Search in Publications

Found 6374 publications

Online content analysis between bike related attributes and review content in case of Budapest

Marcell Kupi Ferenc Darabos Agnes Horvath

Publication Name: Journal of Infrastructure Policy and Development

Publication Date: 2024-01-01

Volume: 8

Issue: 9

Page Range: Unknown

Description:

Active tourism, in our case bicycle tourism has been a proof of health benefits as well as responsible, sustainable way of transport. As tourist move around to see sights as well as gather experiences, this is a way to be efficient and green effective. This study aims to investigate bicycle tourism in cities, especially focusing on decision making as a bicycle tourist, when it comes to online bookings system, focusing on choosing a hotel. Method: we have used the several methods to analyze the reviews and ratings of hotels on Booking and TripAdvisor. We used hotels from Budapest only, focusing on bicycle tourism within the city. We investigated if there was any demand for bike related services when it comes to booking online. Our results show that there is significant relationship between choosing a hotel and the relevance of bike related services of the accommodation; however, it might not be the primarily decision making, and also following our hypothesis, online travel agents do not offer full package for bikers.

Open Access: Yes

DOI: 10.24294/jipd.v8i9.5078

The fermentability of agricultural raw materials by probiotic bacterial strains

Balázs Ásványi Székelyhidi Rita Zoltán Hatvan László Varga

Publication Name: Bio Web of Conferences

Publication Date: 2024-08-23

Volume: 125

Issue: Unknown

Page Range: Unknown

Description:

The objective of this study was to evaluate the fermentability of various agricultural raw materials using a novel Liquid State Fermentation (LSF) technique. The formulations were based on protein-rich plant ingredients, such as sunflower, wheat, and rapeseed, addressing the persistent issue of byproducts in the food industry by seeking alternative utilization methods. While the LSF method has been used in pork production, it remains a new technology in the poultry sector. Distiller’s Dried Grains with Solubles (DDGS) and Corn-Gluten Feed (CGF) were chosen based on previous experiments. These mixtures were enhanced by inoculation with various bacterial strains to produce fermented feeds with probiotic properties. The bacteria played a crucial role in the entire fermentation process. The starters included a commercial culture and fresh sweet whey of a semi-hard cheese. Additionally, selected bacterial strains were used based on previous research and literature data. Solaris model bioreactor system were utilized to produce the fermented feeds. This approach aims to promote a healthier gastrointestinal system in farm animals, protecting them against pathogenic bacteria. The fermentation process was designed to generate beneficial molecules such as enzymes, organic acids, and bacteriocins, further supporting the health benefits of the final product. This is significant because such feed can reduce the need for antibiotics in farm animal breeding, aligning with the EU’s stance on minimizing antibiotic usage. Throughout our research, we meticulously monitored the fermentation process, gathering data for a comprehensive comparison. Our analysis focused on changes in pH, the microbiological and hygienic properties of the feed, and the production of organic acids in the fermenting mixtures. The results consistently showed a decrease in pH values after 24 h of fermentation. DDGS with selected strains exhibited the highest LAB counts at 9.89 log10 CFU/cm3, whereas the combination of CGF and whey produced the highest lactic acid concentration at 28.86 mg/ml. These promising results warrant further investigation through animal trials.

Open Access: Yes

DOI: 10.1051/bioconf/202412503006

A general formulation of abduction algorithms

Claudiu Radu Pozna Radu Emil Precup

Publication Name: 3rd IEEE International Conference on Cognitive Infocommunications Coginfocom 2012 Proceedings

Publication Date: 2012-12-01

Volume: Unknown

Issue: Unknown

Page Range: 573-578

Description:

The paper offers a general formulation of abduction algorithms, referred to as minimum length solution algorithms, which are based on all observable states. The algorithms compute the necessary evidence to derive the correct hypothesis in minimum steps. A first version of algorithms is proposed such that to deal with situations when not all states are observable. The development of fuzzy inference systems is presented in order to apply the minimum length solution algorithms to sets of imprecise observations. © 2012 IEEE.

Open Access: Yes

DOI: 10.1109/CogInfoCom.2012.6421956

Microwave steam explosion and enzymatic hydrolysis of vine-branch

E. Lakatos V. Kapcsándi M. Neményi

Publication Name: Acta Alimentaria

Publication Date: 2018-09-01

Volume: 47

Issue: 4

Page Range: 443-452

Description:

Our research target was to utilise vine-branch, existing in huge amounts, for energetic purposes. During our experiments, microwave (MW) treatments of different powers (400-1600 W), pressures (1-5 bar), temperatures (120-180 °C), and treatment times (3-30 min) were applied to change the physical condition of vine-branch. After MW, enzymatic hydrolysis (EH) was used (85-100 h, 37 °C). In addition, beside MW, comparisons were made regarding various treatment methods: untreated (UTE), cooking plate (CP), and autoclave (AC), to determine to what extent they affect the final glucose yield. This yield can even further be increased by MW pre-treatment (50 W, 3-30 min, 40 °C) of the enzyme used during the hydrolysis, which reinforces the argument that enzyme activity can be increased by irradiation. A difference of 22.1% was detected among the glucose yield values in untreated and treated enzyme processes.

