Find research datasets worth reusing

Hyperspectral image using Specim IQ camera from Chatzivariti Winery (survey date 2021-07-23) #20

The image contains the hyperspectral data from Chatzivariti Winery captured with Specim IQ hyperspectral camera. The grape variety of the field is Traminer (Gewürztraminer). The image captured at 2021-07-23 (#20) and it was processed using Specim IQ Studio.

Hyperspectral image using Specim IQ camera from Chatzivariti Winery (survey date 2021-08-13) #17

The image contains the hyperspectral data from Chatzivariti Winery captured with Specim IQ hyperspectral camera. The grape variety of the field is Xinomavro. The image captured at 2021-08-13 (#17) and it was processed using Specim IQ Studio.

ARI index from Chatzivariti Winery (survey date 2021-05-28)

The image contains the ARI (Anthocyanin Reflectance Index) index from Chatzivariti Winery taken with Parrot Bluegrass Field drone equipped with Sequoia multispectral camera. The grape variety of the field is Traminer (Gewürztraminer). The image captured at 2021-05-28 and it was processed using PIX4DFields software.

GNDVI index from Chatzivariti Winery (survey date 2021-07-23)

The image contains the GNDVI (Green Normalized Difference Vegetation Index) index from Chatzivariti Winery taken with Parrot Bluegrass Field drone equipped with Sequoia multispectral camera. The grape variety of the field is Traminer (Gewürztraminer). The image captured at 2021-07-23 and it was processed using PIX4DFields software. GNDVI is an index of plant “greenness” or photosynthetic activity. GNDVI

opencc-zeroFeb 2023View details →

Radiometric dating of sediment cores from three alpine lakes in Utah, United States, with stable isotope data

We collected sediment cores from three alpine lakes in Utah, United States, to isolate dormant Daphnia eggs for a resurrection ecology experiment. Our question was whether radioactive fallout from above-ground nuclear weapons testing at the Nevada Test Site in the 1950s and 1960s caused increased mutation rates and population evolution in Daphnia. That work is ongoing. Here, we publish radioisotope dating profiles from our sediment cores.

opencc-by-4.0Jan 2015View details →

Fig. 4 in Two Asian freshwater snails newly introduced into South Africa and an analysis of alien species reported to date

Fig. 4. Gyraulus chinensis from Amatikulu. Live specimens (4A–B, photos: H. Madsen) and specimen preserved in 70 % ethanol (4C, photo: N. Miranda). The shell of the specimen in 4B shows patches of erosion. Note the pigmented mantle in both live and preserved specimens.

opencc-by-4.0Jan 2015View details →

Fig 3 in Two Asian freshwater snails newly introduced into South Africa and an analysis of alien species reported to date

Fig 3. (A) Tree based on 533 nucleotides of the cytochrome c oxidase subunit I mtDNA of lymnaeid samples, with the outgroup Planorbis corneus. (B) Tree based on 360 nucleotides of the mt 16S rDNA of lymnaeid samples, with the outgroup Stagnicola elodes. Numbers on branches represent Bayesian posterior probabilities percentages, neighbour-joining and maximum parsimony bootstrap values, respectively. Only values greater than 50 % are shown; * indicates support of <50 % for distance analysis. Figures adapted from Nadasan (2011). RRA – lymnaeid samples from Amatikulu, South Africa; LND – lymnaeid samples from Durban, South Africa.

opencc-by-4.0May 2021View details →

Dataset for Manually Coded Firm Founding Dates, CEO Duality, and CEO Photograph Prominence in Annual Reports

