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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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Restoration of sea eagle population:A review

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Current Zoology 2009年第5期55卷 315-318页

作者： Josef RAJCHARD Jan prochzka University of South Bohemia Faculty of AgricultureDepartment of Biological Disciplines Agency for Nature Conservation and Landscape Protection of the Czech Republic Administration of the Koko ■ínsko Protected Landscape Area

The population density of the white-tailed sea eagle Haliaeetus albicilla is very low in many countries. In last twenty years, the sea eagle population in South Bohemia was restored by strict protection subsidized by reintroduction, The active help consisted of feeding during winter and building of artificial nests. A new sea eagle breeding population arose in the Treboǎ basin area in the early 1980＇ s. Until this time sea eagles had used former breeding places only for wintering, probably coming from the Baltic. The South Bohemian sea eagle population is very unique： it exists in a densely man-occupied landscape, mainly in areas with very intensive carp breeding in artificial fishponds and was partly artficially （help to wintering birds and reintroduction of some individuals） restored. The experience from South Bohemia may have importance for populations of the sea eagle in other areas of its occurence, primarily in the continental conditions [ Current Zoology 55 （5）： 315 - 318, 2009].

关键词： Sea eagle Haliaeetus albicilla

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Comparison of carotid endarterectomy and repeated carotid angioplasty and stenting for in-stent restenosis(CERCAS trial):a randomised study

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Stroke & Vascular Neurology 2023年第5期8卷 399-404页

作者： Tomáš Hrbáč Jiří Fiedler Václav procházka Tomáš Jonszta Martin Roubec David Pakizer Daniel Václavík David Netuka Tomáš Heryán David Školoudík Department of Neuroscience Faculty of MedicineUniverzity of OstravaOstravaCzech Republic Department of Neurosurgery University Hospital OstravaOstravaCzech Republic Department of Neurosurgery ČeskéBudějovice HospitalČeskéBudějoviceCzech Republic Department of Radiology University Hospital OstravaOstravaCzech Republic Department of Neurology University Hospital OstravaOstravaCzech Republic Center for Health Research Faculty of MedicineUniversity of OstravaOstravaCzech Republic Department of Neurology Vítkovice HospitalOstravaCzech Republic Department of Neurosurgery Military University Hospital PraguePrahaCzech Republic

Background and aim In-stent restenosis(ISR)belongs to an infrequent but potentially serious complication after carotid angioplasty and stenting in patients with severe carotid *** of these patients might be contraindicated to repeat percutaneous transluminal angioplasty with or without stenting(rePTA/S).The purpose of the study is to compare the safety and effectiveness of carotid endarterectomy with stent removal(CEASR)and rePTA/S in patients with carotid *** Consecutive patients with carotid ISR(≥80%)were randomly allocated to the CEASR or rePTA/S *** incidence of restenosis after intervention,stroke,transient ischaemic attack myocardial infarction and death 30 days and 1 year after intervention and restenosis 1 year after intervention between patients in CEASR and rePTA/S groups were statistically *** A total of 31 patients were included in the study;14 patients(9 males;mean age 66.3±6.6 years)were allocated to CEASR and 17 patients(10 males;mean age 68.8±5.6 years)to the rePTA/S *** implanted stent in carotid restenosis was successfully removed in all patients in the CEASR *** clinical vascular event was recorded periproceduraly,30 days and 1 year after intervention in both *** one patient in the CEASR group had asymptomatic occlusion of the intervened carotid artery within 30 days and one patient died in the rePTA/S group within 1 year after *** after intervention was significantly greater in the rePTA/S group(mean 20.9%)than in the CEASR group(mean 0%,p=0.04),but all stenoses were<50%.Incidence of 1-year restenosis that was≥70%did not differ between the rePTA/S and CEASR groups(4 vs 1 patient;p=0.233).Conclusion CEASR seems to be effective and save procedures for patients with carotid ISR and might be considered as a treatment option.

