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Publications - 6278

On structural entropy and spatial filling factor analysis of colonoscopy pictures

Brigita Sziová János Pipek Szilvia Nagy

Publication Name: Entropy

Publication Date: 2019-03-01

Volume: 21

Issue: 3

Page Range: Unknown

Description:

Colonoscopy is the standard device for diagnosing colorectal cancer, which develops from little lesions on the bowel wall called polyps. The Rényi entropies-based structural entropy and spatial filling factor are two scale- and resolution-independent quantities that characterize the shape of a probability distribution with the help of characteristic curves of the structural entropy-spatial filling factor map. This alternative definition of structural entropy is easy to calculate, independent of the image resolution, and does not require the calculation of neighbor statistics, unlike the other graph-based structural entropies.The distant goal of this study was to help computer aided diagnosis in finding colorectal polyps by making the Rényi entropy based structural entropy more understood. The direct goal was to determine characteristic curves that can differentiate between polyps and other structure on the picture. After analyzing the distribution of colonoscopy picture color channels, the typical structures were modeled with simple geometrical functions and the structural entropy-spatial filling factor characteristic curves were determined for these model structures for various parameter sets. A colonoscopy image analying method, i.e., the line- or column-wise scanning of the picture, was also tested, with satisfactory matching of the characteristic curve and the image.

Open Access: Yes

DOI: 10.3390/e21030256

Scapula dyskinesis in medium-sized full-thickness rotator cuff tear after subacromial Lidocaine infiltration and rotator cuff reconstruction

Norbert Szakály Gábor Skaliczki Csenge A. Molnár Zoltán Nyőgér Tibor Gunther Anna Várnagy Tamás Terebessy

Publication Name: Journal of Experimental Orthopaedics

Publication Date: 2025-01-01

Volume: 12

Issue: 1

Page Range: Unknown

Description:

Purpose: In rotator cuff tears, scapular dyskinesis is often observed. The aim of our study is to better understand the cause and the role of scapular dyskinesis in rotator cuff tears and evaluate changes in scapulothoracic kinematics after Lidocaine subacromial injection and surgery in patients with medium-sized (1–3 cm) rotator cuff tear. Methods: The scapular motion during humerus sagittal flexion of nine healthy persons (healthy group, HG) and nine persons with a medium-sized rotator cuff tear (surgery group, SG) was investigated using the VICON motion capture system and upper limb evaluation in movement analysis software. In addition, quality of life and functional outcomes were assessed in the SG group using American Shoulder and Elbow Surgeons, Oxford and Constant-Murley scores and rotator muscle force and Visual Analogue Scale score were evaluated. The SG was further divided into three subgroups: measurements were performed preoperatively (before surgery native subgroup—BSN), then after subacromial Lidocaine injection (before surgery injection subgroup—BSI) and 6 months after rotator cuff reconstruction (after surgery subgroup—AS). Changes observed after injection (BSI) and surgery (AS) were compared to the BSN. Results: In the BSI, a significant reduction (p <.025) in protraction was observed in the raising phase between 20° and 70° comparing it to the BSN, protraction decreased by 5.3° ± 7.9° (mean ± standard deviation [SD]). In the lowering phase between 80° and 30°, we registered a decrease of protraction by 6.0° ± 8.3° (mean ± SD). In the AS, we observed an approximation of protraction to the HG, but no significant change was detected. Conclusion: Significant reduction in scapular protraction was demonstrated with Lidocaine subacromial injection during both the arm raising and lowering phases. Six months of rehabilitation treatment in the postoperative period is not enough to fully eliminate scapular dyskinesis. Level of Evidence: Level II.

