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Publications - 6273

Biomolecule composition and draft genome of a novel, high-lipid producing Scenedesmaceae microalga

Péter Bálint Gergely Maróti Prateek Shetty Eszter Badics Norbert Incze V. Soós Vince Ördög E. Balázs

Publication Name: Algal Research

Publication Date: 2021-04-01

Volume: 54

Issue: Unknown

Page Range: Unknown

Description:

Lipid biosynthesis in microalgae can be stimulated by cultivation in low nitrogen medium. MACC-401 was isolated from the soil surface in Tres Marias (MG-Brazil). The strain shows the morphological characteristics of the Scenedesmaceae green algae. The daily biomass and lipid production of MACC-401 is remarkable, 0.36 g L−1 and 110 mg L−1, respectively. Exploration of the genetic background of this promising strain not only allows the utilization of this species for industrial-scale lipid production, but also provides genetic targets to select lipid-producing strains from microalgae collections. We conducted physiological experiments by cultivating MACC-401 in complete and N-limited media and performed genome sequencing as well as transcriptome analysis. The estimated nuclear genome size of MACC-401 is 99.503 Mbp and the chloroplast genome is 0.15 Mbp. The phylogenetic analysis confirmed that the MACC-401 belongs to the Scenedesmaceae family, and represents a genetically distinct accession in this family. A basic comparative transcriptome analysis resulted in the identification of N-starvation responsive genes, which could serve as markers to monitor the onset of lipid accumulation in algal cultures.

Open Access: Yes

DOI: 10.1016/j.algal.2020.102181

Sentiment Analysis of Marketplace Lending Platforms: A Study Based on Natural Language Processing

Jewel Kumar Roy

Publication Name: International Journal of Business Analytics

Publication Date: 2025-01-01

Volume: 12

Issue: 1

Page Range: Unknown

Description:

This study explores the link between user sentiment and credit risk on FinTech lending platforms using sentiment analysis techniques like Latent Dirichlet Allocation (LDA) and the Liu Hu method. Analyzing data from 2020 to 2023, findings reveal Kiva leads with 91.16% positive feedback and a 4.7-star rating but fewer reviews (617). LendingClub, with 1.58K reviews, has mixed sentiment (56.08% positive, 39.99% negative) and a lower rating (3.3 stars). Plenti achieves 58.33% positive sentiment but lower coherence, while Mintos balances sentiment (66.69% positive) with the largest review base (100K+). Results show platforms with higher positive sentiment and topic coherence mitigate credit risk more effectively, underscoring the value of user feedback in optimizing marketplace lending. The study offers actionable insights for FinTech stakeholders to improve app performance and user-centric financial solutions through effective sentiment analysis.

Open Access: Yes

DOI: 10.4018/IJBAN.393942

Law pertaining to political parties and political pluralism - Freedom of the foundation and functioning of political parties in post-communist Hungary

Péter Smuk

Publication Name: Acta Juridica Hungarica

Publication Date: 2007-03-01

Volume: 48

Issue: 1

Page Range: 71-85

Description:

This paper studies the law pertaining to political parties in Hungary, from the viewpoint of establishing and maintaining of political pluralism. In the period of 1989-1990, the transition from the one-party system to the democratic and pluralistic state of law could be followed up relative to the development of the law pertaining to the political parties, which is based on the rules that foreclose the contingent development of unconstitutional political system. The paper reviews the concept of the political party according to the constitutional law, the normative framework of functioning and the regulations of the internal organization of political parties. The provisions of primary importance concern: a) equality of political parties, b) forbidden purposes and instruments, c) rules of incompatibility, d) state subvention. Rules concerning the internal organization require the openness and the prevailing of democratic will-making also inside the political parties, so contribute to the maintaining the democratic competition of political parties. The author emphasizes the factors that determine multiparty-system, and argues that electoral thresholds and the effective method of state-financing of political parties contest the principle of equality and harm the fair-competition. Thresholds and subvention are both based on the effectiveness of political parties-though being capable to prevent the party system and the parliament from fragmentation, nonetheless, they prefer extensively, if not unconstitutionally, the political parties in the Parliament, so they can be seen as being designed to protect the current political elite. © 2007 Akadémiai Kiadó.

