Search in Publications

Found 6289 publications

FACTORS EFFECTING FEMALE STARTUPPERS IN HUNGARY

Marta Konczosne Szombathelyi Petra Kinga Kézai

Publication Name: Economics and Sociology

Publication Date: 2021-01-01

Volume: 14

Issue: 4

Page Range: 186-203

Description:

The present paper focuses on female startup founders in Hungary. Numerous studies examine female entrepreneurship, but the topic of female startups is a less explored area. The research was carried out in two stages: at first in 2019 through an online survey and in-depth interviews, and then in May 2021 with in-depth interviews due to the delays caused by the COVID-19 pandemic. Mixed research methodology was used and comprised of an online questionnaire administered in startup-themed closed social media groups (n=113) and in-depth interviews among experts and members of the ecosystem (n=7+7). The aim was to conclude how potential female startup founders could be encouraged and what form of support should be given to them, as well as to explore the effects of the Covid-19 pandemic on female startup entrepreneurs. The results show that 70 percent of respondents have their own business, these were set up by both sexes between the ages of 24 and 35. The respondents mostly use equity when starting their businesses. Although the proportion of women among startup founders is very low, a positive entrepreneurial attitude can be observed among them. The startup ecosystem is centralised in Hungary; it is only emerging in some major university cities outside the capital. The strengthening role of startup communities and social media is unquestionable. Furthermore, the results reveal limiting factors, especially complex ones hindering female start-ups, which can typically be traced back to family and social reasons. To overcome these obstacles governments should continue facilitating startup development. The pandemic was considered as an opportunity to promote new ideas and features, concentrate on design and finetune their startup businesses.

Open Access: Yes

DOI: 10.14254/2071-789X.2021/14-4/11

Simulation of an active cooling system for photovoltaic modules

Lotfi Abdelhakim

Publication Name: Aip Conference Proceedings

Publication Date: 2016-06-08

Volume: 1738

Issue: Unknown

Page Range: Unknown

Description:

Photovoltaic cells are devices that convert solar radiation directly into electricity. However, solar radiation increases the photovoltaic cells temperature [1] [2]. The temperature has an influence on the degradation of the cell efficiency and the lifetime of a PV cell. This work reports on a water cooling technique for photovoltaic panel, whereby the cooling system was placed at the front surface of the cells to dissipate excess heat away and to block unwanted radiation. By using water as a cooling medium for the photovoltaic solar cells, the overheating of closed panel is greatly reduced without prejudicing luminosity. The water also acts as a filter to remove a portion of solar spectrum in the infrared band but allows transmission of the visible spectrum most useful for the PV operation. To improve the cooling system efficiency and electrical efficiency, uniform flow rate among the cooling system is required to ensure uniform distribution of the operating temperature of the PV cells. The aims of this study are to develop a 3D thermal model to simulate the cooling and heat transfer in Photovoltaic panel and to recommend a cooling technique for the PV panel. The velocity, pressure and temperature distribution of the three-dimensional flow across the cooling block were determined using the commercial package, Fluent. The second objective of this work is to study the influence of the geometrical dimensions of the panel, water mass flow rate and water inlet temperature on the flow distribution and the solar panel temperature. The results obtained by the model are compared with experimental results from testing the prototype of the cooling device.

Open Access: Yes

DOI: 10.1063/1.4952279

Empowering resilience: celebrating and accelerating women’s transformative contributions to plant abiotic stress research (2010–2025)

Szilvia Veres Nevien Elhawat Éva Domokos‑Szabolcsy

Publication Name: Frontiers in Plant Science

Publication Date: 2026-01-01

Volume: 17

Issue: Unknown

Page Range: Unknown

Description:

The growing incidence of abiotic stresses ranging from soil salinity and prolonged drought to increasingly frequent temperature extremes continues to challenge global agriculture and jeopardize food security. As these pressures intensify under a changing climate, the demand for resilient crop systems and deeper biological understanding is greater than ever. Over the past decade and a half (2010–2025), women scientists have played a pivotal yet often under-recognized role in advancing plant abiotic stress research. Their contributions span a wide scientific spectrum, from elucidating redox-based signaling networks and stress-responsive physiological pathways to pioneering multi-omics approaches and developing innovative biotechnological tools aimed at improving crop tolerance. This review synthesizes the scientific progress achieved through research efforts led by women as first authors, corresponding authors, or principal investigators, highlighting exemplary studies and emerging themes that have shaped the field. Alongside these accomplishments, the review addresses persistent structural and institutional barriers that limit women’s participation in STEM, particularly within plant sciences, and evaluates global initiatives designed to promote equity and inclusion in research environments. By integrating scientific advances with social and institutional perspectives, the review outlines a strategic roadmap to support and amplify innovation driven by women scientists, including as leaders in research teamsin plant stress biology. Ultimately, fostering gender equity in this discipline is more than an ethical responsibility it is a necessary foundation for building sustainable, climate-resilient agricultural systems for the future.

