Recently, the ATM community has made important progress in collaborative trajectory management through the introduction of a new FAA traffic management initiative called a Collaborative Trajectory Options Program (CTOP). FAA can use CTOPs to manage air traffic under multiple constraints (manifested as flow constrained areas or FCAs) in the system, and it allows flight operators to indicate thei...

In recent years, Wireless Sensor Networks (closely deployed nodes) are widely used in applications ranging from weather forecasting to defense. It comprises of data gathering nodes (source), transmitting nodes (routers) and data collecting node. Wide research sprang in this area for improving the efficiency of these networks in terms of packet delivery ratio, throughput and reliability by modif...

Over the last two decades, processor speeds have been improving much faster than memory speeds. As a result, memory access delay is a major performance bottleneck in today’s systems. Because compilers often fail to automatically choreograph data and computation to avoid memory access delay, we have developed a source-to-source transformation tool for this purpose. To use our tool, developers an...

We propose a robust optimization approach to minimize total propagated delay in the aircraft routing problem, a setting first developed by Lan et al. (2006) and then extended by Dunbar et al. (2012, 2014). Instead of minimizing the expected total propagated delay by assuming that flight leg delays follow specific probability distributions, our model minimizes the maximal possible total propagat...

We used historical data to build two types of model that predict Ground Delay Program implementation and also produce insights into how and why those implementation decisions are made. More specifically, we built behavioral cloning and inverse reinforcement learning models that predict hourly Ground Delay Program implementation at Newark Liberty International and San Francisco International air...

road accident severity may be influenced by a number of various systematic causal factors. the weather and road accidents have a close relationship with each other and a number of methods have been proposed for measuring the risk of a road accident with rainy, foggy, and snowy weather and high winds. recent studies indicate that road collision rates increase during precipitation. the weather wa...

An airborne radar simulator for an X-band echo signal was implemented and numerically verified. The can consider weather conditions over a large area use measured S-band data as input. A scheme is presented the conversion of to one. amplitude time delay due particles be theoretically calculated on basis reflectivity. dynamics platform clutter were modeled using Doppler frequency shift in signal...