Search Everything

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

Publications - 6374

Handheld 3D Scanning and Image Processing for Printing Body Parts - A Workflow Concept and Current Results

Anna Sudar Gyorgy Wersenyi Thomas Wittenberg

Publication Name: 2022 IEEE 1st International Conference on Internet of Digital Reality Iod 2022

Publication Date: 2022-01-01

Volume: Unknown

Issue: Unknown

Page Range: 61-68

Description:

The combination of current technical possibilities of handheld 3D scanning devices, 3D data analysis and interaction, and novel 3D bioprinting technologies has opened the way to develop workflows and scenarios for the generation of personalized human prosthesis. Specifically, using the human ear as one example to develop a cost-effective chain of methods and tools, the above mentioned combined and interacting technologies can be used to understand and demonstrate the possibilities for rapid bio prototyping. Production workflows for personalized soft-material bio-prosthesis gain significance in reconstructive and plastic surgery. This paper introduces a workflow concept, presents a list of appropriate and accessible state-of-the-art handheld scanners, followed by an image processing solution based on the MeshLab application and printing first prototypes.

Open Access: Yes

DOI: 10.1109/IoD55468.2022.9987113

Fourier Analysis of the Nonlinearity of Surface-Relief Optical Transmission Gratings of Quasi-Sinusoidal Profile Fabricated in Optical Glasses and Crystals by Carbon, Nitrogen and Oxygen Ion Microbeams

Gyula Nagy István Rajta Vladimir Havránek István Bányász Robert Magnusson

Publication Name: Photonics

Publication Date: 2025-10-01

Volume: 12

Issue: 10

Page Range: Unknown

Description:

Optical transmission gratings with quasi-sinusoidal surface-relief profiles were inscribed in IOG and Pyrex glasses and in Bi12GeO20, Er: LiNbO3, and Er: Fe: LiNbO3 crystals by microbeams of carbon, nitrogen, and oxygen ions at ion energies of 5, 6, and 10.5 MeV. Grating constants were 4, 8, and 16 μm. Amplitudes of the surface-relief gratings were in the 10–2000 nm range. The diffraction efficiency of the gratings was measured at a wavelength of 640 nm. Maximum diffraction efficiencies were close to the theoretical maximum of 33% for thin gratings. Grating profiles were measured by optical microscopic profilometry. Measurement of the diffraction efficiencies at higher orders and Fourier analysis of the grating profiles revealed the dependence of the residual nonlinearity of the grating profiles on the implanted ion fluence. The ion microbeam-written gratings can be used as light coupling elements in integrated optics for sensors and telecommunication.

Open Access: Yes

DOI: 10.3390/photonics12100978

Varieties of capitalism and sustainability reporting: Text analysis-based evidence on European companies

Árpád Tóth Alex Suta Zétény Limbach

Publication Name: Sustainable Futures

Publication Date: 2026-06-01

Volume: 11

Issue: Unknown

Page Range: Unknown

Description:

Sustainability reporting has become a crucial tool for global corporations to disclose environmental, social, and governance (ESG) aspects. This paper examines how corporate sustainability reporting depth varies with firm financial characteristics and with the institutional diversity of European economic systems. Companies are classified using the Varieties of Capitalism (VoC) framework, accounting for the economic differences represented by distinct capitalism models. The quantitative design applies dictionary-based text mining to 2022 and 2023 sustainability reports, using ESRS-aligned scoring to measure disclosure breadth and topic coverage. The sample includes the 20 highest-revenue firms from each VoC group. WordStat-based text analytics generate ESRS topic scores and link disclosure outcomes to firm size, profitability, and leverage. Results indicate systematic cross-VoC differences in ESRS coverage, with higher median disclosure breadth in Social-Democrat Economies (SDE) and Mediterranean Capitalism (MED) settings, thinner coverage more common in Continental European Capitalism (CEC) and Eastern and Central European Capitalism (EAST) settings, and Liberal Market Economies (LME) typically occupying an intermediate position. Regression evidence identifies firm size as the most consistent positive determinant of disclosure breadth, while profitability shows weaker or inconsistent associations and leverage is more often linked to thinner environmental coverage. Findings imply that achieving ESRS comparability across Europe require not only harmonized standards but also institution-sensitive implementation and enforcement capable of reducing persistent cross-country differences in disclosure depth.

