Haworth, Alvin G.

No description available.

Boice, Frank B.

No description available.

Caster, William Albert

No description available.

Deffenbaugh, Robert M.

No description available.

Baldwin, Edwin M.

No description available.

Draddy, John M.

No description available.

Koch, Joseph William.

No description available.

Brougham, William J.

CIVINS / Modern submarine production, specifically hull fabrication, consists of numerous processes with inherent variations. These variations stem from such areas as: manufacturing methods, alignment techniques and datum control, material properties, measurement methods, cutting and forming practices, and others. Each process adds a level of complexity and variation to the end product. The current method of production uses lessons and knowledge from past experience to arrive at an acceptable fi...

Whitney, William Willerson

No description available.

Geiger, Sam R.

A finite difference computer model is developed to simulate the exposure statistics of a radio frequency buoyant antenna as it is towed in a three-dimensional random seaway. The model allows the user to prescribe antenna properties (length, diameter, density, etc.), sea conditions (significant wave height, development of sea), tow angle, and tow speed. The model then simulates the antenna-sea interaction for the desired duration to collect statistics relating to antenna performance. The model pr...

Stacey, Cooper D.

The Fraser delta hosts a population of over 500,000 including the municipalities of Richmond and Delta and the Vancouver International Airport. The main arm of the Fraser River has been fixed in place by construction of a jetty focusing sediment deposition on the Sand Heads area. There is a history of submarine slide events at the delta crest which pose substantial risk to coastal infrastructure near the delta front. A submarine channel, characterized by prominent levee deposits, extends seaward...

Hosseini, Ehsan

In this thesis, the Mechanical properties of polypropylene yarn of outer protection layer on Submarine High Voltage Cable, twisted around submarine cable,is determined on various conditions at ABB Company. In the first step, tensile tests are done with polypropylene yarn specimens with and without Bitumen at Room temperature. In the second step,tensile tests are done with polypropylene yarn specimens with and without Bitumen and with knotted polypropylene yarn namely: the Fishermen’s knot, the W...

Lee, Chun-ming, 李進銘

Tolo Harbour is naturally eutrophic with frequent algal blooms in the past. Water quality of the Harbour has been improved in past 20 years but the phytoplankton density is still high compared to other waters in Hong Kong. This study aimed to quantify submarine groundwater discharge (SGD) to Tolo Harbour and to show the important role of SGD in terms of nutrient loading with ecological effect. SGD was determined by one of the natural geochemical tracers, 226Ra. Mass balance of 226Ra was appl...

Mohammed, Renas Ismael

The Taranaki Basin was formed as a consequence of multiple geologic events. From the Cretaceous period until present, it went through rifted margin, passive margin, foreland basin, and back-arc phases. A dominantly sandy unit, the Moki Formation, was deposited during the Middle Miocene within the Taranaki Basin offshore the west coast of the North Island of New Zealand. The study area covers about 1600 km2 of the southern part of the north Taranaki graben, an area covered by a 3D seismic volume....

Loveless, Alicia Maree

[Truncated abstract] It has become widely apparent throughout the world that the discharge of nitrogen contaminated groundwater is reducing surface water quality of marine coastal waters, and is subsequently contributing to the decline of benthic habitats such as seagrasses. A process-based understanding of submarine groundwater discharge (SGD) has lagged behind these impacts, and this lack of understanding is addressed by this thesis. This thesis, of the spatial and temporal complexity of SGD, ...

Van Train, William A.

The computer war game is emerging as a vital tool for finding near-optimal solutions to current military problems. A computer war game designed to permit parametric analysis of a submarine barrier is developed. Simulation techniques both mathematical and computer, are discussed. The effects of assumptions inherent in the computer war game are described. Illustrative analyses conducted through use of this computer war game are exhibited. Potential uses and methods for improvement of the developed...

Hepburn, Richard Daniel

CIVINS / U.S. Naval shipyards where submarines are dry-docked are located in regions of the United States where significant earthquakes are known to occur. The graving dry-docks at these shipyards are currently designed to withstand earthquake accelerations up to 0.26 g's. This thesis develops a nonlinear material model for wood drydock block caps which more closely represents its actual behavior than linear elastic material models used previously. Using this non-linear model, it is determined t...

