Search
Search Results
-
Visual Analysis and Geometric Modeling of Metal Foams
89-92Views:223The development of an efficient procedure for 3D modelling and finite element simulation of metal foams
is one of the greatest challenges to engineer researchers nowadays. Creating 3D CAD model is alone a demanding
engineering task due to its extremely complex geometry, and the proper finite element analysis process is still in the
center of the research. The aim of this project is to analyze the related literature and to adapt the results may be
considered. -
Enhancing Sustainable Production Through Continuous Improvement: Evidence from Nigeria’s Manufacturing Sector
1-20Views:127The manufacturing industry in Nigeria has been the so-called cornerstone of economic development since the sector has continuously played a major role in providing jobs and industrial capital. However, there remain issues that impede its progress, including inefficient resource use, unstable regulatory systems, and the need to comply with international market requirements. Specifically, it examined the effect of employee engagement, process efficiency, and resource allocation on Nigeria’s manufacturing sector. A survey research design was adopted, with a total population of 117 employees across five manufacturing firms. A total of 91 participants were administered a structured questionnaire. Data collected was analyzed using PLS-SEM. Findings revealed that employee engagement has the strongest effect on sustainable production (β = 0.412, t = 6.250, p < 0.000), followed by resource allocation (β = 0.237, t = 3.610, p < 0.000), and process efficiency (β = 0.174, t = 2.877, p = 0.004). It concluded that continuous improvement is significantly vital for sustainable production in the five sugar manufacturing firms studied in Nigeria. It is therefore recommended that management of these selected firms focus on developing unique resource allocation strategies, employee engagement, and process efficiency to ensure sustained workforce improvement, thereby achieving sustainable production outcomes.
-
Global Inversion of Pressure Dependent Acoustic Velocity Data Based on a New Rock Physical Model
47-55Views:255In this paper with the further development of our previously published single exponential model, the new multiple exponential model describing the pressure dependence of acoustic longitudinal wave velocity is presented. Since with increasing pressure in the rock several relaxation mechanisms at the same time can cause the increasing propagation velocity, the new model can handle two or more physical mechanisms (e.g. the closure of pore volume or microcracks or friction on grain boundaries etc.). The previously applied linearized inversion procedure can trap in a local minimum, so during laboratory measured longitudinal velocity-pressure data processing a global optimization method was used to find the absolute minimum. Using the developed model equation as response equation in a Simulated Annealing algorithm the petrophysical parameters of the model can be determined. Inversion results proved that the calculated data using the new model and algorithm matched more accurate with measured data on a rock sample.
-
Development of Gait Recognition in NI LabVIEW
22-26Views:245Nowadays, one of the most significantly improving area in security is the world of biometric identifiers. Within the biometric identifiers, the research group is working with the gait recognition speciality. The research group realized a complex gait recognition system in NI LabVIEW, that can detect more reference points simultaneously with a universal camera and is capable of suiting predetermined curves on the detected points. Moreover, the program can compare the functions suited on the reference curve and the actual curve and evaluate if the two gait images are the same or not. In the program there is a saving and a reloading function which contributes to the production of the reference gait image. The foot analysis program before the gait recognition is designed to improve accuracy. The self-developed gait recognition system was tested on more persons and the False Acceptance Rate (FAR) was zero.
-
Business Strategy in the Model of Linear Activity Analysis of Production
1-14Views:289It was analyzed how the methodology of linear activity analysis of production model supports the implementation of different business strategies at a company level. Aspects of analysis are focusing on openness for markets, lean management and environmental protection strategies. The study reveals that the linear activity analysis of production – mainly due to its efficient process optimization problem solving ability – is capable supporting lean management decisions and implementing additional objectives in business strategies. Such objectives can be sustaining specific production patterns for further development or following strategies for limiting market competition. It will be shown how to quantify the costs of strategic objectives in linear activity analyzing model.
