Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 53 for “"Scuba"”.
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Immersive scuba diving simulator using virtual reality
We present Amphibian, a simulator to experience scuba diving virtually in a terrestrial setting. Amphibian is novel because it simulates a wider variety of sensations experienced underwater compared with to existing diving simulators that mostly focus on visual and aural displays. Users rest their …
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The hearing abilities and middle ear functioning of the recreational scuba diver
Scuba diving as a recreational activity has increased in popularity over the past few years. It is believed that repeated exposure to the hyperbaric environment may have a long term effect on the auditory system. The research literature has given a lot of attention to acute injury but is very …
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Impacts of SCUBA divers in the Silfra groundwater fissure : ecological disturbance and management
As is common with increasing tourism the world over, the rapid growth of the Icelandic tourism industry may negatively impact ecosystems in areas that tourists visit. The Silfra groundwater fissure in the Thingvellir National Park has seen a rapid increase in the number of entrees, receiving just …
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Automated open circuit scuba diver detection with low cost passive sonar and machine learning
This thesis evaluates automated open-circuit scuba diver detection using low-cost passive sonar and machine learning. Previous automated passive sonar scuba diver detection systems required matching the frequency of diver breathing transients to that of an assumed diver breathing frequency. Earlier …
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Automated open circuit scuba diver detection with low cost passive sonar and machine learning
This thesis evaluates automated open-circuit scuba diver detection using low-cost passive sonar and machine learning. Previous automated passive sonar scuba diver detection systems required matching the frequency of diver breathing transients to that of an assumed diver breathing frequency. Earlier …
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Spiritual experiences and environmentalism of recreational users in the marine environment: New Zealand surfers and scuba divers
… spirituality to be a dimension of surfing and scuba diving has received far less scientific attention. Surfing and scuba diving are the focus of this research as a means to inform future policy decisions and research on spiritual connections to the marine environment. This study used …
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Submillimetre Studies of Pre-stellar and Starless Cores in the Ophiuchus, Taurus and Cepheus Molecular Clouds
… Cepheus molecular clouds. We identify sources in SCUBA-2 850-μm emission, and determine temperatures by fitting a modified blackbody model to their spectral energy distributions, measured using SCUBA-2, PACS and SPIRE data. We construct convolution kernels to accurately bring SCUBA-2 and Herschel …
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Understanding Seahorse Distribution and Ecology in Malta through Citizen Science
… encountered by the public (particularly by scuba divers) in Maltese waters and as Malta is considered a centre for recreational Scuba diving in Europe, it was deemed a good candidate for a sub-aquatic citizen science initiative. In this study, citizen science approaches were compared to …
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An Economic Analysis of Using Retired Vessels to Create Artificial Reefs in Costa Rica
… was to calculate the number of anglers and/or scuba divers that need to visit Costa Rica in order to break-even on the costs of creating an artificial reef by sinking retired naval vessels, approximately $8.6 million. The analysis assumed that all funding to convert the costs of developing the …
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Evaluation of two reef materials and point or cove locations for construction of artificial reefs in Smith Mountain Lake, Virginia
… selected for study. The sites were chosen from SCUBA and fathometer survey data on the basis of uniformity of water depth, substrate type, amount of submerged cover, and bottom topography. Four reefs were constructed of scrap automobile tires and four were made of discarded Christmas trees. The …
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Use of American Sign Language for Underwater Communication
… of this study was to determine if beginning SCUBA divers with the use of sign language would reveal less anxiety and more self confidence, perform underwater tasks faster and perceive themselves safer and enjoying diving more because of their use of signs than two control groups without the …
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Taxonomy, systematics and biogeography of South African actiniaria and corallimorpharia
… literature. Photographic records submitted by SCUBA divers, and specimens collected during the course of this study provided more recent data.
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Ecoturismo Subacuático. Aplicación al Caso Particular de la Evaluación de un Sendero Submarino en las Costas de Maitencillo, V Región, Valparaíso, Chile.
… present thesis is based on the implementation of scuba diving activities in the year 2002, in the local fishing cove of Maitencillo, Fifth region, Chile. The local fishermen manage the exploitation process of a type of protected marine area called benthic resource management and exploitation area …
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Hydrodynamics of magnet-coil actuated robotic fish
… robotic fish for swarm robotics experiments, Scuba Fish. Both of these robotic fish use a magnet-coil actuation method in order to create caudal fin motion. A velocity imaging technique,, Particle Image Velocimetry (PIV), was used in order to characterize the wake structure created by the tail …
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Troubled waters : the battle over shipwrecks, treasure and history at the bottom of the sea
… historians and cultural managers) and hobbyist SCUBA divers.
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Comparison of two methods for sampling invertebrates on submerged vertical walls with diving
… submerged vertical areas and bottoms while scuba diving were made in Silfra, a freshwater fissure in Þingvellir National Park, southwest Iceland. A modified Surber sampler and a constructed manual suction pump sampling system were used to take 20 samples at two depths at a chosen transect in …
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The ecology and distribution of rockboring pelecypods off Del Monte Beach, Monterey, California
Divers using SCUBA gear gathered and identified rockboring pelecypods found in the subtidal outcrops of Monterey silicious shale off Del Monte Beach, Monterey, California. Underwater photographs were taken of all the recognizable species present. A species distribution and mapping survey was made. …
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Parasite assemblages of three endemic catshark species from the west and south coasts of South Africa
… 105 cm respectively. Sharks were collected by SCUBA divers and rod and line fishing from four sites between Saldanha Bay and De Hoop Nature Reserve. Parasites from the skin, gills, body cavity, spleen, stomach and intestine were counted, removed, and fixed as appropriate.
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