ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, California / In this paper, we propose the exploitation of array beamforming technology in high-speed aeronautical communication applications, e.g., the integrated Network Enhanced Telemetry (iNET) system. By flexible steering of beams and nulls, an array can enhance desired signals whereas the undesired signals such as interference and jammers are suppressed. The proposed adaptive beamforming technology is DSP-based and network-aware, and is designed for the use at aerial vehicle platforms to increase transmission power efficiency, improve receiving signal sensitivity, mitigate interference/multipath effects, and extend the communication range.

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / This paper is the first of two papers that present a multipath channel model for wideband aeronautical telemetry. Channel sounding data, collected at Edwards AFB, California at both L-Band and lower S-Band, were used to generate channel model. In Part 1, analytic and geometric considerations are discussed and the frequency domain modeling technique is introduced. In Part 2, the experimental results are summarized and a channel model composed of three propagation paths is proposed.

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / This paper is the second of two papers that present a multipath channel model for wideband aeronautical telemetry. Channel sounding data were collected at Edwards AFB, California at both L-Band and lower S-Band. Frequency domain analysis techniques were used to evaluate candidate channel models. The channel model is composed of three propagation paths: a line-of-sight path, and two specular reflections. The first specular reflection is characterized by a relative amplitude of 70% to 96% of the line-of-sight amplitude and and a delay of 10 – 80 ns. This path is the result of “ground bounces” off the dry lake bed at Edwards and is a typical terrain feature at DoD test ranges located in the Western USA. The amplitude and delay of this path are defined completely by the flight path geometry. The second path is a much lower amplitude path with a longer delay. The gain of this path is well modeled as a zero-mean complex Gaussian random variable. The relative amplitude is on the order of 2% to 8% of the line-of-sight amplitude. The mean excess delay is 155 ns with an RMS delay spread of 74 ns.

In this thesis, a study of the capacity of a suggested three - dimensional Air-to-Ground cellular system is being made. The Outside Cell Interference Factor (OCIF) is being calculated through simulations for reverse and forward link using seven loops, from the interfering cells around the desired cell for different values of the maximum height of the cell and its radius. Capacity per cell as well as delay and throughput for packet data transmission was calculated for the first time through closed form equations, with the use of the load factor, the activity factor and sectoring gain using the Automatic Repeat Request (ARQ) algorithm for the correction of errors. Moreover, in this thesis, the algorithm which has been created is being analyzed and used for the simulations. Moreover, for the first time, a case study has been made involving the study of capacity of the Air – to - Ground system for the airports of Greece, in three basic scenarios in which the number of the users, the delay and the throughput per cell is being calculated. In the first scenario, we are restricting to the three major airports of the country, while in the second it expands to six airports covering from the radio-coverage side almost all Greece. In the first two scenarios the same cell radius of 175 km is being used, while in the third the radius is reduced to 100 km and the airports are increased to nineteen. In all three scenarios we assume that all the users use the same service. The voice services are also studied of 12.2 kbps and data with transmission rate 64, 128 and 384 kbps. From scenarios 1 and 2 (cell radius 175 km), it was found that we can service at the same time up to 179 voice subscribers per cell at bit rate 12.2 kbps which reduces to 33 users for video call of 64 kbps and in 18 for video call of 128 kbps. In scenario 3 (cell radius 100km),it was found that we can serve at the same time until 126 voice subscribers per cell at bit rate 12.2 kbps which reduces to 23 users for video call of the 64 kbps and in 13 for video call of 128 kbps. In scenario 3 although the capacity per cell is lower than in scenarios 1 and 2, it provides greater total capacity (for all Greece) in relation to these scenarios.

