Dissertations / Theses: 'Ships'

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Sarch, Martin G. "Fin stabilizers as maneuver control surfaces." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FSarch.pdf.

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Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, December 2003.
Thesis advisor(s): Fotis A. Papoulias, Charles N. Calvano. Includes bibliographical references (p. 111-112). Also available online.

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Bassham, Bobby A. "An evaluation of electric motors for ship propulsion." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FBassham.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, June 2003.
Thesis advisor(s): Robert Ashton, Todd Weatherford. Includes bibliographical references (p. 93-96). Also available online.

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Kumar, Ramesh. "Defense of surface ships against anti ship missiles." Thesis, Monterey, California. Naval Postgraduate School, 1990. http://hdl.handle.net/10945/28092.

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This thesis discusses the Anti-Ship Missile problem and explores the various options available for countering the Anti-Ship Missile. Special emphasis has been given to the chaff solution for defeating the Anti-Ship Missile. A program has been written to enable the testing of the effectiveness of the medium range and close range chaff deployed in conjunction with various conditions of wind and various ship's courses. The program can be used to determine the best solution for deploying the medium range chaff given the known parameters such as detection ranges and probable wind conditions. The program was run with medium range chaff deployed in the default position and the wind's course was varied through 180 degrees. For each of the courses of the wind 3 wind speeds were tried. The ship's course was also varied through 360 degrees for each of the winds courses in 45 degree steps. The seduction chaff was automatically deployed by the program

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Kamur, Ramesh. "Defense of surface ships against anti ship missiles /." Monterey, California : Naval Postgraduate School, 1990. http://edocs.nps.edu/npspubs/scholarly/theses/1990/Sep/09Sep%5FKumar.pdf.

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Thesis (M.S. in Systems Engineering (Electronic Warfare))--Naval Postgraduate School, September 1990.
Thesis Advisor(s): Milne, Edmund A. Second Reader: Cooper, Alfred W. M. "September 1990." Description based on title screen as viewed on March 18, 2010. Author(s) subject terms: Anti-Ship Missiles, Seduction mode, Distraction mode, Soft kill, Hard kill. Includes bibliographical references (p. 110).

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Yeung, Tat-chuen. "The Hong Kong shipping register : past, present and future /." [Hong Kong] : University of Hong Kong, 1994. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13762217.

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Souhan, Brian E. "Closed loop control of a cascaded multi-level converter to minimize harmonic distortion." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Jun%5FSouhan.pdf.

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Colgary, Katherine A. Willett Devon K. "Ship and installation program optimal stationing of Naval ships /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Jun%5FColgary.pdf.

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Thesis (M.S. in Applied Science (Operations Research))--Naval Postgraduate School, June 2006.
Thesis Advisor(s): Robert F. Dell and William J. Tarantino. "June 2006." Includes bibliographical references (p. 47-48). Also available in print.

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Daqaq, Mohammed F. "Virtual Reality Simulation of Ships and Ship-Mounted Cranes." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/32305.

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We present a virtual simulation of ships and ship-mounted cranes. The simulation is carried out in a Cave Automated Virtual Environment (CAVE). This simulation serves as a platform to study the dynamics of ships and ship-mounted cranes under dynamic sea environments and as a training platform for ship-mounted crane operators. A model of the (Auxiliary Crane Ship) T-ACS 4-6 was built, converted into an OpenGL C++ API, and then ported into the CAVE using DiverseGL (DGL). A six-degrees-of-freedom motion base was used to simulate the actual motion of the ship. The equations of motion of the ship are solved using the Large Amplitude Motion Program (LAMP), while the equations of motion of the crane payload are numerically integrated; the interaction between the payload and the ship is taken into consideration. A nonlinear delayed-position feedback-control system is applied to the crane and the resulting simulation is used to compare the controlled and uncontrolled pendulations of the cargo. Our simulator showed a great deal of realism and was used to simulate different ship-motion and cargo transfer scenarios. This work received support from the Office of Naval Research under Grant No. N00014-99-1-0562.
Master of Science

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Willett, Devon K. "Ship and installation program optimal stationing of Naval ships." Thesis, Monterey California. Naval Postgraduate School, 2006. http://hdl.handle.net/10945/2768.

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.2 billion in savings. We also investigate the influence of using two different measures of pier capacity and incorporate 30 new ships and submarines to demonstrate SHIP's ability to station the proposed future force structure.
US Navy (USN) author.

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Rollings, Sarah E. "Seakeeping analysis of small displacement high-speed vessels." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FRollings.pdf.

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Assenai, Tagiadin, and Bröte Oscar Hendey. "Energy Sail Ships." Thesis, KTH, Energiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277794.

