Mobile/Personal Satcoms System Alternatives — Satellite and Network Aspects

Huber, Josef F.

doi:10.1007/978-1-4471-3023-9_16

Cited by 5 publications

(3 citation statements)

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“…In addition, results provided by the software REFPROP 7 [17] and REFPROP 8 are plotted in figures 1 to4 at the same conditions. It should noted that, after inquiry to the REFPROP software editor, [18], it seems that REFPROP7 is based on an empirical correlation of the same kind as the one used in ref. [19] which is adjusted to an experimental database.…”

Section: H 2 S Dynamic Viscositymentioning

confidence: 99%

Dynamic viscosity estimation of hydrogen sulfide using a predictive scheme based on molecular dynamics

Galliéro

Boned

2008

Fluid Phase Equilibria

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An approach based on molecular dynamics results on Lennard-Jones spheres is proposed to model the viscosity of hydrogen sulfide, H 2 S. The molecular parameters, that have a strong physical meaning, are the depth of the potential, and the length at which the potential is null (the "molecular diameter"), which take into account the dipolar moment of the hydrogen sulphide through an isotropic dipolar approximation. The interest of the method is that the adjustment does not involve any viscosity data because only density values have been used in order to estimate the molecular parameters. Consequently, the model is entirely predictive. A comparison between the data generated by our model, REFPROP7 and REFPROP8 database and the few available experimental viscosity data (dilute gas and saturated liquid) is performed and clearly demonstrates the performance of this predictive model. It is even shown that this model is, without fitting, slightly better than REFPROP7 and REFPROP8 which uses viscosity experimental database to adjust their parameters. In addition, in typical petroleum reservoirs conditions, it is shown that non negligible deviations appear when comparing results predicted by REFPROP7, REFPROP8 and the model proposed. Due to its predictive nature, we believe that the values evaluated by the proposed model make sense in such reservoir conditions, at least for industrial purposes. Moreover, the scheme proposed is shown to be very easily extended to deal with mixtures involving H 2 S with the limit that the Lennard-Jones fluid model is appropriate for the other species of the mixtures.

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Section: H 2 S Dynamic Viscositymentioning

confidence: 99%

Dynamic viscosity estimation of hydrogen sulfide using a predictive scheme based on molecular dynamics

Galliéro

Boned

2008

Fluid Phase Equilibria

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“…Indeed, another interoperator, called OAA-KQML-Bridge [4] was developed in parallel with ours. OAA-KQML-Bridge connects the TEAMCORE agent [6], "TeamQuickSet", to the OGI 3 OAA agents.…”

Section: Related Workmentioning

confidence: 99%

Agent interoperation across multiagent system boundaries

Giampapa

Paolucci

Sycara

2000

Proceedings of the Fourth International Conference on Autonomous Agents

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Recently the number of autonomous agents and multiagent systems (MAS) that have been developed by different developers has increased. Despite efforts for the creation of standards (eg. in communication languages, registration protocols etc.), it is clear that at least in the near term heterogeneous agents and MASs will be prevalent. Therefore, mechanisms that allow agents and/or MASs to interoperate and transact are needed. In this paper we report on a case study and lessons learned of an interoperator agent we developed. We discuss requirements for interoperation mechanisms, resulting challenges and our design decisions and implementation of the RETSINA-OAA InterOperator 1.

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“…In this paper, a handover procedure is considered which is based on the signal quality received by the mobile user. According to a de-centralized implementation, the handover procedure is "mobile controlled' (3) C121: when, on the basis of the perceived signal quality by the Mobile Station (MS), a suitable handover criterion is met (see below), the MS sends to the current satellite a handover request message. During this procedure all messages between the MS and the satellite system are exchanged via the old spot-beam; this is a backward handover procedure.…”

Section: Introductionmentioning

confidence: 99%

Performance comparison of different dynamic channel allocation techniques for mobile satellite systems

Fantacci

Giambene

1997

Trans Emerging Tel Tech

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Abstract. Dynamic Channel Allocation (DCA) techniques permit a high resource utilization in cellular networks and are able to adapt themselves in the presence of rapid variations of traffic loads offered to the cells. Therefore, they are particularly suitable for Mobile Satellite Systems (MSSs). This paper compares the performance of several DCA solutions that are based on the evaluation of a cost function in terms of both quality of service parameters (i.e., blocking probabilities) and signaling load to be supported by the system. Both GEostationary Orbit (GEO) and Low Earth Orbit (LEO) MSSs have been considered. A particularly interesting DCA solution is proposed that tries to serve a new call attempt in a cell where no channel is available by means of a channel reconfiguration in an interfering cell. Handover requests that do not attain immediately service can be queued for a maximum time in order to enhance system performance.

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Mobile/Personal Satcoms System Alternatives — Satellite and Network Aspects

Cited by 5 publications

References 0 publications

Dynamic viscosity estimation of hydrogen sulfide using a predictive scheme based on molecular dynamics

Dynamic viscosity estimation of hydrogen sulfide using a predictive scheme based on molecular dynamics

Agent interoperation across multiagent system boundaries

Performance comparison of different dynamic channel allocation techniques for mobile satellite systems

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