The photovoltaic (PV) inverter lifetime is affected by mission profiles, which include the solar irradiance and ambient temperature of installation site. In previous research, design for reliability approach has been used to evaluate PV inverter, where irradiances have measured on a fixed tilt orientation angle. most cases, chosen be latitude angle facing south maximum energy production through...

A micro-Raman spectroscopy study of a multi-coloured (yellow, blue, white, redish-brown and brown-black) tile shard from the Citadel of Algiers was undertaken. XRD and EDX were used as complementary techniques. The study shows that the heterogeneous three-shade yellow pigment on the tile is composed largely of the ancient ternary (Pb-Sn-Sb) pyrochlore oxide with a dominant Pb-O vibration at 127...

This paper presents an asynchronous cascading wake-up MAC protocol for heterogeneous traffic gathering in low-power wireless sensor networks. It jointly considers energy/delay optimization and switches between two modes, according to the traffic type and delay requirements. The first mode is high duty cycle (HDC), where energy is traded-off for a reduced latency in presence of realtime traffic ...

The objective of this work is to study the chemistry groundwater in messaad plateau which located 300km south capital Algiers. results obtained showed that waters are very strongly mineralized overall, with a predominance calcium sulphate facies and chloride facies. high degree mineralization South South-East part area near Oued Messaad. Principal Component Analysis (PCA) has shown increase mai...