Ram-pressure stripped radio tail and two ULXs in the spiral galaxy HCG 97b

We report LOFAR and VLA detections of extended radio emission in the spiral galaxy HCG 97b, hosted by an X-ray bright galaxy group. The extended radio emission detected at 144 MHz, 1.4 GHz and 4.8 GHz is elongated along the optical disk and has a tail that extends 27 kpc in projection towards the centre of the group at GHz frequencies or 60 kpc at 144 MHz. Chandra X-ray data show two off-nuclear ultra-luminous X-ray sources (ULXs) with the more distant one being a suitable candidate for an accreting intermediate-mass black hole (IMBH) embedded in an environment with an increased density of molecular gas. Given the observed morphology in optical, CO, and radio continuum, we propose that the galaxy is undergoing ram-pressure stripping and the relativistic plasma accelerated in star-forming regions is transported from the galactic disc by galaxy-intragroup medium interaction. Finally, we also demonstrate that the formation of the radio tail could, in principle, be the result of putative IMBH-induced activity, which could facilitate the stripping or inject the radio plasma via jets.Comment: 15 pages, 11 figures, submitted to MNRAS, comments are welcom

Very Large Array Radio Study of a Sample of Nearby X-Ray and Optically Bright Early-type Galaxies

Abstract Many massive early-type galaxies host central radio sources and hot X-ray atmospheres indicating the presence of radio-mechanical active galactic nucleus (AGN) feedback. The duty cycle and detailed physics of the radio-mode AGN feedback is still a matter of debate. To address these questions, we present 1–2 GHz Karl G. Jansky Very Large Array radio observations of a sample of the 42 nearest optically and X-ray brightest early-type galaxies. We detect radio emission in 41/42 galaxies. However, the galaxy without a radio source, NGC 499, has recently been detected at lower frequencies by the Low-Frequency Array. Furthermore, 27/42 galaxies in our sample host extended radio structures and 34/42 sources show environmental interactions in the form of X-ray cavities. We find a significant correlation between the radio flux density and the largest linear size of the radio emission and between the radio power and the luminosity of the central X-ray point source. The central radio spectral indices of the galaxies span a wide range of values, with the majority of the systems having steep spectra and the rest flat spectra. These results are consistent with AGN activity, where the central radio sources are mostly switched on, thus the duty cycle is very high. Seven out of 14 galaxies with pointlike radio emission (Fanaroff–Riley Class 0; FR 0) also show X-ray cavities indicating that, despite the lack of extended radio structures at 1–2 GHz, these AGNs do launch jets capable of inflating lobes and cavities.</jats:p

Development and Education of Employees through Outdoor Activities in the Insurance Company ČSOB

Title: Development and Education of Employees through Outdoor Activities in the Insurance Company ČSOB Objectives: The aim of this thesis is based on the findings of the current state of human resource management, methods of development and education of workers in ČSOB Insurance Company subsequent design changes in the field of human resources. Furthermore, finding effective solutions for improvement in cooperation, communication and business development of human potential through experiential outdoor activities. Methods: Analysis of documents, SWOT analysis, interviews. Results: Creation of draft recommendations for future planning strategy for education and staff development. The focus of this thesis is the design of outdoor teambuilding course, which will be able to ČSOB Insurance Management and the Department of Human Resources to include in their plans for training and staff development. Keywords: Training, development, teambuilding, outdoor, team, ČSOB Insurance

Development and Education of Employees through Outdoor Activities in the Insurance Company ČSOB

Title: Development and Education of Employees through Outdoor Activities in the Insurance Company ČSOB Objectives: The aim of this thesis is based on the findings of the current state of human resource management, methods of development and education of workers in ČSOB Insurance Company subsequent design changes in the field of human resources. Furthermore, finding effective solutions for improvement in cooperation, communication and business development of human potential through experiential outdoor activities. Methods: Analysis of documents, SWOT analysis, interviews. Results: Creation of draft recommendations for future planning strategy for education and staff development. The focus of this thesis is the design of outdoor teambuilding course, which will be able to ČSOB Insurance Management and the Department of Human Resources to include in their plans for training and staff development. Keywords: Training, development, teambuilding, outdoor, team, ČSOB Insurance

Communication strategy of HS Sparta Praha

ManagementFaculty of Physical Education and SportFakulta tělesné výchovy a sport

Plasma Treatment of Large-Area Polymer Substrates for the Enhanced Adhesion of UV–Digital Printing

UV–digital printing belongs to the commonly used method for custom large-area substrate decoration. Despite low surface energy and adhesion, transparent polymer materials, such as polymethylmethacrylate (PMMA) and polycarbonate (PC), represent an ideal substrate for such purposes. The diffuse coplanar surface barrier discharge (DCSBD) in a novel compact configuration was used for substrate activation to improve ink adhesion to the polymer surface. This industrially applicable version of DCSBD was prepared, tested, and successfully implemented for the UV–digital printing process. Furthermore, wettability and surface free energy measurement, X-ray photoelectron spectroscopy, atomic force, and scanning electron microscopy evaluated the surface chemistry and morphology changes. The changes in the adhesion of the surface and of ink were analyzed by a peel-force and a crosscut test, respectively. A short plasma treatment (1–5 s) enhanced the substrate’s properties of PMMA and PC while providing the pre-treatment suitable for further in-line UV–digital printing. Furthermore, we did not observe damage of or significant change in roughness affecting the substrate’s initial transparency