ITC/USA 2009 Conference Proceedings / The Forty-Fifth Annual International Telemetering Conference and Technical Exhibition / October 26-29, 2009 / Riviera Hotel & Convention Center, Las Vegas, Nevada / The nXCVR-2000G transceiver is an 802.11a OFDM-based system undergoing performance studies that uses both simulation and laboratory tests. The multi-path channel model used in the simulation experiments is based on a telemetry multi-path channel model described in the iNET Telemetry Experimental Standard document. To date, the results using the simulation have been confirmed by outdoor laboratory tests. They show that multi-path has less impact on the OFDM performance when the channel spread is within a limit of 800ns; the same specified guard interval (GI) used by 802.11a. For example, with a channel spread of 144ns (τ1) and a reflection coefficient of -0.26dB (Γ1), the Error Vector Magnitude (EVM) is on the order of 2.5%. As the channel spread expands beyond the standard GI 800ns, the demodulated signal degrades. The performance penalty depends upon the channel spread factor and the total Signal to Interference plus Noise Ratio (SINR).

ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / iNET is a project tasked to foster advances in networking and telemetry technology to meet emerging needs. This paper describes one objective of the project, which is standardization and interoperability. It begins to explore issues for achieving a level of interoperability among differing vendor’s hardware such as data acquisition units, data recorders, video systems, transceivers, and network encryption. Specifically, this paper addresses the expansion of the current demonstration system with the addition of multiple vendor data acquisition units. It will also attempt to address the level of standardization necessary for achieving interoperability while still enabling vendors to add their value added contributions into their products.

ITC/USA 2007 Conference Proceedings / The Forty-Third Annual International Telemetering Conference and Technical Exhibition / October 22-25, 2007 / Riviera Hotel & Convention Center, Las Vegas, Nevada / In support of iNET maturation, NASA-JPL has collaborated with NASA-Dryden to develop, test and demonstrate an over-the-horizon vehicle-to-ground networking capability, using Iridium as the vehicle-to-ground communications link for relaying critical vehicle telemetry. To ensure reliability concerns are met, the Space Communications Protocol Standards (SCPS) transport protocol was investigated for its performance characteristics in this environment. In particular, the SCPS-TP software performance was compared to that of the standard Transmission Control Protocol (TCP) over the Internet Protocol (IP). This paper will report on the results of this work.

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / The CCSDS SCPS FP file transfer performance is compared with that of TCP/IP FTP in a simulated satellite channel environment. The comparison is made as a function of channel bit error rate and forward/return data rates. From these simulations, we see that both protocols work well when the channel error rate is low (below 10^-6) and the SCPS FP generally performs better when the error rate is higher. We also noticed a strong effect on the SCPS FP throughput as a function of forward transmission rate when running unbalanced channel tests.

Master of Science / Department of Computing and Information Sciences / Daniel Andresen / Web services have expanded to become popular in application development. Web services technology represents an important way of communication between different applications across different platforms. Unlike traditional client/server models, such as a Web application or Web page system, Web services do not provide the user with a GUI. Instead, Web services share business logic, functionality and data through a programmatic interface across a network. Web services are services or functionalities that are exposed to the internet and serves as online or web APIs. These services which are online APIs can be called from your code and use the results in your applications to offer specific functionality to users. This project consists of two applications the client and the server application. The server application is an online REST API (Web Services developed using REpresentational State Transfer (REST) protocol) which provides all the functionalities as a service across the network that are required to develop a social networking web application. The client application is similar to any other social networking web application where you can create a profile, delete profile, send messages to your friends, post things, like and comment a post. This applications sends request to the server application using HTTP requests and get the responses. These responses are then consumed in the application to provide the required functionalities to the end user.

International Telemetering Conference Proceedings / October 28-31, 1996 / Town and Country Hotel and Convention Center, San Diego, California / The Telemetry Data Center (TDC) at White Sands Missile Range (WSMR) is now beginning to modernize its existing telemetry data processing system. Modern networking and interactive graphical displays are now being introduced. This infusion of modern technology will allow the TDC to provide our customers with enhanced data processing and display capability. The intent of this project is to outline this undertaking.

International Telemetering Conference Proceedings / October 17-20, 1994 / Town & Country Hotel and Conference Center, San Diego, California / The Distributed Interactive Simulation (DIS) concept, since its inception, has been defined into three separate but distinct areas of service. • Viewing of data in the real-time environment. • Multiple range viewing and usage of"real-time data." • Problems with the sharing of information through DIS. This paper will discuss the DIS concept and some of the various methods available to display this data to users of the system.

