cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5517/ccdc.csd.cc2h234v
title: CCDC 2295926: Experimental Crystal Structure Determination

description: Related Article: Yaqi Deng, Zongjing Hu, Jian Xue, Jiabin Yin, Tong Zhu, Shunying Liu|2024|Org.Lett.|26|933|doi:10.1021/acs.orglett.3c04291
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2h7vh3
title: CCDC 2301455: Experimental Crystal Structure Determination

description: Related Article: Kaiyip Chan, Fei Ying, Dongyu He, Li Yang, Yanxia Zhao, Jing Xie, Ji-Hu Su, Biao Wu, Xiao-Juan Yang|2024|J.Am.Chem.Soc.|146|2333|doi:10.1021/jacs.3c11893
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2h7vj4
title: CCDC 2301456: Experimental Crystal Structure Determination

description: Related Article: Kaiyip Chan, Fei Ying, Dongyu He, Li Yang, Yanxia Zhao, Jing Xie, Ji-Hu Su, Biao Wu, Xiao-Juan Yang|2024|J.Am.Chem.Soc.|146|2333|doi:10.1021/jacs.3c11893
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2h7vk5
title: CCDC 2301457: Experimental Crystal Structure Determination

description: Related Article: Kaiyip Chan, Fei Ying, Dongyu He, Li Yang, Yanxia Zhao, Jing Xie, Ji-Hu Su, Biao Wu, Xiao-Juan Yang|2024|J.Am.Chem.Soc.|146|2333|doi:10.1021/jacs.3c11893
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2hbsd1
title: CCDC 2304273: Experimental Crystal Structure Determination

description: Related Article: Shannon E. Cooney, M. Rebecca A. Walls, Eric Schreiber, William W. Brennessel, Ellen M. Matson|2024|J.Am.Chem.Soc.|146|2364|doi:10.1021/jacs.3c14054
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.5517/ccdc.csd.cc2hm51c
title: CCDC 2312322: Experimental Crystal Structure Determination

description: Related Article: Masahiro Kaneko, Atsuhiro Yamashita, Yoko Yasuno, Kosei Yamauchi, Ken Sakai, Tohru Oishi|2024|Org.Lett.|26|855|doi:10.1021/acs.orglett.3c04013
description: An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
DOI: 10.48577/jpl.2dkqa9
title: A Machine Learning Approach for Hydrogen Maser Frequency Stability Evaluation

description: In this work, we present a novel method of using auxiliary telemetry data and machine learning to predict the frequency stability regime of an active hydrogen maser. Assessing variations in the frequency stability of a precision frequency standard traditionally requires the simultaneous operation of multiple frequency standards. In the Jet Propulsion Laboratory (JPL) Frequency Standards Test Laboratory (FSTL), precision phase monitoring equipment is used to continuously measure the frequency stability of an assortment of active hydrogen masers. Glitches and performance degradation in one maser can be isolated by measuring that maser against the others and performing three-cornered-hat comparisons. The FSTL also records a variety of maser telemetry signals associated with signal strength, vacuum system integrity, and environmental regulation. Historically, these telemetry values are recorded to qualitatively assess the health of each maser and to advise preventative maintenance. This work explores the potential for repurposing this telemetry data for predicting the approximate Allan deviation of a maser in situations where a three-cornered-hat comparison is not possible. The machine learning algorithm extracts scalar features from the maser telemetry signals using principal component analysis, and these features are used to train a random forest binary classifier that predicts whether a maser is performing within a preset stability threshold. The trained model was able to predict the stability regime of masers in the FSTL with a classification accuracy of greater than 80% and a Matthew Correlation Coefficient (MCC) of 0.45 for Taus between 10^4 and 10^5 s. Furthermore, occlusion sensitivity analyses were performed on the trained model to determine which telemetry signals were most influential in determining the stability class of the maser. The proposed methodology potentially subverts the need for the three-cornered-hat measurement approach, allowing for an approximate assessment of the maser’s stability in real time and in an isolated environment.
DOI: 10.48577/jpl.zy4q9a
title: Ku-band Metal-only Flate Metasurface Radar Antenna for Small Platforms

