We present near infrared photometric observations in filters J and K of M 32. Isophotal maps with an angular resolution of 93 pc are presented, radial J. K averaged profiles are derived and the
characteristic surface brightness and effective radius are obtained. The isophotal maps show a major axis angular displacement of 25° with respect to the position angle measured by previous authors from B band observations.
Chartrand et al. (2004) have given an upper bound for the nearly antipodal chromatic number ac′ (Pn) as (n−2 2 ) + 2 for n ≥ 9 and have found the exact value of ac′ (Pn) for n = 5, 6, 7, 8. Here we determine the exact values of ac′ (Pn) for n ≥ 8. They are 2p 2 − 6p + 8 for n = 2p and 2p 2 − 4p + 6 for n = 2p + 1. The exact value of the radio antipodal number ac(Pn) for the path Pn of order n has been determined by Khennoufa and Togni in 2005 as 2p 2 − 2p + 3 for n = 2p + 1 and 2p 2 − 4p + 5 for n = 2p. Although the value of ac(Pn) determined there is correct, we found a mistake in the proof of the lower bound when n = 2p (Theorem 6). However, we give an easy observation which proves this lower bound.
For an abelian lattice ordered group G let conv G be the system of all compatible convergences on G; this system is a meet semilattice but in general it fails to be a lattice. Let and be the convergence on G which is generated by the set of all nearly disjoint sequences in G, and let a be any element of conv G. In the present paper we prove that the join and V a does exist in conv G.
The neutron time-of-flight spectrometer (NEAT) at Helmholtz-Zentrum Berlin has a long history of successful application for studying dynamics and function over very broad time and space domains ranging from 10-14 to 10-10 seconds and from 0.05 up to approximately 5 nanometres, respectively. Started originally in 1995 as NEAT I, NEAT II has been fully rebuilt in order to address the needs of the user community for more powerful instruments. From the end of January 2017 researchers from all over the world will be able to investigate the structure and dynamics of substances, including under extreme conditions., Veronika Grzimek, Gerrit Günther, Margarita Russina:., and Obsahuje seznam literatury
The perception of danger represents a crucial component of everyday life (not only) in the city. The recording of the development of perception of danger in diachronic perspective of the twentieth century, as it reflected in the memory of the female inhabitants of Pilsen, enables to ascertain some changes that reflect the historical development. In its concrete parts, the research focused on the modes of „making“ of the urban space through the perception of danger (mental topography of danger), the perception of danger in general, as wall as the impact of the danger on the everyday life of the inhabitants. The qualitative methodology of the research included the making of mental maps and the half-structured interviews. The informers were nine women of age 80–91 years. For the purpose of presentation of the results of the research that aimed at ascertaining the ways of perceiving danger by the oldest generation of female inhabitants of Pilsen, the twentieth century was divided into several periods that to great degree reflected the political-historical development: the period before the Second World War; the period of the war; after-war period (1945–1960), the 1960s to 1980s and finally the period after the year 1990 up to the present. In the memory of the informers, these periods were characterized partly by differing types of danger (if danger at all) and their varying intensity. The perception of danger (or the absence of danger) was also influenced by the different development of life cycles in cases of concrete women. Besides individual differences, there was crucial influence of the general social development, the development of the city and the technological development, especially the increase of automobile transport and the media of communication.
V článku autor upozorňuje na velmi rychlý ústup krasce Eurythyrea quercus (Buprestidae) z jeho donedávna nejrozsáhlejších lokalit v České republice, a to v dolní části jihomoravského luhu. Až do začátku 90. let minulého století se jeho zdejší metapopulace zdála být dostatečně stabilní. Po rozsáhlých vodohospodářských úpravách zdejší krajiny však výrazně poklesla hladina spodní vody. A poněvadž tak většina velmi starých solitérních dubů letních (Quercus robur), jeho zdejší jediná živná rostlina na nivních loukách, rychle uschla, ocitl se tak stejně rychle i tento brouk na hranici vymření. Pro jeho záchranu v tomto luhu proto autor doporučuje urychleně vyzkoušet oslunění starých dubů dosud uzavřených v okolních souvislých porostech, a tím vytvořit pro E. quercus nové biotopy., The article warns of the very rapid disappearance of the beetle Eurythyrea quercus (Buprestidae) from the lower section of the South Moravian meadowland, until recently the most extensive sites of the species in the Czech Republic. Until the beginning of the 1990s its local metapopulation seemed to be sufficiently stable. However, after extensive water regime alterations, the groundwater level sank considerably. As the majority of very old solitary Pedunculate Oaks (Quercus robur), its only local host plant on alluvial meadows, are quickly drying up, this beetle has found itself on the brink of extinction., and Mladen Kaděra.
A method of constructing the homogenous catalogue of diffuse objects is outlined. For the present poster, SERC (i.e. blue) plates from the UK Schmidt Telescope Unit were used.