This paper is concerned with the massively multi-player online role-playing game Ultima Online. Because of the large number of players, the evolution of sub-groups, or guilds, are very common. This document contains a general description of Ultima Online and an analysis of a particular guild. I show that the guild can be classified as a virtual community and discuss the importance of its rules ...

PURPOSE OF THE STUDY To present the results of primary total hip arthroplasty (THA) with use of the hemispheric threaded Ultima cup at 8.5-year follow-up. MATERIAL Between 1996 and 1999, a total of 40 Ultima acetabular components were used in 33 patients (15 men and 18 women). The average age at the time of surgery was 61.2 years (range, 45 to 71). By the end of 2006, 36 cups were assessed. I...

A modified integral counting method (MICM) with various quenched samples (MICM-VQ) has been investigated for its applicability for different scintillators using b emitters, C and S. To assess the influence of scintillators, three sets of C quenched standards and two S cocktail series were prepared. Two sets of C quenched standards were used for the toluene-compatible scintillator, the other for...

Sample load capacity, sample compatibility, influence of sample load on (3)H/(14)C counting efficiency, background count rate, figure of merit, quench resistance, and sample stability for nine selected, commercially available, liquid scintillation cocktails are presented in this study. The cocktails tested are Ecoscint A, Insta-Gel Plus, OptiPhase Hisafe 3, OptiPhase Trisafe, Ready Gel, SafeSci...

In this article, the concepts of gH-subgradient and gH-subdifferential interval-valued functions are illustrated. Several important characteristics a convex function, e.g., closeness, boundedness, chain rule, etc. studied. Alongside, we prove that gH-differentiable function contains only gH-gradient. It is observed directional gH-derivative maximum all products between gH-subgradients direction...