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198 results for “Leader”
Supporting information for "Discerning TGF and leader current pulse in ASIM observation"
<p>Data files for the paper "Discerning TGF and leader current pulse in ASIM observation".</p>
Data for "Leader Polarity-Reversal Feature and Charge Structure of Three Upward Bipolar Lightning Flashes"
<p>In a manuscript entitled “Leader Polarity-Reversal Feature and Charge Structure of Three Upward Bipolar Lightning Flashes”,lightning locations,electric field and current data can be obtained through the following attachment.These files can be opened by matlab 2016(or later). The data supports the aforementioned manuscript and can be used freely for scientific purposes with appropriate citation.<br> One thing should be noted that in the files associated with LMA data,five columns represent x,y,z,time and radiation power, respectively.</p>
Properties of negative initial leaders and flash size in a cluster of supercells
<p>The data is associated with the paper titled "Properties of negative initial leaders and flash size in a cluster of supercells" . The abstract is as follows:</p> <p>Properties of negative initial leaders (NILs) and flash size in a cluster of supercells with generally inverted charge structure in Oklahoma on 10−11 May 2010 are examined, primarily using Lightning Mapping Array data. A method to identify NILs from LMA source is proposed. Median values of 18.00 ms, 1.02 km, 0.65 × 10<sup>5</sup> m s<sup>−1</sup>, and 47.24° are found for NIL duration, three-dimensional (3D) displacement, 3D displacement speed, and the angle between the displacement and the vertical directions, respectively. Median NIL speeds initially decrease with increasing height, but begin increasing above 12 km, possibly related to the rapid reduction in air density. The NILs tend to decelerate during the early stage, particularly during the first 6 ms. The NILs in small-size charge regions tend to have low speeds, vice versa. The flash duration, horizontal distance, vertical distance, flash area and flash volume have median values of 0.27 s, 5.54 km, 3.67 km, 9.67 km<sup>2</sup>, and 14.37 km<sup>3</sup>, respectively. All parameters follow lognormal distributions. Most flashes (83.18%) extend primarily in the horizontal direction. Flash area shows an inverse relationship with flash density at their fast changes during storm evolution. Although large flash initiation density (FID) generally occurs in regions with small flash size, the smallest flash size is not collocated with large FID value. Flash duration changes independently of flash area in regions with large FID. A hypothesis is proposed to explain the observations in this study on the correlations among dynamic process, flash activity, flash size, and flash duration.</p>
Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash
<p>The data supports the paper entitled “<a href="https://doi.org/10.1029/2018JD029488">Broadband Characteristics of Chaotic Pulse Trains associated with Sequential Dart Leaders in a Rocket-Triggered Lightning Flash</a>” published in JGR-Atmospheres, and these files can be opened by MATLAB. The data can be used freely for scientific purposes with appropriate citation.</p>
Simulated negative leaders with 100, 200, and 300-A feeding currents
<p>Videos of 3D development of simulated negative stepped leader with a feeding currents of 100, 200, and 300 A. 2D projections of discharge channels on the x-y, x-z, and y-z planes are shown on the right. Leader channel sections (with conductivities larger than or equal to 1 S/m), including the primary negative leader and space leaders, are shown in various shades of red with darker color corresponding to higher channel conductivity. Channels of the negative leader streamer zone (negative corona streamer burst) are shown in light orange. Positive and negative space streamer channels are shown in green and grey, respectively. Black dots denote space stems, and blue and pink dots denote negative and positive space charges forming the leader channel corona sheath, respectively.</p>
Data for "The Spatial Evolution of Upward Positive Stepped Leaders Initiated from a 356-m-High Tower in Southern China"
<p>Here we presented the high-speed video, B-field data and E-field data of two cases (Case 1 & 2) analyzed in a manuscript entitled "The Spatial Evolution of Upward Positive Stepped Leaders Initiated from a 356-m-High Tower in Southern China". The video files can be opened by a software named as 'Phantom Camera Control Application', while the B-field & E-field data can be opende by Matlab. The data supports the aforementioned manuscript and can be used freely for scientific purposes after a request is made to author Mingli Chen.</p>
Needles and Lightning Leader Dynamics Imaged with 100–200 MHz Broadband VHF Interferometry
<p>The data supports the manuscript entitled “Needles and Lightning Leader Dynamics Imaged with 100–200 MHz Broadband VHF Interferometry” that is submitted to GRL. These files can be opened by MATLAB. The data can be used freely for scientific purposes with appropriate citation.</p>
Simulated negative leaders with 100, 200, and 300-A feeding currents
<p>Videos of 3D development of simulated negative stepped leader with a feeding currents of 100, 200, and 300 A. 2D projections of discharge channels on the x-y, x-z, and y-z planes are shown on the right. Leader channel sections (with conductivities larger than or equal to 1 S/m), including the primary negative leader and space leaders, are shown in various shades of red with darker color corresponding to higher channel conductivity. Channels of the negative leader streamer zone (negative corona streamer burst) are shown in light orange. Positive and negative space streamer channels are shown in green and grey, respectively. Black dots denote space stems, and blue and pink dots denote negative and positive space charges forming the leader channel corona sheath, respectively.</p>
Orientation of IBP and Leader Discharges by Magnetic Direction Finder
<p>1. 'CG_0719.mat' is the lightning data of July 19, 2017. Each group of data contains return stroke data.<br> Size: 9x280000x3<br> Sample rate: 20 MHz<br> V123(n,:,1): East-West magnetic field data at Group nth (Unit nT)<br> V123(n,:,2): North-sourth magnetic field data at Group nth (Unit nT)<br> V123(n,:,3): Electric field data at Group nth (Unit V/m)<br> 2. 'IC_0624.mat' is the lightning data of July 19, 2017. Most of the data is IC process<br> Size: 10x92160x3<br> Sample rate: 30 MHz<br> V123(n,:,1): East-West magnetic field data at Group nth (Unit nT)<br> V123(n,:,2): North-sourth magnetic field data at Group nth (Unit nT)<br> V123(n,:,3): Electric field data at Group nth (Unit V/m)</p>
Captains vs. All-Stars: Who makes better leaders?
