Evidence map›Paper›PMID 30355809›Full record

ArticleJournal of the Royal Society, Interface2018

Simultaneous measurements of three-dimensional trajectories and wingbeat frequencies of birds in the field.

Hangjian Ling, Guillam E Mclvor, Geoff Nagy, Sepehr MohaimenianPour, Richard T Vaughan, Alex Thornton, Nicholas T Ouellette

Abstract read
In one paragraph

Article in Journal of the Royal Society, Interface, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Hangjian LingDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA.ORCID 0000-0001-9014-7126
Guillam E MclvorCentre for Ecology and Conservation, University of Exeter, Penryn, UK.ORCID 0000-0003-3922-7651
Geoff NagySchool of Computing Science, Simon Fraser University, Burnaby, Canada.
Sepehr MohaimenianPourSchool of Computing Science, Simon Fraser University, Burnaby, Canada.
Richard T VaughanSchool of Computing Science, Simon Fraser University, Burnaby, Canada.
Alex ThorntonCentre for Ecology and Conservation, University of Exeter, Penryn, UK.
Nicholas T OuelletteDepartment of Civil and Environmental Engineering, Stanford University, Stanford, CA, USA nto@stanford.edu.ORCID 0000-0002-5172-0361

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tracking the movements of birds in three dimensions is integral to a wide range of problems in animal ecology, behaviour and cognition. Multi-camera stereo-imaging has been used to track the three-dimensional (3D) motion of birds in dense flocks, but precise localization of birds remains a challenge due to imaging resolution in the depth direction and optical occlusion. This paper introduces a portable stereo-imaging system with improved accuracy and a simple stereo-matching algorithm that can resolve optical occlusion. This system allows us to decouple body and wing motion, and thus measure not only velocities and accelerations but also wingbeat frequencies along the 3D trajectories of birds. We demonstrate these new methods by analysing six flocking events consisting of 50 to 360 jackdaws (

Indexed as

AnimalsBiomechanical PhenomenaCrowsFlight, AnimalWings, Animalanimal movementavian flightcollective behaviourcorvidsstereo-imagingthree-dimensional tracking

Identifiers

PMID30355809
PMCPMC6228479

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.