International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Visions of future airborne data acquisition systems include the “network in the sky” concept where a test or training participant logs on to the range network, just like today's computer users on the ground log onto the local area network (LAN). Through two-way telemetry links, the test or training participant seamlessly becomes a node in the range network. Thus, easily sharing data with event controllers and other airborne, ship-, ground-, and space-based network nodes. Such a network would allow the conduct of highly integrated test/training scenarios involving virtual and real participants without requiring physical proximity. This technology has a high payoff for the warfighter, making it a desirable objective of present and future DoD-funded development of data acquisition systems. This much-anticipated, future state-of-the-art in data acquisition will require extensive changes from today's test/training instrumentation architecture. Based on technology that is currently emerging for computer networks, this paper describes an evolutionary path for data acquisition systems to follow in order to achieve the anticipated bandwidth required for future bandwidth-intensive applications like the network in the sky. New networking paradigms, like Sun's Jini™ project, point the way to impressive usability with dramatically lower costs and network administration in the near term for ground-based networks, but they require support for just-in-time delivery of software “drivers” and other applications. These need gigabit network speeds to be viable. If this and other new networking technology is to be transferred to the test/training domain, bit rates will require two orders of magnitude improvement from today's 10-megabit range. This paper explores the technological and political telemetry issues that must be addressed before there can be a network in the sky (or anywhere else).

Research suggests that personality may dictate specific Internet behaviours or preferences. However, literature to date has been piecemeal and has tended to focus on generic use. One area that remains relatively unexplored is the influence of personality on engagement with social networking sites (SNSs). The current thesis aims to fill this gap by exploring the influence of personality on motivations for using SNSs and behavioural patterns within them. Eysenck’s EPQ-R short form (extraversion, neuroticism and psychoticism) and Beck’s SAS (sociotropy and autonomy) were used to explore personality, both globally and specifically. Phase one of the thesis employs a ‘uses and gratifications’ framework to investigate how personality may predict motivations for using SNSs. Principal component analysis identified ten distinct motivational components, which were then successfully predicted by personality variables through regression analyses. It is therefore suggested that differing personality types vary greatly in their reasoning behind SNS usage. Results support theoretical assumptions. Phase two of the research looked at Facebook behaviours and profile construction. A content analysis of participant profiles was conducted with the help of questionnaire methodology. Data analysis suggests that personality was not a particularly strong predictor of self-presentational differences in this context; although subtle differences were present. The final phase of the research explored the perceived Facebook experience of users. A thematic analysis of an online student discussion board was conducted in order to generate distinct themes surrounding Facebook outcomes. These were used within Q Methodology to generate a concourse, through which Q sort statements were derived. Results generated four shared viewpoints of the Facebook experience, which were subsequently associated with personality through the use of traditional R methods. Again, although not particularly strong, theoretically supported associations can be seen. The thesis explores personality within SNS use in a depth previously unexplored. The conclusion makes theoretically-sound assumptions surrounding personality and SNS use as a media choice.

Afin de profiter des progrès des technologies de l'information et de la communication, les infrastructures critiques se reposent de plus en plus sur des systèmes d'information complexes et se sont largement connectées à des réseaux publics, dont l'Internet. Ces interconnexions rendent les infrastructures interdépendantes et les exposent à l'ensemble des vulnérabilités des systèmes informatiques. Dans le cadre de cette thèse, nous proposons un ensemble d'outils de génération de topologies, de simulation des propagations des défaillances et de détection des pannes pour améliorer la compréhension de ces interdépendances et lutter contre les phénomènes de propagation des défaillances résultants. Le générateur de topologies proposé définit un algorithme de génération de graphes topologiques réalistes et adaptées aux études des interdépendances en générant plusieurs modèles d'infrastructure à partir d'une base commune, facilitant ainsi l'interconnexion des différents réseaux. Le simulateur des propagations des défaillances utilise les modèles épidémiologiques. Ces modèles ont été adaptés afin de prendre en compte les principaux facteurs qui influent les propagations des défaillances dans les réseaux de télécommunications comme les différents temporisateurs des protocoles de routage et la taille des tables de routage. Enfin, notre dernière contribution est la mise en œuvre d'un logiciel permettant de détecter des pannes dans un environnement hétérogène et distribué en réutilisant les outils de supervision existants. Cet outil offre des moyens pour assurer le contrôle d'accès aux informations lorsque l'environnement est constitué de plusieurs réseaux