This paper reports on the dual time-of-flight mass spectrometer coupled to a magnetron based source for metal nanoclusters and an electrospray ion source for gas phase studies, all developed indigenously. The system consists of a reflectron time-of-flight and a linear time-of-flight mass spectrometers positioned perpendicular to each other. It can distinctly measure time events separated by 1.4...

Aircraft sensors are typically cable powered, imposing a significant weight overhead. The exploitation of temperature variations during flight by a phase change material (PCM) based heat storage thermoelectric energy harvester, as an alternative power source in aeronautical applications, has recently been flight tested. In this work, a scaled-down and a scaled-up prototype are presented. Output...

Conclusions The important message that emerges from a consideration of insect flight is that the peculiar specializations that make flight possible make much more sense when viewed within the context of the system as a whole. Simple scaling laws and the loss of aerodynamic performance at low Reynolds numbers require that small insects flap at high frequency, a physical constraint that drove the...

This paper presents a design and simulation of the functions of a Flight Management System (FMS) in order to follow automatically four-dimensional trajectories. This is achieved by controlling the aircraft airspeed, altitude, heading and vertical speed in order to arrive to the merging point in the specified time. The system receives data from the aircraft and computes new control parameters ba...

The NASA Goddard Space Flight Center is developing a guidance, navigation, and control flight software product line that includes both processes and their accompanying products. The processes include a domain and application engineering process that have been influenced by Synthesis[1] and FAST[2]. The products include graphical and textual analysis/design documents and the flight software repo...

The MICROTREX (Micro Telerobotic Experiment) project proposes to use a small flight telerobot in low earth orbit to perform ground-controlled telerobotics experiments. These experiments will evaluate the effectiveness of ground-based control of an orbital telerobot in the presence of variable communications time-delay using a variety of control techniques including closed-loop force feedback po...

MARVIN is an autonomously flying robot based on a model helicopter. It is designed for search and reconnaissance operations in an unknown environment with possible treats such as fires, water fountains, and smoke. The overall system consists of the helicopter with a microcontroller based on-board computer and a ground station computer. While flight control is done on-board, mission planning, hu...

The oscillation susceptibility of the ADMIRE aircraft along the path of longitudinal flight equilibriums is analyzed numerically in the general and in a simplified flight model. More precisely, the longitudinal flight equilibriums, the stability of these equilibriums, and the existence of bifurcations along the path of these equilibriums are researched in both models. Maneuvers and appropriate ...

We describe two MR angiographic methods of diagnosing subclavian steal in each of three patients. By using phase-directional information from a single two-dimensional phase-contrast sequence, we were able to show that the direction of flow in the affected vertebral artery was reversed. The same vertebral artery showed no signal on a 2-D time-of-flight sequence with a concatenated presaturation ...

In 2011 the National Aeronautics and Space Administration (NASA) began a five-year Project to address the technical barriers related to routine access of Unmanned Aerial Systems (UAS) in the National Airspace System (NAS). Planned in two phases, the goal of the first phase was to lay the foundations for the Project by identifying those barriers and key issues to be addressed to achieve integrat...