Thesis (M.S.)--Mississippi State University. Department of Computer Science. / Title from title screen. Includes bibliographical references.

Thesis (M.S. in Computer Science)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Wen Su, John Gibson. Includes bibliographical references (p. 189). Also available online.

Facebook is the dominant SNS for American students in the United States, and Renren.com is heavily used by Chinese students in China. Chinese international students in the United States are likely to use both the host and home SNSs to keep in touch with their friends in the host and home countries. The purpose of the study is to explore the similarities and differences between host and home SNS use among Chinese international students in the U.S. This study compares their use of Facebook and Renren.com with respect to intensity and patterns of use. It explores how these student sojourners in the U.S. use the two SNSs to build up and maintain their social networks and social capital and how their levels of acculturation to American host culture and maintenance of Chinese home culture are associated with their SNS use. Quantitative data collected through a survey of 212 Chinese international students at the University of Texas at Austin was analyzed to address these research questions. The findings suggest that Chinese international students use Renren.com more intensively than Facebook and prefer Renren.com to Facebook for the purposes of communication and information seeking. They are more likely to use Renren.com than Facebook to interact with Chinese friends whether in the U.S., in China, or in other parts of the world. The intensity of Facebook and Renren.com use were found to be positively associated with bridging social capital, but neither of the two is associated with bonding social capital. Only the intensity of Renren.com use was found to have a positive relationship with maintained social capital. Furthermore, the levels of acculturation to host culture are associated with the intensity of Facebook use, while the levels of maintenance to home culture are associated with the intensity of Renren.com use. / text

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 / One of the core philosophies of the integrated Network Enhanced Telemetry (iNET) project is to leverage standard networking technologies whenever possible to reduce development cost and to allow standard networking applications to function. This also provides the best long-term scalability to new unforeseen applications much as the Internet has grown through its open standards. The Developmental Flight Test phase is currently under way to perform initial flight testing of the Test Article (TA) Network. This paper provides an overview of the planned TA Network Testing and the expected results. Current results from flight testing will be presented at the conference.

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 / One of the core philosophies of the integrated Network Enhanced Telemetry (iNET) project is to leverage standard networking technologies whenever possible to both reduce development cost and to allow standard networking applications to function properly. This also provides the best long-term scalability to new unforeseen applications much as the Internet has grown through its open standards. Unfortunately, the Radio Frequency (RF) channel characteristics do not fully lend themselves to the typical physical layer approaches utilized by Internet Protocol (IP) technologies. The iNET project is developing the Telemetry Network System (TmNS) RF Network to provide a flexible two-way IP telemetry capability. The Developmental Flight Test (DFT) phase is currently under way to perform initial flight testing of the RF Network. This paper provides an overview of the planned RF network testing and the expected results. Current results from flight testing will be presented at the conference.

M. Tech. Electrical Engineering. / High-speed transmission network requires adequate synchronization planning for quality of service. Based on ITU-T synchronization network guidelines, this dissertation proposes a Synchronous Digital Hierachy (SDH) synchronization model catering for loop of synchronization and robust to communications links faults. From candidate schemes for providing synchronization information, we have adopted the master-slave strategy. Heuristics have been developed to assist in the allocation of primary and back-up reference clocks. The contribution lies in the systematic selection of master node placement, the distribution of the reference clock from master node to all slave nodes using shortest path and the allocation of system redundancy by means of clock priority table for each nodal clock. To cater for clock stability and accuracy, the use of atomic clock (Cesium, Rubidium) as frequency standard, in long term basis, has proven that clock s characteristics namely stability and accuracy may be controlled in the midst of jitter/wander. Fiber optics transmission medium has proven to be adequate for optimal clock dissemination with very trivial frequency deviation from the nominal positional instant, traceable to Primary Reference Clock.

