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.
Results
Showing 1 to 20 of 52 for “"US Navy"”.
-
Design and analysis of US Navy shipbuilding contract architecture
Contracting for US Navy ship procurement is complex due several factors such as budgetary and political concerns, sole or near sole source environments, and long lead-time construction. In the current climate of shrinking budgets, it is especially important to set programs up for financial success. …
-
Acute febrile respiratory illness aboard ships in the US Navy
… In the shipboard environment the environmental, susceptibility and exposure factors that favor the spread of A/FRI are augmented. This paper assesses the risk of A/FRI aboard US Navy ships and compares that risk to preparations and policy already in place to reduce the risk of epidemics aboard …
-
Modeling and Monitoring of Otolith Organ Performance in US Navy Operating Environments
Previous mathematical modeling work has produced a transfer function that relates otoconial layer displacement to stimulus acceleration. Due to the complexity of this transfer function, time domain solutions may be obtained only through numerical methods. In the current work, several approximations …
-
Flexibility in early stage design of US Navy ships : an analysis of options
… a framework for analyzing their benefit to the Navy. Future demands on Navy warships, such as new or changing missions and capabilities, are unknowns at the time of the ship's design. Therefore, ships often require costly engineering changes throughout their service life. These are expensive …
-
Evaluation of non-intrusive monitoring for condition based maintenance applications on US Navy propulsion plants
The thesis explores the use of the Non-intrusive Load Monitor (NILM) in Condition Based Maintenance (CBM) applications on US Navy ships as part of the Office of Naval Research Electric Ship Integration (ESI) Initiative. The NILM is a device that measures an electrical component's performance by …
-
Multi-attribute tradespace exploration for US Navy surface ship survivability: a framework for balancing capability, survivability, and affordability
In a political environment of austerity, the importance of understanding the design tradeoffs for new naval ship concept designs cannot be understated. A combination of a tightened shipbuilding budget, large high-priority procurement programs, and an emphasis on affordability will require high …
-
Ship Design Optimization Using Asset
… vessels. They are LHA(R), a replacement for the US Navy amphibious assault ship and DDG51, a destroyer class vessel. The overall measure of effectiveness (OMOE) and the lead ship acquisition cost (LCA) are considered to be the objective functions. The evaluation of feasibility of the designs and …
-
Design, evaluation, and validation of a naval ship structural health monitoring tool
The US Navy implements structural preventative maintenance procedures onboard its vessels using ship's personnel inspection. These procedures have been largely successful in identifying major problem areas before any interference with mission execution has occurred. However, changes in the Navy's …
-
Numerical simulation of hydrothermal salt separation process and analysis and cost estimating of shipboard liquid waste disposal
… regulations, waste water disposal for US Navy ships has become a requirement which impacts both operations and the US Navy's budget. In 2006, the cost for waste water disposal Navy-wide was 54 million dollars. There are many advanced waste water treatment technologies in the research …
-
Non-intrusive vibration monitoring in US Naval and US Coast Guard ships
… harvesting accelerometer installed in motors on US Navy and US Coast Guard vessels used to monitor equipment vibration and diagnose the source of the high vibrations. Utilizing the observations and tools designed by the VAMPIRE project as a foundation, this thesis takes the LEES lab-designed …
-
Electrical ship demand modeling for future generation warships
… shipboard consumption continues to rise. Current US Navy policy, codified in design standards, dictates methods of calculating the average demand power. Using several modern sources of information for the DDG-51 class ship, this thesis investigates the utility of current analysis techniques and …
-
Machinery diagnostics and characterization through electrical sensing
Two methods of non intrusive sensing and their applications for machinery condition monitoring, energy score keeping, and human activity are presented here. The first method uses existing research on Non Intrusive Load Monitoring (NILM) to refine transient detection methods using image …
-
Naval Submarine Maintenance: An Examination of Areas of Potential Availability Execution Risk
… Power Competition' of the 21st century, the US Navy has faced near-peer competition that it has not experienced in several decades. This competition has ultimately resulted in increased operational strains on the submarine fleet which have in turn trickled down to affect the nuclear submarine …
-
A system dynamics model of the integration of new technologies for ship systems
System dynamics has been used to better understand the dynamics within complex natural and social systems. This understanding enables us to make decisions and define strategies that help to resolve the problematic behaviors associated within these systems. For example within an operating …
-
Design of Supplementary Thrusting Unit for a Miniature Autonomous Submarine
The focus of this work is to design and construct a version of the secondary propulsion units used on US Navy submarines for the Virginia Tech 690 autonomous underwater vehicle. These units were used to demonstrate a control system developed in a separate study which allowed the vehicle to …
-
Evolution: advancing Communities of Practice in naval intelligence
The US Navy is embracing the principles of Knowledge Management (KM). One of the key components of KM is the Community of Practice. Communities of Practice are groups that form to share what they know, and to learn from one another regarding some aspect of their work. Organizations are strengthened …
-
Estimation of ship construction costs
… end of the Cold War naval procurement for the US Navy has seen a dramatic decrease. This decrease in defense spending has placed existing programs under more scrutiny than previous years. As a result there is less tolerance on the part of taxpayers and Congress for procurement cost growth. This …
-
Resource Burden of Logistics to Navy Ships Under Threat Scenarios
… the fully burdened cost of supply in a self-sustaining logistics network in which local infrastructure cannot be counted on to supply logistics assets. This thesis develops this method for the US Navy by building a model of Navy supply transport and using it to estimate the Total Resource …
-
The joint modular intermodal container, is this the future of naval logistics?
… the typically manpower intensive United States Navy has had to learn to do more with less of everything, in many cases specifically less sailors. One mission area that is prime for manpower reduction is naval logistics. JMIC, the Joint Military Intermodal Container is a combined Naval Sea …
-
Adequacy of Federal Marine Salvage Policy in the United States
… the federal government has fostered this industry by adopting the International Convention on Salvage, contracting with private salvors to support the US Navy, and requiring tank and large non-tank vessels to maintain standing agreements with salvors. In addition, the federal government has …
Page 1 of 3