description: Metal-only metasurface antennas for small platforms are under development at the NASA’s Jet Propulsion Laboratory to provide high gain, low-profile, low-cost and harsh environment survivable solutions for small airborne and spaceborne platforms. A metal-only Ku-band co-located metasurface antenna pair has been developed for a UAV snow radar with approximately 30 dBi gain, -14 dB reflection coefficient and 60 dB port-to-port isolation over 15-16 GHz band. The antenna has been manufactured and tested, and is currently being used for the field measurements.
DOI: 10.48577/jpl.aaptd8
title: Enhancing the optical communication telescope laboratory (OCTL) to support quantum communications between Earth and space

description: No abstract available.
DOI: 10.5281/zenodo.10614828
title: Japan's FDI drivers in a time of financial uncertainty. New evidence based on Bayesian Model Averaging
DOI: 10.5281/zenodo.10614829
title: Japan's FDI drivers in a time of financial uncertainty. New evidence based on Bayesian Model Averaging
DOI: 10.48577/jpl.pxx5ll
title: Effect of Aging on BGA Solder Strengths Thermal Cycles for Low Temp. Hybrid Assembly

description: This paper presents two key aspects of reliability of ball grid array (BGA) technologies: one aspect for high-reliability and the other one for commercial applications. For high reliability, it presents the effect of isothermal aging at BGA level to address burn-in requirement for die screening per Mil standard specification. Pull and shear behavior of BGAs with tin-lead and SAC305 solder balls were characterized for a number of components before and after two burn-in conditions (125℃ and 150℃ for 240 hr). The burn-in and fresh BGAs were assembled onto PCBs and then subject to thermal cycling (TC) between –40℃ and 125℃ to determine cycles-to-failures (CTFs) for comparison. Pull and shear strength test results of tin-lead and SAC305 solder balls were presented for CABGA208, CTBGA228, and CVBGA360 with 0.8, 0.8, and 0.5 mm pitches. CTFs in Weibull plots were presented for the SnPb CABGA208 for fresh and burn-in conditions. The commercial aspect covered low temperature solder ball and solder paste for assembling of BGAs and other components. We evaluated two types of low temperature BiSn alloys with Cu/Ni or Ag additives and melting temperatures between 139˚C solidus and 174˚C liquidus. The mixed hybrid configuration utilized SAC305 BGAs using the SnBiAg alloy solder paste. The low temperature assemblies were subjected to two TCs (–40℃/105℃ and 0℃/105℃). CTF results are present for CABGA208 with failure analysis by X-sectional evaluation.
DOI: 10.48577/jpl.64opwu
title: Dynamics of Viscoelastic Tethers for Planetary Aerobots using a Fractional Derivative Model

description: Aerobots are expected to play a key role in future missions to explore the atmospheres of Venus and other planetary bodies. Proposed missions to Venus involve lowering instruments on tethers towards the inhospitable surface from balloons at altitudes on the order of 50 km. Accurately capturing the viscoelastic behavior of the tethers in system design models is essential for managing response and loads during dynamic events (deployment, gusts, flight control) and following long-term aging in extreme environments. The behavior of materials likely to be used in tethers, such as Kevlar, is well-described by a fractional-derivative viscoelastic model. One of the shortcomings of such models is the challenge of numerical time integration of the system equations of motion. In this work, fractional derivative behavior is approximated using a multi-ADF (augmenting displacement fields) model. The multi-ADF model augments the instantaneous displacement field with multiple discrete internal displacement fields that individually evolve following first-order relaxation processes. Notably, while the fractional derivative model is non-local in time, requiring the entire history for evaluation, the first-order version is local, essentially capturing the history in the present values of internal state variables. A multi-ADF finite element model of a tether with an instrument gondola is developed, and a Newmark time integration scheme is used to obtain the dynamic response of the system during a drop test. The multi-ADF model is shown to be very accurate for creep, dynamics, and gondola-drop simulations, and runs in a fraction of the time required for a direct fractional-derivative model.
DOI: 10.48577/jpl.f2fofb
title: Software Error Software Error Classification and Dependency Assessment for NASA Missions