关键词： carotid restenosis angioplasty

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SPR Method and Its Utilisation for Low Alcohols Concentrations Determination

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Journal of Modern Physics 2015年第4期6卷 363-368页

作者： Michal Lesnák Frantisek Staněk Ivo Hlavatý Jaromír Pistora Jan procházka Institute of Physics Technical University of OstravaOstravaCzech Republic Department of Mechanical Technology Technical University of OstravaOstravaCzech Republic Nanotechnology Centre Technical University of OstravaOstravaCzech Republic Institute of Mining Engineering and Safety Technical University of OstravaOstravaCzech Republic

SPR sensor with matrix arrangement of nanostructured golden spots enables both the study of low concentrations of substances in solution and the acquisition of information on the spatial layout of the diagnosed medium in solution. The linear response of this sensor was experimentally specified for standard solutions of alcohols in a concentration range of 0.01 - 0.5 wt%. The influence of signal noise generated by carrier substance flowing through sensing dots has been removed by data processing. This approach enables to determine refractive index changes less than 3 × 10-6.

关键词： Plasmon Resonance Alcohols Concentration of Solutions

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Multipacting phenomenon at high electric fields of superconducting cavities

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Chinese Physics B 2005年第3期14卷 494-499页

作者：朱凤 D.proch 郝建奎 InstituteofHeavyIonPhysics PekingUniversityBeijing100871China DeutschesElectronen-Synchrotron Notkestrasse8522603HamburgGermany

Recently multipacting(MP) recalculation of the TeV Energy Superconductiong Linear Accelerator (TESLA)resonator was performed. In addition to the normal MP which occurs at a peak electric field of around 40MV/m for the TESLA cavity, another type of multipacting with resonant electron trajectory that is far from the equator is also *** occurs at a gradient around 60MV/m to 70MV/m. This result seems to explain some experimental observations.

关键词： multipacting TESLA cavity

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CHEMOMECHANICAL PROPERTIES OF FRC BASED ON NON-TRADITIONAL FIBERS

CHEMOMECHANICAL PROPERTIES OF FRC BASED ON NON-TRADITIONAL F...

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The International Symposium on Innovation & Sustainability of Structures in Civil Engineering

作者： P. P. procházka V. Machovi F. Kolá P. Kuklík Czech Association of Concrete Engineers Prague Czech Republic Central Laboratories Institute of Chemical Technology in Prague Czech Republic Institute of Rock and Structure Mechanics Academy of Sciences PragueCzech Republic Czech Technical University Prague Czech Republic

＜正＞The fibers play very important role particularly during curing process of concrete, as they suppress local cracking and warping in the composite. Very important fact follows from plenty of experimental studies: since fibers have different stiffness from concrete itself, interfacial mechanical properties have to be solved when requiring knowledge about the bearing capacity of the structure. From this it follows that the values of parameters for contact conditions are very important. Simultaneously, the chemical, numerical, and mechanical results have to be compared at different stages of curing process of concrete. This will be carried out for one of non-traditional materials of fibers, which appears to be very cheap and need recycling. We are going to treat modified waste PET bottle （polyethylene terepthalate） fibers in this paper, which should substitute local reinforcement in plasters of old buildings. Mechanical properties are calculated from convergence procedure involving numerical and chemical （mechanical） tests. Chemical properties of interfacial zones of concrete and fibers are studied by the Raman spectroscopy. Couple of exam- pies will demonstrate the ability of the approach above mentioned.

关键词： Fiber reinforced concrete and mortars PET bottle reinforcement raman spectroscopy eigenparameters.

