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There are 339 combinatorial types of generic metrics on six points. They correspond to the 339 regular triangulations of the second hypersimplex ∆(6, 2), which also has 14 non-regular triangulations. 1. The Metric Fan We consider the cone of all metrics on the finite set {1, 2, . . . , n}: Cn = { d ∈ R( n 2 ) : dij ≥ 0 and dij + djk ≥ dik for all 1 ≤ i, j, k ≤ n } . This is a closed convex poin...

Optical spectroscopic observations of GX 339-4 were carried out between 1998 May (X-ray high state) and 1999 May (X-ray low state) over 7 epochs. The equivalent width of Hα increased during the high state then decreased during the low state. The equivalent width of HeII λ4686 decreased over both states. The full-width half-maximum of Hα, Hβ, HeII λ4686 and the Bowen blend increased from 1998 to...

W dzisiejszych czasach komputery można znaleźć praktycznie we wszystkich obszarach działalności człowieka. Nowoczesne społeczeństwo jest niezwykle mocno uzależnione od komputerów—są one wykorzystywane m.in. w edukacji, do zarządzania systemami transportu, w bankowości i handlu, stosują je organizacje rządowe i wojsko. W praktyce komputery wykorzystywane do nadzorowania pracy elektrowni jądrowyc...

The study analyses the phonological interference of phoneme pronunciation [q] by Sundanese and Javanese speakers compared with Arabic speakers. researchers used a descriptive comparative qualitative method. listened, took notes, documented voice recordings male students from ethnic groups when reading Qur'an to collect research data analyse it using Praat software version 6.2.13. From results r...