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Oceans offer a vast supply of energy through ever-present winds and currents. Offshore wind energy alone could provide many times the current global energy demand. One concept approach that aims to tap into these reserves are energy sail ship, wind powered vessel that take advantage of oceanic energy to produce and store harvested energy. This report studies the different systems involved in designing an energy sail ship; finding suitable waters to operate, shell vessel design, wind propulsion method, electricity generation, and hydrogen production and storage.Suitable operating waters are identified as having strong prevailing winds and currents, as well as proximity to land. One particularly suitable example of this is the southern coast of New Zealand, which is studied in this report. Catamarans are identified for use as energy sail ship design, as they offer low water resistance as well as large surface areas needed to place systems. Three methods of ship propulsion are considered; Flettner rotors, Parawings and Wing sails. A method of effective and reliable saltwater electrolysis is identified, with cells that last thousands of hours without maintenance. Finally, hydrogen storage methods are evaluated, including chemical conversion into methanol or ammonium, as well as compressed hydrogen storage.A simplified energy analysis is preformed to determine an approximate energy efficiency of a theorized ESS that utilizes proposed technologies. The energy sail ship was found to produce roughly 2.5 GWh.
Havet innehåller stora mängder energi från både vindar och strömmar. Endast energi från kustnära vindar uppskattas vara tillräckligt för att täcka världens årliga energibehov. Ett koncept som avser att ta till vara på havets energi är vinddrivna och vätgasproducerande skepp (engelska: energy sail ships).I denna rapport studeras de olika system och teknologier som bygger upp en energy sail ship,så som lämpliga vattenområden, skeppsdesign, vinddrivningsmetod, elgenereringsmetod, vätgasproduktion och energilagring.Områden med konstanta och starka vindar, i kombination med starka havsströmmar, identifieras. Nya Zeelands södra kust är ett särskilt lämpligt område som studeras närmare i denna rapport. Katamarandesign föreslås som skeppsdesign för dess låga vattenmotstånd samt att de erbjuder det stora ytområde som behövs för vätgasproduktion och lagring. Tre metoder för vinddrivning identifieras; Flettnerrotorer, fasta segel samt skärmsegel. Energieffektiva och underhållsfria elektrolysceller föreslås för saltvattenselektrolys. Dessa celler har en livslängd på tusentals timmar istället för endast några få timmar för celler som inte är anpassade för saltvatten. Till slut utvärderas vätgaslagring i form av metanol, ammonium eller komprimerad vätgas.En enklare energianalys utförs för att bestämma energieffektiviteten av en energy sail ship som använder de föreslagna teknologierna. Detta skepp får en approximativ årlig energiproduktion på 2,5 GWh.

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Harpster, Matthew Benjamin. "A re-assembly and reconstruction of the 9th-century AD vessel wrecked off the coast of Bozburun, Turkey." Diss., Texas A&M University, 2005. http://hdl.handle.net/1969.1/2695.

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In 1973, researchers from the Institute of Nautical Archaeology (INA) were led to the site of a wrecked ship by sponge diver Mehmet A??k??n, near his hometown of Bozburun, Turkey. During further monitoring over the following 21 years by INA, the site was identified as a merchant vessel dating from the 9th century AD. The excavation of the site by INA researchers and students from Texas A&M University occurred over four summer seasons, from 1995 to 1998, and yielded approximately 900 whole or nearly-whole amphorae, personal items, palynological material, and approximately 35 percent of the vessel??s wooden hull. This dissertation is a record of the curation, cataloging, analysis and re-assembly of the preserved elements of the Bozburun vessel??s hull, as well as a theoretical reconstruction of the entire vessel. The Bozburun vessel is unique as it is the only fully-excavated shipwreck from the 9th century AD, and is, indeed, a valuable source of examples of ship construction in the Mediterranean between the 7th and the 11th centuries AD. This dissertation, after discussing the methods of excavation and cataloging methods, posits the hypothesis that the techniques used to build this vessel represent a transitional stage in shipbuilding technology, combining distinctly old and new techniques. While the builders used embedded edge joinery in the ship??s planking, a very old method, they also appear to have used a conceptual framework and standards to design the vessel as well; methods evident in modified forms in Italian shipbuilding treatises from the Renaissance.

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Kreider, Marc Alan. "A numerical investigation of the global stability of ship roll : invariant manifolds, Melnikov's method, and transient basins /." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-03142009-040740/.

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Drake, Roy. "Cost benefit analysis of pier refueling versus barge refueling at the Fleet Industrial Supply Center /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FDrake.pdf.

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Thesis (M.B.A.)--Naval Postgraduate School, June 2003.
"MBA professional report."--Cover. Thesis advisor(s): Raymond Franck, Donald Eaton. Includes bibliographical references (p. 41). Also available online.

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Miyashita, Hiroaki. "Ancient ships of Japan." Texas A&M University, 2006. http://hdl.handle.net/1969.1/4415.

