cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17632/3zkb5djppx.1
title: Assessment of Biodiversity and Environmental Health in IIEE NCC Adapted Mangrove Plants

description: Mangrove ecosystems serve as vital biodiversity hotspots and natural coastal defenses. However, the presence of macroplastic pollution increasingly threatens their ecological integrity in Southeast Asia, particularly in the Philippines. Despite legislative actions such as the Ecological Solid Waste Management Act (RA 9003) and Extended Producer Responsibility (RA 11898), marine litter persists at alarming levels. Local assessments are necessary to quantify environmental degradation and inform regional action plans. This study assessed the environmental health of the IIEE NCC Adapted Mangrove Plants (IIEENCCAMP) using the Clean Coast Index (CCI) and visual categorization of macroplastics based on the Galarpe and Syakti classification. A total of 103 plastic items were collected and categorized to analyze plastic composition and pollution density. The site scored a CCI of 20.6, categorizing it as “Extremely Dirty.” The most prevalent materials were LDPE (29.13%) and PP (14.56%). These plastics were commonly represented by plastic fragments, bags, and disposable utensils. Variability in item types suggests a combination of domestic waste and localized pollution. Calculated variance and standard deviation of observed plastic categories highlighted a high spread of pollution sources. The findings reveal a pressing need for enhanced waste management and localized intervention. High levels of LDPE and PP waste point to the lack of plastic segregation and community-level awareness. The pollution level in IIEENCCAMP exceeds average coastal cleanliness based on previously reported Assessment of Macro Waste Density and Composition on Residential Coastal Zones in Surigao City, Philippines. Future efforts should include multi-season biodiversity surveys, implementation of localized recycling initiatives, and comparative monitoring of coastal CCI in different barangays. Quantitative metrics like SD and variance should be institutionalized to support targeted environmental policies.
DOI: 10.48577/jpl.6w3thk
title: High-Precision Lunar Corner-Cube Retroreflectors: A Wave-Optics Perspective

description: High-precision corner-cube retroreflectors (CCRs) are critical for advanced lunar laser ranging (LLR) because they enable sub-millimeter-scale measurements of the Earth–Moon distance—a level of precision essential for rigorous tests of relativistic gravitation and for advancing our understanding of lunar geophysics. In this work, we develop a comprehensive two-dimensional Fourier-optics model for single CCRs with apertures ranging from 80–110 mm. Our model incorporates realistic thermal–mechanical wavefront errors, detailed diﬀraction eﬀects, and velocity aberration oﬀsets. Our analysis reveals a strong coupling between aperture size and aberration angular oﬀset: while larger CCRs deliver high on-axis flux under near-ideal conditions, their narrow diﬀraction lobes suﬀer significant flux loss at moderate aberration oﬀsets, thereby favoring smaller apertures with broader main lobes. Furthermore, comparisons between solid fused-silica and hollow silicon-carbide (SiC) CCRs show that hollow designs not only achieve competitive or superior photon return—particularly at 1064 nm, where phase errors are relatively reduced—but also oﬀer nearly an order-of-magnitude mass reduction for the same aperture sizes. These results establish a robust quantitative framework for optimizing CCR designs to perform at the sub-millimeter level under realistic lunar conditions and underscore the advantages of presicion hollow SiC CCRs for next-generation LLR operations.
DOI: 10.48577/jpl.1upfse
title: The Pan-STARRS1 z &gt; 5.6 Quasar Survey: III. The z ≈ 6 Quasar Luminosity Function