-
Innovative Strategies and Student Academic Performance: Machine Learning Insights on International Students in Chinese Universities
37-60Views:286The higher education sector in China has faced unprecedented challenges recently due to the global COVID-19 pandemic. The influx of international students, a vital component of the nation's academic landscape, presented distinct challenges, including maintaining academic achievements through various online platforms, which necessitated innovative strategies to ensure that their educational pursuits remained rewarding despite these challenges. This study aims to explore the innovative strategies adopted by Chinese higher education institutions in response to the COVID-19 pandemic and examine their impact on the academic achievements of international students. This study employs a comprehensive approach that incorporates questionnaire surveys and dominant Machine Learning Algorithms, such as Multiple Linear Regression (MLR), Decision Tree Model (DTM), Support Vector Regression Model (SVRM), and K-nearest neighbors (KNN). By employing rigorous data-gathering approaches, our study aimed to address a set of particular questions: How did these innovative strategies improve students' academic performance in the face of environmental emergencies? To what extent did international students benefit from these adaptations? Through investigation of these concerns, our research provides insight into the effectiveness of these strategies and their possible significance for future educational methodologies. Innovative strategies positively correlated with student academic performance during the COVID-19 pandemic in Chinese higher Education. This research highlights how overcoming these challenges can have broader implications for shaping resilient global education systems in future crises. The study accurately predicted academic performance, highlighting the importance of innovative teaching approaches in the context of the COVID-19 pandemic. This study might influence educational policies and practices. Educational institutions can make informed decisions about emergency preparedness and development by assessing results using a creative approach. Our findings bring depth to the global conversation on higher Education under challenging circumstances, showing how Innovation might alleviate the adverse impacts on international students' learning experiences.
-
The Effect of Player Transfers on Football Companies Valuation
Views:492Transfer seasons are one of the most highlighted periods in world of football. The market of player rights forces the greatest european clubs with their enormous budgets to compete with each other in order to aquire the most talented and most succesful players. It is not uncommon to sign players for tens of millions of euros, to this extent these expenditures are seriously affecting clubs bottom line. However, despite the expenditure nature of player transfers the value of these clubs increase, based on the best known measurer for companies valuation: the stock exchange. In my research the effect of player transfers ont he valuation of football corporations are presented through market value development of stock market listed clubs namely Juventus and BVB Dortmund. Based on my results if the examined clubs were signing players according to a player transfer policy considered as succesful the value of examined clubs had increased through stock market price independently of player transfer balance. Moreover the effect of coronavirus could had been noticed, since both clubs valuation decreased heavily in the 2020 summer transfer window probably due to the revenue loss caused by the pandemic.
-
Investigation of application and development of precision irrigation technology
239-248Views:403Due to the extreme weather conditions irrigation is nowadays considered an increasingly necessary factor. After evaluating the water requirements of the plant and the available water resources is necessary to decide what irrigation method to use. One of the most commonly used methods in field conditions is rain-type irrigation, of which there are several types (eg linear, winding drum). The uniformity of the field nozzles can be characterized by the Christiansen uniformity factor (CU%) and the distribution uniformity factor (DU%). The coefficients can be derived from the volume of water captured by the rain gauges. Our investigations were carried out in July and August 2019 at the University of Debrecen's Vision Plant Experimental Plant and at a linear irrigation equipment of a Nyírbátor company. The aim of the study was to compare the uniformity of water dispersion applied by conventional linear technology and precision linear irrigation technology. In addition we examined the intercept values of maize.
-
The Methods of Determination of Settlement’s Electricity Self-Sufficiency
1-15Views:283The Idea of the Energy Change became in available proximity with the technological development. The change from the fossil energy to the renewable energy sources is a question of the territorial extension’s question now, so the change is available on settlement, regional, or global level. This study analyses the method of those settlement systems, which achieved the 100% renewable energy systems. It categorizes the methods which lead to the all renewable energy supply based system and the current study examines the self-sufficiency level of the Hungarian settlements through the international organizations and case studies and applying its own methods.
-
The Logistics Conception of the Value Chain of Wood
139-154Views:347The importance of the forest management and timber producing is highly determined by the value chain of timber. The forest management and timber producing can basically contribute to achieve the goals of the sustainable development as producing and processing the wood as a raw material. The relationship of the multifunctional forestry management as producing different scale of products and services results that changing a member of the chain might cause the total net alternation of the forestry system’s added value. The added value of the special areas of the appropriate and sustainable forest management is the infrastructural, recreational and touristic services.
