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769 results for “Clock”
Clock 3D Model
Trying to beef up my portfolio and decided to make this clock from an inspiration image. Feel free to use it. Source: Objaverse 1.0 / Sketchfab
Mantel clock
Mantel clock, imperial style pendulum clock with spring action. 18th/19th century, Paris Jagiellonian University Museum Collegium Maius Inventory number: 1735; 1448/V https://muzea.malopolska.pl/en/objects-list/2744 Source: Objaverse 1.0 / Sketchfab
Reloj siglo XV / XVth Century Clock
Impresionante trabajo realizado por Ardavin Medieval Clocks. Tras su restauración ha supuesto un verdadero dolor de cabeza. Partes brillantes, texturas suaves, partes móviles... Amazing creation of Ardavin Medieval Clocks. After restoration becomes a headache. Shinng parts, soft textures, moving parts... Source: Objaverse 1.0 / Sketchfab
Clock Tower in Comacchio, Italy
Historical clock tower located in Comacchio, a northern Italy town, famouse for the food and for it being called "The Little Venice". Source: Objaverse 1.0 / Sketchfab
Drone photogrammetry of an italian clock tower
Drone photogrammetry of the clock tower in Fontane (Treviso), Italy. Source: Objaverse 1.0 / Sketchfab
Eski Saat - Old Clock
This is old clock for a games or other things. Eski saat oyunlar için ideal kullanımdır. Source: Objaverse 1.0 / Sketchfab
XMCD data and XAS spectra, and simulation data for Clocked Dynamics in Artificial Spin Ice
<p><strong>Experimental data</strong></p><p>Raw data of XMCD images collected at ALBA Synchrotron between 8th to 12th of September 2022. The data are used to create the experimental magnetization curves and magnetic contrast images in the paper <i>Clocked dynamics in artificial spin ice. </i>Additionally, XAS spectra of the Fe L3 edge obtained prior to imaging are included.</p><p>Folder numbers starting at 225 through to 320 contain the data for the unipolar clocking experiment. The folder "001_XAS_Fe" contains the XAS spectrum of the sample taken prior to this series. <br>Folder numbers starting at 166 through to 217 contain the data for the bipolar clocking experiment. The folder "013_XAS_Fe_L3_CN" contains the XAS spectrum of the sample prior to this series.</p><p><strong>Simulation data</strong></p><p>The resulting data from flatspin simulations that are plotted as magnetization curves in the paper <i>Clocked dynamics in artificial spin ice. </i></p><p>The folder "flatspin-unipolar" contains the data for the unipolar clocking experiment.<br>The folder "flatspin-bipolar" contains the data for the bipolar clocking experiment.</p>
Data from: Bayesian total-evidence dating revisits sloth phylogeny and biogeography: a cautionary tale on morphological clock analyses
<p>Combining morphological and molecular characters through Bayesian total-evidence dating allows inferring the phylogenetic and timescale framework of both extant and fossil taxa, while accounting for the stochasticity and incompleteness of the fossil record. Such an integrative approach is particularly needed when dealing with clades such as sloths (Mammalia: Folivora), for which developmental and biomechanical studies have shown high levels of morphological convergence whereas molecular data can only account for a limited percentage of their total species richness. Here, we propose an alternative hypothesis of sloth evolution that emphasizes the pervasiveness of morphological convergence and the importance of considering the fossil record and an adequate taxon sampling in both phylogenetic and biogeographic inferences. Regardless of different clock models and morphological datasets, the extant sloth <em>Bradypus</em> is consistently recovered as a megatherioid, and <em>Choloepus</em> as a mylodontoid, in agreement with molecular-only analyses. The recently extinct Caribbean sloths (Megalocnoidea) are found to be a monophyletic sister-clade of Megatherioidea, in contrast to previous phylogenetic hypotheses. Our results contradict previous morphological analyses and further support the polyphyly of "Megalonychidae", whose members were found in five different clades. Regardless of taxon sampling and clock models, the Caribbean colonization of sloths is compatible with the exhumation of islands along Aves Ridge and its geological time frame. Overall, our total-evidence analysis