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3412. Analysis of thermally-induced transformations of silica rocks after high temperature heat treatment
- Creator:
- Geng, Jishi, Sun, Qiang, Zhang, Yuchun, and Zhang, Yuliang
- Format:
- print, bez média, and svazek
- Type:
- article, články, journal articles, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, vysoké teploty, high temperatures, silica rocks, non-destructive analytical method, thermal expansion, 7, and 551
- Language:
- English
- Description:
- High temperature alters the internal microstructure of rocks and consequently changes the physical and mechanical properties of rocks. Many studies have been carried out to examine the transformations in the microstructures of rocks under high temperature through near infrared spectroscopy (NIR), Raman spectroscopy, or thermo gravimetric analysis (TGA). The current review synthesizes the data from a number of literatures and summarizes the major transformations of silica rocks under high temperature. The analysis shows that silica rocks starts to lose the water adsorbed in open pores upon heating at about 150 °C. At 200-300 °C, the reaction between SiOH (silanole) in the rocks generates new Si-O-Si bonds as well as H2O, and decreases the open pores. The rocks undergo volume expansion at >550 °C, and the volume contracts and forms new micro pores or cracks which play an important role in the evacuation of the water., Jishi Geng, Qiang Sun, Yuchun Zhang and Yuliang Zhang., and Obsahuje bibliografické odkazy
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3413. Analysis of thoracic impact responses and injury prediction by using FE thoracic model
- Creator:
- Číhalová, Lenka
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- biomechanics, thoracic model, validation, frontal, lateral and oblique impactor test, and injury criterion
- Language:
- English
- Description:
- The previously developed thoracic finite element model [8, 9] was used to investigate the human thoracic dynamic responses associated with the frontal, lateral and oblique loading and to predict injuries of the thorax associated with the frontal loading. The thoracic model was developed [8, 9] to improve the human articulated rigid body model ROBBY (the model of an average adult male) [13, 14], which was previously developed at the University of West Bohemia in cooperation with ESI Group (Engineering Simulation for Industry). There are implemented deformable models of the thorax and abdomen in the ROBBY model. The geometries of individual thoracic organs were based on the cadaver tomography data and color cross-section photographs obtained from Visible Human Project (VHP) [33]. The thoracic model material properties were obtained either by virtue of cooperation with ESI Group or from public sources (articles, Internet, books). Thoracic model includes the models of the sternum, ribs, costal cartilages, vertebrae, lungs, heart, trachea, main vessels (aorta, vena cava superior), intercostal muscles, diaphragm, flesh and skin. The presented study deals with the dynamic response and validation of the whole thoracic model and with the prediction of thoracic injuries by virtue of this model. The results of simulations are compared with the experimental results. and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3414. Analysis of thrombotic complications after catheter ablation
- Creator:
- Haman, Luděk
- Type:
- model:article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3415. Analysis of tissue dependent DNA yield for optimal sampling of micro-moths in large-scale biodiversity surveys
- Creator:
- Lopez-Vaamonde, Carlos, Breman, Floris C., Lees, David C., Van Houdt, Jeroen, and De Prins, Jurate
- Type:
- article, články, model:article, and TEXT
- Subject:
- Zoologie, zoologie, entomologie, Gracillariidae, Cameraria ohridella, DNA barcoding, DNA preservation, DNA quantification, picogreen, 2, and 59
- Language:
- English
- Description:
- DNA barcoding surveys of small insects usually extract DNA from either a complete insect or a leg. Little is known about how to optimize DNA quantity and quality from different insect parts while preserving a morphological voucher. Here, we quantify DNA yield from different body parts (antenna, hind leg, forewing, hind wing and abdomen) of the micro-moth Cameraria ohridella (Lepidoptera: Gracillariidae) using fluorescent nucleic acid stain (PicoGreen). Samples were preserved in 100% ethanol or dried for three weeks. Our experiment was designed to encompass practical sampling options during fieldwork. DNA quality was assessed by PCR amplification of the mitochondrial COI barcode fragment. In addition, we compared PCR amplification using Platinum® Taq and Qiagen DNA Polymerase and quantified sequence success of amplified DNA. We show that overall, dry parts showed higher eluted DNA yields. PCR and sequencing success rate were slightly higher for dry tissue than ethanol-preserved parts. We also show that Platinum® Taq yielded the highest PCR success rate and that all dry tissues are sequenceable. The optimal strategy for DNA barcoding surveys is therefore to mount micro-Lepidoptera specimens in the field for morphological analysis and sample tissues (hind legs are favoured) from dried samples at a later time (several weeks) in the lab for DNA barcoding using preferentially Platinum® Taq. If larger amounts of DNA are required (i.e. for nuclear gene sequencing), several legs from one side of the specimen or the abdomen should be preserved in pure ethanol., Carlos Lopez-Vaamonde ... [et al.]., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3416. Analysis of Tycho's Handwritings /
- Creator:
- Šíma, Zdislav,
- Subject:
- Brahe, Tycho,, astronomie, astronomové, rukopisy, české země 1526-1620, and vědy o neživé přírodě, přírodní prostředí, astronomie
- Language:
- English
- Rights:
- unknown
3417. Analysis of ventricular activation in patients with chronic non-Q wave myocardial infarction: Comparison with left ventricular asynergy and myocardial perfusion defects
- Creator:
- Šťovíček, P., Stojan, M., Kasalický, J., Vondráček, V., Vojáček, J., Linhart, A., and Anger, Z.
