Results 21 to 30 of about 5,777,999 (339)

Complex systems in the history of American English [PDF]

, 2014
Kretzschmar 2009 has demonstrated that language in use, speech as opposed to linguistic systems as usually described by linguists, satisfies the conditions for complex systems as defined in sciences such as physics, evolutionary biology, and economics ...
Kretzschmar, Jr., William A.
core   +1 more source

Integrated GNSS/IMU-Gyrocompass with Rotating IMU. Development and Test Results

Remote Sensing, 2020
The paper presents the developed integrated GNSS/IMU gyrocompass which, unlike the existing systems, contains a single-axis rotating platform with two antennas installed on it and an inertial measurement unit with tactical grade fiber-optic gyros.
Gennadiy Emel’yantsev, Oleg Stepanov, Aleksey Stepanov, Boris Blazhnov, Elena Dranitsyna, Mikhail Evstifeev, Daniil Eliseev, Denis Volynskiy   +7 more
doaj   +1 more source

Improvement of Hipparcos proper motions in declination [PDF]

Serbian Astronomical Journal, 2006
More than a decade elapsed after the HIPPARCOS ESA mission (ESA 1997) observations have been collected. This first astronomical satellite mission was less than 4 years long so that 1991.25 is the epoch of the HIPPARCOS Catalogue. Many other projects have
Damljanović Goran M., Pejović N., Jovanović B.   +2 more
doaj   +1 more source

Design and construction of an optical test bed for LISA imaging systems and tilt-to-length coupling [PDF]

, 2016
The laser interferometer space antenna (LISA) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration.
, , C J Killow, D I Robertson, Dixon G, d’Arcio L, E Fitzsimons, G Fernández Barranco, G Heinzel, H Ward, Heinzel G, K Danzmann, M Chwalla, M Lieser, M Perreur-Lloyd, M Tröbs, M Zwetz, NGO Assessment Study Report ESA document ESA/SRE, O Gerberding, Perreur-Lloyd M, Robertson D I, S Schuster, Seoane P A, Steier F, T S Schwarze, Tröbs M, van Veggel A M A, Wanner G   +27 more
core   +4 more sources

Spatial reference systems [PDF]

Rudarski radovi, Bor, 2012
Geospatial data gained from different sources have to be referenced to the same geodetic datum and coordinate system. Forming of joint reference system enables easier update and geometric harmonization, access, exchange and use of geospatial data. Horizontal and vertical positions of points are no longer independent components.
Nenad Vusovic, Igor Svrkota, Zoran Vaduveskovic   +2 more
openaire   +2 more sources

A Federated Reference Structure for Open Informational Ecosystems

Journal of Interactive Media in Education, 2016
The paper describes the concept of a federated ecosystem for Open Educational Resources (OER) in the German education system. Here, a variety of OER repositories (ROER) (Muuß-Merholz & Schaumburg, 2014) and reference platforms have been established in ...
Richard Heinen, Michael Kerres, Gianna Scharnberg, Ingo Blees, Marc Rittberger   +4 more
doaj   +1 more source

Neurons with stereotyped and rapid responses provide a reference frame for relative temporal coding in primate auditory cortex [PDF]

, 2012
The precise timing of spikes of cortical neurons relative to stimulus onset carries substantial sensory information. To access this information the sensory systems would need to maintain an internal temporal reference that reflects the precise stimulus ...
Brasselet, Romain, Kayser, Christoph, Logothetis, Nikos, Logothetis, Nikos K., Panzeri, Stefano   +4 more
core   +1 more source

Restoration of tropical dry forest: an analysis of constraints and successes across a highly threatened biome

Frontiers in Environmental Science
The tropical dry forest (TDF) biome has undergone a diversity of severe disturbances, with resulting transformations and continued pressures making this biome type one of the Earth’s most threatened.
Natalia Mesa-Sierra, Marinés de la Peña-Domene, Julio Campo, Christian P. Giardina   +3 more
doaj   +1 more source

Einstein's accelerated reference systems and Fermi-Walker coordinates

, 2017
We show that the uniformly accelerated reference systems proposed by Einstein when introducing acceleration in the theory of relativity are Fermi-Walker coordinate systems.
Llosa, Josep
core   +1 more source

Spectral Analysis of the Martian Atmospheric Turbulence: InSight Observations

Geophysical Research Letters, 2022
In this study, we perform spectral analysis of Martian near‐surface turbulence using the in‐situ observations by NASA's InSight lander on Mars.
Orkun Temel, Cem Berk Senel, Aymeric Spiga, Naomi Murdoch, Don Banfield, Ozgur Karatekin   +5 more
doaj   +1 more source