cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.25549/independent-c69-44768
title: Attorney notes, 1991 Apr.-June

description: Collection of handwritten attorney notes, some with attached business cards (Sol Bernstein, Thomas W. Lorenzen, Charles M. Naumer, Philip A. Henning Jr.), with Los Angeles Police Department complaint database reports, phone message, 1991 April-June. PART OF A SERIES: The series relates to the work product of Sibley & Austin, whose staff contributed to the Commission's probe of excessive force allegations brought against the LAPD. Included in the series are memoranda, witness testimonies, interview summaries, copies of officers' background files, after-action summaries and reports, and notes taken by the firm. Materials relate to four major areas of study undertaken by the firm: the Justice for Janitors labor demonstration of 1990, the jail ward of County/USC Medical Center, Los Angeles city jails, and a review of the LAPD's Background Investigation Unit.
DOI: 10.48577/jpl.iegqgb
title: Climate lags and genetics determine phenology in quaking aspen (Populus tremuloides )

description: No abstract available.
DOI: 10.48577/jpl.qjbiiq
title: Modeling the Effects of Oscillator Phase Noise and Synchronization on Multistatic SAR Tomography

description: Recent results have highlighted the potential ability of bi- and multistatic synthetic aperture radar (SAR) tomographers to measure vegetation structure and surface topography. However, the quality of SAR tomographic measurements with multiple platforms is impacted by the phase instability in each platform’s oscillator. The phase noise, if uncompensated, may lead to degradation in the SAR data products such as increased sidelobe levels, reduced peak amplitude of the impulse response, and a low frequency phase modulation, among others. In this work, we model and examine the effects of oscillator phase noise on tomographic SAR signals for spaceborne missions flying in formation. A synchronization process is also adopted to help mitigate oscillator phase errors by measuring and predicting relative phase offsets at prescribed temporal intervals. A simulation tool was developed to examine the point target response as seen by realistic satellite constellations in low Earth orbit using different quality oscillators, radar configurations, and synchronization configurations. A first analysis of a multi-platform tomographic SAR mission suggests that a system without a dedicated physical link with minimal effects on the point target response may be achievable using current oscillators. Our analysis also shows that phase noise has differing effects on multistatic radar modes. Tomograms formed with a system operating in SIMO mode are the most affected by oscillator phase noise error, followed by MIMO, with negligible effects on the SAR-SISO mode. These trade studies and the simulation tool can be used to help inform the design of future multistatic radar missions.
DOI: 10.15468/dl.hq2kuh
title: Occurrence Download

description: A dataset containing 24 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium conspicuum Bakh.f."
 ]
}

 The dataset includes 24 records from 5 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170073-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.t8qkuo
title: ACHORD: Communication-Aware Multi-Robot Coordination with Intermittent Connectivity

description: Communication is an important capability for multi-robot exploration because (1) inter-robot communication (comms) improves coverage efficiency and (2) robot-to-base comms improves situational awareness. Exploring comms-restricted (e.g., subterranean) environments requires a multi-robot system to tolerate and anticipate intermittent connectivity, and to carefully consider comms requirements, otherwise mission-critical data may be lost. In this paper, we describe and analyze ACHORD (Autonomous \& Collaborative High-Bandwidth Operations with Radio Droppables), a multi-layer networking solution which tightly co-designs the network architecture and high-level decision-making for improved comms. ACHORD provides bandwidth prioritization and timely and reliable data transfer despite intermittent connectivity. Furthermore, it exposes low-layer networking metrics to the application layer to enable robots to autonomously monitor, map, and extend the network via droppable radios, as well as restore connectivity to improve collaborative exploration. We evaluate our solution with respect to the comms performance in several challenging underground environments including the DARPA SubT Finals competition environment. Our findings support the use of robotic message ferrying to complement static relay nodes, data stratification, and flow control to improve bandwidth-usage.
DOI: 10.25549/independent-c69-44775
title: Attorney notes, 1991 Apr.-June