Open Access: Yes

DOI: 10.1016/j.sftr.2026.101865

Induced OWA Operators in Neutrosophic Environment Applied in the Economic Assessment of Southeast Asian Countries

Jose M. Merigó Dragan Pamucar Muhammad Saqlain

Publication Name: Operations Research Forum

Publication Date: 2026-06-01

Volume: 7

Issue: 2

Page Range: Unknown

Description:

The ordered weighted averaging (OWA) operator is a fundamental tool in decision-making processes, particularly under conditions of uncertainty, by aggregating inputs through a reordering mechanism based on predefined weights. Despite its utility, the classical OWA operator is limited in addressing complex decision scenarios characterized by uncertainty, indeterminacy, and inconsistency. This study introduces two innovative aggregation operators, the induced ordered weighted averaging operator under a neutrosophic environment (IOWAN) and its generalized form (GIOWAN), which integrate the ordering flexibility of induced OWA with the expressive power of neutrosophic sets. The proposed operators advance existing models by (i) enabling simultaneous aggregation of truth, indeterminacy, and falsity information, (ii) incorporating application-driven inducing functions for dynamic ordering, and (iii) offering a unified framework encompassing arithmetic, geometric, harmonic, quadratic, and extreme-case induced operators. We formally define the operators, establish their mathematical properties, and present several novel extensions, including interval-valued, bipolar, probabilistic, entropy-based, and time-dynamic neutrosophic versions. An illustrative case study of the economic assessment of Southeast Asian countries was performed using a methodology based on (GIOWAN) Operators and results show that rankings align with real-world economic data. Comparative analyses highlight its superior performance in modeling intricate decision dynamics. The proposed algorithms are effective in a group decision-making environment within uncertain domains, solving problems of uncertainty, complexity, and multidimensional information, including sustainable development, policy formulation, and healthcare decision analysis.

Open Access: Yes

DOI: 10.1007/s43069-026-00615-4

Legislation of forensic DNA analysis in Hungary - past, present and future

Mónika Nogel Andras Czebe Gabor Kovacs Zsolt Pádár

Publication Name: Forensic Science International Genetics Supplement Series

Publication Date: 2019-12-01

Volume: 7

Issue: 1

Page Range: 604-606

Description:

Ever since the first application of DNA analysis in criminal casework in 1992, the conditions under which forensic DNA analysis is performed within the Hungarian law have been developed and subsequently approved, in parallel with the establishment of a national database report of forensic DNA. Act XLVII of 2009 (on the Criminal Records System, on the Records of EU Member State Court Rulings against Hungarian Citizens as well as on the Records of Biometric Criminal and Law Enforcement Data) constituted the legal framework for this. Moreover, Act XXIX of 2016 (on Judicial Experts), Act CXII of 2011 (on the Right of Informational Self-Determination and on Freedom of Information), as well as Regulation 12/2016. (V.4.) of the Minister of Interior (on Rules of Taking Fingerprints, Palm prints, Photographs and DNA samples), as well as the Provisions of 31/2008. (XII. 31.) of the Minister of Local Government (on the work of forensic experts, respectively) went on to specify the professional requirements necessary for forensic DNA analysis. The regulations of the EU must also be taken into consideration. Of particular significance, are the escalations undertaken by the EU for the purpose of combating transnational crime as developed in the Prüm Treaty, and, under Council Decision 2008/615/JHA and Council Decision 2008/616/JHA, became ratified into its partial transformation into an EU-wide tool for cooperation. The General Data Protection Regulation (GDPR) has also introduced a new and seemingly far-reaching exemption to the general prohibitive conditions applied to the processing of genetic data. The question of whether, and which kind of, consent is required remains left to other applicable EU and national laws. The aim of this study is to provide an overview on how Hungarian legislation of forensic DNA has changed over the past 27 years, to illustrate the current legal context in addition to providing a conceptual theoretical framework for future legislation, including the rules of forensic DNA typing and legal regulation connected to DNA-databases.

Open Access: Yes

DOI: 10.1016/j.fsigss.2019.10.107

Vector hysteresis measurement and simulation

Miklós Kuczmann

Publication Name: Przeglad Elektrotechniczny

Publication Date: 2009-12-01

Volume: 85

Issue: 12

Page Range: 92-95

Description:

The paper presents a Preisach model of hysteresis to simulate the vector hysteresis properties of ferromagnetic materials. The vector behavior has been studied using a single sheet tester with a round shaped specimen at low frequency, and the magnetic flux density vector has been controlled. An inverse vector Preisach hysteresis model has been developed and identified by applying the measured data. Finally, the inverse model has been inserted into a finite element procedure to study numerically the measurement system.

Open Access: Yes

DOI: DOI not available

Origmatrachys tchecpoensis sp. nov.: the second species of the genus Origmatrachys in Africa and the first representative of the family Trachyuropodidae in Togo (Acari: Uropodina)

Sergey G. Ermilov Jenő Kontschán

Publication Name: International Journal of Acarology

Publication Date: 2025-01-01

Volume: 51

Issue: 3

Page Range: 216-221

Description:

The herein described new species, Origmatrachys tchecpoensissp. nov. is the second representative of the genus Origmatrachys in Africa, and it is the first record of the family Trachyuropodidae in Togo. The new species differs from the already described Afrotropical Origmatrachys in the absence of a network of strongly sclerotized grooves on the dorsal and ventral shields and in the sculptural pattern of the female genital shield. A new list of the African Trachyuropodidae is also presented. http://www.zoobank.org/urn:lsid:zoobank.org:pub:D1138A5E-2927-4DD3-890D-AD5A84495102 http://www.zoobank.org/urn:lsid:zoobank.org:act:25A8F54D-7B4E-4F2B-A2B3-FA5E92826036.