-
Investigation of Parental Roles in Relation to Youth Football
105-114Views:381My research is based on the fact that, thanks to the development of sports and the capital flowing into the sector, youth sports are no longer just a useful way of spending free time for children and a mean for educating them for a healthy lifestyle, but also an opportunity to lay the foundation for an adult sports career and, with it, secure future existence. In order for the training to be effective and productive, one of the many components is the existence of parental support. Youth competitive sports pose many challenges for a family and influence their lives from several aspects. In my research, I examined how youth sports affects parents in terms of certain demographic variables, what changes it generates in their family life, and I also paid attention to what expectations the family has about sports. The basis of the study is an online questionnaire survey, which was filled out by more than 700 parents of youth football associations. My research revealed that, in accordance with the previous literature related to the topic, their children's sports have a significant impact on the lives of the parents and they set different expectations regarding it, which are also influenced by various social and demographic factors.
-
Opportunities in circular agriculture
17-23Views:412Water is the source of life. For the long-term preservation of water resources it is very important to develop sewerage and sewage treatment. Sewage sludge is not primarily a waste that needs to be disposed of but also a secondary raw material or a renewable energy source. Municipal sewage sludge, and sewage sludge composts, contain relatively large quantities of organic matter, so agricultural utilization can be a major potential of its use. The transition to sustainable agriculture is becoming more urgent and increasingly important as it can provide a solution that looks to the future. Sustainable agriculture should work according to natural law, so it should be self-sustaining, that means, cycles, where in to one process the waste created can be used as raw material in the other process. The beneficial effects of sludge on soil include increasing soil organic matter content, increasing soil fertility, nutritional capacity, microbiological activity, and complex fertilizing effects. However, when is applicated, there is always a problem with the occurrence and accumulation of toxic elements and drug residues. The traditional model of economic activity is the linear model. This model ignores the high economic social, and environmental costs of exploiting, transforming and removing of the resources therefore it is not sustainable in the long term. The circular economy offers an alternative model in which the products materials and resources are maintaned as long as possible and the amount of waste is significantly reduced or lost. It is also possible adapt the overtuned ecological, biological balance of agricultural production systems, with a closed loop circular model. According to this model, the development of tillage technologies and the restoration of organic materials and nutrient supply are possible.
-
Quality Indexes of Warehouse Services
1-13Views:614There was a wide range and rapid development in the field of warehouse management in the recent decades as a result of strong and spectacular improvement of establishing and operating warehouses, in addition to increasingly complex logistic processes. In my research, I analysed the complex problems of determining the performance expectedfromoperatingthewarehousetechnologicalsystem. Thisdecisioninvolvestheselection of the essential performance indicators suitable for performance measurement and the determination of the expected performance level based on these indicators through the example of an examined enterprise. During my research, I concluded that the logistic performance measurement of warehouse processes is a very difficult process, because all enterprises have to define and use indexes which adapt to the enterprise profile well and reflect the performance to be measured. This decision is of key importance, since the warehouse system and its operation principles have to be adjusted to this expected performance.
-
Simulation of Hot Rolling by Cellular Automata
190-195Views:344Our research is focusing to one of the most complex and important production step of flat rolled products that is the simulation of hot rolling. During hot rolling two phenomena as work hardening and the process of regeneration of crystals has strong influence for physical properties of microstructure of aluminium alloys. It needs to be taken into account in case of rolling technology steps and development. When we talk about aluminium the dynamic softening in fact it is dynamic recovery that is followed by dynamic recrystallization. It goes in the same order of magnitude rate. But in steels the recovery has only a minor effect. Hot rolled and newly modified grain structure is influenced by these dynamic phenomena. Hot rolled grain structure goes through significant changes under further production steps like cold rolling and heat treatments. But aside from these intermediate production steps the microstructure that we get after hot rolling has significant effect for mechanical and grains structure of the final flat rolled product. Proper technology planning is essential that for cellular automata simulation method can ensure useable and good solution for the simulation of recrystallization.
-
„Return to the Countryside” – a Qualitative Approach of Students’ Opinions About Rural Life
204-216Views:370Nowadays, the research of rural areas’ specific features is one of the most interesting part of sociology. Within these studies the rural areas ability for survival and to retain forms an important basis. A pillar of these, that the youth from rural areas become sufficiently motivated to stay at or to return to their homeland and be able to redound development. We were looking for answers, that how university students, who participated in our current research are thinking about the hungarian countryside, in their opinion what are it’s advantages and disadvantages and it’s possible potentials. In addition, we examined those factors, which are contributing to that respondents who are studying in large cities want to stay there, but at the same time we wanted to explore the opposite factors, those that make tudents to return to the countryside. Last, but not least we investigated a very interesting topic, the relations between the respondents and the rural elite.
