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1,245 results for “dating”
EXPLO. Sovjan 2021. OxCal code for radiocarbon dated tree-rings and charcoal
<p>Code used for modelling radiocarbon dated tree-rings and previously published charcoal dates from the archaeological site of Sovjan. Software used: OxCal v4.4.2 (Bronk Ramsey, 2020; Dee and Bronk Ramsey, 2014) presented in "<em>The Early Bronze Age dendrochronology of Sovjan (Albania): A first tree-ring sequence of the 24th – 22nd c. BC for the southwestern Balkans</em>", Maczkowski et al., 2021, DOI: <a href="http://dx.doi.org/10.1016/j.dendro.2021.125811">10.1016/j.dendro.2021.125811</a></p>
Date Creek Lichen colonization data
<p>Conservation of epiphytic lichens in managed forest landscapes relies on understanding limitations to their dispersal and establishment after harvesting. A hot-spot for cephalo- and cyanolichens, the Kispiox inland temperate rainforest of British Columbia, Canada, is an example of where forest managers seek silviculture options that allow for forest harvesting to continue, while also conserving threatened species. To characterize colonization of these lichens (including the nationally-threatened <i>Nephroma occultum</i> and <i>Lobaria retigera)</i>, we quantified thalli on 25-year-old regenerating spruce trees at varying distances from forest edges in logged openings of different sizes surrounded by mature (160 years) or old-growth (≥350 years) forest. This dataset records colonies observed along with the tree they were observed on and their size. The second dataset has information about each opening that was sampled.</p>
How to cite & reference in MHRA style (author-date system)
<p>This video explains how to cite & reference a chapter in an edited book in MHRA style using the author-date system.</p>
Figure 1 in Field application of six commercial essential oils against Date Palm mite, Phyllotetranychus aegypticus (Acari: Tenuipalpidae) in Egypt
Figure 1. The relationship (regression modeling at P = 0.05) between X (temperature recorded in spring, summer, and autumn), and Y (predicted value which representing mite populations before and after oil treatments). The line is the linear model, significant part till temperature ≤ 27 (which represents spring and autumn treatments). While the circle in the end part, temperature> 27.50 (representing effect of oil in summer) is not significant, P = 0.202ns.
Figure 5 in Field application of six commercial essential oils against Date Palm mite, Phyllotetranychus aegypticus (Acari: Tenuipalpidae) in Egypt
Figure 5. Independent-samples test of ordered alternatives (Jonckheere-Terpstra Test) on the relation between tested commercial essential oils of thyme, spearmint, jasmine, banana, camphor and clove across the temperature recorded in the field application 2018, at 0.05 significance level.
Figure 4 in Field application of six commercial essential oils against Date Palm mite, Phyllotetranychus aegypticus (Acari: Tenuipalpidae) in Egypt
Figure 4. Independent-samples median (Kolmogorov-Smirnov Test) resulted the distribution and the median of tested commercial essential oils of thyme, spearmint, jasmine, banana, camphor and clove across the three categories of season (spring, summer, and autumn), at 0.05 significance level.
Figure 2 in Field application of six commercial essential oils against Date Palm mite, Phyllotetranychus aegypticus (Acari: Tenuipalpidae) in Egypt
Figure 2. The relationship between numbers of Phyllotetranychus aegyptiacus active stages/50 leaflets of palm trees (treated and control), and the optimum temperature recorded (°C) during spring, summer, and autumn 2018 in Giza.
FIG. 20. — Tectulipora tuberculata n in ERRATUM volume 34 (4), 2012: 693-738. Date of publication: December 28, 2012. Description of a bryozoan fauna from mud mounds of the Lebanza Formation (Lower Devonian) in the Arauz area (Pisuerga-Carrión Province, Cantabrian Zone, NW Spain)
FIG. 20. — Tectulipora tuberculata n. sp: A, B, tangential section showing superstructure, holotype SMF 21.361; C, mid tangential section showing autozooecial chambers, apertures and wide keels, SMF 21.378; D, tangential section showing autozooecial apertures, holotype SMF 21.361; E, tangential section of reverse surface showing microacanthostyles and nodes, paratype SMF 21.377; F, tangential section of obverse surface showing granulated skeleton of axial wall, paratype SMF 21.371; G, longitudinal section, paratype SMF 21.362; H, transverse section of conical colony at its base, paratype SMF 21.369.Scale bars:A, B, G, H, 1 mm; C, 0.5 mm; D, 0.2 mm; E, F, 0.1 mm.
Text-fig. 7. Stratigraphic ranges of selected, biostratigraphically relevant taxa from Late Pennsylvanian and Early Permian of Saar-Nahe Basin. Based on data from Kerp and Fichter (1985), Lausberg et al. (2003), Schindler et al. (2004), Kerp et al. (2007a, b), Cleal (2008) and Uhl (2008). Absolute age of 300.0 ± 1.2 Ma in middle of Remigiusberg Formation based on Ar-Ar dating of sanidins published by Burger et al. (1997). in New Data On The Macroflora Of The Basal Rotliegend Group (Remigiusberg Formation; Gzhelian) In The Saar-Nahe Basin (Sw-Germany)
Text-fig. 7. Stratigraphic ranges of selected, biostratigraphically relevant taxa from Late Pennsylvanian and Early Permian of Saar-Nahe Basin. Based on data from Kerp and Fichter (1985), Lausberg et al. (2003), Schindler et al. (2004), Kerp et al. (2007a, b), Cleal (2008) and Uhl (2008). Absolute age of 300.0 ± 1.2 Ma in middle of Remigiusberg Formation based on Ar-Ar dating of sanidins published by Burger et al. (1997).