Open Access: Yes

DOI: 10.1080/01647954.2025.2479552

Susceptibility mapping for land subsidence and collapsed pipes in north-east Iran

Adel Sepehr Mehran Rezaei Rashti Narges Kariminejad Vahid Shafaie

Publication Name: Advanced Tools for Studying Soil Erosion Processes Erosion Modelling Soil Redistribution Rates Advanced Analysis and Artificial Intelligence

Publication Date: 2024-01-01

Volume: Unknown

Issue: Unknown

Page Range: 579-594

Description:

Land subsidence and collapsed pipes are considered among geomorphological hazards, causing significant damages annually in the form of direct and indirect costs. These hazards lead to notable changes in the landscape, land degradation, soil and water losses, and regional erosion and sedimentation. Consequently, the effective management of these hazards and the determination of relationships between their environmental factors for quantitative susceptibility assessment are of utmost importance. A trustworthy evaluation depends on the quality of available data and the selection of appropriate analytical and modeling methods. Given that no comprehensive study on land subsidence and collapsed pipes in Razavi Khorasan Province has been conducted so far and considering that the land degradation resulting from plain land subsidence and collapsed pipes are among the primary threatening hazards for the country and the province, particularly in recent years, the use of proper analytical and modeling methods for comprehensive and integrated management seems essential. This research was conducted using high-resolution satellite imagery in Razavi Khorasan Province. In this study, topographical and hydrological feature maps were prepared using a digital elevation model based on the boundaries of Razavi Khorasan Province. Physical and chemical tests were conducted on 624 soil samples collected throughout the province, and their raster maps were produced. Data pertaining to vegetation cover, land use maps, geology, and regional precipitation were also prepared and used as inputs for the models. The spatial locations of land subsidence and collapsed pipes across the province were identified in subsequent phases. Following this, using statistical and data mining methods, spatial modeling of the land subsidence and collapsed pipes was performed, and the best regional model for their evaluation was chosen. The AUC numerical value for both the support vector machine (SVM) and maximum entropy (ME) models ranges between 0.8 and 0.9, indicating an excellent evaluation of the models used in zoning the land subsidence. Ultimately, the ability to recognize the behavior and formation conditions of these hazards, to identify areas with greater susceptibility, to present a risk management model for land subsidence and collapsed pipes, and to distinguish critical and susceptible areas for land subsidence and collapsed pipes, along with their control methods, was provided. Notably, the SVM algorithm demonstrated superior efficacy in this study. The insights derived from identifying erosional structures of collapsed pipes and land subsidence and understanding their spatial interrelationships offer a robust foundation for devising timely and strategic management interventions in affected domains.

Open Access: Yes

DOI: 10.1016/B978-0-443-22262-7.00010-2

Effect of Maleated Compatibilizer on the Mechanical Properties of PLA/Mustard Waste Biocomposites

László Lendvai Tej Singh Sándor K. Jakab

Publication Name: Chemical Engineering Transactions

Publication Date: 2024-01-01

Volume: 114

Issue: Unknown

Page Range: 775-780

Description:

Natural fiber polymer composites of biodegradable poly(lactic acid) (PLA) and mustard waste were fabricated with the addition of various amounts (0.25-2.00 wt.%) of maleic anhydride grafted PLA (PLA-g-MA), which was used as a coupling agent to improve interfacial adhesion between the components and thereby enhance the mechanical features of the biocomposite. PLA-g-MA was synthesized in-house by reactive melt grafting using dicumyl peroxide as a free grafting initiator. Preparation of the biocomposite samples was carried out using a twin screw extruder and an injection molding machine. The effect of PLA-g-MA concentration on the samples’ mechanical traits and surface hardness was investigated. Mechanical properties were determined using uniaxial tensile tests, flexural tests, and Charpy impact tests; additionally, the surface hardness was tested with a Shore D indenter. The tensile tests revealed that even the lowest amount (0.25 wt.%) of PLA-g-MA was sufficient to effectively improve the interfacial adhesion between PLA and mustard waste, as manifested in an increased tensile strength (34 to 39 MPa). Similarly, the flexural and the Charpy impact strength also exceeded that of neat PLA/mustard waste biocomposite by 31 % and 45 %, respectively. The addition of compatibilizer in higher concentrations than 0.25 wt.% did not improve the mechanical properties further, ascribed to the excess PLA-g-MA plasticizing the composite. Based on Shore D testing, the compatibilization did not affect the surface hardness of the biocomposites significantly.

Open Access: Yes

DOI: 10.3303/CET24114130