Laszlo Hanka

Óbudai Egyetem · Institut of mechatronics and vehicle engineering

The process of identification of radioactive isotopes using gamma ray spectrum produced by scintillation detectors is a fundamental problem in physics. Military applications also require fast and efficient methods, especially in field conditions, for identifying unknown isotopes. The fundamental problem is the relationship between the observed gamm...

The process of identification of radioactive isotopes using gamma ray spectrum produced by scintillation detectors is a fundamental problem in physics. Military applications also require fast and efficient methods, especially in field conditions, for identifying unknown isotopes. The fundamental problem is the relationship between the observed gamm...

In modern society the rights and the limitations became a crucial part of the everyday life. While more and more PIN code, password and RFID tag spreads out, the growth of the biometrical authentication is less pronounced. Certainly the background of this phenomenon is complex, but the efficiency and robustness are significant determinants. The mul...

The process of pattern recognition in the biometrics is particularly important. The patterns can differ from each other a lot, and even the samples can be significantly different from the templates. The Artificial Neural Networks can be applied as a universal approximator to recognize the patterns with more flexibility. However the topology of the...

The scaling of access control systems is usually done with respect to the life protection requirements regarding escape routes. At large headcount areas, the need for biometric identification arises from the security and business needs. Biometric systems can be characterized by probability variables, which can significantly affect the access proces...

One of the keystones of the smart city is the transportation. The railway is the crucial part in the main public- and also the goods-transportation today, and the significance will be constantly growing. Nowadays the increase in threats and decrease in the sense of security generates a high need for designing smart and multi-level integrated securi...

In this paper we presented a simplified solution of an artificial neural network which matches the patterns of fingerprints. As universal approximator, the artificial neural networks (ANNs) are able to bridge the non linear outcome of the superposition of elementary failures. We built up a multilayer feedforward network, and used the back-propagati...

In the modern society, the rights and the limitations became a crucial part of the everyday life. While more and more PIN code, password and RFID tag spreads, the growth of the biometrical authentication is less pronounced. Certainly, the background of this phenomenon is complex, but the efficiency and robustness are significant determinants. The m...

In this paper we presented a method which could be used in the testing process of biometric devices on the side of users and costumers. The failed events during the biometrical identification are more common than the literature data, however there isn't any standard or widely accepted manual for the examinations. The conventional statistical method...

The relationship between incident and observed gamma-ray spectrum can be described by a linear equation system. The solution of this system (called deconvolution), is generally a complex problem, because the solution is unstable with respect to the uncertainty of the measurement. The equation system is extremely sensitive to errors in the measured...