Martin, Richard James.

No description available.

Cook, Robert B.

No description available.

White, James William

No description available.

Durfee, Elbert Foster, Johnson, Van Dyke

No description available.

Dooley, John Joseph

Approved for public release, distribution unlimited / No PDF currently available. / An investigation of near-bottom currents in the head of Monterey Submarine Canyon was conducted between March 1967 and May 1968. Continuous observations of water temperature, current speed and direction were obtained over periods ranging from 5 hours to 162 hours using an in situ Savonius rotor current measuring system. Basic statistical parameters and power spectra were calculated for each record. These revealed...

Schmidt, Wade H.

No description available.

Thompson, Gary C.

No description available.

Kreitler, Walter M.

No description available.

De︠ry, Francis

The stability of frontally-trapped baroclinic waves along the crest of an oceanic ridge on an f-plane is examined to determine under which conditions two neighboring, inviscid water layers, each of uniform density and momentum, can coexist without mixing by eddies associated with instabilities. A linear stability analysis for a weak disturbance is performed over a steady laminar state. The study follows that of Gawarkiewicz [1991] for a frontal system over a shelf-break, but deviates by bui...

Mirshak, Ramzi

Submarine canyons are common bathymetric features that cut into the continental shelf from the continental slope. During upwelling favourable conditions over the continental shelf, submarine canyons display enhanced upwelling, heavily impacting shelf-slope mass exchange. In this thesis, laboratory experiments were conducted to quantify how velocity, stratification and rotation affect canyon upwelling. Currents were forced by changing the rotation rate of an already rotating tank. Over time...

Nakagawa, Ryo, Hachikubo, Akihiro, Shoji, Hitoshi

Dissociation and specific heats of synthetic methane and ethane hydrates were measured under high-pressure condition by using a heat-flow type calorimeter to understand thermodynamic properties of gas hydrates under submarine/sublacustrine environments. Ice powder was put into the sample cell and pressurized by methane and ethane up to 5MPa and 2MPa, respectively. After the completion of gas hydrate formation, samples were heated from 263K to 288K at the rate of 0.01 K min-1. Large negative...

Jiang, Lin

Underwater landslides are a common source of tsunamis in coastal areas. In this thesis, three numerical models are developed to simulate the coupling of submarine landslides and the surface waves which they generate. Three different rheologies of the submarine sediments are considered: a viscous fluid, a Bingham-plastic fluid, and a Coulomb frictional material. Formulations of the dynamics are presented for the slides on a gentle uniform slope reactively coupled with the surface waves which they...

Johnsen, Ingrid Berg

Clump weights come in several shapes, with a mass generally between 2 to 9 tons [5]. With extensive oshore development in the last decades, vast networks of pipelines are installed on the sea bottom. With both pipeline extension and trawl equipment development in mind, the need for designing pipelines able to resist forces from trawl gear interaction have emerged. A recommended practice for pipeline design, DNV-RP-F111, was established by DNV. In this master thesis, a brief introduction to trawl...

Smith, Thomas Joseph.

No description available.

Zhang, Z., Shi, B., Guo, Yakun, Chen, D.

Yes / Local scour around submarine pipelines can affect the stability of the pipeline. The accurate estimation of the scour around submarine pipelines has been a hot topic of research among marine engineers. This paper presents results from a numerical study of clear-water scour depth below a submarine pipeline for a range of the steady flow conditions. The flow field around the pipeline under scour equilibrium condition is numerically simulated by solving the Reynolds-Averaged Navier-Stokes (RA...

Yang, S., Shi, B., Guo, Yakun, Yang, L.

Yes / This paper presents the results of laboratory experiments and numerical simulations to investigate the effect of different piggyback pipeline configuration on the morphology of local seabed scour subject to steady currents. Piggyback pipeline configuration investigated includes the commonly used piggyback pipeline, namely a small pipe attached on the top of large pipe and new form of piggyback pipeline proposed in this study in which a small pipe is attached to the large pipe on the upstre...

