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Utilization of 3D Printing in Replacement of Basic Plastic Workpieces
274-282Views:197In the experiment, a 3D printed cogwheel is made using the FDM technology to replace a broken part in a sewing machine. The aim of the project is to examine if a 3D model can be created and manufactured using only entry-level technical knowledge and tools. By the end of the article, it will be apparent that creating functioning plastic parts with a hobby 3D printer and basic CAD experience is very much possible.
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Developing of Capacity Analysis Method
1-19Views:323Capacity planning is strategic significance in companies’ life. The strategic of capacity enlarging in fluencies the competitiveness of companies. There are several method for determination of long-term capacity from simple ones to expensive, high calculation requiring processes. We have to rearrange the production for the increasing demand, it is not so simple because it needs some investments. We must scrutinize that is it worth for us? The aim of this study is to investigate whether capacity enlarging is going to be realizable without investments only the eliminate of waste. In this method needs exact determine of the current capacity so we use modified, extended capacity model. In this model we consider the availability, quality and efficiency of the machine more over we observe the effect of the service program of the machine.
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The Impact of Optical Character Recognition Artificial Intelligence on the Labour Market
9-16Views:349Because of present day information technology, there is neither need to plant complicated computers for more millions price if we would like to process and store big amounts of data, nor modelling them. The microprocessors and CPUs produced nowadays by that kind of technology and calculating capacity could not have been imagined 10 years before. We can store, process and display more and more data. In addition to this level of data processing capacity, programs and applications using machine learning are also gaining ground. During machine learning, biologically inspired simulations are performed by using artificial neural networks to able to solve any kind of problems that can be solved by computers. The development of information technology is causing rapid and radical changes in technology, which require not only the digital adaptation of users, but also the adaptation of certain employment policy and labour market solutions. Artificial intelligence can fundamentally question individual labour law relations: in addition to reducing the living workforce, it forces new employee competencies. This is also indicated by the Supiot report published in 1998, the basic assumption of which was that the social and economic regulatory model on which labour law is based is in crisis.
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An Economical Mathematics Model
39-44Views:83In the frame of the project NTP-NFTÖ-17-C-159, one of my main tasks is to present the possible applications of teaching mathematics in high schools and in higher education. Beside this, I would like to illustrate that, in many cases, how useful and, in certain cases, indispensable the use of mathemathical softwares is during the solution of a complex problem.
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Survey of the Dynamic Modeling Methods of Light Vehicles
723-727Views:208Vehicle dynamics models can be classified into two groups based on the model simplification. There are simplified models based on neglections, these models do not contain all body directions: longitudinal, lateral and vertical directions. There are several reasons for the simplification: control, estimation and analysis methods can be used only with simplified models, or another reason is the computational cost. Apart from simplified models, there are detailed/truth vehicle dynamics models which aim is to provide a virtual plant of the real vehicle for virtual prototype-based development. In this paper, some simplified vehicle models are presented, after a short introduction.
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Analysis of Social Media Activities - Through the Examination of Handball Clubs Competing at Different Levels
39-53Views:241In Hungary, handball enjoys special attention and support, this is true not only for our country, but also for Europe, and the sport is gaining more and more space worldwide. One of the biggest innovations of the last two decades is certainly social media, which has reformed the basic strategies related to information transfer and traditional marketing activities. The processes of content production on these platforms have radically changed, which every sports club should pay attention to, as they can gain significant advantages in terms of economics, marketing and community building if they are able to communicate well. Three sports clubs competing at different levels were compared during a qualitative study in terms of their social media marketing strategy activities, namely PICK Szeged, Balatonfüredi KSE – BFKA Balatonfüred and DEAC handball team. The basic concept of this research model was built on how the online marketing communication activities of club teams fighting for different professional goals at different levels differ from each other, as well as what are the development opportunities and aspects that can be used as effectively as possible on social media platforms. The handball club teams agreed on several research questions, but a significant difference could also be discovered in one area, in which the professionals responsible for social media disagreed or represented a different point of view. Looking at my results, it can be concluded that behind a successful online marketing strategy there is always serious preparation and planning work, as well as the diversification of content production on different platforms, because the consumer communities of the platforms are also different from each other.
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Examining the Movement Differences in the Behavior of Normal and Rack Railway Vehicle
96-103Views:260The rack railway is a special type of railroad. There weren”t much built worldwide, and their number is decreasing. Now, in Budapest, there is a possibility to create an interoperable vehicle, based upon the experience gained from the previously operated line, and all the research regarding its unique characteristics. One from the many important sector of its operation, is the rail/rack/vehicle system. Its mechanical model is far more complex than a traditional railroad vehicle. We will demonstrate its behaviorial differences from a traditional railroad vehicle.
