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Publications - 6278

Holistic Online Learning, in a Post COVID-19 World

Marta Konczosne Szombathelyi Kevin Jackson

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 11

Page Range: 125-144

Description:

In August of 2020, the United Nations reported that the COVID-19 pandemic had affected 1.6 billion learners, in more than 190 countries and on all continents [1]. The closing of schools and other learning spaces impacted an astonishing 94% of the world’s student population. These sudden school closures, at all levels, had the immediate and unprecedented effect of triggering a mass migration to emergency remote teaching. While mass vaccinations have enabled educational institutions to reopen and students to return to classrooms in the Fall of 2021, the educational disruption caused by the COVID-19 pandemic is far from over. Higher education must now permanently transition from reductionist, emergency remote learning systems to permanent, holistic online learning platforms. In order to better understand this transition, an online survey was delivered to diverse groups of international students attending Corvinus University and ESSCA School of Management, at the beginning and end of the Spring 2021 semester. The analysis of this survey, strongly indicates that the home and social environments of University, had a significant impact on the student’s learning aptitudes.

Open Access: Yes

DOI: DOI not available

Laboratory Tests and FE Modeling of the Concrete Canvas, for Infrastructure Applications

Szabolcs Fischer Majid Movahedi Rad B. Eller

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2022-01-01

Volume: 19

Issue: 3

Page Range: 9-20

Description:

The Concrete Canvas (CC) material, is a promising material for application in many civil engineering fields, such as, water construction, pipelining, slope protection, military applications, etc. The authors believe that this material has more potential and could be helpful in infrastructure applications. The infrastructure design requirements are known; the CC has to be fit into the track structure. Several relevant investigations were performed to show the materials adequacy, and using collected data, FE (Finite Element) models were built to determine more of the physical parameters. From the results and the hardening experiences, it can be stated, that after the laying of CC and the spraying of water, the material has to be loaded to reach the best shape and push the material down to the supporting protection layer. In FE modeling, it was shown that the material is a composite structure, i.e. one material's physical properties is not enough for modeling (it has to be improved). Moreover, it means that dynamic examinations can be initiated.

Open Access: Yes

DOI: DOI not available

Heritability and Trends in Selected Udder Traits and Their Relation to Milk Production in Holstein-Friesian Cows

Szabolcs Bene László Bognár Zsolt J. Kőrösi Ferenc Szabó

Publication Name: Animals

Publication Date: 2025-05-01

Volume: 15

Issue: 9

Page Range: Unknown

Description:

This study aimed to evaluate the heritability (h2) estimates of some important udder conformation traits, their relationship to each other and with production, and their phenotypic and genetic trends over a 10-year period in relatively high-yielding Holstein-Friesian cows. A total of 15,032 cows from six herds in Hungary were tested for milk (MY), butterfat (FY), and protein (PY) production yields over 305 days in first lactation. In addition, their udder conformation was scored for udder attachment (FU), rear udder height (RUH), central ligament (CL), udder depth (UD), front teat placement (FTP), and udder texture (UT) on a 1–9 linear udder score scale. REML and BLUP single-step animal model and linear regression model were used for data analysis and estimation. The production traits of the cows were quite reasonable, with 10,179.4 kg milk, 380.3 kg fat, and 333.1 kg protein in a standard lactation of 305 days. The scores of the udder conformation traits (5.4 to 6.1) were slightly above the mean of 5 on a linear scale of 1–9. The h2 for MY, FY, and PY were obtained from 0.30 to 0.35, while those for udder traits were from 0.22 to 0.41. Phenotypic (rp) and genetic (rg) correlations for the relationship between production and udder conformation were weak or negligible (ranged from −0.33 to +0.15). Most of the associations between different udder traits were generally weak, but moderate positive correlations were observed between FU and UD (rp = 0.42, rg = 0.50 or 0.57), and between FU and UT (rp = 0.36, rg = 0.33 or 0.35). There were increasing genetic trends in the milk production (b = 2.2 to 16.5), but the studied udder conformation traits did not change over time (b = 0.00 to 0.03). In our study, despite an increase in milk yield over the studied ten-year period, udder conformation traits did not change. Therefore, considering that udder conformation scores were slightly above average and that udder traits were included in the selection index, we believe that it may be necessary to reconsider the udder conformation scoring system and its inclusion in the selection index.