-
Six Sigma in preconstruction: case study on improving of reinforcement steel processing
49-60Views:319Lean process improvements are crucial for enhancing production efficiency. In my research, I examine the application of the DMAIC methodology to develop the MEP facility within the framework of lean Six Sigma. Highlighting the challenges of precast concrete production, my study details how lean management aids in efficient process design and measurement. Introducing lean Six Sigma methodology involves standardizing processes and ensuring their effective development, contributing to the facility's efficiency
-
Comparison of R&D innovation indicators of the visegrád group
162-172Views:223Innovation is a crucial strategic issue not only for businesses to maintain and improve competitiveness, but also has paramount role at a macroeconomic level how a national economy is able to contribute to the national division of labour. Innovation and research and development are particular and even more crucial in post-socialist countries which are trying to catch up with Western Europe in an economic point of view. We compared countries in the Visegrád Group in the study regarding their innovation indexes, R&D indicators and corporate innovations. These indicate that countries in the Visegrád Group are lagging behind the European Union. The Czech Republic ranks the first place in almost each aspect among the countries in the Visegrád Group. As for time series indicators, there is a steadily improving tendency in R&D. Regarding measuring innovation and R&D, it can be concluded that perfect method and scorecard are not available, indexes based on varying methods may generate different results and decision taking only one index into consideration cannot be made in business practice. In my opinion, R&D indicators are dominant to a large extent in comprehensive innovation indexes that might be misleading in the assessment of innovation (particularly in corporate innovation).
-
Qualitative and Quantitative Analysis of Optical Industry Produced Grey Water, Proposal For Treatment Technology
84-88Views:205Our research we investigated Carl Zeiss Vision Hungary Kft. grey water from laundry. Our research aims to provide the optical industry produced grey water quality and quantity parameters to obtain a comprehensive picture. The quality parameters for additional aim was to test, whether it is worth tut collect grey water produced in the optical industry to the place of origin. Subsequently, the development of a treatment technology that economically it would be valuable for the company. It has been observed that it is not necessary tut collect grey water from washing machines and cleaning machinery, since it is similar to the organic load them. It was based on a financial assessment of the grey water treatment technologies in two technologies: coagulation-flocculation and aerobic bio membran technology. Investment and maintenance costs in respect of the implementation of the aerobic clearly bio membran technology proved to be more economical.
-
Local Annealing of Cold Rolled Aluminum Sheets by LASER Treatment
21-26Views:257LASER treatment widely used in material processing technologies. The annealing is not the typical application of the LASER treatment, but this is possible to apply in case of cold deformed metals. In the article a cold rolled EN AW 8006 aluminum sheet is annealed by LASER treatment. The microstructure of the annealed sheets is observed by optical microscopy. An existing cellular automata simulation of recrystallization process is modified to study the LASER annealing. The observed microstructure and the simulated results are compared to determine the further development of the developed automaton.
-
Sport Consumption, Fan Engagement, Sport Statistics – Post-specific Passing Characteristics in Football
Views:878Digitalization and the explosive development of technology have led to significant changes in football. Due to the increasing amount of data available through various sensors and other data collections, we can observe the rise of data-centric, analytical and statistically oriented thinking in football, which is also of interest to fans. Digitalisation is also closely linked to sports consumption, which is why we have seen significant changes in this area in recent years. The pandemic has further amplified the speed of digital transformation in the sports industry. One of the most important contents for sports organizations and their fans is the in-depth sports statistics and analysis that enhances the consumer experience. In our study, we examined the most common performance indicator in football, passing. Our goal was to examine the position-specific pass characteristics in detail, therefore we also examined different pass properties in our research. As a model for our analysis, I chose the premier league, which has the highest UEFA coefficient. The three rounds (rounds 30-32) of the championship season 2019/2020 have been recorded and analyzed in terms of passes. there was a significant difference between the average number of passes per game between defensive and offensive players (t=7,988, p<0.05). There is also a gradual decrease in the number of passes attempted per match and the accuracy of the pass in the examination of the middle positions when examining the positions in the depth of the pitch. For both pass accuracy and average pass count, the decreasing ranking corresponds to the position of positions on the pitch (order: 1, central defender 2, defensive midfielder 3, inside midfielder 4, attacking midfielder 5, striker). In the value indicator of the position for passes, offensive positions performed more effectively than defensive positions. The extreme positions also stand out among the attacking positions, where in the case of the position value per pass number, 23.3% of the total test was completed and 14% of the amount of the established position value indicators was provided by these posts. Overall, our study points to post-specific pass characteristics and, knowing this, we can state that the comparison of players' passing performance is relevant if the players are in the same or related positions.
