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Non-Linear EEG Measures in Meditation

Journal of Biomedical Science and Engineering 2014年第9期7卷 731-738页

作者： oldrich vysata Martin Schatz Jakub Kopal Jan Burian Ales Procházka Kuchynka Jiri Jakub Hort Martin Valis Department of Computing and Control Engineering Institute of Chemical TechnologyPragueCzech Republic Department of Neurology Faculty of Medicine in Hradec KraloveCharles UniversityHradec KraloveCzech Republic Faculty of Informatics and Statistics University of Economics PraguePragueCzech Republic Memory Disorders Clinic Department of NeurologyCharles University in Prague2nd Faculty of Medicine and University Hospital MotolPragueCzech Republic International Clinical Research Center St.Anne’s University Hospital BrnoBrnoCzech Republic

In this study, the performance of Sevcik’s algorithm that calculates the fractal dimension and permutation entropy as discriminants to detect calming and insight meditation in electroencephalo-graphic (EEG) signals was assessed. The proposed methods were applied to EEG recordings from meditators practicing insight meditation and calming meditation before as well as during both types of meditation. Analysis was conducted using statistical hypothesis testing to determine the validity of the proposed meditation-identifying techniques. For both types of meditation, there was a statistically significant reduction in the permutation entropy. This result can be explained by the increased EEG synchronization, which is repeatedly observed in the course of meditation. In contrast, the fractal dimension (FD) was significantly increased during calming meditation, but during insight meditation, no statistically significant change was detected. Increased FD during meditation can be interpreted as an increase in self-similarity of EEG signals during self-organisation of hierarchical structure oscillators in the brain. Our results indicate that fractal dimension and permutation entropy could be used as parameters to detect both types of meditation. The permutation entropy is advantageous compared with the fractal dimension because it does not require a stationary signal.

关键词： Permutation Entropy Fractal Dimension EEG Calming Meditation Insight Meditation

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The effect of neodymium substitution on the structural and magnetic properties of nickel ferrite

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Progress in Natural Science:Materials International 2015年第3期25卷 215-221页

作者： ?srafil ?abiko?lu Levent Paral? Ondrej Malina Petr Novak Josef Kaslik Jiri Tucek Jiri Pechousek Jakub Navarik oldrich Schneeweiss Celal Bayar University Faculty of Arts&SciencesDepartment of Physics 45140 Muradiye Celal Bayar University Department of Electronics and Automation Regional Centre of Advanced Technologies and Materials Department of Experimental Physics and Physical ChemistryFaculty of SciencePalacky University Institute of Physics of Materials of the Academy of Sciences of the Czech Republic

Nickel ferrite Ni Fe2O4 is a typical soft magnetic ferrite with high electrical resistivity used as high frequency magnetic material. Neodymium(Nd3+) doped Ni Fe2O4 materials were fabricated using solid state reaction. The properties of the obtained material were investigated by X-Ray Diffraction(XRD), Scanning Electron Microscope(SEM), Fourier-Transform Infrared Spectroscopy(FT-IR), magnetic measurements on SQUID and M?ssbauer spectroscopy. It was found that the material consists of two different phases: Nd3+doped Ni Fet2O4and Nd Fe O3. The Nd3 ions occupy cation sites of the Ni Fe2O4 inverse spinel structure. NdFeO3 phase occurred when the level of Nd3+atoms exceed a percolation *** presence of both phases was confirmed by SEM observations. The M?ssbauer spectra analysis showed two sextets, which can be ascribed to iron atoms in tetrahedral and octahedral positions. From their intensities it is concluded that Nd3+occupies octahedral sites in the spinel structure of Ni Fe2O4, which were originally occupied by Ni2+.

关键词： NiFe2O4 Neodymium Solid-state reaction Magnetic properties M?ssbauer spectroscopy

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Influence of Trap Construction on Mosquito Capture

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Journal of Life Sciences 2012年第2期6卷 209-215页

作者： oldrich Sebesta Juraj Pegko Ivan Gelbi Department of Medical Zoology Institute of Vertebrate Biology Academy of Sciences of the Czech Republic （ASCR） Kvetna 8 Brno 60365 Czech Republic Regional Public Health Authority of South Moravian Region Jerabkova 4 Brno 60200 Czech Republic Biological Centre of ASCR Institute of Entomology Branigovsk6 31 Cesk6 Bud6jovice 3 7005 Czech Republic

During 2009 and 2010, 23 night-time mosquito captures were made at Kanci obora in south-eastern Moravia, Czech Republic. It was used in the Centers for Disease Control and Prevention （CDCP） miniature light traps with CO2 （dry ice） and baited lard-can traps in which sentinel animals were replaced with a container filled with CO2 （dry ice）. In the observed period, a total of 31,882 female mosquitoes were captured by CDC miniature light traps with CO2. Lard-can traps baited with CO2 captured 995 females under the same conditions, which is just 3.12% of the quantity from the CDC traps. At the same time, there were significant differences in the proportional captures of various species. Compared to CDC miniature light traps, baited lard-can traps much more often captured Aedes cinereus （16.58% of total versus 1.93% in CDC traps）, Culex modestus （15.48% versus 4.62%）, and Ae. rossicus （6.13% versus 2.67%）. On the other hand, capture of female Ae. vexans was proportionally much lower （15.38% versus 36.41%）. Capture of Cx. pipiens was more or less the same 14.77% （miniature light traps） and 15.76% （baited lard-can traps）. The occurrence of the calamity species Ae. sticticus was proportionally very high in both trap types （30.05% in lard-can traps baited with CO2, 33.58% in CDC miniature light traps）. The findings prove that a trap＇s design itself significantly affects not only the overall capture of mosquitoes but also the proportional representation of individual species.

