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201 results for “Controlled experiment”
Data from: Plant, soil and microbial controls on grassland diversity restoration: a long-term, multi-site mesocosm experiment
The success of grassland biodiversity restoration schemes is determined by many factors; as such their outcomes can be unpredictable. There is a need for improved understanding of the relative importance of belowground factors to restoration success, such as contrasting soil type and management intensities, as well as plant community composition and order of assembly. We carried out an eight-year mesocosm experiment across three locations in the UK to explore the relative and interactive roles of various aboveground and belowground factors in the establishment of target species, to determine general constraints on grassland restoration. Each location had a series of mesocosms with contrasting soil types and management status, which were initially sown with six grasses typical of species-poor grasslands targeted for restoration. Over five years, sets of plant species were added, to test how different vegetation treatments, including early-coloniser species and the hemiparasite Rhinanthus minor, and soil type and management, influenced the establishment of target plant species and community diversity. The addition of early-coloniser species to model grasslands suppressed the establishment of target species, indicating a strong priority effect. Soil type was also an important factor, but effects varied considerably across locations. In the absence of early-coloniser species, low soil nutrient availability improved establishment of target species across locations, although R. minor had no beneficial effect. Synthesis and applications. Our long-term, multi-site study indicates that successful restoration of species rich grassland is dependent primarily on priority effects, especially in the form of early-coloniser species that suppress establishment of slow-growing target species. We also show that priority effects vary with soil conditions, being stronger in clay than sandy soils, and on soils of high nutrient availability. As such, our work emphasises the importance of considering priority effects and local soil conditions in developing management strategies for restoring plant species diversity in grassland.
Data from: Controlled feeding experiments with diets of different abrasiveness reveal slow development of mesowear signal in goats (Capra aegagrus hircus)
Dental mesowear is applied as a proxy to determine the general diet of mammalian herbivores based on tooth-cusp shape and occlusal relief. Low, blunt cusps are considered typical for grazers and high, sharp cusps typical for browsers. However, how internal or external abrasives impact mesowear, and the time frame the wear signature takes to develop, still need to be explored. Four different pelleted diets of increasing abrasiveness (lucerne, grass, grass and rice husks, grass, rice husks and sand) were fed to four groups of a total of 28 adult goats in a controlled feeding experiment over a six-month period. Tooth morphology was captured by medical CT scans at the beginning and end of the experiment. These scans, as well as the crania obtained postmortem, were scored using the mesowear method. Comparisons between diet groups only showed few significant differences after six months, irrespective of whether CT scans or the real teeth were scored. Only when assessing the difference in signal between start and end did relevant, significant diet-specific effects emerge. Diets containing lower phytolith content caused a more pronounced change in mesowear towards sharper cusps/higher reliefs, while the feed containing sand did not result in more extreme changes in mesowear when compared to the same feed without sand. Our experiment suggests that the formation of a stable and hence reliable mesowear signal requires more time to develop than six months.
Replication package for the article "Combining STPA and BDD for Safety Analysis and Verification in Agile Development: A Controlled Experiment"
<p>This replication package includes all the instruments we used in our experiment. </p>
Figure 1. – Zingel asper specimens. A in Reproduction of Zingel asper (Linnaeus, 1758) in controlled conditions: an assessment of the experiences realized since 2005 at the Besançon Natural History Museum
Figure 1. – Zingel asper specimens. A: Lateral view Zingel asper, male, 2 year old specimen born in 2008 in Besançon Natural History Museum; B: Lateral view, 4 year old female, size of 21 cm TL (captive born 2008); C: Dorsal photo of a Z. asper group, each fish can be individually identified thanks to the black stripes on their bodies (1-6).
