Semantic Understanding of Spatial Trajectories

2017 ◽  
pp. 398-401 ◽  
Author(s):  
Zhenhui Li
Keyword(s):  
Spatial Trajectories

scholarly journals An Agent-Specific Stochastic Model of Generalized Reaching Task Difficulty

2021 ◽  
Vol 11 (10) ◽  
pp. 4330
Author(s):  
Andrea Lucchese ◽  
Salvatore Digiesi ◽  
Kübra Akbaş ◽  
Carlotta Mummolo
Keyword(s):  
Stochastic Model ◽  
Task Difficulty ◽  
Motor Task ◽  
Younger Adults ◽  
Reaching Task ◽  
Index Of Difficulty ◽  
Young Subjects ◽  
Aged Subjects ◽  
Spatial Trajectories ◽  
Repetitive Motor

The ability of an agent to accomplish a trajectory during a certain motor task depends on the fit between external (environment) and internal (agent) constraints, also known as affordance. A model of difficulty for a generalized reaching motor task is proposed as an affordance-related measure, as perceived by a specific agent for a given environment and task. By extending the information-based Index of Difficulty of a trajectory, a stochastic model of difficulty is formulated based on the observed variability of spatial trajectories executed by a given agent during a repetitive motor task. The model is tested on an experimental walking dataset available in the literature, where the repetitive stride movement of differently aged subjects (14 “old” subjects aged 50–73; 20 “young” subjects aged 21–37) at multiple speed conditions (comfortable, ~30% faster, ~30% slower) is analyzed. Reduced trajectory variability in older as compared to younger adults results in a higher Index of Difficulty (slower: +24%, p < 0.0125; faster: +38%, p < 0.002) which is interpreted in this context as reduced affordance. The model overcomes the limits of existing difficulty measures by capturing the stochastic dependency of task difficulty on a subject’s age and average speed. This model provides a benchmarking tool for motor performance in biomechanics and ergonomics applications.

scholarly journals Classifying spatial trajectories using representation learning

2016 ◽  
Vol 2 (3-4) ◽  
pp. 107-117 ◽  
Author(s):  
Yuki Endo ◽  
Hiroyuki Toda ◽  
Kyosuke Nishida ◽  
Jotaro Ikedo
Keyword(s):  
Representation Learning ◽  
Spatial Trajectories

Privacy of Spatial Trajectories

2011 ◽  
pp. 109-141 ◽  
Author(s):  
Chi-Yin Chow ◽  
Mohemad F. Mokbel
Keyword(s):  
Spatial Trajectories

The Traj2Vec model to quantify residents’ spatial trajectories and estimate the proportions of urban land-use types

2020 ◽  
Vol 35 (1) ◽  
pp. 193-211
Author(s):  
Jinbao Zhang ◽  
Xia Li ◽  
Yao Yao ◽  
Ye Hong ◽  
Jialyu He ◽  
...  
Keyword(s):  
Land Use ◽  
Urban Land ◽  
Urban Land Use ◽  
Land Use Types ◽  
Spatial Trajectories

The intimate-mobility entanglement: Subaltern trajectories in the Haitian-Dominican borderlands

2020 ◽  
pp. 239965442093072
Author(s):  
Masaya Llavaneras Blanco
Keyword(s):  
Participant Observation ◽  
Border Crossing ◽  
Intimate Violence ◽  
Domestic Worker ◽  
Individual Interviews ◽  
The One ◽  
The Right ◽  
Relationship Of ◽  
Spatial Trajectories ◽  
The Way

This article argues that intimacy and human (im)mobilities are interrelated, and that this relationship is integral to the way borders function and are experienced. I propose the concept of intimate-mobility entanglement to describe this relationship of interdependence. Based on primary research conducted with Haitian domestic workers that work in the Dominican Republic (DR), the article illustrates how intimate labour functions as a driver and a strategy for human (im)mobility. The article characterizes the interactions between (im)mobility and intimacy as a relationship of entanglement that is observable in domestic work, childrearing, intimate violence, border crossing and access to the right to nationality. The article centers on the spatial trajectory of Marie, a Haitian woman who works as a domestic worker in a Dominican border town after having lived and worked in several towns in the DR for twenty years. Marie’s spatial trajectories illuminate how the intimate-mobility entanglement is integral to the Dominican border regime. Through individual interviews, participant observation and mapping Marie’s journeys through Haitian and Dominican territories, the article revisits her spatial trajectories and sheds light on the dual relationship between the intimate-mobility entanglement and the border regime. On the one hand, the entanglement intervenes in the way the border is reinforced in the actual border strip while it also stretches out into Dominican territory. On the other, the border regime conditions Marie’s labour, how she moves and settles down, and influences how intimate labours are carried out and experienced. Building on a tradition of feminist and subaltern geographies, as well as on mobilities literature, the article presents a contextualized analysis of the politics of subaltern mobilities and explains how intimacy and intimate labours are critical aspects of how borders work.

scholarly journals Spatial trajectories in early life: Moving on or returning home?

2019 ◽  
Vol 25 (7) ◽  
Author(s):  
Aslan Zorlu ◽  
Niels Kooiman
Keyword(s):  
Early Life ◽  
Returning Home ◽  
Spatial Trajectories
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