<p>NBA play-by-play dataset</p>
Interesting Scientific Idea Generation Using Knowledge Graphs and LLMs: Evaluations with 100 Research Group Leaders
<p>Dataset for the Knowledge graph used in the paper "<a href="https://arxiv.org/abs/2405.17044">Interesting Scientific Idea Generation Using Knowledge Graphs and LLMs: Evaluations with 100 Research Group Leaders</a>" by Xueme Gu and Mario Krenn. </p> <p>Nodes represent scientific concepts extracted from 2.44 million paper titles and abstracts and edges are formed when two concepts co-occur in titles or abstracts of over 58 million papers from OpenAlex, augmented with citation information. </p>
Triggering Events, Opinion Leader Networks, and Framing Strategies of Climate Change on Chinese Social Media
Open the record for dataset details and reuse information.
Coordination of movement via complementary interactions of leaders and followers in termite mating pairs.
<p><span><span>Leadership of animal group movements depends on social feedback, hence leader's signals and follower's responses should be attuned to each other. However, leader and follower roles are difficult to disentangle in species with high levels of coordination. To overcome this challenge, we investigated a simple case of movement coordination: termite pairs in which a female leads a male as they search for a nest site. To tease apart leader and follower roles, we created conspecific and heterospecific pairs of <i>Coptotermes gestroi</i> and <i>C. formosanus</i>, which share a pairing pheromone so that males follow females of either species. Conspecific pairs were stable for both species, even though <i>C. gestroi</i> females produce less pheromone than <i>C. formosanus</i>. Heterospecific pairs with <i>C. gestroi</i> males were also stable, but not those with <i>C. formosanus</i> males. We attributed this difference to the <i>C. gestroi</i> male's unique capacity to follow females that release small amounts of pheromone; <i>C. formosanus</i> males cannot follow or reject <i>C. gestroi</i> females as unsuitable. This conclusion was supported by an information-theoretic analysis that detected information flow from female to male in only stable tandems. Despite their following ability, <i>C. gestroi</i> males lost to <i>C. formosanus </i>males in competitions to follow <i>C. formosanus</i> females. Thus, partner selection has shaped the species-specific association of mating pairs. Our results demonstrate that a similar level of coordination can emerge from distinct sets of complementary sender-receiver interactions.</span></span></p>
Negative leader side of lightning development
<p><strong>The video captures an invisible positive leader, only blurred recoil leaders are visible. From T=+0.07 s (1:26) a negative side of the leader is visible. Negative leader branches abundantly, its propagation is faster than the positive leader and contains hot luminous ends. The second visible negative leader starts at T=+0.25 s (1:41). The negative leaders do not generate recoil leaders.</strong></p>
Positive leader side of lightning development and recoil leaders
<p>This video captures (from T=+0.27 s (1:02) to T=+0.40 s (1:12)) a positive side of the lightning leader. When the current flowing through the leader begins to weaken, recoil leaders start to appear at its end (T=+0.38 s (1:10)).</p>
On the Space Leader Evolution During the Breakthrough Phase of Attachment Process in Positive Laboratory Sparks
<p>The data supports the manuscript entitled "On the Space Leader Evolution During the Breakthrough Phase of Attachment Process in Positive Laboratory Sparks." The "Data 1" group contains the discharge current waveform, the normalized gray value, and the synchronized voltage-current-impedance waveform. The files in "Data 1" group can be opened by Excel. The "Data 2" group includes high-speed video frames for five discharge events and they can be opened by Phantom Camera Control (PCC) software. The data can be used freely for scientific purposes with appropriate citation.</p>
Searching for intra-cloud positive leaders in VHF
<p>The data needed for making the figures for the paper that will be submitted for publication in GRL, including the GLE-scipts for making the figures.</p>
First Observation of Dart Leader-M Component Process in a Rocket Triggered Lightning Flash
<p>A rare dart leader (DL)-M component process in a double-branch lightning flash was analyzed through high-speed camera and synchronizing current and electric field data.</p>
Veterans as Leaders in Understanding and Education (VALUE)
ClinicalTrials.gov study NCT00137241. IPD Sharing: Not stated. Countries: 1. Publications: 3.
LEADERS FREE II: BioFreedom™ Pivotal Study
ClinicalTrials.gov study NCT02843633. IPD Sharing: YES. Countries: 7. Publications: 3.
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.