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Ancient ships of Japan, which are little known outside of Japan, are presented based on the studies of past researchers, as well as a comprehensive analysis of archaeological remains. The process of development from logboats to extended logboats or semibuilt-up ships, and finally to built-up ships is traced. This study covers evidence from the Early Jomon period (4000 - 3000 B.C.E.) through the Kofun period (300 - 700 C.E.). A large number of logboat remains date to the Jomon period, and it is these logboats which become the foundation of later Japanese ships. The number of ship remains from the Yayoi period diminishes. Therefore, iconographic evidence, mainly clay ship figures and drawings, are used in order to reconstruct the ships from that time. This thesis is an account of what is presently known about the ancient watercraft of Japan, based on the existing ethnographic literature, the archaeological record, and iconographic sources.

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Lawrence, David Peter. "Skills analysis aboard ships." Thesis, University of Plymouth, 1988. http://hdl.handle.net/10026.1/1717.

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Zirilli, Antonio. "Intelligent autopilots for ships." Thesis, University of South Wales, 2000. https://pure.southwales.ac.uk/en/studentthesis/intelligent-autopilots-for-ships(0cff80b7-e1b9-4c05-ac2f-06c15f714584).html.

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The design of automatic systems for steering a ship presents difficult challenges because of their dynamic properties which vary considerably within the range of sailing conditions. Automatic steering of ships has its origin at the beginning of the century and was prompted by the introduction of the gyrocompass. Until the earlier 70s almost all autopilots for a ship were based on the proportional-derivative-integral (PID) controller. The main disadvantage with PID controllers is that the optimal parameters setting can be achieved only for a particular sailing condition. This shortcoming was and is still dealt with in the framework of adaptive theory where the controller parameters are adjusted in the attempt to seek the optimum of a pre-set performance function. Despite such a potential advantage, at present adaptive control theory is limited to linear plants and requires a certain amount of a-priori information for a successful application. This thesis is concerned with the applicability of intelligent control techniques to the problem of designing course-keeping and course-changing autopilots for ships. For this reason the framework of intelligent control theory is introduced and a pragmatic definition of intelligent controllers is stated. The learning and adaptive features of neural networks and fuzzy logic systems are exploited and used to solve advantageously the control design problem. Adaptive networks are used as a unifying structure where different kinds of neural networks and fuzzy logic paradigms can be described. In this framework, comparisons between neural networks and fuzzy logic systems are made and results from one field can be easily extended to the other. Although the use of such systems for the design of autopilots is in its early stage, the majority of the contributions which have appeared in literature have focused on the use of feedforward networks trained with the back-propagation algorithm. The main contributions of this thesis are the critical analysis of the feedforward network controller trained with the back-propagation algorithm, the proposition of an alternative controller architecture based on the use of radial basis function networks and to give conditions under which the stability analysis of the intelligent controllers so designed can be evaluated.

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Sadat, Hosseini Seyed Hamid Stern Frederick Carrica Pablo M. "CFD prediction of ship capsize parametric rolling, broaching, surf-riding, and periodic motions /." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/427.

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Manhertz, Carey M. "Cashless ships : a feasiblity study." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA333458.

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Thesis (M.S. in Information Technology Management) Naval Postgraduate School, Sept. 1997.
Thesis advisors, Suresh Sridhar, Rex Buddenberg. ADA333458. Includes bibliographical references (p. 51-52). Also available online.

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Røed, Bjarte Knappen. "Designing for High-Speed Ships." Doctoral thesis, Norwegian University of Science and Technology, Department of Product Design, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1580.

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Fast patrol boats are high-speed vessels operated by the Royal Norwegian Navy (RNoN). These ships are 36,5 meters long, have a beam of 6,2 meters and operate at high speed (32 knots – 16,5 meters per second) in very restricted waters. The fast patrol boats are war ships and navigation tasks performed by the crews are different from those in civilian high-speed craft. A team of five persons navigate the fast patrol boats, and navigation is based on traditional means such as visual observations and paper charts. The person leading the team is the navigator.

The ships were built in the late 1970s and upgraded in 2001 when new navigation equipment was installed. However, the crews criticized the modern navigation equipment for being complex and difficult to use. In 2002, an upgraded fast patrol boat collided with a rock during high-speed navigation. The accident resulted only in material damage. Following this accident the RNoN acknowledged the need to gather knowledge about human factors and design of navigation equipment.

Navigating a fast patrol boat is about operating a complex sociotechnical system. Strong demands are put on both people and their tools. In order to design usable navigation equipment for these ships, one has to have knowledge about the ships’ task, the crew that carry out the navigation, and the contexts in which navigation takes place. To gather such knowledge, this study observed several navigation teams at work and used different approaches to structure and describe the work of navigation teams.

