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A Study Of Beluga (Delphinapterus Leucas) Vocal Ontogeny, Audra Elizabeth Ames
A Study Of Beluga (Delphinapterus Leucas) Vocal Ontogeny, Audra Elizabeth Ames
Dissertations
There is a shortage of literature regarding beluga (Delphinapterus leucas) vocal ontogeny, as presently, there has only been one published study on the vocal development of beluga calves, despite the value of ontogenetic studies for our understanding of sound-centered species. Here I offer the second longitudinal study of beluga vocal development. Using a calibrated digital hydrophone with a sampling rate of 256 kHz, I studied the vocal progression of a male beluga calf in early life. From his first day, the calf produced broadband pulse trains with upper frequency limits extending past the study’s Nyquist frequency (128 kHz); …
Technical Reviews In Complex Development Programs, Robert M. Braunger
Technical Reviews In Complex Development Programs, Robert M. Braunger
Dissertations
Technical reviews in major complex defense and space projects are high-stakes events that technically assess programs costing up to billions of dollars, probing the work of hundreds of engineers. These technical reviews evolved since the 1960s into an industry-standard systems engineering process. Prior research argues that technical reviews at the subsystem level are the most technically important---conflicting with other work positing that mission-level technical reviews critically contribute to failures of government programs. Reviews are important, but research on reviews is inconsistent, fragmented, and lacks supporting data. To understand the practice of technical reviews and the alignment between practice and literature, …