Results 21 to 30 of about 1,228,198 (294)
Three-Dimensional Stopping Sight Distance Calculation Method under High Slope Restraint
Applied Sciences, 2020 Sight distance is an important indicator to ensure the safety of drivers, and is also an indispensable evaluation basis in highway safety engineering.
Yonghong Yang +3 more
doaj +1 more source
Mobile capture of remote points of interest using line of sight modelling [PDF]
Computers & Geosciences, 2013 Recording points of interest using GPS whilst working in the field is an established technique in geographical fieldwork, where the user’s current position is used as the spatial reference to be captured; this is known as geo-tagging. We outline the development and evaluation of a smartphone application called Zapp that enables geo-tagging of any ...
Meek, Sam +3 more
openaire +1 more source
Dynamic non-line-of-sight imaging system based on the optimization of point spread functions [PDF]
Optics Express, 2021 Non-line-of-sight (NLOS) imaging reveals hidden objects reflected from diffusing surfaces or behind scattering media. NLOS reconstruction is usually achieved by computational deconvolution of time-resolved transient data from a scanning single-photon avalanche diode (SPAD) detection system.
Chengquan Pei +8 more
openaire +3 more sources
WiFi Access Points Line-of-Sight Detection for Indoor Positioning Using the Signal Round Trip Time
Remote Sensing, 2022 The emerging WiFi Round Trip Time measured by the IEEE 802.11mc standard promised sub-meter-level accuracy for WiFi-based indoor positioning systems, under the assumption of an ideal line-of-sight path to the user. However, most workplaces with furniture
Xu Feng, Khuong An Nguyen, Zhiyuan Luo
doaj +1 more source
The Zeldovich approximation and wide-angle redshift-space distortions [PDF]
, 2018 The contribution of line-of-sight peculiar velocities to the observed redshift of objects breaks the translational symmetry of the underlying theory, modifying the predicted 2-point functions.
Castorina, Emanuele, White, Martin
core +2 more sources
The Intensity Matching Approach: A Tractable Stochastic Geometry Approximation to System-Level Analysis of Cellular Networks [PDF]
, 2016 The intensity matching approach for tractable performance evaluation and optimization of cellular networks is introduced. It assumes that the base stations are modeled as points of a Poisson point process and leverages stochastic geometry for system ...
Di Renzo, Marco, Guan, Peng, Lu, Wei
core +2 more sources
Remote Sensing, 2019 The safe and efficient operation of highways largely depends on the adequate provision of sight distance. Small unmanned aerial vehicles (UAVs) can be utilized to efficiently complete data acquisition very soon after identifying an issue when searching ...
Luis Iglesias +3 more
doaj +1 more source
Underground positioning method of single base station DOA and TOA based on single reflectio
Gong-kuang zidonghua, 2015 In view of problem of big error in underground single base station positioning system due to wireless signal influenced by multipath effect and non-line of sight, a joint estimation positioning method of DOA and TOA based on single reflection was ...
HUANG Kai +3 more
doaj +1 more source
GIScience & Remote Sensing, 2021 Adequate sight distances are crucial parameters ruling the design of roads and riding facilities. LiDAR-retrieved data have proved to serve many transportation applications by creating updated and accurate representations of the road environment.
Keila González-Gómez +2 more
doaj +1 more source
Performance Studies from a short-sighted point of view
Mantichora, 2020 What is Performance Studies? What is Performance? What is the role of a fieldworker trying to understand what Performance Studies does? This is a brief consideration related to a wider attempt of approaching the phenomenon of Performance Studies "as performance", studying it through the methodological lens of the field itself. A work in progress for a "
openaire +2 more sources