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匹配条件: “Zoltán Gy?rgy” ,找到相关结果约197905条。
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Checklist of the Bulgarian Bruchinae (Coleoptera: Chrysomelidae)
ANELIA STOJANOVA,ZOLTáN GYRGY
ZooNotes , 2011,
Abstract: Checklist of Bulgarian Bruchinae (Coleoptera: Chrysomelidae) based on published data till 2011 is presented. Eighty-five species belonging to nine genera are listed.
Using Artificial Neural Networks for ECG Signals Denoising
Zoltán Germán-Salló,Katalin Gyrgy
Scientific Bulletin of the ''Petru Maior" University of T?rgu Mure? , 2010,
Abstract: The authors have investigated some potential applications of artificial neural networks in electrocardiografic (ECG) signal prediction. For this, the authors used an adaptive multilayer perceptron structure to predict the signal. The proposed procedure uses an artificial neural network based learning structure to estimate the (n+1)th sample from n previous samples To train and adjust the network weights, the backpropagation (BP) algorithm was used. In this paper, prediction of ECG signals (as time series) using multi-layer feedforward neural networks will be described. The results are evaluated through approximation error which is defined as the difference between the predicted and the original signal.The prediction procedure is carried out (simulated) in MATLAB environment, using signals from MIT-BIH arrhythmia database. Preliminary results are encouraging enough to extend the proposed method for other types of data signals.
A New Seed Beetle Species to the Bulgarian Fauna: Bruchidius siliquastri, Delobel (Coleoptera: Chrysomelidae: Bruchinae)
Anelia M. Stojanova,Zoltán Gyrgy,Zoltán László
Ecologia Balkanica , 2011,
Abstract: A seed beetle Bruchidius siliquastri DELOBEL, 2007 (Coleoptera: Chrysomelidae) was reared from ripe pods of Cercis siliquastrum (Fabaceae) in Bulgaria and this is the first record of the species to the Bulgarian fauna. New host plants of the bruchid species were established on the basis of material collected in Hungary: Cercis occidentalis, Cercis chinensis and Cercis griffithii. A rich hymenopteran complex associated with the seed beetle was reared and comments on it are presented.
Temperature and pressure-induced spin-state transitions in LaCoO3
Gyrgy Vankó,Jean-Pascal Rueff,Aleksi Mattila,Zoltán Németh,Abhay Shukla
Physics , 2005, DOI: 10.1103/PhysRevB.73.024424
Abstract: We report the continuous variation of the spin moment of cobalt in LaCoO3 across its temperature and pressure-induced spin transitions evidenced with K\beta emission spectra. The first thermal transition is best described by a transition to an orbitally nondegenerate intermediate spin (S=1) state. In parallel, continuous redistribution of the 3d electrons is also indicated by partial fluorescence yield X-ray absorption spectra. At high pressure, our study confirms that the material becomes low spin between 40 and 70 kbar at room temperature.
HYDRODEAROMATIZATION OF GAS OIL FRACTIONS ON Pt-Pd/USY CATALYST
Gábor Nagy,Jen? Hancsók,Zoltán Varga,Gyrgy P?lczmann
Petroleum and Coal , 2007,
Abstract: Beside the reduction of sulphur content in diesel fuels, aromatics reduction is also relevant, because it contributes to the increase of cetane number and to be abatement of exhaust gas emissions, mainly hydrocarbons (HC) and particulate matter (PM). The aim of present study was to identify and quantify the key process parameters for hydrodearomatization of prehydrogenated gas oil fractions on Pt-Pd/USY zeolite catalysts. The effect of key process parameters (temperature, pressure, LHSV, H2-to-hydrocarbon ratio) on the yield and quality of products was investigated. Additionally, the effect of the reduction of aromatic content on the main properties of gas oils (density, refractive index, cetane number etc.) was also studied.
NIRS PREDICTION FOR PROTEIN AND INTRAMUSCULAR FAT CONTENT OF RABBIT HIND LEG MEAT
Gyrgy Bázár,Zoltán Princz,Gabriella Jekke,László Locsmándi
Poljoprivreda (Osijek) , 2007,
Abstract: The goal of this study was to develop calibration equations to predict the chemical composition of raw,homogenized rabbit meat by means of near infrared spectroscopy (NIRS). 44 Pannon White rabbits were housedin groups in three different pen types (16 anim./m2), and were fed the same diet. Another 45 animals were housedin cages (12 anim./m2) and fed by different feeding regimes. Rabbits were slaughtered at the bodyweight of 2.4-2.5kg. Homogenized fresh and freeze-dried left total hind leg muscles were investigated by NIRS using a NIRSystem 6500 equipment with small ring cup sample holder. The ether extract and protein content of all samples were determined chemically. Samples 44 of housing experiment were applied in producing LOCAL calibration equations tested on the 45 samples from the separate feeding experiment. Coefficients of determination (R2) of the predictions were 0.89 and 0.99 for fat, 0.85 and 0.96 for protein in fresh and freeze-dried samples, respectively. Results are reassuring, because the equations were applicable, however the analyzed samples were from independent housing and feeding systems. Therefore the chemical compositions differed in the two datasets, i.e. 9.46%, and 11.79% for fat, 85.75% and 83.44% for protein content in calibration and prediction datasets, respectively. The average of NIRS predicted values for fat and protein was 11.36%, 83.88% or 11.54%, 83.45%when using fresh or freeze-dried samples, respectively.