A hierarchical task analysis was conducted in order to describe navigation in accordance with procedures and established best practices. The assignment navigate to destination was the highest level of the navigator’s work. The assignment included the navigation tasks; plan, start, monitor, change course, and arrive. For each navigation task, a detailed analysis was conducted. It was found that the crews used work practices that emphasize efficiency rather than accuracy in e.g. position fixing. Although efficiency was given priority, the navigation teams controlled system variation in order to keep the ship within safe waters.

A usability study was conducted. This study treated navigation equipment that had been fitted when the ship was upgraded. A cognitive walkthrough was conducted in order to evaluate whether human factors guidelines were applied in the design of the modern navigation equipment. In total 30 usability findings were described. The study suggested that navigation equipment to little extent were user-centered. The navigation teams compensated for lack of usability by expanding actions and by modifying the equipment.

The framework of distributed cognition was used to describe the observed work of the navigation teams. Distributed cognition suggests that cognitive processes are not bounded by the individual person, but are distributed between humans and the physical artifacts they use. Humans and artifacts that participate in goal directed processes are said to be in a functional relationship. Within the functional relationships information trajectories describe how information is gathered, shared and used. Functional relationships are not static but can configure depending on the context. In studies of distributed cognitive processes, investigating physical representations are important as these are outside the head of the people, yet within the cognitive system.

The navigation team and their artifacts were described as one cognitive system where the crew and their tools were functionally related. Navigation was in most cases founded on a detailed plan. The navigator drew lines and symbols in nautical paper charts in order to represent the plan. The navigation plan was a resource for the teams’ actions and the charts were a frame of reference for the teamwork on the bridge. The crew enriched their tools in order to improve communication and information retrieving. For instance, information important to navigation was to large extent noted in the chart. Another example was equipping the bearing device with small pins in order to feel the direction of the device. Artifacts were also used to support the navigators’ memory. Pointing the bearing device in the direction of the upcoming course meant that the navigator did not have to remember the sailing direction. The dynamic properties of the system did on the one hand provide barriers towards erroneous actions. The crewmembers monitored each other’s tasks and corrected mistakes when necessary. On the other hand, when the functional relationship was not held together, the result was entropy.

The framework of activity theory was used to provide further descriptions of the navigation teams’ work. Activity theory focuses on people working in a context. In this study, activity was regarded as situated actions taking place in shorter time frames. Activity theory claims that the elements of the activity encompass the persons and their use of tools towards a conscious goal. Further, the goals of the activity are influenced by the outcome of the activity and by specific constraints.

Activity theory describes the structure of navigation at different levels. The basic constraints that influenced the navigation teams were related to the space available to maneuver the ship, and to the conditions for making visual observations. Crewmembers’ behavior was not constant, but directed towards different motives depending on the circumstances. The crew usually carried out goal related tasks. However, in some cases the crew directed their work towards the operations of equipment or towards solving problems. The framework of activity theory described how internal and external factors influenced the focus of the teams’ work.

Both distributed cognition and activity theory findings suggested that the teams frequently used artifacts for purposes beyond their initial scope of design. For instance, bearing devices were used to augment navigators’ memory.

Based on the knowledge gathered from task analysis, the usability study, and from the frameworks of distributed cognition and activity theory, a design study was carried out. Four prototypes were produced in order to explore possible design solutions that could improve the thinking and cooperation for the navigation teams. The prototypes included an automatic steering system, an electronic chart, alarm panels, and audio alarms. The prototypes emphasized the use of physical representations and perceptually rich interfaces. The interfaces used for instance sound, vision, and tacitle feedback.

Applying human factors principles in design suggested several design solutions that possibly could improve navigators’ working conditions. However, there is a risk that new design will create opportunities for new types of failures. For this reasons, user evaluations were suggested as a necessary part of design development. However, user evaluation was outside the scope of this study.

This study suggested two outcomes of a design processes. One outcome is the improvement of the design in question. The second outcome is the design seeds, that is concepts and techniques that can be reused in other development settings.

Development on navigation technology is at present an industry with strong engineering influence and traditions. This study suggested that a user-centered approach should involve engineers and work through the engineers’ domain. It was suggested that a design process for development of navigation equipment would benefit from being multidisciplinary, iterative and utilize user evaluation.

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Øien, Henrik Aksel. "Energy efficient operation of ships." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16232.

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By reducing ships’ fuel consumption, shipowners can achieve lower operating costs while at the same time reducing their impact on the environment. This report is a study of different measures that can be taken in order to improve ships’ energy efficiency, and a study of how various engine parameters can be related to efficient running of the engine. Several measures have been assessed and related to a specific ship’s energy profile in order to find the fuel and diesel oil savings potential. The ship’s profile has been updated largely based on the different manufacturers’ own estimations of their product’s effect on fuel consumption. Engine data for a two-stroke diesel engine have been collected from a database and are presented compared to the overall efficiency of the engine. The parameters are presented with the goal of identifying which ones, if any, that most accurately indicate the condition of the engine in terms of efficiency.