In this dataset, we wish to make available some measures which we manually coded as part of our PhDs. It contains manually coded information on S&P1500 firms and their CEOs, specifically, the firm’s founding year, whether the CEO is simultaneously chairperson of the board (CEO duality), and the prominence of the CEO in photographs in the firm’s annual report. More information can be found in the attached documentation. Both authors contributed equally to the creation of this dataset. Since this is the first version of this dataset, we are happy about any feedback, corrections, or additions. Please reach out to us in case you spot any irregularities or have questions via mappels@mail.uni-mannheim.de or mkowalzi@staff.mail.uni-mannheim.de.    The creation of this dataset was supported by the <a href="https://de.wikiversity.org/wiki/Wikiversity:Fellow-Programm_Freies_Wissen">Fellowship Freies Wissen</a> of the Wikimedia Foundation. More information on the project can be found <a href="https://de.wikiversity.org/wiki/Wikiversity:Fellow-Programm_Freies_Wissen/Einreichungen/Lowering_the_Barriers_for_Young_Strategy_Scholars:_An_Open-Access_Database_for_Manually_Computed_Variables_of_Strategy_Research">here</a>.

opencc-by-4.0Apr 2023View details →

Scanned data in support of "Paleomagnetic Study of Antarctic Deep-Sea Cores: Paleomagnetic study of sediments in a revolutionary method of dating events in Earth's History"

Data files contain paleomagnetic data in an archival format, scanned into PDF documents.  Data files contain 11 columns and include: Column 1) Sample identifier with cruise, core, and sample depth Column 2) Demagnetization field or temperature Column 3) Sample Magnetization Column 8) Declination Column 9) Inclination   PDFs include paleomagnetic data for: V16-132 V16-133 V16-134 V18-72 V16-57 V16-60 V16-66

opencc-zeroApr 2023View details →

Temporal population structure, a genetic dating method for ancient Eurasian genomes from the past 10,000 years

Radiocarbon dating is the gold standard in archeology to estimate the age of skeletons, a key to studying their origins. Many published ancient genomes lack reliable and direct dates, which results in obscure and contradictory reports. Here, we developed the Temporal Population Structure (TPS), the first DNA-based dating method for ancient genomes ranging from the Late Mesolithic to modern-days, and applied it to 3,591 ancient and 1,307 modern Eurasians. We show that TPS predictions align with their known dates and correctly account for kin relationships. TPS dating of poorly dated Eurasian samples resolved conflicting reports in the literature, as illustrated by one test case. We demonstrated how TPS improved the ability to study phenotypic traits over time.

opencc-by-4.0Mar 2023View details →

Model inputs and outputs for: Observation-based sowing dates and cultivars significantly affect yield and irrigation for some crops in the Community Land Model (CLM5)

Files used in initial submission of manuscript to Geoscientific Model Development. Files with names beginning sdates and gdds were used as model inputs for some experiments. File with name beginning hdates was used in postprocessing. ZIP archives are model experimental outputs.

opencc-by-4.0May 2023View details →

Date Fruit classification using a wide range of classifiers

Datasets generated by the techniques RUS and SMOTE. These datasets were used in the paper Date Fruit classification using a wide range of classifiers, accepted for publication in the International Conference on Systems, Signals and Image Processing (IWSSIP) 2023.

opencc-zeroJun 2023View details →

Impacts of taxon-sampling schemes on Bayesian tip dating under the fossilized birth-death process

Evolutionary timescales can be inferred by molecular-clock analyses of genetic data and fossil evidence. Bayesian phylogenetic methods such as tip dating provide a powerful framework for inferring evolutionary timescales, but the most widely used priors for tree topologies and node times often assume that present-day taxa have been sampled randomly or exhaustively. In practice, taxon sampling is often carried out so as to include representatives of major lineages, such as orders or families. We examined the impacts of different densities of diversified sampling on Bayesian tip dating on unresolved fossilized birth-death (FBD) trees, in which fossil taxa are topologically constrained but their exact placements are averaged out. We used synthetic data generated by simulations of nucleotide sequence evolution, fossil occurrences, and diversified taxon sampling. Our analyses under the diversified-sampling FBD process show that increasing taxon-sampling density does not necessarily improve divergence-time estimates. However, when informative priors were specified for the root age or when tree topologies were fixed to those used for simulation, the performance of tip dating on unresolved FBD trees maintains its accuracy and precision or improves with taxon-sampling density. By exploring three situations in which models are mismatched, we find that including all relevant fossils, without pruning off those that are incompatible with the diversified-sampling FBD process, can lead to underestimation of divergence times. Our reanalysis of a eutherian mammal data set confirms some of the findings from our simulation study, and reveals the complexity of diversified taxon sampling in phylogenomic data sets. In highlighting the interplay of taxon-sampling density and other factors, the results of our study have practical implications for using Bayesian tip dating to infer evolutionary timescales across the Tree of Life.

