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545 results for “synchronization”
Ensemble synchronization in the reassembly of Hydra's nervous system
<p class="Default">Although much is known about how the structure of the nervous system develops, it is still unclear how its functional modularity arises. A dream experiment would be to observe the entire development of a nervous system, correlating the emergence of functional units with their associated behaviors. This is possible in the cnidarian <i>Hydra vulgaris</i>, which, after its complete dissociation into individual cells, can reassemble itself back together into a normal animal. We used calcium imaging to monitor the complete neuronal activity of dissociated <i>Hydra </i>as they re-aggregated over several days. Initially uncoordinated neuronal activity became synchronized into coactive neuronal ensembles. These local modules then synchronized with others, building larger functional ensembles that eventually extended throughout the entire reaggregate, generating neuronal rhythms similar to those of intact animals. Global synchronization was not due to neurite outgrowth but to strengthening of functional connections between ensembles. We conclude that <i>Hydra's</i> nervous system achieves its functional reassembly through the hierarchical modularity of neuronal ensembles.</p>
Tracing the evolution of short-period binaries with super-synchronous fast-rotators
<p>Dataset for the triple scenario (see Sec. 5 in Britavskiy et al.)<br><br>*_triple.txt contain zero age main sequence triple configurations compatible with the "triple merger scenario" described in the paper.<br>*.npy are binary version of the corresponding txt for faster loading. <br><br>The txt files where generated with <a href="https://zenodo.org/api/records/10028333/draft/files/ML_stability.py/content">ML_stability.py.</a> <br><a href="https://zenodo.org/api/records/10028333/draft/files/plot_P_unstable.py/content">plot_P_unstable.py</a> generates fig. 10 and <a href="https://zenodo.org/api/records/10028333/draft/files/plot_min_a_in.py/content">lot_min_a_in.py</a> fig. 9, the other python files are libraries of functions called by these.<br><a href="https://zenodo.org/api/records/10028333/draft/files/mlp_model_trip_ghost.pkl/content">mlp_model_trip_ghost.pkl</a> is the dynamical stability classifier from <a href="https://ui.adsabs.harvard.edu/abs/2023MNRAS.525.2388V/abstract">Vynatheya et al. 2023</a> (ghost orbit method), used by <a href="https://zenodo.org/api/records/10028333/draft/files/classify_trip.py/content">classify_trip.py</a> to determine the probability of dynamical stability of a given system.</p>
On Synchronization of Wireless Acoustic Sensor Networks in the Presence of Time-varying Sampling Rate Offsets and Speaker Changes
<p>We present an open-source database for evaluation of time synchronization algorithms for wireless acoustic sensor networks . More Information and examples on how to use the database can be found on our GitHub page: <a href="https://github.com/fgnt/paderwasn">https://github.com/fgnt/paderwasn</a></p>
Zum Unterricht: Online-Vorlesungen, synchron und als "Konserve"
<p>"Warum eine synchrone online-Vorlesung mitmachen, wenn man danach die 'Konserve' anhören und ansehen kann?" - eine Antwort und Unterrichtsreflexion im COVID-Zeitalter.</p>
Self-synchronized cost-effective time-resolved measurements at x-ray free-electron lasers with femtosecond resolution
<p>In compliance with guidelines from SNSF (Swiss National Science Foundation), we upload the raw data that belongs to a publication we submitted to <em>Physical Review Research</em>.<br> The dataset also contains the analysis scripts used to produce the plots we show in the publication.</p> <p>Our software is attached to the dataset. An installation of the well known ELEGANT code is required to run it.</p> <p>Shortly after upload of the first version of this dataset, a bug was found in the analysis software.<br> The second version contains the corrected software.</p>
Ripples reflect a spectrum of synchronous spiking activity in human anterior temporal lobe
<p>Direct brain recordings have provided important insights into how high-frequency activity captured through intracranial EEG (iEEG) supports human memory retrieval. The extent to which such activity is comprised of transient fluctuations that reflect the dynamic coordination of underlying neurons, however, remains unclear. Here, we simultaneously record iEEG, local field potential (LFP), and single unit activity in the human temporal cortex. We demonstrate that fast oscillations within the previously identified 80–120 Hz ripple band contribute to broadband high-frequency activity in the human cortex. These ripple oscillations exhibit a spectrum of amplitudes and durations related to the amount of underlying neuronal spiking. Ripples in the macro-scale iEEG are related to the number and synchrony of ripples in the micro-scale LFP, which in turn are related to the synchrony of neuronal spiking. Our data suggest that neural activity in the human temporal lobe is organized into transient bouts of ripple oscillations that reflect underlying bursts of spiking activity.</p>