Open Access: Yes

DOI: 10.1556/AJur.47.2007.1.5

Examining cross‐border cultural tourism as an indicator of territorial integration across the slovak–hungarian border

Tamás Hardi Eszter Szemerédi Gyula Ocskay Marcell Kupi

Publication Name: Sustainability Switzerland

Publication Date: 2021-07-01

Volume: 13

Issue: 13

Page Range: Unknown

Description:

There are numerous examples of cross‐border regions in Europe, which are regions not properly demarcated by national borders. One of the main driving forces of the European Union is to turn the dividing borders into connecting borders by strengthening the cohesion between states and regions, thus, encouraging regions to remedy the existing ethnic and cultural fragmentation by increasing the intensity and number of cross‐border contacts. Our research focuses on proving that, in symbolic places, such as the cross‐border area of Komárom and Komárno, the cultural values, monuments, and heritage sites are the strongest attraction factors for nationality‐based cultural tourism. To support our hypothesis, we conducted an empirical survey within the framework of the H2020 SPOT (Social and Innovative Platform on Cultural Tourism and its potential towards deepening Europeanisation) in the cross‐border region of Komárom and Komárno. The evaluation con-centrated on four aspects of cultural tourism: the nature of cultural tourism in the area, the resident and visitor perceptions of the cultural tourism offerings, opportunities to increase cross‐border col-laboration, and options to improve the cultural tourism offerings of the area. Our results show that, although there is a great potential in the cross‐border tourist destination of Komárom–Komárno, the integration of the (once united) two towns is advancing very slowly, which can be witnessed in the weaknesses of tourism integration as well.

Open Access: Yes

DOI: 10.3390/su13137225

Life Cycle-Based Environmental Assessment of Hydrogen Production Mixes Projected in the Hungarian Hydrogen Strategy Using the Environmental Footprint Methodology

Artúr Szilágyi Dóra Sipos

Publication Name: Chemical Engineering Transactions

Publication Date: 2025-01-01

Volume: 121

Issue: Unknown

Page Range: 61-66

Description:

Hydrogen (H2) is increasingly cited as a key element of future sustainable energy systems. Environmental assessment of H2 production is gaining importance in meeting climate goals. While current literature mainly focuses on reducing CO2 emissions, other life cycle impacts – such as effects on ecosystems, human health, and resource use – are often underestimated. In the Hungarian context, this study represents the first attempt to estimate the environmental impacts of the national Hydrogen Strategy. This study aims to fill this gap through a quantitative environmental evaluation of hydrogen production pathways projected in the Hungarian Hydrogen Strategy. Based on life cycle assessment (LCA) using the Sphera database, three major production technologies were modelled: steam methane reforming (grey), reforming with carbon capture (blue), and solar PV-based electrolysis (green). Results show that the total environmental burden of hydrogen production in Hungary could be halved by 2050 compared to 2020, while the specific carbon footprint of H2 production could be 75 % lower than today. However, this projection excludes expected efficiency improvements, as much of the future capacity has yet to be built.

Open Access: Yes

DOI: 10.3303/CET25121011

Blockchain research in healthcare: a bibliometric review and current research trends

Horst Treiblmaier Suhaiza Zailani Abderahman Rejeb Karim Rejeb

Publication Name: Journal of Data Information and Management

Publication Date: 2021-06-01

Volume: 3

Issue: 2

Page Range: 109-124

Description:

The literature on blockchain-enabled use cases has grown exponentially over recent years. Yet, studies are missing that apply bibliometrics and visualization techniques to unravel the dynamics and current discussions pertaining to the nexus of blockchain technology (BCT) and the healthcare field. To close this knowledge gap, we examine the knowledge base and research hotspots of BCT research in the field of healthcare. We carry out a series of bibliometric analyses on the extant literature, including the scholarly production, developmental pattern of the annual total number of authors, and identification of productive academic institutions, countries, and leading authors. Additionally, we conduct a keyword co-occurrence analysis and identify the major research hotspots and trends for the future. The findings of this research are valuable for scholars and practitioners who seek to better understand the development status, dynamics, and trends pertaining to BCT in healthcare.

