255 research outputs found
10491 Results of the break-out group: Gulls Data
No full textA classification of gull behaviour was produced by the group, led by domain
expert Emiel van Loon, who provided additional context including that gull trips
are typically composed of distinct segments, that gull trips are rarely single
purpose, and that there is very little diurnal pattern to activities. The
classification produced is not intended to be complete, or non overlapping.
Furthermore, the group considered how the attributes in the gulls dataset could be used in algorithms to automatically classify the dataset into distinct spatial
patterns, and associate this with gull behaviours
Data and analysis script for analysing temporal patterns in bird abundance on the North Sea
No full textData and analysis script used for manuscript: Temporal patterns in offshore bird
abundance during the breeding season at the Dutch North Sea coast by Jens
A. van Erp, E. Emiel van Loon, Kees
(C.) J. Camphuysen, Judy Shamoun-Baranes. Metadata.docx describes each individual data file. Script requires RStudio and listed libraries to run
Representation, Analysis and Visualization of Moving Objects (Dagstuhl Seminar 12512)
Full text linkFrom December 16 to December 21, 2012, the Dagstuhl Seminar 12512 "Representation, Analysis and Visualization of Moving Objects" was held in Schloss Dagstuhl -- Leibniz Center for Informatics. The major goal of this seminar was to bring together the diverse and fast growing, research community that is involved in developing better computational techniques for spatio-temporal object representation, data mining, and visualization of moving object data. The participants included experts from fields such as computational geometry, data mining, visual analytics, GIS science, urban planning and movement ecology. Most of the participants came from academic institutions but some also from government agencies and industry. The seminar has led to a fruitful exchange of ideas between different disciplines, to the creation of new interdisciplinary collaborations and to recommendations for future research directions. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper
10491 Results of the break-out group: Benchmarking
No full textThis working group has discussed the possibilities to start developing benchmarking tools for algorithms to analyse movement data. Many basic properties of movement data and derived products from these data are not clearly defined. In addition, analysis algorithms vary with respect to input as well as output data. As a result, it is difficult to evaluate the suitability of different algorithms for application to a given type of data and question. We think there is a need to define clear tests or experiments for this purpose
Data and analysis scripts for Thermal soaring over the North Sea and implications for wind farm interactions
No full textData and analysis scripts used for manuscript: Thermal soaring over the North Sea and implications for wind farm interactions by Jens A. van Erp, Elspeth Sage, Willem Bouten, E. Emiel van Loon, Kees (C.) J. Camphuysen, Judy Shamoun-Baranes. “File description.docx” describes each individual data file. The scripts require RStudio and listed libraries to run.van Erp* J, Sage* E, Bouten W, van Loon E, Camphuysen KCJ, Shamoun-Baranes J, 2023. Thermal soaring over the North Sea and implications for wind farm interactions. Marine Ecology Progress Series 723:185-200. doi: https://doi.org/10.3354/meps14315.*joint first author
Data and analysis script for analysing temporal patterns in bird abundance on the North Sea
No full textData and analysis script used for manuscript: Temporal patterns in offshore bird
abundance during the breeding season at the Dutch North Sea coast by Jens
A. van Erp, E. Emiel van Loon, Kees
(C.) J. Camphuysen, Judy Shamoun-Baranes. Metadata.docx describes each individual data file. Script requires RStudio and listed libraries to run
A Small-Scale Analysis of Elevational Species Richness and Beta Diversity Patterns of Arthropods on an Oceanic Island (Terceira, Azores)
Full text linkWe present an analysis of arthropod diversity patterns in native forest communities along the small elevation gradient (0–1021 m a.s.l.) of Terceira island, Azores (Portugal). We analysed (1) how the alpha diversity of Azorean arthropods responds to increasing elevation and (2) differs between endemic, native non-endemic and introduced (alien) species, and (3) the contributions of species replacement and richness difference to beta diversity. Arthropods were sampled using SLAM traps between 2014 and 2018. We analysed species richness indicators, the Hill series and beta diversity partitioning (species replacement and species richness differences). Selected orders (Araneae, Coleoptera, Hemiptera and Psocoptera) and endemic, native non-endemic and introduced species were analysed separately. Total species richness shows a monotonic decrease with elevation for all species and Coleoptera and Psocoptera, but peaks at mid-high elevation for Araneae and endemic species. Introduced species richness decreases strongly with elevation especially. These patterns are most likely driven by climatic factors but also influenced by human disturbance. Beta diversity is, for most groups, the main component of total (gamma) diversity along the gradient but shows no relation with elevation. It results from a combined effect of richness decrease with elevation and species replacement in groups with many narrow-ranged species.A large number of students (see below in Acknowledgments financed by the EU Programs ERASMUS and EURODYSSÉE sorted the samples prior to species assignment by one of us (PB): Data acquisition was also partly financed by Portuguese National Funds, through FCT — Fundação para a Ciência e a Tecnología, within the project UID/BIA/00329/2013, 2015–2018 and UID/BIA/00329/2019–2024 and Portuguese FCT-NETBIOME—ISLANDBIODIV grant 0003/2011. Data open availability and manuscript Open Access were funded by FEDER at 85% and Azorean Public funds at 15% through Operational Program Azores 2020, under the project AZORESBIOPORTAL–PORBIOTA (ACORES-01-0145-FEDER-000072).info:eu-repo/semantics/publishedVersio
10491 Abstracts Collection – Representation, Analysis and Visualization of Moving Objects
Full text linkFrom December 5 to December 10, 2010, the Dagstuhl Seminar 10491
``Representation, Analysis and Visualization of Moving Objects'' was held
in Schloss Dagstuhl~--~Leibniz Center for Informatics.