Open Access: Yes

DOI: 10.1002/jeo2.70154

On the Impact of Magnetic Saturation on Incipient Itsc Fault Signal Detection in Pmsms Under Ev Transient Conditions

Adrienn Dineva Adam Zsuga

Publication Name: 2025 19th International Conference on Electrical Machines Drives and Power Systems Elma 2025 Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Incipient inter-turn short-circuit (ITSC) faults in permanent magnet synchronous machines (PMSMs) pose substantial diagnostic challenges, particularly under transient operating conditions common in electric vehicle (EV) applications. Traditional frequency-domain techniques, such as the Fast Fourier Transform (FFT), exhibit poor time-frequency resolution, making them ineffective for capturing non-stationary fault signatures. This study employs FEM-based numerical simulations combined with Continuous Wavelet Transform (CWT) analysis to accurately detect and localize ITSC fault characteristics under dynamic load conditions. While magnetic saturation is known to influence machine behavior, its quantitative impact on electrical fault signal amplitudes has not been explicitly addressed in previous diagnostic approaches. To fill this gap, a high-fidelity FEM simulation framework was developed, encompassing the full operational envelope of PMSMs. The results demonstrate that magnetic saturation leads to a notable attenuation-approximately 20-30% - of fault-induced current components, significantly complicating onboard detection. To the best of the authors' knowledge, such an integrated, EV-specific onboard diagnostic approach for incipient ITSC faults has not yet been reported in the literature. Although onboard thermal management systems exist, incipient ITSC faults may rapidly escalate into severe winding damage within 10 to 60 minutes under continuous load. This highlights the critical need for early detection methods robust to transient dynamics and magnetic nonlinearities.

Open Access: Yes

DOI: 10.1109/ELMA65795.2025.11083495

Energy management and hybrid energy storage in metro railcar

I. Szenasy

Publication Name: 2012 International Conference on Renewable Energy Research and Applications Icrera 2012

Publication Date: 2012-12-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

This paper focuses on the use of modeling and simulation one of renewable energy. © 2012 IEEE.

Open Access: Yes

DOI: 10.1109/ICRERA.2012.6477423

Carbon accounting measurement with digital non-financial corporate reporting and a comparison to european automotive companies statements

Cecília Szigeti Árpád Tóth Alex Suta

Publication Name: Energies

Publication Date: 2021-09-01

Volume: 14

Issue: 18

Page Range: Unknown

Description:

The regulatory environment for both sustainability and financial reporting is changing as standardisation and digital reporting (e.g., XBRL) are gaining traction within regulators. The measurement methodology and mandatory information content of disclosures are yet to be decided for corporate CO2 reporting by EU regulators and standard-setting organisations. In our study, we reviewed the sustainability reports of three leading German automotive groups by revenue for the period 2016–2020 as a case study. The research methodology was carried out with text-mining-aided content analysis to provide a collection of sustainability standards (GRI and SASB) in the evaluation of emissions reporting. As an addition to prior literature, conditions of relevance and clarity regarding published information were introduced in the evaluation process of compliance to CO2 disclosures. Companies by reporting practice were assigned to different stages of carbon management and actual emissions were evaluated. In the conclusions, discussion of the reliability of reported sustainability information, the applicability of digital reporting is provided through regional perspectives. We found that although analytical methods are available to assess the level of corporate carbon management, their usefulness is limited if the data are not reliable. Significant progress can be expected from analyses using standardised, comparable corporate carbon data.

Open Access: Yes

DOI: 10.3390/en14185607

Through the blurry looking glass-SDGs in the GRI reports

Cecília Szigeti Daniel Robert Szabo Áron Szennay Norbert Kovács

Publication Name: Resources

Publication Date: 2019-06-01

Volume: 8

Issue: 2

Page Range: Unknown

Description:

"Transforming our world: the 2030 Agenda for Sustainable Development" was agreed upon in 2015 by the global community and proposes 17 Sustainable Development Goals (SDG) for the period between 2015 and 2030. Since the greater integration of goals was an explicit claim, there are numerous overlaps among them. One of the novelties of the SDGs is that, in order to achieve the set goals, the Agenda 2030 addresses not only the states but the businesses as well. In our study, the relationships between the SDGs were analyzed on the base of the Global Reporting Initiative (GRI) indicators linked to the goals. The analysis was carried out by cluster analysis. Our results indicate that there is a strong relationship to be found among nine of the 17 SDGs. That relationship is mainly technical, which is caused by the number of aligned (genuine) GRI indicators. Though there are relationships between the SDGs as well, their strength is much weaker. According to our classification of SDGs, we suggest that the gap of business attention among SDGs is smaller than it is showed by KPMG.