Data for: Pericytes' Circadian Clock Affects Endothelial Cells' Synchronization and Angiogenesis in a 3D Tissue Engineered Scaffold
<p>Raw data set and analysis files for Mastrullo et al., Frontiers in Pharmacology, 2022 <strong>DOI:</strong> 10.3389/fphar.2022.867070 </p>
Supporting Information for "Geochemical evidence for diachronous uplift and synchronous collapse of the high elevation Variscan hinterland"
<p>Supplemental data for GLR manuscript submission.</p>
A synchronized estimation of hourly ground-level concentrations of six criteria air pollutants in China using data from the first geostationary air-quality monitoring satellite
<p>This dataset provides the ground-level concentrations of six criteria air pollutants estimated from the first geostationary air quality monitoring satellite GEMS with a multi-output random forest model.</p>
Diurnal- and zonal-mean (DZM), and solar-synchronous tidal components, of Ar and N2 densities in Mars thermosphere
<p>This data set consists of diurnal- and zonal-mean (DZM) amplitudes, and DW1 and SW2 amplitudes and phases, of Ar and N2 densities derived from multi-year binning, averaging and sinusoidal decomposition of measurements made by the NGIMS instrument on the MAVEN satellite at Mars.</p> <p>The data are provided as a function of height (every 5 km, 160-250 km), latitude (60S-60N) and Ls (0-360) in 6 IDL .sav files.</p> <p>More details are found in the README_AllC_DZM_MIG.txt file, including information on how to read the files.</p> <p>This data set is made available in connection with the following publication: </p> <p>Forbes, J.M., Zhang, X., Fang, X., and Benna, M. (2024). Zonal-mean N2 and Ar Densities and Temperatures in Mars Thermosphere from MAVEN. Journal of Geophysical Research: Space Physics, 129, e2024JA032979. https://doi.org/10.1029/2024JA032979</p>
Synchronous Activity-Space Segregation: Simulated Data
<p>Simulations of full census populations of Buffalo and Utica, New York, doing Levy flights along street networks.</p>
Real‐time fiber‐based fluorescence lifetime imaging with synchronous external illumination: A new path for clinical translation
<p>Time-correlated single photon counting is the “gold-standard” method for fluorescence lifetime measurements and has demonstrated potential for clinical deployment. Its clinical adoption is hindered by the use of high gain detectors, which make the fluorescence acquisition impractical with bright lighting conditions such as in clinical settings. We address this limitation by interleaving periodic fluorescence detection with synchronous out-of-phase externally modulated light source, thus guaranteeing specimen illumination and a fluorescence signal free from bright background light upon temporal separation. Fluorescence lifetime maps are generated in real-time from single-point measurements by tracking a reference beam and using the phasor approach. We demonstrate the feasibility and practicality of this technique in a number of biological specimens, including real-time mapping of degraded articular cartilage. This method is compatible and can be integrated with existing clinical microscopic, endoscopic and robotic modalities, thus offering a new pathway towards label-free diagnostics and surgical guidance in a number of clinical applications.</p>
Satellite-ground synchronous in-situ dataset of water optical parameters and surface temperature for typical lakes in China
<p>Remote sensing technology has the potential to significantly enhance the lakes large-scale and long-term dynamic monitoring capabilities. High-quality in-situ datasets are essential for improving the accuracy and reliability of remote sensing retrieval of water optical parameters. This dataset provides satellite-ground synchronized in-situ data on water optical parameters for typical lakes in China spanning the period between 2020 and 2023. The dataset includes quality-checked remote sensing reflectance ( ) data and water optical parameter data for chlorophyll-a (Chl-a), total suspended matter (TSM), Secchi disk depth (SDD), andwater surface temperature (WST). It encompasses 586 sampling points across 18 lakes. The dataset exhibits two significant highlights: Firstly, synchronous observations from multiple satellites are coordinated during the data collection process, effectively supporting the retrieval and validation of water remote sensing products. Secondly, it encompasses diverse data types, collecting synchronous measurements of and various water optical parameters. This dataset will be continuously updated, thereby making a substantial contribution to enhancing regional and global lake monitoring capabilities through satellite remote sensing data.</p>
GPS-synchronized recordings of 10 MHz during October 2, 2024 eclipse from Tortel, Aysén, Chile
Open the record for dataset details and reuse information.
GPS-synchronized recordings of 15 MHz during October 2, 2024 eclipse from Tortel, Aysén, Chile
Open the record for dataset details and reuse information.
