Evaluating LoRaWAN connectivity in a marine scenario

The growing need for interoperability among the different oceanic monitoring systems to deliver services able to answer the requirements of stakeholders and end-users led to the development of a low-cost machine-to-machine communication system able to guarantee data reliability over marine paths. In this framework, an experimental evaluation of the performance of long-range (LoRa) technology in a fully operational marine scenario has been proposed. In-situ tests were carried out exploiting the availability of (i) a passenger vessel and (ii) a research vessel operating in the Ligurian basin (North-Western Mediterranean Sea) both hosting end-nodes, and (iii) gateways positioned on mountains and hills in the inland areas. Packet loss ratio, packet reception rate, received signal strength indicator, signal to noise, and expected signal power ratio were chosen as metrics in line of sight and not the line of sight conditions. The reliability of Long Range Wide Area Network (LoRaWAN) transmission over the sea has been demonstrated up to more than 110 km in a free space scenario and for more than 20 km in a coastal urban environment

Testing Lorentz symmetry with atoms and Light

This article reports on the Fifth Meeting on CPT and Lorentz Symmetry, CPT'10, held at the end of June 2010 in Bloomington, Indiana, USA. The focus is on recent tests of Lorentz symmetry using atomic and optical physics.Comment: 10 pages; invited conference report for CAMOP section of Physica Script

Immune complexes in cord serum: influence of sex, gestational age, and Rh- blood group--possible predictive value of high levels for early postnatal infections.

The levels of immune complexes (IC) were found to be lower in the cord sera of healthy full-term neonates than in the sera of blood donors. Among 26 neonates with high levels of IC, 21 (80%) were boys. IC levels were lower in neonates born before 37 weeks of gestation as they were in Rh- neonates. The main finding was that neonates with high levels of IC constitute a population at risk of developing an infection during the first week after birth: 48% as against only 9.5% with normal levels of IC, IC levels did not correlate with either the concentration of IgM, orosomucoid, bilirubin or the leucocyte count in cord blood nor were they clearly dependent on parity

Particle Counting Immunoassay (PACIA) of Ferritin

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