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Four-fold rotational symmetry in art: example n.2
<p>The Halaf culture is a prehistoric period which lasted between about 6100 BC and 5100 BC. The period is the ontinuous evolution of the earlier Pottery Neolithic. Its location is mainly in the fertile valley of the Khabur River (Euphrates), although Halaf-influenced material is found throughout Greater Mesopotamia, The image shows Halafian wave with a four-fold symmetric decoration. The image is an elaboration of .courtesy image:by:Yuber, 28/05/2005, for Wikimedia.org.</p>
Four-fold rotational symmetry in art: example n.3
<p>The Samarra culture is a Late Neolithic culture of northern Mesopotamia. The figure shows a bowl (ca. 4000 BC) on exhibit at the Vorderasiatisches Museum, Berlin. The figure has been obtained from a picture taken by Dbachmann, a courtesy for Wikimedia.org - commons.wikimedia.org/wiki/File:Samarra_bowl.jpg. The given description tells that the bowl was found by Ernst Herzfeld in the 1911-1914 campaign. It is also told that the design shows four fish being caught by four birds. This is the four-fold symmetry here mentioned.in the tile. The dscription given in Wikimedia is also stressing that "as is typical of cultures from this region, the use of a base six numerical system can be seen in the lines surrounding the bowl, so that there are a total of 120 lines, or four quarters with 30 lines each".</p>
GYU-KING Rock art panel Multi-Light Reflectance Dataset, trial02
<p>--------------------------------------------------------------------------------------------------------------<br> GYU-KING ROCK ART PANEL MULTI-LIGHT REFLECTANCE DATASET, TRIAL02 <br> ---------------------------------------------------------------------------------------------------------------</p> <p>GYU-KING_Trial02_RTI</p> <p>Dataset composed during the National Geographic Society 'Tracing Paleolithic Aurochs: Rock Art Survey in Upper Egypt' project<br> directed by Dr. Dirk Huyge (Royal Museums of Art and History, Brussels)</p> <p>________________________________________________</p> <p>WHAT </p> <p>Multi-Light Reflectance (MLR) / Reflectance Transformation Imaging (RTI) dataset<br> - 49 original raw images (.nef, NIKON D800E)<br> - 49 derivates (.jpg)<br> - RTI Builder processing files<br> - MLR/RTI processed result HSH RTI (.rti)<br> - MLR/RTI processed result (.ptm)<br> - MLR/RTI processed result (.scml)<br> - 3D processed result based on conversion of HSH RTI into SCML into 3D (.ply, .obj)</p> <p> >>>>the .rti, .ptm and .scml files can (among others) be consulted via https://www.heritage-visualisation.org/viewer/<<<<</p> <p>DEPICTING</p> <p>The GYU-KING rock art panel and some surrounding rocks at Gebelet Yussef (Edfu, Aswan Governorate - N24.730935,E32.921496)<br> Specifications:<br> - Pictures taken during daytime (time setting on camera, in technical metadata, is incorrect!) under bright light conditions by the sun, date of data acquisition 2014-11-15<br> - A powerful flash light was used for the multi-light reflectance method (see https://doi.org/10.5281/zenodo.48060 for extra information)<br> - The obtained processed MLR/RTI models have, or have not, been cropped with the focus on the rock art panel.</p> <p>DATA ACQUISITION</p> <p>Hendrik Hameeuw & Wouter Claes</p> <p>PROCESSING</p> <p>Hendrik Hameeuw & Vincent Vanweddingen<br> _________________________________________________________<br> </p>
Visual discomfort and variations in chromaticity in art and nature
<p>Visual discomfort is related to the statistical regularity of visual images. The contribution of luminance contrast to visual discomfort is well understood and can be framed in terms of a theory of efficient coding of natural stimuli, and linked to metabolic demand. While colour is important in our interaction with nature, the effect of colour on visual discomfort has received less attention. In this study, we build on the established association between visual discomfort and differences in chromaticity across space. We average the local differences in chromaticity in an image and show that this average is a good predictor of visual discomfort from the image. It accounts for part of the variance left unexplained by variations in luminance. We show that the local chromaticity difference in uncomfortable stimuli is high compared to that typical in natural scenes, except in particular infrequent conditions such as the arrangement of colourful fruits against foliage. Overall, our study discloses a new link between visual ecology and discomfort whereby discomfort arises when adaptive perceptual mechanisms are overstimulated by specific classes of stimuli rarely found in nature.</p>
FIG. 12 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 12. — Intuitive phylogenetic tree based on carapace morphologies as outlined in the present study and on data from McLaughlin et al.(2007) and Fraaije et al.(2019). Important synapomorphies include the following: 1, cylindrical carapace; 2, cervical and branchial grooves widely separated; 3, arrow-shaped gastric region; 4, cervical groove not extending to lateral border; 5, intragastric grooves; 6, Y-linea; 7, spinose posterolateral borders.