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EARTHQUAKE PATTERN IN CENTRAL EUROPE

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地震工程学报 1992年第4期 94-102页

作者： Dana procházková Geoscience Plickova 565 14900 Praha 4 Czechoslovakia

GEOLOGICAL CHARACTERISTICS OF THE REGION UNDER INVESTIGATION From the geological point of view. the study area (Fig. 1) is mainly formed by the Hercynides and Alpides. Central European Hercynides lie mostly on the outer margin of the Alpine.- Carpathian foredeep. Their principal outcrops are the Bohemian Massif. Black Forest. Vosges. the Rhine slaty mountain range. They are hidden below the platform sediments, between Munich and Berlin, and partly between the Oder and Vistula lineaments. Central European Alpides comprise the region

关键词：地震活动图象 EARTHQUAKE PATTERN IN CENTRAL EUROPE

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Knockdown of apoptosis-inducing factor disrupts function of respiratory complex I

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BIOCELL 2012年第3期36卷 121-126页

作者： MIROSLAV VAˇRECHA DANIELA PÁCLOVÁ JIˇRINA prochÁZKOVÁ PAVEL MATULA DUˇSAN CMARKO AND MICHAL KOZUBEK Centre for Biomedical Image Analysis Faculty of InformaticsMasaryk UniversityBotanická68aBrno 60200Czech Republic Department of Experimental Biology Faculty of ScienceMasaryk UniversityKotláˇrská2Brno 61137Czech Repub-lic Institute of Cellular Biology and Pathology 1st Faculty of MedicineCharles University in PragueAlbertov 4Prague 12801Czech Republic

Recent findings suggest that apoptotic protein apoptosis-inducing factor (AIF) may also play an important non-apoptotic function inside mitochondria. AIF was proposed to be an important component of respiratory chain complex I that is the major producer of superoxide radical. The possible role of AIF is still controversial. Superoxide production could be used as a valuable measure of complex I function, because the majority of superoxide is produced there. Therefore, we employed superoxide-specific mitochondrial fluo- rescence dye for detection of superoxide production. We studied an impact of AIF knockdown on function of mitochondrial complex I by analyzing superoxide production in selected cell lines. Our results show that tumoral telomerase-positive (TP) AIF knockdown cell lines display significant increase in superoxide pro- duction in comparison to control cells, while a non-tumoral cell line and tumoral telomerase-negative cell lines with alternative lengthening of telomeres (ALT) show a decrease in superoxide production. According to these results, we can conclude that AIF knockdown disrupts function of complex I and therefore increases the superoxide production in mitochondria. The distinct effect of AIF depletion in various cell lines could result from recently discovered activity of telomerase in mitochondria of TP cancer cells, but this hypothesis needs further investigation.

关键词： superoxide fluorescence microscopy image analysis mitochondria telomerase

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Metastases of esophageal carcinoma to skeletal muscle:Single center experience

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World Journal of Gastroenterology 2012年第35期18卷 4962-4966页

作者： Jan Cincibuch Miroslav Myslivecek Bohuslav Melichar estmír Neoral Iva Metelková Michaela Zezulová Hana procházková-tudentová Patrik Flodr Miloslava Zlevorová René Aujesky Karel Cwiertka Department of Oncology Palacky University Medical School and Teaching Hospital Department of Nuclear Medicine Palacky University Medical School and Teaching Hospital 1st Department of Surgery Palacky University Medical School and Teaching Hospital Department of Pathology Palacky University Medical School and Teaching Hospital

Metastases of esophageal carcinoma to the skeletal muscle are rare,but the incidence may be increasing because of better diagnosis resulting from widespread use of positron emission tomography/computed tomography(PET/CT).A cohort of 205 patients with esophageal carcinoma treated at our center who had PET/CT between 2006 and 2010 was retrospectively evaluated for the presence of skeletal muscle *** patients had skeletal muscle metastases of esophageal carcinoma,including two patients with squamous cell *** another patient with squamous cell carcinoma of the esophagus and synchronous skeletal muscle metastases,muscle metastases were subsequently shown to be related to second primary pancreatic *** all cases,skeletal muscle metastases were the first manifestation of systemic *** three patients palliation was obtained with the combination of external beam radiation therapy,systemic chemotherapy or surgical *** muscle metastases are a rare complication of esophageal carcinoma.

关键词： Drug therapy Esophageal neoplasms Muscle Skeletal Positron-emission tomography Radiotherapy

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1985—1986年西波希米亚地区的震群活动

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地震译文集 1989年第3期8卷 32-37,55页

作者： proch.,D 候康明

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