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Energetic Path Finding across Massive Terrain Data [chapter]

Andrew Tsui, Zoë Wood
2009 Lecture Notes in Computer Science  
Energetic Path Finding Across Massive Terrain Data Andrew Tsui Before there were airplanes, cars, trains, boats, or bicycles, the primary means of transportation was on foot.  ...  To accomplish this, various graph simplification and path approximation algorithms are explored to construct a real-time path finding algorithm.  ...  The later point is the reason for the application of PRM's to the task of finding energetic paths across massive data.  ... 
doi:10.1007/978-3-642-10520-3_84 fatcat:lvdd3z4nprd6xfxxd2j6du6nn4

Europa's disk-resolved ultraviolet spectra: Relationships with plasma flux and surface terrains

Amanda R. Hendrix, Timothy A. Cassidy, Robert E. Johnson, Chris Paranicas, Robert W. Carlson
2011 Icarus (New York, N.Y. 1962)  
The full set of high-resolution observations from the Galileo Ultraviolet Spectrometer (UVS) is analyzed to look for spectral trends across the surface of Europa.  ...  Like the SO 2 absorption, the near UV albedo also has local variations that depend on terrain type and age.  ...  This work was supported by the Jupiter System Data Analysis Program and the Planetary Geology and Geophysics Program.  ... 
doi:10.1016/j.icarus.2011.01.023 fatcat:mj4zjkxw4zanvgg3vk4qrridem

Estimating updraft velocity components over large spatial scales: contrasting migration strategies of golden eagles and turkey vultures

Gil Bohrer, David Brandes, James T. Mandel, Keith L. Bildstein, Tricia A. Miller, Michael Lanzone, Todd Katzner, Charles Maisonneuve, Junior A. Tremblay
2011 Ecology Letters  
Soaring birds migrate in massive numbers worldwide.  ...  methods to contrast flight strategies of two morphologically similar but behaviourally different species: golden eagle, Aquila chrysaetos, and turkey vulture, Cathartes aura, during autumn migration across  ...  Any opinions, findings, and conclusions expressed in this material are those of the authors and do not reflect the views of the NSF.  ... 
doi:10.1111/j.1461-0248.2011.01713.x pmid:22077120 fatcat:z5vne6skhjh7za7szhsmmwsdcm

Analysis of Voyager images of Europa: Plasma bombardment

R.E. Johnson, M.L. Nelson, T.B. McCord, J.C. Gradie
1988 Icarus (New York, N.Y. 1962)  
A generally "red" spectrum is found in both terrain types which is, very roughly, constant across the surface.  ...  The data taken through all of the filters (0.35, 0.41, 0.48, 0.59 pm) exhibit a longitudinal dependence across the surface of Europa predicted by the grain size variation determined previously from the  ...  We find an absorption in the U~¢ (0.35 + 0.03 ~m) Voyager data which occurs at a different wavelength than the absorption band (0.28 -+ 0.04/zm) observed by Lane et al. (1981) .  ... 
doi:10.1016/0019-1035(88)90155-8 fatcat:fogex6zt2ngmxikzc7ekx73wdq

NOC-MSM/SEAsia: SEAsia [article]

Jeff Polton, James Harle, Michela de Dominicis, Anna Katavouta
2022 Zenodo  
A short-coming of these terrain following coordinates is that the vertical and horizontal pressure gradients are no longer cleanly separated across the cells of the numerical grid.  ...  Massively Parallel Processing ("key_mpp_mpi") !- nn_itend = 7200 !  ... 
doi:10.5281/zenodo.6483231 fatcat:frswuneslzhyzbt2pxxcyvfsry

Principles and Patterns of Bat Movements: From Aerodynamics to Ecology

Christian C. Voigt, Winifred F. Frick, Marc W. Holderied, Richard Holland, Gerald Kerth, Marco A. R. Mello, Raina K. Plowright, Sharon Swartz, Yossi Yovel
2017 The Quarterly review of biology  
capacity of most bats is dominated by the echolocation system, yet other sensory modalities, including an iron-based magnetic sense, may contribute to navigation depending on a bat's familiarity with the terrain  ...  We note, however, that the described schemes are massively simplified.  ...  Flight paths that deviate from the linear trajectories tested in the laboratory, such as in a cluttered habitat, may add substantial energetic costs to flying bats (Voigt et al. 2010a) .  ... 
doi:10.1086/693847 pmid:29861509 pmcid:PMC5983048 fatcat:tsbuk3gdgvdkzilnl44dysvcxq

Catalytic self-folding of 2D structures through cascading magnet reactions

Emily J. Southern, Valentin Besnard, Bastien Lahaye, Andy M. Tyrrell, Shuhei Miyashita
2019 Royal Society Open Science  
Each tile holds two magnets contained in paths designed to control their interactions.  ...  Once initiated by a magnetic unit (termed Catalyst), the chain self-reconfigures by consuming magnetic potential energy stored between magnet pairs, until the final 2D structure is reached at an energetic  ...  This can be pictured as a funnel-shaped energetic profile with the native state at the end of its spout, rather than a soup plate-shaped terrain with several states at a similar energetic level [42] .  ... 
doi:10.1098/rsos.182128 pmid:31417701 pmcid:PMC6689604 fatcat:f4cp5zhaovf7jbj7244q5xmeie

Parallel Complementary Strategies for Implementing Biological Principles into Mobile Robots

