A Review of Bottlenose Dolphin (Tursiops truncatus) Vocalizations and an Investigation into the Existence of Signature Whistles in a Captive Dolphin Population

Individual recognition of conspecifics is important for various reasons in both terrestrial and marine dwelling species and is carried out through a variety of modes including visual, chemical and auditory cues. The ability to recognize individuals acoustically is often carried out through the use of signature vocalizations. The production and use of signature whistles within bottlenose dolphins has been extensively tested since their existence was first suggested almost 50 years ago. From the research, two primary hypotheses have emerged: the signature whistle hypothesis and the whistle repertoire hypothesis. This work discusses the various acoustical means of individual recognition found within the animal kingdom and narrows to discuss bottlenose dolphin communication and the evidence supporting these two existing hypotheses. The results from a previously unanalyzed data set, presented within this work, support the existence of individually distinct whistle contours in captive bottlenose dolphins as well as the concept that shared whistle contours, like the upsweep style whistles, probably play an important role in communication

Strategies to ensure deep learning occurs in MBA information literacy workshops

peer-reviewedThis paper reviews various methodologies to ensure engagement by MBA students. Analyses several theoretical models and identifies the most appropriate one for this purpose. Evaluates and expands upon recent innovations developed at other business schools. Presents a case study of inventive teaching techniques employed in workshops by this author. Which focus on developing both a multifunctional and multidisciplinary approach to undertaking research. Assesses the integral role imagination and reflection play throughout the process. Explores gaming as a possible option for future instructive sessions with this group

Induction flowmeter for dielectric fluids, experimental verification final report

Experimental verification of induction flow meter for use with dielectric fluid

Editorial

Guest editor\u27s introduction to the issue

CIRCADIAN ENTRAINMENT IN MILITARY PILOTS: TRANSITIONING FROM DAY TO NIGHT FLIGHTS

This study assessed the effectiveness of light exposure in transitioning aviation schedules from days to nights. We hypothesized that a single night of light treatment will delay melatonin onset and improve performance in a simulated flight task. Study participants were military pilots who flew four simulated flights: one baseline daytime flight and three consecutive night flights. Pilots were exposed to four hours of high energy visible (HEV) light (1,000 lux) on the second night but remained in dim light on the first and third nights. Saliva samples for determining melatonin levels were collected every half hour during the three nighttime data collections. Participants also completed questionnaires to include the Bedford Workload Scale and the Karolinska Sleepiness Scale. We tracked each participant’s circadian rhythm using their melatonin onset profiles over the three nights of the study. Pilot performance in a flight simulator was assessed for each of the three data collection sessions using three flight profiles of progressing difficulty. Results showed an average delay in melatonin onset mean of 1.33 hr (SD = .36 hr). Flight performance over the testing period did not show any significant changes. This study showed that light can be used to effectively delay the onset of melatonin, potentially providing a substantive advantage to personnel who must rapidly transition to new work schedules. Further study is recommended before implementing in operational conditions.Lieutenant Commander, United States Coast GuardApproved for public release. Distribution is unlimited

So there we were-- : the stories told by chief petty officers in the United States Navy, explored through a complexity lens

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