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35 results for “ballistic”
EXTREMA: Ballistic capture sets at Mars over an Earth–Mars synodic period from January 1, 2030, to February 20, 2032
<p>EXTREMA (short for Engineering Extremely Rare Events in Astrodynamics for Deep-Space Missions in Autonomy) enables self-driving spacecraft, challenging the current paradigm under which spacecraft are piloted in the interplanetary space. Deep-space guidance, navigation, and control applied in a complex scenario is the subject of EXTREMA, which wants to engineer ballistic capture in a totally autonomous fashion. EXTREMA is erected on three pillars. Pillar 1 is on autonomous navigation. Pillar 2 involves autonomous guidance and control. Pillar 3 deals with autonomous ballistic capture, the focus of this work. The project has been awarded a European Research Council (ERC) Consolidator Grant in 2019.</p> <p>In Pillar 3 it is investigated how a spacecraft can attain ballistic capture in autonomy. Ballistic capture is an event that occurs in extremely-rare occasions, and requires acquiring a proper state (position, velocity) far away from the target planet [1]. Massive numerical simulations are required to find the specific conditions that support capture [2]. On average, 1 out of 10,000 conditions explored by the algorithm grants capture [3]. The union of these points defines the capture set, which in turn is used to find the capture corridors: these are streams of orbits that can be targeted far away from the planet and that guarantee ballistic capture.</p> <p>The data set contains the initial conditions of weakly-stable, unstable, crash, moon-crash, and capture sets at Mars with initial epochs uniformly distributed from 01 JAN 2030 12:00:00.000 (UTC) to 20 FEB 2032 10:32:39.144 (UTC), covering a complete Earth–Mars synodic period of approximately 780 days. The grid of initial conditions is built to maximize the capture ratio for Mars (see Figure 10 in [3]). Initial conditions are propagated in high-fidelity. The equations of motion of the restricted n-body problem are considered. The gravitational attractions of the Sun, Mercury, Venus, Earth (B*), Mars (central body), Jupiter (B), Saturn (B), Uranus (B), and Neptune (B) are taken into account. Additionally, solar radiation pressure, Mars’ non-spherical gravity, and relativistic corrections [4] (Schwarzschild solution, geodesic precession, and Lense-Thirring precession) are also included in the model.</p> <p>For additional information about the EXTREMA project visit the page <a href="http://extrema.polimi.it">extrema.polimi.it</a>.</p> <p><strong>References</strong><br> [1] F. Topputo and E. Belbruno,'Earth–Mars transfers with ballistic capture', Celestial Mechanics and Dynamical Astronomy, Vol. 121, No. 4, 2015, pp. 329–346. DOI: <a href="http://doi.org/10.1007/s10569-015-9605-8">10.1007/s10569-015-9605-8</a>.<br> [2] F. Topputo and E. Belbruno, 'Computation of weak stability boundaries: Sun–Jupiter system', Celestial Mechanics and Dynamical Astronomy, Vol. 105, No. 1-3, 2009, pp. 3–17. DOI: <a href="http://doi.org/10.1007/s10569-009-9222-5">10.1007/s10569-009-9222-5</a><br> [3] Z.-F. Luo and F. Topputo, 'Analysis of ballistic capture in Sun–planet models', Advances in Space Research, Vol. 56, No. 6, 2015, pp. 1030–1041. DOI: <a href="http://doi.org/10.1016/j.asr.2015.05.042">10.1016/j.asr.2015.05.042</a><br> [4] C. Huang, J. C. Ries, B. D. Tapley, and M. M.Watkins, 'Relativistic effects for near-earth satellite orbit determination', Celestial Mechanics and Dynamical Astronomy, Vol. 48, No. 2, 1990, pp. 167–185. DOI: <a href="http://doi.org/10.1007/BF00049512">10.1007/BF00049512</a></p> <p>* Here B stands for barycenter.</p>
Supplemental Data Sets for "Buried Ice Deposits in Lunar Polar Cold Traps were Disrupted by Ballistic Sedimentation"
<p>Supporting Data Sets for manuscript "Buried Ice Deposits in Lunar Polar Cold Traps were Disrupted by Ballistic Sedimentation". Contains Data Sets S1-S7 as described in the manuscript and Supplementary information S1 (see <a href="https://doi.org/10.1029/2022JE007567">https://doi.org/10.1029/2022JE007567</a>).</p>
Ballistic capture sets at Mars using Differential Algebra with initial epoch December 9, 2023
