network

Distribution network for telecommunications services for subscribers of express train

This article describes the new concept of providing multimedia services, which require bandwidth 12 Mbit/sec, for mobile subscribers moving at speed of 250-350 km/h on train express. This concept is called – interactive heterogeneous telecommunication system (IHTS). Also describe a place of a satellite channel in this network. There are advantages and disadvantages of satellite trunk line in architecture IHTS are also observed in this paper. We consider the signal at the transmitting and receiving side. Defined restrictions on group channel and OFDM symbol separately.

Transformations of the existential manifestations of human being in the network culture

The article analyzes features of the network culture and its impact on the socio-cultural space of a human being, on values and communication existential expressions. Peculiarities of functioning and basic features of network culture are determined.

Problem of reducing energy losses during transmission

In the new economic conditions due to limited energy resources in Ukraine, as well as the privatization of certain energy facilities have become energy losses from the normal reporting rate in one of the control levers of economic efficiency of enterprises energy sector. Among the sites where there are excessive power loss and power generation, electrical distribution network had not attracted much attention. More importantly they had to ensure the necessary level of reliability of electricity consumers.

Advances in the field of nonisocyanate polyurethanes based on cyclic carbonates

The article reviews production and application of the nonisocyanate polyurethanes based on cyclic carbonate oligomers. Nonisocyanate polyurethane (NIPU) networks are obtained by the reaction between the polycyclic carbonate oligomers and aliphatic or cycloaliphatic polyamines with primary amino groups. The result is a crosslinked polymer with β-hydroxyurethane groups of different structure defined as a polyhydroxyurethane polymer. The article discusses NIPU and hybrid NIPU (HNIPU), which also contains epoxy and acrylic compounds.