Results 31 to 40 of about 3,385,835 (300)

Spatial models for context-aware indoor navigation systems: A survey [PDF]

, 2012
This paper surveys indoor spatial models developed for research fields ranging from mobile robot mapping, to indoor location-based services (LBS), and most recently to context-aware navigation services applied to indoor environments.
Christophe Claramunt, Imad Afyouni, Christophe, Claramunt, RAY, Cyril, Cyril Ray, AFYOUNI, Imad, CLARAMUNT, Christophe   +6 more
core   +1 more source

DIFFERENCES IN SPATIAL ORIENTATION IN CHILDREN WITH AND WITHOUT VISUAL IMPAIRMENT WITH REGARD TO AGE, GENDER AND SCHOOL ACHIEVEMENT

Human Research in Rehabilitation, 2019
The aim of the research is to examine the differences in the spatial orientation of children with and without visual impairment with regard to age, gender, and school achievement.
Ševala Tulumović, Dragica Omerćehajić, Izeta Husić-Đuzić   +2 more
doaj   +1 more source

The time course of adaptation to spatial contrast [PDF]

, 1991
We explored the buildup and decay of threshold elevation during and after adaptation to sinewave gratings in a series of experiments investigating the effects of adapting time, adapting contrast, spatial frequency and retinal eccentricity.
Harris, J. P., Georgeson, M. A., Magnussen, S., Greenlee, Mark W.   +3 more
core   +1 more source

Spatial Orientation Skill Performance with a Workshop Based on Green Infrastructure in Cities

ISPRS International Journal of Geo-Information, 2020
Better training of spatial skills of green infrastructure managers will contribute to better planning practices in this field. The professionals using geo-spatial technologies in sustainable city planning require, in their curriculum, specific training ...
Carlos Carbonell-Carrera, Jose Luis Saorin, Dámari Melián-Díaz, Stephany Hess-Medler   +3 more
doaj   +1 more source

Acta Plane—A New Reference for Virtual Orientation of Cone Beam Computed Tomography Scans: A Pilot Study

Applied Sciences, 2023
Introduction: Cone Beam Computed Tomography (CBCT) scans should be digitally oriented using a reference plane before being evaluated for patient growth and treatment outcome. Current orientation planes are usually dependent on the Porion points.
Fernanda Sanders-Mello, Luciane Macedo de Menezes, Ursula Tavares Puetter, Fabiane Azeredo, Tina Cornelia Antonieke Griekspoor, Sergio de Windt, Christos Livas, Ronald E. G. Jonkman, Frederik Reinder Rozema, Jan Harm Koolstra   +9 more
doaj   +1 more source

Two-dimensional spatial orientation relation recognition between image objects

Engineering Science and Technology, an International Journal
Recent advances in computer vision have concentrated on comprehension of the semantic features of images, particularly the spatial relations between objects—a fundamental semantic feature of visual scene understanding. This study systematically addresses
Gong Peiyong, Zheng Kai, Jiang Yi, Zhao Huixuan, Huai Honghao, Guan Ruijie   +5 more
doaj   +1 more source

CONTROLLING THE MOVEMENT OF HEXACOPTER ALONG THE INTENDED ROUTE WITH ENGINE FAILURE [PDF]

Scientific Journal of Silesian University of Technology. Series Transport
This article investigates the issue of controlling the movement of a hexacopter-type unmanned aerial vehicle around a route. The movement of the hexacopter is modeled as the motion of a rigid body, taking into account gravitational forces and aerodynamic
Gulush NABADOVA
doaj   +1 more source

Think Spatially With Game Engine

ISPRS International Journal of Geo-Information, 2020
Spatial thinking and spatial orientation skills are involved in tasks related to the recognition of landforms, mapping, spatial interpretation, and landscape analysis, and can be developed with specific training.
Carlos Carbonell-Carrera, Peri Gunalp, Jose Luis Saorin, Stephany Hess-Medler   +3 more
doaj   +1 more source

Zambian Mole-Rats: 33 Years on the Scene and What We Still Do Not Know and How We Could Learn It

Frontiers in Ecology and Evolution, 2022
This article surveys more than three decades of research on Zambian mole-rats (genus Fukomys, Bathyergidae), pointing out some unanswered questions and untested hypotheses and suggesting approaches to address them.
Hynek Burda
doaj   +1 more source

Three phosphatase families form a community: The phosphohydrolases that act upon inositol pyrophosphates

FEBS Letters, EarlyView.
Inositol pyrophosphates are energy‐rich signaling molecules that perform critical functions in cells. Three different families of phosphatases hydrolyze the β phosphate of the inositol pyrophosphate molecules: two have narrow specificities and one is promiscuous.
Ronda J. Rolfes
wiley   +1 more source