Open Access: Yes

DOI: 10.1556/066.2018.47.4.7

Climate conditions in ISO container shipments from Hungary to South Africa and Asia

Péter Böröcz Péter Csavajda

Publication Name: Periodica Polytechnica Transportation Engineering

Publication Date: 2019-01-01

Volume: 47

Issue: 3

Page Range: 233-241

Description:

The aim of this paper is to provide useful information about climate conditions of transcontinental shipments from Hungary and compare them to the climate profiles of conditioning standards. The climatic environments inside ISO intermodal containers carrying automotive products to three different destinations in India, China and South Africa were measured. All three recorded surveys contain temperature and relative humidity data while the containers were stored outdoors and indoors and travelled on truck, rail and ship. The measured data was analyzed and mean statistical values of daily temperature and RH shifts were determined for each route. The recorded data shows that 50 % of maximum temperature and RH shifts occurred in the EU continent. Temperature and relative humidity distribution as a function of cumulative percentages [%] of the duration of total shipping was also determined and compared to the climate profiles of conditioning standards. It shows that peak temperature and RH ranges occur mostly in the defined duration of conditioning testing time.

Open Access: Yes

DOI: 10.3311/PPtr.11585

A switched linear system approach to the modeling of the air path of diesel engines

Zsolt Horváth Petra Csomós

Publication Name: Aip Conference Proceedings

Publication Date: 2018-11-30

Volume: 2040

Issue: Unknown

Page Range: Unknown

Description:

This paper discusses the designing of switched linear system to the modeling of the air path of diesel engines for purpose of fault detection. The main goal for further investigation is to extend our proposed H-infinity robust filtering procedure for the entire engine operational range. For this reason, an appropriate modelling approach are needed to handle the nonlinear engine model. Our idea is to design a switched system being reasonable for approximation of the main attribute of the nonlinear system, moreover, it can be handled as a linear system. This is done by creating linear time-invariant systems for various operating points of a nonlinear plant and, based on a pre-defined switching rule, we switch between them. After a short introduction of mathematical results how to derive a switched system, we explain the steps of the designed procedure. Finally, the applicability is demonstrated based on the model of air path of diesel engines via MATLAB simulations.

Open Access: Yes

DOI: 10.1063/1.5079206

Application of evolutionary algorithms for energy efficient building design

No authors available

Publication Name: IWACIII 2011 - International Workshop on Advanced Computational Intelligence and Intelligent Informatics, Proceedings

Publication Date: 2011-12-01

Volume:

Issue:

Page Range: Unknown

Description:

The topic of energy efficient building design is an attractive philosophy in the era of diminishing fossil energy sources drained by the ever increasing thirst of the Earth's population for energy. In this paper we propose to apply evolutionary algorithms aiding the design of energy efficient buildings. We employ a simple mathematical model involving a large number of parameters. Energy efficiency is defined in terms of these parameters through algebraic evaluations. The quasi-optimal values of the fitness function representing the level of energy efficiency are obtained by Bacterial Evolutionary Algorithms. Results indicate that in the case of a prescribed total construction cost close to 80% improvement can be achieved in terms of energy efficiency. On the other hand, if one targets a prescribed energy efficiency, more than 30% of the total construction costs can be saved by proper optimization.

Open Access: No

DOI: DOI not available

The long and short of asking questions about income: A comparison using data from Hungary

Wim Jansen Péter Róbert Jos Dessens Willem Jan Verhoeven

Publication Name: Quality and Quantity

Publication Date: 2013-06-01

Volume: 47

Issue: 4

Page Range: 1957-1969

Description:

A lot of research on income mobility and income inequality is based on survey questions about income. Various question formats are being used. Researchers seem to assume that the actual format used delivers the best estimate of the "true" income. However, surprisingly little empirical support is available for this claim. We implemented an experimental design using the short and long versions of income questions in a Hungarian survey. Results show an overall positive difference between the long and short version. The differences are related to the income components (wages and salaries, transfers, and assets), and respondent characteristics, controlling for the effect of the order of the two versions of income questions. Based on the results, we provide some recommendations for implementing income questions in surveys. © 2011 Springer Science+Business Media B.V.

Open Access: Yes

DOI: 10.1007/s11135-011-9636-5

Sustainability reporting practices of agricultural and forestry companies in Hungary: a content analysis

Károly Kacz Szabolcs Troján Judit Hegyi Nóra Gombköto Anita Miklósné Varga

Publication Name: Bio Web of Conferences

Publication Date: 2024-08-23

Volume: 125

Issue: Unknown

Page Range: Unknown

Description:

To demonstrate the sustainability of companies, some companies have already produced sustainability reports, most of which have been published on their websites, while others have only produced and made public the reports and certifications required by law. In the European Union, legislation as of 2014 required the preparation of non-financial reports for publicly relevant entities, companies and parent companies of large groups of companies considered to be entities and having an average number of employees of more than 500. However, in line with the European Green Deal and the Taxonomy Regulation, as of 2023, a new law has been introduced, which extends the sustainability reporting obligation to nonpublic large companies and public small and medium-sized enterprises. Agricultural enterprises should also be prepared for this reporting obligation. This study aims to examine the ESG indices of the sampled companies and seek a correlation between the quality of the information disclosed and the financial characteristics of the companies. The results show that while forestry companies pay more attention to the disclosure of this type of information, there is some under-disclosure in both sectors.

Open Access: Yes

DOI: 10.1051/bioconf/202412501010