ITC/USA 2006 Conference Proceedings / The Forty-Second Annual International Telemetering Conference and Technical Exhibition / October 23-26, 2006 / Town and Country Resort & Convention Center, San Diego, California / This paper will present methods to both measure the unmodulated carrier power of a modulated signal and to estimate the unmodulated carrier power level from the measured power spectrum. The unmodulated carrier power level is needed to convert measured spectra into units of dBc.

International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Much modem telemetry is transmitted in a digital format and to be compatible with existing range equipment the digital data is impressed on the carrier using FM modulation. The receiving system in common use employs an FM limiter/discriminator as a detector followed by an integrate and dump matched filter for bit detection. This system has been studied by previous authors [1] and it is well known that in the absence of frequency uncertainty the optimum transmission parameters consist of a modulation index of .7 (peak-to-peak deviation divided by the bit rate) and an IF filter bandwidth equal to the bit rate followed by a limiter discriminator. In many cases, there is a need for some small amount of analog telemetry transmission in addition to the digital data discussed above. In these cases it is common practice to include analog subcarriers on the main carrier with the digital data modulating the carrier at baseband, the resulting system is called PCM/FM + FM/FM. These hybrid analog/digital systems are the subject of this paper. In particular this paper addresses the performance of these systems through simulation using the Block Oriented System Simulator (BOSS) from Comdisco and with analytical techniques to obtain the BER versus SNR curves for these systems. The simulation is used over a wide range of parameters to find the optimum values of modulation index and IF bandwidth for these systems.

It is recognised that mood disorder diagnostic categories are simplifications with limited validity, and while dimensional measures may be more valid than categories, their utility is uncertain. It has been argued that the criteria for bipolar disorder (BD) are too narrow, and that a ‘bipolar spectrum’ should be recognised. The validity and utility of a dimensional measure of mania, the Mood Disorder Questionnaire (MDQ), was investigated in a cohort (n = 68) of young adults being treated for an episode of major depressive disorder (MDD). MDQ score was higher in men and correlated positively with number of depressive episodes, personality measures, and negatively with reaction time. In those on antidepressants at three month follow up (n = 36), MDQ correlated moderately with restlessness (r = .39, p = .01) and suicidal thoughts (r = .34, p = .02). A genetic study of MDD, BD and categorically defined bipolar spectrum disorder (BSD) found an association with a single nucleotide polymorphism (rs1202874) in GPR50, on Xq28. When BD and BSD groups were combined, the association strengthened (p = .0014; OR 1.97, 95% CI 1.26-3.06). The MDQ was investigated in a sample (n=2942), from the population-based Generation Scotland biobank. The MDQ showed high internal reliability, and in a subset with MDD (n=620), a three component structure. MDQ was higher in men, and in those with recurrent depression, and correlated negatively with age of onset (r = -.191, p = 2 x 10-6). A trimodal distribution of age-of-onset was observed in those with chronic or highly recurrent MDD. Controlling for age, gender and current distress, MDQ correlated negatively with general intelligence (r = -.100, p = 1 x 10-8) in controls. Overall there was reasonable evidence that the MDQ had antecedent, concurrent and predictive validity. There was less evidence to support the reliability or validity of BSD. The findings suggested that in those with MDD (particularly with risk factors such as male gender, early age of onset and recurrence) the MDQ may be useful to (1) identify those who may require more intensive monitoring and (2) inform treatment decisions. Thirdly, classifying mood disorders on the basis of prior course, and including dimensional measures, may be more clinically useful.

No description available.

International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California / According to the advantages of chaotic analog sequences and chaotic binary sequences, this paper proposes a method generating chaotic binary spread-spectrum sequence by multilevel quantifying. This paper proved that even correlation and odd correlation between such sequences of length N are all Gaussian distributed with mean 0 and variance N, the even of mean-square cross-correlation is N, and the variance of mean-square cross-correlation is 2N. The method can increase the number of chaotic sequences, made the spread-spectrum system more secure. The theoretical analyses and the results of simulation show that the performance of such sequence general is as same as traditional spread-spectrum sequence, its number is very large, and can be used in CDMA in future.

ITC/USA 2011 Conference Proceedings / The Forty-Seventh Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2011 / Bally's Las Vegas, Las Vegas, Nevada / With the increasing demand on available frequencies used for Telemetry transmission, it is important for the test ranges to be good stewards of the spectrum. One method is a new use of Best Source Selection. This method consists of placing data-quality encapsulators at the output of each of the TM receivers used. This system works without the need to use pattern detect which allows for the use of Best Source Selection without the need for decrypting the data. In conjunction with new system architecture, this setup is how the Atlantic Test Range is using best source selection in the future.

published_or_final_version / Botany / Doctoral / Doctor of Philosophy

published_or_final_version / abstract / toc / Physics / Master / Master of Philosophy

published_or_final_version / Physics / Master / Master of Philosophy

In this study, a promising new intervention implemented for adults with aphasia due to stroke, Multimodal Communication Treatment, was modified for its use with one child with autism spectrum disorder to identify if the child could learn and communicate new words through learning multiple modalities. Data was collected on the child’s communicative output as well to assess the frequency and types of his communication attempts. The child presented with challenging behaviors throughout the intervention period, and its potential impact on the execution of the intervention was studied. The study found that Multimodal Communication Treatment was not an effective intervention approach for this child. The majority of his output was not communicative in nature and challenging behaviors impacted the effectiveness of implementing the approach. Further research is needed to identify whether Multimodal Communication Treatment could be an effective intervention for children with more communicative intent and increased attention. / text