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Introduction to Design and Analysis of Torsional Vibration Dampers in Vehicle Industry
310-324Views:343The crankshaft of today’s internal combustion engines with high performance output are exposed to harmful torsional oscillations originated from the unbalanced gas and inertial forces. To avoid the fatigue damage of engine components, caused by the undesired vibrations, torsional vibration dampers can be applied. Viscodampers are one type of the torsional vibration dampers, which operational fluid is silicone oil. For cost-effective R&D activities and production, finite element and finite volume numerical discretization methods based calculation techniques must be involved into the engineering work supported by the modern computer technology. The aim of this paper is to provide an insight into the multidisciplinary design and development process of visco-dampers in vehicle industry applications. Four different examples as structural, fatigue, CFD analyses and structural optimization have been introduced in the present work. It turned out from the static structural and fatigue analyses, that the investigated damper has safety factor over the limit for both static structural and fatigue analyses, so it is suitable for the given load conditions. In the structural optimization process 34.36% mass reduction has been achieved. According to the coupled fluid dynamic and heat transfer simulations a rather stagnating air zone evolved between the engine and the damper during the operation, which can cause efficiency reduction of cooling fins mounted onto the housing. In light of the numerical results, the suitable damper position has been determined for the highest heat transfer.
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Digitalization Process by Agricultural Companies, or the Results of a Questionnaire Survey
625-636Views:261The term “information society” first appeared in Japanese social science in the early 1960s (Z. Karvalics, 2007). The interpretation of the concept has undergone significant changes over the past decades, showing that dynamically developing societies, which are undergoing constant changes due to the rapid development of information, information management and the dynamism of the digital world. The close relationship and connection between information and information technology has become a fundamental factor in the societies of today, the organizations life, which generates inevitable, sometimes serious debates and profound changes. Economic operators must necessarily be resilient to technological change. We should think of the time of the Industrial Revolution, when modern weaving machines flooded the factories. Otherwise, a resilient organization will not survive in an evolving and ever-changing dynamic economic environment. Of course, this is true of agriculture as well, just as it is for other sectors of the national economy. On the one hand, my assumption on the basis of which my questionnaire was compiled was that enterprise management systems are increasingly used by enterprises in agriculture due to the diversification of activities. At the same time, I assumed that the size of a business could influence the use of information technology (hereinafter IT), so I hoped that my research would provide reliable data on this as well.
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Opportunities for Keeping Talent Highlighting Career Needs
31-43Views:447Organizations should focus not only on finding a workforce, but also on finding a talented employee and to be able to keep them. That is why we considered it important to pay attention to talents and careers. In this paper, we attempt to identify those factors which are important for career prospects among future employees and those already in the workforce. Moreover, we want to identify the factors which those who are already employed consider to be factors influencing their career prospects. We conducted a survey of students using questionnaires. 116 questionnaires were completed, of which 73 were filled in by BSc / BA students and 43 by Msc / MA students. We sought to discover to what degree the respondents considered the career factors we presented them with as influencing their ability to acquire an ideal job, as well as to what degree the same career factors would be able to assist them in their future career advancement. Presently, in their roles as students seeking gainful employment, important factors include perseverance, diligence, knowledge, and aptitude, all of which the respondents feel will become even more important in making their later advancement possible. At present, they do not consider the support of companions / partners and morality important; but they consider the support they receive from their colleagues to be a factor which grows in importance over time. In the questionnaire survey of employees, we were looking for two answers. On the one hand, which factors are important in shaping their careers, and on the other hand, at the workplace, which factors were related to employee retention and satisfaction. For their careers, they consider it important to have diligence, morality, and the support of colleagues. These results are similar to the views expressed by the students. However, those who already work consider ‘kissing up to the boss’ to be more important for their advancement possibilities than the students did. The responses concerning factors contributing to successful employee retention brought interesting results. Factors that are most commonly fulfilled, such as a good co-worker relationship and the working relationship with a leader, are barely above the average score of 4, which is actually a result that is above average. Medium results include the realization of independence, challenging work, fair pay and career prospects factors, all of whcih would be vital for talented people to experience flow in their careers. In the long term, leaders and HR professionals need to pay attention to take calculated, equisite steps to keep talented workers.
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Numerical Model Analysis of Natural Gas Combustion Burners
67-71Views:159Traditional power plants still the dominating power source for all the major industries and powerdemanding facilities, the most crucial facility for the whole plant operations is the industrial boiler which generatessteam, heating energy or electrical power. Boilers generate energy by combustion. The improvement of combustion efficiency could greatly influence the energy consumption and will make the boiler more efficient and cleaner (less emissions), that’s why it is important to understand the combustion and thermal flow behaviours inside the boiler. Beside experimental testing, computational work nowadays becoming more and more important due to lower cost and acceptable accuracy with minimum error. With numerical calculations method, the computational model created by a Computational Fluid Dynamics (CFD) software could reduce a lot of trial and error on experimental work. In this paper utilizing the ANSYS FLUENT 19.1 software to make crate the combustion model. The ratio of air to fuel mixture, the equivalency factor, mass flow rate of the mixture, velocity, mass fractions of the mixture components (fuel and air) and their temperatures will serve as the input parameter while the exhaust gase component mass fraction, temperature, mass flow and velocity will be monitored.
