Search in Publications

Found 6383 publications

Twin concept of fine structure constant as the 'self number-archetype' in perspective of the Pauli-Jung correspondence

Peter Varlaki Imre J. Rudas

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2009-12-01

Volume: 6

Issue: 2

Page Range: 77-108

Description:

The paper-similarly to our earlier publications since 1993 - is trying to 'synchronize' early quantum physics, the Kalmanian representation theory, Jungian analytic psychology, and certain aesthetical categories. The number '137', the so-called inverse Fine Structure Constant (IFSC), is placed at the centre of this heuristic and epistemological experiment, along with the scientific cooperation of Pauli and Jung. A new possibilistic twin concept of "controlling-observing equations" is proposed for the reinterpretation of the FSC and other Number Archetypes on the basis of the Hermeneutic and symbolic languages found in the W. Pauli and C. G. Jung " Correspondence". The first part of the paper deals in first line with the introduction of the possibilistic twin concept of FSC together with its interpretation according to the hermeneutical "tradition" of the Pauli-Jung collaboration.

Open Access: Yes

DOI: DOI not available

Foreign direct investment and shadow economy: One-way effect or multiple-way causality?

Laszlo Vasa Wojciech Cieśliński Inna Tiutiunyk Andrii Zolkover

Publication Name: Journal of International Studies

Publication Date: 2022-01-01

Volume: 15

Issue: 4

Page Range: 196-212

Description:

The article examines the relationship between the size of the shadow economy and indicators of the investment market development. Net inflow of foreign direct investments, volume of net investments in non-financial assets, volumes of portfolio investments, and net outflow of foreign direct investment were used as parameters characterizing the development of the investment market. The dependence between the indicators was analyzed using the regression equation, Shapiro-Wilk test. Research results demonstrate that the increase in the inflow and outflow of foreign direct investments leads to an increase in the size of the shadow economy without a time lag in Ukraine, Poland, Slovenia, Romania, Croatia, Lithuania, Latvia, Estonia, and with a time lag of 1 year in Slovakia and Hungary. The largest impact on the size of the shadow economy is made by the volume of inflow and outflow of direct foreign investments, while the volume of portfolio investments has a less significant effect. Consequently, it was concluded that the processes of inflow and outflow of direct foreign investments require enhanced control by specialized state executive bodies given the scale of their potential destabilizing impact on the macroeconomic stability of the country.

Open Access: Yes

DOI: 10.14254/2071-8330.2022/15-4/12

Financing football players’ careers from Africa to Europe: Does it follow a pecking order?

Joseph Ato Forson Ellis Kofi Akwaa-Sekyi Ernest Yeboah Acheampong Ralph Frimpong Fiona Soraya Addai-Sundiata Attila Szabo

Publication Name: Sport Business and Management an International Journal

Publication Date: 2025-11-24

Volume: 15

Issue: 6

Page Range: 657-684

Description:

Purpose – This study examines how professional African footballers finance their international careers and proposes an equitable model for distributing earnings among contributors, using the pecking order theory (POT) as a guiding framework. It seeks to determine whether players’ financing behaviour follows a pecking order and how earnings can be fairly shared among stakeholders to reduce conflict. Design/methodology/approach – Employing a mixed-methods design, the study draws on in-depth interviews with 36 African footballers from across the CAF zones who have played in over 30 professional leagues in UEFA countries. Primary qualitative data is supported by secondary sources, including player profiles, media reports, club websites and academic publications. Findings – The findings reveal that financing players’ careers in Africa follows a pecking order. Footballers initially rely on cheap internal financing sources (family and personal efforts) before turning to external, debt-like and equity-based support (community sponsors, local managers and agents) to pursue professional opportunities abroad. The study proposes a tripartite model for earnings distribution, allocating proportional returns to family, debt contributors and equity stakeholders, based on timing, risk and level of support. This addresses the financing gap and offers a practical solution to disputes over financial entitlements. Originality/value – This research is among the first to systematically apply POT to athlete financing in Africa and propose a model that reflects the informal yet critical roles played by non-institutional actors. By drawing parallels with startup financing, it contributes new theoretical and policy insights into sports migration, career development and conflict resolution in football. It also sets an agenda for further research into athlete financing in other sports and developing regions.

Open Access: Yes

DOI: 10.1108/SBM-01-2025-0006

Discrete element modeling of the effect of real-shape ballast angularity on sleeper lateral resistance

Richárd Nagy Majid Movahedi Rad Jafar Chalabii

Publication Name: Scientific Reports

Publication Date: 2026-12-01

Volume: 16

Issue: 1

Page Range: Unknown

Description:

The mechanical behavior of railroad trackbeds, especially their lateral resistance under dynamic train loads, is significantly influenced by ballast angularity. Using simulations using the Discrete Element Method and realistic particle geometries acquired through 3D scanning, this study examines the function of ballast particle angularity. An Artec Space Spider was used to scan and import five ballast samples into PFC3D, each of which had a unique size distribution and angularity index. To simulate a Single Tie Push Test, a B70 concrete sleeper, which is frequently found in European tracks, was modelled and put through lateral loading. Results for the standard No. 24 ballast gradation were compared with experimental data to validate the simulation framework, and the results indicated a high degree of agreement in the lateral force–displacement behavior. By examining changes in the particle size distribution, ballast degradation was measured, and the resulting Ballast Breakage Index and Breakage Ratio were calculated. Using accepted techniques, lateral resistance was calculated as the area under the displacement curve at 3.5 mm. According to the results, samples with more angular particles had lower degradation and higher lateral resistance. The importance of angularity in stabilising ballast layers under lateral loads was validated by regression analysis. These results offer guidance for better ballast selection and maintenance practices in the field of railway engineering.