opencc-by-4.0Dec 2022View details →

Date set for the manuscript: The Role of Sediment Gas Storage in the Methane Dynamics of a Shallow Freshwater Reservoir

The dataset supports the findings of the manuscript entitled: Linking Sediment Gas Storage to the Methane Dynamics in a Shallow Freshwater Reservoir. The manuscript presents results based on in-situ monitoring at the main pre-dam of the Wupper reservoir. The reservoir is located in Germany and the monitoring was conducted from March 2020 to November 2021. The main goal of the monitoring was to measure the spatial variability of methane fluxes and its dynamics in the reservoir. The methane budget of the reservoir was then analysed in combination with estimates of the amount of free gas stored in the sediment matrix, which were derived from acoustic observations. The findings are discussed in the manuscript. Therefore, the dataset provided as an xlsx file includes separate sheets for: <ul> <li>Sediment measurements of potential methane production (PMP), loss on ignition (LOI), dissolved methane (CH4) in porewater, carbon and nitrogen content.</li> <li>Gas content in the sediment estimated from maximum acoustic backscatter for 2020 and 2021 for the reservoir spatial grid.</li> <li>Monthly time-series of methane fluxes (oxidation, diffusion, ebullition, and potential flux at the sediment water interface - PSWI) for each monitoring location and for the reservoir (average of all monitoring locations) with the inclusion of degassing at the dam overflow and advective methane transport (Net-export) by inflow and outflow.</li> <li>Time series of daily mean values of ebullition and environmental parameters monitored in the reservoir.</li> </ul> Explanations and units are provided in column labels. NaN refers to missing data. In this version (Version 2), the calculation of the PSWI has been corrected. It is now calculated as the vertically integrated potential methane production over the top 30 cm layer of the sediment.

opencc-by-4.0May 2020View details →

Un mâle (Fig. 1a) et une femelle ont ainsi été capturés au moyen de deux pièges d'interception (selon le modèle de Brustel 2012). Le premier piège était suspendu sur un chêne mort sur pied dans une chênaie thermophile de plaine, à une altitude de 499 m (Fig. 1b). Outre cette découverte, ce piège a permis de mettre en évidence d'autres espèces rares telles Clytus tropicus (Panzer, 1795) (Cerambycidae) et Camptorhinus simplex Seidlitz, 1867 (Curculionidae). Le second piège, situé à près de 5 km du premier, était placé sur un hêtre mort sur pied à 869 m d'altitude. Cet arbre était notamment colonisé par Rosalia alpina (Linnaeus, 1758) (Cerambycidae). Ce second piège a permis de capturer en outre plusieurs spécimens de Stictoleptura scutellata (Fabricius, 1781) (Cerambycidae) et un de Mesosa curculionoides (Linnaeus, 1760) (Cerambycidae), deux espèces rares. À noter toutefois que de nombreux chênes étaient présents à proximité de ce hêtre. Malgré le long intervalle entre les deux relevés, l'excellent état de conservation des deux spécimens capturés laisse supposer une date tardive de capture (plutôt en novembre qu'en septembre ou octobre). in Tetratoma desmarestii Latreille, 1807, un Tetratomidae nouveau pour la faune de Suisse (Coleoptera)

