Results 21 to 30 of about 12,470 (218)
Photometry of the five marginally studied open clusters Collinder 74, Berkeley 27, Haffner 8, NGC 2509 and VdB-Hagen 4 [PDF]
, 2006 The stellar populations in the outer Galactic disk are nowadays a subject of wide interest. To contribute to a better picture of this part of the Galaxy, we have studied the nature of five marginally investigated star clusters (Collinder 74, Berkeley 27,
Carraro, Giovanni, Costa, Edgardo
core +3 more sources
Extremal values of VDB topological indices over F-benzenoids with equal number of edges.
Mathematical biosciences and engineering : MBE, 2023 The utilization of molecular structure topological indices is currently a standing operating procedure in the structure-property relations research, especially in QSPR/QSAR study.
Fengwei Li, Qingfang Ye, J. Rada
semanticscholar +1 more source
The edge of the young Galactic disc [PDF]
, 2010 In this work we report and discuss the detection of two distant diffuse stellar groups in the third Galactic quadrant. They are composed of young stars, with spectral types ranging from late O to late B, and lie at galactocentric distances between 15 and
André Moitinho +18 more
core +4 more sources
Evidence for strong evolution in galaxy environmental quenching efficiency between z = 1.6 and z = 0.9 [PDF]
, 2017 Indexación: Web of Science; Scopus.We analyse the evolution of environmental quenching efficiency, the fraction of quenched cluster galaxies which would be star forming if they were in the field, as a function of redshift in 14 spectroscopically ...
Cooper, M.C. +9 more
core +1 more source
Global metallicity of globular cluster stars from colour-magnitude diagrams [PDF]
, 2002 We have developed an homogeneous evolutionary scenario for H- and He-burning low-mass stars by computing updated stellar models for a wide metallicity and age range (0.0002$\le Z \le$0.004 and 9$\le t(Gyr) \le$15, respectively) suitable to study globular
Alexander +58 more
core +3 more sources
Theoretical Analysis of Superphenalene Using Different Kinds of VDB Indices
Journal of chemistry, 2022 Topological indices (TIs) are numerical quantities that enable theoretical chemists to analyse molecular structures mathematically. These TIs are essential to exploring chemical compounds using theoretical techniques like QSAR/QSPR methods ...
K. Julietraja +2 more
semanticscholar +1 more source
o-bib. Das offene Bibliotheksjournal, 2022 Nachruf auf den Vorsitzenden des VDB (1997–1999) Klaus ...
Roswitha Poll
doaj +1 more source
Datenschutzrecht und bibliothekarische Praxis
o-bib. Das offene Bibliotheksjournal, 2015 Bericht zur Fortbildungsveranstaltung des vdb-Regionalverbandes Südwest zum Thema „Datenschutzrecht und bibliothekarische Praxis“ am 20. November 2014. Report of the training activity held on 20 th, November 2014 by vdb- Regionalverband Südwest.
Carlheinz Rolf Straub
doaj +1 more source
Energy of a digraph with respect to a VDB topological index
Special Matrices, 2022 Let DD be a digraph with vertex set VV and arc set EE. For a vertex uu, the out-degree and in-degree of uu are denoted by du+{d}_{u}^{+} and du−{d}_{u}^{-}, respectively. A vertex-degree-based (VDB) topological index φ\varphi is defined for DD as φ(D)=12∑
Juan Monsalve, J. Rada
semanticscholar +1 more source
A new look at Sco OB1 association with Gaia DR2 [PDF]
, 2020 We present and discuss photometric optical data in the area of the OB association Sco OB1 covering about 1 squared degree. UBVI photometry is employed in tandem with Gaia DR2 data to investigate the 3 dimensional structure and the star formation history ...
Carraro, G. +5 more
core +2 more sources