In this paper protocols for home network based on power line communication are presented and compared. CEBus, LonWorks, LnCP and HNCP is considered. Features and MAC protocol are described and layering architecture, MAC performance and Message set are compared.

The research was carried out with the objective of evaluating effect different substrates based on grass roots, air layering in lychee plants. seedlings were planted plastic pots a capacity 10 liters mixture soil, sand and barnyard manure (3:1:1). treatments composed Esfagno as control forage roots: Tifton, Jiggs, Mombaça Tanzânia. Ninety days after planting, their roots removed placed to dry f...

Wireless Sensor Networks are deployed in demanding environments, where application requirements as well as network conditions may change dynamically. Thus the protocol stack in each node of the sensor network has to be able to adapt to these changing conditions. Historically, protocol stacks have been designed with strict layering and strong interface between the layers leading to a robust desi...

A critical problem faced by feedback-merger mechanisms is the lack of information that is discarded due to the hidden nodes in multicast trees. A node is said to be hidden from another if it is located in a sub tree that is a result from a fork in any upstream node. We propose in this paper the virtual layering scheme to avoid the problem caused by hiddennodes in multi-layered multicast video e...

STATEMENT OF THE PROBLEM The success of metal- ceramic- restorations (MCR) depends on the presence of strong bond between porcelain and metal substructure. PURPOSE The purpose of this study was to evaluate the effect of hot pressing technique on the bond strength of a metal-porcelain composite in comparison to layering technique. MATERIALS AND METHOD Thirty Nickel-Chromium specimens were pr...