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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

Network shortest path application for optimum track ship routing /

Montes, Anel A. January 2005 (has links) (PDF)
Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2005. / Thesis Advisor(s): Gerald G. Brown. Includes bibliographical references (p. 73-74). Also available online.
102

The concept of separable motive and cargo parts of a ship's hull

Teasdale, J. A. January 1970 (has links)
No description available.
103

Katherine Anne Porter's Fiction : Man in a Falling World

Ferguson, Susan Margaret 08 1900 (has links)
This thesis argues that Katherine Anne Porter's novel, Ship of Fools, "is not a departure from the body of Porter's work which precedes it, but a culmination in theme and technical achievement."
104

SHIP® With a client experiencing Meige’s Syndrome : a Hermeneutic Single-Case Efficacy Study

Steenkamp, Casper Jan Hendrik January 2018 (has links)
SUMMARY Meige’s syndrome is classified as a rare form of focal dystonia characterized by the following clinical features: • Facial, lingual, masticatory, pharyngeal, laryngeal and cervical dystonia. • Involuntary lower facial and jaw movements, including lip pursing, grimacing, jaw opening and closing and chewing. These movements may be tremor-like. • The symptoms typically begin focally and then spread to contiguous muscles. • The average onset occurs after 50 years of age. The aetiology of Meige’s syndrome remains unclear. It is currently considered to be multifactorial and to include genetic, psychogenic, neurological and environmental factors. Most of the current treatments for Meige’s syndrome require medical intervention. This is inherently invasive and has several possible side effects. At the time of writing the researcher was not aware of any studies investigating the efficacy of psychotherapy as a treatment for Meige’s syndrome. Furthermore, no publications have appeared on SHIP® as a treatment for Meige’s syndrome. Meige’s syndrome is often accompanied by depression and a marked reduction in quality of life. Psychotherapeutic interventions are generally focused on addressing the debilitating effect of Meige’s syndrome on a person’s life and not on treating the symptoms of Meige’s syndrome which are the result of unresolved psychological trauma. Given the probability that the symptoms may have a psychogenic origin, it was decided to investigate psychotherapy as a treatment option for alleviating Meige’s syndrome symptoms. SHIP® is described as a modality that contains both theoretical and practical components. SHIP® works according to a trauma-spectrum model which views all types of trauma, including PTSD and complex PTSD, as situated on a spectrum. The scope of trauma is seen to be broader than is presently recognized in the Diagnostic and Statistical Manual of Mental Disorders, 5th edition. Traditional psychological and physiological symptoms are classified as trauma-spectrum manifestations (TSM) in SHIP® theory. Examples of TSM range from loss of spontaneity, fragmentation of memory, compromise in personality structure, depression and anxiety to physiological symptoms like headaches or neurological dysfunctions. From a SHIP® perspective, the physical manifestations of Meige’s syndrome are conceptualized and treated as TSM. In order to investigate the efficacy of SHIP® as a treatment modality for Meige’s syndrome, the hermeneutic single-case efficacy design (HSCED) was chosen. The HSCED is a naturalistic design that makes use of multiple quantitative and qualitative data sources to draw inferences about the efficacy of psychotherapy. The HSCED design, which is flexible and compatible with different psychotherapeutic modalities, was judged to be a good fit for investigating the efficacy of SHIP® as a treatment modality for Meige’s syndrome. In accordance with the HSCED framework, the research addressed these questions: 1) What data collection methods within the HSCED framework can be utilised to compile a rich case record? 2) Does the data analysis show a change in Meige’s syndrome symptoms over the course of SHIP®? 3) Does the data show evidence for the causal role of SHIP® in the change of symptoms? 4) What factors (including moderator variables) could be accountable for the change? 5) What conclusions and recommendations can be made based on the results of the study? The following data collection methods were used: idiographic case information, Rorschach inkblot method (RIM) pre- and post-SHIP®, a customized questionnaire pre- and post-SHIP®, a change interview post-SHIP®, weekly outcomes measures and records of psychotherapy sessions. After the collection and analysis of data, evidence of the change brought about by psychotherapy was considered. The researcher then considered eight possible non-psychotherapy explanations for the change in symptoms, as recommended by Elliott (2002). After considering evidence, both an affirmative and a sceptic’s case are presented. The affirmative case argues that post-psychotherapy changes are the result of SHIP® and the sceptic’s case argues alternative explanations for change. After both cases have been presented, the conclusions are drawn, the limitations of the research are considered and recommendations are made for future research. / Mini Dissertation (MA Clinical Psychology)--University of Pretoria, 2018. / Psychology / MA Clinical Psychology / Unrestricted
105