Data for: Evaluating Different i*-based Approaches for Selecting Functional Requirements while Balancing and Optimizing Non-Functional Requirements: A Controlled Experiment
<p>This dataset is associated with the study published in <em>Information and Software Technology</em>, Volume 106, February 2019, Pages 68-84. The study investigates the effectiveness of an alternative automated i* post-processed model for requirements engineering. The primary objective of the study was to provide empirical evidence that requirement engineers may perform better at selecting Functional Requirements (FRs) while optimizing and balancing Non-Functional Requirements (NFRs) using this post-processed model, compared to the original i* model.</p> <p>The data in this dataset was used for the analyses presented in the publication and includes the inputs required to evaluate the performance of requirement engineers in selecting FRs and optimizing NFRs. It provides the basis for comparing the decision-making efficiency and accuracy in FR selection, as well as the optimization process for NFRs in both the original and automated post-processed i* models.</p>
Controlled Experiments with chatbots in education: a systematic mapping
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Data from: Elasticity improves handgrip performance and user experience during visuomotor control
Passive rehabilitation devices, providing motivation and feedback, potentially offer an automated and low-cost therapy method, and can be used as simple human–machine interfaces. Here, we ask whether there is any advantage for a hand-training device to be elastic, as opposed to rigid, in terms of performance and preference. To address this question, we have developed a highly sensitive and portable digital handgrip, promoting independent and repetitive rehabilitation of grasp function based around a novel elastic force and position sensing structure. A usability study was performed on 66 healthy subjects to assess the effect of elastic versus rigid handgrip control during various visuomotor tracking tasks. The results indicate that, for tasks relying either on feedforward or on feedback control, novice users perform significantly better with the elastic handgrip, compared with the rigid equivalent (11% relative improvement, 9–14% mean range; p < 0.01). Furthermore, there was a threefold increase in the number of subjects who preferred elastic compared with rigid handgrip interaction. Our results suggest that device compliance is an important design consideration for grip training devices.
Supplementary material 2 from: Baskauf SJ, Girón Duque JC, Nielsen M, Cobb NS, Singer R, Seltmann KC, Kachian Z, Pérez M, Agosti D, Klompen AML (2023) Implementation Experience Report for Controlled Vocabularies Used with the Audubon Core Terms subjectPart and subjectOrientation. Biodiversity Information Science and Standards 7: e94188. https://doi.org/10.3897/biss.7.94188
Views Controlled Vocabularies Implementation Reporting Form
Supplementary material 1 from: Baskauf SJ, Girón Duque JC, Nielsen M, Cobb NS, Singer R, Seltmann KC, Kachian Z, Pérez M, Agosti D, Klompen AML (2023) Implementation Experience Report for Controlled Vocabularies Used with the Audubon Core Terms subjectPart and subjectOrientation. Biodiversity Information Science and Standards 7: e94188. https://doi.org/10.3897/biss.7.94188
Views Controlled Vocabularies testing notes
Live programming controlled experiment on state machines for robotic behaviors
<p>All the information about the controlled experiment performed on the Live Robot Programming language (LRP) vs SMACH (Python API), both for program comprehension and program writing</p> <ul> <li>Programs for both SMACH and LRP</li> <li>Introductory material for both SMACH and LRP</li> <li>Questionnaires</li> <li>Raw and processed data</li> </ul>
Conceptual Model for Supporting the Teaching of Software Engineering Controlled Experiments and Quasi-Experiments
<p>Conceptual Model for Supporting the Teaching of Software Engineering Controlled Experiments and Quasi-Experiments</p>
An Evaluation of Myopia Control Lenses on Wearing Experience in Myopic Children
ClinicalTrials.gov study NCT07354945. IPD Sharing: NO. Countries: 1. Publications: 0.
Randomized Controlled Experiment of Dieting in Pairs
ClinicalTrials.gov study NCT02898844. IPD Sharing: UNDECIDED. Countries: 0. Publications: 2.
Evaluating natural experiments in ecology: using synthetic controls in assessments of remotely-sensed land-treatments
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Data from: Controlled feeding experiments with diets of different abrasiveness reveal slow development of mesowear signal in goats (Capra aegagrus hircus)
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Data from: Taphonomic experiments resolve controls on the preservation of melanosomes and keratinous tissues in feathers
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Data from: Mesocosm experiments reveal the impact of mosquito control measures on malaria vector life history and population dynamics
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Data from: Herbivores control effects of algal species richness on community biomass and stability in a laboratory microcosm experiment
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Data from: Elasticity improves handgrip performance and user experience during visuomotor control
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Data from: Ageing and agency: age-related changes in susceptibility to illusory experiences of control
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.