description: Software anomalies are typically captured in databases, classified, and traced until they are resolved. These databases then remain part of the history for the space missions to refer to as necessary. The classifications used for the software anomalies are not always orthogonal and it is not trivial for developers and software assurance personnel to make the mapping between the anomaly in question and its related classification. Perhaps more significantly, the classification scheme and the attributes included in the standardized forms does not clarify whether or not the error in question, and its corresponding fix, affect other areas of the system. Our research indicates that there are a few keywords that can help the users of these systems identify each of these factors with a reasonable level of confidence. Of course, since the information is captured using natural language, and is highly specialized, these keywords may be different from one mission to another and from one center to another. However, tools that enable the team to develop their own keywords or modify keywords that are seeded into the system could be beneficial in helping to correctly classify the anomalies and better understand the dependencies between them. The first step, is, of course, a clear, concise and descriptive classification scheme. In this paper, we explain our efforts towards developing a standardized classification scheme, based on our examination of these schemes across several NASA centers, as well as the literature, and we also define the concept for a module for user assisted analysis based on keywords that we have extracted from studying a subset of the problem failure reports for the Mars Perseverance Rover mission.
DOI: 10.48577/jpl.a07nfr
title: Locking range in a sideband-injection-controlled frequency comb

description: No abstract available.
DOI: 10.48577/jpl.qw3zbo
title: Proton Radiation Effect on Barrier Infrared Detector Focal Plane Arrays

description: This work reports effect of proton radiation on barrier infrared detector with cutoff wavelength of 12.2 μm. The results indicate that proton radiation causes slow increase in dark current of the barrier infrared detector. The radiation effect on quantum efficiency of detector is not conclusive. However, the increase in dark current and decrease in quantum efficiency is slow and within acceptable level for an earth orbit space mission
DOI: 10.48577/jpl.nmk34p
title: Build Toward a Fossil Fuel-Free Future: Next Generation Energy Storage Materials Design Guided by Advanced Multi-Scale Multi-Dimensional Characterization

description: No abstract available.
DOI: 10.48577/jpl.3ci3da
title: The Joint Test Campaign for Verification and Validation of Shared Operational Processes on NISAR

description: The NASA-ISRO Synthetic Aperture Radar (NISAR) Spacecraft – planned to be launched in 2024 - is one of the first major partnerships between the US and Indian space agencies. The NISAR earth satellite will use L-band and S-band radar imaging to make global observations of land and ice-covered surfaces for wide-ranging applications and studies of natural hazards, biomass, sea level rise and agriculture. NASA’s Mission System V&V (Verification and Validation) team on NISAR is responsible for ensuring the ground system and team of operators are ready for flight operations in order to achieve joint NASA-ISRO mission objectives. This includes testing operational software, procedures, teams and interfaces to certify the system prior to launch. For typical NASA/JPL missions, a series of system-level and process tests (known as thread tests) that increase in complexity over time are run, culminating in Operational Readiness Tests (ORTs) which exercise critical activities and procedures in a flight-like environment. For NISAR, a new set of tests, known as Joint Thread Tests (JTTs), were added to the test campaign prior to the scheduled ORTs in order to provide both NASA and ISRO teams hands-on training opportunities in interacting with each other on joint processes. The tests demonstrated key processes such as navigational maneuver development and execution, command product planning and execution, and the flow of data between the two agencies. The Joint Thread Test campaign was very successful – it revealed process and interface issues early in order to allow the teams to develop resolution plans prior to the ORTs, catalysed the setup of network infrastructure, and helped develop a good working relationship between the NASA and ISRO operations teams. This paper will provide a detailed look at the need and motivation for the NASA-ISRO Joint Thread Test campaign, and elaborate on their differences from other testing conducted on the project, including system integration and operational readiness tests. It will summarize joint thread test development, execution, results and lessons learned. It will also cover the challenges encountered during testing with a team distributed across opposite sides of the planet, and complications added by their execution during a pandemic. Finally, it will include plans for the Operational Readiness Tests that will be executed in the months leading up to launch
DOI: 10.48577/jpl.yzrzio
title: A Demand Access System for Deep Space Operations

description: No abstract available.
DOI: 10.48577/jpl.wv9lrt
title: An ICESat-2 Based Assessment of Coastal Sea-Level Trends and Variability

description: No abstract available.
DOI: 10.48577/jpl.aouzv2
title: Stochastic Trajectory Optimization with Chance Constraints