Figs 10-17 in A European discovery: Kalliste pavonum gen. nov., sp. nov., the smallest phalangiid species known to date (Arachnida: Opiliones: Phalangiidae)
Figs 10-17. Kalliste pavonum gen. sp. nov. (10-12) Male pedipalp in pro-lateral (10), retro-lateral (11) and dorsal view (12); patella and tibia only (11-12). (13-15) Female pedipalp in pro-lateral (13), retro-lateral (14) and dorsal view (15); patella and tibia only (14-15). (16-17) Palpal claws of male (16) and female (17), both from Col de Verde, lateral view. Scales: 0.3 mm (Figs 10-15); 0.03 mm (Figs 16-17).
Figs 5-9 in A European discovery: Kalliste pavonum gen. nov., sp. nov., the smallest phalangiid species known to date (Arachnida: Opiliones: Phalangiidae)
Figs 5-9. Kalliste pavonum gen. sp. nov. (5) Body of male holotype with chelicerae and pedipalps in lateral view. (6) Same (without chelicerae and pedipalps) in dorsal view. (7) Male chelicera in retro-lateral view. (8) Female chelicera in same view. (9) Male tuber oculorum in lateral view. Scales: 1.0 mm (Figs 5-6); 0.3 mm (Figs 7-8); 0.25 mm (Fig. 9).
Figs 1-4 in A European discovery: Kalliste pavonum gen. nov., sp. nov., the smallest phalangiid species known to date (Arachnida: Opiliones: Phalangiidae)
Figs 1-4. Kalliste pavonum gen. sp. nov. (1) Body of male holotype in dorsal view. (2) Same in ventral view. (3) Body of female paratype in dorsal view. (4) Same in ventral view. Scale: 0.5 mm.
Snow melt onset date estimates derived from CLARA-A2 SAL surface albedo dataset
<p>Snow melt onset date estimates for the Northern Hemisphere, 1982-2015. Derived from the CLARA-A2 SAL surface albedo dataset. Version for manuscript review.</p>
Network of reference tree-ring chronologies for forensic botanical (dendrochronological) examinations and dating of architectural structures in the Tyva Republic.
<p>The database consists of tables. First sheet - general description of tree-ring chronologies (general information: name of chronology, authors, data type, tree-ring parameter, notes, key words; description of sample collection site: site name, location, region, latitude, longitude, height; description of sample collection: collection code designation, number of series, year of first ring, year of last ring, maximum length of sample, average width of year ring; species affiliation - species; support - grant number). Second sheet, first column - years, second column - standardized growth value. The third sheet is a PDF document containing the results of independent testing in the program COFECA (the file is opened by the command: right-click/Acrobat Document object/open). The database is implemented in the OpenOffice.org Calc spreadsheet processor. The table file format is an internal OpenOffice.org Calc format, with the extension .ods. The data is accessed and structured using the standard tools "Sort", "Autofilter", etc. In the database, the integrity restriction control is not implemented, the user is invited to monitor the integrity of the database himself. Computer type: IBM PC. PC; OS: Windows 10.</p> <p>Type and version of the database management system: OpenOffice.org Calc.</p> <p>Database size: 5.6 MB</p>
Expectation-Maximization enables phylogenetic dating under a Categorical Rate Model
<div> <div> <div> <p>Dating phylogenetic trees to obtain branch lengths in the unit of time is essential for many downstream applications but has remained challenging. Dating requires inferring mutation rates that can change across the tree. While we can assume to have information about a small subset of nodes from the fossil record or sampling times (for fast-evolving organisms), inferring the ages of the other nodes essentially requires extrapolation and interpolation. Assuming a clock model that defines a distribution over rates, we can formulate dating as a constrained maximum likelihood (ML) estimation problem. While ML dating methods exist, their accuracy degrades in the face of model misspecification where the assumed parametric statistical clock model vastly differs from the true distribution. Notably, existing methods tend to assume rigid, often unimodal rate distributions. A second challenge is that the likelihood function involves an integral over the continuous domain of the rates and often leads to difficult non-convex optimization problems. To tackle these two challenges, we propose a new method called Molecular Dating using Categorical-models (MD-Cat). MD-Cat uses a categorical model of rates inspired by non-parametric statistics and can approximate a large family of models by discretizing the rate distribution into k categories. Under this model, we can use the Expectation-Maximization (EM) algorithm to co-estimate rate categories and branch lengths in the time unit. Our model has fewer assumptions about the true clock model than parametric models such as Gamma or LogNormal distribution. Our results on two simulated and real datasets of Angiosperms and HIV and a wide selection of rate distributions show that MD-Cat is often more accurate than the alternatives, especially on datasets with nonmodal or multimodal clock models.</p> </div> </div> </div>
