We compute several eccentricity-related invariants for small single-defect nanocones and then fit a cubic polynomial through the computed values in order to obtain explicit formulas.

The development of digital levels in the past two decades has progressed rapidly. Although technically inferior, optical levels are not only survived in the modern age but continue to be produced and improved. In this paper we tried to explain this phenomenon, with review of the historical development and current state of precision optical levels.

This paper deals with the process of discussing land usurpation in the territory of Maglaj municipality using appropriate software applications. Drawing procedure of the boundary line between the forest (forest land) and farmland is described. Later are given characteristics of usurped land - lots. Boundary line is drawn on the plans in AutoCAD software, and the database and review drafts of all forest complexes have been made using ArcGIS software application. In this paper three cadastral municipalities are processed (cadastral municipality Ošve, cadastral municipality Moševac and cadastral municipality Ravna).

Explorations of the ore bodies Prlovi 1, Prlovi 2 and Z of the mined ore deposit Prlovi have included ore microscopy of mineral samples from many boreholes. The orebody Prlovi 2 is prospective for the lead (4%) and zinc (3%) concentrations of which 1.89% Pb and 1.58% Zn occur in sulphides and 2.17% and 1.44% in oxides. The purpose of the ore microscopy was to recommend, based on mineral composition and texture, how to enrich the complex sulphideoxide mineral. The paper describes the composition of the intergrown minerals and suggests the method of the mineral product recovery. Illustrations in the paper are good representative microphotographs of the identified and characteristic structural features.

Gravity is considered as the basic physical force in the nature. Modern satellite missions: CHAMP, GRACE and GOCE allowed modeling of the global gravity field with very high accuracy, as well as its spatial and temporal variations. This paper describes the main objectives, characteristics, the latest results of these missions, as well as the expectations of the future observations, and their importance and contributions for the surveying and geodetic practice, and scientific achievements as well, in geodesy, geophysics and hydrology.