cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.48577/jpl.62mqvh
title: The Unusual Broadband X-ray Spectral Variability of NGC 1313 X-1 seen with XMM-Newton, Chandra and NuSTAR

description: We present results from the major coordinated X-ray observing program on the ULX NGC1313 X-1 performed in 2017, combining XMM-Newton, Chandra and NuSTAR, fo- cusing on the evolution of the broadband (∼0.3–30.0 keV) continuum emission. Clear and unusual spectral variability is observed, but this is markedly suppressed above ∼10–15 keV, qualitatively similar to the ULX Holmberg IX X-1. We model the multi-epoch data with two- component accretion disc models designed to approximate super-Eddington accretion, allow- ing for the possibility of both a black hole and a neutron star accretor. With regards to the hot- ter disc component, the data trace out two distinct tracks in the luminosity–temperature plane, with larger emitting radii and lower temperatures seen at higher observed fluxes. Despite this apparent anti-correlation, each of these tracks individually shows a positive luminosity– temperature relation. Both are broadly consistent with L ∝ T4, as expected for blackbody emission with a constant emitting area, and also with L ∝ T2, as may be expected for an advection-dominated disc around a black hole. We consider a variety of different possibili- ties that may explain this unusual behaviour. Scenarios in which the innermost flow is sud- denly blocked from view by outer regions of the super-Eddington disc/wind can explain the luminosity–temperature behaviour, but are difficult to reconcile with the lack of strong vari- ability at higher energies, assuming that this emission arises from the most compact regions. Instead, we may be seeing evidence for further radial stratification of the accretion flow than is included in the simple models considered, with a combination of winds and advection re- sulting in the suppressed high-energy variability.
DOI: 10.25549/independent-c69-45273
title: Attorney work product (3 of 3), 1980 - 1991 May 28

description: Attorney Work Product (3 of 3): (1) File Index, (2) Attorney Notes, (3) Internal Skadden Memos, (4) Draft Documents, (5) Participant's List, 1980 - 1991 May 28. PART OF A SERIES: To better understand how LAPD management reacts to problem officers, Skadden, Arps, Slate, Meagher & Flom examined the Department's procedures regarding the identification, documentation, and response to personnel complaints. The series includes memoranda and correspondence; attorney notes; materials related to the firm's administrative capacities, including staff rosters and work plans; flow charts that illustrate the LAPD's structure and organization; and draft copies of the firm's contributions to the Commission report.
DOI: 10.48577/jpl.sw0rzx
title: Ground Deformation Data from GEER Investigations of Ridgecrest Earthquake Sequence

description: Following the Ridgecrest Earthquake Sequence, consisting of a M6.4 foreshock and M7.1 mainshock along with many other foreshocks and aftershocks, the Geotechnical Extreme Events Reconnaissance (GEER) Association deployed a team to gather perishable data. The team focused their efforts on documenting ground deformations including surface fault rupture south of the Naval Air Weapons Station China Lake, and liquefaction features in Trona and Argus. The team published a report within two weeks of the M7.1 mainshock. This paper presents data products gathered by the team, which are now published and publicly accessible. The data products presented herein include ground-based observations using GPS trackers, digital cameras, and hand measuring devices, as well as UAV-based imaging products using Structure from Motion to create point clouds and digital surface models. The paper describes the data products, as well as tools available for interacting with the products.
DOI: 10.15468/dl.s6eerj
title: Occurrence Download

description: A dataset containing 4 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium prianganense J.J.Wood & J.B.Comber"
 ]
}

 The dataset includes 4 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170027-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-45274
title: Attorney work product (3 of 3), 1980 - 1991 May 28

description: Attorney Work Product (3 of 3): (1) File Index, (2) Attorney Notes, (3) Internal Skadden Memos, (4) Draft Documents, (5) Participant's List, 1980 - 1991 May 28. PART OF A SERIES: To better understand how LAPD management reacts to problem officers, Skadden, Arps, Slate, Meagher & Flom examined the Department's procedures regarding the identification, documentation, and response to personnel complaints. The series includes memoranda and correspondence; attorney notes; materials related to the firm's administrative capacities, including staff rosters and work plans; flow charts that illustrate the LAPD's structure and organization; and draft copies of the firm's contributions to the Commission report.
DOI: 10.48577/jpl.tzggwp
title: Global Cloud Property Models for Real Time Triage Onboard Visible-Shortwave Infrared Spectrometers