Open Access: Yes

DOI: 10.1007/s42488-021-00046-2

Emotion and Reasoning in Hungarian heart Metaphors

No authors available

Publication Name: Language, Expressivity and Cognition

Publication Date: 2023-01-01

Volume:

Issue:

Page Range: 17-35

Description:

Open Access: No

DOI: DOI not available

Overall Equipment Effectiveness (OEE) Complexity for Semi-Automatic Automotive Assembly Lines

János Jósvai Péter Dobra

Publication Name: Acta Polytechnica Hungarica

Publication Date: 2023-01-01

Volume: 20

Issue: 2

Page Range: 63-82

Description:

In industrial practice, measuring and monitoring production performance is an essential task. The production plan performance is monitored by middle and top management of companies daily, weekly and monthly and make short and long-term operational and strategic decisions when necessary. One of the most common ways of measuring the performance of production and, within this, of assembly lines, is to use the Overall Equipment Effectiveness (OEE) indicator. Although companies sometimes interpret and use this Key Performance Indicator (KPI) in their own way, it is the indicator that best reflects the development of the production efficiency for a given company. A high OEE percentage means high performance, which directly increases the company's profitability. This article explores the complexity of the OEE indicator, supported by the use of a cause and effect diagram. Firstly, a literature review demonstrates scientific relevance. Secondly, the factors affecting OEE are grouped and analyzed according to the following six aspects: man, environment, method, material, machine, and measurement. Each factor is further subdivided into five groups, and then these subgroups also cover five key factors of importance for the approachability of 100% OEE. The 150 aspects listed herein, provide a complete guideline for a semi-automatic assembly line, to consistently increase efficiency in industrial practice.

Open Access: Yes

DOI: 10.12700/APH.20.2.2023.2.4

Artificial aging experiments of neat and contaminated engine oil samples

Ibolya Zsoldos András Lajos Nagy J. Rohde-Brandenburger

Publication Name: Lubricants

Publication Date: 2021-06-01

Volume: 9

Issue: 6

Page Range: Unknown

Description:

This study highlights how the results from an artificial engine oil aging method compare to used engine oil samples collected from a vehicle fleet. Additionally, this paper presents the effect of contaminating the oil during aging with synthetic fuel alternatives on the physical and chemical properties of artificially aged engine oil samples. A laboratory-scale artificial thermo-oxidative aging experiment was conducted on multiple samples of commercially available formulated fully-synthetic SAE 0W-30 engine oil. The goal of the experiment was to establish the validity of the artificially aged samples as well as the validity of the underlying process in reproducibly fabricating small batches of aged engine oil with comparable chemical and physical properties to real-life used oils. Eight samples were subjected to distinct load cases (temperature, air flow rate, sample volume and aging time). Six additional samples were subjected to an intermediate load case, with five of them contaminated with selected conventional fuels and novel automotive fuel candidates. Conventional oil analysis was conducted on each sample to determine oxidation, residual additive content, kinematic viscosity and total base number. Additionally, analysis results were compared to in-use engine oil samples through PCA. The resulting oil condition after aging is in accordance with independently published results in terms of zinc dialkyldithiophosphate content and kinematic viscosity. Contaminated aging with OME3-5 resulted in a drop in antioxidant content and elevated kinematic viscosity. Based on the comparison with in-use samples, artificial aging of 200 mL engine oil at 180◦ C with 1 L/min air flow for 96 h can produce similar oil conditions as mixed vehicle use for 7000 km.

Open Access: Yes

DOI: 10.3390/lubricants9060063