FIG. 9 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 9. — Changes in taxonomic composition amongst paguroid assemblages within reefal settings during the Late Jurassic (Oxfordian, Kimmeridgian and Tithonian) and mid-Cretaceous (Albian) compared to modern faunas. Grey, Gastrodoridae; orange, cylindrical carapace; blue, non-cylindrical carapace.
FIG. 2 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 2. — Branchial condensation in representatives of the families Parapylochelidae (A, B), Gastrodoridae (C), Xylopaguridae (D, E) and Pylojacquesidae (F).
FIG. 5 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 5. — Isochelous chelae of Schobertella simonsenetlangi Schweigert, Fraaije, Havlik & Nützel, 2013 (SMNS 70555, Staatliches Museum für Naturkunde Stuttgart, Germany, from the Lower Jurassic (upper Pliensbachian) Amaltheenton Formation of Iggingen near Aalen, southwestern Germany. Scale bars: 5 mm.
FIG. 1 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 1. — Branchial condensation in basal paguroid genera: A, Platykotta Chablais, Feldmann & Schweitzer, 2011; B, Schobertella Schweigert, Fraaije, Havlik & Nützel, 2013; C, Eopaguropsis Fraaije, Krzemiński, Van Bakel, Krzemińska & Jagt, 2012.
FIG. 8 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 8. — Schobertella simonsenetlangi Schweigert, Fraaije, Havlik & Nützel, 2013 (SMNS 70555; see also Fig. 5), from the Lower Jurassic (upper Pliensbachian) Amaltheenton Formation of Iggingen near Aalen, southwestern Germany: (A) showing new details of shield morphology, compared to Eopaguropsis nidiaquilae Fraaije, Krzemiński, Van Bakel, Krzemińska & Jagt, 2012 (B) (see Fraaije et al. 2012c: fig. 2d). Scale bars: 10 mm.
FIG. 4 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 4. — Changes in the massetic regions through time; from the Late Jurassic Annuntidiogenes jurassicus Fraaije, 2014 (A) to the mid-Cretaceous (late Albian) Annuntidiogenes worfi Fraaije, van Bakel, Jagt, Klompmaker & Artal, 2009 (B) and extant Paguristes sp. (C).
FIG. 3 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 3. — Reduction of rostral length during the Late Jurassic in representatives of the families Gastrodoridae (A), Parapylochelidae (B) and Pylochelidae (C).
FIG. 7 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 7. — The oldest example of heterochelous paguroid claws from the Upper Jurassic of the Wimereux area (Boulonnais, northwestern France); an individual preserved in situ in the internal mould of a Vetigastropoda (private collection of Mr Gilles Dron). The maximum diameter of the gastropod is about 7 cm.
FIG. 11 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 11. — Paguropsids (Paguropsidae n. fam) through time, from the Oxfordian Eopaguropsis Fraaije, Krzemiński, Van Bakel. Krzemińska & Jagt, 2012 (A), via the Tithonian Eopaguropsis (B) to extant Paguropsis Lemaitre, Rahayu & Komai, 2018 (C).