-
Analysis of the Supply of Sport Services by Organizational Aspects
465-474Views:445The spread of consumer societies has led to the commercialization, and the emergence of profit-oriented operating frameworks in the fields of sport. The sports enterprises, involved in the operation of competing groups on professional, spectator fields of sport have already been examined from legal, economic, organizational points of view by a number of international and Hungarian researchers. In this article, we attempt to cover and summarize the Hungarian research approaches on this subject. The motive behind our investigation is that we should launch an organizational examination of the Hungarian profit-oriented sports suppliers in the near future. We plan to analyse the property, financial, income, organizational, management and labor management related situation of these sports enterprises. In order to ground the research, the review nature summary of domestic economic, organization science related secondary examinations is essential, which allows the development of the appropriate research methodology and the comparison of our results with the antecedents.
-
The Special Aspects of Leasing as Long-Term Asset Financing Method in Hungary
115-128Views:809Leasing has become widespread in the world in the 1970s, while in Hungary the first leasing firms appeared in the 1990s. The authors in this article introduce the most prevailing and most often used forms of leasing and their main characteristics in Hungary. Based on the statistical data of the 2008-2015 period the authors analyse the performance of investments, the volume of trade in the total leasing market and the course of the amount of capital assets and new capital investments on the level of the national economy. The conclusion of the current article is that the changes of the investment’s performance in the national economy and the EU development funds influence greatly the course of the Hungarian leasing market.
-
Digital Twin and Shadow in Smart Pork Fetteners
515-520Views:454This paper introduces our ongoing research in the field of smart livestock farming. The base idea in this research is to take some industry based concepts, and adapt them into agriculture. In Industry we live the fourth industrial revolution, which is not a technical, but an organization revolution. So in this concept there are two key ideas, which are digital twin, and digital shadow. This article is about creating digital twin and digital shadow of a modern pig fattener. These models are based on the literature, and are identified on the data shared in these. However, these models can’t be used on real systems before identifying them on the actual circumstances. At this stage of research only digital twin of the product was created, and only some aspects of it. This however can simulate an average porkers feed consumption, weight growth and calculate the weight on certain stages of breeding. Further development is ongoing and our target is to make a fully functional model of a pig fattener.
-
The Location of Energy Plantations in the Sowing Structure and Its Evaluation with Linear Programming
255-269Views:230The research is examining traditional arable crops and woody plants on the basis of their marginal contribution. Calculations of income, expenditure and revenue were made on the grounds of sectoral technologies, which were the basis of the value of marginal contribution of the given sectors. As the linear programming model is quite comprehensive, we used this method for our calculations. To compile our model, we have gathered all the necessary information from farmers of the region of the Northern Great Plain. The missing data was completed from the databases of the Hungarian Central Statistical Office (KSH), Institute for Agricultural Economics Research and Information Technologies (AKII) and the Statistical Office of the European Communities (EUROSTAT). In some cases, we also used data of the Agricultural Administration Office and the Ministry of Agricultural and Rural Development. Our goal is to compile a 12-year production structure that suits for the characteristics of the region of the Northern Great Plain by achieving the maximum marginal contribution of a feature-farm.
-
Dynamic Tests on a Series Wound DC Motor. Simulation of the Braking of the Vehicle Driven by the Motor
15-20Views:220In the following we present the role and contribution of vehicle dynamics simulation to vehicle development in the University of Debrecen Faculty of Engineering. We present the input technical parameters which are necessary for the simulation of the series wound DC motor – which drives the vehicle – and also the procedure for their measurement together with the results of dynamic test measurements on the motor. The latest version of our vehicle dynamics simulation program –which is capable of the simulation of braking too – is also presented here.