Investing in cluster formation or encouraging companies to network in regional strategic networks is a common strategy used by municipalities to promote regional growth in peripheral regions. Previous research has investigated the significance of creating regional advantages by building clusters and regional networks, but researchers have not provided much insight into the problems facing the project management trying to implement such collaboration. In my thesis I describe and analyze a network project in order to shed light upon some of the complications that such a collaboration project might entail. My theoretical framework of analysis rests upon the concept of social capital, a concept that investigates the value that social contacts might incur. I have studied a designed network situated in the Swedish municipality of Söderhamn called Firsam. After the closure of the telecommunications factory of Ericsson/Emerson and the military airbase F15 Söderhamn lost 10 % of its local employment in 2004.The need for regional growth programmes therefore became dire. The companies that prior to the closure worked in close collaboration with the Ericsson/Emerson factory were also looking for new revenue streams to compensate for their loss of business. Collaboration with the local manufacturing companies to create innovative projects and to take on joint tenders seemed to be a perfect solution to the problems facing them and the municipality. In this spirit a regional strategic network called Firsam (Företag i regional samverkan) was initiated. I analyze the Firsam project using two different aspects of the concept social capital:”bonding” and”bridging”. The bonding form of social capital is associated with small and homogeneous groups that build prerequisites for long-term collaboration by forming close contacts and building trust. The bridging form of social capital creates an open stance towards social relations that enables new contacts to be formed outside one’s own socially established context. The bonding form of social capital provides prerequisites for close collaboration but can also result in close-mindedness and over-embeddedness in one’s own social context. Building bridging connections outside one’s own social context might encourage innovative thinking and spur entrepreneurship. The somewhat fleeting connections that are associated with the bridging form of social capital might on the other hand make it difficult to cultivate a common sense of trust within an existing group. These different manifestations of social capital create a paradox that might be hard to handle in the design of a regional strategic network. Is it best to support already existing network structures and impose the risk of creating a less innovative environment, or should members from outside the established social context be included in the network design to encourage innovative thinking? There are both positive and negative effects associated with either strategy. I shed light upon this paradox by analyzing the regional strategic network of Firsam.

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Network topologies play a vital role in chip design; they largely determine the cost of the network and significantly impact performance in many-core architectures. We propose a novel set of on-chip networks, dodecs, and illustrate how they reduce network diameter with randomized low-radix router connections. In addition, we design an adaptive routing algorithm for dodec networks to achieve high throughput. By introducing randomness, dodec networks exhibit more uniform message latency. By using low-radix routers, dodec networks simplify the router microarchitecture and attain 20% area and 22% power reduction compared to mesh routers while delivering the same overall application performance for PARSEC. We compare our dodec network to alternative low-radix network topologies and show that at the same cost, dodec networks increase the throughput up to 50% while reducing average latency by 10% compared to a mesh.

Complex Network Topologies (CNTs)–network holes and cuts–often occur in practical WSN deployments. Many researchers have acknowledged that CNTs adversely affect the performance of location-based routing and proposed various CNT- aware location-based routing protocols. However, although they aim to address practical issues caused by CNTs, many proposed protocols are either based on idealistic assumptions, require too much resources, or have poor performance. Additionally, proposed protocols are designed only for a single routing primitive–either unicast, multicast, or convergecast. However, as recent WSN applications require diverse traffic patterns, the need for an unified routing framework has ever increased. In this dissertation, we address these main weaknesses in the research on location- based routing. We first propose efficient algorithms for detecting and abstracting CNTs in the network. Using these algorithms, we present our CNT-aware location- based unicast routing protocol that achieves the guaranteed small path stretch with significantly reduced communication overhead. We then present our location-based multicast routing protocol that finds near optimal routing paths from a source node to multicast member nodes, with efficient mechanisms for controllable packet header size and energy-efficient recovery from packet losses. Our CNT-aware convergecast routing protocol improves the network lifetime by identifying network regions with concentrated network traffic and distributing the traffic by using the novel concept of virtual boundaries. Finally, we present the design and implementation details of our unified routing framework that seamlessly integrates proposed unicast, multicast, and convergecast routing protocols. Specifically, we discuss the issues regarding the implementation of our routing protocols on real hardware, and the design of the framework that significantly reduces the code and memory size to fit in a resource constrained sensor mote. We conclude with a proactive solution designed to cope with CNTs, where mobile nodes are used for “patching” CNTs to restore the network connectivity and to optimize the network performance.