Analysis of quartz c-axis fabrics and microstructures from ductily deformed rocks allows for the examination of the kinematics associated with crustal deformation. This thesis expands on the current knowledge of the kinematic evolution of the Himalayas and Scottish Caledonides, by examining samples from the Main Central Thrust (MCT) (Himalayas) and the Sgurr Beag Thrust (SBT) (Scottish Caledonides).  Metamorphic temperatures (Tm) associated above the MCT are inverted; chapter one attempts to test if deformation temperatures (Td) correlate to Tm, indicating that ductile shearing occurred during peak Tm. In the Scottish Caledonides, Td and Tm increase from foreland to hinterland, potentially indicating a right way up thermal structure;  chapter two presents Td and Tm associated with the region around the SBT. Above the MCT, quartz c-axis fabrics yield Td ranging between 500-650 "C, corresponding to the temperatures of dynamic recrystallization for subgrain rotation (SGR) and grain boundary migration (GBM). Up to 1000m above the MCT, Td and Tm are within error of each other, suggesting that shearing occurred during peak Tm; while further away from the MCT  Tm is significantly hotter than Td, suggesting that shearing continued past Tm. Deformation associated with the upper part of the Moine thrust sheet and the SBT yields quartz c-axis fabrics with Td ranging between 395-583 "C, corresponding to the regional dynamic recrystallization. Tm calculations original to this study yield pressure-temperature constraints of 4.8-5.8 kbar and 586-625 "C. Tm is within error of Td, suggesting that deformation and metamorphism were synchronous. / Master of Science

This diploma thesis targets in concept of wing, aileron, flap and main undercarriage of the ultralight replication of the plane L-40 called Meta Sokol. The thesis developed from cooperation with two other members of the team – Alice Lipková (aerodynamics, power) and Miroslav Růžička (fuselage, tail unit and rear gear). The first part of this diploma thesis is concerned with load and concept of structure of the wing. At first the flight envelope is specified, then charakteristics of shearing force, bending moment and torsion moment are determined spanwise. The concept and subsequent strength verification of structure of the wing is also solved. The same process is claimed to concept of the aileron and the flap. The second part of this diploma thesis is dealt with main landing gear, its support, structure, springing and the principle of retraction. The final passage is devoted to load of the undercarriage.

The subject of this diploma thesis is the design solution of the axial headstock, its gear box and main drive. This headstock is used for heavy duty gantry type machines from the production of TOS Kurim company. The thesis contains technical solution of the headstock, an analysis of the construction of the headstock drive, overview of the possible propulsion units, choice of the best drive variant, control calculations, technical proposal of drive design and economical evaluation of the whole reconstruction.

Hydraulic main stages for off highway machines have usually electromagnetic driven pilot valves. You rarely find stepper motor driven pilot systems that are directly positioning the main spool in the sectional control valve. The presented concept shows the development of an actuator in a unique setup to fulfill the requirements of most off- highway applications. Precise positioning, strength, speed and fail safe requirements were the main goals of the concept. The concept has a two phase BLDC transversal flux motor with a single gear stage transmission. The software and control unit are specially designed for this electric motor setup. On a test bench some results of the first samples reveal the technical potential of this concept. The development of the actuator was done in-house of Thomas Magnete GmbH (mechanical, electronical, and software development).

Misinformation remains pervasive in digital platforms, shaping how individuals receive news online. Prior work suggests that credibility perceptions of misinformation can differ based on the modality of the misinformation message. Informed by the MAIN model, this quantitative study conducted two separate 2 (Modality: video or text) x 2 (Social endorsement cues: high vs. low) between-subject experiments to assess the influence of message modality and social endorsement cues on misinformation credibility judgments. The experiments reviewed two different topics of misinformation: artificial intelligence technology malfunction (N = 296) and a cure for cancer (N = 306). Results for Study 1 on artificial intelligent technology malfunction misinformation indicated that participants who viewed the video modality judged a higher perception of source expertise and message credibility. The results of Study 2 suggested that the text presentation of health misinformation prompted higher message elaboration relative to the video conditions. Findings suggest that modality does influence how people judge misinformation messages depending on the subject matter. In addition, source credibility influences how people judge message credibility. The paper concludes with a discussion of theoretical implications and practical applications.