description: We present the z ≈ 6 type-1 quasar luminosity function (QLF) based on the Pan-STARRS1 (PS1) quasar survey. The PS1 sample includes 119 quasars at z ≈ 5.7 − 6.2 with −28 􏰃 M1450 􏰃 −25. Complemented by 48 fainter quasars from the SHELLQs survey, we evaluate the z ≈ 6 QLF over −28 􏰃 M1450 􏰃 −22. Adopting a double power law with an exponential evolution of the quasar density (Φ(z) ∝ 10k(z−6); k = −0.7), we use a maximum likelihood method to model our data. We find a break magnitude of M∗ = −26.59+0.92 mag, a faint end slope of α = −1.77+0.30, and a steep bright end −0.53 −0.17 slope with β = −4.04+0.80. Based on our new QLF model we determine the quasar comoving spatial −1.49 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 &lt; −26) = 1.15+0.14 cGpc−3. In comparison with the literature, we find 1450 −0.13 density at z≈6 to be n(M the quasar density to evolve with a constant value of k ≈ −0.7 from z ≈ 7 to z ≈ 4. Additionally, (z = 6) = 7.44+1.84 × 1022 erg s−1Hz−1cMpc−3 based on the 912 −1.17 we derive an ionizing emissivity of ε QLF measurement. Given standard assumptions and the recent measurement of the mean free path of Becker et al. (2021) at z ≈ 6 we calculate an HI photoionizing rate of ΓHI(z=6) ≈ 6 × 10−16 s−1, strongly disfavoring a dominant role of quasars in hydrogen reionization.
DOI: 10.48577/jpl.adsqc0
title: Understanding spatially unresolved measurements of molecular line emission

description: Context. Observations of molecular emission lines are commonly used to derive the physical properties of cold molecular gas clouds. In external galaxies, these measurements suffer from limited spatial resolution, typically averaging over several to tens parsecs of a complex position-position-velocity distribution of emission. Aims. We aim to quantify the variability in the basic parameters (peak brightness, line width) of spatially unresolved (&gt;20 pc) line profiles that can be attributed to beam-averaging. We focus on the commonly observed low-J transitions of CO isotopologues, HCN, ++ HNC,HCO ,CS,SOandN2H . Methods. We generate a sample of 1000 toy molecular cloud observations by resampling high resolution (&lt;0.05 pc) multi-line Galac- tic observations of the Orion B molecular cloud. In the construction of our toy clouds, we impose a range of density and velocity fields, characterized by their statistics and power spectra. These high resolution molecular cloud observations are then averaged to single unresolved spectra. We examine the resulting distribution of line profile parameters, and probe for potential correlations between line profile parameters and the underlying sub-beam density and velocity fields. Results. We find that unresolved line profiles parameters can vary significantly because of the sub-beam distribution of the emission. Emission lines that tend to be excited at higher densities show the most variability, up to a factor two for N2H+ (J = 1 → 0). Overall the variability of an emission line profile is correlated to the emission line’s beam filling factor. As the spectral index of the velocity field increases, unresolved emission lines profiles increasingly diverge from a Gaussian shape. Conclusions. Line profile parameters exhibit non-negligible variability solely due to the sub-beam position-position-velocity distri- bution of the emission. This variability may exceed calibration and noise related uncertainties.
DOI: 10.48577/jpl.za4l76
title: PRIMA: Isotopic composition of cometary water and the origin of Earth’s oceans

description: Studies of the water content and isotopic composition of water-rich asteroids and comets are of key interest for understanding the late accretion stage of the Solar System cometary and chondritic materials. PRIMA can make an important contribution to solving this long-standing problem by carrying out direct measurements of the D/H ratioin a significant sample of Oort cloud and Kuiper belt comets, sampling the isotopic composition of the present-day outer Solar System. This would allow comparisons between different comet reservoirs, and with inner Solar System measurements in meteorites, as well as searching for correlations with physical parameters, such as hyperactivity, providing quantitative constraints on the dynamical and chemical models of the early Solar System.
DOI: 10.48577/jpl.ujmv0m
title: A Multiwavelength Portrait of the 3C 220.3 Lensed System