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Prince, Martyn Paul. "Stabilising ships for helicopter operations." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342777.

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Fogg, Jeth Al. "Cruise Ships Port Planning Factors." FIU Digital Commons, 2001. http://digitalcommons.fiu.edu/etd/3502.

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Sen, Sharma Pradeep Kumar. "Sensitivity analysis of ship longitudinal strength." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/45183.

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The present work addresses the usefulness of a simple and efficient computer program (ULTSTR) for a sensitivity analysis of ship longitudinal strength, where this program was originally developed for calculating the collapse moment. Since the program is efficient it can be used to obtain ultimate strength variability for various values of parameters which affects the longitudinal strength, viz., yield. stress, Young's modulus, thickness, initial imperfections, breadth, depth, etc. The results obtained with this approach are in good agreement with those obtained by use of a more complex nonlinear finite element program USAS, developed by American Bureau of Shipping.
Master of Science

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Sullivan, Brett M. "Determination of cost drivers for Ship Operations (1B1B) consumable (SO) operations target accounts for Amphibious Assault ships." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://edocs.nps.edu/npspubs/scholarly/theses/2008/Dec/08Dec%5FSullivanB.pdf.

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Thesis (M.S. in Operations Research)--Naval Postgraduate School, December 2008.
Thesis Advisor(s): Nussbaum, Daniel A. "December 2008." Description based on title screen as viewed on February 2, 2009. Includes bibliographical references (p. 77). Also available in print.

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Vidoni, Tullio. "Medieval seamanship under sail." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26936.

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Voyages of discovery could not be entertained until the advent of three-masted ships. Single-sailed ships were effective for voyages of short duration, undertaken with favourable winds. Ships with two masts could make long coastal voyages in the summer. Both these types had more or less severe limitations to sailing to windward. To sail any ship successfully in this mode it is necessary to be able to balance the sail plan accurately. This method of keeping course could not reach its full development until more than two sails were available for manipulation. Rudders never were adequate to hold ships to windward courses. Ships with three or more masts could be sailed in all weather with very little dependence on the power of the rudder and the freedom from this limitation made it possible to build ships large enough to carry sizable crews, their stores and spare gear over ocean crossings.
Arts, Faculty of
History, Department of
Graduate

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Taousakis, Michael. "Development and implementation of zone logic concepts on shipbuilding modernization." Master's thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03302010-020209/.

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Kurultay, Aziz Alper. "Sensitivity analysis of the seakeeping behavior of trimaran ships." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Dec%5FKurultay.pdf.

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Lange, Isabelle. "Ship to shore : Mercy Ships, healing and faith along the southern West African coast." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2016. http://researchonline.lshtm.ac.uk/2548625/.

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In Benin in mid 2004, radio stations began announcing the forthcoming arrival of a Christian hospital ship. It was going to dock in the country’s main port in Cotonou and provide free surgeries for hundreds of people over a period of four months. Presenting the first ethnographic account of Mercy Ships, this dissertation provides a lens for reflecting on the ever-growing number of faith-based organisations in West Africa. This dissertation addresses the following questions: does sought-out contact with the services and environment of this hospital ship change people – both patients and crewmembers – and the way they live, think about and understand their lives? In those circumstances when changes occur, how do they come about? By addressing these questions, this dissertation contributes to a body of work in the anthropology of faith, healing, medical humanitarianism and international development. It not only explores the personal value and meaning for people volunteering with and treated by this faith-based organisation, but it also explores how the hospital ship is enacted and experienced, and how, perhaps surprisingly, it is both the lives of the crewmembers as well as the patients that are changed, as they project their faith and visions of lives well lived onto their ship experience. The promise of the ship as a catalyst for change in the imaginations of crew and patients; the blend of medical and social care on board; the perseverance through physical and emotional challenges; and the separation of the ship from land all blend to create powerful encounters that shape their experiences. These encounters demonstrate how the act of faith can become a form of healing, and likewise, how healing can create and strengthen faith. Throughout their journeys, patients and volunteers grapple with their faith which is intimately intertwined with their physical, social and spiritual well-being.

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Yoon, Hyunse Stern Frederick Longo Joseph. "Phase-averaged stereo-PIV flow field and force/moment/motion measurements for surface combatant in PMM maneuvers." [Iowa City, Iowa] : University of Iowa, 2009. http://ir.uiowa.edu/etd/453.

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Blyden, Gregory D. "Modeling ship air conditioning maintenance costs using the Integrated Condition Assessment System (ICAS)." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2002. http://library.nps.navy.mil/uhtbin/hyperion-image/02Dec%5FBlyden.pdf.