illustrates the difficulty of positioning highly incomplete fossils, although a robust phylogenetic framework was recovered by an <em>a posteriori</em> removal of taxa with high percentages of missing characters. Elimination of these taxa improved topological resolution by reducing polytomies and increasing node support. However, it introduced a systematic and geographic bias because most of these incomplete specimens are from northern South America. This is evident in biogeographic reconstructions, which suggest Patagonia as the area of origin of many clades when taxa are underrepresented, but Amazonia and/or Central and Southern Andes when all taxa are included. More generally, our analyses demonstrate the instability of topology and divergence time estimates when using different morphological datasets and clock models, and thus caution against making macroevolutionary inferences when node support is weak or when uncertainties in the fossil record are not considered.</p>
Data from: Lunar synchrony, geography, and individual clocks shape autumn migration timing in an avian migrant
<p>Timing programs in animal migrants have been selected to synchronize movements that coincide with predictable resources on the breeding and nonbreeding grounds. Migrants face potential temporal conflicts if their migration schedules benefit from synchrony to conflicting rhythms associated with annual biogeographical (circannual) cues, lunar (circalunar) cues, or individually-repeatable internal clocks. We repeat-tracked individuals of an avian lunaphilic species, Eastern Whip-poor-will (<em>Antrostomus vociferus</em>), for 2–3 successive autumn migrations to determine the influence of the lunar cycle, breeding location, and individual repeatability on migration timing. Almost all birds avoided departing for migration during a full moon, likely to take advantage of the bright moonlight to facilitate visual foraging and enhance pre-migration fattening. However, groups from two latitudinally-distant sampling areas adjusted their autumn departure timing differently relative to the timing of the September full moon, presumably due to differences in seasonal prey availability. Individual repeatability increased throughout autumn migration, suggesting that the factors responsible for shaping migration timing may differ for different migration stages. Our results, that lunar synchrony, local climate, and individual internal clocks appeared to account for much of the variation in migration timing in whip-poor-wills, underscore the value of measuring potentially interacting factors that shape migratory behavior at species, group, and individual levels. It remains unclear if, or how, maintaining individually-repeatable annual migration schedules provides an adaptive benefit for whip-poor-wills or other lunaphilic migrants. Further clarifying the reasons for phenotypic variation in whip-poor-will migration timing will improve predictions of their abilities to adjust migratory movements under changing environmental conditions.</p>
18th Century French Regence Ormolu Bracket Clock
A Régence ormolu-mounted Boulle marquetry bracket clock first quarter 18th century. The ormolu is dial fitted with white enamel reserves and blue Roman numerals above an allegorical ormolu plaque. Veneered with mostly inact panels of Boulle marquetry in brass and red tortoise shell forming a foliate scroll. Source: Objaverse 1.0 / Sketchfab
Long Case Grandfather Clock with Moon Dial
The Long Case or Floor Clock was invented in the mid-17th century with pendulums calibrated to swing once a second. Thereafter these became items of high-end decoration as well as reliable time pieces. In the early 18th century, the moon or lunar dial was added. Around 1876 Long Case Clocks became better known as 'grandfather clocks' due to a popular song retelling the story of the song-writers putative grandfather's clock. This model would stand 1.95 metres tall, which is a typical size. Source: Objaverse 1.0 / Sketchfab
Relógio Lanterna Francês | French Lantern Clock