description: Collection of handwritten attorney notes, some with attached business cards (Sol Bernstein, Thomas W. Lorenzen, Charles M. Naumer, Philip A. Henning Jr.), with Los Angeles Police Department complaint database reports, phone message, 1991 April-June. PART OF A SERIES: The series relates to the work product of Sibley & Austin, whose staff contributed to the Commission's probe of excessive force allegations brought against the LAPD. Included in the series are memoranda, witness testimonies, interview summaries, copies of officers' background files, after-action summaries and reports, and notes taken by the firm. Materials relate to four major areas of study undertaken by the firm: the Justice for Janitors labor demonstration of 1990, the jail ward of County/USC Medical Center, Los Angeles city jails, and a review of the LAPD's Background Investigation Unit.
DOI: 10.48577/jpl.endjey
title: Radar Attenuation in Enceladus’ Ice Shell: Obstacles and Opportunities for Constraining Shell Thickness, Chemistry, and Thermal Structure

description: Enceladus is a dynamic icy moon of Saturn and a leading target for future planetary missions focused on the search for life beyond Earth. For such missions, instruments that can provide geophysical and geochemical context for ice shell and ocean processes are critical to evaluate whether conditions are suitable for life and biosignature detection. Radar sounding is a powerful geophysical technique to probe the thermophysical and chemical properties of icy moons, like Enceladus, and to investigate the subsurface context for the exchange of material and energy between their subsurface oceans, ice shells, and plumes. To inform the scientific potential and instrument performance demands of such a radar sounding investigation, we adapt and extend previous radar attenuation analysis done for Europa to the configuration and conditions of Enceladus. We also discuss how attenuation (both as an obstacle for the detection of ice shell reflectors and as a signal itself) can help constrain the thermal, physical, and chemical configuration of Enceladus’ ice shell and reveal the processes governing the moon's ocean/shell/plume system.
DOI: 10.15468/dl.q2i0ej
title: Occurrence Download

description: A dataset containing 32518 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Spain",
 {
 "or" : [
 "TaxonKey is Moehringia fontqueri Pau",
 "TaxonKey is Moehringia intricata Willk.",
 "TaxonKey is Silene gazulensis A.Galán, J.E.Cortés, Vicente Orell. & R.Morales",
 "TaxonKey is Euonymus latifolius (Scop.) A.Gray",
 "TaxonKey is Echinospartum algibicum Talavera & Aparicio",
 "TaxonKey is Rupicapnos africana Pugsley",
 "TaxonKey is Sarcocapnos speciosa Boiss.",
 "TaxonKey is Erodium astragaloides Boiss. & Reut.",
 "TaxonKey is Erodium rupicola Boiss.",
 "TaxonKey is Geranium cazorlense Heywood",
 "TaxonKey is Rosmarinus tomentosus Hub.-Mor. & Maire",
 "TaxonKey is Thymus albicans Hoffmanns. & Link",
 "TaxonKey is Papaver lapeyrousianum Gutermann",
 "TaxonKey is Limonium estevei Fern.Casas",
 "TaxonKey is Halocnemum strobilaceum (Pall.) M.Bieb.",
 "TaxonKey is Aquilegia pyrenaica subsp. cazorlensis (Heywood) Galiano & Rivas Mart.",
 "TaxonKey is Alchemilla fontqueri Rothm.",
 "TaxonKey is Haplophyllum bastetanum F.B.Navarro, Suár.-Sant. & Blanca",
 "TaxonKey is Atropa baetica Willk.",
 "TaxonKey is Isoetes durieui Bory",
 "TaxonKey is Juniperus oxycedrus L.",
 "TaxonKey is Narcissus pachybolbus Durieu",
 "TaxonKey is Sparganium angustifolium Michx.",
 "TaxonKey is Ornithogalum reverchonii Lange",
 "TaxonKey is Scilla odorata Link",
 "TaxonKey is Neottia nidus-avis (L.) Rich.",
 "TaxonKey is Ophrys atlantica Munby",
 "TaxonKey is Ophrys speculum Link",
 "TaxonKey is Avena murphyi Ladiz.",
 "TaxonKey is Micropyropsis tuberosa Romero Zarco & Cabezudo"
 ]
 }
 ]
}