Un mâle (Fig. 1a) et une femelle ont ainsi été capturés au moyen de deux pièges d'interception (selon le modèle de Brustel 2012). Le premier piège était suspendu sur un chêne mort sur pied dans une chênaie thermophile de plaine, à une altitude de 499 m (Fig. 1b). Outre cette découverte, ce piège a permis de mettre en évidence d'autres espèces rares telles Clytus tropicus (Panzer, 1795) (Cerambycidae) et Camptorhinus simplex Seidlitz, 1867 (Curculionidae). Le second piège, situé à près de 5 km du premier, était placé sur un hêtre mort sur pied à 869 m d'altitude. Cet arbre était notamment colonisé par Rosalia alpina (Linnaeus, 1758) (Cerambycidae). Ce second piège a permis de capturer en outre plusieurs spécimens de Stictoleptura scutellata (Fabricius, 1781) (Cerambycidae) et un de Mesosa curculionoides (Linnaeus, 1760) (Cerambycidae), deux espèces rares. À noter toutefois que de nombreux chênes étaient présents à proximité de ce hêtre. Malgré le long intervalle entre les deux relevés, l'excellent état de conservation des deux spécimens capturés laisse supposer une date tardive de capture (plutôt en novembre qu'en septembre ou octobre).

opencc-by-4.0Jul 2023View details →

Land Water Transition Zone Change Detection - Transition Maps between two dates - WQeMS raster products

Within this dataset, land water transition zone maps, which indicate the land-water transition between two instances in time, of the Polyphytos open surface water reservoir in Greece and Giaretta reservoir in Italy, are available in GeoTIFF raster format. The maps depict the transition zones by indicating the change of the pixel status from non-inundated to inundated and vice versa between two provided dates. They were generated by the Land Water Transition Zone Change Detection service of the WQeMS project. Each raster file in the dataset is named according to the water body and the two dates during which the processing was performed. Copernicus Sentinel-2 data was utilized for the generation of the inundation maps on the two dates.

opencc-by-4.0Jul 2023View details →

• Dhār धार (District Dhār, Madhya Pradesh). Inscription of the time of Bhoja on an image of the Jain goddess Ambikā dated saṃvat 1091, critical edition.

Dhār धार (District Dhār, Madhya Pradesh). Inscription of the time of Bhoja on an <a href="https://doi.org/10.5281/zenodo.8189712">image</a> of the Jain goddess Ambikā dated saṃvat 1091, critical edition.

opencc-zeroAug 2023View details →

Inferring human immunodeficiency virus 1 proviral integration dates with Bayesian Inference

Human immunodeficiency virus 1 (HIV) proviruses archived in the persistent reservoir currently pose the greatest obstacle to HIV cure due to their evasion of combined antiretroviral therapy and ability to reseed HIV infection. Understanding the dynamics of the HIV persistent reservoir is imperative for discovering a durable HIV cure. Here, we explore Bayesian methods using the software BEAST2 to estimate HIV proviral integration dates. We started with within-host longitudinal HIV sequences collected prior to therapy, along with sequences collected from the persistent reservoir during suppressive therapy. We built a BEAST2 model to estimate integration dates of proviral sequences collected during suppressive therapy, implementing a tip date random walker to adjust the sequence tip dates and a latency-specific prior to inform the dates. To validate our method, we implemented it on both simulated and empirical data sets. Consistent with previous studies, we found that proviral integration dates were spread throughout active infection. Path sampling to select an alternative prior for date estimation in place of the latency-specific prior produced unrealistic results in one empirical data set, while on another data set the latency-specific prior was selected as best-fitting. Our Bayesian method outperforms current date estimation techniques with a root mean squared error of 0.89 years on simulated data relative to 1.23–1.89 years with previously developed methods. Bayesian methods offer an adaptable framework for inferring proviral integration dates.

opencc-by-4.0Oct 2023View details →

Fig. 11 in A well preserved pan-pleurodiran (Dortokidae) turtle from the English Lower Cretaceous and the first radiometric date for the Wessex Formation (Hauterivian-Barremian) of the Isle of Wight, United Kingdom

Fig. 11. Biogeographic distribution of dortokid turtles during the Early Cretaceous modified from Cadena and Joyce (2015), Perez-García et al. (2017) and Augustin et al. (2021).