SLUB MAKERSPACE AUSGEZEICHNET \\ „DER BIBLIOTHEKARTAG WAR EINE WUNDERBARE ERFAHRUNG!“ \\ „MIT IDENTIFIERN, INDIKATOREN, NORMDATEN TRANSPARENZ ERHÖHEN – KENNZAHLEN IM BIBTAG-AUFWIND.“ \\ „MEINE VORFREUDE AUF DEN 106. BIBLIOTHEKARTAG BEGANN MIT EINEM BLICK INS PROGRAMM.“ \\ „OPEN ACCESS (OA) GALT DAS HAUPTINTERESSE „MEINES“ BIBLIOTHEKARTAGES 2017.“ \\ SLUB ERHÄLT PREIS FÜR „INFO-COUT“-PROJEKT \\ „VIELE MÖGLICHKEITEN FÜR AUSTAUSCH MIT KOLLEGINNEN UND KOLLEGEN AUS VERSCHIEDENSTEN EINRICHTUNGEN.“

Transcatheter aortic valve replacement in the setting of failed surgical bioprosthesis (valve-in-valve) is a valuable option for patients with bioprosthetic aortic stenosis or regurgitation who are deemed high risk for repeat open heart surgery. Although the procedure is successful with proper preprocedural assessment, instances of left main (LM) coronary artery ostium obstruction have been documented. We present a case of LM coronary obstruction in the immediate postoperative period following implantation of a 20-mm Edwards Sapien 3 valve inside the degenerated 21-mm Mitroflow bioprosthesis stenosis, which was treated with double stenting alongside the Edwards Sapien 3 valve creating a channel (“neo left main”) that extended from mid-LM to the upper margin of the Edwards Sapien 3 valve. Although valve-in-valve in a Mitroflow degenerated bioprosthesis is a relatively safe procedure, 2 or more stents may be necessary to scaffold a channel to the coronary arteries between Edwards Sapien 3 prosthesis and aorta in the event of a coronary obstruction.

