Results 61 to 70 of about 171,675 (333)

Accuracy Study of a Single Frequency Receiver Using a Combined GPS/GALILEO Constellation [PDF]

, 2005
As the date of availability of GALILEO approaches, more and more interest appears to pre-evaluate the accuracy of GALILEO and combined GPS+ GALILEO receivers. The majority of simulations made are based on the general use of UERE (often presented as a
Belabbas, Boubeker, Hornbostel, Achim, Sadeque, Mohammed Zafer   +2 more
core  

Remelting of In Situ Fe‐xTiC Metal Matrix Composites by the Sessile Drop Method: Characteristic Temperatures and Microstructural Analysis

steel research international, EarlyView.
Samples with different amounts of TiC (2, 3.5, and 5 wt%) are analyzed in a hot stage microscope, capturing the softening and melting temperatures. It is found that the presence of TiC elevates the melting initiation temperature above the melting point of pure iron.
Anton Perminov, Mariia O. Ilatovskaia, Xingwen Wei, Steffen Dudczig, Olga Fabrichnaya, Olena Volkova   +5 more
wiley   +1 more source

Number of sunspot groups from the Galileo–Scheiner controversy revisited [PDF]

, 2020
We revise the sunspot observations made by Galileo Galilei and Christoph Scheiner in the context of their controversy on the nature of sunspots. Their sunspot records not included in the current sunspot group database, used as a basis to calculate the ...
V. Carrasco, M. C. Gallego, J. Vaquero
semanticscholar   +1 more source

Densities, Surface Tensions, and Viscosities of Molten High‐Silicon Electrical Steels with Different Silicon Contents

steel research international, EarlyView.
Density, surface tension, and viscosity of liquid electrical steels are measured at different temperatures, varying in silicon content between 3 and 6 mass%. Based on this, the density of the steel and the surface tension can be described as a function of temperature and silicon content with new models.
Lukas Neubert, Matheus Roberto Bellé, Taisei Yamamoto, Tsuyoshi Nishi, Hidemasa Yamano, Frank Ahrenhold, Olena Volkova   +6 more
wiley   +1 more source

SCER Spoofing Attacks on the Galileo Open Service and Machine Learning Techniques for End-User Protection

IEEE Access, 2020
Spoofing attacks pose a clear cybersecurity risk for all systems relying on Global Navigation Satellite Systems (GNSS) for time synchronization or positioning.
Francisco Gallardo, A. P. Yuste
semanticscholar   +1 more source

Density, Surface Tension, and Viscosity of Liquid Low‐Sulfur Manganese–Boron Steel via Maximum Bubble Pressure and Oscillating Crucible Methods

steel research international, EarlyView.
Thermophysical properties of liquid low‐sulfur manganese–boron steel with varying boron and sulfur content at different temperatures are investigated. Using maximum bubble pressure and oscillating crucible viscometer methods, density, surface tension, and viscosity are measured.
Matheus Roberto Bellé, Lukas Neubert, Anastasiia Sherstneva, Taisei Yamamoto, Tsuyoshi Nishi, Hidemasa Yamano, Matthias Weinberg, Olena Volkova   +7 more
wiley   +1 more source

Performance Limits of GNSS Code-Based Precise Positioning: GPS, Galileo & Meta-Signals

Italian National Conference on Sensors, 2020
This contribution analyzes the fundamental performance limits of traditional two-step Global Navigation Satellite System (GNSS) receiver architectures, which are directly linked to the achievable time-delay estimation performance.
P. Das, L. Ortega, J. Vilà‐Valls, F. Vincent, É. Chaumette, L. Davain   +5 more
semanticscholar   +1 more source

Investigation of Sulfur Influence on the Atomization of Stainless Steels

steel research international, EarlyView.
The atomization of stainless steels can be greatly influenced by alloying with sulfur. Sulfur addition effectively reduces the surface tension (ST) of the researched steels and subsequently the mean diameter of the resulting powders. A transition of the thermal gradient of ST is also observable.
Gert Bartzsch, Steffen Scherbring, Julia Richter, Javad Mola, Thomas Niendorf, Olena Volkova   +5 more
wiley   +1 more source

GNSS e dati geografici costituiscono la quinta infrastruttura primaria globale

GEOmedia, 2014
2014 is the year of the official start of services provided by European Galileo satellite positioning system, and even if a few years late, the expectations for the induction of a rapidly growing market are many, with expected growth more then doubled by
Renzo Carlucci
doaj   +2 more sources

Nursing and Pluralism: The Work of Michel Serres. [PDF]

Nurs Philos
ABSTRACT Nursing theory should reflect the pluralism inherent in nursing practice. Nurses routinely enact different kinds of knowledge in combination to achieve good nursing care. Nursing theoretical and philosophical literature includes many attempts to engage with epistemological pluralism.
McCaffrey G.
europepmc   +2 more sources