关键词： CDC miniature light traps baited lard-can traps Aedes cinereus Aedes vexans Aedes sticticus Culex modestus Culexpipiens.

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Costs and Benefits of Smart Grids on Liberalized Markets

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Journal of Electronic Science and Technology 2012年第1期10卷 22-28页

作者： Marek Adamec Pavel Pavlatka oldrich Stary Department of Economics Management and HumanitiesCzech Technical University in PragueZikova 4166 29 Prague 6Czech Republic

The discussion about smart grid （SG） implementation is mostly focused on pilot projects. These projects are necessary for mapping of particular technical devices of advanced metering management （AMM） which is needed for successful SG and whole functional SG system operation. According to our opinion, for the next step of SG implementation, the participation of effective market design would be quite necessary. In other words, pilot project which is operated regardless to the market conditions and special SG tariff is incomplete and could be irrelevant for further evaluation of feasibility. With regard to above mentioned facts, the detailed cost-benefit-analysis （CBA） is needed to establish the correct methodology for evaluation of SG implementation effectiveness. Related aspects are mentioned and discussed in this paper, in which the particular cost and benefits as well as feedback that occurs as the reaction on implementation are summarized and quantified.

关键词： Advanced metering management,electricity market regulation smart grid system approach.

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Problems,assumptions and solutions in locomotive design,traction and operational studies

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Railway Engineering Science 2022年第3期30卷 265-288页

作者： Maksym Spiryagin Qing Wu oldrich Polach John Thorburn Wenhsi Chua Valentyn Spiryagin Sebastian Stichel Sundar Shrestha Esteban Bernal Sanjar Ahmad Colin Cole Tim McSweeney Centre for Railway Engineering Central Queensland UniversityRockhampton 4702Australia Independent Consultant Neuhausen am RheinfallSwitzerland Progress Rail NewcastleAustralia BHP Port HedlandAustralia Engineering Centre for Railway Transport SkolkovoRussian Federation KTH Royal Institute of Technology StockholmSweden

Locomotive design is a highly complex task that requires the use of systems engineering that depends upon knowledge from a range of disciplines and is strongly oriented on how to design and manage complex systems that operate under a wide range of different train operational conditions on various types of *** that field investigation programs for locomotive operational scenarios involve high costs and cause disruption of train operations on real railway networks and given recent developments in the rollingstock compliance standards in Australia and overseas that allow the assessment of some aspects of rail vehicle behaviour through computer simulations,a great number of multidisciplinary research studies have been performed and these can contribute to further improvement of a locomotive design technique by increasing the amount of computer-based *** paper was focused on the presentation of the all-important key components required for locomotive studies,starting from developing a realistic locomotive design model,its validation and further applications for train *** integration of all engineering disciplines is achieved by means of advanced simulation approaches that can incorporate existing AC and DC locomotive designs,hybrid locomotive designs,full locomotive traction system models,rail friction processes,the application of simplified and exact wheel-rail contact theories,wheel-rail wear and rolling contact fatigue,train dynamic behaviour and intrain forces,comprehensive track infrastructure details,and the use of co-simulation and parallel *** cosimulation and parallel computing approaches that have been implemented on Central Queensland University’s High-Performance Computing cluster for locomotive studies will be *** confidence in these approaches is based on specific validation procedures that include a locomotive model acceptance procedure and field test *** problems and limitations presented in locomot

关键词： Locomotive Design Simulation Virtual prototyping Digital twin Traction Braking Wheel-rail wear Damage

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Z-E Photo-lsomerisation of Styrene- and Stilbene-Derived Push-Pull Systems Bearing 4, 5-Dicyanoimidazole Unit

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材料科学与工程（中英文A版） 2011年第2X期1卷 146-151页

作者： Numan Almonasy Filip Bures Jiri Kulhainek oldrich Machalicky Institute of Organic Chemistry and Technology Faculty of Chemical Technology University of Pardubice Studentsk6 573Pardubice 532 10 Czech Republic

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WIWAXIA WALCOTT, 1911 AND DAILYATIA BISCHOFF, 1976 IN CAMBRIAN OF CZECH REPUBLIC

WIWAXIA WALCOTT, 1911 AND DAILYATIA BISCHOFF, 1976 IN CAMBRI...

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第二届国际古生物学大会

作者： Fatka oldrich Kraft PETR Szabad MICHAL Elicki OLAF Charles University Institute of Geology and Palaeontology Albertov 6 CZ-128 43 Prague 2 Czech Republic Obrancu miru 75 261 02 Pribram Ⅶ Czech Republic Freiberg University Geological Institute Bernhard von Cotta Street 209599 Freiberg Germany

The occurrence of two sclerite-bearing genera Wiwaxia Walcott, 1911 and Dailyatia Bischoff, 1976 has been recently established in the richly fossiliferous Cambrian sediments of the classical area of Barrandian.

关键词： Wiwaxia Dailyatia Barrandian area Cambrian

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