Influence of Trimaran Geometric Parameters on Intact and Damaged Ship Stability

Weidle, William Scott 08 December 2017 (has links)
Multi-hull vessels have been considered for high-speed, military and commercial applications for decades. More recently the trimaran vessel, with three hulls, has captured interest among naval ship designers and stakeholders. A definition of multi-hulls is introduced as a continuum with monohulls on one end, catamarans on the other, and trimarans in-between. A review of methods to assess intact and damaged stability follows in addition to an overview of current research in the area of dynamic stability for monohulls and trimarans. An investigation of intact stability characteristics for multi-hulls along the continuum is presented and their trends are examined. Next, a series of trimaran configurations are modeled in CAD with subdivision to determine their allowable KG according to USN deterministic criteria and using quasi-static methods. A response surface model was determined for allowable KG as a function of center hull length to beam, side hull beam to draft, transverse position, and displacement for use as a rule of thumb measure and potential optimization constraint. / Master of Science
106

A Hyperspectral Imager for a Cubesat to Identify Ocean Ship Parameters

Koehn, Tabitha 12 September 2017 (has links)
A Hyperspectral imager aboard a cubesat would be able to provide images which could be used to identify ships and determine the ship's length and breadth and heading. Depending on the size of the ship, the speed the ship is traveling can be determined as well; however the speed and size determination is limited by the spatial resolution of 100 meters. The spectral signature of the boat is dramatically different from the spectral signature of the open Ocean especially within the range of 400 to 1000 nanometers, and this threshold is the basis for extracting ship data. Hyperspectral Imagers are ideal for minimization with few optical errors introduced, and designs range in durability making them useful on board small satellites especially in the visible and near infrared region. Placing an imager on a satellite allows for consistent observation over a region to identify patterns in ship movement over time. / Master of Science
107

Application of Lyapunov Exponents to Strange Attractors and Intact & Damaged Ship Stability

Story, William Robert 10 June 2009 (has links)
The threat of capsize in unpredictable seas has been a risk to vessels, sailors, and cargo since the beginning of a seafaring culture. The event is a nonlinear, chaotic phenomenon that is highly sensitive to initial conditions and difficult to repeatedly predict. In extreme sea states most ships depend on an operating envelope, relying on the operator's detailed knowledge of headings and maneuvers to reduce the risk of capsize. While in some cases this mitigates this risk, the nonlinear nature of the event precludes any certainty of dynamic vessel stability. This research presents the use of Lyapunov exponents, a quantity that measures the rate of trajectory separation in phase space, to predict capsize events for both intact and damaged stability cases. The algorithm searches backwards in ship motion time histories to gather neighboring points for each instant in time, and then calculates the exponent to measure the stretching of nearby orbits. By measuring the periods between exponent maxima, the lead-time between period spike and extreme motion event can be calculated. The neighbor-searching algorithm is also used to predict these events, and in many cases proves to be the superior method for prediction. In addition to the ship stability research, the Lyapunov exponents are used in conjunction with bifurcation analysis to determine regions of stable behavior in strange attractors when the system parameters are varied. The boundaries of stability are important for algorithm validation, where these transitions between stable and unstable behavior must be accounted for. / Master of Science
108

"SEA ARCHER" Distributed Aviation Platform

Keller, Joe, Ivey, James, Dalakos, Antonios, Okan, Orhan, Kuchler, Ryan, Cooke, Rabon, Stallings, Brad, Searles, Scot, Gokee, Mersin, Lashomb, Pete, Byers, David, Papoulias, Fotis, Ciezki, John, Ng, Ivan 12 1900 (has links)
Includes supplemental material. / This report outlines the results of a two quarter Total Ship Systems Engineering (TSSE) Capstone design project undertaken by the students at the Naval Postgraduate School. The project was under the direction of Professors C.N. Calvano and R.Harney. / Currently, no system exists that provides a sea-based distributed aviation platform capability. The emergence of Unmanned Air Vehicles (UAVs) / Unmanned Combat Air Vehicles (UCAVs), the continued U.S. Navy focus on the littorals, the desire for force distribution, the need for operational cost reductions, and the advent of Network Centric Warfare (NCW) all continue to support the requirement to re-evaluate how littoral operations will be conducted in the future. Given this background, a bottom-up design of a ship supporting a primarily UAV/UCAV air wing in a low to medium threat environment is of significant interest. SEA ARCHER meets this interest. This report outlines a design that meets the future needs for distributed aviation with a high-speed, highly automated platform. Large gains in reduced manning through automated systems for both operation and damage control helpmeet the demanding needs for the future of the Navy at reduced operational costs. The report will outline both the Mission Needs Statement (MNS) and Operational Requirements Document (ORD) for the ship that was developed. The analysis of alternatives that was conducted to determine relative size requirements for the ship in presented in the next section. The concept design that resulted as a result of the Total Ship Systems Engineeing process in then presented. Finally, a detailed look at the analysis and trade studies that were conducted in presented in order to show the more detailed analysis that was conducted in designing the ship.
109