Open Access: Yes

DOI: 10.3389/fpls.2026.1788373

New data on terrestrial gastropods (Gastropoda: Cyclophoroidea) from mid-Cretaceous Burmese amber, with descriptions of two new species in the genus Euthema (Diplommatinidae)

J. M. Bichain Barna Páll-Gergely Imre Szenti M. Szabó None Kokavecz

Publication Name: Zoosystematica Rossica

Publication Date: 2025-01-01

Volume: 34

Issue: 2

Page Range: 336-353

Description:

Mid-Cretaceous Burmese amber preserves an exceptionally diverse assemblage of operculate land snails. Here, two new diplommatinid species are described: Euthema convexispira Bichain et Páll-Gergely, sp. nov. and Eu. torokzselenszkyi Páll-Gergely et Szabó, sp. nov. Newly found specimens of two previously known species, Hirsuticyclus canaliculatus Yu, 2022 and Cretadiostoma caperatum Yu, Zhuo et Páll-Gergely, 2023, are described and illustrated; the specimen of the former is characterised by a distinctive spiral operculum, while that of the latter provides additional data on the morphology of the aperture and the proportions of the shell whorls. Furthermore, the article reports three specimens that are tentatively attributed here to the species Euthema cf. annae Balashov, 2021 and to the genera Euthema Yu, Wang et Pan, 2018 and Pulchraspira Yu, Salvador et Jarzembowski, 2021.

Open Access: Yes

DOI: 10.31610/ZSR/2025.34.2.336

Exploring disparities in the generation of food waste from a spatial and sustainability perspective

A. Zseni András Horváth Gergely Zoltán Macher Dóra Sipos Judit Pécsinger

Publication Name: Bio Web of Conferences

Publication Date: 2024-08-23

Volume: 125

Issue: Unknown

Page Range: Unknown

Description:

In the near future, food production will encounter numerous challenges. The world's population, per capita intake of calories, protein, and cereals is growing, and expected to continue increasing in the future. According to the World Resources Institute, feeding 9-10 billion people by 2050 will require a 70% increase in food calorie compared to 2006 levels. The expansion of crop and livestock production, the increasing use of fertilisers and pesticides at global level, and the growing adoption of precision farming methods may not be appropriate in the light of problems such as soil degradation, the impact of climate change on yields, the depletion of fish stocks and the reduction of arable land per capita in certain areas. Mitigation of food waste can be a possible way to sustainable food supply but it alone cannot solve the problem. The paper focuses on examining disparities in the generation of food waste from a spatial and sustainability perspective within EU-countries. Data related to food waste and various environmental, social and economic indicators are collected for EU countries. Correlation between these parameters is investigated to find possible connections. Cluster analysis is applied to food waste data to find the groups of countries with similar characteristics. The distribution of environmental, economical, and social parameters is calculated for these groups, and statistical methods are applied to investigate their differences.

Open Access: Yes

DOI: 10.1051/bioconf/202412502002

Welding distortion generated uncertainties in the vibrational behavior of a ladder-like structure

Dániel Feszty Marcell Treszkai David Sipos

Publication Name: Proceedings of Inter Noise 2021 2021 International Congress and Exposition of Noise Control Engineering

Publication Date: 2021-01-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Recent developments in acoustic simulation methods allowed engineers to assess the vibroacoustic behavior of various type of structures within a virtual environment, thus allowing the replacement of prototype-based development with simulations. However, there are some factors, that cannot be considered in simulations in advance. In the present study, the effect of the distortions generated due to welding on a ladder-like structure equipped with flat plates was investigated. The measured acceleration frequency response functions were compared to finite element simulation results. The measured responses differed significantly from the simulation, even in the low frequency ranges, where the global modes were not expected to be altered or vanished. Investigation of the simulated results revealed that the additional modes were related to the vibration of the plates, which were assumed to be flat, instead of considering the warping caused by the welding process. After measuring the approximate deformation of the plates, an updated simulation model was made, introducing an approximate curvature in them. The results obtained with the updated simulation model performed much better in the low frequency range as well as in the third octave-averaged frequency bands up 1200 Hz. The sensitivity of the warping was also systematically evaluated.