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Gunter, Robert Lee. "Life cycle cost approach for evaluation of alternative submarine programs." Master's thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-02162010-020216/.

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Allievi, Alejandro. "Experimental and numerical analysis of a fishing vessel motions and stability in a longitudinal seaway." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26680.

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Motions and stability of a typical B.C. fishing vessel were experimentally and numerically investigated in a longitudinal seaway condition. The experimental model was self-propelled, radio-controlled and equipped with an on-board data acquisition system. Pitch, roll, yaw, surge, and heave responses to regular waves of predetermined frequencies and amplitudes generated along a 220-ft model basin were obtained. Different displacement conditions and GM configurations were tested. The numerical model for the dynamic analysis of the fishing vessel motions has been implemented using strip theory. A computer program was developed to study the nonlinear motions of the vessel. The velocity dependent coupling terms, responsible for a major part of the nonlinear behavior, were included. A time dependent component analysis of the roll damping has been performed. Regular linear and nonlinear waves were used. A parametric study of the fishing vessel stability has been carried out by considering its dynamic response in waves of varying characteristics. Unstable behaviour was found to be closely related to waves of length of similar magnitude to the ship length. The effects of wave amplitude and rudder usage were found to be of capital importance in the capsizing process. Experimental and numerical results showed good agreement.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate

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Glenwright, David George. "An experimental and finite element investigation of added mass effects on ship structures." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26701.

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The Experimental and Finite Element Investigation of Added Mass Effects on Ship Structures comprised three phases : 1) investigation of the fluid modelling capabilities of the Finite Element Program VAST, 2) experimental investigation to determine the effect of the fluid on the lowest natural frequencies and mode shapes of a ship model, and 3) comparison of these experimental results with numerical results obtained from VAST. The fluid modelling capabilities of VAST were compared with experimental results for submerged vibrating plates, and the effect of fluid element type and mesh discretization was considered. In general, VAST was able to accurately predict the frequency changes caused by the presence of the fluid. Experimental work both in air and water was performed on a ship model. The lowest four modes of vertical, horizontal, and torsional vibration were identified, and the effect of draught on the frequencies and mode shapes was recorded. When the experimentally obtained frequencies and mode shapes for the ship model were compared with the numerical predictions of VAST, good agreement was found in both air and water tests for the vertical vibration modes.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate

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35

Jensen, Kenn. "Documentation and analysis of ancient ships." Copenhagen : Technical University of Denmark, 1999. http://www.mt.mek.dtu.dk/reports/PHDthesis/pdf/kj.pdf.

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36

Perez, Villalonga Francisco J. "Dynamic escape routes for Naval ships." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FPerez%5FVillalonga.pdf.

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Veksler, Aleksander Vladimirovitsj. "In-transit cargo transfer between ships." Thesis, Norwegian University of Science and Technology, Department of Engineering Cybernetics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8964.

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Cargo transfer between two vessels at sea requires the ramp connection between the vessels to be as stable as possible. The complex nature of the system makes employing control methods difficult. This thesis explores two ideas for improving performance of the interconnected system. First idea examines the possibility of actuating the smaller of the vessels with fins, so as to reduce the relative movement between the two points where the ramp is connected to the ships. The second idea using the larger ship to shield the smaller one from incoming waves. It is assumed that the total disturbance is minimized at a certain angle to the waves, and an Extremum-Seeking based controller is used to find this angle. To allow ship models to change dynamically as cargo offloads, the technique of extremum seeking is extended in this thesis to allow a certain type of model uncertainties.

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Aas-Hansen, Mads. "Monitoring of hull condition of ships." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11665.

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In this thesis five bulk ships from Kristian Gerhard Jebsen Skipsrederi AS has been monitored over time in order to discover the increase in resistance due to fouling on the hull and propeller. Each ship has reported weather and ship data twice a month. These reports have been used to discover the resistance due to fouling by correcting all other added resistances from each measurement in the given time period. When all other resistance types are corrected for, each measurement is as if the ship travelled in calm weather. Then these results can be compared. The resistance types that are corrected for in this thesis are: Added resistance in waves Added resistance in wind Added resistance due to steering Speed loss due to shallow water When each measurement has been corrected for these resistance types, they are corrected to a reference speed and draft to be able to compare the results properly. In addition, the extent of the added resistance due to yaw angle because of lift forces from the rudder has been investigated and found to be neglectable. It has been found that the increase in resistance due to fouling is relatively linear the first two-three years. After three years the increase in resistance gets exponential.

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Ele, Abraham Y. "Dynamics of ships and floating platforms." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27879.

