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Investigation of the Luxury Yachts Condition and Their Maintenance
95-105Views:201Surveying the condition of yachts and their maintenance is of great importance for their functionality and efficiency. Finding the right approaches, expertise at different levels, design benchmarking are essential for all yacht maintenance and security, resulting in crew and passenger safety. This report presents an evaluation and expertise in a real environment and documentation of decision-makers for the strength and functionality of a luxury motor yacht. For a good understanding of the problem, detailed photographic material has been documented showing in detail the required technical corrections. The research would be of interest to a wide range of yacht design and industry professionals, academic and research representatives, yacht users and all interested stakeholders.
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Maintenance Strategies and Life Cycle Costs of Renewable Energy Systems
106-116Views:141Life cycle costs are important factors in decisions on renewable energy investments. Since maintenance costs generally constitute a high portion of the life cycle costs, the maintenance strategy applied in a project can affect the bottom line significantly. The effective maintenance tools used in the production industry (e.g., diagnostics, condition monitoring, data management, integrated information systems, machine learning, and automated decision making) can be involved in planning and maintenance of renewable energy systems to gain the benefits of these approaches. In this paper the effects of maintenance strategies on life cycle costs are investigated and the benefits of up-to-date condition monitoring techniques are presented through case studies.
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Maintenance of Electric and Hybrid Vehicles
37-46Views:505An electric car is a vehicle powered by one or more electric engines, utilizing energy stored within batteries that are rechargeable. The first register of a usable electrical vehicle dates from 1880s. A hybrid vehicle incorporates two or more different power types, including, e.g., gasoline engines and electric motor. The goal in this work is to present the overall overview of the structure of the electric, hybrid and electric-hybrid vehicles, advantages and disadvantages of these types, the main points to focus when maintaining these and the challenges involved in its production and maintenance.
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Maintenance from the Work Safety Point of View
190-196Views:137Deterioration of the technical condition of plant equipment is a common phenomenon nowadays. According to the experience of authorities, all this contributes to the occurrence of malfunctions and accidents. Plants that operate with an inadequate conservation strategy are now nearing the end of their design life, thus posing an increased accident risk. Aging processes are often accelerated by the operator's underestimation of the effects of equipment stress and the extent of deterioration mechanisms, and the consequent inadequate design and operation of condition monitoring and maintenance procedures. The aim of our work is to examine trends in the light of modern maintenance optimization methods and, in connection with this, to make proposals for the optimization of maintenance scheduling for employers.
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Artificial Intelligence Possibilities in Vehicle Industry
148-154Views:300There have been several attempts during the last decades to extend the ranges of application of artificial intelligence. The aim of the development for AI is to replace human intelligence and experience. The ultimate aim for machines and vehicles is to run much more efficiently and with higher reliability than ever before. The Artificial Techniques (AI) used a wide range of expert systems to optimize problems. Hybrid intelligent management systems have become increasingly influential in artificial intelligence during the last decades. As a result, maintenance and fleet management systems have undergone significant development. By choosing adequate maintenance or operating strategy and taking user behaviour into consideration, these systems can not only increase the reliability and efficiency of vehicles but can also result in financial savings. The paper tries to discusses the applications of AI techniques in predictive maintenance and vehicle industry.
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New Method for Dynamic Tribological Test of Engineering Polymers
25-29Views:134In this article, tribological tests of Polyamide 6 (PA 6), Ultra High Molecular Weight Polyethylene (UHMW PE) and Polyoxymethylene copolymer (POM C) by a new testing method is introduced. The tribometer used in the test is capable for pin-on-disc measuring within all possible layout known in tribology practice, otherwise can be modified into special model of fatigue sliding test. The pin was a specimen made from examined materials, always in contact with a rotating metal disc under a normal load, which is usually static. However, since vibration exists in every practical scene as an important phenomenon, for instance in turning process, we added vibration load into the test. The supplement load is generated by a special-designed vibrating machine. Then properties of examined materials can be studied more profoundly under vibration load. As a result, different value of friction coefficient in static and vibration load have been discovered and taken into comparison.