 The dataset includes 32518 records from 90 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001445-150721130643939/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.v88imk
title: High-fidelity reaction kinetic modeling of hot-Jupiter atmospheres incorporating thermal and UV photochemistry enhanced by metastable CO(a3Pi)

description: A detailed modeling of simultaneous UV-photochemical and thermochemical processes in exoplanet atmosphere-like conditions is essential for the analysis and interpretation of a vast amount of current and future spectral data from exoplanets. However, a detailed reaction kinetic model that incorporates both UV photochemistry and thermal chemistry is challenging due to the massive size of the chemical system as well as to the lack of understanding of photochemistry compared to thermal-only chemistry. Here, we utilize an automatic chemical reaction mechanism generator to build a high-fidelity thermochemical reaction kinetic model later then incorporated with UV-photochemistry enhanced by metastable triplet-state carbon monoxide (a\textsuperscript{3}$\Pi$). Our model results show that two different photochemical reactions driven by Lyman-$\alpha$ photons (i.e. \ce{H2} + CO(a\textsuperscript{3}$\Pi$) $\rightarrow$ H + HCO and CO(X\textsuperscript{1}$\Sigma^+$) + CO(a\textsuperscript{3}$\Pi$) $\rightarrow$ C(\textsuperscript{3}P) + \ce{CO2}) can enhance thermal chemistry resulting in significant increases in the formation of \ce{CH4}, \ce{H2O}, and \ce{CO2} in \ce{H2}-dominated systems with trace amounts of CO, which qualitatively matches with the observations from previous experimental studies. Our model also suggests that at temperatures above 2000 K, thermal chemistry becomes the dominant process. Finally, the chemistry simulated up to 2500 K does not produce any larger species such as \ce{C3} species, benzene or larger (i.e. PAHs). This might indicate that the photochemistry of \ce{C2} species such as \ce{C2H2} might play a key role in the formation of organic aerosols observed in the previous experimental study.
DOI: 10.15468/dl.fn8hnq
title: Occurrence Download

description: A dataset containing 2 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Dendrobium pulvinatum Schltr."
 ]
}

 The dataset includes 2 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0170061-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.zguz3g
title: Planning under periodic observations: bounds and bounding-based solutions

description: We study planning problems faced by robots operating in uncertain environments with incomplete knowledge of state and, actions that are noisy and/or imprecise. This paper identifies a new problem sub-class that models settings in which information is revealed only intermittently through some exogenous process that provides state information periodically. Several practical domains fit this model, including the specific scenario that motivates our research: autonomous navigation of a remote rover. With an eye to efficient specialized solution methods, we examine the structure of instances of this sub-class. They lead to Markov Decision Processes with exponentially large action-spaces but for which, as those actions comprise sequences of more atomic elements, one may establish performance bounds by comparing policies under different information assumptions. For instance, policies with actions that have a prefix form entail waiting to obtain information. They give lower bounds. Or instead, one might imagine extra information becoming available so that the robot obtains its state estimate early; these yield upper bounds. Moving beyond the pattern apparent in these basic intuitions, we also describe a way to construct bounds systematically. Bounds are useful because, in conjunction with the insights they confer, they can be employed in bounding-based methods to obtain high- quality solutions efficiently; the empirical results we present demonstrate their effectiveness for the considered problems. The foregoing has also alluded to the distinctive role that time (specifically: the time until information is revealed) plays for these problems. We uncover several interesting subtleties: one may quantify the value of knowing when information arrives, as distinct from the value of information itself. Also, obtaining information earlier isn’t always better, even under exponential discounting.
DOI: 10.25549/independent-c69-44756
title: Attorney notes, 1991 Apr.-June

