A set S of vertices of a graph G is a geodetic set if every vertex of G lies in an interval between two vertices from S. The size of a minimum geodetic set in G is the geodetic number g(G) of G. We find that the geodetic number of the lexicographic product G ∘H for non-complete graphs H lies between 2 and 3g(G). We characterize the graphs G and H for which g(G ∘H) = 2, as well as the lexicograp...

Positions and maps of 1608 new compact sources were obtained in twelve sessions observed during 1994–2002 at the VLBA network at 8.4/2.3 GHz. These sources are recommended for use as calibrators for phase reference imaging and as geodetic sources for astrometric/geodetic VLBI applications.

We prove that the topological cycle space C(G) of a locally finite graph G is generated by its geodetic topological circles. We further show that, although the finite cycles of G generate C(G), its finite geodetic cycles need not generate C(G).

Much local government has been utilizing the large scale digital map with Geographic Information System (GIS). GIS will be able to efficiently work and to reduce mapping costs. However, the maintenance and renewal of a map database need much labor and time. However, the updating method of a map is not established yet and, there is little successful example. The purpose of this study is establis...

A new and significant source of information on earthquake studies has been provided by space geodesy. The data which are gathered by various techniques of space geodesy, can quantify potential of seismic activity in the region of interest. To achieve this goal, the main advantage of extra-terrestrial geodetic data in comparison with the conventional data from geology and seismology is the abili...

Geotechnical instruments are used widely as a complementary tool to geodetic methods in monitoring natural and man-made structures. This paper provides an overview of geotechnical instruments used in structural monitoring. The transducers commonly used in geotechnical instrumentation are first introduced. This is followed by an introduction of the various types of instruments including their wo...

NEXTRANS Project No. 125OSUY2.1 VARIATIONAL BAYES METHOD FOR ESTIMATING TRANSIT ROUTE OD FLOWS USING APC DATA By Rabi G. Mishalani, Principal Investigator Professor of Civil, Environmental, and Geodetic Engineering The Ohio State University [email protected] Mark R. McCord, co-Principal Investigator Professor of Civil, Environmental, and Geodetic Engineering The Ohio State University mccord.2@o...

Abstract Very Long Baseline Interferometry (VLBI) experiments are organized within the geodetic, astrometric and astronomical communities for different applications, requiring observation strategies adopted in scheduling. Currently, next-generation geodetic VLBI Global Observing System (VGOS) is being established. Over last years, evidence was presented that delays introduced by angular structu...