Chalgrove Lake (Buffalo Creek Watershed) Date from 2022-05-20 to 2022-06-28
<p>General Metadata for Chalgrove Lake YSI Data</p> <p>Files</p> <p>Specific metadata for each deployment can be found as text files with the file format of:</p> <pre><code>BC_chalgrove_lake_YYYY-MM-DD_YYYY-MM-DD_metadata.txt</code></pre> <p>Where YYYY-MM-DD_YYYY-MM-DD is the date range of the deployment.</p> <p>File Created</p> <ul> <li>2019-04-12 by KF</li> </ul> <p>File Modified</p> <ul> <li>2019-10-31 by KF - added the descriptions of the total algae variables</li> <li>2022-05-04 by KF - updated to match LEO standards and current deployment specs</li> <li>2022-05-23 by KF - updated to include Total Algae Sensor information</li> </ul> <p>Description</p> <p>These data are from a YSI EXO2 multiparameter sonde deployed at approximatly 0.7 m in Chalgrove Lake (37.242983 N, -78.464116 W) in approximately 4 m of water.</p> <p>Sonde Specifics</p> <p>The specific sensors and SNs deployed are on the metadata specific to each deployment but generally the sonde has:</p> <ul> <li>Temperature</li> <li>Conductivity</li> <li>pH</li> <li>ODO</li> <li>Turbidity</li> <li>Total Algae</li> </ul> <p>Measurement Parameters, units, and Variable Names</p> <ul> <li>date.time = the combined date and time of the measurement (YYYY-MM-DD HH:MM:SS)</li> <li>date = the sampling date reported by the YSI (M/D/YYYY)</li> <li>time = the sampling time reported by the YSI (HH:MM:SS)</li> <li>frac_sec = the sampling fractions of a second reported by the YSI</li> <li>site_name = the site name on the YSI deployment (left blank)</li> <li>Cond = the conductivity (uS/cm)</li> <li>Chl_RFU = the raw fluorescence of the chlorophyll sensor (RFU)</li> <li>nLF_Cond = the nLF conductivity (uS/cm)</li> <li>DO_perc = the percent oxygen saturation</li> <li>DO_percL = the percent local oxygen saturation</li> <li>DO_mgL = the dissolved oxygen concentration (mg/L)</li> <li>SAL = the salinity (psu)</li> <li>SPC = the specific conductivity (uS/cm)</li> <li>TAL_PC_RFU = the raw fluorescence of the phycocyanin (blue green algae) sensor (RFU)</li> <li>TDS = the total dissolved solids (mg/L)</li> <li>Turbidity = the turbidity of the water (FNU)</li> <li>TSS = the total suspended solids</li> <li>pH = the pH</li> <li>pH_mV = the millivolts of the pH sensor</li> <li>Temp = the temperature (dC)</li> <li>Batt_V = the battery voltage</li> <li>Cable_V = the cable power</li> </ul>
Irrigation water source matters: Saline groundwater irrigation lowers date palm root-associated fungal richness and alters their community patterns
<p>Saline groundwater irrigation is predominantly used for date palm (<em>Phoenix dactylifera</em>) cultivation in the arid regions of the Middle East and North Africa without knowing its impact on root-associated fungal (RAF) communities. We investigated the impact of irrigation water sources (freshwater <em>vs.</em> saline groundwater) on date palm RAF diversity, communities, and their assembly processes. Summarily, we show that water chemistry (pH and EC) mainly structures RAF communities, whereas water pH shapes saprotrophic and pathotrophic communities, and the higher abundance of saprotrophic RAF (i.e. <em>Acrocalymma vagum</em>) under saline groundwater irrigation, despite the higher importance of the drift process, indicates their potential role in nutrient cycling and plant growth promotion under saline conditions in arid agroecosystems.</p>
Figs 3-8 in On the identity and distribution of Hebrus nipponicus HORVÁTH, 1929, with a note on the publication date of Hebrus CURTIS (Hemiptera: Hebridae)
Figs 3-8: Morphological details of Hebrus nipponicus, lectotype (except 6). (3) Head, frontal view. (4) Head, lateral view. (5) Mesoscutellum and metanotal elevation of brachypterous morph. (6) Same of macropterous morph (specimen from Philippines). (7) Proctiger, dorsal view. (8) Left paramere, lateral view.
Figs 1-2 in On the identity and distribution of Hebrus nipponicus HORVÁTH, 1929, with a note on the publication date of Hebrus CURTIS (Hemiptera: Hebridae)
Figs 1-2: Lectotype of Hebrus nipponicus, brachypterous male. (1) Habitus, dorsal view. (2) Paper card with genitalia and labels (not on scale).
Hyperspectral image using Specim IQ camera from Chatzivariti Winery (survey date 2021-08-13) #33
<p>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 2021-08-13 (#33) and it was processed using Specim IQ Studio.</p>
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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.