In almost all studied polling systems, the user leaves the system after his service is completed. There are interesting applications, in which the users demand a second service (or more). For example, in a ferry assisted sparse wireless network, for every local data transfer the ferry has to collect the data from the source and then deliver the same to the sink. This type of application can be ...

Abstract— Much work has been done on designing routing protocols for mobile ad hoc networks. However, existing solutions assume that an end-to-end path exists from a source to a destination. Some ad hoc network scenarios e.g. bus-based vehicular adhoc networks are characterized by frequent partitions and intermittent connectivity. Hence, new routing schemes designed for such networks have emerg...

In this paper we focus on a class of polling systems encountered while modeling the ferry based wireless local area network (FWLAN). A moving ferry, while walking in a predetermined cyclic path, communicates with the static nodes (or users) of the network via a wireless link. The ferry is assumed to stop and communicate with a node that has a packet to send or to receive, when it is closest to ...

The efficiency of operation and interaction “sea ferry/cruise company-sea passenger port-land transport infrastructure” systems directly depends on the dynamic influence external environment, which today determines transition from deterministic models decision-making to probabilistic ones. These changes basis current trends in industry form introduction large cruise ferry ships create need a de...

Several challenges of port/terminal and/or ferry company managers pertain to decisions for the justification of investments and concurrent operational tasks of roll-on/roll-off passenger (RoPax) and roll-on/roll-off (RoRo) systems. This paper explores the possible uses of Modeling and Simulation (M&S) techniques as a decision-support aid for a RoPax/RoRo system managers. A number of use cases a...

Graphene-based electrodes have recently gained popularity due to their superior electrochemical properties. However, the exact mechanisms of electrochemical activity are not yet understood. Here, we present data from NADH oxidation and ferri/ferrocyanide redox probe experiments to demonstrate that both (i) the porosity of the graphene electrodes, as effected by the packing morphology, and (ii) ...

Ubiquitous computing applications or widespread robots interactions execute in unforeseen environments and need to adapt to changeful available services, user needs, and variations of the environment. Context-awareness ability addresses such a need, enabling, through adaptation rules, applications to react to the perceived dynamic variations. Responses to adaptation have to be quick enough to m...

A continuous car ferry line crossing the Saguenay Fjord mouth and traffic from the local whale-watching fleet introduce high levels of shipping noise in the heart of the Saguenay-St. Lawrence Marine Park. To characterize this noise and examine its potential impact on belugas, a 4-hydrophone array was deployed in the area and continuously recorded for five weeks in May-June 2009. The source leve...