The major goal of this seminar has been to bring together the diverse and fast
growing, research community that is involved in developing better computational
techniques for spatio-temporal object representation, data mining, and
visualization massive amounts of moving object data.
The participants included experts from fields such as computational geometry, data mining, visual analytics, GIS science, transportation science, urban planning and movement ecology. Most of the participants came from academic institutions, some from government agencies and industry. The seminar has led to a fruitful exchange of ideas between different disciplines, to the creation of new interdisciplinary collaborations, concrete plans for a data challenge in an upcoming conference, and to recommendations for future research directions.
Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper
10491 Summary – Representation, Analysis and Visualization of Moving Objects
Full text linkThis seminar is a successor to the Representation, Analysis and Visualization of Moving Objects seminar in 2008 (seminar 08451). The major goal has been to bring together the diverse and fast growing, research community that is involved in developing better computational techniques for spatio-temporal object representation, data mining, and visualization of massive amounts of moving object data. The participants included experts from fields such as computational geometry, data mining, visual analytics, GIS science, transportation science, urban planning and movement ecology. Most of the participants came from academic institutions, some from government agencies and industry. The seminar has led to a fruitful exchange of ideas between different disciplines, to the creation of new interdisciplinary collaborations, concrete plans for a data challenge in an upcoming conference, and to recommendations for future research directions
Music production and its role in coalition signaling during foraging contexts in a hunter-gatherer society
Full text linkMusic is a cultural activity universally present in all human societies. Several hypotheses have been formulated to understand the possible origins of music and the reasons for its emergence. Here, we test two hypotheses: (1) the coalition signaling hypothesis which posits that music could have emerged as a tool to signal cooperative intent and signal strength of alliances and (2) music as a strategy to deter potential predators. In addition, we further explore the link between tactile cues and the propensity of mothers to sing toward infants. For this, we investigated the singing behaviors of hunter-gatherer mothers during daily foraging trips among the Mbendjele BaYaka in the Republic of the Congo. Although singing is a significant component of their daily activities, such as when walking in the forest or collecting food sources, studies on human music production in hunter-gatherer societies are mostly conducted during their ritual ceremonies. In this study, we collected foraging and singing behavioral data of mothers by using focal follows of five BaYaka women during their foraging trips in the forest. In accordance with our predictions for the coalition signaling hypothesis, women were more likely to sing when present in large groups, especially when group members were less familiar. However, predictions of the predation deterrence hypothesis were not supported as the interaction between group size and distance from the village did not have a significant effect on the likelihood of singing. The latter may be due to limited variation in predation risk in the foraging areas, because of the intense bush meat trade, and hence, future studies should include foraging areas with higher densities of wild animals. Lastly, we found that mothers were more likely to sing when they were carrying infants compared to when infants were close, but carried by others, supporting the prediction that touch plays an important prerequisite role in musical interaction between the mother and child. Our study provides important insight into the role of music as a tool in displaying the intent between or within groups to strengthen potentially conflict-free alliances during joint foraging activities. Copyright © 2023 Chittar, Jang, Samuni, Lewis, Honing, Loon and Janmaat
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