Melanie Sandberg

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Surface congestion leads to significant increases in taxi times and fuel burn at major airports. In this paper, we formulate the airport surface congestion management problem as a dynamic control problem. We address two main challenges: the random delay between actuation (at the gate) and the server being controlled (the runway), and the need to develop(More)
There is a need for reliable and easy to use measurement techniques that can provide information about the ventilation and air distribution within buildings, in order to verify performance or trace possible reasons for insufficient air quality. Ventilation air is often unevenly distributed in a building. Recent development of tracer gas methods offer robust(More)
Using advanced sample engineering we performed simultaneous measurements of interlayer tunneling characteristics and in situ monitoring of temperature in Bi(2)Sr(2)CaCu(2)O(8 + delta) (Bi-2212) mesas. Together with a systematic study of size dependence of interlayer tunneling, this allowed unambiguous discrimination between artifacts of self-heating and(More)
We present measurements of a topological property, the Chern number (C_{1}), of a closed manifold in the space of two-level system Hamiltonians, where the two-level system is formed from a superconducting qubit. We manipulate the parameters of the Hamiltonian of the superconducting qubit along paths in the manifold and extract C_{1} from the nonadiabatic(More)
We have generated frequency combs spanning 0.5 to 20 GHz in superconducting λ/2 resonators at T=3  K. Thin films of niobium-titanium nitride enabled this development due to their low loss, high nonlinearity, low frequency dispersion, and high critical temperature. The combs nucleate as sidebands around multiples of the pump frequency. Selection rules for(More)
Surface congestion management has received increased attention worldwide, largely due to its potential to mitigate operational inefficiencies and environmental impact. Most prior efforts have focused on demonstrations of a proposed congestion management approach at a particular airport, and not on the adaptation of a particular approach to a range of(More)
Airport surface congestion control has the potential to mitigate the increase in taxi times and fuel burn at major airports. One possible class of congestion control strategies predicts the departure throughput, and recommends a rate at which to release aircraft pushbacks from the gate. This paper describes the field-testing of these types of strategies at(More)
Airport surface congestion control has the potential to mitigate the increase in taxi times and fuel burn at major airports. This paper describes the implementation of a congestion control strategy at Boston Logan International Airport (BOS). The approach predicts the departure throughput in the next 15 minute interval, and recommends a rate at which to(More)
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