Philosophiae Doctor - PhD / This thesis focusses on the hydrocarbon potential of the Prince Albert Formation in terms of its shale gas potential. Unconventional gas production from hydrocarbon-rich shale formations, known as “shale gas”, is one of the most rapidly expanding trends in onshore oil and gas exploration and exploitation today. In South Africa, the southern portion of the main Karoo Basin is potentially favourable for shale gas accumulation and may become a game changer in the energy production regime of the country. The Prince Albert Formation was selected for research, since previous studies in South Africa have focused on shale from the Whitehill Formation, which together with the underlying Prince Albert Formation, occur within the lower Ecca Group in the main Karoo Basin. The petrophysical properties and shale gas potential of the Prince Albert Formation was determined using the parameters of mercury porosimetry, total organic carbon (TOC), vitrinite reflectance, Rock-Eval and residual gas measurements. The lithostratigraphy, rock classification, and depositional environment of the Prince Albert Formation, together with the adjacent parts of the overlying Whitehill Formation and underlying Dwyka Group within the southern part of the main Karoo Basin were addressed. Rock types were characterised using X-ray fluorescence (XRF), X-Ray diffraction (XRD) and statistical analysis. Geochemical proxies and stable isotopes (δ18O, δ13C and δ15N) were used to identify the depositional environment. Additionally, the Dwyka Group, Prince Albert and Whitehill formations were correlated with equivalent Southern Gondwanaland units to understand basin development. The results of the shale gas study of the Prince Albert Formation showed porosities ranging between 0.08 and 5.6%, permeabilities between 0 and 2.79 micro-Darcy, TOC between 0.2 and 4.9 weight % and vitrinite reflectance values between 3.8 to 4.9%. Rock-Eval analysis indicated that the kerogen in the shale was Type III and IV and hydrogen indices were less than 65 mg/g. Free or absorbed gas was not detected in the recently drilled boreholes KZF-01 and KWV-01 used in this study. It is probable that the absence of gas is a result of overmaturity due to tectonic duplication in KZF-01 and thermal degassing associated with dolerite intrusions in KWV-01. Although the porosity and TOC values of the Prince Albert Formation shales across the southern part of the main Karoo Basin are comparable with, but at the lower limits of, those of the gas-producing Marcellus shale in the United States (porosities between 1 and 6% and TOC between 1 and 10 weight %), the high vitrinite reflectance values indicate that the shales are overmature with questionable potential for generating dry gas. A comprehensive rock classification were compiled for the Prince Albert Formation, which consists of shale and minor ferruginous shale ranging between thicknesses of 30 and 168 m based on field work and core descriptions. Mineralogical, geochemical and statistical data, classified collected samples as Fe-shale, phosphatic shale, manganiferous shales, shale, wacke, Fe-sand and litharenite. In unconventional resources, understanding the depositional environment is important in delineating the depositional process and bottom water conditions. The Prince Albert Formation was interpreted as marine forming under dysoxic to euxinic conditions. δ 13C values range between -17.5 and -23.1 ‰ and δ 15N between 8.5 and 11.1 ‰ reflecting marine conditions. Sediments of the Prince Albert Formation were interpreted as middle to outer continental shelf deposits based on various lithologies identified and XRF data (geochemical proxies). Compiled literature of the karoo- type basins in Southern Gondwanaland provides a correlation of the Dwyka Group, Prince Albert and Whitehill formations in South Africa. Based on stratigraphy and radiometric dating, the Dwyka Group, Prince Albert and Whitehill formations have been correlated with lithostratigraphic units in the Falkland Islands, Namibia (Huab, Karasburg and Aranos basins), the Ellsworth Basin of Antarctica and the Sauce Grande and Parana basins of South America. This correlation suggest that the main Karoo foreland system was subjected to very similar tectonic influences present in the other karoo-type basins of Southern Gondwanaland. In conclusion, results from this research indicate that viable conditions for shale gas might exist within the “sweet spot” areas constrained by formation thickness being > 30 m, relative dolerite intrusion of < 20%, relative total organic carbon content > 4 weight %, and maturity of < 3.5%. It is essential that new exploration boreholes be drilled within the “sweet spot” areas to test whether the lower Ecca Group (Prince Albert and Whitehill formations) has the potential to generate viable shale gas.

We present a. survey of high dispersion UV and optical spectra of Herbig Ae/Be (HAeBe) and related stars. We find accreting, circumstellar gas over the velocity range +100 to +400 km s-1, and absorption profiles similar to those seen toward β Pic, in 36% of the 33 HAeBe stars with IUE data as well as in 3 non-emission B stars. We also find evidence of accretion in 7 HAeBe stars with optical data only. Line profile variability appears ubiquitous. As a group, the stars with accreting gas signatures have higher ν sin i than the stars with outflowing material, and tend to exhibit large amplitude (≥ 1m) optical light variations. All of the program stars with polarimetric variations that are anti-correlated with the optical light, previously interpreted as the signature of a dust disk viewed close to equator-on, also show spectral signatures of accreting gas. These data imply that accretion activity in HAeBe stars is preferentially observed when the line of sight transits the circumstellar dust disk. Our data imply that the spectroscopic signatures of accreting circumstellar material seen in β Pic are not unique to that object, but instead are consistent with interpretation of β Pic as a comparatively young A star with its associated circumstellar disk.

Purpose of Review: This article reviews the latest data on unprotected left main (ULM) percutaneous coronary intervention (PCI) versus coronary artery bypass graft (CABG) surgery, with a focus on the NOBLE and EXCEL trials. Recent Findings: In EXCEL trial, the primary endpoint at 3 years was 15.4% in the PCI group and 14.7% in the CABG group (p = 0.02 for non-inferiority of PCI versus CABG). In NOBLE, the primary endpoint at 5 years was 28% and 18% for PCI and CABG, respectively (HR 1.51, CI 1.13–2.0, which did not meet the criteria for non-inferiority of PCI to CABG; p for superiority of CABG was 0.0044). Higher repeat revascularization and non-procedural myocardial infarction were noted in PCI group but there was no difference in all-cause or cardiac mortality between the two groups. Summary: A heart team approach with appropriate patient selection, careful assessment of LM lesions, and meticulous procedural technique makes PCI a valid alternative to CABG for ULM stenosis.