New articles of HUNGARIAN AGRICULTURAL ENGINEERING
List of accepted articles to Issue No. 40/2021
A. Dhaundiyal, G. Bercesi, L. Toth
Abstract: The paper pivoted on processing forest waste, Austrian Pine, for producing carbon enriched char. A small-packed bed reactor was developed to pyrolysis the processed char. The preparation of feedstock was carried out in an improvised muffle furnace. The following parameters were obtained to determine the potential of pine waste: thermal effectiveness, oil yield, char yield, gas yield, specific biomass consumption, and carbon conversion efficiency of the unit. The absolute increase in the cold gas efficiency of pine needles after torrefaction was 44%. As compared to Acacia wood chips (G30 and G50), a 4.8% rise in the carbon conversion efficiency was seen after thermal pre-treatment of pine needles. However, it was relatively dropped by 2% to the wood pellets. The obtained char yield from torrefied pine needles as to the wood pellets was augmented by 160%. On the contrary, the oil yield derived from torrefied pine pellet was dropped by 65% while comparing it with the wood pellets. The carbon dioxide emission was mitigated by 3.4% after torrefaction of raw pine needles, whereas it was reduced by 11.71% when it was compared with commercial wood pellets. A pronounced rise of 123% in the clean gas production was noticed after the torrefaction of pine needles, while it was 14.96% when it was compared with the wood pellets.
Keywords: packed bed, char, pine waste, thermal performance, wood pellets, clean gas
A. E. Eltayeb Ahmed, A. El Hariri, P. Kiss
Abstract: In this research, the interest will be given to studying the load bearing capacity and strength of soil terrain, resulting from machine-soil interaction. A small introduction will define terramechanics studies and its importance when dealing with machine-terrain interaction. The axial load acting on a terrain will lead to the sinkage of the machine, thus considering this load will help in studying the load bearing capacity of the soil and ending up with results that are beneficial to terramechnaics studies, so improvement in the machine design or choosing the suitable machine for specific terrain. This review shows the studies and models that researchers obtained and dealt with regarding the load bearing capacity. The techniques and the measurements used in finding the load bearing capacity of soil will be explained (Bevameter, Cone penetrometer).
Keywords: Load bearing capacity; Vehicle-terrain interaction; Bevameter; Cone penetrometer; Terrain; Soil pressure-sinkage; Terrain properties; Soil strength
T. Atobishi, M. Bahna, Cs. Fogarassy
Abstract: Mobile banking is a mobile commerce application that is revolutionizing financial services. Accepting and using a virtual system is not easy for users, either technologically or emotionally. The purpose of this research is to find out the effects of “Effect of Risk Perception”, “Perceived Ease of Use” and “Perceived Usefulness of Mobile Banking” on mobile banking attitude and adoption. For this study, data was collected in 2019 from N=220 participants using 19 items of five Likert-type questionnaires. The data was analyzed using Statistical Package for Social Sciences and Regression Analysis through the enter method was used. It was found out that there is a positive significant effect of perceived ease of use and perceived usefulness of mobile banking on mobile banking attitude. The results also showed, that attitude towards switching to mobile banking has a positive significant effect on the intentions of mobile banking adoption. It can be concluded that the perceived ease of use of mobile banking will have a significant impact on attitudes towards switching to mobile banking services. The results of the research show that the perceived risk has a significant effect on the mobile. Also, for the practitioners it is very important to take into consideration these results to promote the usage of mobile banking among the customers in Jordan. Our research results also show similarities and differences from previous research results, confirming the unique characteristics of the rapidly developing Arab region. User behavior related to mobile banking is shaped by the combined effect of custom and culture. Mobile banking services may be a very efficient and cost-effective tool in the future, accelerating industry development processes.
Keywords: mobile banking; technology adoption; consumer behavior; technology acceptance; banking service; perceived usefulness; behavior intention; mobile platforms