description: Collection of handwritten attorney notes, some with attached business cards (Sol Bernstein, Thomas W. Lorenzen, Charles M. Naumer, Philip A. Henning Jr.), with Los Angeles Police Department complaint database reports, phone message, 1991 April-June. PART OF A SERIES: The series relates to the work product of Sibley & Austin, whose staff contributed to the Commission's probe of excessive force allegations brought against the LAPD. Included in the series are memoranda, witness testimonies, interview summaries, copies of officers' background files, after-action summaries and reports, and notes taken by the firm. Materials relate to four major areas of study undertaken by the firm: the Justice for Janitors labor demonstration of 1990, the jail ward of County/USC Medical Center, Los Angeles city jails, and a review of the LAPD's Background Investigation Unit.
DOI: 10.48577/jpl.1sijxx
title: Resonant pneumatic tactile sensing for soft grippers

description: Soft robots capable of dexterous manipulation can enable the exploration of extreme environments. Equipping these robots with tactile sensing is a challenge, as sensors must be flexible, stretchable, and robust to environmental conditions. We present a tactile sensor design with a pneumatically driven acoustic resonator, without electronics near from the end-effector. For applications to soft grippers, we measure the resonant frequency of a soft tube undergoing stretching and bending. A small hole along the resonant tube enables contact sensing and pretouch up to 2mm away. We also measure resonant frequency for a rigid uni-axial force sensing probe. Grasping tasks utilize three sensing modalities of a soft gripper; finger pose, fingertip contact, and force in the palm all provide feedback for dexterous manipulation. We discuss and address in future work the effects of atmosphere and air flow rate on resonant frequency as well as limitations in signal processing of this sensor design.
DOI: 10.15468/dl.xxw3h8
title: Occurrence Download

description: A dataset containing 192 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Centrolene lynchi (Duellman, 1980)"
 ]
}

 The dataset includes 192 records from 4 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001445-150831095807960/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.yayfyw
title: Laboratory Simulations of Exoplanet Atmospheres

description: No abstract available.
DOI: 10.48577/jpl.3ale1j
title: ShadowNav: Crater-Based Localization for Nighttime and Permanently Shadowed Region Lunar Navigation

description: There has been an increase in interest in missions that drive significantly longer distances per day than what has currently been performed. For example, Endurance-A pro- poses driving several kilometers a day in order to reach its target traverse of 2,000 km in 4 years. Additionally, some of these proposed missions, including Endurance-A and rovers for permanently shadowed regions (PSRs) of the moon, re- quire autonomous driving and absolute localization in darkness. Endurance-A proposes to drive 1,200 km of its total traverse at night. The lack of natural light available during these missions limits what can be used as visual landmarks and the range at which landmarks can be observed. In order for planetary rovers to traverse long-ranges, onboard absolute localization is critical to the rover’s ability to maintain its planned trajectory and avoid known hazardous regions. Currently, the localization performed onboard rovers is relative to the rover’s frame of reference and is performed through the integration of wheel and visual odometry and inertial measurements. To accomplish absolute localization, a “ground-in-the-loop” (GITL) operation is performed wherein a human operator matches local maps or images from onboard with orbital images and maps. This GITL operation places a limit on the distance that can be driven in a day to a few hundred meters, which is the distance that the rover can maintain acceptable localization error via relative methods. Previous work has shown that using craters as landmarks is a promising approach for performing absolute localization on the moon during the day. In this work we present a method of absolute localization that utilizes craters as landmarks and matches detected crater edges on the surface with known craters in orbital maps. We focus on a localization method based on a perception system which has an external illuminator and a stereo camera. While other methods based on lidar exist, lidar is not currently planned for deployment on the current proposed nighttime and PSR missions. In this paper, we evaluate (1) both monocular and stereo based surface crater edge detection techniques, (2) methods of scoring the crater edge matches for optimal localization, and (3) localization performance on simulated Lunar surface imagery at night. We demonstrate that this technique shows promise for maintaining absolute localization error of less than 10m required for most planetary rover missions.
DOI: 10.25549/independent-c69-44766
title: Attorney notes, 1991 Apr.-June