Roger D. Quinn, Gabriel M. Nelson, Richard J. Bachmann, Daniel A. Kingsley, John T. Offi, Thomas J. Allen, Roy E. Ritzmann
2003 The international journal of robotics research  
Our goal is to use intelligent biological inspiration to develop robots that capture the capacity of animals to traverse complex terrain.  ...  Stick insects and locusts use the searching reflex to cycle their legs to find a foothold. Robot II used its three DoF legs to perform this behavior and walk across slatted surfaces.  ...  a closed path in joint-space.  ... 
doi:10.1177/0278364903022003003 fatcat:gljv5a6i6vazdlh4f7zufnjew4

Cost-Efficient Global Robot Navigation in Rugged Off-Road Terrain

T. Braun
2011 Künstliche Intelligenz  
, but also cost-efficient, e.g. able to generate navigation paths which optimize a cost measure closely related to terrain traversability.  ...  Abstract This thesis addresses the problem of finding a global robot navigation strategy for rugged off-road terrain which is robust against inaccurate self-localization and scalable to large environments  ...  Finding the 'most suitable' path then amounts to a search for the path from start to end node which minimizes the path cost.  ... 
doi:10.1007/s13218-011-0088-9 fatcat:u4ssainmcvc3jmqdon6gpjg674

Evidence of erosional self-channelization of pyroclastic density currents revealed by ground-penetrating radar imaging at Mount St. Helens, Washington (USA)

Andrew C. Gase, Brittany D. Brand, John H. Bradford
2017 Geophysical Research Letters  
These findings are the first direct evidence of erosional self-channelization by PDCs, a phenomenon that may increase flow velocity and runout distance through confinement and substrate erosion.  ...  Simultaneously, we recorded real-time kinematic GPS data for topographic correction. Generally, we could image within Units II-V (∼20 m deep).  ...  Raw and processed data are archived at data-downloads/.  ... 
doi:10.1002/2016gl072178 fatcat:fgxmcdsccnaatpks2gvhfcp3aq

Development (of Walking): 15 Suggestions

Karen E. Adolph, Justine E. Hoch, Whitney G. Cole
2018 Trends in Cognitive Sciences  
Variable trajectories hold regardless of the criterion for onset (first step, five consecutive steps, walking across the room, etc.).  ...  The difficulty arises in generalizing beyond the specific details of the particular behavior in question to concepts, methods, and theories that hold across content domains.  ...  Albeit massive, infants' practice regimen is not a continuous marathon. It looks nothing like a straight, uniform path.  ... 
doi:10.1016/j.tics.2018.05.010 pmid:30032744 pmcid:PMC6145857 fatcat:d4refl6rzrfuhjdqmovhorezpa

Resource Selection by an Endangered Ungulate: A Test of Predator-Induced Range Abandonment

Jeffrey T. Villepique, Becky M. Pierce, Vernon C. Bleich, Aleksandra Andic, R. Terry Bowyer
2015 Advances in Ecology  
areas of high solar radiation, a correlate of vegetation productivity, where risk of predation by mountain lions was greatest, while mitigating indirect risk of predation by selecting for steep, rugged terrain  ...  Rock cover was associated with steep escape terrain used by bighorn sheep in our study area but also included massive granitic plutons, favored by human technical rock climbers, which were too steep  ...  NDSI from TM image (Path 42, Row 34). and exceptionally variable (CV = 73%) during 2002-2007, when GPS data were collected from collared bighorn sheep (Figure 9).  ... 
doi:10.1155/2015/357080 fatcat:7vkjnb7b6ffcbb6xzmnx3wxkbq

On the Habitability and Future Exploration of Ocean Worlds

K. P. Hand, C. Sotin, A. Hayes, A. Coustenis
2020 Space Science Reviews  
Nevertheless, the Cassini data indicates otherwise.  ...  The path forward for the systematic exploration of ocean worlds could also benefit greatly from such a coupling.  ... 
doi:10.1007/s11214-020-00713-7 fatcat:xcmuh5gs3neyvorjar3jnmtefm

The 2017 Rigopiano Avalanche—Dynamics Inferred from Field Observations

Dieter Issler
2020 Geosciences  
run no farther than the β-point of their respective paths during the same period.  ...  Data on the disastrous snow avalanche that occurred on 18 January 2017 at the spa hotel Rigopiano, municipality of Farindola in the Abruzzo region of central Italy, are analyzed in different ways.  ...  Jan-Thomas Fischer shared the notes of a survey by an Austrian team during the rescue operations and Betty Sovilla helped finding a digital terrain model.  ... 
doi:10.3390/geosciences10110466 fatcat:pfn7m53ew5c6vd6usfos6th6fu

Characterisation of erosional features associated with tsunami terrains on rocky coasts of the Maltese islands

Derek N. Mottershead, Malcolm J. Bray, Philip J. Soar, Paul J. Farres
2015 Earth Surface Processes and Landforms  
Sockets, eroded scarps, scoured terrains, clifftop erosion scars, swept terrains and spillways are interpreted as consequences of overwashing of the landscape by an extreme wave or waves.  ...  They comprise the source areas for associated depositional evidence allowing transport paths to be estimated, and may significantly enhance the reconstruction of extreme wave events.  ...  and swept terrains that simply require transport of rock debris and/or soil across a ramp.  ... 
doi:10.1002/esp.3784 fatcat:77tioqujefettbvronq6xu7qxy
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