Ståhl, Emelie

Lake Orsa is situated in the county of Dalarna in central Sweden. The lake is part of the Siljan Ring, which formed approximately 380 Ma by the largest known impact in Europe. The area is of high interest due to its location during the Weichselian deglaciation. The deglacial history in the area is complex, and the behavior of the receding ice sheet is to some extent not yet fully understood. Submarine landslides were revealed during a geophysical survey, aimed as a site study for a drilling proj...

Submarine debris flows are hazards when they threaten the facilities that are built on sea floor to facilitate submarine transportation. The dynamics of submarine debris flow is simple once the debris material gets in the flow motion and that it can be represented using simple physics. A two-dimensional model with two-layer Bingham fluid representations, SDFlow2D, was developed by using an Eulerian frame of reference to predict the consequences of complex submarine debris flows. The model was vi...

Carroll, Dustin

Meltwater accumulated on the Greenland Ice Sheet drains to glacier beds, discharging into fjords hundreds of meters below sea level. The injection of meltwater at depth generates an upwelling plume that entrains warm ocean water as it rises along the terminus, increasing submarine melt and driving a fjord-scale exchange flow. However, due to sparse ocean-glacier observations, we lack a process understanding of how plumes control fjord circulation and submarine melt. Combining numerical modeling,...

Frye, Matthew C. (Matthew Clinton)

Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M. in Engineering and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2010. / Cataloged from PDF version of thesis. / Includes bibliographical references (p. 71-72). / Early stage ship design decisions continue to be a challenge for naval architects and engineers. The complex interactions between the different elements of the sh...

Hudson, Andrew G

Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1980. / Microfiche copy available in Archives and Science. / Bibliography: leaves 79-80. / by Andrew G. Hudson. / M.S.

Delaney, John Rutledge, 1941-

No description available.

Freire, Francis

Marine glacial environments contain unique seafloor features resulting from the dynamic glacial processes. Studying these submarine geomorphological features can help us understand the glacial paleo-environments so that we can predict the likely responses of present day glaciers and ice sheets to future changes in the climate. This thesis details different approaches in understanding glacial seafloor features using acoustic systems. It focuses on the novel technique of automated mapping seafloor...

Bakos, George K.

The purpose of this thesis is to assess the probability of a diesel submarine's successful attack when using bearings-only Target Motion Analysis (TMA) while approaching a surface target. Four different approach tactics are examined: POINT LEAD - POINT, POINT - LEAD - LAG, POINT - LAG - LEAD and POINT - LAG - POINT. The submarine approach problem addressed in this thesis was solved using Monte Carlo simulation. Each simulation run includes 1,000 replications for each combination of submarine spe...

Freire, Francis Fletcher

This thesis is focused on studies of glacial and slope morphology in the high Arctic of western Greenland shelf and the Molloy Hole seafloor spreading area, based on high-resolution acoustic methods and other geophysical data. The main purpose is to improve our understanding of glacial dynamics and associated processes in the marginal region of a large marine-terminating ice sheet. Newly acquired data, together with existing datasets have been compiled to create bathymetric models, which were us...

Best, Truman J.

Approved for public release; distribution is unlimited / This analysis addresses the value of a submarine base in the Arctic in relation to the growing Soviet threat in that region and the feasibility of constructing and operating such a submarine base. Location, command and control, force operation, logistic support and appropriate force size are elements of the analysis. Also included is the cost effectiveness of the Arctic submarine base both in peacetime and in wartime situations. Based upon...

Shih-Min Chou.

Thesis (M.A.)--National Taiwan University Graduate Institute of engineering science and ocean engineeting. / Includes bibliographical references.

Poremba, John E. Paterson, Eric G.,

Thesis (M.S.)--Pennsylvania State University, 2009. / Mode of access: World Wide Web. Thesis advisor: Eric G. Paterson.

Drurey, Harold Leroy

No description available.

Kline, Howard Keith

No description available.

Allen, Robert Lloyd.

No description available.

Lively, Kenneth A.

No description available.

Hamlin, James Sherrill.

No description available.