterinary stewardship and on-farm hygiene, physical processes, chemical approaches, and biological strategies, along with postharvest barriers that include Good Agricultural Practices and Hazard Analysis and Critical Control Points, washing and sanitization, and bacteriophage biocontrol. Major conclusions are that multi-barrier, context-specific programs can reduce environmental selective pressures and interrupt gene flow while maintaining agronomic viability, yet progress remains constrained by gaps in standardized surveillance (particularly for plant-based foods), and by the limited use of quantitative risk assessment and field-scale validation of remediation technologies. A One Health framework that integrates environmental monitoring with public-health endpoints is needed to guide proportionate policy and practice.

Open Access: Yes

DOI: 10.1016/j.envres.2026.123771

Cognitive and spiritual revolution of the tenth century - Constantine porphyrogenitus and his hidden world: Part II. the Great Monarch's hidden world in the great medieval artistic works

Peter Varlaki Péter Baranyi

Publication Name: 8th IEEE International Conference on Cognitive Infocommunications Coginfocom 2017 Proceedings

Publication Date: 2017-07-02

Volume: 2018-January

Issue: Unknown

Page Range: Unknown

Description:

The paper discusses, through a comparative hermeneutical microanalysis, identical and very similar representational (iconographic) and meaning systems of such great medieval art-works as the Limburg Staurotheke, Orthodox Metal Icons and the 'Archangel enamel pictures' of the Holy Crown of St Stephen of Hungary. The basis of the comparison is the discussed hidden mystical writings of the Great Monarch in part I of the paper.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2017.8268294

Optimization of strategic level performance measurement and decision making using artificial neural network

János Botzheim Peter Foldesi Csaba Tápler P. Németh

Publication Name: 2012 IEEE International Technology Management Conference Itmc 2012

Publication Date: 2012-11-01

Volume: Unknown

Issue: Unknown

Page Range: 93-97

Description:

In our paper we propose a new method for the strategic level performance measurement and decision making by presenting two case studies performed in 2011. We proposed a computational intelligence method to establish connection between basic operational level data and important strategic level indicators. In the first case study this indicator is related to performance measurement. In the second case study the indicator is the contribution margin of the given company. After the introduction we present the process of programming and learning with actual company data. Finally an evaluation of the results is presented based on the program runs. © 2012 IEEE.

Open Access: Yes

DOI: 10.1109/ITMC.2012.6306360

Local Binary Pattern-Based Fingerprint Matching

Peter Foldesi Boldizsar Tuu-Szabo Gabor Kovacs László T. Kóczy Szilvia Nagy

Publication Name: Studies in Computational Intelligence

Publication Date: 2022-01-01

Volume: 959

Issue: Unknown

Page Range: 183-188

Description:

In this paper we propose an image-based fingerprint recognition system. The method is based on Local Binary Pattern features extracted from the region of the fingerprint image around the core point. The experiments on the FVC2002 fingerprint databases show the effectiveness of the proposed approach.

Open Access: Yes

DOI: 10.1007/978-3-030-74970-5_21