description: No abstract available.
DOI: 10.48577/jpl.8wmywb
title: Antenna Beam-Sharing: Progress Toward Simultaneous Multiple Uplinks Per Antenna

description: No abstract available.
DOI: 10.48577/jpl.8bpzba
title: Starshades: A path to imaging exoplanets

description: No abstract available.
DOI: 10.48577/jpl.vlmfw6
title: Mapping resources for coastal California habitats

description: No abstract available.
DOI: 10.48577/jpl.jkxybu
title: Climate Science at the Extremes

description: No abstract available.
DOI: 10.48577/jpl.wrd5wt
title: Deep Space Optical Communications Technology Demonstration Pre-Launch Validation and Performance Tests with the Laser Test Evaluation Station (LTES)

description: No abstract available.
DOI: 10.48577/jpl.yfxqwy
title: openCAESAR: Enabling Rigor and Agility in MBSE Practice

description: No abstract available.
DOI: 10.48577/jpl.kcmacx
title: Potential applications of SWOT observations to studying the coastal impact of sea level rise

description: No abstract available.
DOI: 10.48577/jpl.l1b7pt
title: Remote Sensing of Vertical Profiles of Clouds and In-cloud Humidity Using a Combined Platform of Radar and Sub-Millimeter Microwave Radiometers

description: No abstract available.
DOI: 10.48577/jpl.dxyzv3
title: Europa Clipper Mission: Assessing Habitability of Europa, Jupiter’s Icy Moon

description: No abstract available.
DOI: 10.48577/jpl.kbbdof
title: Venus Tectonics, an Overview

description: No abstract available.
DOI: 10.48577/jpl.ixy17n
title: Ocean dynamic persistence provides substantial predictability for El Niño-Southern Oscillation (ENSO)

description: No abstract available.
DOI: 10.48577/jpl.3fkv4g
title: OCO-2/3 Calibration Report

description: No abstract available.
DOI: 10.48577/jpl.0m1aex
title: EMIT Town Hall

description: No abstract available.
DOI: 10.48577/jpl.l2llly
title: Optical Ranging for Space-to-Ground Links

description: No abstract available.
DOI: 10.48577/jpl.jeo1mz
title: Planetary Defense Architectures for 2030 and Beyond

description: No abstract available.
DOI: 10.48577/jpl.cxdy6n
title: Europa Clipper

description: No abstract available.
DOI: 10.48577/jpl.uqeccx
title: Large-area SNSPD array for RF/Optical Hybrid 7-segment pathfinder receiver

description: In this work we describe the development, characterization, and integration of a 16-channel, 400-µm diameter active area, differentially read-out NbTiN superconducting nanowire single-photon detector (SNSPD) array and the supporting electronics used in an RF/Optical hybrid telescope for deep-space laser communications. This is the first field-demonstration of a multi-channel, differential read-out SNSPD array. With the number and complexity of future space exploration missions expected to increase, NASA is investigating ways to augment the information capacity of the Deep Space Network (DSN) global array of RF receivers used to track and communicate with these spacecrafts. Optical communication offers a path toward increasing the overall bandwidth of the DSN while allowing for higher data throughput for the same size weight and power (SWAP) transmitter on the spacecraft. NASA’s RF/Optical Hybrid (RFO) program proposes using a segmented, 8-10-meter equivalent aperture primary mirror mounted on existing 34-meter diameter beam waveguide (BWG) RF antennas to couple light into photon counting detectors for pulse position modulation (PPM) and on-off keying (OOK) data formats. JPL has deployed a pathfinder hybrid telescope on a DSN BWG antenna in Goldstone, California. The pathfinder couples light from a 1.2-meter effective diameter, 7-hexagonal-segment mirror assembly to a 400-µm core graded-index multimode fiber. This fiber is then routed to a cryostat and coupled to an SNSPD array through free-space optics. Coupling from a large diameter fiber to an SNSPD array while maintaining a small number of readout channels from the cryostat presents some unique challenges for the SNSPD array and receiver design.
DOI: 10.48577/jpl.gcb5el
title: Optical links with eletronicaly steerable apertures

description: No abstract available.
DOI: 10.5281/zenodo.10614860
title: New evidence on Trade and FDI: how large is the Euro effect?
DOI: 10.5281/zenodo.10614861
title: New evidence on Trade and FDI: how large is the Euro effect?
DOI: 10.6084/m9.figshare.25139960
title: Supplementary Tables - Tomono et al.xlsx