description: New methods for optimizing data storage and transmission are required as orbital imaging spectrometers collect and downlink larger data volumes due to increases in optical efficiency and resolution. For missions investigating Earth surface reflectance, excising cloud-contaminated data during acquisition can significantly improve the overall science yield for missions with a fixed downlink budget. Algorithms that consider threshold-based screening are able to operate at the acquisition rate of the instrument but require an accurate and comprehensive prediction of cloud and surface brightness. Previous studies have not conducted a comprehensive analysis of a global dataset to provide appropriate thresholds for screening clouds or to predict performance. To address this concern, we present an analysis with the Hyperion imaging spectrometer’s historical archive of global Earth reflectance data. We selected a diverse subset spanning space (in latitude including the tropics, midlatitudes, arctic, and Antarctic), time (2005-2017), and wavelength (400 – 2500 nm) to assure that the distributions of cloud data are representative of all cases. We fit models of cloud reflectance properties gathered from the subset to predict globally applicable thresholds. The distributions relate cloud reflectance properties to various surface types (land, water, and snow) and latitudinal zones. Models based on this dataset will be used to screen clouds onboard orbital imaging spectrometers, effectively doubling the yield of usable science data per downlink
DOI: 10.48577/jpl.lrsuvp
title: Lessons from the Dawn mission to Ceres and Vesta

description: The Dawn mission orbited and explored Ceres and Vesta, the two largest objects in the main asteroid belt. One of the key enabling technologies was solar electric propulsion. After more than 11 years in flight, Dawn completed operations in October 2018. I describe some lessons from the perspective of chief engineer and mission manager/mission director.
DOI: 10.25549/independent-c69-46242
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.lf710w
title: The strong impact of weak horizontal convergence on continental shallow convection

description: Idealized large-eddy simulation (LES) is a basic tool for studyingthree-dimensional turbulence in the planetary boundary layer. LESis capable to provide benchmark solutions for parameterizationdevelopment efforts. However, real small-scale atmospheric flows developin heterogeneous and transient environments with locally-varyingvertical motions inherent to open multi-scale interactive dynamicalsystems. These variations are often too subtle to be detected bystate-of-the-art remote and in-situ measurements, and are typicallyexcluded from idealized simulations. The present study addressesthe impact of weak (i.e., $\mathcal{O}(10^{-6})$~s$^{-1}$) short-livedlow-level convergence/divergence perturbations on LES of the continentalshallow convection diurnal cycle.The results show a strong response of shallow nonprecipitatingconvection to the applied weak dynamical forcing. Evolutions ofCAPE, mean liquid water path, and cloud top heights are significantlyaffected by the imposed convergence/divergence. In contrast, evolvingcloud base properties, such as the area coverage and mass flux, areonly weakly affected. To contrast those impacts with microphysicalsensitivity, the baseline simulations are perturbed assuming differentobservationally-based cloud droplet number concentrations and thusdifferent rainfall. For the tested range of microphysical perturbations,the imposed convergence/divergence provides significantly largerimpact than changes in the cloud microphysics. Simulationresults presented here provide a stringent test for convectionparameterizations, especially important for large-scale modelsprogressing towards resolving some nonhydrostatic effects.
DOI: 10.15468/dl.bxhvbp
title: Occurrence Download

description: A dataset containing 46 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium polytrichum Ames"
 ]
}

 The dataset includes 46 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170018-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.197vlo
title: Line list of 12CH4 in the 4300-4600 cm-1 region

description: Four spectra of normal samples of CH4 in the 4300-4600 cm-1 region were recorded by using a Fourier transform spectrometer in Reims, France at long paths (202 m, 602 m, 1604 m, and 1804 m) and different pressures. Additional spectra of 12CH4 covering the same region were obtained at 80-123 K, and 93 m path length at SOLEIL Synchrotron in Paris for different pressures and were used to measure low-J lines. Line positions and intensities were retrieved by non-linear least-squares curve-fitting procedures and analyzed using effective Hamiltonian and effective dipole transition moment models. A new measured line list contains positions and intensities for 14151 absorption features. Quantum assignments were made for more than 10304 transitions of 12CH4, which represent ~99% of the integrated line intensity observed in this region. Some 1699 hot band transitions for (Dyad – Tetradecad) system were assigned. The resulting list of lines is significantly more accurate than previous empirical compilations. Positions of 8605 cold band transitions for (GS – Octad) system were fitted with an RMS standard deviation of 0.0014 cm-1. The sum of observed intensities between 4300 and 4600 cm-1 fell within 8% of the predicted value from ab initio variational calculations reported in the TheoReTS database (http://theorets.univ-reims.fr ; http://theorets.tsu.ru).
DOI: 10.48577/jpl.s8oylp
title: The first high-redshift changing-look quasars

