Results 121 to 130 of about 261,794 (327)
A relativistic positioning system exploiting pulsating sources for navigation across the Solar System and beyond [PDF]
, 2011 We introduce an operational approach to the use of pulsating sources, located at spatial infinity, for defining a relativistic positioning and navigation system, based on the use of null four-vectors in a flatMinkowskian spacetime.
Capolongo, Emiliano +2 more
core
The Galactic Exoplanet Survey Telescope (GEST)
, 2002 The Galactic Exoplanet Survey Telescope (GEST) will observe a 2 square degree field in the Galactic bulge to search for extra-solar planets using a gravitational lensing technique.
Bally, J. +24 more
core +1 more source
The Politics of Framing the Student Problem: Inquiries Into Australian Civics Education, 2006–2024
Australian Journal of Social Issues, EarlyView.ABSTRACT Recurring debates about civics, the kinds of history that should, and should not, be taught in school, and ‘standards debates’ about the ‘basics’ typically follow on the heels of recurring moral panics about the ‘declining’ state of ‘our’ education system.
Patrick O'Keeffe +2 more
wiley +1 more source
Contributions to Geophysics and Geodesy, 2009 The region of Central and Southeastern Europe is covered by numerous GPS networks investigating geo-kinematical behavior of this area. These activities started in early nineties within the several projects as CERGOP and CERGOP-2/Environment.
Linda HIPMANOVÁ
doaj +1 more source
The Anatomical Record, EarlyView.A new musculoskeletal reconstruction and revision of the cranio‐mandibular anatomy of the Devonian arthrodire placoderm Dunkleosteus terrelli from a comparative and functional anatomical perspective. Dunkleosteus is a specialized arthrodire with many specializations for feeding on large vertebrates, and many of its features are part of broader ...
Russell K. Engelman +4 more
wiley +1 more source
Variance Component Estimation for Combination of Terrestrial Reference Frames
, 2007 Combining Terrestrial Reference Frames (TRFs) to frames of superior quality (like the ITRF) usually involves homogenisation by an empirical weighting scheme. Different approaches on variance component estimation have been evaluated for this purpose. The statistically rigorous Helmert estimator has been compared with two other methods: the degree of ...
Bähr, Hermann +2 more
+7 more sources
Application of time series modeling to a national reference frame realization
Geodesy and Geodynamics, 2018 This paper presents an option for modern dynamic terrestrial reference system realization in Uzbekistan for user needs. An additive model is explored to predict patterns of time series and investigate means of constructing forecast time series models in ...
D. Fazilova, Sh. Ehgamberdiev, S. Kuzin
doaj +1 more source
Towards the new Croatian terrestrial reference frame based on CROPOS - preliminary results
, 2016 Since the establishment of CROPOS, almost seven years have passed. Initial and also the last adjustment CROPOS network was carried out in 2008 using only seven 24h session data in GPS Week 1503 (ETRF2000 R05 ; e2008, 83).
Marko Pavasović +2 more
semanticscholar +1 more source
, 2006 Today, the motion of spacecrafts is still described according to the classical Newtonian equations plus the so-called "relativistic corrections", computed with the required precision using the Post-(Post-)Newtonian formalism.
Jean-Pierre Barriot +3 more
core +2 more sources
The Anatomical Record, EarlyView.Abstract The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and Mirischia asymmetrica, the phylogenetic affinities of which are controversial.
Rafael Delcourt +4 more
wiley +1 more source