<p>The data set is made of two items containing initial sub-domains of inconsistent, weakly-stable, unstable, crash, moon-crash, and capture sets at Mars [1]. They are compressed files that contain a classification of the sub-domains of the search-space defined and used to compute the consistency and quality criteria of the differential algebra mapping, as well as graphical representations of the search space. All initial sub-domains have initial epoch 09 DEC 2023 00:45:18.363 (UTC). The search space is built to maximize the capture ratio for Mars (see Figure 10 in [2]). Initial sub-domains are propagated in high-fidelity. The equations of motion of the restricted n-body problem including solar radiation pressure are considered. The first item contains a low-resolution mapping. The search space is divided 32 times along the radius of the periapsis and the argument of the periapsis. The maximum depth of the Automatic Domain Splitting algorithm is 9 splits [3]. The first item contains a high-resolution mapping. The search space is divided 128 times along the radius of the periapsis and the argument of the periapsis. The maximum depth of the Automatic Domain Splitting algorithm is 10 splits [3].</p> <p>The data set is associated to the following journal article:</p> <ul> <li> Article: Stable sets mapping with Taylor differential algebra with application to ballistic capture orbits around Mars</li> <li> Journal: Celestial Mechanics and Dynamical Astronomy</li> <li> Authors: Thomas Caleb (corresponding author: thomas.caleb@student.isae-supaero.fr), Gianmario Merisio, Pierluigi di Lizia, and Francesco Topputo</li> <li> DOI: <a href="https://www.doi.org/10.1007/s10569-022-10090-8">10.1007/s10569-022-10090-8</a></li> </ul> <p><strong>References</strong><br> [1] F. Topputo and E. Belbruno,'Earth–Mars transfers with ballistic capture', Celestial Mechanics and Dynamical Astronomy, Vol. 121, No. 4, 2015, pp. 329-346. DOI: <a href="https://doi.org/10.1007/s10569-015-9605-8">10.1007/s10569-015-9605-8</a><br> [2] Z.-F. Luo and F. Topputo, 'Analysis of ballistic capture in Sun–planet models', Advances in Space Research, Vol. 56, No. 6, 2015, pp. 1030-1041. DOI: <a href="https://doi.org/10.1016/j.asr.2015.05.042">10.1016/j.asr.2015.05.042</a><br> [3] A. Wittig, P. Di Lizia, et al., Propagation of large uncertainty sets in orbital dynamics by automatic domain splitting', Celestial Mechanics and Dynamical Astronomy, Vol. 122, No. 3, 2015, pp. 239-261. DOI: <a href="https://doi.org/10.1007/s10569-015-9618-3">10.1007/s10569-015-9618-3</a></p>
Isolated Ballistic Non-Abelian Interface Channel
<p>Dataset for B. Dutta et al., "Isolated Ballistic Non-Abelian Interface Channel".</p> <p>The following datafiles are used for the figures in main text and supplementary materials.</p>
Shadow-wall lithography of ballistic superconductor-semiconductor quantum devices
<p>This repository contains data sets that support the conclusions and figures in the manuscript "Shadow-wall lithography of ballistic superconductor-semiconductor quantum devices".</p> <p>The Jupyter notebook "Manuscript figures.ipynb" contains all the necessary scripts to generate the figures. The measurement data is contained in the "Data" folder.</p>
Imaging the Breaking of Electrostatic Dams in Graphene for Ballistic and Viscous Fluids
<p>These datasets can be used to reproduce the experimental and theoretical results in the manuscript "Imaging the Breaking of Electrostatic Dams in Graphene for Ballistic and Viscous Fluids," and corresponding supplementary material. </p> <p>"STP-measurement1" and "STP-measurement2" contain the raw scanning tunneling potentiometry (STP) data used to generate Figures 1-4 in the main text and Figures S2-5 in the supplement. Each ".dat" file contains the tunneling I-V curve used to solve for the electrochemical potential at a single pixel in each STP dataset. </p> <p>"Estimation of c_G.nb" contains the raw Mathematica code to generate Figure 5 in the main text and Figures S7-8 in the supplement.</p> <p>"device-resistance_gate-sweep_T=4.5K.txt" and "device-resistance_gate-sweep_T=77K.txt" can be used to reproduce Figure S1 in the supplement. </p> <p> </p>
EXTREMA: Ballistic capture sets at Mars with initial epoch December 9, 2023