Este relógio lanterna de pêndulo é da autoria do mestre relojoeiro francês Adolphe Mougin. Este foi um relojoeiro de renome e produziu relógios de pêndulo para vários fabricantes de relógios. Sendo que Mougin produziu relógios em meados e finais do séc. XIX, podemos concluir que o mostrador e a caixa do séc. XVIII (1745) não lhe são originais. Assumimos, portanto, que a antiga máquina associada a estes dois elementos foi substituída após 1889 pelo pêndulo premiado de A. Mougin. Quanto ao autor do mostrador e da caixa, é muito difícil identificá-lo, já que a assinatura que figurava no centro do mostrador, por trás dos ponteiros, desapareceu quase por completo. Contudo, tendo em conta o estilo e a data de fabrico, conseguimos identificar alguns paralelos em relógios de Charles Balthazar, um também reconhecido mestre relojoeiro do séc. XVIII. Estes detalhes tornam este relógio numa peça duplamente interessante, onde se juntam uma obra de arte do séc. XVIII e um mecanismo de excelência dos finais do séc. XIX. Source: Objaverse 1.0 / Sketchfab
Torsion Pendulum Clock - Animation
This object is a reproduction of the famous torsion pendulum clock. Mesh update with animation 21/11/2021. Texture 2048x2048. 2 Slot materials: one for the mesh and one for the glass. Royalty Free. Source: Objaverse 1.0 / Sketchfab
Penn Station clock
A quick 3D scan of the clock face and sculpture from Baltimore's Pennsylvania Station on North Charles St. Created using 74 photos taken with a DJI Mavic Mini and processed in RealityCapture. Source: Objaverse 1.0 / Sketchfab
Orava clock
ID no. Z–1703 "Orava clock" Museum: Orava Ethnographic Park Museum in Zubrzyca Górna https://muzea.malopolska.pl/en/objects-list/680 Digitalisation: RDW MIC, Małopolska's Virtual Museums project Source: Objaverse 1.0 / Sketchfab
Data from: Phosphorylation, disorder, and phase separation govern the behavior of Frequency in the fungal circadian clock
<p>Circadian clocks are composed of molecular oscillators that pace rhythms of gene expression to the diurnal cycle. Therein, transcriptional-translational negative feedback loops (TTFLs) generate oscillating levels of transcriptional repressor proteins that regulate their own gene expression. In the filamentous fungus Neurospora crassa, the proteins Frequency (FRQ), the FRQ-interacting RNA helicase (FRH) and Casein-Kinase I (CK1) form the FFC complex that represses expression of genes activated by the White-Collar complex (WCC). A key question concerns how FRQ orchestrates molecular interactions at the core of the clock despite containing little predicted tertiary structure. We present the reconstitution and biophysical characterization of FRQ and the FFC in unphosphorylated and highly phosphorylated states. Site-specific spin labeling and pulse-dipolar ESR spectroscopy provides domain-specific structural details on the full-length, 989-residue intrinsically disordered FRQ and the FFC. FRQ contains a compact core that associates and organizes FRH and CK1 to coordinate their roles in WCC repression. FRQ phosphorylation increases conformational flexibility and alters oligomeric state but the changes in structure and dynamics are non-uniform. Full-length FRQ undergoes liquid-liquid phase separation (LLPS) to sequester FRH and CK1 and influence CK1 enzymatic activity. Although FRQ phosphorylation favors LLPS, LLPS feeds back to reduce FRQ phosphorylation by CK1 at higher temperatures. Live imaging of Neurospora hyphae reveals FRQ foci characteristic of condensates near the nuclear periphery. Analogous clock repressor proteins in higher organisms share little position-specific sequence identity with FRQ; yet, they contain amino-acid compositions that promote LLPS. Hence, condensate formation may be a conserved feature of eukaryotic circadian clocks. </p>
Shedding light on the threespine stickleback circadian clock
<p>The circadian clock is an internal timekeeping system shared by most organisms, and knowledge about its functional importance and evolution in natural environments is still needed. Here, we investigated the circadian clock of wild-caught threespine sticklebacks (<i>Gasterosteus aculeatus</i>) at the behavioural and molecular levels. While their behaviour, ecology, and evolution are well studied, information on their circadian rhythms are scarce. We quantified the daily locomotor activity rhythm under a light-dark cycle (LD) and under constant darkness (DD). Under LD, all fish exhibited significant daily rhythmicity, while under DD, only 18% of individuals remained rhythmic. This interindividual variation suggests that the circadian clock controls