Results 51 to 60 of about 51,955 (162)

Minimizing Distance-to-Sight in Polygonal Domains.

open access: yes, 2018
In this paper, we consider the quickest pair-visibility problem in polygonal domains. Given two points in a polygonal domain with h holes of total complexity n, we want to minimize the maximum distance that the two points travel in order to see each other in the polygonal domain.
openaire   +4 more sources

Response distances of wild forest reindeer (Rangifer tarandus fennicus Lönnb.) and semi-domestic reindeer (R. t. tarandus L.) to direct provocation by a human on foot/snowshoes

open access: yesRangifer, 2013
The objective of the study was to examine response distances of wild forest reindeer (Rangifer tarandus fennicus Lönnb.) and semi-domestic reindeer (R. t.
Mauri Nieminen
doaj   +1 more source

Application of non line-of-sight error suppression method in mine target locatio

open access: yesGong-kuang zidonghua, 2015
It was analyzed and pointed out that distance ranging error caused by non line-of-sight transmission delay of electromagnetic wave was the main reason of reducing mine location precision.
TIAN Zijian   +3 more
doaj   +1 more source

Rural Roads’ Passing Sight Distance Control Along Crest Vertical Curves

open access: yesInfrastructures
Passing sight distance (PSD) is a vital design element that directly imposes economic, as well as safety and operational, considerations. The provision of PSD is highly prioritized, at least for rural road sections without additional passing lanes.
Stergios Mavromatis   +3 more
doaj   +1 more source

Analysis of sight distance at an at-grade intersection

open access: yesRoad and Rail Infrastructure IV, 2016
Maneuvering distance and stopping sight distance are important traffic safety elements at an at-grade intersection. Croatian official standard for sight distance calculation (HRN.U.C4.050) dates from 1990. This regulation treats sight distance values in a very simplified way.
Ban, Ivana   +3 more
openaire   +2 more sources

Calculation Model for the Exit Decision Sight Distance of Right-Turn Ramps on the Left at Interchange

open access: yesApplied Sciences
Given the rapid construction of freeways in developing countries such as China, land use is constantly under strict constraints, leading to challenges in adopting conventional layouts for interchanges.
Zhipeng Fu   +4 more
doaj   +1 more source

Research on the length of passing distance in the real traffic flow

open access: yesGrađevinar, 2014
This paper presents research and analysis of the length of passing distance in the real traffic flow on the sections of two-way two-lane roads. Values of passing sight distance recommended by road design rulebooks and recommendations are often not ...
Biljana Ivanović   +2 more
doaj   +1 more source

Analytical Model for Passing Sight Distance Design Criteria of Two-Lane Roads in Sri Lanka

open access: yesTransport and Telecommunication, 2018
For a safe overtaking manoeuvre on two-lane highways, drivers need a sufficient sight distance along the roadway, but it depends on the traffic environment.
Mampearachchi W. K., Masakorala S. R.
doaj   +1 more source

Estimating Drone Visual Line-of-Sight Distance Using Machine Learning Approaches

open access: yesAerospace
In this study, we conducted flight tests to establish a clear standard for the visual line-of-sight (VLOS) distance of drones using machine learning models, as outlined in the Aviation Safety Act. Various machine learning models were applied and compared
Gyoubeom Kim   +5 more
doaj   +1 more source

Ordinal Probit Modeling of Injury Severity Risks at Visually Obstructed Intersections with Bootstrap Validation

open access: yesModelling
Road intersection crashes remain a major contributor to injuries due to complex conflict patterns and multimodal interactions. Among the factors influencing intersection safety, inadequate intersection sight distance (ISD) attributed to roadside sight ...
Irfan Ullah   +2 more
doaj   +1 more source

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