description: The 3C 220.3 system is a rare case of a foreground narrow-line radio galaxy (“galaxy A,” zA = 0.6850) lensing a background submillimeter galaxy (zSMG = 2.221). New spectra from MMT/Binospec confirm that the companion galaxy (“galaxy B”) is part of the lensing system with zB = 0.6835. New three- color HST data reveal a full Einstein ring and allow a more precise lens model. The new HST images also reveal extended emission around galaxy A, and the spectra show extended [O II] emission with irregular morphology and complex velocity structure. All indications are that the two lensing galaxies are a gravitationally interacting pair. Strong [O II] emission from both galaxies A and B suggests current star formation, which could be a consequence of the interaction. This would indicate a younger stellar population than previously assumed and imply smaller stellar masses for the same luminosity. The improved lens model and expanded spectral energy distributions have enabled better stellar-mass estimates for the foreground galaxies. The resulting dark matter fractions are ∼0.8, higher than previously calculated. Deeper Chandra imaging shows extended X-ray emission but no evidence for a point X-ray source associated with either galaxy. The detection of X-rays from the radio lobes of 3C 220.3 allows an estimate of ∼3 nT for the magnetic fields in the lobes, a factor of ∼3 below the equipartition fields, as typical for radio galaxies.
DOI: 10.5281/zenodo.15212572
title: BOSHLANG'ICH SINF O'QUVCHILARINING NUTQIY KOMPETENSIYASINI RIVOJLANTIRISH DOLZARB PEDAGOGIK MUAMMO SIFATIDA
DOI: 10.5281/zenodo.15212573
title: BOSHLANG'ICH SINF O'QUVCHILARINING NUTQIY KOMPETENSIYASINI RIVOJLANTIRISH DOLZARB PEDAGOGIK MUAMMO SIFATIDA
DOI: 10.48577/jpl.dpq8ru
title: The High Energy X-ray Probe (HEX-P): the most powerful jets through the lens of a superb X-ray eye

description: A fraction of the active supermassive black holes at the centers of galaxies in our Universe are capable of launching extreme kpv-long relativistic jets. These jets are known multi-band (radio to $\gamma$-ray) and multi-messenger (neutrino) emitters, and some of them have been monitored for over two decades at all accessible wavelengths. However, several open questions remain unanswered about the processes powering these highly energetic phenomena. These jets intrinsically produce soft-to-hard X-ray (0.2-80 keV) emission, and simultaneous broadband X-ray coverage, combined with excellent timing and imaging capabilities, is required to uncover the physics of jets. Indeed, truly simultaneous soft-to-hard X-ray coverage, in synergy with current and upcoming high-energy facilities (such as IXPE, COSI, CTA, etc.) and neutrino detectors (e.g., IceCube), would enable us to disentangle the particle population responsible for the high-energy radiation from these jets. A sensitive hard X-ray survey (F(20-80 keV) &lt; 1e-15 rm erg/cm2/s) could unveil the bulk of their population in the early Universe. Acceleration and radiative processes responsible for the majority of their X-ray emission would be pinned down by microsecond timing capabilities at both soft and hard X-rays. Furthermore, imaging jet structures for the first time in the hard X-ray regime could unravel the origin of their high-energy emission. The proposed Probe-class mission concept High Energy X-ray Probe (HEX-P) combines all these required capabilities, making it the crucial next generation X-ray telescope in the multi-messenger, time-domain era. HEX-P will be the ideal mission to unravel the science behind the most powerful accelerators in the universe.
DOI: 10.48577/jpl.ralkzz
title: Geodetic Investigations of the Europa Clipper Mission

description: One of the objectives of the Gravity and Radio Science (G/RS) instrument on NASA’s Europa Clipper mission is to improve our knowledge of Europa’s ephemerides, to trace the moon’s thermal-orbital evolution. Here, we present a complementary methodology to use the Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON) instrument to enhance these measurements by tracking echoes from Europa at greater distances, beyond its primary role of subsurface sounding during close flybys. We investigate the possibility of occasional REASON measurements during the non-nadir phase at altitudes beyond 40,000 km to extend the ephemerides dataset. Through radar simulations of REASON’s echoes, we evaluate and demonstrate this approach by determining the maximum altitude for surface return detection, achieved by coherently processing hundreds to thousands of pulses within the signal’s round-trip time. The received signal’s power can be further enhanced by maximizing pulse length, targeting Europa’s most reflective (leading sub-Jovian) hemisphere, and summing many compressed pulses. We also explore a phase shift approach for velocity measurements, which uses existing ranging pulses. Using Europa Clipper’s most recent trajectory design, we identify flybys that align with the best working scenarios for this approach. Our performance estimates for range and velocity resolution demonstrate that this approach could obtain measurements relevant to Europa’s ephemerides. This method offers key insights into Europa’s orbital evolution and, ultimately, its long-term habitability.
DOI: 10.15468/dl.2faue7
title: Occurrence Download

