... small and medium size UAVs 1 developed at Óbuda Universtiy for research purposes.The aim of the ...
Tópico(s): Control and Dynamics of Mobile Robots
2014 - Óbuda University | Acta Polytechnica Hungarica
Okore Oghale O’woma, Ubiaru Prince. Chigozirim., Nwaogwugwu Uzoamaka Gloria,
... co-infection was carried out among residents of Obuda-Aba, Abia State, Nigeria, between July and September, ... health education campaign to educate the residents of Obuda-Aba to correct the wrong perception they have ...
Tópico(s): Hepatitis Viruses Studies and Epidemiology
2015 - | American journal of public health research
... Doctoral School of Applied Informatics and Applied Mathematics, Óbuda University.The laboratory system consists of research eligible ...
Tópico(s): Flexible and Reconfigurable Manufacturing Systems
2019 - Óbuda University | Acta Polytechnica Hungarica
Ákos Nemcsics, Miklós Schuszter, László Dobos, P. Turmezei,
Surface morphology of GaAs (001) surface after electrochemical layer removal with the help of image processing was investigated. The surface pattern of GaAs shown fractal behaviour under non-selective etching conditions. The morphological surface study was carried out using digital image processing of scanning electron microscope data. The surface patterns were segmented by the so called grade of membership method. Fractal behaviour of the surface morphology was established using the box counting ...
Tópico(s): Surface Roughness and Optical Measurements
2009 - Óbuda University | Acta Polytechnica Hungarica
Walter Ruda, Thomas Martin, Benjamin Danko,
The reserach project Foundation and Entrepreneurship of Students (GESt- study) analyzes entrepreneurial criteria and existing cause-effect relationships within the pre-start-up process of students, in order to generate recommended actions for advcancing and improving the design of student entrepreneurship support and entrepreneurship education. This benefits the entrepreneurial activity of the most innovative target group of students and academics and, thus, employment and the competetiveness of ...
Tópico(s): Higher Education and Employability
2009 - Óbuda University | Acta Polytechnica Hungarica
József K. Tar, J.F. Bitó, László Nádai, J. A. Tenreiro Machado,
A further step towards a novel approach to adaptive nonlinear control developed at Budapest Tech in the past few years is reported. This approach obviates the use of the complicated Lyapunov function technique that normally provides global stability of convergence at the costs of both formal and essential restrictions, by applying Cauchy sequences of local, bounded basin of attraction in an iterative control that is free of such restrictions. Its main point is the creation of a robust iterative ...
Tópico(s): Adaptive Control of Nonlinear Systems
2009 - Óbuda University | Acta Polytechnica Hungarica
Péter Várlaki, László Nádai, J. Bokor,
In this paper we analyze in detail the central role of number ‘137’, the so-called Fine Structure Constant in the collaboration of Pauli and Jung. First, we present the fascination or the obsession of Pauli for the interpretation of number ‘137’. Second, we treat the spontaneous messages originating from unconscious concerning number ‘137’ in the wellknown dreams of Pauli. We restrict our investigations to the dreams containing the especially important formulae of Fine Structure Constant (4π + π + π), and ...
Tópico(s): Advanced Mathematical Theories and Applications
2008 - Óbuda University | Acta Polytechnica Hungarica
Babak Daneshvar Rouyendegh, Serpil Erol,
Proposed in this study is a hybrid model for supporting the department selection process within Iran Amirkabir University. This research is a two-stage model designed to fully rank the organizational departments where each department has multiple inputs and outputs. First, the department evaluation problem is formulated by Data Envelopment Analysis (DEA) and separately formulates each pair of units. In the second stage, the pair- wise evaluation matrix generated in the first stage is utilized to ...
Tópico(s): Customer Service Quality and Loyalty
2010 - Óbuda University | Acta Polytechnica Hungarica
A. Azadeh, Morteza Saberi, Vahid Nadimi, Mino Iman, Alireza Behrooznia,
This paper presents an adaptive-network-based fuzzy inference system (ANFIS) for long-term natural Electric consumption prediction. Six models are proposed to forecast annual Electric demand. 104 ANFIS have been constructed and tested in order to find the best ANFIS for Electric consumption. Two parameters have been considered in the construction and examination of plausible ANFIS models. The type of membership function and the number of linguistic variables are two mentioned parameters. Six different ...
Tópico(s): Solar Radiation and Photovoltaics
2010 - Óbuda University | Acta Polytechnica Hungarica
Péter Várlaki, Imre J. Rudas, L.T. Kóczy,
This paper deals with the historical origin of the primordial image of the fine structure constant (FSC) and the number 137 as the Self’s own number archetype, which plays a central role in the poetic-hermeneutic system of the Holy Crown of Hungary. We intend to show that the allegorical and symbolical images which are observed as the manifestation of unconscious and interpreted and analyzed in the Pauli-Jung collaboration have a lengthy synchronistic relationship with the “archetypal model” of the ...
