In this paper, we investigate the characteristics of an object’s vibration in identifying its material of construction. A simple vibration test is performed to classify different types of materials. The test is done by performing small hammer excitation on the object then recording its vibration using one acceleration sensor. Four different materials were tested (steel, hardwood, softwood, and plastic). The vibration signal was analyzed using MATLAB based model. The trained model was able to recognize the testing samples of each material. The advantages of this method are that it is accurate, fast and simple, can be performed on-site and is relatively inexpensive.
László Péter Pusztai, Balázs Kocsi, István Budai and Lajos Nagy
It is essential for every company to know their business processes well, because these companies must allocate their resources in an efficient way in order to keep or strengthen their market position. During the research we aimed at optimizing the material flow at a wooden box producer company with the use of the generalized network flow model as this model is widely used for modelling production processes. In the first part of our work we calculated the optimal material flows focusing on two objectives, and in the second part we determined a compromise solution. Finally, we compared and evaluated the results of the three models.
Bence Márk Szeszák, György Juhász, Gusztáv Áron Sziki, Rita Nagyné Kondor, Tamás Sádor Sütő and Krisztián József Veszelszki
In this publication we present a vehicle dynamic model and the motion of equation for pneumobiles. One of the input parameters of the model is the rolling resistance coefficient of the tyres. The present publication describes the experimental setup and work in the course of which the above coefficient was measured and the effect of tyre pressure on rolling resistance was analysed. During the measurement, we examined the effect of tyre pressure on rolling resistance, including when the vehicle in unloaded and in loaded state.
Lajos György Kopenetz and Ferdinánd-Zsongor Gobesz
In case of old metal constructions, where the loadbearing structure dominates, material issues have a great influence on the behaviour of the construction both in terms of function and safety. Old metal constructions generally have a monumental nature, so preservation, restoration and rehabilitation works are inseparable from material issues. Due to this monumental nature, research into the material generally allows only minor damage, therefore these investigations require the use of special methods.
The wide spread of IoT devices makes possible the collection of enormous amounts of sensor data. Traditional SQL (structured query language) database management systems are not the most appropriate for storing this type of data. For this task, distributed database management systems are the most adequate. Apache Cassandra is an open source, distributed database server software that stores large amounts of data on low-coast servers, providing high availability. The Cassandra uses the gossip protocol to exchange information between the distributed servers. The query language used is the CQL (Cassandra Query Language).
In this paper we present an alternative solution to traditional SQL-based database management systems - the so called NoSQL type database management systems, summarize the main types of these systems and provide a detailed description of the Apache Cassandra open source distributed database server installation, configuration and operation.
During patient monitoring, personalization is extremely important in order to achieve realistic results when determining the risk level based on the measurement of physiological characteristics. This requirement can be met by a system where neither the inputs nor their number are fixed but can be defined in a personalized way. In this article, that kind of flexible framework system is presented, with particular reference to its input factors and their measurement possibilities.
Today, the state, its organizations and its citizens have become vulnerable to the complexity of complex electronic information systems in the cyberspace of Hungary, without which state operations and the provision and use of different services become unworkable. In addition to the modern economic system, society is not prepared to operate without lost infrastructure, assets or services, so they must clearly be protected especially because the information used and generated in their operation and the data managed represent significant assets.
Attila Szántó, Gusztáv Áron Szíki, Sándor Hajdu, András Gábora and Kristóf Balázs Sipos
In the following the role and contribution of vehicle dynamics simulation to the development of race cars at the Faculty of Engineering of the University of Debrecen is presented. The application of the developed simulation program for the optimization of the car’s technical data, together with the principle and method of optimization, is also described here.
Kinga Éva Paczolai, Balázs Kósa and Renáta Németh-Szigeti
The World Heritage Square at Pécs is to be constructed in the framework of a program dedicated to developing the locations of the World Heritage. The aim is to rehabilitate the squares belonging to the World Heritage in the hope of increasing the attendance on a conceptual thinking. The study focuses on the marked areas with the purpose of connecting the Castle Wall and its walkway. The rehabilitation even extends to redesign the area in front of the Old Christian Mausoleum.
The proportion of renewable energy sources must be increased to reduce the energy dependence and energy cost of municipalities, to increase energy security and to consider aspects of the environment. The purpose of this research is to determine how and to what extent small-size household power plants (SSHPP) – which belong to the category of smallest-scale power plants –can contribute to providing the electricity supply with regard to all the Hungarian settlements.