Abstract: Embodiments of a system for recovery of a target aircraft by a host aircraft, the system including a towline having a proximal section configured to be coupled with the host aircraft and a distal section configured to be paid out from the host aircraft, a fitting coupled with the distal section of the towline, wherein the fitting comprises a housing, a global navigation satellite system receiver (e.g., without limitation, a GPS receiver), and a global navigation satellite system antenna. In some embodiments, when paid out from the host aircraft, the towline is configured to be in a substantially vertical orientation. The system of some embodiments can further include a capture mechanism configured to be coupled with a fuselage of the target aircraft and configured to capture the fitting.

Abstract: Embodiments of a system for recovery of a target aircraft by a host aircraft, the system including a towline having a proximal section configured to be coupled with the host aircraft and a distal section configured to be paid out from the host aircraft, a fitting coupled with the distal section of the towline, wherein the fitting comprises a housing, a global navigation satellite system receiver (e.g., without limitation, a GPS receiver), and a global navigation satellite system antenna. In some embodiments, when paid out from the host aircraft, the towline is configured to be in a substantially vertical orientation.

Abstract: A waterproof speaker and audio system that can be worn in one or more holding pockets in a wetsuit, neoprene collar, or other garment, the waterproof speaker and audio system having one or more components. A first component may have one or more of the following: a transmitter unit, speaker, amplifier, digital audio file storage space (for example, MP3 or Windows Media Audio file), rechargeable battery, one or more buttons, one or more input and output ports such as a universal serial bus (USB) port for charging the battery and file transfer, one or more LED lights to indicate battery charge, a screen to provide audio file information including track number, and an FM and AM radio, and a second component designed to work in connection with the first component which may have one or more of the following: an amplifier, rechargeable battery, speaker, receiver, and one or more control buttons.

Abstract: The present invention is directed to a waterproof speaker and audio system that can be worn in one or more holding pockets in a wetsuit, neoprene collar, or other garment, the waterproof speaker and audio system has one or more components, a first component having one or more of the following: a transmitter unit, speaker, amplifier, digital audio file storage space (for example, MP3 or Windows Media Audio file), rechargeable battery, one or more buttons, one or more input and output ports such as a universal serial bus (USB) port for charging the battery and file transfer, one or more LED lights to indicate battery charge, a screen to provide audio file information including track number, and an FM and AM radio, and a second component designed to work in connection with the first component having one or more of the following: an amplifier, rechargeable battery, speaker, receiver, and one or more control buttons.

Abstract: An explosive and narcotics detection system detects the presence of trace particles of those materials that are adhering to surfaces. In order to detect such particles, it is necessary to first dislodge or release them from the surface, next to transport them to the detection instrument, and last to accumulate them on or in a particle collection device associated with the instrument. Narcotics and explosive particles are often bound tenaciously to the surface, and simple techniques, such as blowing air, will either remove only the largest particles or none at all. A nozzle to release particles of narcotics and explosives employs a coaxial configuration that permits particle release at an increased distance from the nozzle compared to existing devices.

Abstract: Method for treating a moving surface during a transient condition in a computational fluid dynamics system multi-cell computer model, the model having a fixed underlying geometric grid, includes identifying cells in the grid adjacent the moving surface at the beginning of a transient time step and identifying beginning adjacent cell boundaries formed in the grid by the moving surface. The method also includes computing effective thermophysical value fluxes through the beginning cell boundaries in accordance with the sense of the movement of the moving surface relative to the beginning adjacent cells. The method further includes solving transport equations for all the cells to determine cell thermophysical values at the end of the time step, using the computed effective fluxes and reforming the grid to comply with the moving surface at the end of the time step. Apparatus includes a digital computer programmed to carry out the above method.

Abstract: Method and apparatus are disclosed for implementing a geometric multi-cell system dynamics model having an embedded grid, the embedded grid having cells with a finer grid size relative to the grid size of other cells. The apparatus includes a digital computer having a computational fluid dynamics model program stored therein, the program having software for iteratively solving transport equations for thermophysical values for the embedded cells and the other cells, and for solving residual equations for the values for each cell using a multi-grid computation method. The program also has other software for computationally manipulating the embedded grid cells to provide composite cells of the same grid size as the other cells and having averaged residual thermophysical values, for allowing the multi-grid computation method to operate on the embedded grid cells.

Abstract: Method and apparatus for modeling a dynamic system include a digital computer and a multi-cell system dynamics modeling program stored in the computer. The modeling program has an iterative calculation routine for calculating one or more thermophysical values for each model cell. The routine employs one or more initial iterations using the latest calculated thermophysical values to solve transport equations between each individual cell of at least a portion of the multi-cell model and adjacent cells, to provide intermediate thermophysical values, and a final iteration using the intermediate thermophysical values to provide the thermophysical values representative of each individual cell.

Abstract: Method for forming a fixed geometric grid for a fluid dynamics system multi-cell computer model, the system having one or more surfaces, includes representing the system surfaces by an array of contiguous polygons. The method also includes creating a single model cell that encompasses the entire system and assigning all the surface polygons to the single model cell. The method further includes subdividing at least the portion of the single model cell encompassed by the surface polygon array, including subdividing all intersected assigned polygons, using one or more subdividing planes. The method still further includes reassigning the surface polygons to respective subdivided cells resulting from the subdividing step, identifying those subdivided cells having two or more surface polygons from a common system surface, and calculating effective common boundary areas and normal vectors for those cells. The method also includes treating “split” cells and “sliver” cells.