Tópico(s): Ancient Egypt and Archaeology
2010 - Óbuda University | Acta Polytechnica Hungarica
András Róka, Ádám Csapó, Barna Reskó, Péter Bárányi,
Traditional edge-detection algorithms in image processing typically convolute a filter operator and the input image, and then map overlapping input image regions to output signals. Convolution also serves as a basis in biologically inspired (Sobel, Laplace, Canny) algorithms. Recent results in cognitive retinal research have shown that ganglion cell receptive fields cover the mammalian retina in a mosaic arrangement, with insignificant amounts of overlap in the central fovea. This means that the ...
Tópico(s): Neural dynamics and brain function
2007 - Óbuda University | Acta Polytechnica Hungarica
Zsuzsa Preitl, Pavol Bauer, J. Bokor,
In this paper a hybrid electric vehicle is considered, which contains both an internal combustion engine and an electric motor (EM). Without focusing on the other components of the vehicle, the EM is treated in detail, both regarding modelling aspects and control solutions. After a brief modelling of the plant, two cascade speed control solutions are presented: first a classical PI+PI cascade control solution is presented. The control systems related to traction electric motors (used in vehicle traction) ...
Tópico(s): Electric and Hybrid Vehicle Technologies
2007 - Óbuda University | Acta Polytechnica Hungarica
Marius L. Tomescu, Ștefan Preitl, Radu‐Emil Precup, József K. Tar,
This paper presents a new stability analysis method for nonlinear processes with Takagi-Sugeno (T-S) fuzzy logic controllers (FLCs). The design of the FLCs is based on heuristic fuzzy rules. The stability analysis of these fuzzy control systems is performed using LaSalle's invariant set principle with non-quadratic Lyapunov candidate function. This paper proves that if the derivative of Lyapunov function is negative semi-definite in the active region of each fuzzy rule, then the overall system will ...
Tópico(s): Stability and Control of Uncertain Systems
2007 - Óbuda University | Acta Polytechnica Hungarica
This paper is concerned with the evaluation of effects of modeled object changes at development of product in virtual space. Modeling of engineering objects such as elements and structures of products, results of analyses and tests, processes for production, and customer services has reached the level where sophisticated descriptions and modeling procedures serve lifecycle management of product information (PLM). However, effective utilization of highly associative product models is impossible in ...
Tópico(s): Product Development and Customization
2007 - Óbuda University | Acta Polytechnica Hungarica
Zsuzsa Preitl, Radu‐Emil Precup, József K. Tar, Márta Takács,
The paper presents some main aspects regarding multi-parametric quadratic programming (mp-QP) problems. Model Predictive Control (MPC) is considered as a particular mp-QP problem, and this powerful tool is applied for control and simulation through a case study. Since the solutions to mp-QP problems can be expressed as piecewise affine linear functions of the state, a new implementation in terms of adaptive network- based fuzzy inference systems is proposed. The presentation is focused on the double ...
Tópico(s): Iterative Learning Control Systems
2006 - Óbuda University | Acta Polytechnica Hungarica
Fetah Kolonić, Alen Poljugan, Ivan Petrović,
The Tensor Product (TP) model transformation is a recently proposed technique for transforming given Linear Parameter Varying (LPV) state-space models into polytopic model form, namely, to parameter varying convex combination of Linear Time Invariant (LTI) systems. The main advantage of the TP model transformation is that it is executable in a few minutes and the Linear Matrix Inequality (LMI)-based control design frameworks can immediately be applied to the resulting polytopc models to yield controllers ...
Tópico(s): Advanced NMR Techniques and Applications
2006 - Óbuda University | Acta Polytechnica Hungarica
Motion control has been a fruitful ground for applying Variable Structure Systems (VSS) theory. This paper provides an assessment of the state of the art of the relevant theoretical results for sliding mode control. The design of a sliding-mode controller consists of three main steps. First step is the design of the sliding surface, the second step is the design the control law which holds the system trajectory on the sliding surface, and the third and key step is the chattering-free implementation. ...
Tópico(s): Vehicle Dynamics and Control Systems
2006 - Óbuda University | Acta Polytechnica Hungarica
Dávid Vincze, Szilveszter Kovács, Márta Gácsi, Péter Köröndi, Ádám Miklósi, Péter Bárányi,
The concept of 'Future Internet', 'Internet of Things' and '3D Internet' opens a novel way for modeling ethological tests by rebuilding models of human-animal interaction in an augmented environment as an interactive mixture of virtual actors and real human observers. On the one hand these experiments can serve as a proof of concept, as a kind of experimental validation of formal ethological models, but on the other hand they can also serve as examples for the ways a human can communicate with things ( ...