<p>EXTREMA (short for Engineering Extremely Rare Events in Astrodynamics for Deep-Space Missions in Autonomy) enables self-driving spacecraft, challenging the current paradigm under which spacecraft are piloted in the interplanetary space. Deep-space guidance, navigation, and control applied in a complex scenario is the subject of EXTREMA, which wants to engineer ballistic capture in a totally autonomous fashion. EXTREMA is erected on three pillars. Pillar 1 is on autonomous navigation. Pillar 2 involves autonomous guidance and control. Pillar 3 deals with autonomous ballistic capture, the focus of this work. The project has been awarded a European Research Council (ERC) Consolidator Grant in 2019.</p> <p>In Pillar 3 it is investigated how a spacecraft can attain ballistic capture in autonomy. Ballistic capture is an event that occurs in extremely-rare occasions, and requires acquiring a proper state (position, velocity) far away from the target planet [1]. Massive numerical simulations are required to find the specific conditions that support capture [2]. On average, 1 out of 10,000 conditions explored by the algorithm grants capture [3]. The union of these points defines the capture set, which in turn is used to find the capture corridors: these are streams of orbits that can be targeted far away from the planet and that guarantee ballistic capture.</p> <p>The data set is made of two items containing initial conditions of weakly-stable, unstable, crash, moon-crash, and capture sets at Mars. The first is a text file containing initial conditions used to compute time regressions. The second item is a text file containing 100,000 initial conditions generated randomly in the search space and used to compute the quality criterion of the differential algebra mapping. All initial conditions have initial epoch 09 DEC 2023 00:45:18.363 (UTC). The grid of initial conditions is built to maximize the capture ratio for Mars (see Figure 10 in [3]). Initial conditions are propagated in high-fidelity. The equations of motion of the restricted n-body problem including solar radiation pressure are considered.</p> <p>For additional information about the EXTREMA project visit the page <a href="http://extrema.polimi.it">extrema.polimi.it</a>.</p> <p>The data set is associated to the following journal article:</p> <ul> <li> Article: Stable sets mapping with Taylor differential algebra with application to ballistic capture orbits around Mars</li> <li> Journal: Celestial Mechanics and Dynamical Astronomy</li> <li> Authors: Thomas Caleb (corresponding author: thomas.caleb@student.isae-supaero.fr), Gianmario Merisio, Pierluigi di Lizia, and Francesco Topputo</li> <li> DOI: <a href="https://www.doi.org/10.1007/s10569-022-10090-8">10.1007/s10569-022-10090-8</a></li> </ul> <p><strong>References</strong><br> [1] F. Topputo and E. Belbruno,'Earth–Mars transfers with ballistic capture', Celestial Mechanics and Dynamical Astronomy, Vol. 121, No. 4, 2015, pp. 329–346. DOI: <a href="http://doi.org/10.1007/s10569-015-9605-8">10.1007/s10569-015-9605-8</a>.<br> [2] F. Topputo and E. Belbruno, 'Computation of weak stability boundaries: Sun–Jupiter system', Celestial Mechanics and Dynamical Astronomy, Vol. 105, No. 1-3, 2009, pp. 3–17. DOI: <a href="http://doi.org/10.1007/s10569-009-9222-5">10.1007/s10569-009-9222-5</a>.<br> [3] Z.-F. Luo and F. Topputo, 'Analysis of ballistic capture in Sun–planet models', Advances in Space Research, Vol. 56, No. 6, 2015, pp. 1030–1041. DOI: <a href="http://doi.org/10.1007/s10569-009-9222-5">10.1016/j.asr.2015.05.042</a>.</p>
Raw images corresponding to article "Relative assessment of cloth mask protection against ballistic droplets: a frugal approach"
<p>The images correspond to scans used to obtain the data reported on V. Márquez-Alvarez, J. Amigó-Vega, A. Rivera, A. J. Batista-Leyva, and E. Altshuler, <em>Relative assessment of cloth mask protection against ballistic droplets: A frugal approach</em>. PLOS ONE 17, e0275376 (2022). doi: <a href="https://doi.org/10.1371/journal.pone.0275376">10.1371/journal.pone.0275376</a>.</p>
Ballistic high powered spider webs overcome dangerous prey defenses
<p>Spiders exhibit a remarkable range of silk-based predatory tactics, but usually avoid capturing ants since they are highly defended. Here we report on a spider that exclusively hunts aggressive <em>Oecophylla</em> ants by isolating and immobilising individual workers using a extraordinary ballistic snare that lures ants, then propels them into its core web at extreme speed. By serial arrangements of tension lines, small pre-strains of the silk are sufficient to reach power densities of up to two megawatts per kilogram actuator mass, which surpasses the performance of other natural spring-actuated systems. Thus, the ultimate prey specialisation in these spiders has led to the evolution of extreme web performance.</p>
Geometric focusing of supercurrent in hourglass-shaped ballistic Josephson junctions
<p>Dataset and code for publication "Geometric focusing of supercurrent in hourglass-shaped ballistic Josephson junctions"</p>
"Pitch-angle of FSP before and after ballistic impact on plate captured by high-speed camera 1: Video (configuration 2)".