- Type:
- article, model:article, and TEXT
- Subject:
- non-Q myocardial infarction, ventricular activation, body surface potential mapping, and vectorcardiography
- Language:
- English
- Description:
- In this report, we dealt with ventricular activation abnormalities in 30 patients with previous non-Q myocardial infarction (Mi) by means of the CARD1AG 128.1 device, which enables analysis of ECGs, VCGs and body surface potential maps. The diagnosis was verified by left ventriculography, echocardiography and perfusion scintigraphy. Twenty-nine healthy subjects served as the control group. Morphological findings confirmed the presence of a significant subgroup with serious left ventricular asynergy. Seven electrocardiological variables, which significantly differed from control values, disclosed that non-Q Ml is responsible for localized activation time prolongation, and that inferoposterior scars tend to delay the entire activation of ventricles, and to cause disturbances of the terminal depolarization phase together with a decrease in voltage production during QRS. Lesions of the anterior wall and the apicomesial part of the inferoposterior wall affect the distribution of the Q wave more often than the posterior basal ones. The probability of such abnormalities increases with the degree of asynergy. Some VCG criteria increase the sensitivity of electrocardiological analysis. These parameters will be used for evaluating the diagnostic value of electrocardiological analysis in the chronic non-Q Ml. Non-Q myocardial infarctions represent a heterogeneous group of infarctions from both electrophysiological and morphological aspects.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3418. Analysis of vertical movements detected by radar interferometry in urban areas
- Creator:
- Kadlečík, Pavel, Vladimír Schenk, Seidlová, Zuzana, and Zdeňka Schenková
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, poddolování, undermining, Praha (Česko), Ostrava (Česko), Prague (Czechia), Ostrava (Czechia), InSAR, PSI, subsidence, 7, and 551
- Language:
- English
- Description:
- Persistent Scatterer Interferometry (PSI), a remote sensing technique, is used for detecting surface deformation in the cities of Prague and Ostrava. PSI is able to detect vertical movements with an accuracy of less than 1 mm for a long time series of the SAR data, but the maximum detectable rate of movement is only a few centimetres per year. This technique is quite suitable for detecting recent movements in most Prague localities. On the other hand, in Ostrava and its surroundings, affected by undermining, where subsidences (1992-2006) amount to decimetres per year, movements cannot be fully detected by the PSInSAR technique. The paper presents results of analysing PSI data for two localities in Prague and one locality in the Ostrava areas. The localities are strictly situated in built-up areas with many suitable reflectors. Data from the ERS-1/2 and ENVISAT satellites covering a 13-year period for the Prague (1992-2005) and a 14-year period for the Ostrava (1992-2006) area were used. Annual movement velocities and time-series of reflectors were determined. At these three localities, where different types of movements were identified, the application and possible limitations of PSI in urban areas are shown., Pavel Kadlečík, Vladimír Schenk, Zuzana Seidlová and Zdeňka Schenková., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3419. Analysis of vertical movements modelling through various interpolation techniques
- Creator:
- Kowalczyk, Kamil, Rapinski, Jacek, and Mroz, Marek
- Format:
- print, bez média, and svazek
- Type:
- article, články, model:article, and TEXT
- Subject:
- Geologie. Meteorologie. Klimatologie, nivelace, interpolace funkcí, leveling, interpolation, vertical crustal movements, 7, and 551
- Language:
- English
- Description:
- The main objective of this paper is to explain how the application of various interpolation methods influence the determination of vertical crustal movements at any given point. The paper compares several methods of interpolation and verifies their suitability, including kriging, minimum curvature, nearest neighbor, natural neighbor, polynomial regression, inverse distance to a power, and triangulation with linear interpolation. The calculations show that the chosen interpolation method has significant influence on the final result of the study. Nearest neighbor method was chosen to be the best., Kamil Kowalczyk, Jacek Rapinski and Marek Mroz., and Obsahuje bibliografii
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3420. Analytical derivation of time spectral rigidity for thermodynamic traffic gas
- Creator:
- Krbálek, Milan
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- thermodynamic traffic gas, clearance distribution, and spectral rigidity
- Language:
- English
- Description:
- We introduce an one-dimensional thermodynamical particle model which is efficient in predictions about a microscopical structure of animal/human groups. For such a model we present analytical calculations leading to formulae for time clearance distribution as well as for time spectral rigidity. Furthermore, the results obtained are reformulated in terms of vehicular traffic theory and consecutively compared to experimental traffic data.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public