Open Access: Yes

DOI: 10.3397/IN-2021-2844

Design and Testing of a Water Injection System of a Turbocharged Spark Ignition Engine in Testbench Environment

Máté Tóth Balázs Rácz Attila Gyuris Péter Sass J. Rohde-Brandenburger

Publication Name: Lecture Notes in Mechanical Engineering

Publication Date: 2021-01-01

Volume: 22

Issue: Unknown

Page Range: 321-333

Description:

In the scope of this article, the design and testing of a water injection system applicable for a spark ignition engine are presented. Increasingly stringent emission standards within the framework of EURO7 require either directly or indirectly the internal combustion engines to be optimized across the entire field of an engine map, therefore they must comply with the emission standards at each operating point. The greatest challenge is expected to be the Lambda = 1 operation on the full field. The conversion efficiency of the exhaust gas after treatment systems is the highest at this point, therefore it is foreseeable that no deviation can be made. As a result, fuel enrichment for performance enhancement and to protect components against thermal load will not be tolerated, so the resulting thermal loads will need to be reduced in other ways. It is possible to reduce the excess thermal loads by using water injection. Evaporation of water in the intake system and combustion chamber takes off heat and the temperature of the contacting components and fluids decreases. The affected components include pistons, combustion chamber, cylinder head, exhaust valves, exhaust manifold, turbine wheel, turbine housing, and as a medium, the temperature of the intake air. Reducing the temperature of some components is important in the aspect of mechanical strength, while for some components the knock limit can be extended. This article presents the detailed design process and testing phase of a water injection system. An important aspect in system design is compatibility with different engine layouts in a cost-effective manner. Injector nozzle testing also includes analysis of mass flow, dispersion and spray pattern. The scope of the work is the implementation of a water injection system, which is capable of performing measurements in testbench environment at the Department of Internal Combustion Engines and Propulsion Technology of Széchenyi István University. The result of the measurements is the successful cylinder selective application of water injection to the intake system, whereby the addition of water reduces the temperature of the intake air and the exhaust gas, which can be reduced to standard calibration temperature in Lambda 1, without fuel enrichment.

Open Access: Yes

DOI: 10.1007/978-981-15-9529-5_29

Co-composting with herbal wastes: Potential effects of essential oil residues on microbial pathogens during composting

E. Lakatos Babett Greff Jenő Szigeti László Varga

Publication Name: Critical Reviews in Environmental Science and Technology

Publication Date: 2021-01-01

Volume: 51

Issue: 5

Page Range: 457-511

Description:

Because of the increasing use of herbal essential oils (EO) in pharmacology, medicine, and food processing, global EO production grows at a rapid rate, generating large amounts of plant residues worldwide. The use of herbal residues for co-composting with various wastes offers a novel option for eco-friendly and cost effective waste management. However, the biologically active compounds remaining in the herb residues may affect microbial activity in the composting biomass, thereby influencing final compost quality. In this review, we summarize and evaluate current literature on the occurrence and survival of pathogens in composts, the beneficial effects of using herbal residues as bulking agents, and the potential antipathogenic effects of six herb species belonging to the Lamiaceae family as follows: lemon balm (Melissa officinalis L.), oregano (Origanum vulgare L.), lavender (Lavandula angustifolia Mill.), rosemary (Rosmarinus officinalis L.), thyme (Thymus vulgaris L.), and sage (Salvia officinalis L.).

Open Access: Yes

DOI: 10.1080/10643389.2020.1732780

Imaginative and interpretative 'cognitive revolution' of W. Pauli collaborating with C. G. Jung and constantine porphyrogenitus' hidden world

Peter Varlaki Péter Baranyi

Publication Name: 8th IEEE International Conference on Cognitive Infocommunications Coginfocom 2017 Proceedings

Publication Date: 2017-07-02

Volume: 2018-January

Issue: Unknown

Page Range: Unknown

Description:

The paper deals with the reinterpretation of Wolfgang Pauli's 'cognitive revolution' of imagination and hermeneutical explanation cooperating with C.G. Jung. In the identification of the creative unconscious background processes (a concept introduced by Pauli himself) found in the dreams, imaginations and interpretations of Pauli and Jung, the number-archetypes, structures, patterns and meanings seem to be related to the hidden world of the great monarch Constantine Porphyrogenitus and his 'followers'.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2017.8268295