Modelagem e análise de duas alternativas para operações de transferência de petróleo entre dois navios em alto-mar. / Modeling and analysis of two alternatives for underway ship-to-ship transfer of oil in open sea.

Souza, Carlos Eduardo Silva de 24 August 2012 (has links)
Navios aliviadores com sistemas de posicionamento dinâmico (SPD) são dispendiosos. Dessa forma, é desejável que se otimize sua utilização, por exemplo, através da redução da quantidade de viagens entre as plataformas em alto-mar e os terminais na costa. Quando o petróleo produzido é destinado à exportação, uma solução é transferi-lo diretamente do aliviador ao navio exportador (geralmente um VLCC) através das operações conhecidas como ship-to-ship, ainda em alto-mar e próximo aos campos de produção. No entanto, uma vez que VLCCs raramente são providos de SPD, é necessário que se desenvolvam formas de se assegurar a controlabilidade de ambos os navios durante a operação de transferência. Nesse sentido, duas diferentes configurações de operações ship-to-ship são propostas. Uma delas consiste em realizar a transferência com os navios avançando lado a lado. As embarcações são amarradas e então o VLCC desenvolve potência avante, rebocando o aliviador que mantém suas máquinas ociosas. A outra solução consiste em transferir o petróleo enquanto os navios mantêm uma formação em comboio, com o VLCC seguindo uma trajetória arbitrária e sendo seguido pelo aliviador, que mantém uma distância relativa através de uma estratégia específica de piloto automático. Os modelos dinâmicos para ambas as operações são desenvolvidos e implementados em simuladores numéricos. Os resultados das simulações são discutidos e utilizados para que se avalie a viabilidade operacional das operações sob diferentes condições ambientais e de carregamento dos navios. / Shuttle tankers with dynamic positioning (DP) systems are expensive ships. Therefore, it is desirable to optimize their usage by, e.g., eliminating the travels between offshore platforms and the terminals in the coast. When the oil is intended to exportation, an attractive idea is to transfer it between the shuttle tanker and the exporter ship (usually a VLCC) in open sea, close to the oil fields. However, since a VLCC is rarely provided with a DP system, it is necessary to develop alternative ways of attaining controllability of both vessels while the transfer operation is performed. In this sense, two configurations for the so-called ship-to-ship operations are proposed. One of them consists in performing the transfer with underway ships, arranged side-by-side. The vessels are moored together and the VLCC develops power ahead, towing the idle shuttle tanker. Another alternative is to transfer the oil while the ships maintain a convoy formation, with the VLCC trailing a given trajectory and being followed by the shuttle tanker, which keeps a constant relative position by means of an appropriate autopilot strategy. Dynamic models are developed for both operations and implemented in numerical simulators. The simulations results are discussed and used to outline the operational viability under different combinations of environment and loading conditions.
110

International Ship Finance Regime - Comparative Study of Chinese, American, British and International Ship Finance Regimes

Unknown Date (has links)
The purpose of this dissertation is to study on the Chinese, American, British, Korean, Japanese and international ship finance regimes on a comparative basis. The first part of the dissertation introduces various shipping finance sources. The second part of the dissertation focuses on analysis of the loan agreement, security documents and other related legal documentation and their principal clauses as well as implications to the shipping finance practice. The author then researches on the ship lease financing in China, Coastwise Trade Endorsement and Jones Act Sale Leaseback in the United States, Tax Lease regime in the UK and government finance models in Japan and Korea. The author also compares the ship mortgage regimes in China, the United States, Liberia and the Marshall Islands, and illustrates practices and legal issues in connection with ship construction, sale and purchase and classification society. In the final part of the dissertation, the authors proposes alternatives and improvements for Chinese shipping finance and advantages of the U.S., Japanese and Korean regimes which China could learn from. / acase@tulane.edu

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