FIG. 6 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 6. — Isochelous chelae of paguroids from the middle Callovian of Poitou, France: A, specimen UP/CGL.12.10 (UP = Université de Poitiers, CGL = Calcaires de Gratte-Loup). B, specimen UP/CGL.12.11. Photographs: Philippe Loubry. Scale bars: 10 mm.
FIG. 10 in The evolution of hermit crabs (Crustacea, Decapoda, Anomura, Paguroidea) on the basis of carapace morphology: a state-of-the-art-report
FIG. 10. — Transition from the Gastrodoridae to the Probeebeidae,featuring branchial condensation, reduction of rostrum, reduction of ornament on shield, inflation of posterior carapace, reduction of delineation of cardiac and reduction of midline carapace crest: A, Gastrodorus; B, Probeebei; C, Labidochirus; D, Tylaspis; E, Tisea.
Agonopterix subpropinquella Flügelspannweite über 20 mm. Im Mittelraum stehen zwei schräg übereinander liegende dunkle Punkte, gleich anschliessend folgt ein grösserer, etwas diffuser Fleck, anschliessend auf der Querader ein dunkler Punkt, der auch undeutlich sein kann. Sehr variable Art: Vor allem in Südeuropa Exemplare mit ledergelben Flügeln, schwarzen Punkten und schwarzem Thorax. in Agonopterix flurii sp. nov. aus dem Wallis, Schweiz (Lepidoptera, Depressariidae)
Agonopterix subpropinquella Flügelspannweite über 20 mm. Im Mittelraum stehen zwei schräg übereinander liegende dunkle Punkte, gleich anschliessend folgt ein grösserer, etwas diffuser Fleck, anschliessend auf der Querader ein dunkler Punkt, der auch undeutlich sein kann. Sehr variable Art: Vor allem in Südeuropa Exemplare mit ledergelben Flügeln, schwarzen Punkten und schwarzem Thorax.
Small mammal ARTS: Orion receiver data for site radiomapping and vole tracking, and scripts and results for localization and activity estimates
<p class="FirstParagraph">This data set accompanies "An Automated Radio-Telemetry System (ARTS) for Monitoring Small Mammals". </p> <p class="FirstParagraph">The behavior of small fossorial mammals, such as voles, is extremely difficult to observe in natural environments. Small mammals were traditionally studied with labor intensive methods such as trapping and recapture or radio telemetry via homing, which require week/months of work and produce static home range estimates.</p> <p class="FirstParagraph">In pursuit of better understanding natural history and behavioral ecology we implemented an automated radio telemetry system (ARTS) to continuously monitor small mammals. We used an isotropic antenna array coupled with broadband receivers to estimate animal positions with nonlinear least squares, nonparameteric, and Bayesian trilateration methods. We then used Lomb-Scargle periodograms to estimate activity patterns of freely-behaving Prairie voles.</p>
Galerías de arte
<p>Este conjunto de datos incluye un directorio con los datos de las <strong>Galerías de Arte </strong>de Zaragoza.</p> <p>El Ayuntamiento de Zaragoza pone a disposición una visualización en la que se muestran datos sobre Galerías de Arte. El conjunto de datos contiene información de localización (dirección, código postal, latitud y longitud), contacto (email y teléfono), horario y url a la web de cada centro.</p> <p><a href="https://www.zaragoza.es/sede/servicio/catalogo/2674">Acceso a la ficha descriptiva del dataset</a></p>
FIG. 15 in The dama gazelle Nanger dama (Pallas, 1766) in Saharan rock art
FIG. 15. — Four examples of gazelle-like engravings from El Rhallaouiya (Mauretania), considered to be possible dama gazelles (Nanger dama (Pallas, 1766)), despite their schematic representation. Photos credits: Robert Vernet.
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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)
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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.