description: We report on three redshift z &gt; 2 quasars with dramatic changes in their C iv emission lines, the first sample of changing-look quasars (CLQs) at high redshift. This is also the first time the changing-look behaviour has been seen in a high-ionisation emission line. SDSS J1205+3422, J1638+2827, and J2228+2201 show interesting behaviour in their observed optical light curves, and subsequent spectroscopy shows significant changes in the C iv broad emission line, with both line collapse and emergence being displayed on rest-frame timescales of ∼240-1640 days. These are rapid changes, especially when considering virial black hole mass estimates of MBH &gt; 109 M⊙ for all three quasars. Continuum and emission line measurements from the three quasars show changes in the continuum-equivalent width plane with the CLQs seen to be on the edge of the full population distribution, and showing indications of an intrinsic Baldwin effect. We put these observations in context with recent state-change models, and note that even in their observed low-state, the C iv CLQs are generally above ∼5% in Eddington luminosity.
DOI: 10.25549/independent-c69-46211
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.diadty
title: Starshade Formation Flying II: Formation Control

description: Several Starshade concepts for imaging exo-Earths would operate at the 2nd Earth-Sun Lagrange point (L2) and consist of a Starshade flying in formation tens to hundreds of thousands of kilometers from a telescope. The Starshade would need to maintain meter-level lateral alignment with the line of sight from telescope to target star. A companion paper describes an optical sensing scheme using a pupil imaging camera in the telescope that can sense the relative lateral position to a few centimeters. In this article, a full flight-traceable formation flying framework that leverages this sensor is presented. In particular, a two-dimensional “disk deadbanding” algorithm is introduced for lateral control. The framework also maximizes the drift time between thruster burns to reduce interruption to science observations. The main sources of uncertainty affecting the control performance are compared and it is found that spacecraft mass uncertainty is a driving factor. The formation flying environment is also analyzed to identify conditions that lead to worst-case differential gravity and solar radiation pressure (SRP) disturbances. Finally, for a representative observation scenario with the Wide Field InfraRed Space Telescope (WFIRST), this control system is tested through Monte Carlo simulations. The results show robust meter-level control with essentially optimal drift time between thruster burns.
DOI: 10.15468/dl.ttxqwv
title: Occurrence Download

description: A dataset containing 53 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-106.60081 -4.84311,-106.60081 16.47037,-64.01781 16.47037,-64.01781 -4.84311,-106.60081 -4.84311))",
 "HasCoordinate is true",
 "TaxonKey is Tremarctos ornatus (F.G.Cuvier, 1825)",
 "HasGeospatialIssue is false"
 ]
}

 The dataset includes 53 records from 22 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001443-171124123535762/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.jof8uv
title: The carbon monoxide-rich interstellar comet 2I/Borisov

description: Interstellar comets offer direct samples of volatiles from distant protoplanetary disks. 2I/Borisov is the first notably active interstellar comet discovered in our solar system1. Comets are condensed samples of the gas, ice, and dust that were in a star’s protoplanetary disk during the formation of its planets and inform our understanding on how chemical compositions and abundances vary with distance from the central star. Their orbital migration moves volatiles2, organic material, and prebiotic chemicals in their host system3. In our solar system, hundreds of comets have been observed remotely, and a few have been studied up close by space missions4. However, knowledge of extrasolar comets has been limited to what could be gleaned from distant, unresolved observations of cometary regions around other stars, with only one detection of carbon monoxide5. Here we report that the coma of 2I/Borisov contains significantly more CO than H2O gas, with abundances of at least 173%, more than three times higher than previously measured for any comet in the inner (&lt;2.5 au) solar system4. Our ultraviolet observations of 2I/Borisov provide the first glimpse into the ice content and chemical composition of the protoplanetary disk of another star that is significantly different from our own.
DOI: 10.15468/dl.qc2wvm
title: Occurrence Download

description: A dataset containing 15 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium ponapense Schltr."
 ]
}

 The dataset includes 15 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170019-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.l1uyqj
title: Spaceborne Mid- and Far-infrared Observations Improving Nighttime Ice Cloud Property Retrievals

description: Two upcoming missions will provide systematic spaceborne observations of upwelling far-infrared spectra. The accuracy of ice cloud property retrievals using combined spaceborne mid-to-far-infrared (MIR–FIR) measurements is examined, focusing on retrieval biases and uncertainties. Retrieval simulations demonstrate that combined MIR–FIR measurements enhance sensitivity to ice cloud properties for providing an alternative means for retrieving this information at night. However, the temperature dependence of the ice refractive index and relevant ice particle shape models need to be incorporated into the retrieval procedure to avoid systematic retrieval biases in cloud optical thickness and effective particle radius. Furthermore, prior information of subpixel cloud fractions is essential to mitigate substantial systematic retrieval biases due to inconsistent subpixel cloud fractions.
DOI: 10.25549/independent-c69-46256
title: Reports (1-2 of 3) - A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988-11-18