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Municipal Geothermal Systems: Evaluation of Three Hungarian Cases
81-93Views:120Geothermal energy holds great potential for a sustainable future, as it is a clean and weather-independent form of energy. In addition to energy production, it can also serve the population of a region through direct use. In this paper, three municipal geothermal systems (Szarvas, Nagyszénás, Békéscsaba) in the same Hungarian region which have been recently installed or expanded are presented and analysed. Here, the direct usage of geothermal energy for heating purposes is a very important issue. The three systems show several differences and to some extent face different challenges in the various phases of the projects. Particular attention has been paid to engineering solutions to the problems that arise. The challenges, such as technical difficulties during installation, maintenance difficulties, or problems arising during operation are introduced. The strengths, weaknesses, opportunities, and threats of similar geothermal systems were summarized, based on the relevant literature. These points were evaluated by their appearance and characteristics in the examined systems. This study aims to provide insights, based on recently gained experiences, into geothermal projects, thus providing feedback and practical information for researchers and practitioners.
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Some Aspects to the Rehabilitation of the Vernacular Adobe Architecture
1-15Views:216In this paper, we are dealing with the heat-technical modeling, life cycle assessment and the conservation of the vernacular adobe wall house. One of our investigations is directed to the seasonal equalizing property of this wall structure. The reason of this choice of this topic can be found in the fact, that in the old Hungarian folk house construction, the abode wall was popular and a significant fraction of the people living in the countryside are still inhabit these old houses. The Hungarian winter is cold and followed normally by sizzling hot summer. The adobe wall construction is perfect for the local climatic conditions. Due to the on-going global warming up, the ecological importance of these wall constructions is becoming more prominent. Most of these adobe wall constructed houses are already under preservation order, due to their ecological significance and also because they are part of our culture heritage. Their conservation and maintenance problems are briefly described in the paper, too.
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Solid-Lattice Stem Optimization Design for Hip Implants
39-46Views:428The goal of this study is analyzed and design a methodology to reduce stem mass, through topology and lattice optimization of a Ti-6Al-4V hip implant, meeting yield stress requirements. Four optimization cases were studied: Topology optimization (1), Lattice design 100% (2), Lattice design 50% (3), Lattice design 25% (4). Five load cases from a study were applied for each optimization cases: Combined (LC1), standing-up (LC2), standing (LC3), going up stairs (LC4), jogging (LC5). The optimized cases design reduced stem mass approximately by 30% (1), 5% (2) ,8% (3) and 2% (4), compared with the total stem hip Ti-6Al-4V implant.
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Evaluation of a Trainee Program’s Selection and Induction
502-511Views:603The research based on the trainee program of a large Hungarian company. The company recommends the program to entrants or those who have 1-1,5 years of work experience. The main objective is the evaluation of the effectiveness of the program through some of the HR functions. This study contains the process of the selection and the evaluation of getting into the program. What makes the program special, is the appearance of the technical mentor. According to the hypothesis, the mentor’s assistance reduces the uncertainty when the trainee inducted into the organization. The occasions of the beginner education, the conversations and feedbacks during the induction adds more efficiency to the success of the program. The searched data in literature features HR functions and mentoring. To learn about the program, a case study was made beforehand, and then the questionnaire was edited for the trainees at the company. In the course of the research, an interview was done with the technical mentor. The interview was based on the questionnaire. In point of the results, recommendations were defined connected to the assumed shortages of the program, also to increase the efficiency of the selection and induction. In conclusion, the maintenance of the trainee program is equally beneficial for the trainees and for the company as well.
