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Found 6342 publications
Predictive hybrid scan-to-BIM method improves heritage building documentation completeness and accuracy
Publication Name: Scientific Reports
Publication Date: 2026-12-01
Volume: 16
Issue: 1
Page Range: Unknown
Description:
Incomplete survey data often undermines the reliability of Building Information Models (BIM), particularly for structures with restricted access and complex geometries. This study demonstrates a hybrid Scan-to-BIM workflow that integrates terrestrial laser scanning (TLS) and unmanned aerial vehicle (UAV) photogrammetry, supported by a predictive feasibility concept, to improve documentation accuracy and completeness. A two-phase strategy was validated on a chapel case study. Phase 1, combining TLS and ground-based photogrammetry, achieved only 54% coverage due to severe occlusions and limited scanner placement. These results led to the formulation of a Predictive Scan Feasibility Estimation Model (PSFEM), designed to generalize site-specific parameters such as scanner range, clearance angle, and building height into a decision-support tool for future surveys. Guided by the recognition of Phase 1 limitations, Phase 2 incorporated UAV photogrammetry and supplemental TLS, increasing coverage to 96%. Comparative analyses confirmed consistency in accuracy and improved geometric completeness. While the PSFEM was developed retrospectively based on the limitations identified in Phase 1, its analytical validation demonstrates the potential value of predictive planning for reducing redundant site visits and enhancing BIM reliability. The proposed framework provides a transferable basis for applying predictive hybrid workflows in both heritage and complex building documentation. This workflow offers a practical and scalable method for Scan-to-BIM documentation, applicable to heritage as well as other complex buildings, enabling high accuracy and completeness while effectively managing time and resources.
Open Access: Yes
CRUSHED STONE SUPPLY CHALLENGES FOR INFRASTRUCTURE DEVELOPMENT IN HUNGARY
Publication Name: Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu
Publication Date: 2024-01-01
Volume: Unknown
Issue: 6
Page Range: 28-37
Description:
The rapid expansion of Hungary’s infrastructure projects, especially in railway construction, has significantly increased the demand for crushed stone. Both national and EU-funded initiatives have strained supply chains, resulting in logistical challenges and material shortages. With limited domestic production capacity, efficient resource management is crucial to keeping projects on track. This paper evaluates Hungary’s supply chain for crushed stone, identifying key weaknesses and proposing solutions to enhance sustainability. Purpose. This study investigates the logistical and supply chain difficulties in delivering crushed stone for Hungary’s railway infrastructure projects. It evaluates current supply limitations, proposes ways to improve domestic resource management, and offers strategies to reduce reliance on imports while emphasizing sustainability. Methodology. The research applies Geographic Information System (GIS) modeling to analyze transportation routes for crushed stone, suggesting ways to streamline logistics. It examines the production capacities of Hungarian quarries, some producing 15,000–25,000 tons monthly, and assesses the impact of European and Hungarian regulations on material quality and availability. The potential for integrating recycled materials into the supply chain is also explored. Findings. Hungary’s domestic quarries cannot meet the high demand for railway ballast, estimated at 192,000 tons annually, leading to import reliance. GIS modeling shows optimized transportation routes could cut costs and carbon emissions. Incorporating smaller stone fractions and recycled materials could mitigate shortages, with recycled materials potentially comprising 40 % of railway ballast. Originality. By integrating geological, logistical, and regulatory insights, this paper provides novel approaches for addressing Hungary’s crushed stone supply chain challenges. The use of GIS modeling and recycled materials offers innovative solutions for reducing environmental impacts. Practical value. The findings present actionable strategies for improving Hungary’s supply chain efficiency, promoting recycling, and optimizing logistics. These solutions are applicable to Hungary and other regions facing similar infrastructure material supply challenges.