description: Report: A review of administrative processes of the Tampa Police Department by the Police Foundation, 1988 November 18.
DOI: 10.48577/jpl.5trs6l
title: Airfall on Comet 67P/Churyumov-Gerasimenko

description: We here study the transfer process of material from one hemisphere to the other (de-position of airfall material) on an active comet nucleus, speciffcally 67P/Churyumov-Gerasimenko. Our goals are to: 1) quantify the thickness of the airfall debris layersand how it depends on the location of the target area, 2) determine the amount ofH2O and CO2 ice that are lost from icy dust assemblages of different sizes duringtransfer through the coma, and 3) estimate the relative amount of vapor loss in airfallmaterial after deposition in order to understand what locations are expected to bemore active than others on the following perihelion approach. We use various numerical simulations, that include orbit dynamics, thermophysics of the nucleus and of individual coma aggregates, coma gas kinetics and hydrodynamics, as well as dust dynamics due to gas drag, to address these questions. We find that the thickness of accumulated airfall material varies substantially with location, and typically is of the order 0.1-1 m. The airfall material preserves substantial amounts of water ice even in relatively small (cm-sized) coma aggregates after a rather long (12 h) residence in the coma. However, CO2 is lost within a couple of hours even in relatively large (dm-sized) aggregates, and is not expected to be an important component in airfall deposits. We introduce reachability and survivability indices to measure the relative capacity of different regions to simultaneously collect airfall and to preserve its water ice until the next perihelion passage, thereby grading their potential of contributing to comet activity during the next perihelion passage.
DOI: 10.48577/jpl.bzbkge
title: Quantum Teleportation for Control of Dynamical Systems and Autonomy

description: The application of Quantum Teleportation for control of classical dynamic systems and autonomy is proposed in this paper. Quantum teleportation is an intrinsically quantum phenomenon, and was first introduced by teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels in 1993. In this paper, we consider the possibility of applying this technique to autonomous mobile classical platforms for control and autonomy purposes for the first time in this research. First, a review of how Quantum Entanglement and Quantum Cryptography can be integrated into macroscopic mechanical systems for controls and autonomy applications is presented, as well as how quantum teleportation concepts may be applied to the classical domain. In quantum teleportation, an entangled pair of photons which are correlated in their polarizations are generated and sent to two autonomous platforms, which we call Alice Robot and Bob Robot. Alice is provided a quantum system, i.e. a photon, prepared in an unknown state, in addition to receiving an entangled photon. Alice measures the state of her entangled photon and her unknown state jointly and sends the information through a classical channel to Bob. Although Alice’s original unknown state is collapsed in the process of measuring the state of the entangled photon (due to the quantum non-cloning phenomenon), Bob can construct an accurate replica of Alice’s state by applying a unitary operator. This paper, and the previous investigations of the applications of quantum capabilities in control of dynamical systems, are aimed to promote the adoption of quantum capabilities and its advantages to the classical domain particularly for autonomy and control of autonomous classical systems.
DOI: 10.15468/dl.npfyfo
title: Occurrence Download

description: A dataset containing 198 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Chlopsis bicolor Rafinesque, 1810"
 ]
}

 The dataset includes 198 records from 16 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0005707-170714134226665/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.9kmkhf
title: On Mechanical Motion Damping of a Magnetically Trapped Diamagnetic Particle

description: We discuss eddy-current-induced limitations of the attenuation of mechanical motion of a diamagnetic particle trapped by an inhomogeneous magnetic eld in the Earth gravity potential. We show that the mechanical frequency of the particle oscillation is independent on the particle properties and is proportional to the free fall acceleration constant, similarly to the classical mechanical pendulum. The frequency can be used to measure the gravity eld. The eddy-current induced attenuation constant does not depend on the mass of the particle and reduces with the particle volume. The quality factor of the mechanical motion can be as high as 10^9 and is comparable withthe attenuation due to interaction of the particle with incompletely evacuated air.
DOI: 10.15468/dl.m4gy33
title: Occurrence Download

description: A dataset containing 23 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium praecinctum Rchb.f."
 ]
}

 The dataset includes 23 records from 12 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170023-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.25549/independent-c69-46470
title: City of quartz. "The hammer and the rock", 1990

description: "The hammer and the rock", chapter 5 in Mike Davis. City of quartz. New York, New York: Verso, 1990: pp. 267-322. Includes dustjacket.