Gregory Johnson is a Senior Program Manger at Alion Science & Technology, JJMA Maritime Sector. He heads up the New London, CT office which provides research and engineering support to the Coast Guard Academy and R&D Center. He has a BSEE from the USCG Academy (1987) a MSEE from Northeastern University (1993) and a PhD in Electrical Engineering from the University of Rhode Island (2005). Dr. Jo...

Interest in the study of global gravitational models has increased recently all over world because it is necessary for height datum transformations. Today International Center Global Earth Models (ICGEM) provides largest collection produced through data from satellite's missions CHAMP, GRACE, and GOCE ... Etc. To allow easy access internet with its more intelligent technologies, one Gravity Org...

People’s Republic of China is one of the most rapidly developing countries in the world today. There is a great demand on highly actual and accurate spatial information of the whole country, especially of West China which becomes the focus of development of the Chinese government right now and in the next years, but where still not enough topographic maps are available. This raises great challe...

As the computational power of mobile devices increases, so does the demand for more sophisticated applications and services. In particular the demand for location-aware services is likely to increase substantially. Such services will vary in how accurate a position solution they will require. However, there can be little doubt that some will require an accuracy that can only be provided through...

This paper presents an accurate Differential Global Positioning System (DGPS) using multi-layered Neural Networks (NNs) based on the Back Propagation (BP) and Imperialistic Competition Algorithm (ICA) in order to predict the DGPS corrections for accurate positioning. Simulation results allowed us to optimize the NN performance in term of residual mean square error. We compare results obtained b...

Die Erfassung und Vermittlung sowie der Erwerb vielfältiger für erfolgreiches Lehrkrafthandeln bedeutsamer Kompetenzen bilden wichtige Inhalte aktuellen Lehrerbildungsforschung. In vielen Projekten Qualitätsoffensive Lehrerbildung (QLB, BMBF, 2014) werden beispielsweise Erkenntnisse zur relevanter Kompetenzfacetten, zum Verhältnis von Theorie Praxis zu einer wissenschaftsbasierten Wissensvermit...

Autonomous GPS and three differentially corrected GPS (DGPS) sources were tested under static conditions to assess suitability for precision agriculture applications in the vicinity of Hays, KS. DGPS sources included the U.S. Coast Guard Beacon, Wide Area Augmentation System (WAAS), and OmniSTAR, a commercial service. Both WAAS and OmniSTAR broadcast correction messages from geostationary satel...

BACKGROUND The Active Script Programme (ASP) aimed to increase the number of general practitioners (GPs) in Victoria, Australia who deliver appropriate, consistent, and effective advice on physical activity to patients. To maximise GP participation, a capacity building strategy within Divisions of General Practice (DGPs) was used. The objectives of the programme were to (a) train and support GP...