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This thesis comprises of studies based on the broad field of forensic analysis and the development of methods which can be applied to different matrices. The initial studies focus on the forensic determination of psychoactive drugs in hair matrix using newly deve1oped gas chromatography-mass spectrometry analytical methods. The second study focuses on the discrimination and matching of skid marks and rubber tyre analysis by using novel chemical analysis methods. This thesis reports the deve1opment and application of a series of innovative analytical methods: gas chromatography-mass spectrometry, inductively coupled plasma mass spectrometry, pyrolysis-gas chromatography-mass spectrometry and attenuated total reflection Fourier transform infrared spectroscopy. Gas Chromatography-Mass Spectrometric (GC-MS) methods for drug analysis routinely employ derivatising reagents. The aim of the first study was to develop a method for the analysis of two recreational drugs, delta-9-tetrahydrocannabinol (delta-9- THC) and cocaine in hair samples using GC-MS, without prior derivatisation, thus allowing the sample to be analysed in its original form. Ten hair samples, that were positive to ELISA analysis for either delta 9-THC and/or cocaine, were enzymatically digested, extracted and then analysed by gas chromatography-mass spectrometry. All samples measured contained delta 9-THC and one sample contained cocaine. The limits of detection (LOD) and quantification (LOQ) were 0.02 ng/mg & 0.05 rig/mg, respectively for cocaine and 0.015 ng/mg & 0.02 ng/mg, respectively for A9-THC. The wide detection window, ease of direct analysis by GC-MS, lower detection limits of un-derivatised samples and the stability of drugs using this technique offers an improved method of analysis. This experiment has been designed to develop an immunological screening test followed by a GC-MS confirmation method for the simultaneous analysis of delta 9- THC, THC-COOH, , OH-THC, cocaine, Benzoylecgonine (BZ), amphetamine (AP), methamphetamine (MA), in human hair, thus avoiding the significant factors responsible for drug degradation by acid and alkali hydrolysis and to obtain optimal recovery conditions. Enzymatic hair digestion was used to hydrolyse 18 Turkish samples using Proteinase K, Dithiothreitol and Tris HCl buffer. At the beginning, all 18 samples tested screened positive on ELISA, though analysis by GC-MS indicated that only 2 samples were positive for delta 9-THC and THC-COOH. Cross reaction lead to false positive results in the pre-screening step as a result of the degradation of the antibodies in the pre-coated ELISA microplate. Tyre rubber analysis Owing to an increase in the number of hit and run accidents, it is quite common for rubber traces to be left at the crime scene. The Forensic Scientist will have the task of analysing the tyre striation traces in order to identify the type of tyre involved in the accident. However, the tyre striations alone do not provide enough detail to show a high level of discrimination between different tyre manufacturers and individual models. In this study, Inductively Coupled Plasma Mass Spectrometry (ICP-MS), Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FI‘IR) and pyrolysis GC-MS methods were developed to enable greater discrimination between different tyre rubber samples. Seventy elements were screened for each sample by ICP-MS in both collision cell mode and reaction cell mode. ATR-FTIR analysis indicated a low intra-variability (analysis of similar tyres) which demonstrated high precision of the technique, and also showed a large inter-variability between different manufacturers and models, which supports their high potential as indicators to be used for discrimination between different tyres manufacturers and models. Principal Component Analysis (PCA) was utilised to distinguish between the different tyres.

A flight test program that evaluated the results of a CP140 Aurora cockpit modernization project was conducted between May 2004 and October 2005. This paper uses the results of that test program to show how basic human factors principles were violated which led to the identification of multiple design deficiencies. This paper proposes that the failure to apply good human factors principles when designing aircraft displays can lead to unacceptable deficiencies. The result can be poor modal awareness, confusion in the cockpit, and often negative training for the pilots. In particular, four major deficiencies were analyzed to determine the specific human factors principles that were breached. The violations included a lack of concise and relevant feedback to the pilot, unclear and ambiguous annunciations, poor use of colour coding principles and logic, a lack of suitable attention capture cueing, inappropriate alert cueing, an absence of aural cueing during specific degraded modes of operation, excessive cognitive workload, and a failure to incorporate the pilot as the focal point of the display design, also known as a human centred design philosophy. Recommendations for system design enhancements are provided to ensure safe and effective operations of this prototype system prior to operational implementation. The evaluation of the prototype system design was conducted by a flight test team from the Aerospace Engineering Test Establishment in Cold Lake, Alberta and supported by the Maritime Proving and Evaluation Unit in Greenwood, Nova Scotia. The test program encompassed a thorough review of system design documentation, abinitio training and preliminary testing in a Systems Integration Lab and 40 flight test missions. The recorded deficiencies were based upon the observations of two Qualified Test Pilots.

Thesis (M.Ed.)--Bowling Green State University, 2008. / Document formatted into pages; contains x, 130 p. : ill. Includes bibliographical references.

Thesis (M.S)--Ohio University, March, 2005. / Includes bibliographical references (p. 94-96)

Thesis (M.S)--Ohio University, March, 2005. / Title from PDF t.p. Includes bibliographical references (p. 94-96)