description: A dataset containing 16488 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Ixodes scapularis Say, 1821"
 ]
}

 The dataset includes 16488 records from 43 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0022158-250402121839773/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.48577/jpl.vkp1az
title: A Novel Method for Computing State Transition Matrices due to the Unscented Transform

description: We present a new method for computing the state transition matrix of a nonlinear dynamical system. The proposed method does not require the implementation of complex partial derivatives or auto-differentiation of the dynamics, while removing the arbitrary choice of a perturbation step for traditional finite difference methods. We tested the new state transition matrices using three different applications: a simple two-body problem, a Mars atmospheric entry flight mechanics problem, and two future close encounters of the asteroid (101955) Bennu with the Earth. Results show that the unscented transform state transition matrices preserve symplecticity and perform just as well as the classical unscented transform. Furthermore, the new method can closely reproduce posterior distributions generated using Monte Carlo simulations, even in the presence of significant stiffness in the dynamics.
DOI: 10.48577/jpl.vc0v2t
title: Organic Adsorption onto Iron Hydroxide and Sulfide Minerals: Implications for Ceres Sample Return Analysis

description: Characterizing the past and present habitability potential of Ceres is an important goal of a future NASA mission to the dwarf planet. Signs of organic molecules (potentially amino acid, carboxylic acids, etc.) on the surface of Ceres may be present and potentially interacting with surrounding minerals. To understand the potential environmental conditions of Ceres, we have developed an experimental matrix to investigate if potential organic acids are able to adsorb onto minerals commonly found on similar systems (carbonaceous chondrites). The focus of this work is to understand the interaction between five organics (alanine, glycine, acetate, malic acid, and aspartic acid) on two minerals systems (iron sulfides and iron (hydr)oxides) in a Ceres-like environment. Our experiments revealed little to no adsorption of amino acids onto each of the Fe-mineral (Fe (oxy)hydroxides and Fe sulfides). Our results also revealed that the redox state of our Fe2+ and Fe3+ minerals precipitated with NaOH remained stable throughout the experiment, however Fe2+ and Fe3+ minerals precipitated with Na2S experiment reduction or were maintained as reduced Fe2+ species. This work shows that organic acids remain mobile and may be used for further reactivity towards other complex molecules with astrobiological relevance.
DOI: 10.48577/jpl.neqxf6
title: Application of Electron Paramagnetic Resonance Spectroscopy for Studies of Prebiotic Metals and Complexes

description: Metals and metal-organic mixtures are hypothesized to have played a crucial role in life’s emergence, particularly at metal-rich geological settings such as hydrothermal vents. Electron paramagnetic resonance (EPR) is an important tool in chemical analysis of materials or complexes with unpaired electrons. Owing to its sensitivity to spin-orbit coupling, electron-electron magnetic interactions systems with multiple unpaired electrons, and hyperfine interactions with nuclear magnetic moments, this spectroscopic technique provides detailed information regarding the spatial arrangement of coordinating ligand fields and the hydration environments of paramagnetic species. Herein, we introduce EPR methods relevant for prebiotic chemistry studies, particularly to examine organo-metallic interactions relevant to prebiotic and early biological systems. We report on the analysis of metal–organic mixtures using primarily continuous wave EPR spectroscopy with some supplementary pulsed EPR approaches, identifying what impacts organics have on mineral analysis under early Earth relevant conditions, and examine specific ligand coordination (amino acids and quinones, among others) of three abundant paramagnetic ions of relevance to prebiotic geochemical origins of life (Fe2+, Fe3+, Mn2+). We conclude with a detailed discussion of the impacts and implications of this work on the use of EPR with laboratory-scale origins of life studies, while suggesting future directions of research within the field.
DOI: 10.15468/dl.bxcymn
title: Occurrence Download

