The goals of this work were multi-faceted, consistent with the various efforts supported by this work. Particular focus was placed on predictions and analysis of the three-dimensional (3-D) propagation in the presence of 3-D environmental variations, especially shelf break canyons. Work was also performed in support of 2-D propagation in shallow water to study the impact of bottom roughness and...

The study utilises two emerging low-cost technologies, low cost Remotely Operated Vehicle (ROV) and underwater photogrammetry techniques (Structure from motion (SfM)) using off the shelf cameras, for 3D reconstruction of shallow hydrothermal vent sites around Paleochori Bay, Milos Island, Greece. Venting fields were Characterised through interactive bathymetry models produced from still images ...

The long-term objective of the GEOCLUTTER program is to understand the causes and implications of geologic clutter (reverberation) in a geologically well-characterized shallow-water environment. The original field area selected for the GEOCLUTTER program was the mid-outer continental shelf off New Jersey, USA. The New Jersey margin was chosen for the GEOCLUTTER study because the bathymetry and ...

This study examined English pronunciation by Cantonese speakers in Hong Kong with the International Phonetic Alphabet (IPA) to see how the application of IPA can be used in language education. Twenty university students, divided into two groups, one with the IPA training and the other without the training, were asked to read 30 English words (5 controls) that contain challenging sounds (e.g., l...

 to provide an objective phonetic description of vowels and diphthongs of Indian English in acoustic terms and  to provide acoustic evidence of sound change in English in language contact situation.  This of course would have implications in ESL in India, as knowledge about the vowel space and vowel qualities produced by speakers in India can help us in teaching spoken English to the student...

Methods for processing multibeam echo-sounder (MBES) bathymetry data are well established, however, there is no universal and established approach to processing and interpretation of MBES backscatter data. The aim of this paper is to (1) detail the different backscatter logging methods implemented in modern high-frequency MBES systems used primarily in shallow water; (2) describe and suggest ap...

Given the effects of steep dips and large lateral variations in seismic velocity beneath Vancouver Island continental shelf, processing travel time inversion are inadequate to obtain a detailed model subsurface. Therefore, full waveform is applied multichannel reflection data high-resolution Tofino fore-arc basin under shelf off margin. Seismic velocities obtained this study help understanding ...

i ii Abstract A model is proposed for the formation and evolution of three-dimensional sedimen-tary structures such as longshore sand ridges on the continental shelf in water deeper than that of the shoaling region. Owing to the striking similarity between the bar spacing and the length scales in which interactions among the most energetic modes of shallow water waves take place, we argue that ...

A realistic hydrodynamic model of the Texas–Louisiana shelf is configured with various simple oxygen respiration models to isolate the effects of stratification and circulation on the formation and maintenance of hypoxia. Biological activity is parameterized through various forms of respiration rather than using a complex biogeochemical model. The model domain covers the region that has histori...