description: Collection of handwritten attorney notes, some with attached business cards (Sol Bernstein, Thomas W. Lorenzen, Charles M. Naumer, Philip A. Henning Jr.), with Los Angeles Police Department complaint database reports, phone message, 1991 April-June. PART OF A SERIES: The series relates to the work product of Sibley & Austin, whose staff contributed to the Commission's probe of excessive force allegations brought against the LAPD. Included in the series are memoranda, witness testimonies, interview summaries, copies of officers' background files, after-action summaries and reports, and notes taken by the firm. Materials relate to four major areas of study undertaken by the firm: the Justice for Janitors labor demonstration of 1990, the jail ward of County/USC Medical Center, Los Angeles city jails, and a review of the LAPD's Background Investigation Unit.
DOI: 10.15468/dl.5pttk2
title: Occurrence Download

description: A dataset containing 6999 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((125.23388 2.62816,119.70635 1.40573,117.60696 -3.3777,118.74967 -6.14147,124.27719 -6.06174,124.43664 -3.5903,123.00161 -2.07555,124.80868 -0.85312,125.95139 1.326,125.23388 2.62816))",
 "TaxonKey is Polypodiopsida"
 ]
}

 The dataset includes 6999 records from 30 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0052552-231002084531237/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.vvy57y
title: Thermal Design of the Mars Ascent Vehicle for the Mars Sample Return Mission

description: The Mars Ascent Vehicle (MAV) is the rocket designed to bring samples from the surface of Mars back to Earth for scientific investigation as part of the Mars Sample Return (MSR) mission. This endeavor would be the first attempt in human history to return a spacecraft with collected material from another plane. Although samples from smaller bodies and interstellar particles have been successfully returned to Earth [1], return missions from planets present additional challenges to overcome, including the larger gravitational field to access. In this manuscript, we present the baseline architecture and design of the MAV thermal control system necessary to maintain its hardware, including the solid rocket motors, its control and guidance system, and associated avionics within temperature requirements during all flight phases starting from launch until landing and mission completion after successful transfer of the samples to the Earth Return Orbiter. Design challenges are imposed by the cold-biased, large temperature oscillation environment on Mars (in excess of a 100 °C swing during a diurnal cycle), and the limited thermal power generated by the solar panels. The overall thermal design of the MAV includes both passive and active control to survive the harsh conditions on Mars. CO2 gas gap insulation and conductive and radiative heat loss management are the hallmarks of the MAV thermal control system described in this paper.
DOI: 10.48577/jpl.qnobuw
title: Towards Robust, Resilient Ocean World Science Sampling Systems

description: NASA’s search for life and habitable regions in our solar system will likely lead to future landed missions on Europa and Enceladus, whose ocean worlds may support life. However, these destinations pose significant operational challenges – distance makes for a long communications lag, the lifetime of landed assets will be limited by radiation damage and hostile conditions, and have finite power. These conditions demand a high degree of autonomy in order to carry out the excavation, collection, and transfer of samples to in-situ scientific instruments, and to communicate results back to Earth. Our Robust, Explainable Autonomy for Scientific Icy Moon Operations (REASIMO) effort aims to improve the science yield and robustness of these kinds of missions by increasing the level of flight-qualifiable autonomy that can be applied to such operations. This is to be achieved by recognizing and , where possible, handling anomalies in situ, whether caused by faults, degradations, failures, or other unexpected conditions.
DOI: 10.15468/dl.npko1e
title: Occurrence Download

description: A dataset containing 204010 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Peromyscus maniculatus (Wagner, 1845)"
 ]
}

 The dataset includes 204010 records from 103 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0001445-150912100344238/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.