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Three dimensional angular motions of ships and floating platforms are investigated using Euler's dynamical equations. The solution of Euler's equations predict two new oscillatory motions, namely roll and pitch together with a constant yawing or turning-rate. Unlike classical roll and pitch the new motions have a common period of oscillation which depends on the characteristics of the ship and the magnitude of the turning-rate. The possibility that gyroscopic coupling between rolling and pitching induce yawing is considered for unpowered platforms sitting in oblique regular waves. The rotational kinetic energy shows that for some sea states, there could be a non trivial turning-rate which minimizes the peak energy so that the platform rolls and pitches while turning at a constant-rate. Resonance takes place when the frequency of the wave coincides with the frequency of the coupled motions in still water. For ships maneuvering in regular waves, there are infinite combinations of the turning-rate and the frequency of the wave which could cause resonance. Damping, however small it may be, considerably reduces the amplitude at resonance. Regardless of its orientation with respect to the direction of wave propagation, simple rolling or pitching of an unbalanced body is not possible, instead, there is a combined roll-pitch motion having a common frequency, which does not appear to have been investigated previously.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate

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40

Amundin, Eskil. "Modeling of fatigue in RORO ships." Thesis, KTH, Marina system, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119767.

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The largest modern Pure Car and Truck Carriers (PCTC’s) are typically 230 meters long and have 13 cargo decks. In order to facilitate rapid loading and unloading these ships have been subject to a development of reducing any obstructing structures in the cargo hold, meaning that the transversal shear preventing structures, i.e. the racking bulkheads, has been taken to a minimum. Previous studies have concluded that some points on the racking bulkheads, as a result of the stripped down design, are subject to high stresses resulting from wave induced accelerations of the ship. In this M.Sc. Thesis the fatigue life of a corner of a transverse bulkhead opening in a 230 meter long PCTC with a capacity of 7200 cars is calculated with different methods. •Fatigue life is calculated from recorded ship motion data with the notch stress method in conjunction with rain flow counting and the cumulative damage principal. • Fatigue life is calculated according to (DNV CN. 30.7, 2010), based on a Lloyd’s Register FE model load case. • Actual findings on the ship are compared to the calculated results. Due to the lack of inspection data this comparison is not very extensive and only more briefly discussed. It is concluded that the fatigue life of the examined point, calculated from recorded motion data is 9.6 years and the fatigue life according to DNV is 8.0 years. It is also found that the fatigue damage is cumulated in almost discrete portions and thus the calculated fatigue life can be inaccurate when a short period of time is evaluated as is done in this thesis. A modification to the racking bulkhead with respect to fatigue life is also analyzed and it is concluded that the fatigue life in the examined point could be extended significantly by some simple modifications to the geometry.

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Chatzigiannis, Panagiotis. "Connecting Land-Based Networks to Ships." Thesis, Monterey, California. Naval Postgraduate School, 2012. http://hdl.handle.net/10945/17339.

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Approved for public release; distribution is unlimited
Today its important for ships at sea to be able to communicate and exchange information with a shore network, like file transferring, database access, e-mail, web/intranet browsing or video conferencing. Navy ships might even want to send a live video feed from the field. To accomplish this, most ships use satellite communications, an expensive and slow method. When a ship is near shore, it can use alternative methods of communicating with the shore network, which are typically faster and cost less. Examples of these methods are 802.16 WiMAX, 2G/3G cellular networks and Persistent Systems Wave Relay. The purpose of this thesis is to evaluate all of the methods available, in terms of cost, range, bandwidth, quality of service (QoS) and reliability, by an experiment taking place in Monterey Bay. The experiment results are then used to determine which method would be best suited for various use cases.

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42

LeBlanc, David. "Fire Environments Typical of Navy Ships." Digital WPI, 2002. https://digitalcommons.wpi.edu/etd-theses/610.

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Current test methodologies used to evaluate the performance of protective clothing do not adequately determine the provided level of protection. The heat fluxes imposed by current evaluation methods are not specifically related to fire environments typical to those the clothing is designed provide protection against. The U.S. Navy is in the process of developing an improved process for testing the fire resistance of daily wear uniforms and protective gear. The first phase of this project involves evaluating currently used evaluation methods and identifying the severity of fire environments that would be expected aboard Navy ships. The examination of the test protocols currently in use identifies major weaknesses, providing the justification for a new test protocol. The first step in developing an improved test protocol is to determine the types of fire scenarios that would be expected aboard Navy vessels. The nearly infinite number of possible fires are reduced to 6 typical cases involving spray fires, pool fires and furniture fires in both compartmented and unconfined cases. An analysis of the environments produced by these types of fires is presented. The effects of compartmentation parameters are also investigated to determine the critical factors that affect the expected fire environment. Expected heat fluxes for all scenarios are presented at a number of distances from the fire.

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Deybach, Frédéric. "Intact stability criteria for naval ships." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/42609.

