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614 Research products, page 1 of 62

  • Research data
  • 2022-2022
  • Dataset
  • DataverseNL

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  • Open Access
    Authors: 
    Orla Delaney; Joseph Padfield;
    Publisher: Zenodo
    Project: EC | IPERION CH (654028), EC | SSHOC (823782), EC | IPERION CH (654028), EC | SSHOC (823782)

    In 2018 the IPERION-CH Grounds Database was presented to examine how the data produced through the scientific examination of historic painting preparation or grounds samples, from multiple institutions could be combined in a flexible digital form. Exploring the presentation of interrelated high resolution images, text, complex metadata and procedural documentation. The original main user interface is live, though password protected at this time. Work within the SSHOC project aimed to reformat the data to create a more FAIR data-set, so in addition to mapping it to a standard ontology, to increase Interoperability, it has also been made available in the form of open linkable data combined with a SPARQL end-point. A draft version of this live data presentation can been found Here. This is a draft data-set and further work is planned to debug and improve its semantic structure.This deposit contains the CIDOC-CRM mapped data formatted in XML and an example model diagram representing some of the key relationships covered in the data-set. Live access to this data, with documentation and worked examples, can be found at: https://rdf.ng-london.org.uk/sshoc

  • Open Access
    Authors: 
    Padfield, Joseph; Delaney, Orla;
    Publisher: Zenodo
    Project: EC | SSHOC (823782), EC | SSHOC (823782)

    In 2007 the Raphael Research Resource project began to examine how complex conservation, scientific and art historical research could be combined in a flexible digital form. Exploring the presentation of interrelated high resolution images and text, along with how the data could be stored in relation to an event driven ontology in the form of RDF triples. The original main user interface is still live, In 2021/21 as part of the SSHOC Project the raw data stored within the system was mapped to the CIDOC CRM using a custom set of Python scripts (https://doi.org/10.5281/zenodo.6461654). The SSHOC work aimed to make this data more FAIR so in addition to mapping it to a standard ontology, to increase Interoperability, it has also been made available in the form of open linkable data combined with a SPARQL end-point. This live data presentation can been found Here. This deposit contains the CIDOC-CRM mapped data formatted in XML and an example model diagram representing some of the key relationships covered in the data-set. Live access to this data, with documentation and worked examples, can be found at: https://rdf.ng-london.org.uk/sshoc

  • Open Access
    Authors: 
    Jansma, Esther; Elsemieke Spoor-Hanraets;
    Country: Netherlands

    Dendrochronological research project

  • Open Access
    Authors: 
    Doeve, Petra;
    Publisher: DataverseNL
    Country: Netherlands

    Dendrochronological report

  • Open Access
    Authors: 
    Leyva-Vallina, Maria; Strisciuglio, Nicola; López Antequera, Manuel; Tylecek, Radim; Blaich, Michael; Petkov, Nicolai;
    Country: Netherlands

    Place recognition can be achieved by identifying whether a pair of images (a labeled reference image and a query image) depict the same place, regardless of appearance changes due to different viewpoints or lighting conditions. It is an important component of systems for camera localization and for loop closure detection, and a widely studied problem for indoor or urban environments. Recently, the use of robots in agriculture and automatic gardening has created new challenges due to the highly repetitive appearance with prevalent green color and repetitive texture of garden-like scenes. The lack of available data recorded in gardens or plant fields makes difficult to improve localization algorithms for such environments. In this paper, we propose a new data set of garden images for testing algorithms for visual place recognition. It contains images with ground truth camera pose recorded in real gardens at different times, with varying light conditions. We also provide ground truth for all possible pairs of images, indicating whether they depict the same place or not. We also performed a thorough benchmark of several holistic (whole-image) descriptors and provide the results on the proposed data set. We observed that existing descriptors have difficulties with scenes with repetitive textures and large changes of camera viewpoint.

  • Research data . 2022
    Open Access
    Authors: 
    Lambert, GL;
    Publisher: DataverseNL
    Country: Netherlands

    Dendrochronological research project

  • Open Access
    Authors: 
    Sthijns, Mireille;
    Publisher: DataverseNL
    Country: Netherlands

    Oxidative stress is important for cell fate. Islets of Langerhans are very sensitive to oxidative stress because of their low antioxidant levels. In this study, we investigated whether the ratio of the two main islet cell types, alpha and beta cells, and their interactions due to culturing in three-dimensional (3D) aggregates could protect against oxidative stress. Monolayer and aggregate culture were established by seeding the alphaTC1 (alpha) cells and INS1E (beta) in varying ratios and hydrogen peroxide (H2O2) was used to induce oxidative stress. Viability, oxidative stress and the level of antioxidant glutathione (GSH) were determined. Both 3D aggregation and an increasing prevalence of INS1E cells conferred greater resistance to cell death induced by oxidative stress. Increasing the prevalence of INS1E cells also decreased the number of oxidative stress positive alpha cells in monolayer culture. In 3D aggregates, the ratio of 50:50 prevented oxidative stress both in beta and alpha cells.

  • Restricted
    Authors: 
    Wu, Liyang; Hanssen, Marjolein M.; Peters, Madelon L.;
    Country: Netherlands

    The best-possible-self (BPS) intervention is one of the most widely used positive psychological interventions. It has been shown to promote well-being, optimism and positive affect and to decrease negative affect. However, most research has been conducted in western countries and its effectiveness in people from Eastern countries has been questioned. In this study, we examined the effect of the BPS in young adults from mainland China. Moreover, we investigated the moderating effect of cultural orientation, self-efficacy, and trait optimism and the mediating effect of state optimism and goal-related cognitions. Seventy participants were randomly assigned to the BPS or the control condition. In contrast to previous studies, the BPS did not lead to higher positive affect or well-being in Chinese, but rather to decreased negative affect and negative future expectancies. No significant moderating or mediating effect was found. This study indicates that the effects of the BPS might differ across cultures.

  • Open Access
    Authors: 
    Gubins, Ilja; Van Der Schot, Gijs; Veltkamp, Remco; Forster, Friedrich;
    Country: Netherlands

    Different imaging techniques allow us to study the organization of life at different scales. Cryo-electron tomography (cryo-ET) has the ability to three-dimensionally visualize the cellular architecture as well as the structural details of macro-molecular assemblies under near-native conditions. Due to beam sensitivity of biological samples, an inidividual tomogram has a maximal resolution of 5 nanometers. By averaging volumes, each depicting copies of the same type of a molecule, resolutions beyond 4 Å have been achieved. Key in this process is the ability to localize and classify the components of interest, which is challenging due to the low signal-to-noise ratio. Innovation in computational methods remains key to mine biological information from the tomograms. To promote such innovation, we organize this SHREC track and provide a simulated dataset with the goal of establishing a benchmark in localization and classification of biological particles in cryo-electron tomograms. The publicly available dataset contains ten reconstructed tomograms obtained from a simulated cell-like volume. Each volume contains twelve different types of proteins, varying in size and structure. Participants had access to 9 out of 10 of the cell-like ground-truth volumes for learning-based methods, and had to predict protein class and location in the test tomogram. You can find more details in the related publication and on the contest webpage.

  • Open Access
    Authors: 
    Vaessen, Rens; Derroire, Geraldine; Petronelli, Pascal; De Vries, Jesse; Van Kuijk, Marijke;
    Country: Netherlands

    Trait data for tree recruits at eight sites in French Guiana. Leaf traits have been measured. Fruit and seed traits have been collected from literature.

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