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In the present study, using PVP/VA (Kollidon VA64) as a carrier, a nimodipine (NM) solid dispersion (SD) was prepared by hot-melt extrusion (HME). The effect of temperature during HME, the ratio of NM to Kollidon VA64 and the particle size of the SD after milling on the dissolution behavior were investigated. The temperatures of the extruder barrel zones and die were set as follows: Zone1=140°C, Zone2=150°C,...
A wireless sensor network consists of a large number of sensor nodes scattered in the region of the network which have limited energy and limited computational and sensing ability. Data aggregation is important in this kind of network which can make use of the energy of the sensor nodes efficiently, and reduce the traffic in network by utilizing the abilities of the nodes in local computation and...
Mobile agent which has the features of migration and autonomy can be used in Wireless Sensor Network (WSN). An improved Genetic Algorithm (GA) is proposed to use in mobile agent-based routing algorithm to calculate the best routing for mobile agent's migration in WSN. By improving the arithmetic operators, the improved GA can find the best routing, and optimize the performance of mobile agent-based...
In wireless sensor networks, limiting energy consumption of sensors and prolonging the network lifetime have been important reasons to evaluate routing protocol's performance. This paper proposes a routing metric, which takes into remaining energy and load of the sensor nodes, trying to balance network traffic and protect the low-power and high-load nodes. Base on this metric, we also propose a new...
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