International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California / The VHF air/ground data link of CAAC is introduced in detail. This paper proposes a solution of VHF air/ground data link system, which exchanges downlink messages and uplink messages in data link information processing networks. The following topics are covered in this paper: components of VHF data link; data processing and design about VHF data link Gateway system; the application of VHF air/ground data link in airlines.

A person's friends, neighbours and other social relationships can have a large impact on their economic outcomes. We examine three important ways that networks can affect people's lives: when networks describe who they communicate with, who they can trust, and who benefits from their public good provision. We analyse information transmission in networks in a new, intuitive way which removes the problematic redundancy of double counting the signals that travel through more than one walk between nodes. Two-connectedness and cycles of length four play an important role in whether players are `visible', which means that other players can communicate about them. Next, using this approach to network communication, we investigate cooperation and punishment in a society where information flows about cheating are determined by an arbitrary fixed network. We identify which players can trust and cooperate with each other in a repeated game where members of a community are randomly matched in pairs. Our model shows how two aspects of trust depend on players' network position: they are `trusting' if they are more likely to receive information about other players' types; and they are `trusted' if others can communicate about them, giving them strong incentives not to deviate. Lastly, in networks with private provision of public goods, we show that a `neutral' policy corresponds to a switch in the direction of the impact of income redistribution. Where redistribution is non- neutral, we can identify the welfare effects of transfers, including whether or not Pareto-improving transfers are possible. If not, we find the implicit welfare weights of the original equilibrium. In this setting, we also identify a transfer paradox, where, counter-intuitively, a transfer of wealth between economic agents can result in the giver being better off at the new Nash equilibrium, while the recipient is worse off.

Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 237-254). Available also in a digital version from Dissertation Abstracts.

>Magister Scientiae - MSc / This thesis validates that packet aggregation is a viable technique to increase call capacity for Voice over Internet Protocol over wireless mesh networks. Wireless mesh networks are attractive ways to provide voice services to rural communities. Due to the ad-hoc routing nature of mesh networks, packet loss and delay can reduce voice quality. Even on non-mesh networks, voice quality is reduced by high overhead, associated with the transmission of multiple small packets. Packet aggregation techniques are proven to increase VoIP performance and thus can be deployed in wireless mesh networks. Kernel level packet aggregation was initially implemented and tested on a small mesh network of PCs running Linux, and standard baseline vs. aggregation tests were conducted with a realistic voice traffic profile in hop-to-hop mode. Modifications of the kernel were then transferred to either end of a nine node 'mesh potato' network and those tests were conducted with only the end nodes modified to perform aggregation duties. Packet aggregation increased call capacity expectedly, while quality of service was maintained in both instances, and hop-to-hop aggregation outperformed the end-to-end configuration 4:1. However, implementing hop-to-hop in a scalable fashion is prohibitive, due to the extensive kernel level debugging that must be done to achieve the call capacity increase. Therefore, end-to-end call capacity increase is an acceptable compromise for eventual scalable deployment of voice over wireless mesh networks.

The scientific and socio-political dimensions of volcanic hazards have been realigned since the eruption of Eyjafjallajökull in 2010, and have highlighted the need for volcanic activity to be studied from interdisciplinary perspectives. By focussing on communication, adaptability and resilience, this research explains the links between hazard management and social constructivism. The research question asks how Iceland’s networked approach to managing volcanoes can be understood by analysing the development of communication channels between human stakeholders and non-human technical devices and systems. Fieldwork was conducted in both Iceland and the UK, and a mixed methods approach was used to engage with the network. Research methods consisted of semi-structured interviews, participant observations and archival research. Findings explain the evolution of knowledge exchange, the value of technical innovation, and the need for interactions between local, national and international stakeholders. The study concludes that actors are increasingly empowered by the use of participatory technologies within hazard management, and the development of collaborative engagements between stakeholder communities from scientific and socio-political backgrounds. This research is relevant as it illustrates how the adaptive capacity of hazard networks can be expanded, potentially influencing the approaches that are taken to manage volcanic hazards in less economically developed contexts. In addition, this study can encourage continued interaction between scientists, at-risk communities and the aviation industry in multi-hazard environments such as Iceland.

<p>This thesis documents the development of a communication system that is part of a pluggable game engine for a course in advanced game programming. It covers some techniques and problems in network game programming, a description of the developed system and an example of how the system is used in a demo of the game engine.</p>

ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA / This paper analyzed protocols may be used in each layer in networked telemetry systems, and also presents some deeper researches of the advantages of using synchronous time-division for the physical layer of a networked telemetry system.

Magister Scientiae - MSc / This thesis shows that mobility management protocols for infrastructure Internet may be used in a wireless mesh network environment. In this research Mobile IPv6 and Fast Handover for Hierarchical Mobile IPv6 are successfully implemented in a wireless mesh network environment. Two experiments were carried out: vertical and horizontal handover simulations. Vertical handover simulation involved a heterogeneous wireless environment comprising both wireless local area and wireless mesh networks. An OPNET Mobile IPv6 model was used to simulate the vertical handover experiment. Horizontal handover simulation involved Mobile IPv6 and Fast Handover for Hierarchical Mobile IPv6 applied in ns2 wireless mesh network. The vertical handover results show that MIPv6 is able to manage vertical handover between wireless local area and wireless mesh network. The horizontal handover results illustrate that in mesh networks, Fast Handover for Hierarchical Mobile IPv6's performance is superior to Mobile IPv6. Fast Handover for Hierarchical Mobile IPv6 generates more throughput and less delay than Mobile IPv6. Furthermore, Fast Handover for Hierarchical Mobile IPv6 drops less data packets than Mobile IPv6. The simulations indicate that even though there are multi-hop communications in wireless mesh networks, the performance of the multi-hop routing may not play a big role in the handover performance. This is so because the mesh routers are mostly static and the multi-hop routes are readily available. Thus, the total handover delay is not affected too much by the WMN hops in the paths for signaling message transmission. / South Africa

This thesis documents the development of a communication system that is part of a pluggable game engine for a course in advanced game programming. It covers some techniques and problems in network game programming, a description of the developed system and an example of how the system is used in a demo of the game engine.

The coding of network applications requires a mastery of communication APIs. One important set of communication APIs, socket APIs, are commonly used for coding C++ network applications. Socket APIs, unfortunately, are difficult to master, due to their procedural nature and inherent complexity. PISCES (Platform Independent Socket ClassES), is a C++ socket library that provides a simplified cross-platform interface to BSD-style socket APIs. This thesis analyzes the use of the PISCES library as a teaching tool. The PISCES library was refactored, then used as a basis for a series of introductory undergraduate assignments on network programming. Survey results show that the PISCES-based assignments were effective for introducing novice programmers to socket programming. The comparison of PISCES's series of assignments with those of NetCp and Toll's proposals, provide the inherent simplicity and safety involved in using PISCES's series assignments.