<p>The figure reveals that the pitch-angle of a 12.7mm FSP both before and after the ballistic impact on an Aluminum plate is low.</p>
Ballistic dial sight
18th century, Berlin Jagiellonian University Museum Collegium Maius The presented object is a ballistic kit used in field artillery for aiming and setting the target axis of the cannon. It consists of two elements: a sight and a quadrant, stored in a wooden case. The two-part sight has an extendable middle element, scaled in the range of 1–13 inches with 1/4-inch accuracy. Three vision holes enable the height of the points describing the target to be specified. The kit was placed on the cannon's sight and verticalised using a large pointer. Inventory number: 4135; 135/V https://muzea.malopolska.pl/en/objects-list/2728 Source: Objaverse 1.0 / Sketchfab
Ballistic and anemochoric properties of Heracleum sosnowskyi seeds
<p>Баллистические и анемохорные показатели семян Heracleum sosnowskyi.<br> Растительная диаспора, собранная в Сыктывкаре с 5 по 13 октября 2019 <br> г. Сбор семян осуществлялся в четырех точках: ул. Петрозаводская., 120 (га, <br> гг); ул. Колчева., 23 (ТН); ул. Карла Маркса, д., d. 145 (SJ); припаркуйтесь к ним.<br> Киров (СВ).</p> <p>Сбор данных осуществлялся студентами Сыктывкарского государственного университета имени Питирима Сорокина: Газизовой Ольгой, Голке Григорием, Гориновой Анастасией, Васильевым Александром, Серебряковой Валерией, Смотриной Юлией, Турьевой Евой Натальей.</p>
Ballistic and anemochoric characteristics of Heracleum sosnowskyi seeds (2021)
<pre>Ballistic and anemochoric characteristics of Heracleum sosnowskyi seeds in the vicinity of the city of Syktyvkar (2021)</pre>
Data underlying "Ballistic superconductivity in semiconductor nanowires"
<p>This repository contains the raw data underlying <a href="https://dx.doi.org/10.1038/ncomms16025">H. Zhang <em>et al</em>. Ballistic superconductivity in semiconductor nanowires. Nat. Commun. <strong>8,</strong> 16025 (2017)</a></p> <p>It also contains python notebooks for plotting data as shown in the paper, as well as additional plots, developed in 2022.</p>
Data and code for "A ballistic graphene superconducting microwave circuit"
<p>Data and processing for "A ballistic graphene superconducting microwave circuit"</p>
Data for "Clean ballistic quantum point contact in SrTiO3"
<p>Spreadsheets containing raw data, axis and trace labels from submitted manuscript "Clean ballistic quantum point contact in SrTiO<sub>3</sub>".</p>
Dataset accompanying "Ballistic Majorana nanowire devices"
<p>Measurement data, data processing and figure generating scripts for Gül et al. "Ballistic Majorana nanowire devices", Nature Nanotechnology 13, 192 (2018). <br> <br> The extended repository contains all the data measured in the context of the experiment (i.e. all measurements from a chip where at least one measurement was part of the paper), that is, more data sets than shown in the paper.</p>
Laparoscope Combined Ureteroscopic Air-pressure Ballistic Lithotripsy to Treat Patients With Hepatolithiasis
ClinicalTrials.gov study NCT02127242. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Ballistic Strength Training in Stroke: A Pilot Study
ClinicalTrials.gov study NCT01958736. IPD Sharing: Not stated. Countries: 1. Publications: 1.
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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.