DSpace Community:http://hdl.handle.net/2440/112014-09-22T00:10:41Z2014-09-22T00:10:41ZRotational study of carbon monoxide solvated with helium atomsSurin, L.Potapov, A.Dumesh, B.Schlemmer, S.Xu, Y.Raston, P.Jager, W.http://hdl.handle.net/2440/853612014-09-20T08:27:35Z2007-12-31T13:30:00ZTitle: Rotational study of carbon monoxide solvated with helium atoms
Author: Surin, L.; Potapov, A.; Dumesh, B.; Schlemmer, S.; Xu, Y.; Raston, P.; Jager, W.
Abstract: High resolution microwave and millimeter-wave spectra of HeN-CO clusters with N up to 10, produced in a molecular expansion, were observed. Two series of J = 1-0 transitions were detected, which correspond to the a-type and b-type J = 1-0 transitions of He1-CO. The B rotational constant initially decreases with N and reaches a minimum at N = 3. Its subsequent rise indicates the transition from a molecular complex to a quantum solvated system already for N = 4. For N > or =6, the B value becomes larger than that of He1-CO, indicating an almost free rotation of CO within the helium environment.2007-12-31T13:30:00ZThe response of super pressure balloons to gravity wave motionsVincent, R.A.Hertzog, A.http://hdl.handle.net/2440/848592014-09-02T00:45:10Z2012-12-31T13:30:00ZTitle: The response of super pressure balloons to gravity wave motions
Author: Vincent, R.A.; Hertzog, A.
Abstract: Superpressure balloons (SPB), which float on constant density (isopycnic) surfaces, provide a unique way of measuring the properties of atmospheric gravity waves (GW) as a function of wave intrinsic frequency. Here we devise a quasi-analytic method of investigating the SPB response to GW motions. It is shown that the results agree well with more rigorous numerical simulations of balloon motions and provide a better understanding of the response of SPB to GW, especially at high frequencies. The methodology is applied to ascertain the accuracy of GW studies using 12 m diameter SPB deployed in the 2010 Concordiasi campaign in the Antarctic. In comparison with the situation in earlier campaigns, the vertical displacements of the SPB were measured directly using GPS. It is shown using a large number of Monte Carlo-type simulations with realistic instrumental noise that important wave parameters, such as momentum flux, phase speed and wavelengths, can be retrieved with good accuracy from SPB observations for intrinsic wave periods greater than ca. 10 min. The noise floor for momentum flux is estimated to be ca. 10⁻⁴ mPa.2012-12-31T13:30:00ZMultiple UAVs path planning algorithms: a comparative studySathyaraj, B.M.Jain, L.C.Finn, A.Drake, S.http://hdl.handle.net/2440/847232014-08-27T23:42:54Z2007-12-31T13:30:00ZTitle: Multiple UAVs path planning algorithms: a comparative study
Author: Sathyaraj, B.M.; Jain, L.C.; Finn, A.; Drake, S.
Abstract: Unmanned aerial vehicles (UAVs) are used in team for detecting targets and keeping them in its sensor range. There are various algorithms available for searching and monitoring targets. The complexity of the search algorithm increases if the number of nodes is increased. This paper focuses on multi UAVs path planning and Path Finding algorithms. Number of Path Finding and Search algorithms was applied to various environments, and their performance compared. The number of searches and also the computation time increases as the number of nodes increases. The various algorithms studied are Dijkstra’s algorithm, Bellman Ford’s algorithm, Floyd-Warshall’s algorithm and the AStar algorithm. These search algorithms were compared. The results show that the AStar algorithm performed better than the other search algorithms. These path finding algorithms were compared so that a path for communication can be established and monitored.2007-12-31T13:30:00ZA hybrid boundary element-finite element approach to modeling plane wave 3D electromagnetic induction responses in the EarthRen, Z.Kalscheuer, T.Greenhalgh, S.Maurer, H.http://hdl.handle.net/2440/847132014-08-27T23:17:50Z2013-12-31T13:30:00ZTitle: A hybrid boundary element-finite element approach to modeling plane wave 3D electromagnetic induction responses in the Earth
Author: Ren, Z.; Kalscheuer, T.; Greenhalgh, S.; Maurer, H.2013-12-31T13:30:00Z