The #purpose of invoking the notion of “purpose” is to emphasize the irrelevance of the #trajectories traced by such a system en route from an arbitrary initial #state to its #goal. In a synthesized system whose inner workings are known, this irrelevance has no significance. This irrelevance becomes highly significant, however when the analytic problem, the machine identification problem, cannot be solved, because, for instance, it is trans-computational in the sense that with known algorithms the number of elementary computations exceeds the age of the universe expressed in nanoseconds.

From #H_v_Foerster’s definition of CYBERNETICS in the Encyclopedia of Artificial Intelligence, Wiley, 1987, as presented in:

https://apps.dtic.mil/sti/tr/pdf/ADA171072.pdf

Is persistent anxiety and depression in childhood a one-way road to adverse outcomes in adulthood? https://www.nationalelfservice.net/?p=173077

In her latest blog, Laura Hankey summarises a longitudinal study using ALSPAC data that explored associations between anxiety, depression, and comorbid anxiety/depression in childhood and adverse outcomes in young adulthood.

#YouthMentalHealth #Anxiety #Depression #Childhood #Adulthood #Trajectories

The backward #Trajectories for #Sicily clearly show how the air is trapped in the broad circulation of the anticyclone, descending as if in a swirl and heating.

#Heatwave
#Heatdome

Learning Energy Conserving Dynamics Efficiently with Hamiltonian Gaussian Processes

Magnus Ross, Markus Heinonen

https://openreview.net/forum?id=DHEZuKStzH

#hamiltonian #trajectories #gaussian

New paper: Detecting spatiotemporal propagation patterns of traffic congestion from fine-grained vehicle trajectory data by Xiong et al. #ijgis #trajectories #GPS
https://www.tandfonline.com/doi/full/10.1080/13658816.2023.2178653?src=

New paper: Assessing compression algorithms to improve the efficiency of clustering analysis on AIS vessel trajectories by Dais Ferreira M et al.

https://www.tandfonline.com/doi/full/10.1080/13658816.2022.2163494?src=

#ijgis #AIS #trajectories #MovementAnalytics

TITRATED: Learned Human Driving Behavior without Infractions via Amortized Inference

Vasileios Lioutas, Adam Scibior, Frank Wood

https://openreview.net/forum?id=M8D5iZsnrO

#driving #trajectories #autonomous

TIL about #ReconTraj4Drones: A Framework for the Reconstruction and #SemanticModeling of #UAV #Trajectories based on #MovingPandas https://www.mdpi.com/2076-3417/13/1/670

Still have to read the paper but it's great to know that @movingpandas is useful for others

#GIScience #GISChat #OpenSource #ScientificSoftware

Contrasted #successional #trajectories in a #Mediterranean #wetland due to geomorphic- and human-induced #perturbations https://dx.doi.org/10.1007/s10021-022-00780-7 #IMBEpapers @ElodieBrisset

@IvanSanchez wow, looks like you're onto something big here. I assume these trajectory animations would also work correctly around the date line?
#DataVisualisaton #MovementDataAnalytics #ais #trajectories

Messing about with orthogonal trajectories. #pde #orthogonal #trajectories #math

Today European Space Agency (#ESA)'s #Swarm constellation which measures Earth's magnetic field 🧭, celebrates 9 years since launch.

We used Swarm data to study #migratory #bird #navigation. We first linked Swarm data to #GPS #trajectories of migratory birds:
https://movementecologyjournal.biomedcentral.com/articles/10.1186/s40462-021-00268-4

Then we developed new models of #geomagnetic #navigation:
https://www.sciencedirect.com/science/article/pii/S157495412200139X

This is the first time anyone used data on real geomagnetic conditions to do this! And it could not have happened without Swarm.

1/5 "My home is my secret: concealing sensitive locations by context-aware trajectory truncation"
Anna Brauer et al. present a new privacy-protecting mechanism for #GPS #trajectories.
https://www.tandfonline.com/doi/full/10.1080/13658816.2022.2081694
#IJGIS #GISDay #GIScience #GISchat

Quick shout-out for an important and relevant to the moment paper in Trends in Cognitive Sciences:
'Trajectories of resilience and mental distress to global major disruptions' by Sarah K.Schäfer

2 key points:
1. 'Resilience is the most common response identified in most studies for most respondents'
2. 'Negative mental health consequences appear more significant for younger adults and less so for older adults.'

https://www.sciencedirect.com/science/article/pii/S1364661322002388

#resilience #trajectories #MentalHealth #stressor

Working with #GPS #tracking data in #PostGIS? Have a look at the #MobilityDB extension:

https://www.mobilitydb.com/

It's dedicated #MovementData types make many analyses much simpler, e.g. closest point of approach #CPA between pairs of #trajectories, here shown as shortest lines in #QGIS:

https://anitagraser.com/2022/09/30/detecting-close-encounters-using-mobilitydb-1-0/

#OSGeo #GISChat