Results 51 to 60 of about 968,206 (211)

New Proposal for Search and Rescue in the Sea [PDF]

open access: yesTransNav, 2011
Currently the security of a ship would be reduced if among its systems don't have some able to indicate its position, providing the necessary data to try that the Rescue System begin a rescue in the event of emergency or catastrophe.
Isidro Padron Armas   +4 more
doaj  

How Can Microwave Observations at 23.8 GHz Help in Acquiring Water Vapor in the Atmosphere over Land?

open access: yesRemote Sensing, 2021
Due to concerns about radio frequency interference from emerging telecommunications technology, there have been intensive discussions on the changes to the international Radio Regulations around 24 GHz at the recent World Radiocommunication Conference in
Quanhua (Mark) Liu   +3 more
doaj   +1 more source

The Hunga Tonga‐Hunga Ha'apai Volcanic Eruption as Seen in Satellite Microwave Observations and MiRS Temperature Retrievals

open access: yesGeophysical Research Letters, 2023
The strongest volcanic eruption since the 19th century occurred on 15 January 2022 at Hunga Tonga‐Hunga Ha'apai, generating unprecedented atmospheric waves not seen before in observations.
Yong‐Keun Lee   +3 more
doaj   +1 more source

Culture conditions influence satellite cell activation and survival of single myofibers [PDF]

open access: yes, 2018
Single myofiber isolation protocols allow to obtain an in vitro system in which the physical association between the myofiber and its stem cells, the satellite cells, is adequately preserved.
Adamo, Sergio   +5 more
core   +2 more sources

HPIPS: A High-Precision Indoor Pedestrian Positioning System Fusing WiFi-RTT, MEMS, and Map Information

open access: yesSensors, 2020
In order to solve the problem of pedestrian positioning in the indoor environment, this paper proposes a high-precision indoor pedestrian positioning system (HPIPS) based on smart phones.
Lu Huang   +6 more
doaj   +1 more source

Modelling and Preliminary Prediction of Thermal Balance Test for COMS

open access: yesJournal of Astronomy and Space Sciences, 2009
COMS (Communication, Ocean and Meteorological Satellite) is a geostationary satellite and developed by KARI for communication, ocean and meteorological observations.
Hyoung Yoll Jun   +2 more
doaj   +1 more source

Chemical Conversion Coatings on Magnesium Alloys - A Comparative Study

open access: yesInternational Journal of Electrochemical Science, 2008
Comparative studies on some of the important chemical conversion coatings viz, stannate, cerium oxide, chromate and galvanic black anodizing on magnesium alloy AZ31B have been conducted.
A.R. Shashikala   +3 more
doaj   +1 more source

Combination of Smartphone MEMS Sensors and Environmental Prior Information for Pedestrian Indoor Positioning

open access: yesSensors, 2020
In view of the inability of Global Navigation Satellite System (GNSS) to provide accurate indoor positioning services and the growing demand for location-based services, indoor positioning has become one of the most attractive research areas.
Lu Huang   +6 more
doaj   +1 more source

An Indoor DFEC Ranging Method for Homologous Base Station Based on GPS L1 and BeiDou B1 Signals

open access: yesSensors, 2020
High-precision navigation and positioning technology for indoor areas has become one of the research hotspots in the current navigation field. However, due to the complexity of the indoor environment, this technology direction is also one of the research
Heng Zhang   +6 more
doaj   +1 more source

LARES succesfully launched in orbit: satellite and mission description

open access: yes, 2013
On February 13th 2012, the LARES satellite of the Italian Space Agency (ASI) was launched into orbit with the qualification flight of the new VEGA launcher of the European Space Agency (ESA). The payload was released very accurately in the nominal orbit.
Ciufolini, Ignazio, Paolozzi, Antonio
core   +1 more source

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