Tópico(s): Cephalopods and Marine Biology
2012 - Óbuda University | Acta Polytechnica Hungarica
Gusztáv Fekete, Patrick De Baets, Magd Abdel Wahab, Béla Csizmadia, Gábor Katona, Libardo Vicente Vanegas Useche, José Alfredo Solanilla,
The sliding-rolling ratio between the femoral and tibial condyles throughout the active functional arc of the knee (20-120 degrees of flexion angle) is currently unknown. Since wear is the most determining lifetime factor of the current total knee replacements, the presence of sliding-rolling cannot be neglected. The reason lies in the fact that this phenomenon causes different material abrasion compared to pure sliding or rolling alone. Only a limited amount of studies have dealt with this question ...
Tópico(s): Tribology and Wear Analysis
2012 - Óbuda University | Acta Polytechnica Hungarica
Xin Chen, N. Noda, Magd Abdel Wahab, Yu-Ichiro Akaishi, Yoshikazu Sano, Yasushi TAKASE, Gusztáv Fekete,
In this paper, fatigue failure is considered, for bolt-nut connections, when a slight pitch difference is introduced between the bolt and the nut. To improve the fatigue life, three types of pitch difference are produced on the specimens and the experimental results are compared and discussed in terms of FEM analysis. Considering the standard bolt-nut connection of alpha=0 mu m, the bolt fracture does not happen at the No. 1 thread by introducing a slight pitch difference of alpha=5 mu m and alpha= ...
Tópico(s): Mechanical Engineering and Vibrations Research
2015 - Óbuda University | Acta Polytechnica Hungarica
Balázs Dániel, Péter Köröndi, Gábor Sziebig, Trygve Thomessen,
A new approach for industrial robot user interfaces is necessary due to the fact that small and medium sized enterprises are more interested in automation.The increasing number of robot applications in small volume production requires new techniques to ease the use of these sophisticated systems.In this paper shop floor operation is in the focus.A Flexible Graphical User Interface is presented which is based on cognitive infocommunication (CogInfoCom) and implements the Service Oriented Robot Operation ...
Tópico(s): Context-Aware Activity Recognition Systems
2014 - Óbuda University | Acta Polytechnica Hungarica
Seyedmajid Mousavi, Amir Mosavi, Annamria R. Várkonyi-Kóczy, Gábor Fazekas,
Utilizing dynamic resource allocation for load balancing is considered as an important optimization process in cloud computing.In order to achieve maximum resource efficiency and scalability in a speedy manner this process is concerned with multiple objectives for an effective distribution of loads among virtual machines.In this realm, exploring new algorithms, as well as development of novel algorithms, is highly desired for technological advancement and continued progress in resource allocation ...
Tópico(s): Brain Tumor Detection and Classification
2017 - Óbuda University | Acta Polytechnica Hungarica
Anna Dunay, József Lehota, Éva Csíkné Mácsai, Csaba Bálint Illés,
The research discusses the objectives, goals and attitudes of Hungarian fruit and vegetable producers using the method of Theory of Planned Behaviour.The objective of the paper is to explore the factors which may influence the decision-making process of agricultural producers in choosing the appropriate marketing channel.Research results showed that main goals of producers using direct sales are focused on economic issues, but non-economic goals (tradition, consumer relations, local values, environmental ...
Tópico(s): Quality and Supply Management
2018 - Óbuda University | Acta Polytechnica Hungarica
Thameur Obeidi, Chérif Larbès, Adrian Ilinca, Gul Filiz Tchoketch Kebir,
A maximum power point tracking (MPPT) system, for a very high-efficiency photovoltaic array applied to a solar-powered vehicle, was studied in this work.Photovoltaic energy is a promising alternative energy; however, its high initial cost, it is essential to improve the energy conversion efficiency.Regarding a particular incident solar insolation and temperature, there is a specific voltage at which maximum power may be harvested (Maximum power point, MPP).The Maximum Power Point is therefore achieved ...
Tópico(s): Photovoltaic System Optimization Techniques
2018 - Óbuda University | Acta Polytechnica Hungarica
Katarzyna Chmielewska, Attila Gilányi,
Mathability in its definition refers to cognitive infocommunication and combines machine and human cognitive capabilities essential for mathematics.In the paper educational aspects of the notion are considered.A new proposal of learning outcomes taxonomy is presented.
Tópico(s): Cognitive and developmental aspects of mathematical skills
2018 - Óbuda University | Acta Polytechnica Hungarica
Tópico(s): Hungarian Social, Economic and Educational Studies
2019 - Óbuda University | Acta Polytechnica Hungarica