Quasi-Model-Based Control of Type 1 Diabetes Mellitus
András Gy rgy,Levente Kovács,Péter Szalay,Dániel A. Drexler,Balázs Benyó,Zoltán Benyó
Journal of Electrical and Computer Engineering , 2011, DOI: 10.1155/2011/728540
Abstract: Glucose-insulin models appeared in the literature are varying in complexity. Hence, their use in control theory is not trivial. The paper presents an optimal controller design framework to investigate the type 1 diabetes from control theory point of view. Starting from a recently published glucose-insulin model a Quasi Model with favorable control properties is developed minimizing the physiological states to be taken into account. The purpose of the Quasi Model is not to model the glucose-glucagon-insulin interaction precisely, but only to grasp the characteristic behavior such that the designed controller can successfully regulate the unbalanced system. Different optimal control strategies (pole-placement, LQ, Minimax control) are designed on the Quasi Model, and the obtained controllers' applicability is investigated on two more sophisticated type 1 diabetic models using two absorption scenarios. The developed framework could help researchers engaging the control problem of diabetes.
Identification of Protein Kinase Inhibitors with a Selective Negative Effect on the Viability of Epstein-Barr Virus Infected B Cell Lines
Vassilis Mavromatidis, Zoltan Varga, Frigyes Waczek, Zoltán ?rfi, László ?rfi, Gyrgy Kéri, George Mosialos
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0095688
Abstract: Epstein-Barr virus (EBV) is a human herpesvirus, which is causally associated with the development of several B lymphocytic malignancies that include Burkitt's lymphomas, Hodgkin's disease, AIDS and posttransplant associated lymphomas. The transforming activity of EBV is orchestrated by several latent viral proteins that mimic and modulate cellular growth promoting and antiapoptotic signaling pathways, which involve among others the activity of protein kinases. In an effort to identify small molecule inhibitors of the growth of EBV-transformed B lymphocytes a library of 254 kinase inhibitors was screened. This effort identified two tyrosine kinase inhibitors and two MEK inhibitors that compromised preferentially the viability of EBV-infected human B lymphocytes. Our findings highlight the possible dependence of EBV-infected B lymphocytes on specific kinase-regulated pathways underlining the potential for the development of small molecule-based therapeutics that could target selectively EBV-associated human B lymphocyte malignancies.
On the microscopic origin of the magneto-electronic phase separation in Sr doped LaCoO3
Zoltán Németh,András Szabó,Karel Knizek,Marcin Sikora,Roman Chernikov,Norbert Sas,Csilla Bogdán,Dénes Lajos Nagy,Gyrgy Vankó
Physics , 2013,
Abstract: The nanoscopic magneto-electronic phase separation in doped La1-xSrxCoO3 perovskites was studied with local probes. The phase separation is directly observed by M\"ossbauer spectroscopy in the studied doping range of 0.05 <= x <= 0.25 both at room-temperature as well as in the low temperature magnetic phase. Extended with current synchrotron based X-ray spectroscopies, these data help to characterize the volume as well as the local electric and magnetic properties of the distinct phases. A simple model based on a random distribution of the doping Sr ions describes well both the evolution of the separated phases as well as the variation of the Co spin state. The experiments suggest that Sr doping initiates small droplets and a high degree of doping driven cobalt spin-state transition, while the Sr-free second phase vanishes rapidly with increasing Sr content.
Effect of Antimicrobial Peptide-Amide: Indolicidin on Biological Membranes
Attila Gergely Végh,Krisztina Nagy,Zoltán Bálint,ádám Kerényi,Gábor Rákhely,Gy rgy Váró,Zsolt Szegletes
Journal of Biomedicine and Biotechnology , 2011, DOI: 10.1155/2011/670589
Abstract: Indolicidin, a cationic antimicrobial tridecapeptide amide, is rich in proline and tryptophan residues. Its biological activity is intensively studied, but the details how indolicidin interacts with membranes are not fully understood yet. We report here an in situ atomic force microscopic study describing the effect of indolicidin on an artificial supported planar bilayer membrane of dipalmitoyl phosphatidylcholine (DPPC) and on purple membrane of Halobacterium salinarum. Concentration dependent interaction of the peptide and membranes was found in case of DPPC resulting the destruction of the membrane. Purple membrane was much more resistant against indolicidin, probably due to its high protein content. Indolicidin preferred the border of membrane disks, where the lipids are more accessible. These data suggest that the atomic force microscope is a powerful tool in the study of indolicidin-membrane interaction.
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