Open Access: Yes

DOI: 10.3390/resources8020101

Interprofessional education in Hungary: developments and challenges.

Krisztina Kóbor

Publication Name: Journal of Interprofessional Care

Publication Date: 2009-12-01

Volume: 23

Issue: 5

Page Range: 523-525

Description:

No description provided

Open Access: Yes

DOI: 10.1080/13561820902921951

Synthesis and Techno-Economic Analysis of Pyrolysis-Oil-Based Biorefineries Using P-Graph

Botond Bertok Abid H. Tanzil Anamaria Paiva Pinheiro Pires Lina Martinez-Valencia István Heckl Juan C. García-Ojeda Ferenc Friedler Manuel Garcia-Perez Andres Argoti

Publication Name: Energy and Fuels

Publication Date: 2021-08-19

Volume: 35

Issue: 16

Page Range: 13159-13169

Description:

The production of renewable fuels and chemicals is a critical component of global strategies to reduce greenhouse gas emissions. In this regard, pyrolysis oil obtained from biomass comprises hundreds of chemical compounds, thus rendering it a good precursor for manufacturing a variety of fuel products of commercial interest. Despite the large number of contributions describing the products' extraction, upgrading, and potential refining schemes, no bio-oil refinery is currently in operation. The main challenge in building a bio-oil refinery lies in the lack of an economically viable process configuration. Systematic studies comparing alternative refinery concepts, or configurations, are needed to identify the most promising configuration. To the best of our knowledge, this study is the first to use process graph (P-graph) methodology for the synthesis of pyrolysis oil refineries. In particular, this work shows the effectiveness of P-graph methodology in simultaneously calculating the profitability of various biorefinery designs by using data reported in the literature and providing information on how the introduction of new technologies to the database will impact the formation of profitable biorefinery concepts. Our work demonstrates a methodology for the addition of new unit operations to the database generated from the literature. The addition of a centrifuge for water extraction and a wet oxidation system for acetic acid production resulted in the generation of 330 biorefinery configurations, seven of which have a profitability ranging from $1,650 to $23,666/h (USD) with acetic acid and levoglucosan as the main products, respectively. This demonstrates that P-graph methodology is useful for discovering optimum techno-economic scenarios that may otherwise be overlooked.

Open Access: Yes

DOI: 10.1021/acs.energyfuels.1c01299

Human Dignity in Hungary

István Kukorelli Gergely Deli

Publication Name: Handbook of Human Dignity in Europe

Publication Date: 2019-04-24

Volume: Unknown

Issue: Unknown

Page Range: 393-414

Description:

This chapter is intended to be a critical discussion of the interpretations of human dignity, as well as their changes, relevant for constitutional law in Hungary. The Fundamental Law of Hungary, in force since 1 January 2012, is characterized by a continuation of the previous constitutional situation but also by a departure from it. This is the reason why the analysis covers both the previous Constitution and the related jurisprudence of the Constitutional Court as well as the new Fundamental Law and its interpretation by the Court, in order to give a picture of the situation of human dignity in Hungary. In addition to a mere description, part of the survey will be devoted to the critical assessment of the situation. Thus, readers approaching the problem from a comparative perspective will not only find an overview of the legal text per se (law in books) and its interpretation (law in action) but may also learn about the views of some exponents of Hungarian legal scholarship.

Open Access: Yes

DOI: 10.1007/978-3-319-28082-0_17