Open Access: Yes

DOI: 10.3390/ani15091276

Return-to-Play Timeline and Recovery Predictors After COVID-19 Infection in Elite Football Players

Zsolt Szelid Zsuzsanna Kives Ágnes Sziva

Publication Name: Sports

Publication Date: 2025-05-01

Volume: 13

Issue: 5

Page Range: Unknown

Description:

The pandemic period significantly impacted professional football, leading to mandatory SARS-CoV-2 testing and quarantine. Our study aimed to examine the factors influencing time of recovery after a positive test, including return-to-training (RTT) and return-to-first-match (RTFM) of male football players in a first-division Hungarian team between 8 May 2020 and 30 June 2022. Infection was determined using mandatory RT-PCR testing 3 times per week, which later decreased to 1 to 2 times per week, in 55 elite players. A self-administered questionnaire was utilized based on the U.S. Department of Health and Human Services symptom list and modified with relevant factors of return-to-play in football. The incidence of SARS-CoV-2-positive players in the three consecutive years was 5.26; 21.43 and 45.71%. Mild symptoms were present in test-positive players, completing the questionnaire (n = 31), predominantly loss of smell and dry cough. Post-infection fatigue levels correlated with the perceived performance decline. In players with precisely documented dates (n = 18), the average RTT was 18.7 days, while the RTFM was 67.3 days. Older players returned to training faster than their younger counterparts and the RT-PCR Ct number had a weak negative correlation with RTFM. Mental support was provided by family and friends in 68% of the players. This study highlights the variability in return-to-play timelines and the role of age, symptom severity and mental help in recovery and emphasizes the need for individualized rehabilitation in elite football.

Open Access: Yes

DOI: 10.3390/sports13050147

Estimating high mobility group box protein 1 (HMGB1) single nucleotide polymorphisms among hepatitis B virus infected patients of Pakistan origin

D. U. Ozsahin Y. Waheed U. Saeed R. Tahir Z. Z. Piracha R. Uppal A. A. Khan M. Ashraf S. Tabassum D. U. Ozsahin Z. Khalid A. J.I. Ngozi

Publication Name: Brazilian Journal of Biology

Publication Date: 2025-01-01

Volume: 85

Issue: Unknown

Page Range: Unknown

Description:

HMGB1 is nuclear non-histone protein and unique member of cytokines. In viral hepatitis infection HMGB1 serum level increases and translocates towards cytoplasm and extracellular spaces where it activates single stimulating hepatic stellate cell proliferation which induces fibrogenic protein expression and causes hepatocellular carcinoma. In this study, total 150 subjects were recruited to assess the association between HMGB1 SNPs and HBV. Three types of genotypes were found visible in rs3742305 of HMGB1; wild type homozygous GG with 65%, homozygous minor type CC with 6% and heterozygous minor type GC with 26% frequency distribution. High prevalence of GG genotype in the selected population presenting that GG genotype may have higher risk for susceptibility to HBV infection. Our results showed significant correlation of HMGB1 polymorphism with HBV infection in the selected Pakistani population.

Open Access: Yes

DOI: 10.1590/1519-6984.284560

Foot Progression Angle Modulates Knee Loading During Walking in Individuals with Flexible Flatfoot

Yaodong Gu Gusztáv Fekete Dong Sun Yang Song Xuanzhen Cen Zhenghui Lu Xin Li Yufan Xu Chengyuan Zhu Zifan Xia Linxiao Shen