description: Variations of blood concentration levels of reactive carbonyls among three case-control studies of breast and colorectal cancer: Interactions with proteins and nucleic acids of lipid aldehydes, which contribute to oxidative stress signals, are associated with cancer development. The aim of the present study was to identify novel biomarkers for the detection of a high-risk group and/or early disease diagnosis, and to elucidate the roles of lipophilic reactive carbonyls (RCs) on the development of breast and colorectal cancers. In the present study, a comprehensive method was applied for analysis of RCs in plasma/serum samples. Higher concentrations of cis-4-decenal were noted in colorectal and breast cancers, suggesting that they may be candidate biomarkers for high-risk groups and/or early diagnosis.
DOI: 10.6084/m9.figshare.25139960.v1
title: Supplementary Tables - Tomono et al.xlsx

description: Variations of blood concentration levels of reactive carbonyls among three case-control studies of breast and colorectal cancer: Interactions with proteins and nucleic acids of lipid aldehydes, which contribute to oxidative stress signals, are associated with cancer development. The aim of the present study was to identify novel biomarkers for the detection of a high-risk group and/or early disease diagnosis, and to elucidate the roles of lipophilic reactive carbonyls (RCs) on the development of breast and colorectal cancers. In the present study, a comprehensive method was applied for analysis of RCs in plasma/serum samples. Higher concentrations of cis-4-decenal were noted in colorectal and breast cancers, suggesting that they may be candidate biomarkers for high-risk groups and/or early diagnosis.
DOI: 10.5281/zenodo.10613039
title: ST_IGI_data

description: Demo data for the python package ST_IGI (version: 0.2.0).
DOI: 10.5281/zenodo.7937634
title: ST_IGI_data

description: Demo data for the python package ST_IGI (version: 0.2.0).
DOI: 10.5281/zenodo.7937635
title: ST_IGI_data

description: Demo data for the python package <strong>ST_IGI</strong>.
DOI: 10.35078/wythmi/r6fis2
title: Dozinho B.jpg

description: :unav
DOI: 10.35078/12asp4/5abckh
title: Osvaldo Mourão II C.jpg

description: :unav
DOI: 10.35078/h1eozj/3d3jks
title: Carqueja A.jpg

description: :unav
DOI: 10.35078/qsgles/yfvfzi
title: João Barto B.jpg

description: :unav
DOI: 10.35078/cghakq/h0ihm9
title: Fortunato A.jpg

description: :unav
DOI: 10.35078/wythmi/irdtow
title: Ivan B.jpg

description: :unav
DOI: 10.35078/qsgles/6g5asq
title: Jacaré Vila A.jpg

description: :unav
DOI: 10.35078/12asp4/hajeho
title: Geraldo Figueiredo B.jpg

description: :unav
DOI: 10.35078/cghakq/eowsat
title: Ademar Machado da Silva A.jpg

description: :unav
DOI: 10.35078/h1eozj/y6cqqg
title: Áureo Bartolomeu A.jpg

description: :unav
DOI: 10.35078/wythmi/jotx8m
title: César Altino A.jpg

description: :unav
DOI: 10.35078/qsgles/k0u5fr
title: Otávio José da Costa B.jpg

description: :unav
DOI: 10.35078/12asp4/cyupoz
title: Cabeceira Cór. Barbosa B.jpg

description: :unav
DOI: 10.35078/cghakq/qrrwzp
title: Antônio Alves Filho B.jpg

description: :unav
DOI: 10.35078/h1eozj/6o3bb4
title: Três Lagoas II A.jpg

description: :unav
DOI: 10.35078/qsgles/qmddhc
title: José Rodrigues Saraiva B.jpg

description: :unav
DOI: 10.35078/wythmi/c3fmaz
title: Geraldo Branco A.jpg

description: :unav
DOI: 10.35078/12asp4/whl8ws
title: Gilberto Mortimer II B.jpg

description: :unav
DOI: 10.35078/cghakq/ivu1zv
title: Idevair Bragança Oliveira A.jpg

description: :unav
DOI: 10.35078/h1eozj/5zxbhl
title: Ingazeira C.jpg

description: :unav