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Parameter Estimation of Drag Coefficient and Rolling Resistance of Vehicles Based on GPS Speed Data
109-115Views:146In this paper, a parameter estimation method of the model-based design approach is applied to estimate the drag coefficient and the rolling resistance coefficient of a vehicle. In fact, a constant-force parameter (c_const) and a velocity-square-force parameter (c_square) are in the vehicle model, and these result in the sum force applied along the translational DOF that models the vehicle. It is only an assumption that the constant force is the rolling resistance and the force proportional to the square of the velocity is the drag force of the air. Only GPS speed data is used for the estimation process. The conclusion is that parameter estimation is a good alternative when expensive measurement devices are not available to measure the force losses separately and directly.
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Micromechanical Model of Dry Friction Hybrid Polymer Composite Clutch Facings
335-340Views:88Modelling the complex coupled thermomechanical and tribological contact of a dry friction clutch system between cast iron flywheel and scatter-wound hybrid composite clutch facing requires a thought through investigation of the friction material properties and behaviour. Challenges of the creation of a mechanical stiffness matrix for such a complex material are described in this paper along with simplification ideas and solutions.
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Visual Analysis and Geometric Modeling of Metal Foams
89-92Views:101The 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. -
Analysis of Activity Times in the Process of a Wooden Box Manufacturing
475-484Views:119The main target of companies is to earn money and achieve profit. In order to fulfil these needs, companies have to reduce their costs. Cost reduction is often associated with bad quality products, but it could be done in a different way. Sometimes it is enough to examine only their own processes and then benefit from the process optimization, process improvement or process scheduling. In this article a case study is presented, in which the differences in a production scheduling are evaluated with the application of Monte-Carlo simulation and descriptive statistics. At the end of the paper the most efficient material sequence is selected at the manufacturing company by using weighted sum model
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Digital Twin and Shadow in Smart Pork Fetteners
515-520Views:276This 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.
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Kinematics and Control of a Planar Cable Robot
88-95Views:131This paper deals with the kinematics and control of a planar cable robot [1], which is driven by four DC motors with gear. Cable robots are frequently used e.g., for the motion of cameras in sport halls and stadiums and also in high storage logistical systems [2]. Main goal of this research work is to design and build a test bench with low budget, which can model the motion of real life cable robots.
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Floodresc – Disaster Management in case of Flooding in the Hernad Watershed
181-187Views:96The aim of the Floodresc project is to develop a GIS based decision support system that can help the defense and rescue operations of the Disaster Management Directorate during any floods in the Hernád River. In the project, a geospatial database covering the entire river basin, a modeling application for predicting the extent of flooded areas in time, and a logistics model supporting defense-related transportation tasks will be developed.
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Fémhabstruktúrák elemzése és geometriai modellezése
145-152Views:121The 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
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Comparative Analysis of Collaborative Robots
1-16Views:168In our study, we provided a comparison of four robot arms used in industry to determine the most suitable model to adopt in university education. We investigated robot arms from the following manufacturers: ABB, Kuka, Universal Robots, and Techman Robot. The multi-criteria system was grounded on the important factor and experience. Following this, each aspect was ranked using the Analytical Hierarchy Process (AHP) method. In addition, the order among the four alternatives was established by using the Kesselring method. The present study describes a selection method for industrial robots in the academic area.
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The Sustain of the Leadership Methodology in Higher Education
1-11Views:133Higher education institutions have to follow the changes of current higher education and market oriented atmosphere. All these changes have to be measured and probably reacted to. Leaders of higher education instutions should have personal skills, which can contribute to the efficiency therefore they can motivate their colleagues. The aim of this study is to unfold the most effective measuring model to determine the leadership competencies, behaviours, properties, which can contribute to the successful operation and to the subsistence of experienced competition in higher education.
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Examining Organisational Culture with OCAI among Technical Management BSc Students of the University of Debrecen
1-8Views:323Based on the OCAI model, our study analyses and compares two things (1) the corporate culture of the University of Debrecen Faculty of Engineering as it is perceived by its engineering management students; and (2) the culture they think would be ideal. According to the respondents the existing culture is closer to the clan type and further from the market type compared to the average. Their ideal culture is closer to the clan, adhocracy and further from the market (compared to the average). The perceived current and the ideal culture are significantly different only in the adhocracy type. From the 20 items of the OCAI questionnaire 7 were significantly different from the average in the case of the perceived culture and 13 in the case of the ideal culture. Differences between ideal and present cultures are statistically supported only in the following dimensions: dominant characteristics (clan is currently stronger, adhocracy is weaker), corporate leadership (market is currently stronger), strategic emphasis (hierarchy is currently stronger).
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The Middle East perspective of Corporate Social Responsibility
282-291Views:231Corporate social responsibility (CSR) in the Middle East is gaining more importance than in the past. Although it still remains more about philanthropy and charity, it moves towards a more strategic approach which includes formalizing ways of giving, as a set of non-random actions, and focuses more on addressing social ills and environment, economic challenges, that are hindering development. However, the business in the region has not yet taken the step to fully integrate the CSR into their core business operations. The most common challenges that facing the CSR implementation are the lack of government requirements and incentives, spreading awareness, building CSR partnership model, going beyond the marketing and PR campaigns, and full integration of CSR into the business strategy. In this paper, we aim to introduce the current state of the CSR in the Middle East and its perspectives, besides reviewing its evaluation stages, motivations, and current challenges. Moreover, we aim to examine CSR common practices through examples from the financial sector. The research method applied in this research is based on secondary data sources and we have used desk research to illustrate most important points and findings on the topic.