activity only in certain individuals. Moreover, under LD, some fish were almost exclusively nocturnal, while others were active around the clock. Furthermore, the most nocturnal fish were also the least active. These results suggest that light masks activity (i.e. suppresses activity without entraining the internal clock) more strongly in some individuals than others. Finally, we quantified the expression of five clock genes in the brain of sticklebacks under DD using qPCR. We did not detect circadian rhythmicity, which could either indicate that the clock molecular oscillator is highly light-dependent, or that there was an oscillation but that we were unable to detect it. Overall, our study suggests that a strong circadian control on behavioural rhythms may not necessarily be advantageous in a natural population of sticklebacks and that the daily phase of activity varies greatly between individuals because of a differential masking effect of light.</p>
Adaptation to high-frequency vibrotactile stimulations fails to affect the clock in young children
<p>Dataset for Adaptation to high-frequency vibrotactile stimulations fails to affect the clock in young children.</p>
Data from: Natural Zeitgebers under temperate conditions cannot compensate for the loss of a functional circadian clock in timing of a vital behavior in Drosophila
<p><span>The adaptive significance of adjusting behavioral activities to the right time of the day seems obvious but is under debate. Our data provides evidence that proper timing of eclosion, a vital behavior of the fruit fly <em>Drosophila melanogaster</em>, requires a functional molecular clock under quasi-natural conditions. </span></p> <p><span>We compared eclosion profiles and assessed eclosion rhythmicity in wildtype flies (CS) and clock-related mutant strains <em>(per<sup>01</sup></em>, <em>pdf<sup>01</sup></em>, <em>han<sup>5304</sup></em>) under laboratory and outdoor conditions. In the laboratory, flies were entrained in either light-dark cycle (LD12:12) or warm (25°C)-cold (16°C) cycle (WC12:12), and tested under entrainment or constant conditions using TriKinetics Drosophila Eclosion Monitors. For outdoor assays, a WEclMon system was used and experiments were performed between July-Octobre 2014 and July-Octobre 2016. </span></p> <p><span>Flies with a defective molecular clock showed impaired rhythmicity and gating under natural temperate conditions in Würzburg/Germany even in the presence of a full complement of abiotic Zeitgebers. We also found that eclosion rhythmicity cannot be entrained by daily cycles in relative humidity. Low relative humidity also did not or only weakly affect the ability of the flies to eclose and unfold their wings.</span></p> <p><span>Our results suggest that the presence of natural Zeitgebers is not sufficient, and a functional molecular clock is required to induce stable temporal eclosion patterns in flies under temperate conditions with considerable day-today variation in light intensity and temperature. Temperate Zeitgebers are, however, sufficient to functionally rescue a loss of PDF-signalling.</span></p> <p><span>The data set belongs to the publication:</span></p> <p><em><span>Ruf F, Mitesser O, Mungwa ST, Horn M, Rieger D, Hovestadt T, and Wegener C (2021) Natural Zeitgebers Under Temperate Conditions Cannot Compensate for the Loss of a Functional Circadian Clock in Timing of a Vital Behavior in Drosophila. </span>Journal of Biological Rhythms 36: 271–285. DOI: 10.1177/0748730421998112.</em></p>
Epigenetic clock estimations in patients with isolated REM Sleep Behavior Disorder
<p>Isolated REM Sleep Behavior Disorder (iRBD) is the strongest prodromal marker for conversion to α-synucleinopathies. A continuum between aging and neurodegeneration has been proposed, but this hypothesis has not been tested in iRBD so far. Here we used epigenetic clocks, estimated from DNA methylation arrays using the DNA Methylation Age Calculator available at https://dnamage.genetics.ucla.edu/home, to measure biological aging in videopolysomnography-confirmed iRBD patients (iRBDs, n=28), videopolysomnography-negative controls (CTR_neg; n=57), and controls from the general population (CTR_pop; n=31)<strong>.</strong></p>
ScienceDex guides
Understand access before you commit
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.