Publication Name: Annals of Biomedical Engineering

Publication Date: 2026-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Purpose: This study evaluated tibiofemoral loading and medial meniscal stress distribution in individuals with flexible flatfoot (FFF) during walking under different foot progression angle (FPA) conditions. Methods: This study analyzed the gait of 28 FFF patients (16 males, 12 females) under three FPA conditions (neutral, toe-in, toe-out). Kinematic (Vicon) and kinetic (Kistler) data were used to estimate tibiofemoral forces in OpenSim. Subsequently, joint angles and muscle forces at peak tibiofemoral forces were used to drive a finite element (FE) model of the knee, enabling the comparison of meniscal von Mises stress, maximum shear stress, and contact pressure across FPA conditions. Results: Tibiofemoral force increased during early stance (9–11%) in the toe-in condition with this increase reaching statistical significance in males (p = 0.008, mean partial η2=0.70 within the SPM-identified cluster). FE analysis showed that peak stresses and contact pressure were primarily localized in the anterior region of the medial meniscus. A consistent directional response to FPA was observed with the lowest peak values occurring in the toe-in condition and the highest values in the toe-out condition. Conclusion: Adjusting FPA modulates intra-articular knee loading via the kinetic chain. For FFF patients, neutral FPA provides stable loading. The toe-in condition presents a complex mechanism: despite increasing tibiofemoral force (notably in males), it reduces peak stress by altering contact mechanics and stress distribution. Therefore, FFF gait interventions must be individualized based on factors like foot morphology, sex, and functional goals.

Open Access: Yes

DOI: 10.1007/s10439-026-04089-7

Subiasiana indica gen. nov., sp. nov., a new remarkable representative of Uropodina mites from India (Acari: Mesostigmata: Uropodidae)

Jenő Kontschán

Publication Name: Zootaxa

Publication Date: 2024-12-23

Volume: 5556

Issue: 1

Page Range: 296-302

Description:

A new genus, Subiasiana gen. nov. (Mesostigmata: Uropodina: Uropodidae), with Subiasiana indica sp. nov. as type species, is described based on one female and four males in soil samples from India. the new genus is similar to the Neotropical genus Clausiadinychus sellnick, 1930 (family clausiadinychiidae Kontschán, ermilov & Fridrich, 2023), but its gnathosomal appendages and the ventral setation are different from those of the new genus. the new genus resembles the Afrotopical genus Spinosissuropoda hirschmann, 1979, but the new genus differs from the previously described one in the shape of idiosoma, dorsal setation, and anterior gnathosoma process.

Open Access: Yes

DOI: 10.11646/zootaxa.5556.1.21

Opportunities within the meat supply chain in Africa-The case of beef production in Northern Ghana

Laszlo Vasa Imre Vida Áron Vaskó

Publication Name: Plos One

Publication Date: 2022-01-01

Volume: 17

Issue: 1

Page Range: Unknown

Description:

Developing food supply chains in the African agriculture could be one of the keys for higher value-added activities and for the fair income of the stakeholders along the chains. Our research aims to investigate how these agricultural value chains are working in Northern Ghana and how to develop them. To estimate meat demand in the Tamale Metropolis, we carried out a large-scale survey with more than 300 interviews. Furthermore, we also measured the awareness of processed meat products. Based on the results, our conclusions are as follows: Development of public services offers the opportunity to (1) gaining market power for ourselves while losing market power for others, (2) indirect takeover of control on political and civil societies while losing control for others, (3) to win allies and friends on one hand, potentially losing allies and friends on the other. After spatial analyses of grazing areas, animal markets, trading routes and witnessing the descriptions of basic macroeconomic differences within Ghana; we must conclude that live animal trade is south-orientated, where traders are able to bargain higher prices. Due to northern locational advantages, the price of animals could be reduced. The presumably cheaper workforce and dozens of unemployed young males could also alleviate the financial burdens.

Open Access: Yes

DOI: 10.1371/journal.pone.0260668

A CROSS-COUNTRY STUDY ON THE DETERMINANTS OF WORKING CAPITAL MANAGEMENT: GMM APPROACH

Laszlo Vasa Simona Andreea Apostu Ploypailin Kijkasiwat Anwar Hussain

Publication Name: Transformations in Business and Economics

Publication Date: 2022-01-01

Volume: 21

Issue: 3

Page Range: 288-305

Description:

The paper analyzed the determinants of Working Capital Management (WCM) of listed manufacturing firms across South Asian Association of Regional Corporation (SAARC) countries from 2000 to 2020. Employing a Generalized Method of Moments, we found that operational risk and market risk are key hurdles to efficient working capital management. Our results are providing an important managerial implication for the use of operational risk and market risk in selected countries. Firms in selected countries can manage an optimal level of WCM through controlling operational risk and market risk, therefore should develop a ranking system about WCM activities to boost up their firm value.

Open Access: Yes

DOI: DOI not available