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The Individual, Education or Work Environment Influences the Quality of Graduates’ Employment?
244-260Views:181In this paper I examine what has an effect on the quality of the graduated students’ employment. The quality is measured by the the discrepancy between the educational attainment of workers and the educational requirements of their job. On the base of this I can distinguish matching and overeducated workers. The latter category can be divided into two other groups, so called genuinely overeducated, who are not satisfied with their mismatch, and apparently overeducated, who are satisfied with their mismatch. Using multinomial logit model I try to identify those individual, educational and workplace’s characteristics that influence being matching, apparently, or genuinely overeducated using the database of students graduated in 2007 and 2009 in the University of Debrecen. I try to test those factors that were determined in the literature like mobility and commuting propensity, market rigidity, career mobility, job tenure.
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Practical Application of Methods in Strategy-Based Analyzes
59-72Views:458Increasing environmental volatility is a growing challenge for companies and businesses. The speed of economic events is changing, and the risk of uncertainty is increasing, requiring business to take a new approach to strategic planning. In the design and forming of their strategy, both the factors of the external and internal environment and the analysis of their competitors can be based on well-chosen methods. We consider the review of these methods, their application in planning and educational practice. The aim of our work, in which we present the methods that underpin the strategy applied in both domestic and international practice. The analysis of the external environment illustrates the construction and applicability of an external factor analysis matrix based on traditional PEST analysis and the Porter's five-factor model. In the case of internal factor analysis matrix, we focus on the approach of method choice, and on the applicable methods, the importance of the resource-based approach, the analysis of key factors and the Porter value chain analysis matrix. The third pillar of the analysis that underpins the strategy is the matrix-based assessment of competitors. The applicability of the methods depends on the form of the enterprise, the field of activity and the nature of its activities, which is complicated by the emergence of new economic spheres (e.g.: sharing) and transformed power relations.
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Constantly Changing: Revitalization of Our Existing Building Stock with a User-centric Approach Through the Comparison of Three Hungarian Examples
94-110Views:533Our built environment’s community-oriented spaces are rapidly becoming obsolete in response to current social, cultural and economic demands. The renovation project of the tímárház Szárító műhely in Debrecen presents a new potentional transformation model in the region with a focus on community-creating and cultural awareness. The incremental, cost-effective small-scale intervention and adaptive reuse of the building’s spaces provide an opportunity to preserve its values and swiftly respond to evolving needs. In order to validate the underlying principles of the interventions proposed in the plan, it will be compared to two similar-minded examples, the Művészeti Ellátó in Eger and Szabadkikötő in Pécs. The projects were examined through the processes occuring within their respective life cycles, as their transformations exhibit recurring patterns. The analyses were conducted based on interviews with the creators, online articles, studies and on-site visits.
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The CAD Modelling Possibilities of Gear Pairs by Two Ways in the Mechanical Engineering Practice
205-219Views:129The GearTeq 2021 software is a complex gear designer software which is capable to design different types of gears based on the initial geometric parameters by the user. Naturally, the users’ appropriate knowledge for the gear theorem and the manufacturing technology is indispensable for the design. The possibilities of the software are shown in this publication. The designed gear pairs are usable for different engineering fields (robots, working machines, vehicles, etc.).
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Numerical Model Analysis of Myring–Savonius wind turbines
180-185Views:172Nowadays the importance of renewable energy is growing, and the utilization of the low wind energy potential is getting crucial. There are turbines with low and high tip speed ratio. Turbines with low tip speed ratio such as the Savonius wind turbine can generate adequate amount of torque at low wind velocities. These types of turbines are also called drag machines. The geometry of the blade can greatly influence the efficiency of the device. With Computational Fluid Dynamics (CFD) method, several optimizations can be done before the production. In our paper the Savonius wind turbine blade geometry was based on the so-called Myring equation. The primary objective of this paper was to increase the power coefficient by modelling the effect of the wind on the turbine blade. For the sake of simplicity, a 2D cross-sectional area was investigated in the simulation with ANSYS CFX 19.1.
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Applicability of Optimization Methods in the Design of Automotive Rubber Products
358-363Views:148Size, shape or topology optimization are widely used to fulfil the requirements in the design process of rubber products. In many cases, the shape of the product is very complex and comes into contact with other components during operation. It is commonly subjected to large deformation for which the rubber shows strongly nonlinear behaviour. For this complex problem analytical solution is not available, thus finite element method could be used in which the analysis running is a time consuming process. The object of my research is to compare the efficiency and computational cost of different optimization algorithms. This article focuses on the applicability of various optimization methods in the field of automotive rubber goods. Direct search optimization and surrogate model optimization methods will be introduced.