Open Access: Yes

DOI: 10.1038/s41598-025-31965-4

On Metrics Used in Colonoscopy Image Processing for Detection of Colorectal Polyps

Raneem Ismail Szilvia Nagy

Publication Name: Smart Innovation Systems and Technologies

Publication Date: 2021-01-01

Volume: 216

Issue: Unknown

Page Range: 137-151

Description:

Colorectal cancer is nowadays the fourth cause of cancer death worldwide. Prevention of colorectal cancer by detection and removal of early stage lesions is of essential importance and has become a public health challenge worldwide. As the screening is carried out mainly by some sort of endoscope, and the endoscopic image processing is an important area of research and development, it is essential to know what kind of measures are used in determining whether polyp finding hit rates or miss rates are acceptable. It is rather natural to match the hit rate measures to the method itself; thus, in this contribution, the most typical polyp detecting methods are summarized shortly together with the metrics they use for evaluation of their results. However, in computer-aided diagnostics, the measure that is used by the medical community might differ from the measures typical in image processing researches. Also, the output of such polyp detecting methods is tested as inputs for active contour methods.

Open Access: Yes

DOI: 10.1007/978-981-33-4676-5_10

Investigation of the Bearing Capacity of Transport Constructions Made of Corrugated Metal Structures Reinforced with Transversal Stiffening Ribs

Szabolcs Fischer Vitalii Kovalchuk Mykola Sysyn Majid Movahedi Rad

Publication Name: Infrastructures

Publication Date: 2023-09-01

Volume: 8

Issue: 9

Page Range: Unknown

Description:

Methods of increasing the bearing capacity of corrugated metal structures of transport constructions using transversal stiffening ribs in the form of additional corrugation and stiffeners are given. Based on the theory of elasticity, a mathematical model for estimating the stress-strain state of transport constructions made of corrugated metal structures reinforced with stiffening ribs in the form of double corrugation was developed. The method of determining equivalent forces during rolling stock passage is offered. It has been established that double corrugation increases the bearing capacity of corrugated metal structures. Therefore, additional corrugation of corrugated metal structures reduces stresses by up to 20% and deflections by 50%. The obtained results show that the increase in rolling stock speed does not lead to a significant increase in stresses and strains in CMS when the railway track corresponds to the design state.

Open Access: Yes

DOI: 10.3390/infrastructures8090131

Literature Review of Vibroacoustic Simulation in Geared Vehicle Power Transmission Systems for the Reduction of Radiated Noise

Ambrus Zelei Krisztián Horváth

Publication Name: Advances in Science and Technology

Publication Date: 2024-01-01

Volume: 153

Issue: Unknown

Page Range: 89-98

Description:

The radiated noise reduction of vehicular power transmission systems is one of the most actively researched areas. Noise not only impacts the comfort and safety of the driver and passengers but also regulated by the legislators. The simulation-based prediction of radiated noise of gear-drives is a rapidly evolving area and combines gear meshing models, finite element analysis, multibody dynamics and airborne noise simulation tools. The interfacing of these tools makes virtual noise prediction challenging. In this research, we conducted a literature review on vibroacoustic simulations, with a particular focus on reducing noise in power transmission systems. Based on the reviewed articles, it became evident that, although numerous measurement data are available, the usability of the data is limited. Most research focuses on individual stages of the structure and on smaller-sized powertrains. The measurement methods contain abundant valuable information; however, the literature lack of comprehensive articles that track the simulation process from the inception of excitation to body and air noises. Moreover, the majority of articles investigate the relationship between transmission error and NVH, considering it as a primary source of noise. New methodological approaches, such as the application of FEM meshes on gears, open new horizons in this domain. Throughout the literature review, we compiled potential noise-reduction solutions and highlighted directions for future methodology development research.

Open Access: Yes

DOI: 10.4028/p-Ucpx27

TP-based Control of the Crane Model

Miklós Kuczmann

Publication Name: Gpmc 2019 1st IEEE International Conference on Gridding and Polytope Based Modeling and Control Proceedings

Publication Date: 2019-11-01

Volume: Unknown

Issue: Unknown

Page Range: 9-12

Description:

Tensor product based model representation is a numerical technique to approximate the behavior of nonlinear systems. Based on the tensor product transformation a linear matrix inequality based controller design scheme can be applied efficiently. This framework is presented in the paper through the model of gantry crane.

Open Access: Yes

DOI: 10.1109/GPMC48183.2019.9106954

Parallels and patterns in the Italian (1901) and Hungarian (1903) legislation on migration

Balázs Pálvölgyi

Publication Name: Comparative Legal History

Publication Date: 2024-01-01

Volume: 12

Issue: 1

Page Range: 51-79

Description:

The second half of the nineteenth century was an era of mass labour migration in Europe, when the Atlantic route became of paramount importance alongside intra-continental mobility. From the last third of the century Italy and Hungary were among the most important emigrating countries. By this time changes in the regulation of migration had begun to take place with the development of stronger state control, which affected mobility and the relationship between emigrants and transporters. The question also arose as to whether and how the large emigrating states could ensure the loyalty of their emigrant citizens and control them en route and in the destination states. The regulatory process which began in the 1880s gradually moved from an administrative approach to the development of more comprehensive legal sources covering more and more aspects of emigration with the Hungarian government making use of foreign solutions, particularly the Italian Emigration Act of 1901.

Open Access: Yes

DOI: 10.1080/2049677X.2024.2349852