6 research outputs found
Late-time tails of a Yang-Mills field on Minkowski and Schwarzschild backgrounds
We study the late-time behavior of spherically symmetric solutions of the
Yang-Mills equations on Minkowski and Schwarzschild backgrounds. Using
nonlinear perturbation theory we show in both cases that solutions having
smooth compactly supported initial data posses tails which decay as at
timelike infinity. Moreover, for small initial data on Minkowski background we
derive the third-order formula for the amplitude of the tail and confirm
numerically its accuracy.Comment: 7 pages, 3 figure
Medycyna i Społeczeństwo. Materiały konferencyjne
Ze wstępu: "Z inicjatywy i pod patronatem Krakowskiej Szkoły Wyższej im. Andrzeja Frycza
Modrzewskiego w Krakowie odbyła się w styczniu 2003 r. konferencja naukowa lekarzy,
farmaceutów, biochemików, filozofów, fizjopatologów, farmakologów i klinicystów,
których rozważania skupiały się wokół obszernego tematu „MED YCYNAISPOŁECZEŃSTWO
Spotkanie otworzył JM Rektor Prof. KSW dr hab. Zbigniew Maciąg.
Rektor wyraził podziękowanie wykładowcom i wyraził głęboką nadzieję, że kolejny
numer wydawnictwa Szkoły Acta Academiae Modrevianae, złożony z wybranych
prac prezentowanych na konferencji, służył będzie społeczeństwu."(...
Rola zarządu w zabezpieczeniu stabilności ekonomiczno-społecznej przedsiębiorstwa
Chruściel T. J., Wyszomirski A. The role of the board in securing the economic and social stability of the enterpris
CFD and FEM Model of an Underwater Vehicle Propeller
Within the framework of the project for design and optimization of the Remotely Operated Vehicle (ROV), research on its propulsion has been carried out. Te entire project was supported by CFD and FEM calculations taking into account the characteristics of the underwater vehicle. One of the tasks was to optimize the semi-open duct for horizontal propellers, which provided propulsion and controllability in horizontal plane. In order to create a measurable model of this task it was necessary to analyze numerical methodology of propeller design, along with the structure of a propellers with nozzles and contra-rotating propellers. It was confronted with theoretical solutions which included running of the analyzed propeller near an underwater vehicle. Also preliminary qualitative analyses of a simplified system with contra-rotating propellers and a semi-open duct were carried out. Te obtained results enabled to make a decision about the ROVs duct form. Te rapid prototyping SLS (Selective Laser Sintering) method was used to fabricate a physical model of the propeller. As a consequence of this, it was necessary to verify the FEM model of the propeller, which based on the load obtained from the CFD model. Te article contains characteristics of the examined ROV, a theoretical basis of propeller design for the analyzed cases, and the results of CFD and FEM simulations
Karta wyników jako instrument progresywnego rozwoju przedsiębiorstw
Wyszomirski A., Chruściel T. J., Mania R. Scorecard as an instrument of progressive development of enterprise