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Harper, Justin A. 1975. "Hull form optimization for monohull ships." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/91798.

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Thesis (S.M. in Naval Architecture)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2003.
"June 2003."
Includes bibliographical references (leaves 128-132).
by Justin A. Harper.
S.M.in Naval Architecture

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45

Darvazehnoie, Akbar Shahrbaf. "Stability of ships with forward speed." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1446111/.

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The initial stability of a ship is currently evaluated by empirical formula based largely on a static approach. Evidently stability is affected by speed that causes variation of pressure distribution on the wetted surface of a ship's hull, and generated waves on the surface of water by the vessel's motion. Forces and moments resulting from bottom pressures, as the speed of the ship changes, are significantly different for the ship at rest and in a seaway. The principal aim of the research is to investigate the effect of variations of forward speed on stability of a ship in calm water. The thesis presents theoretical and experimental approaches of the research. The novelty of the research results leads to the conclusion that although increasing speed may improve the stability of a ship in some cases, it also depends on heeling angle or on any asymmetry of the wetted area of a hull. Taking into account asymmetry effects, unbalanced pressure distribution acting on the wetted surface of the hull, in some cases, hence, decrease of stability is also possible. On a moving, partially immersed body, hydrodynamic and hydrostatic forces predominate. These forces arise owing to interaction between the body's motion and its weight with respect to the surrounding water. In order to calculate these forces, the panel method of Computational Fluid Dynamics (CFD) has been applied to identify the velocity and pressure distribution on the wetted surface of a ship's hull. The mathematical model adopted is based on the source distribution on the ship's hull, known as the Kelvin source. The model for a body travelling with steady forward speed, where its motion does not disturb the free surface, is known as double body theory. For consideration of waves generated by the motion of the ship on the free surface, a three dimensional linearised potential flow solution has been utilised. Comprehensive tests conducted in the UCL towing tank have established a better understanding of the significance of variation of ship's stability associated with forward speed in calm water. It is shown that an accurate judgement regarding the ship's stability cannot be made if only the effect of forward speed, as a single parameter, is considered. The heeling angle is another important parameter that must also be taken into account. The effects of a combination of both variables have been investigated, and are reported herein. The research is presented showing that the applied CFD method may be developed as an alternative method to assess stability of a ship in seaway, but there is a long way for the CFD approach to replace towing tank testing. At present, CFD may be used for consideration as a precursor to improve ship's stability during the design stage, for modification, and before operation. It is hoped that in future the findings of the experimental approach of this form of research could be used as additional guidance to be incorporated within the stability documentation for individual ships at the design stage, and ship trials.

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Grafton, T. J. "The roll motion of trimaran ships." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1445979/.

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This thesis reports on research conducted into the roll motion of trimaran ships. After reviewing the relevant literature to determine the state of the art of roll motion prediction for both monhull and multi-hulled ships a hypothesis is set out that:- Accurate trimaran roll motion predictions can be obtained using linear Potential Flow Seakeeping theory with the roll damping term either obtained from a roll decay experiment or augmented with empirically based theoretical roll damping components developed for monohulls. This hypothesis underpins the work of many of the existing researchers who have investigated the seakeeping performance of trimaran ships, although none have formally proved it to be true. After conducting theoretical, experimental and combined theoretical and experiment studies using a single trimaran model this hypothesis is subsequently disproved. This leaves a problem: How can accurate trimaran roll motions be deteraiined The focus of the remainder of the thesis is to understand why the hypothesis is incorrect, investigating in turn each of the assumptions that underpin it. Finally, as a recipe for future researchers, a series of experimental and theoretical investigations has been devised to explore the physics of trimaran roll motion from first principals. This work has shown that, for a trimaran with significant flare above the waterline on the side hulls, roll decay coefficients cannot be measured from free decay experiments if the motion is characterised by a single degree of freedom roll equation with constant coefficients. Furthermore, it is postulated that heave and roll are strongly coupled for all trimarans. It is shown, using the results of model experiments, that this coupling breaks the assumption of linear theory where an input sinusoidal wave of constant amplitude and frequency leads to output motions which are also sinusoidal with constant amplitude and frequency.

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Zhao, Yang. "Path-following Control of Container Ships." Cleveland State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=csu1563275115222067.

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48

LeBlanc, David. "Fire environments typical of Navy ships." Link to electronic thesis, 1998. http://www.wpi.edu/Pubs/ETD/Available/etd-0501102-221341.

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49

Yeung, Tat-chuen, and 楊達存. "The Hong Kong shipping register: past, present and future." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1994. http://hub.hku.hk/bib/B31964667.

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Russell, Kevin Joseph. "Design and analysis of shipboard electrical distribution." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03242009-040322/.

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Dissertations / Theses on the topic 'Ships'

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