description: A dataset containing 226248 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((-5.58929 36.04465,-4.48325 36.66816,-2.08684 36.69773,-1.01767 37.63783,-2.97167 38.56619,-4.55699 38.65262,-6.06857 38.53736,-7.65389 37.90012,-7.61703 37.28666,-6.99027 37.25733,-6.54786 36.90438,-6.51099 36.54978,-5.58929 36.04465))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Plantae",
 "Year 2020-2025"
 ]
}

 The dataset includes 226248 records from 44 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0022152-250402121839773/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17632/hbhmcgv6tg.1
title: Sustainable Production of Xylo-Oligosaccharides: A Comparative Environmental Life Cycle and Techno-economic Analysis

description: The Supplemental Data dataset provides an in-depth overview of a biorefinery system that processes 89.45 dry metric tons of oat bran per day into value-added products such as xylo-oligosaccharides (XOS) of varying purities, crystalline and syrup forms of D-xylose, lignin oil, and cellulose microfibers. It also includes an alternative configuration featuring a combined heat and power (CHP) system that generates electricity and steam from residual biomass. The dataset encompasses detailed process descriptions for feedstock handling, pretreatment, enzymatic hydrolysis, purification, and product recovery. It includes life cycle inventory (LCI) data adapted from the Ecoinvent database, techno-economic assumptions, capital and operational costs, and system-wide mass and energy balances. Additionally, it presents comparative environmental impact assessments using TRACI indicators and global warming potential (GWP) values for both the baseline and CHP scenarios. This comprehensive dataset supports both techno-economic analysis (TEA) and life cycle assessment (LCA) of biorefinery pathways for sustainable biochemical production.
DOI: 10.15468/dl.66orcy
title: Occurrence Download

description: A dataset containing 1350 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Pipile cumanensis (Jacquin, 1784)"
 ]
}

 The dataset includes 1350 records from 22 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000213-150210113312293/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.6rehz4
title: Occurrence Download

description: A dataset containing 23 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Echeandia montealbanensis Cruden"
 ]
}

 The dataset includes 23 records from 10 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0185885-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.teqewc
title: Occurrence Download

description: A dataset containing 2851 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((3.4714297787173685 46.819779917958016,6.438462745750346 46.819779917958016,6.438462745750346 49.786812884990994,3.4714297787173685 49.786812884990994,3.4714297787173685 46.819779917958016))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Anser anser (Linnaeus, 1758)",
 "Year 1954-2020"
 ]
}

 The dataset includes 2851 records from 35 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0140204-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.zqsg5p
title: Occurrence Download

description: A dataset containing 4255 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Country is Chile",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Chlorophyta",
 "Year 2000-2023"
 ]
}

 The dataset includes 4255 records from 32 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0185883-230224095556074/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.faenoo
title: Occurrence Download

description: A dataset containing 17 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Lophostoma carrikeri (J.A.Allen, 1910)",
 "DatasetKey is Field Museum of Natural History (Zoology) Mammal Collection"
 ]
}

 The dataset includes 17 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0000213-150211104439307/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.t28kb4
title: Occurrence Download

description: A dataset containing 2134 species occurrences available in GBIF matching the query:
{
 "and" : [
 "Geometry POLYGON((4.702148437499998 46.8105474114418,7.338867187499998 46.8105474114418,7.338867187499998 49.4472661614418,4.702148437499998 49.4472661614418,4.702148437499998 46.8105474114418))",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Anser anser (Linnaeus, 1758)",
 "Year 1953-2020"
 ]
}

 The dataset includes 2134 records from 27 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0140214-200613084148143/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.