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Labor market effects of health promotion on human capital
591-602Views:486Today, workplace health promotion is increasingly present, both domestically and internationally. In my research, I used literature analysis to show how workplace health promotion programs, including physical activity, how affect employee earning capacity and productivity. Human capital is a significant factor in productivity. Human capital can be defined, that the human inner, inseparable features and characteristics of a person to which is invested and, as a result, increases the productivity of the individual. Investments can include health spending (health promotion programs), costs of extra-curricular lessons and time to find the ideal job.
I’ve been used secondary data collection during my research. In my research I have reviewed the source of literature on health promotion and physical activity primarily. After reviewing the literature, consequence of the research that investing in health, including investing in physical activity, it also contributes to improving health, as well as increasing life earnings and productivity at work.
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Experiences of Innovation Projects in the Light of the „European Paradox”
563-578Views:116Corporate innovation can be a major factor in economic development and long-term high-level corporate performance. The position of the EU in international innovation rankings has not improved since the 2000 2009 period; though there has been a more positive trend since 2010, meeting the Lisbon goals, the EU is still not at the forefront in terms of R&D&I. Behind this process is the rapid progress of some industrially developing nations in R&D&I, as well as the relatively slow institutional development of national innovation systems in Europe. The relative lag in Europe can be explained by the frequently referred to “European paradox”, which is still unclear for methodological reasons. Firstly we consider the international ranking in innovation, then discuss one of the explanations put forth to explain this rather weak performance. We present case study that represent Hungarian experiences with corporate innovation.
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Company Valuation of an Entity Operating in International Accounting Environment
320-331Views:598Company and asset valuation plays a major role nowadays. Determining the company’s value is a key factor for management in appropriate decision making, and it is a necessary step for individuals who wish to invest and for investors. There are numerous models which utilize different methods for company valuation. In our study we based our valuation on the McKinsey model for a company in an international accounting environment. In the study we present the main attributes of the McKinley model, its structure, which includes the main steps of valuation. We put a special emphasis on the calculation of free cash flow, future balance sheets and profit and loss accounts anticipation as well as future turnover, which highly influences the changes of data in the future reports thus in the company value. The McKinsey model is a discounted cash flow model, in which the company value and the consequent future cash flow can be determined as present value.
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The Efficiency of Intellectual Capital as a Crucial Factor of Innovation
419-428Views:262In today's global economy, there is a substantial shift from manufacturing to services, which challenges both economic policymakers, business stakeholders, owners, suppliers, competitors, and ordinary people: restructuring will encourage all economic players to learn how to adapt to new trends. That is why our research focuses on innovation and the ability of companies to create value. The IT sector is currently one of the fastest-growing and most innovative sectors within the service industry. The success of IT companies is greatly determined by their ability, how to make effective use of their intangible assets at their disposal, including intellectual capital, which is defined as a non-financial asset. So the question may arise: how is it possible to quantify and in monetary terms the intellectual capital of the companies to be examined? That is why, we calculated for the most successful Hungarian IT companies the widely recognized index, the VAICTM index, for which domestic calculations are not yet available. Indeed, this indicator eliminates the lack of information stemming from reporting standards by the methodology relying on publicly available financial reporting data. The indicator itself is a top indicator whose two main sub-indicators quantify the effectiveness of intellectual capital and physical capital.
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Topology Optimization of Acetabular Cup by Finite Element Simulation
22-34Views:438Hip replacements typically consist of a four-part piece. Our research will focus primarily on the acetabular component. Several different types of materials can be used when creating a hip replacement implant ranging from plastic to titanium. Different materials are used to accommodate for allergic reactions or circumventing potential health risks. Aside from the material, the size of the components plays a factor in terms of durability; a larger diameter head might avoid dislodgement though it could increase wear and tear on the stems through constant friction. A patient’s force applied to the hip replacement is usually measured through a number of physical assessments. Finite element analysis (FEA), a computer-based method of data observation, allows for us to accurately simulate hip forces and their impact on the hip replacements. Through this, it becomes easier to predict and calculate the performance of specific designs. Generative systems can also be used to support performance analysis and optimization through assessing a multitude of cases, many of which apply in real-world scenarios. By applying both systems, we designed and modeled an acetabular cup that when measured decreased the mass from 129 grams initially down to 52 grams, a 60% decrease in total mass. Furthermore, the design we created lessened the trauma on the piece through distributing force across the entirety of the piece rather than specific segments only. This shows an increased durability and life expectancy when compared to usual acetabular cups.
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A vállalati vagyon és a finanszírozás összefüggései a vagyonértékelés szempontrendszere szerint
69-79Views:220The availability for financial sources can be the key factor of competitiveness of enterprises. Under favourable conditions it can result in not only economic growth and conjunctural effects but indirectly it also has a positive influence on social level as well. In the first part of the article we make an overview on enterprise financing in both social and economic context and try to give an overall concept. In the second part we analyse the framework of financing, discuss the national and international specifications of financing, and finally, in the third part we analyse the background of enterprise financing based on the principles of asset appraisal.