MASCS 1.0: Synchronous atmospheric and oceanic data from a cross-shaped moored array in the northern South China Sea during 2014–2015
<p>This work presents a cross-shaped moored array dataset (MASCS 1.0) comprising five buoys and four moorings with synchronous atmospheric and oceanic data in the northern South China Sea during 2014–2015. The atmospheric data are observed by two meteorological instruments at the buoys. The oceanic data consist of sea surface waves measured using a wave recorder, temperature, and salinity from the surface to a depth of 400 m, and at 10 and 50 m above the ocean bottom using conductivity, temperature, and depth recorders. It also includes currents from the surface to a depth of 850 m measured using acoustic Doppler current profilers and measured at 10, 50, and 100 m above the floor using current meters. Additional measurements were taken for sea surface radiation, air visibility, chlorophyll, turbidity, and chromophoric dissolved organic matter at buoy 3, located at the center of the moored array. The data reveals air–sea interactions and oceanic processes in the upper and bottom ocean, especially the transition of the air–sea interface and ocean conditions from summer to winter monsoon and the effects of six tropical cyclones on the moored array. Multiscale processes were also recorded, such as air–sea fluxes, tides, internal waves, and low-frequency flows. The data are valuable and have many potential applications, including analyzing the phenomena and mechanisms of air–sea interactions and ocean dynamics and validating and improving numerical model simulations, data reanalysis, and assimilations.</p>
Raw data for the article: A commentary on "Simultaneous versus staged resection for synchronous colorectal liver metastases: A population-based cohort study". Importance of avoiding any other additional risk in selected patients with synchronous colorectal liver metastases
<p>We read with great interest the article of Dr. Bogach and Colleagues, in which they have evaluated trends of resection for synchronous colorectal cancer liver metastases (CRLM) and associated patient outcomes with a retrospective cohort study from 2006 to 2015 in the province of Ontario, Canada.</p>
Synchronized Flight Videos for NASA CAMP²Ex
<p>Synchronized flight videos for the NASA CAMP²Ex (The Cloud, Aerosol and Monsoon Processes Philippines Experiment). Each video includes 1) P-3 flight track overlay HIMAWARI RGB imagery if available (or HIMAWARI cloud optical thickness retrievals); 2) time series of a) aircraft irradiance observations from SSFR and SPN-S and b) irradiance simulations based on HIMAWARI L2 cloud product using EaR³T (Education and Research 3D Radiative Transfer Toolbox, <a href="https://github.com/hong-chen/er3t">https://github.com/hong-chen/er3t</a>). Details can be found in paper - "The Education and Research 3D Radiative Transfer Toolbox (EaR³T) – Towards the Mitigation of 3D Bias in Airborne and Spaceborne Passive Imagery Cloud Retrievals".</p>
Unintentional synchronization with self-avatar for upper-and lower-body movements
<p>The subjective experience of embodying an avatar when immersed in virtual reality (VR) is known to support the sense of<br> presence and to help with the interaction in a virtual environment. Virtual embodiment is often thought of as the consequence of a replacement of the physical body by a virtual one, with a sense of agency for the avatar obtained by making the avatar’s body follow the user’s movements. This unidirectional motor link was however challenged by studies observing the opposite effect under different circumstances, for example in a slow-motion context or when an arm movement was snapped on a predefined axis. These reports are however still rare or anecdotal. With the idea of a generalized bidirectional relationship between user and avatar in mind, we established a methodology to systematically provoke and study the circumstances under which participants follow the movements of their avatar during long repetitive movements without having been instructed to do so. A preliminary study confirmed that our virtual experimental setup, using full-body motion capture, avatar animation and virtual mirrors, supports a strong sense of agency and body ownership for the avatar while enabling the experimental manipulation of the avatar’s movement. In the main experimental study, where participants performed repetitive upper- and lower- body movements while their avatar animation was either congruent or out-of-phase, we observed that almost all participants synchronized with their avatar at least once, for ~47% of trials for lower limb movements and ~38% for upper limb movements. Participants still reported low agency and ownership for the avatar under the incongruent condition but, most interestingly, some of them also reported that their movements were not influenced by the avatar despite the behavioural effect. Our methodological approach and results contribute to a characterization of the conditions of occurrence of the self-avatar<br> follower effect, and thereby to identify enriched interaction design for VR involving complex avatar-user mutual interdependencies.</p>
Data for: Butterfly foraging is remarkably synchronous in an experimental tropical macrocosm
<p><span>Diel patterns in foraging activity are dictated by a combination of abiotic, biotic, and endogenous limits. Understanding these limits is important for insects because ectotherm taxa will respond more pronouncedly to ongoing climatic change, potentially affecting crucial ecosystem services. We leverage an experimental macrocosm, the Montreal Insectarium Grand Vivarium, to test the importance of endogenous mechanisms in determining temporal patterns in foraging activity of butterflies. Specifically, we assessed the degree of temporal niche partitioning among 24 butterfly species originating from the Earth's tropics within controlled environmental conditions. We found strong niche overlap, with the frequency of foraging events peaking around solar noon for 96% of the species assessed. Our models suggest that this result was not due to the extent of cloud cover, which affects radiational heating and thus limits body temperature in butterflies. Together, these findings suggest that an endogenous mechanism evolved to regulate the timing of butterfly foraging activity within suitable environmental conditions. Understanding similar mechanisms will be crucial to forecast the effects of climate change on insects, and thus on the many ecosystem services they provide.</span></p>
ScienceDex guides
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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.