Open Access: Yes
Endogenous brassinosteroids in microalgae exposed to salt and low temperature stress
Publication Name: European Journal of Phycology
Publication Date: 2018-07-03
Volume: 53
Issue: 3
Page Range: 273-279
Description:
Brassinosteroids are part of the hormonal network that regulates growth processes and stress responses in plants. There is evidence for a similar hormonal network in microalgae. In the present study, six microalgae (Chlorococcum ellipsoideum, Gyoerffyana humicola, Nautococcus mamillatus, Acutodesmus acuminatus, Protococcus viridis and Chlorella vulgaris) were subjected to salt and low temperature stress with the addition of 36 g l–1 NaCl and transfer from 25°C to 15°C. There was a rapid response to salt stress with the brassinosteroid content (mainly castasterone with lower amounts of brassinolide, homocastasterone and typhasterol) increasing within 30 min of the salt treatment and remaining at these elevated levels after 7 h. The decrease in temperature had little effect on the brassinosteroid content. This was the first study to show that endogenous brassinosteroids increase in response to abiotic stress in a number of microalgae species.
Open Access: Yes
Verification of the Ramberg-Osgood material model in midas GTS NX with the modeling of torsional simple shear tests
Publication Name: Periodica Polytechnica Civil Engineering
Publication Date: 2018-05-22
Volume: 62
Issue: 3
Page Range: Unknown
Description:
This study focuses on the back analysis of a geotechnical laboratory test with nonlinear finite element modeling using the Ramberg-Osgood material model. This model has been used by several authors recently for nonlinear ground response analysis and it has been implemented by Midas into their commercial finite element code Midas GTS NX 2014. The verification of the model for 1D nonlinear site response analysis can be found in the documentation of the software package. In this study, Torsional Simple Shear tests were modeled and a comprehensive study was performed to provide verification of the material model for static torsional loading and axisymmetric conditions.
Open Access: Yes
DOI: 10.3311/PPci.11191
A survey of the influential factors of students' entrepreneurial career choice expectations
Publication Name: Tarsadalomkutatas
Publication Date: 2014-09-01
Volume: 32
Issue: 3
Page Range: 278-294
Description:
In this paper we investigate the effect of family background and institution background on career choice intentions of Hungarian students based on the database of GUESSS 2011 international survey. Models, attitudes, morals from home often exert significant influence on children's walk of life. Our research focuses on the strength of familial and institutional effects on students' career choice expectations. The novelty of our study is that we analyse the factors in the whole sample and in the following parts of sample: students with and without family business background. In the first part of this study we show the former researches conducted in this topic, after it we show the career intentions of the higher education students in Hungary. The main part of our study is the analyses of the influential factors of career choice expectations of Hungarian students.
Open Access: Yes
Design of Flat Loop Reactor with Bubble Column Circulation, Algae Growing Equipment
Publication Name: Strojnicky Casopis Journal of Mechanical Engineering
Publication Date: 2024-11-01
Volume: 74
Issue: 2
Page Range: 35-42
Description:
Based on the flow modeling and operational experience of the previous cylindrical loop reactor, we designed a sheet reactor combined with a loop reactor. The design with a cylindrical cross-section was applied to an equivalent cross-section (sheet) of several squares arranged next to each other. In accordance with the sedimentation processes experienced in the outlet branch, we created an algae trap, thereby reducing the flow to the level necessary for sedimentation. With this, I would like to achieve the already experienced, nearly 10-fold increase in algae concentration compared to the one in the mainstream.
Open Access: Yes
Hypergraph Formalism for Fuzzy Signature-Based Robot Environment Representation
Publication Name: Journal of Artificial Intelligence and Soft Computing Research
Publication Date: 2026-01-01
Volume: 16
Issue: 1
Page Range: 91-100
Description:
This paper introduces a pioneering approach to robot environment representation by integrating a novel hypergraph-based method for modeling fuzzy signatures with a quadtree-like structure for obstacle detection. By structuring fuzzy signatures through hypergraphs, we establish a robust framework that not only streamlines information representation but also simplifies the aggregation-based decision-making process. This synergy is applied to the domain of mobile robotics, where accurate and efficient environment representation is essential. Utilizing a quadtree-like structure for data organization, our technique systematically evaluates feature points against a set of fuzzy operations, determining the significance of obstacles and reconstructing the environmental model through the traversal of the quadtree-like structure. Furthermore, the hypergraph-based formalism sets the stage for a future transition to a tensor-based representation of fuzzy signatures, as envisioned in future work.