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Strategic Role of HR in Hungary and Slovakia, Based on the International Cranet Research (2015-2016)
478-489Views:328Western-European management trends have been spread including modern approaches to human resource management over the past decades in the countries of Central and Eastern Europe. The point of the new HR conception is the strategic partner role, which is underpinned by the appreciation of human resources. There was a rapid change in the management methods of the organizations due to the socio-economic changes in the examined countries. However, in many places the personnel departments were simply renamed, and their HR staff are still concentrating on their traditional activities. These activities are important and should be fulfilled today as well, but to play an influential role in the design and maintenance of organizational competitiveness HR should have a new, strategic attitude. The study examines HR's strategic role based on the empirical international Cranet research in Hungary and in Slovakia.
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Analysis of Thermal Degradation in the Annealing Process of Colored Parts Built by Extrusion-Based 3D Printing
124-133Views:393With the ever-increasing request of light materials, poly lactic (acid) PLA, have got much in consideration. Low-cost PLA materials have risen its use. Those possess some benefits but nevertheless insufficient mechanical strength. The printed PLA objects have a stumbling block for practical applications. Thus, annealing is an interested alternative to make 3D printed objects strong. This thermal treatment can significantly develop investigational studies and offer technical data. Hence the purpose of this paper is study and discuss how to increase the flexural strength through annealing process. Geometry distortions and color degradation will be analyzed. Differential Scanning Calorimetry, Taguchi Method (TM) and variance (ANOVA) were applied as part of the design experiments and analysis. Twenty-seven printed specimens were tested and factors as temperature, time and color were selected.
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The Role Of Leader In Work Addiction
1-13.Views:0Over-attachment to work is an increasingly common phenomenon in the lives of people in organisations, and can also be a condition of work addiction. Whoever becomes involved in an organisation, be it a subordinate or even a manager, work addiction has a number of negative consequences at both individual and organisational level. Without being exhaustive, work addiction can have an impact on organisational performance, organisational effectiveness, workplace conflict, career prospects, health maintenance. In this paper, we aim to highlight the most relevant publications from the last five years to report on the impact in an organisation when work addiction arises among subordinates or managers, and how different leadership styles are associated with work addiction among organisational members. The publications were retrieved from Google Scholar and Scopus, and the results of 19 articles are presented in this paper after a review of 263 papers retrieved. The results show that transformational, servant and ethical leadership styles have ambiguous effects on work addiction, unlike laissez-faire or abusive leadership styles, the former enhancing and the latter reducing the incidence of work addiction in an organisation. Work addiction of managers also has a dual effect: on the one hand, it can enhance creativity, but it can also increase turnover among subordinates. Social support from the manager can be an antidote to subordinates' work addiction, but this effect may be modified by the quantity and quality of interaction between manager and subordinate, the sense of meaningfulness of the work, or even the organisational culture. Overall, the manager, as a key actor, can have an impact on work addiction in the organisation, but there is not always a consistent position in the research on the cases and the way in which this is done, which calls for further research in the future.
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Qualitative and Quantitative Analysis of Optical Industry Produced Grey Water, Proposal For Treatment Technology
84-88Views:95Our 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.
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Optimization of Automotive Industry’s Manufacturing Process with Lean Tools
81-89Views:394Lean plays i mportant role in industrial environment. Automotive industries use lean tools in order to reduce cost and i mprove productivity. To achieve the company's objectives and so lve the detected problems I also used lean tools. By using lean tools we want to decrease total process cost (TPC). In order to achieve this target, the three-shift production has to reduce in two-shift production, which result decrease in the human resource costs and production costs. In order to reduce shifts we have to increase overall equipment efficiency (OEE) and eliminate minimum 50% of wastes by implementing 5s methodology, using Poka-yoke and scheduled maintenance.
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Analysis of the Situation and Structure of Passenger Transport in Hungary
195-208Views:140Traffic and transportation are important segments, as they contribute to the economy's functioning, to mobility, trade and job creation. Transport per capita spending in recent years exceeded 10% of the total spending of the population. In the first part of my article, I review the characteristics and importance of passenger transport. In the subsequent chapters, I will show how significant are the trends and differences that can be discovered when analysing population spending on transport, car purchases and maintenance and passenger transport by age group and educational attainment.
