Abstract-The flexible optical networks are the promising solution to the exponential increase of traffic generated by telecommunications networks. They combine flexibility with the finest granularity of optical resources. Therefore, the flexible optical networks position themselves as a better solution than conventional WDM network. In the operational phase, traffic of connections fluctuates. In fact, the user's need is not the same during day periods. Such traffic may experiment evidence of rising working hours, end of months or years and decreases during the night or on holidays. This variation requires the expansion or contraction of the number of frequency slots allocated to a connection to match the exact needs of the moment. The expansion of the traffic around the reference frequency of connection may lead to blockage because it must share frequency slots with neighboring connections in compliance with the constraints of continuity, contiguity, and non-overlapping. In this study, we offer a technique for allocating frequency slots for time-varying traffic connections. We share out the additional traffic load on different spectrum paths by respecting the constraint of time synchronization related to the differential delay to reduce the blocking rate due to traffic fluctuation.

Telemedicine is the use of information and communication technologies to extend healthcare work to the vulnerable in the rural areas. It is unfortunate that telemedicine is yet to be deployed in sub Sahara Africa where there is acute shortage of medical professionals with many rural dwellers without medical facilities. This paper proposes an electronic Patient’s Case-Note to replace existing manual method so as to mitigate the challenges associated with manual record keeping. The tree theory was used to motivate the information follows which the basis for the theoretical framework for the study also presented is the Cyclic structure that depicts information flow in the system. The conceptual model and the algorithms to implement the model are presented. The Model was implemented and few screenshot presented.

In this paper we propose a tool (reference data model) for the improvement of trust, based on blokchain technologies, between the different actors of an electoral process. Our contribution focuses in a first step on the implementation of a data model having all these public attributes and thus public classes whose methods are coupled to cryptographic techniques. In a second step, we propose an underlying formalism of this model using a matrix representation of the different actors, the different transactions and the working criteria allowing to validate these transactions and blockchains. This formalism allows to find a transaction performed by one of the actors of the electoral chain and also the data block in which this transaction is validated. Also, an algorithm allowing to reinforce the trust is proposed.