Using population synthesis tools we create a synthetic Kepler Input Catalogue (KIC) and subject it to the Kepler Stellar Classification Program (SCP) method for determining stellar parameters such as the effective temperature Teff and surface gravity g. We achieve a satisfactory match between the synthetic KIC and the real KIC in the log g versus log Teff diagram, while there is a significant d...

We present the results of an XMM-Newton observation of the young (∼ 2 − 4 Myr) cluster around the hot star σ Orionis. In a previous paper we presented the analysis of the RGS spectrum of the central hot star; here we discuss the results of the analysis of the full EPIC field. We have detected 175 X-ray sources, 88 of which have been identified with cluster members, including very low-mass stars...

Cosmic filaments play a role of bridges along which matter and gas accrete onto galaxies to trigger star formation and feed central black holes. Here we explore the correlations between the intrinsic properties of void galaxies and the linearity RL of void filaments (degree of filament’s straightness). We focus on void regions since the bridge effect of filaments should be most conspicuous in t...

This paper presents a satellite tracking method based on optical celestial images. The proposed method is composed of two acquiring modes that are called Sidereal Stare Mode (SSM) and Track Rate Mode (TRM). To track the unknown satellites, first of all the entire of the sky is observed and the primary knowledge of the satellite location is predicted in SSM. Then, the measured pointing data is c...

11 Inhaltsverzeichnis 19 Abbildungsverzeichnis 21 1 Einführung, methodische Grundlagen und Bezugsrahmen der Arbeit 23 1.1 Einführung zu Wissen und Wissensinfrastrukturen, Aufbau der Arbeit 23 1.2 Bezugsrahmen Wissen und verteilte Arbeitsarrangements 35 1.2.1 Smart Enterprise: Wissensinfrastrukturen für eine vernetzte Wirtschaft 41 1.2.2 Smart Products & Services: WissensServices für Intelligent...

Abstract : We present an efficient reduced−reference video quality assessment method based on local harmonic strength (LHS) feature. LHS is based on harmonics gain and loss information extracted from picture that correspond with the two most prominent compression artifacts, blockiness and blurriness. Efficiency is achieved through further reduction of the reduced−reference overhead. For the LHS...