Abstract: A method and system, the method including receiving a set of requirements for a software application, the set of requirements comprising a plurality of software requirements identified for the software application; analyzing the set of requirements to determine dependencies between the plurality of software requirements in the set of requirements; generating a visualization of the determined dependencies and test boundaries between the plurality of software requirements in the set of requirements; storing the generated visualization of the determined dependencies and test boundaries between the plurality of software requirements in the set of requirements in a record; and applying the determined dependencies in the record to at least one of (i) optimize test steps in a test procedure and (ii) generate an executable test procedure that exercises external inputs and outputs for the software application.

Abstract: A method and system, the method including receiving a set of requirements for a software application, the set of requirements comprising a plurality of software requirements identified for the software application; analyzing the set of requirements to determine dependencies between the plurality of software requirements in the set of requirements; generating a visualization of the determined dependencies and test boundaries between the plurality of software requirements in the set of requirements; storing the generated visualization of the determined dependencies and test boundaries between the plurality of software requirements in the set of requirements in a record; and applying the determined dependencies in the record to at least one of (i) optimize test steps in a test procedure and (ii) generate an executable test procedure that exercises external inputs and outputs for the software application.

Abstract: A method and apparatus for harvesting energy in a fuel cell powered vehicle has first and second energy harvesting elements with at least two ends, the first end being electrically insulated from and in thermal communication with a high temperature reservoir associated with the fuel cell, the second end being electrically insulated from and in thermal communication with a low temperature reservoir associated with an exterior of the vehicle. The apparatus has particular utility for use in watercraft, specifically an underwater vehicle. The energy harvesting apparatus can include an electrical storage means for storing the energy harvested, and/or an electric load for consuming the energy harvested.

Abstract: A reactive power compensation system includes a distributed energy resource situated at a local location configured to also receive power from a remote location by a distribution feeder line. The distributed energy resource includes an inverter including power semiconductor switching devices and an inverter controller configured for controlling the power semiconductor switching devices so as to provide reactive power support to the distribution feeder line.

Abstract: A method and apparatus for harvesting energy in a fuel cell powered vehicle has first and second energy harvesting elements with at least two ends, the first end being electrically insulated from and in thermal communication with a high temperature reservoir associated with the fuel cell, the second end being electrically insulated from and in thermal communication with a low temperature reservoir associated with an exterior of the vehicle. The apparatus has particular utility for use in watercraft, specifically an underwater vehicle. The energy harvesting apparatus can include an electrical storage means for storing the energy harvested, and/or an electric load for consuming the energy harvested.

Abstract: A hull structure is provided for a marine vessel having an inner hull and an outer hull. An energy storage device is provided between the inner hull and outer hull. The energy storage device has one or more hollow tubes, or has a honeycomb structure. Hydrogen or oxygen can be stored and placed within the hollow tubes or honeycomb structure. A metal hydride, or liquid hydrogen or compressed hydrogen gas, as well as liquid oxygen or compressed oxygen gas can also be stored inside the hollow tubes or honeycomb structure. The dual use of the hull structure provides for an energy storage apparatus and propulsion generation system that conserves space within the marine vessel, and adds less weight to the marine vessel.

Abstract: A hybrid power/propulsion system for a vehicle is provided that combines a fuel cell with a battery. A fuel cell, which uses a hydrogen and oxygen supply in fluid communication with the fuel cell, is combined with a battery system for power generation for a vehicle. The fuel cell is used when a low power is required by the vehicle, and the fuel cell is used in combination with the battery system when high power is required by the vehicle. The vehicle can be a land or marine vehicle, which can be a surface vessel or underwater vehicle.

Abstract: A method of monitoring a physical parameter comprises receiving a sensor signal representative of an actual value from each of a plurality of sensors. The method further comprises calculating confidence value for each sensed value and a weighted average of actual values of the sensor signal by weighting each sensed value by the respective confidence value. The weighted average is used to determine a corresponding value of the sensed parameter.

Abstract: A regenerative fuel cell is combined with a combustion engine such as a Pulse Detonation Engine (PDE) to create a closed-loop power generation system. Stored hydrogen and oxygen are used by the regenerative fuel cell, and by the combustion engine, in which the reaction of the hydrogen and oxygen produces water in the gas phase (steam). The steam is used to generate work from a turbine shaft, which is used to drive a propulsion system for the marine vessel. After the steam passes through the turbine, the steam is cooled back to liquid water by a condenser, and stored with the water produced by the regenerative fuel cell. The stored water can be converted back into hydrogen and oxygen by using electrical power external to the closed-loop system. After regeneration of the water into hydrogen and oxygen, the closed-loop power system would be ready for operation again.

Abstract: A regenerative fuel cell is combined with a combustion engine such as a Pulse Detonation Engine (PDE) to create a closed-loop power generation system. Stored hydrogen and oxygen are used by the regenerative fuel cell, and by the combustion engine, in which the reaction of the hydrogen and oxygen produces water in the gas phase (steam). The steam is used to generate work from a turbine shaft, which is used to drive a propulsion system for the marine vessel. After the steam passes through the turbine, the steam is cooled back to liquid water by a condenser, and stored with the water produced by the regenerative fuel cell. The stored water can be converted back into hydrogen and oxygen by using electrical power external to the closed-loop system. After regeneration of the water into hydrogen and oxygen, the closed-loop power system would be ready for operation again.

Abstract: Methods and apparatus for operating a gas turbine engine without sustained detrimental levels of dynamic pressure are provided. The engine includes a combustor. The method includes determining the combustor acoustic level amplitude, comparing the acoustic level to a predetermined upper acoustic limit, and adjusting a fuel flow distribution to the combustor using a closed loop controller to facilitate reducing the acoustic level to a predetermined lower acoustic limit that is less than the upper acoustic limit.