Open Access: Yes
Family-friendly workplaces in the public and private sectors
Publication Name: International Journal of Organizational Analysis
Publication Date: 2026-12-14
Volume: 34
Issue: 12
Page Range: 33-52
Description:
Purpose – The study aimed to examine family-friendly practices of employers in Hungary and compared public and private sector organisations to better understand their approaches to promoting the work–life balance of employees. Design/methodology/approach – A cross-sectional, quantitative survey was carried out between April and June 2023, involving 702 organisations certified as family-friendly workplaces in Hungary, of which 101 managers responded. The data were analysed using descriptive statistics and Pearson’s chi-squared tests to examine associations between sector and the prevalence of family-friendly practices. Findings – The findings indicate sectoral variation in the implementation of family-friendly practices. Private sector organisations more frequently reported flexible working arrangements, whereas public sector employers more often reported traditional measures such as childcare services and child-friendly work environments. Teleworking was available in 87.3% of private organisations, compared with 67.4% of public organisations (p = 0.016). Similarly, part-time work was offered by 87.3% of private organisations and 63.3% of public organisations (p = 0.004). Conversely, on-site childcare (52.2% vs. 21.8%, p = 0.002) and child-friendly workplaces (58.7% vs 23.6%, p < 0.001) were more prevalent in the public sector. Research limitations/implications – The study is geographically limited to Hungary and focuses mainly on certified family-friendly workplaces, which may not represent all organisations uniformly. However, it provides a basis for benchmarking international research on family-friendly workplace policies. In addition, it does not include a qualitative study to provide more in-depth insight or to capture the views of employees, but identifies further research directions in this way. Practical implications – Based on these findings, organisations should consider implementing family-friendly policies that better promote work–life balance. The study recommends that the public sector extend flexible working arrangements and increase family benefits to improve recruitment and retention. Conversely, private sector employers should focus on developing childcare facilities on-site and fostering family-friendly work environments to support their employees’ needs effectively, thereby increasing job satisfaction. Social implications – A better understanding of family-friendly workplace policies can help to raise awareness of the importance of promoting work–life balance. The implementation of these policies has the potential to improve the well-being of employees and contribute to wider societal goals, including gender equality, family stability and the development of a more sustainable society. Originality/value – The study provides a comprehensive analysis of family-friendly workplace policies in the various sectors in Hungary, highlighting sectoral strategies and practical recommendations for better promoting work–life balance and organisational efficiency.
Open Access: Yes
Evaluation of the aggregation capability of the mpt network layer multipath communication library and multipath TCP
Publication Name: Acta Polytechnica Hungarica
Publication Date: 2019-01-01
Volume: 16
Issue: 6
Page Range: 129-147
Description:
Multipath communication techniques can bring in a new era for Cognitive Infocommunication, due to ensuring resilient and high-speed data transfer. In this paper, we evaluated the MPT network layer multipath communication library, which creates an UDP tunnel, based on the GRE in UDP tunnel protocol. We compared the aggregation capability of MPT to that of MPTCP, which stands for Multi-Path TCP and based on TCP sub-flows to aggregate the transmission capacities of different physical interfaces and their potentially disjoint paths to ensure high network throughput. In this article, we used 100 Mbps and 1 Gbps speed channels to compare the aggregation capabilities of these two different multipath communication solutions. We used several scenarios for the evaluation. We tested both IPv4 and IPv6 both as underlying and as encapsulation protocols. We used several channels up to 12 to evaluate the aggregation capabilities with the industry standard iperf tool, even with different numbers of iperf threads. Meanwhile we measured the CPU usage of the two examined multipath technologies to get further insight into their operation. On the basis of our measurement results, we also set up a mathematical model of their channel aggregation capabilities.
Open Access: Yes
